Title:
Motor-driven shutter-release mechanism for automatic cameras
United States Patent 2371593


Abstract:
This application is a division of co-pending application Ser. No. 476,456, filed February 19, 1943, in the names of Archie H. Gorey, Louis D. Nadel, Reynold J. Nitsch and Oscar Steiner, for automatic aerial cameras. This invention relates more particularly to motor-driven curtain-shutter...



Inventors:
Gorey, Archie H.
Nitsch, Reynold J.
Application Number:
US50737043A
Publication Date:
03/13/1945
Filing Date:
10/23/1943
Assignee:
FOLMER GRAFLEX CORP
Primary Class:
Other Classes:
396/479, 396/502
International Classes:
G03B9/08
View Patent Images:



Description:

This application is a division of co-pending application Ser. No. 476,456, filed February 19, 1943, in the names of Archie H. Gorey, Louis D.

Nadel, Reynold J. Nitsch and Oscar Steiner, for automatic aerial cameras.

This invention relates more particularly to motor-driven curtain-shutter release mechanism for cameras, which may be of general application, and particularly to fully automatic aerial cameras.

In order that the principle of the invention may be readily understood, there is disclosed a single embodiment of the invention in the accompanying drawings, whereinFig. 1 is a right-hand side elevation of the camera as mounted in an aeroplane and showing the driving motor partly broken away, the cable for connecting the mechanical power from the motor to the camera being also shown; Fig. 2 is a left-hand side elevation of the camera with the mechanism plate and motor drive removed so as more clearly to show the camera operating mechanism; Fig. 3 is a detail of the shutter release cam plate; Fig. 4 is a left-hand end view of Fig. 3: Fig. 5 is an enlarged detail of the operating lever or link for the capping gates; Fig. 6 is a partial section through the camera taken on the line 6-6, Fig. 7, showing the motor drive mechanism and its application to the camera drive mechanism: Fig. 7 is an enlarged fragmentary view similar to a part of Fig. 1, certain parts being broken away more clearly to show the operation of the mechanism; Fig. 8 is a view similar to Fig. 7, but having additional parts broken away so as further to show the motor drive mechanism; Fig. 9 is a plan view of the shutter curtain showing the several apertures thereof; Fig. 10 is a left-hand side elevation showing in full lines certain only of the parts shown in Fig. 2, and indicating their movements by arrows; and Fig. 11 is a vertical transverse section through the camera, showing the position of the film spools, the shutter curtain spools and shutter curtain rollers, the capping gates being shown held open as they are when the camera is used for night photography.

The motor-driven curtain-shutter release mechanism herein disclosed is s'own and described as used in an aerial camera intended primarily to be operated by an electric motor, but it can be readily operated by hand. The invention herein claimed is not to be limited to use in an aerial camera.

While the invention herein claimed is directed to motor-driven curtain-shutter release mechanism, brief reference will be made to certain parts of the camera structure, and particularly to Pig. 1.

Referring first to Pig. 1, wherein the camera is shown in outline in the position in which it is to be mounted in an aeroplane, the camera body is indicated at 20, and thereto the camera magazine 21 is attached by screws 22, 22, said magazine being provided with a mechanism cover indicated generally at 23 and held to the magazine by screws 24, 24. Attached to the said mechanism cover 23 is a motor-drive-unit mechanism, housing or box, indicated generally at 25, and having a flange-like formation 26, the said unit, housing or box being held to the mechanism cover 23 by screws 27, 27. A worm gear housing 28 is attached to the said motor drive unit 25 by screws 29, 29 and formed integral with the unit or housing 25 is a box-like structure 30 (best shown in Figs. 7 and 8) having a cover 31 (Fig. 1) attached thereto by screws 32, 32 threaded in suitable holes in the said box-like structure 30.

Projecting from the magazine cover 23 is a shutter reset knob 33, an escutcheon plate 34 being also attached to said cover 23 by means of 3screws 35, 35, and through said plate 34 the shutter speed indication is visible, as clearly evident from Fig. 1. A signal receptacle 36 is attached to the camera body 20 by screws 37, 37, and by suitable screws (not shown) a lens support 38 is attached to the lower face of the camera body, and to said lens support is attached a lens shade 39. A lens mount 40 with a suitable lens for aerial photography particularly, though not 40 exclusive, is shown in said figure in dotted lines, and it is therein represented as provided with a diaphragm adjusting lever 41 that protrudes through an open slot 42 in said lens shade 39, being held in position by a lock plate 43 attached to the lens shade 39 by suitable screws.

Also shown in Fig. 1 is a flexible shaft coupling 44 of suitable construction that is attached to the worm gear or motor drive housing and to said coupling 44 is fitted a suitable flexible shaft 50 coupling 45, itself attached to a flexible shaft, tubular housing 46 through which passes a flexible drive shaft 47. The opposite end of the said flexible shaft, tubular housing 46 is provided with a second coupling 48 attached to an electric 55 drive motor 49 supported on a wall of the aeroplane by means of a support plate 50 and screws 51, 51.

Fitted between the camera magazine 21 and the camera body 20 is a capping gate supporting plate 121, and between said supporting plate I21 and a suitable aperture-plate receiving ledge 123 are mounted (as shown in Fig. 11) the shutter-curtain rewind roll 124 and shutter tension roll 125, and the shutter curtain 129, which is wound upon the shutter rewind curtain roll 124 before making an exposure and when released for making an exposure, is wound on the tension roller 125 by a suitable tension spring 128, guide rollers 130 and 131 being provided. These parts, not being herein claimed, need not be more specifically described.

Reference being made particularly to Fig. 9, wherein, without in any way limiting the scope of the invention, there is shown a suitable shutter curtain, it is to be understood that such curtain is provided with at least two exposure apertures. Preferably, as shown in said figure, the shutter curtain 129, desirably of rubberized cloth, is presented as having two instantaneous exposure apertures 129a and 12b9 for day .photography and a full exposure aperture 12 9c, the latter being used when making night or flash exposures. The instantaneous aperture 129a is .used for the highest .shutter speed which in the present embodiment.of the invention is o/6o0 of a second. The shutter aperture 129b is used for the .lower instantaneous speed, which in the present instance is Yoo of a second. :Both of said apertures can be so proportioned that.any desirable shutter speed can be obtained, and are used for:day photography. The shutter curtain aperture .2Sc is, as .stated, used when making night or flash photographs. All the curtain.apertures are provided with usual or suitable metal struts or reinforcing members.

Concerning the capping gate structure, it is sufficient to state that the capping gate supporting plate 121 has pivoted thereto the righthand capping gate t132 and the left-hand capping gate 133 having .suitable :hinges. A latch plate 138 is attached to the hinge .member of the capping gate 132 in any suitable manner and is provided with two right-angularly shaped members 140, 140 having suitable holes to receive a rod or shaft 141 passing therethrough and into holes provided for that purpose in the capping gate supporting plate 121.

In Fig. 2, the capping gates 132, 133 are shown in their closed horizontal position in dotted lines, and are also shown in dotted lines in their open position. The normal position for said capping gates 132, 133 is a closed position, and they are in the open position only during the time of making an exposure, as well as at certain times prior to making a night exposure.

As indicated in Fig. 2, to the left-hand flange of the capping gate supporting plate :121 is fitted a capping gate actuating disk, indicated at 147, through which passes a shaft to the opposite end whereof is fitted and securely locked a pinion 1(8. till .referring to Fig. 2 and also to Figs. and 6, there is provided in meshing relation with the pinion 148 a gear I49 having attached thereto a qmaster shutter release lever 150, said gear and lever being free to rotate on a shoulder -rivet 151 itself riveted to the circular gear housing ,152 of the .camera magazine 21. The said disk 147 is connected to the hinge member 134 of the capping gate 1.32 by a connecting link member L52a .(shown in Fig. 2), one end of said link member being attached to the said disk 147 by shoulder rivet 153 (shown in Fig. 6), the opposite end of the said link member 152a being connected to the said hinge member 134 of the capping gate 132 by a shoulder rivet 154 (best shbwn in Fig. 2 as:riveted into the rightangle extension 140 of the said hinge member 134). The hinge member for the capping gate 133 is connected to the said disk 147 by a connecting member 155 (best shown in Fig. 2) and by a shoulder rivet 156, Fig. 6, and is connected to the right-angled member 144 by a shoulder rivet 157.

When the master shutter release lever 150 is turned in a clockwise direction viewing Fig. 2, the disk 147 will be rotated in a contraclockwise direction, thereby causing the connecting link member 52a to be moved in a right-hand direction, carrying with it the right-angled member 140 of the hinge plate 134, thus causing the capping gate 132 to be turned in a contraclockwise direction viewing Fig. 2 (that is, into its open position), and the capping gate 133 will be caused to be turned in a clockwise direction (that is, into its open position) through the connecting link member 155. The shoulder rivet 156 (Fig. 6) is provided with a cylindrical extension 158 (shown in Figs. 2, 8 and 10) that engages a secondary shutter release lever 159 (shown in Figs. 6, 8 and 10) for releasing the shutter when the capping gates 132, 133 approach their full open position.

From the structure shown in Fig. 2, the mechanism cover plate 23 has been removed and one wall of the camera body 20. has been cut away in order to show more clearly the shutter mechanism and the film.rewind mechanism. The shaft 98 on the shutter-curtain take-up roll .96 passes through the magazine end wall 83, being fitted with a pinion suitably held to its shaft. The shaft of the usual shutter-curtain tension roller 125 extends through the magazine end wall 83 and has fitted thereon a lock plate 162 (Fig. 2) for the purpose of turning the said .shaft, and 4. thereby tensioning the usual spring for said shaft. When sufficient tension has been placed on said spring, screws 163, 163 are threaded into suitable holes in the said magazine outer wall 83 so as to engage notches 1G4 of the said lock ~ plate 162.

Referring now to Figs. 2 and 6, when the shutter curtain 129 is rewound for making an instantaneous exposure, the pinion 160 is turned in a clockwise direction by means of a shutter Srewind gear 165 that for such purpose is turned in a contraclockwise direction. In order to turn said pinion 160 in a clockwise direction for rewinding the shutter curtain, there is provided a train of gears, also serving for winding film 120 onto the take-up spool for a subsequent ex6o posure. Meshing with the said shutter rewind gear 165 is an idler gear 166 that meshes with a second idler gear 167, both of which idler gears are mounted on a gear rocker arm 168 (see also SFig. 10), the idler gear 166 being mounted on a shoulder stud 166a (best indicated in Fig. 6), the idler gear 167 being provided with a shoulder rivet indicated at 169. Threaded into the magazine end wall 83, as indicated in Fig. 2, is Sa shoulder screw 170, and pivoted thereon is the said gear-rocker arm 168 and also an idler gear 171.

Mounted on the take-up spool shaft 98 is a slip clutch drive (indicated generally at 172) having a gear 173 indicated in dotted lines in Fig. 2. as meshing with the idler gear T17 and also with an intermediate gear 174. The said gear 173 is of sufficient width to accommodate the faces of both gears 171 and 174, inasmuch as said latter gears are not in alignment but are so spaced that the gear 174 clears the gear 171.

Attached to the said intermediate gear 174 is a drive pinion 175, said gear and pinion being carried on a shoulder stud 176 threaded into the end wall 83 of the camera magazine. Meshing with the said drive pinion 175 is a main drive or master gear 177 having drive pins 178, 178.

The said main drive gear 177 is mounted on a shoulder stud 179 fitted to the said magazine end wall 83 (clearly shown in Fig. 6), the said main drive gear being held in place by a large head screw 180, and it is also provided, as shown in Fig. 6, with a hub 177a so as properly to space said main drive gear from the magazine end wall 83.

When the main drive or master gear 177 is turned in a contraclockwise direction viewing Figs. 2, and 6, the gear train, consisting of the gears 177, 175, 174, 173, 171, 167, 166 and 165 and the pinion 160 will be caused to turn, said pinion 160 being turned in a clockwise direction so as to wind up on the curtain roller, the shutter curtain 129 and the shaft of the take-up spool therefor will drive the spool in a contraclockwise direction, thus winding up the film 120, and as the film 120 is so wound it passes over and around the measuring roller, the shaft 93 whereof is turned in a clockwise direction, turning with it a pinion 181, thereby causing an index gear 182 (shown in Fig. 2) to be turned in a contraclockwise direction. Said index gear 182 is mounted on the magazine roll by means of a shoulder screw 183. Attached to the index gear 182 is a cam plate, shown in dotted lines at 184 in Fig. 2, being attached by suitable screws 185.

When the measuring roller on shaft 93 has turned a sufficient distance to cause a notch in the said cam plate 184 to be in the position shown in Fig. 2, the L-shaped end of a pawl arm 186 will drop into the said notch under the influence of a -spring 187 carrying with it a pawl 188. the said pawl arm being mounted on the magazine end wall 83 by a shoulder screw 189 (Fig. 2). The said pawl 188 will now enrare the teeth of a ratchet 190 of the said slip clutch 172. thus preventing further turning movement of the said take-up spool and thereby stopping further movement of the film 120.

The slip clutch 172 (indicated in Fig. 2) may be of any suitable construction and is desirably of the structure shown in the co-pending application of Gorey, Nadel and Hineline, Ser. No. 437,240. filed April 1, 1942, now Patent No. 2,362,813, dated November 14, 1944. The requirements of such slip clutch will now be set forth, and reference will be made to the immediately coacting parts. The shaft 98 carries and drives the take-up spool and integral with said shaft is the said ratchet 190. The gear 173 is mounted on the said shaft 98, but in such a manner that when a predetermined load just sufficient to wind film 120 on the take-up spool is put on said shaft 98, the said gear 173 will be allowed to turn even though said shaft 98 is held in a stationary condition. Therefore, when sufficient film has been measured off for an exposure, the L-shaped end of the pawl arm 186 engages the notch in the cam plate 184, and its pawl 188 will engage the teeth of the ratchet 190, thus preventing the take-up spool from being turned, but allowing the gear 173 to continue turning so as to complete the winding of the shutter curtain. The diameter of the measuring roll on shaft 93 and the gear ratio between the pinion 181 and the index gear 182 is such that when the index gear 182 makes one complete revolution, a sufficient amount of film will have been fed to provide a new unexposed area of film in front of the exposure opening. Referring to Figs. 2, 6 and 10, there is attached to the shutter curtain rewind gear 165, in a manner to be more fully described at a subsequent point, a shutter release cam plate 191 having a peripheral notch 192. To the magazine end wall 83 (best shown in Fig. 2) a shutter latch or subsidiary release lever 193 is attached by means of a shoulder screw 194, it being caused to rotate in a contraclockwise direction about the screw 194 by a spring 195, one end whereof is hooked in a hole 196 of the lever 193 and the opposite end whereof is engaged by pin 197. The said latch or subsidiary release lever 193 is provided with a downwardly extending dog 198 for engaging the peripheral notch 192 of the shutter release cam plate 191.

In Fig. 2, the mechanism is shown in condition for making an exposure, at which time the shutter curtain 129 has been rewound, so that the previously selected aperture will be in position for exposure, and a new area of sensitized film will be in position before the exposure opening. The capping gates 132, 133 will be in the horizontal position shown in the upper dotted lines in Fig. 2 (that is, in their closed position), and the pressure plate or pad 115 will be raised vertically from the film 120 (most clearly shown in Fig. 6). The said pressure plate or pad 115 is for that purpose positioned on four pressure plate 40 or pad raising pins 199 that pass through suitable holes of the inner wall of the camera magazine and also through suitable holes in the capping gate support plate 121 (shown in Fig. 2).

When the capping gates 132, 133 are in the open position (shown in the lower dotted lines in Fig. 2), the pins 199 are caused to be moved downwardly by the pressureu plate or pad 115 through the action of suitable plate springs 200, shown in Fig. 11 as pressing on the vertical members I l6, 116 of the pressure plate or pad 115.

5When the capping gates 132, 133 are closed (as indicated in the upper or horizontal dotted lines in Fig. 2 and in section in Fig. 6), the rods 199 are moved in an upward direction under the influence of the suitable hinge members, thus raising the pressure plate or pad 115 to the position indicated in Fig. 6.

When the master shutter release lever 150 (shown in Figs. 2 and 6) is caused to be rotated in a clockwise direction viewing Fig. 2, thereby opening the capping gates 132, 133 prior to making an exposure, as shown in the lower dotted line position, Fig. 2, the said pressure plate or pad 115 will be moved downwardly by means of the 65 said springs and will then securely hold the film 120 in contact with the exposure aperture plate, thereby clamping the film 120 between the said pressure plate or pad 115 and the said aperture plate. Said film 120 will be held in such clamped condition as long as the master shutter release lever 150 is held in the left hand position viewing Fig. 2, that being the position for making an exposure. When the said master shutter release lever 150 is released or allowed to turn in a contraclockwise direction viewing Fig. 2, thus closing the capping gates 132, 133, the pressure plate or pad 115 will be removed from contact with the film 120, thereby preventing any scratching or injury thereof during film winding prior to a second exposure.

In order to cause an exposure to be made, the following action takes place, reference being made particularly to Fig. 2 and also to Figs. 5, 6, 8 and 10, it being understood that the action in this respect is similar to that disclosed in the said co-pending application of Gorey, Nadel and Hineline, excepting for the means herein disclosed for turning the master shutter release lever 150 which is provided instead of the lever or trigger 40, shown in said co-pending application. The said master shutter release lever 150 is caused to be turned in a clockwise direction Viewing Figs. 2 and 10. This is actually done by the motor drive mechanism to be hereinafter fully described, and already referred to in the description of Fig. 1, but for simplification of the description at this point, it may be assumed that the said master shutter release lever 150 is moved manually. When so moved in a clockwise direction viewing Fig. 2, the gear 149 is also turned in a clockwise direction and pinion 148 is turned in a contraclockwise direction, turning with it the disk 147. Inasmuch as the shutter gate connecting links 152a, 155 are connected to the said disk 147, the capping gates 132, 133 will be swung open into the lower dotted line position shown in Fig. 2. The pressure plate or pad I 15 is thus allowed to move into contact with the film 120, and the pin 158 (shown in Figs. 2, 8 and 10 as in a slot of the secondary shutter release lever 159) will be turned in a contraclockwise direction, causing the secondary shutter release lever 159 (shown in Figs. 2 and 10) to be swung in a clockwise direction.

While all the operating parts herein claimed are shown in Figs. 2 to 8 inclusive, we have shown in an additional Fig. 10, in full lines therein, certain only of the parts that are shown in Fig. 2, since in Fig. 2 certain of the operating parts of the train of mechanism herein claimed are shown only in dotted lines. It is sufficient here to state that in Fig. 10 substantially only those parts are shown which are necessary to enable those skilled in the art to trace out the operation of the shutter from the drive mechanism. The capping gate mechanism is shown also in part in said Fig. 10, but therefrom are omitted substantially everything pertaining to the film supporting mechanism including the supply spool, the take-up spool, the measuring roller and the film rewind mechanism. We have also from the said Fig. 10 omitted the camera body and the camera magazine with its mechanism cover.

From all said figures have been omitted the pressure plate or pad 115 (shown in Fig. 11) for holding the film in flat position, and from Fig. 10 has been omitted the aperture plate with which the camera magazine is provided, and between which aperture plate and the said pressure plate or pad 115 the film 120 is held during the time of the exposure thereof.

Inasmuch as the shutter curtain rewind roll 124 and the shutter tension roll 125 are of usual construction, they have been omitted from all said figures except Fig. 11, but the drive shaft 126 of the shutter rewind roll is shown and is also shown in Fig. 11.

The capping gates constitute structurally and in function a part of the shutter mechanism.

Said capping gates are shown in dotted lines in Figs. 2, 8 and 10, and partially in full lines in Fig. 6. They are shown in full lines in Fig. 11, and therein is also shown the entire shutter mechanism, including not only said capping gates, but also the shutter curtain 129 and the means for supporting the same. While in said Fig. 11 the pressure plate or pad 115 for holding the film 120 in flat position and the means for supporting the film 120 are shown, it is unnecessary to describe the same, inasmuch as the invention herein claimed is directed particularly to the motor-driven curtain-shutter release mechanism. Referring to said Fig. 11, between the camera magazine and the camera body 20 is the capping gate support plate 121 having a flanged opening 122. Between the support plate and the aperture-plate-supporting receiving ledge 123 are the shutter curtain rewind roll 124 and the shutter tension roll 125, both of usual construction. The said rewind roll 124 is provided with the drive shaft 126, and the tension roll 125 is provided with the tension spring support 127 and the tension spring 128. The shutter curtain 129 is wound upon the said shutter rewind curtain roll 124 before making an exposure, and when released for making an exposure it is wound upon the said tension roll 125 by the said tension spring 128. In order to position the said shutter curtain 129 as close as possible to the focal plane, there are provided the curtain idler rolls 130, 131 supported on suitable pivots provided in the magazine end walls.

Referring to the capping gates and still referring particularly to Fig. 11, the hinge member 134 is provided with the said two right-angularly shaped members 140 having suitable holes to receive one rod or shaft 141 passing therethrough and into holes provided for that purpose in the capping gate support plate 121. The hinge member 135 is provided with right-angularly extending members 144, 144 receiving the other rod or shaft 141. Springs 142 and 145 are fitted over said shafts or rods 141, one end of each spring being'hooked over a part of the adjacent hinge plate, the opposite end of each spring engaging the lower flange of the capping gate support plate 121.

Inasmuch as the capping gates 132, 133 are structurally and in function a part of the shutter mechanism and are controlled from the motor drive, shown in Fig. 1, we have herein shown the train of mechanism extending from the motor 49 to the shutter curtain 129 and the capping gates 132, 133 of the shutter mechanism, thus completely disclosing the means for automatically releasing the shutter curtain 129 and for operating the capping gates 132, 133.

So far as we are aware, we are the first to provide means in an automatic camera for periodically operating capping-gate means and releasing the intimately co-acting shutter or shutter curtain, or other shutter element or shutter proper, used instead of a curtain type of shutter.

In the operation of the shutter mechanism, the means for which is herein subsequently described in detail, the shutter curtain 129, when released, is allowed to run down, and there is a dwell in the movement of a lever or link hereinafter described, owing to the cam formation of such lever or link, and during such dwell the capping gates 132, 133 are held open. Subsequently the master shutter release lever 150 is returned to its starting position, thus closing the capping gates 132, 133. This allows the idler gear 166 to mesh with the shutter rewind gear 165, so that the shutter curtain 129 is rewound and the film 120 moved for a new exposure. During a complete cycle of an interrupted gear (hereinafter referred to) the capping gates 132, 133 of the shutter mechanism are caused to open, thereby, through the action of the lever or link referred to, operating the master shutter release lever 150. During such cycle the capping gates 132, 133 are opened, the idler gear 166 is disengaged from the shutter rewind gear 165, and the subsidiary shutter release lever 193 is moved upwardly to disengage the dog 198 from the notch 192 of the shutter release cam plate 191, whereupon the shutter curtain 129 can run down.

In the operation of our invention, there is provided shutter mechanism including a shutter proper 129 that is preferably of the curtain type and capping means preferably composed of two capping gates 132, 133, which shutter proper and capping means are in immediate proximity and are intimately associated with each other, and we provide operating connections from the motor drive to the capping means and the shutter proper 129 to control or operate said capping means and to release the shutter.

The secondary shutter release lever 159 is attached to a shaft 202 (most clearly shown in Figs. 6 and 10) that passes through the magazine end wall 83. To the right-hand end of said shaft 202, viewing Figs. 6 and 8, a lever 204 is attached by means of a lock screw 205 (Fig. 2), such lever carrying a shoulder rivet 206 (shown in Figs. 2, 6 and 10) engaging a slot 207 of the gear releasing link 208 (best shown in Figs. 2, 8 and 10), which is attached to the rocker arm 168 by a shoulder screw 209. As the said lever 204 is rotated in a clockwise direction, viewing said figures, the shoulder rivet 206 moves upward in said slot 207 and the upper face of said lever 204 as shown in Fig. 2 engages the lower end of a locking lever 210 there shown pivoted on a shoulder screw 211, thus causing said locking lever 210 to be turned in a contra-clockwise direction, thereby tensioning a spring 212, one end whereof is hooked in a suitable hole in the locking lever 210 and the opposite end whereof is hooked to a pin 213 on a stationary part of the camera.

The said locking lever 210 is provided with a hooked formation 214 for engaging a cylinder extension 215 of the shoulder rivet 169.

The purpose of the locking lever 210 is to hold the idler gear 166 in mesh with the shutter rewind gear 165 when the shutter curtain is rewound, but as the lever 204 is rotated in a clockwise direction viewing Figs. 2 and 8, thus causing the rocking lever 210 to be turned in a contraclockwise direction, the hook member 214 will be disengaged from the cylindrical extension 215 6g of the pin 169 (shown in Fig. 2), and as the said shoulder rivet 206 of the lever 204 reaches the bottom of the slot 207, the rocker arm 168, Fig. 2, will be caused to move in an upward direction to disengage the idler gear 166 from the shutter rewind gear 165.

Further movement of the said lever 204 through the operation of the secondary shutter release lever 159 (Fig. 10) will cause the shutter latch or subsidiary release lever 193 to be turned in a clockwise direction by reason of a shutter release link 216 (Fig. 2) that is attached to the rocker arm 168 by screws 217, thus withdrawing the dog 198 from the notch 192 of the shutter release cam plate 191 (Fig. 4). The shutter curtain will now be allowed to run down, thereby making an exposure.

Referring now to the master shutter release lever 150 on gear 149, when said lever 150 is caused to be moved in a contra-clockwise direction viewing Fig. 2 under the influence of springs 142, 143 and 145 of the capping gates 132, 133, the lever 204 through the intermediary of the lever 159 and link 155 will be returned to the position shown in Fig. 2. The idler gear 166 carried on the gear-rocker arm 168 will be allowed to move in a downward direction so as again to engage the shutter rewind gear 165 and allow the shutter latch or subsidiary release lever 193 to drop onto the shutter release cam plate 191 (Figs. 2 and 10), the locking lever 210 being caused to move in a clockwise direction, thereby allowing the hooked member 214 again to engage the cylindrical extension 215 of the shoulder rivet 169. The camera will then be in condition for the rewinding of the shutter and the feeding of a new area of film before the exposure opening.

Referring now to Fig. 2, as the shutter curtain 129 runs down and, in doing so, turns pinion 160 on the shaft of the curtain take-up roll 125 in a contraclockwise direction and also turns the shutter rewind gear 165 in a clockwise direction, a pin 218 carried by the shutter release cam plate 191 (Fig. 3) will have turned with the shutter rewind gear 165 until said pin 218 contacts with a bell crank lever 220 (shown in full lines in Fig. 6 and in dotted lines in Fig. 2). The said bell crank lever 220 will be caused to move in a contraclockwise direction on shaft 202 (Fig. 6), carrying with it a film-feed dog-connecting-link 221 that is attached (as shown in Figs. 2 and 6) to the said bell crank 220 by means of a shoulder rivet 222. The opposite end of the said connecting link 221 is attached to the pawl arm 186 (as shown in Fig. 2) by means of a shoulder rivet 223. The pawl 188 will now be disengaged from the ratchet teeth 190 of the clutch 172 and the L-shaped end of the pawl arm 186 will be disengaged from the notch in the cam plate 184 (Fig. 2).

When the main drive or master gear 177 (Fig. 2) is now turned in a contraclockwise direction for rewinding the shutter curtain 129 and feeding and winding sensitized material 120, the shaft 98 (Figs. 1 and 2) will be free to rotate, and film is accordingly wound up on the take-up spool 96, causing the measuring roller on shaft 93 to be turned and also moving the notch in the cam plate 184 away from the L-shaped end of the lever 186. As the main drive or master gear 177 continues to turn, the shutter rewind gear 165 will also be turned, carrying with it the pin 218 (Fig. 2) in a contraclockwise direction and away from said bell crank 220, (Figs. 2 and 6), allowing the pawl arm 186 to be turned in a clockwise direction, but it will be withheld from turning sufficiently far to allow the pawl 188 to engage teeth 190, because the notch in the cam plate 184 will have moved out of a position in which it could be engaged by the L-shaped end of the pawl lever 186, and it will be held in such disengaged position until a sufficient amount of film has been wound to provide an unexposed area for a new exposure. The cam plate 184 (Fig. 2) will then have made a complete revolution, and the L-shaped end of the pawl 186 will again engage the notch in the cam plate 184, and the pawl 188 will engage the ratchet teeth 190.

Referring to Fig. 2, the shutter rewind gear 165 will continue to rotate until the notch 192 in the cam plate 191 is engaged by the pawl 198 of the shutter latch or subsidiary release lever 193.

The shutter will now be fully rewound and an unexposed area of the film 120 will be in position.

Referring to Fig. 2, the shutter rewind gear 165 will be stopped from further turning in a contraclockwise direction by pin 218 engaging said bell crank 220. The rocker arm 168 is 1C caused to be turned in a clockwise direction for engaging the teeth of the gear 166 with the teeth of the shutter rewind gear 165 by means of a suitable spring (not shown), but one end of which is hooked to a pin 225 at the extreme up- 1u per end of Fig. 6 that is an extension of a shoulder rivet 226 (shown in Fig. 6) that carries the gear 166.

One revolution of the shutter rewind gear 165 with its shutter setting knob turns the pinion 2( 1'0 and the curtain take-up roller 124 sufficiently to move the shutter curtain 129 just the right distance to bring into position a different curtain aperture fdr a subsequent exposure. That is to say, if the shutter curtain 129 were previ- 2 ously set in a position to have the exposure slot for ~ bodf a second aligned for making an exposure, one complete turn of the shutter setting kniob in a coritraclockwise direction would bring the shutter curtain 129 -in position for a 0oo of a 31 second exposuire. If the shutter curtain 129 had been set in position for a %oo of a second exposure, then two full turns of the shutter setting knob in a clockwise direction would so move the shutter 'curtain :1 9 that the full open curtain 3 aperture would 'be in position to move before the shutter curtain 129 -exposure opening, when the shutter 'vas released. This provides ready means of selecting any particular shutter aperture. ltaking.reference to Figs. 1 and 5 to 8, it is to 4 be understood that the foregoing description of the operation of the camera imechanism assumed that the main drive gear or master gear 177 is operated nkalnually, but the present invention'ih- 4 cludes, and is in part particularly directed to, the prvisiorn as a novel feature of a drive mechanism 'providing automatic operation, which in the disclosed embodiment of the invention is imade up of 'agear box or housing constituting the 51 mnIotor drive unit previously referred to and generally indicated at 25 in Figs. 1, etc., to be referred to as drive mechanism, and also includes the electric motor indicated at 49 in Fig. 1, and the cable 46, 47, 48 to transmit power from said s. electric motor 49 to the motor drive unit, gear box or mechanism housing 25. The camera is also constructed for automatic operation and is provided with an electrical circuit including a number of switches and is also provided with tp means for remotely controlling the camera with respect to the several different types of operating cycles.

Referring particularly to Figs. 6 and 7, wherein is shown in great detail the structure of the 0 power drive mechanism, and particularly referring first to Fig. 6, there is mounted on the motor drive unit, gear box or housing 25 a large shouldered.stud 266 having an enlarged diameter 267 and a head 268, and mounted on said enlarged 71 diameter 267 is a drive plate .269 having a hub 270. The said drive plate has a series of peripheral notches 271 (shown in dotted lines, Fig. 7), which are engaged by the pins 178 (Figs. 6 and 7) of the said main drive or master gear 177. 7 Attached to the hub 270 by a coining operation is an interrupted gear 272, the construction of which is best shown in Fig. 8, wherein three of the teeth on each side of the gear (that is, opposite each other) are cut away to fit the interrupted face of a second interrupted gear 273 which has teeth provided on only one half of its periphery, the balance of the periphery being cut down on a true radius to the pitch line of the I gear. Such a structure of interrupted gearing for providing intermittent motion is per se well known in the art and hence need not be more particularly described, but the application thereof to its present purpose is wholly novel.

The shouldered screw stud 266 is held to the motor drive unit, gear box or housing 25 by a lock nut 274 and a locking washer 275. The hub 270 and the interrupted gear 272 are free to turn on the enlarged diameter 267 of the shoulder 0 screw stud 266 and the said gear 272 is driven intermittently by the -econd interrupted gear 273 which is connected to a hub 276 by three through-pins 277, one of which is shown in Fig. 6, one end of each of said pins being riveted to a driving ratchet member 278. The other end passes through a hole in the interrupted gear 273 and such gear is held to the hub 276 by a screw 279 (Fig. 6). The hub 2T1 rides in a bushing-280 fitted into the inner wall 281 of the motor-drive0 unit housing or gear box-25.

A worm gear 282 (shown in side elevation in Fig. 7) is free to rotate on the hub 216 between the ratchet member 278 and a thrust Washer 283, said ratchet member being held to the hub:26yby 5 screws 284. Said hub 276 is provided with a reduced diameter extension or hub portion 28 'free to turn in a bushing 286-fitted in the gear box cover 28. The said -worm gear -282 is -provided with a pawl 287 (Fig. 7) held thereto by a shoul0 der rivet 288 and caused to engage the teeth of the said ratchet meinber or wheel2 78 by a spring 289 held to the worm gear 282 by a screw.290.

Referring to Figs. 6 and 7, there is attached to the interrupted gear 273 a switch operating Scam plate 291 held by means of three screws 292, one of which is shown in Fig. 7. The said interrupted gear '273 is provided with an elongated slot 293 (Fig. 7) to provide ýa small amount of adjustment of the cam plate 291 with respect 0 to the interrupted gear 273 and under each:screw head 292 is placed a washer 294.

The worm gear 282 meshes with a worm 295 carried by a shaft 296,;-ne end whereof is free to turn in a bushing 297, and the opposite end is 5 provided with a drive bushing or sleeve 298 free to turn in the cable connecting bushing'44 -(shown in Fig. 1) and threaded into the wall of the mechanism drive unit, housing or'box 25, being locked thereto by a:locking screw 299 (Fig. 7). The said ' drivebushing or sleeve 298 is-pinned to the:shaft 296 by a taper pin 300, the Worm 295-is pinned to the shaft 296 by a taper pin 301, and the left hand end of the said worm 295 is provided with a thrust washer 302.

5 The hub 285 is provided with an internalthread 303 (shown in Fig. 6) affording means for connecting a crank for hand operationiof the camera, 'if desired. The hub 285 can be turned by harid by means of such crank without turning the worm 0 gear 282, because of the provisiqn of the ratchet 278 and the pawl 287. When the wormn gear 282 is driven in a clockwise "direction by the ,'worm 295, the hub 276 and the:gear 273 will also-be turned in a clockwise direction. If for any'reason 5 the worm gear 282 were turhed in a contraclockwise direction, the hub 276 and the interrupted gear 273 would remain stationary because of the provision of the ratchet 278 and the pawl 287.

This provision is of a great importance, because if the camera were driven in a reverse direction, it would necessarily be seriously injured.

Referring particularly to Figs. 5, 6 and 7, the interrupted gear 273 carries a pin 304 (shown in full lines in Fig. 6 and in dotted lines in Fig. 7) for operating the shutter release at the proper time by transmitting motion from said pin 304 to the master shutter release lever 150 (shown in Fig. 2 and also in Fig. 6). There is provided an operating lever or link 305 (best shown in Figs. and 6) provided with a cam face 306 engaged by said pin 304, and as said pin turns in a clockwise direction it causes the operating lever or link 305 to be moved in a contraclockwise direction on a pin 307 threaded into a plate 308 and locked thereto by lock nut 309, said plate 308 being attached to one wall of the camera body 20 by screws 310 (Fig. 7).

The operating lever or link 305 is provided with a cylindrical extension or pin 305a Figs. 2 and 6, which engages the slot 150a of the said master shutter release lever 150 (Fig. 2). Thus each time that the interrupted gear 273 makes a revolution, the connecting lever or link 305 is caused to be turned in a contraclockwise direction, thus operating the master shutter release lever 150 in a clockwise direction, thereby causing the capping gates 132, 133 to be operated and the shutter curtain 129 to be released as previously set forth.

In Fig. 7 the said pin 304 (there shown in dotted lines) is in the position it occupies when the camera is at rest after having completed a cycle of functioning movements. As the motor is started, thereby turning the worm gear 282 in a clockwise direction viewing Fig. 7, the pin 304 will be moved in a clockwise direction, and it causes the operating lever or link 305 to be turned in a contraclockwise direction by reason of the cam formation 306, the upper end of which formation is of such shape as to cause a dwell in the operating movement of lever or link 305, so as to allow the shutter curtain to run down as the worm gear 282 continues to rotate in the exposure cycle of the camera. During such dwell the capping gates 132, 133 are held open. When the pin 304 reaches the upper end of the cam formation 306, the master shutter release lever 150 (Fig. 2) will be returned to.its starting position in the manner previously set forth, thus closing said capping gates 132, 133 and allowing the idler gear 166 (Fig. 2) to mesh with the shutter rewind gear 165. The shutter curtain 129 will therefore now be rewound and an unexposed area of the sensitized material 120 will be moved before the exposure aperture. The said interrupted gear 273 makes one complete revolution per cycle and is then stopped by the act of breaking the electrical circuit to the driving motor 49. The manner of controlling the said circuit will now be described, Referring particularly to Figs. 7 and 8, on the motor drive unit mechanism, housing or box 25 is the switch box 30 (previously referred to) and enclosed therein is a single-pole double-throw switch 311 attached to the said switch box 30 by screws 312, 312. The said switch 311 is of itself a standard switch of well known manufacture, and per se is therefore not a novel element in the present invention. It will, however, be specifically described and, as will appear, the said switch combines in a novel manner with operating parts herein disclosed in carrying out the purposes of the present invention, and is an element of novel combinations herein disclosed.

. Attached to the base of the said switch 311 is a flat actuating spring 313 and a contact spring 314, and connecting said two springs is a semicircular spring 315. The contact spring 314 is caused to be moved between contacts 316 and 317 lo (shown in Figs. 7 and 8) when the switch 311 is operated. The contact spring 314 carries a contact 318. When a switch plug 319 therein shown is moved in a left-hand direction, viewing Fig. 7, the spring 314 is also moved in a left-hand direc1i tion, carrying with it the semicircular spring 315 until the end of the spring 313 passes the spring 314, which is provided with an opening for that purpose, thus changing the position of spring 315 so that a center line would be projected through zo the end of the spring 313 and spring 314 at the point at which the said semicircular spring 315 is connected. At this time the actuating spring 313 will be moved to the left of contact spring 314 and at the same instant said contact spring 314 2, will be caused to be moved to the right under the influence of spring 315, as most clearly shown in Fig. 8.

When pressure is released from the switch button 319 and the spring 313 is allowed to assume :3, the position shown in Fig. 7, the said contact spring 314 will be caused to be moved to the left by the action of the semicircular spring 315 in a manner that need not be more fully described.

Referring to Figs. 7 and 8, in order to operate the switch 311, we have provided as an important feature of the invention an operating rod 320 that passes through the wall of the motor drive unit, gear housing or box 25 and the wall of the switch box 30, and have provided on its left end an enlarged head 321 for engaging with a spring 322, the purpose whereof is to cause said switch actuating rod 320 to follow the contour of the cam plate 291. As the said rod 320 is moved to the left, the switch operating button 319 is consequently moved to the left, causing the contact arm of the switch 311 to be moved to the right, as shown in Fig. 8.

The cam plate 291 is provided with a cut-away section or indentation 323 (most clearly shown in Fig. 7) to allow the rod 320 to move to the right when the said indentation is in alignment with said rod. In Fig. 7, the said interrupted gear 273 has made a complete revolution and the said cam indentation 323 has reached the position shown in Fig. 7, thus allowing the switch to be operated, thereby opening the electrical circuit to the motor and causing the camera to be stopped in this position, meaning that all functioning movements cease until a new cycle begins.

The camera mechanism will therefore be in the condition shown in Fig. 2, the capping gates 132, 133 being closed, the shutter curtain 129 being rewound and the take-up spool 125 being in the stopped position.

If now the circuit be completed between the contact spring 314 and the contact 316 by means of a second switch, the motor will again be set in operation to begin a new cycle, turning the interrupted gear 273 in a clockwise direction, and as soon as the indentation 323 of the cam plate 291 passes the push rod 320, the switch 311 will be operated and will be in the condition shown in Fig. 8. The auxiliary circuit just referred to can now be broken, but the camera will continue to operate until the indentation 323.

again reaches the push rod 324 when the cycle will have been completed. It will, be understood from the foregqing that the interrupted gear 273 will have made a complete cycle to cause the functioning parts to operate, by first operating the capping gates 132, 133 through the action of the pin 304 moving the link 305 and operating the master shutter release lever 1450. The said capping- gates 132, 133: will during such cycle, be opened and the idler gear 166 will- be disengaged from the shutter rewind. gear 1;65 (Fig. 2) and the shutter latch or subsidiary release lever 193 will be moved upwardly, thereby disengaging the dog 198 from the notch 192 of the shutter release cam 191 and the shutter curtain 129 will run down during such cycle.

The interrupted gear 272 has not yet, operated but when the teeth of the interrupted gear 273 reach the teeth of the gear 272, such latter gear will turn through 180q. However, before the teeth of interrupted gear 273. reach the teeth of interrupted gear 272, the pin 304 (Fig. 6) will hav, left the cam face 3086 of the shutter operating link 305, allowing the capping gates 132, 133 to: close and again engage the teeth of gear 16, with the teeth of the shutter rewind gear IS5.

When said interrupted gear 272 has turned through such one-half revolution, the interrupted portion, of gear 273 will have reached the position of the cut-away teeth on gear 272.

The cycle is now completed, and interrupted gear 272 will now cease from turning in either direction- until interrupted gear, 273 makes another cycle.

Referring now to Figs, 7 and 8, the switch 31 1 is provided with conductors leading through: the camera housing wall- as follows. Contact 317 is provided: with a conductor 387, contact 3-16 is provided with a conductor 388, and switch contact arm 314 is provided with a conductor 389.

To conduct the circuit through the camera body 20 and yet provide ready means for disconnecting or removing the motor drive from the camera, we provide suitable binding posts, one for each of the conductors 387, 388 and 389, unnecessary further to refer to.

The condition of the camera mechanism at the time of closing contacts will be that indicated in Fig. 2. The shutter curtain 129, therefore has been rewound, a new area of film has been fed into position and the camera will have stopped, the motor drive mechanism being in the condition shown in Fig. 7. As contact is made through the main controlling switch, the motor will start to operate, turning the worm 295 and the worm gear 282, interrupted gear 273, cam plate 291 and pin 304. As worm gear 282 continues to turn, the switch operating rod 320 will be caused to move to the left, viewing Figs. 7 and 8, thus closing contacts 316 and 318. The circuits can now be interrupted by the main controlling switch, since contacts 316 and 318 will short circuit said controlling switch, thus allowing the motor to operate continually until the circuit is broken by contacts 318. and 318 or by a gate controlling switch, which does not function during the day cycle. Therefore, the camera will continue to operate, and the pin 304 operates the shutter operating link 305 and the master shutter release lever I58, thus opening the camera capping gates 132, 133, and at this time the shutter will also be released.

At the time the shutter curtain 129 is released, the interrupted portion of said gear 273 will be in mesh with cut-away teeth of the gear 272, but the camera, mechanism has: not, yet started to, operate. A continuance of rotation, of said_ gear 273 will allow the capping gates 132, 133 to close.

Shortly thereafter the teeth of said interrupted gear 273 then engage teeth of gear, 272 causing said gear 212 to be turned, operating the camera mechanism so as to rewind the shutter curtain 129 and feed a new area of film into position for the next exposure. Said worm gear 282 will continue to operate until the cut-away portion 323. of the cam plate 291 reaches the switch operating rod 320. The circuit between contacts. 318 and 316 will then be broken, thus stopping the motor and causing the camera also to be. stopped, and the mechanism will now again be in position shown in Figs. 2 and 7.

The lever 150 corresponds to the so-called trigger or shutter release lever 40 of the said- copending application Ser. No. 437,240, and therefore herein it is termed the master shutter-re-. lease lever. In the present application the said master shutter-release lever 150 is operated through the motor-drive unit 44 to 49. We have also disclosed herein the lever 159 which, to distinguish it from the master shutter-release lever 150, we have herein termed the secondary shutter release lever, it acting to release the shutter when the capping gates 132, 133 approach their full-open position. The said secondary shutterrelease lever 159 is operatively connected, as clearly shown in the drawings, to the said master shutter-release lever 150 that is operated by the said motor-drive unit.

In the specification, we have referred to the camera, because of the herein disclosed shutter construction, as one adapted for use as a daytime camera, and also adapted for use in night photography, at which time the subject to be photographed would be illuminated as known to those skilled in the art, by flash bombs or other illumination under the control of the personnel in the aeroplane or by automatic control provided'in the camera but not herein disclosed.

The term "night photography" has come into general use in aeroplanes, and it is well understood what is meant by such term. We have, therefore, used the expression "night photography" in that sense herein.

Having thus described one embodiment of the invention, it is to be understood that although specific terms are employed, they are used in a generic and descriptive sense and not for purposes of limitation, the scope of the invention being set forth in the following terms.

We claim: 1. lotor actuated cycling means for corelated focal-plane shutter-curtain release means and pivoted, swinging capping-gate controlling means, all pertaining to photographic shutter mechanism, including, in combination; a camera casing, a focal plane shutter curtain 129 in said casing, an electric motor supported adjacent but exterior to said camera casing, a worm 295 supported in the camera casing and operatively connected to and driven by said motor, a worm gear 202 in said casing meshing with and driven by said worm, a gear 213 driven by said worm gear, a cam plate 29 , said gear 273 and said cam plate being co-axial and carried by said worm gear, said cam plate having a pin 304 extending from a lateral face thereof, a lever 305 pivotally mounted in the camera casing in position to be engaged and moved by said pin 304, said lever 30:5 having a protruding pin 3.05a, a master shutter release lever 150 mounted in the camera casing and having a formation engaged by said pin 305a, the proportioning and timing of said parts being such that one revolution of said gear 273 causes said lever 305 to operate the said master release lever 150; capping gates 132, 133 pivotally mounted for opening and closing swinging movement in the camera casing in close proximity to and in parallelism, when closed, with the said focal plane shutter curtain 129, operating links 152a and 155 extending from said capping gates respectively, a pin 158 operatively connected to the said link of the capping gate 133, an actuating disk 147 carrying said pin 158, and a gear 148 operatively connected to and adapted to move said links 152a and 155 to open and close said capping gates, a gear 149 meshing with gear 148 and carrying the said master shutter release lever 150, a secondary shutter release lever 159, a shaft 202 whereon said secondary release lever is mounted for releasing the said shutter curtain 129 and permitting it to run down when the said capping gates approach in their swinging movement full-open position and having a formation to engage the said pin 158, a shutter rewind gear 165 having a shutter release cam plate 191 fast therewith in a substantially concentric relation thereto, a subsidiary shutter release lever 193 having a formation to engage said shutter release cam plate 191, a lever 204 mounted on said shaft 202 and a gear-releasing link 208 operated by the said lever 204 and acting through the described connections to operate the subsidiary release lever 193, thereby releasing the shutter curtain 129 and thus permitting it to run down.

2. Motor actuated cycling means for co-related focal-plane shutter-curtain release means and pivoted, swinging capping-gate controlling means, all pertaining to photographic shutter mechanism, including, in combination: a camera casing, a focal plane shutter curtain in said casing, an electric motor, a worm 295 in the camera casing operatively connected to said motor, a worm gear 282 in said casing and meshing with and driven by worm 295, a cam plate 291 coaxial with and carried by said worm gear 282 and having a pin 304 laterally extending therefrom, a lever 305 pivoted in said camera casing and adapted to be engaged and moved by said pin 304, a master shutter release lever 150 in the camera casing and having a formation to be engaged by said lever 305, capping gates 132, 133 pivoted in the camera casing close to and parallel, when closed, with said shutter curtain, means to open and to close said capping gates in timed relation to the movement of the shutter release lever 150, a shutter rewind gear 105 in the camera casing, a shutter release cam plate 191 fast with said shuter rewind gear 165, a subsidiary shutter release lever 193 engaging said cam plate 191 and a lever 208 moved by movement of said master shuter release lever 150 to release the shutter curtain by withdrawing said release lever 193 from the cam plate 191.

3. Motor actuated cycling means for co-related focal-plan shutter-curtain release means and pivoted, swinging capping-gate controlling means, all pertaining to photographic shutter mechanism, including, in combination: a camera casing, a focal plane shutter curtain 129 in said casing, an electric motor, a worm 295 in the 7 camera casing operatively connected to said motor, a worm gear 282 in said casing and meshing with and driven by worm 295, a cam plate 291 carried by said worm gear 282 and having a pin 304 extending laterally therefrom, a lever 7 305 pivoted in the camera casing and adapted to be engaged and moved by said pin 304, a master shutter release lever 150 in the camera casing and having a formation to be engaged by said lever 305, capping gates 132, 133 pivoted in the camera casing close to and parallel, when closed, with the shutter curtain 129, operating links 152a and 155 extending from said capping gates, means to operate said links to open and close said calpping gates and including a gear 149 carrying said release lever 150, a shutter rewind gear 165, a shutter release cam plate 191 concentric and fast with said shuter rewind gear 165, a subsidiary shutter release lever 193 engaging the cam plate 191, and shutter rewind gear releasing means 208 moved by movement of said master shutter release lever 150 to release the shutter curtain 129 by withdrawing said release lever 193 from said cam plate 191.

4. Motor actuated cycling means for co-related focal-plane shutter-curtain release means and pivoted, swinging capping-gate controlling means, all pertaining to photographic shutter mechanism, including, in combination: a camera casing, a focal plane shutter curtain 129 in said casing, an electric motor, a worm 295 in the camera casing operatively connected to said motor, a worm gear 282 in said casing and meshing with and driven by worm 295, a cam plate 291 carried by said worm gear 282 and having a pin 304 extending laterally therefrom, a lever 305 pivoted in the camera casing and adapted to be engaged and moved by said pin 304, a master shutter release lever 150 in the camera casing and having a formation to be engaged by said lever 305, capping gates 132, 133 pivoted in the camera casing close to and parallel, when closed, with the shutter curtain 129, a gear 149 operatively connected with said capping gates to operate them and carrying the said release lever 150, a shutter rewind gear 165, a shutter release cam plate 191 fast with said gear 165, a subsidiary shutter release lever 193 engaging said cam plate 191 and shutter rewind gear releasing means 208 4t moved by movement of said master shutter release lever 150 to release the shutter curtain 129 by withdrawing said release lever 193 from said cam plate 191.

5. Motor actuated cycling means for co-related 5( focal-plane shutter-curtain release means and pivoted, swinging capping-gate controlling means, all pertaining to photographic shutter mechanism, including, in combination: a camera casing, a focal plane shutter curtain 129 in said cas5 ing, an electric motor, a cam plate 291 operatively connected to and turned by said motor, said cam plate having a pin 304 extending laterally therefrom, a lever 305 pivoted in the camera casing and adapted to be engaged and moved by said pin 304, a master shutter release lever 150 in the camera casing and having a formation to be engaged by said lever 305, capping gates 132, 133 pivoted in the camera casing close to and parallel, when closed, with the shutter curtain 129, operating links 152a and 155 extending from said capping gates, means to operate said links including a gear 148 and a gear 149 meshing therewith and carrying said release lever 150, a shutter rewind gear 165, a shutter release cam '0 plate 191 concentric and fast with said shutter rewind gear 165, a subsidiary shutter release lever 193 engaging said cam plate 191, a lever 204 operatively connected to said gears 148 and 149, a shaft 202 whereon said lever 204 is mounted, 5 and shutter rewind gear releasing means 208 :moved by movement of said master shutter release lever 150 through -said lever 204 to release the shutter-curtain 129 by withdrawing said release lever ;93 from said cam plate 191.

6. A combination in accordance with claim 2, but wherein, driven by said motor for the purpose of rewinding the focal plane shutter and operating the master shutter-release lever in timed relation-to the closing of the capping gates, there -are provided a pair of adjacent meshing gears 272, 273 -and a master gear l77 :driven by said gears 272, 273 and in driving relation with the said shutter rewind gear :165, said gear 272 hav:ing interrupted teeth at diametrically opposite points and said gear 273 ,being devoid of teeth *throughout substantially one-half its periphery whereby said master gear 177 is driven intermittently from said motor even when the latter is continuously driven.

7. A combination in accordance with claim 2, but wherein a lengthwise -movable pin 320 is mounted in the camera casing and is engaged by and periodically operated ;by said cam plate '291 as the latter is turned by said motor through the said worm and worm gear, and a motorcontrolling electric switch 311 is adapted to be moved by the said pin 320 for stopping said motor.

8. A combination in accordance with claim 2, but wherein there is provided -between the electric motor and the shutter curtain release means, 'for the purpose of rewinding-the shutter curtain and operating the release means therefor, operative connections including a main drive or master gear '7-7 in driving relation with the said shutter rewind gear 165, and a pair of meshing gears :212, 273 in train with said master gear '177, the gear 272 having interrupted teeth at two diametrically opposite points and the:gear 273 being devoid of teeth throughout stibstantially onehalf its periphery, the proportioning of said parts being such that one revdlution of said gear 273 causes said lever 305 to operate the -master release lever 150 :once 4for releasing the shutter curtain.

9. A combination in accordance with claim 2, but wherein the lever 805 has a dwell-producing cam formation 306 shaped to cause a dwell in the operating movement of lever 305 during the running down -of the shutter curtain, so as to Allow the said shutter curtain -to run down as the worm gear 282 continues to rotate in the exposure cycle of the camera, and during which dwell resulting from said cam formation the capping gates 132, 133 are held open to permit photographic exposure.

10. A combination in accordance with claim 2, but wherein the shutter release cam plate 181 has a peripheral notch 192 and the subsidiary shutter release lever 193 has a dog-like projection 1:98 to engage said-notch, thereby to 'hold said cam plate :191, but so that when said lever .193 and notch :12 are disengaged, the shutter curtain 129 will be allowed to run down, thereby effecting an exposure.

11. A ýcombination in accordance with claim 2, but 1wherein, driven. by :said -motor and for the purpose of rewinding the focal plane shutter and operating the :master .shutter release lever in timed xrelation to the closing -of the capping gates, there is -provided a gear 272 having teeth diametrically opposite each :other cut away, and wherein there is a gear 273 having an interrupted face throughout one-half its periphery to -fit the cut-away teeth of gear 272, said gear 272 being thereby driven intermittently by: said gear :213, aid wherein therelis a driving ratchet member 278 connected by-its shaft to said gear 273 :and a pawl 287 mounted on-the said worm gear 1 282 and engaging said ratchet gear.

12. A combination in accordance with claim 2, but wherein, driven by said motor and for the ;purpose of rewinding the focal plane shutter and operating the master shutter release lever in timed relation to the closing of the capping gates, .and in order to provide.intermittent motion from the electric motor, there is provided a gear 272 having:a short series of teeth cut away opposite each .other and an interrupted gear 273 provided 2 with teeth.on only :one-half:its 1periphery, so that 'the cut-away teeth of gear 272 fit the interrupted face of:gear:i23, and wherein the worm gear 282 :is provided with a pawl 287 and a driving ratchet member -or wheel:278 is engaged -by said pawl rand is fast with-gear:213.

13. Motor -actuated cycling means for corelated focal-plane -shutter-curtain release means, including, in combination, a camera casting, a focal plane shutter curtain 129 in said casing, an electric motor supported :adjacent but -exterior to:said camera casing, a worm 295 supported.in the camera casing and operatively connected to and driven by said motor, a worm gear 282 in said casing and:meshing with and driven by said worm 295, a main drive or master gear 1177 for -rewinding the :said shutter curtain, a pair of meshing gears 212, 273 :in train with said master gear 177, said ýgear 272 having interrupted teeth at two diametrically opposite points of its periphery and said gear 213 being devoid of teeth throughout substantially one-half of its periphery, a -cam plate 291 co-axial with the said worm gear 282 and with said gear 273 and turning therewith, a lever 3:5 pivoted in the camera casing in position to be periodically swung upon its -pivot by said cam plate 291 in the turning movement of the latter, a master shutter .release lever 159 in the camera casing positioned to be moved by the movement of said lever 305, the construction and relation of the said parts being such that one revolution of the said gear 273 causes said lever 305 to operate the master shutter release lever 150 for releasing the shutter curtain, a shutter rewind gear 165 in a driving relation with the main drive or master gear 17I, a shutter release cam plate 191 concentric and fast with said gear 165, and a lever 193 having means to engage and hold said cam plate 191 and said shutter rewind gear 165 from rotative movement, and operative connections between said master shutter release lever 150 and said holding lever 193 to cause each shutter releasing movement of * said release lever 150, through said operative connections, to withdraw said lever 1.93 from the iS shutter release cam plate 191 and permit the shutter curtain to run down.

ARCHIE H. GOREY.

LOUIS D. NADEL.

REYNOLD J. NITSCH.