Title:
Shade roller plunger trunnion
United States Patent 2106073


Abstract:
This invention relates to winding rollers for shades or curtains at the windows of buildings or closed vehicles, such as automobiles, busses, railway coaches, etc., wherein the trunnions and/or the bearings or brackets which support the trunnions at the opposite ends of the shade rollers are...



Inventors:
Stuber, Walter J.
Application Number:
US75036034A
Publication Date:
01/18/1938
Filing Date:
10/27/1934
Assignee:
MCFALL CO CAREY
Primary Class:
International Classes:
E06B9/46
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Description:

This invention relates to winding rollers for shades or curtains at the windows of buildings or closed vehicles, such as automobiles, busses, railway coaches, etc., wherein the trunnions and/or the bearings or brackets which support the trunnions at the opposite ends of the shade rollers are inaccessible when the curtains are hanging in place at the windows.

The object of the present invention is to provide a trunnion construction for at least one end of a shade roller whereby the normally projecting end of the trunnion may be retracted to a position substantially flush with the end of the roller, to permit the freed end of the roller to be swung out of operating position for allowing the trunnion at the opposite end of the roller to be readily withdrawn from its support.

Another object of the invention is to mount the retractable trunnion in the end of the roller in such a manner that retraction thereof may be readily accomplished by a slender instrument inserted into an opening formed in the barrel of the roller adjacent the one end thereof.

The construction and operation of the device will be readily understood upon referring to the accompanying drawing, of which: Fig. 1 illustrates, in longitudinal sectional elevation, one end of a shade roller in which the spring-pressed trunnion is mounted; Fig. 2 is a transverse sectional elevation taken on the line 2-2, Fig. 1; Fig. 3 is a perspective view of the assembled roller end-bung and trunnion prior to insertion of the assemblage into the end of the curtain roller; Fig. 4 is a sectional plan view taken on the line 4-4, Fig. 2; and Fig. 5 illustrates the trunnion in its retracted position.

The curtain roller 1, in the present instance, is of the hollow, barrel type composed of sheet metal rolled into tubular form and seamed as at 2 longitudinally thereof. Diametrically opposite and parallel to the seam 2 is a grooved or otherwise recessed rib 3 for receiving the one end of the curtain.

The one end of the roller (not shown) is normally provided with the usual form of fixed trunnion or spindle to one end of which is secured one end of the roller-operating spring (not shown), the opposite end of said spring being anchored in any suitable manner to the body or barrel of the roller. In said end of the roller is provided a transversely extending plate which has rotary bearing on the fixed trunnion and carries s5 a pair of pawls arranged to engage a ratchet on the fixed trunnion for holding the curtain roller in an adjusted position against the action of the winding spring.

The opposite end of the roller, i. e. the one which is illustrated in the drawing, normally is provided wth a circular trunnion rigidly mounted in the end of the roller and arranged to rotate in the roller-supporting bracket or other support disposed adjacent said end of the roller, the fixed trunnion being mounted in a corresponding support having a slotted opening for non-rotatably supporting the flattened end of the trunnion in the usual manner.

In ordinary cases these brackets which support the roller trunnions are exposed so that the circular trunnion in the one end of the roller may be mounted in the one bracket having the circular bearing opening after which the opposite end of the roller with the spring-anchoring trunnion may be set in place, with the flat or rectangular end of the spring-anchoring trunnion placed in the slotted opening of the adjacent bracket. In the newer designs of automobiles the brackets are or will be concealed or flush with those portions of the window frame adjacent which the opposite side edges of the curtains are disposed, in view of which the normally rigid trunnion at the one end of the roller must be made movable in order to install or remove the shade at or from the window. . In mounting the curtain, the spring-anchoring trunnion is first slipped into a rectangular opening formed in a bearing inset into the frame of the window to be screened by the curtain. The opposite end of the curtain is then moved into position to line up the second trunnion with its bearing opening in the opposite side of the window frame.

In order to accomplish the setting and removal of the round trunnion in and from its bearing opening in the one side of the frame, the plunger trunnion illustrated in the drawing has been provided. The trunnion comprises a spring-pressed trunnion 5 which is axially aligned with the roller I and has an outer portion 6 which extends beyond the end 7 of the roller, and is suitably mounted in a bearing 4 which is inset and flush with the surface a of the window frame A.

The trunnion 5 is slidably mounted at 8 and 9 in the end walls 10 and II respectively of the roller end-bung 12 and is provided with an integral collar or pair of collars 13 which in turn is provided with or forms a circumferential groove 14 on the trunnion 5 adjacent the plate 10.

Encircling the inner main portion 15 of the trunnion 5, between the inner side of the collar 13 and the end wail 1i of the bung I, is a spring 16 which normally maintains the outer end 6 of the trunnion 5 in a projected position.

In mounting the curtain roller in the window frame A, the outer end 6 of the trunnion 5 is slid along the surface a of the window frame and moves inwardly of the roller I until the trunnion 5 is aligned with the circular opening in the bearing 4 in which it is to be mounted, whereupon the spring 16 projects the end 6 of the trunnion 5 into the bearing opening of the frame.

In order to remove the roller from the frame, it is necessary to retract the trunnion 5 and for this purpose the roller barrel I and the bung 12 are provided with aligned openings 17 and 18 respectively, through which a releasing tool 20 may be inserted. The inner end 19 of the tool 20 entering the groove 14 of the collar 13 will, as the tool is swung from position shown in Fig. 1 to the position shown in Fig. 5, retract the end S of the trunnion 5 from the bearing opening in the window frame to a position substantially flush with the end 7 of the roller, whereupon this end of the roller may be swung out and free of the window frame.

The bung is assembled as a unit prior to its being placed in the end of the roller I and consists of a stamping from sheet metal into the cup-like form illustrated in Fig. 3, wherein the end wall 1i and the side wall 21, which latter is of a generally cylindrical form, are integral. The end wall if is a separate plate, which after the trunnion 5 and spring N6 are placed within the cup 12, is inserted in the otherwise open end of the bung 12 and is brought to bear against a series of circumferentially spaced shoulders 22 pressed inwardly from the circular wall 21 of the bung, as clearly shown in Figs. 1, 3 and 5. In order to hold the end wall I in position the open end 23 of the side wall 21 of the bung 12 is crimped inwardly at diametrically opposed plates, as illustrated at 24, 24.

The side wall 2 I of the bung i2 is concaved longitudinally at diametrically opposite places providing grooves 25, 25 which fit around the seam 2 and curtain-receiving recessed groove 3, as clearly illustrated in Fig. 2.

In forming the grooves 25, 25, shoulders 26, 26 are formed at the ends of the grooves adjacent the end wall 10 of the bung, these shoulders 26 bearing against the ends of the seam 2 and groove rib 3 to prevent the bung from moving too far into the roller I.

In order to prevent the bung from slipping out of the end of the roller the side wall 21 of the bung 12 is apertured as at 27 and the side wall of the roller is perforated and pressed into- the bung opening 27, as illustrated at 23 in Fig. 1, thereby securing the bung against any and all axial or rotary movement relative to the roller 1.

I claim: 1. A shade roller having an axial opening and a transverse opening affording communication between the axial opening and the exterior of the roller, a retractable trunnion mounted, in the axial opening with one end projecting beyond an adjacent end of the roller, and means on said trunnion and wholly confined within said axial opening and engageable by a tool insertable through said transverse opening the side walls of which afford a pivotal bearing for said tool for effecting retraction of the projecting end of the trunnion.

2. A shade roller having an axial opening and a transverse opening affording communication between the axial opening and the exterior of the roller, a trunnion slidably mounted in the axial opening, and means on the trunnion and wholly confined within said axial opening and engageable by a tool insertable through said transverse opening the side walls of which afford a pivotal bearing for said tool for sliding the trunnion axially of the roller.

3. A shade roller having an axial opening and 0o transverse opening affording communication between the axial opening and the exterior of the roller, a trunnion slidably mounted in the axial opening with one end projecting beyond an adjacent end of the roller, means for resiliently maintaining the trunnion in said projecting relation to the roller, and means on said trunnion and wholly confined within said axial opening and engageable by a tool insertable through said transverse opening the side walls of which afford a pivotal bearing for said tool for effecting retraction of the projecting end of the trunnion.

4. A shade roller having an axial opening and a transverse opening affording communication between the axial opening and the exterior of the roller, a trunnion slidably mounted in the axial opening with one end projecting beyond an adjacent end of the roller, means for resiliently maintaining the trunnion in said projecting relation to the roller, and means wholly confined within said axial opening and affording a transverse shoulder on said trunnion engageable by a tool insertable through said transverse opening the side walls of which afford a pivotal bearing for said tool for effecting retraction of the projecting end of the trunnion.

5. A hollow ended shade roller, a pair of transversely extending plates in and spaced longitudinally of the hollow end of the roller, a trunnion operatively supported in said plates with one end projecting beyond the end of the roller, said hollow end of the roller having a transverse opening affording communication between the interior and the exterior of the roller, and means on the trunnion wholly confined within the hollow of the roller and engageable by a tool insertable through said opening the side walls of which afford a pivotal bearing for said tool for retracting the projected end of the trunnion.

6. A hollow ended shade roller, a preassembled 60 bung unit mounted in the hollow end of the shade roller and comprising a cylindrical body and a pair of transverse plates spaced longitudinally thereof, a trunnion operatively supported in said plates with one end projecting beyond the end of the roller, said hollow end of the roller and said cylindrical body of said bung unit having aligned transverse openings affording communication between the interior of the bung and the exterior of the roller, and means on the trunnion intermediate said plates and wholly confined within the bung unit and engageable by a tool insertable through said aligned transverse openings the side walls of which afford a pivotal bearing for said tool for effecting retraction of the trunnion.

7. A hollow open ended shade roller comprising a substantially cylindrical wall having a rib extending longitudinally thereof, a preassembled hung unit comprising a cup-shaped element consisting of a substantially cylindrical body and an integral bottom plate at one end thereof, a second plate parallel to said bottom plate in spaced relation thereto, said bung unit being mounted in the. hollow end of the roller with the axes of the two 51 substantially coinciding, a trunnion operatively mounted in said plates with one end projecting beyond the end of the roller, said hollow end of the roller and the cylindrical body of the bung unit having aligned transversely extending openings affording communication between the interior of the bung unit and the exterior of the roller, and means on the trunnion engageable by a tool insertable through said aligned openings for retracting the trunnion, the cylindrical body of said bung cup having a longitudinal groove receiving said rib and a shoulder formed at the end of said groove adjacent said bottom plate and engaging the end of said rib to position the bung unit in the open end of the roller.

8. A hollow ended shade roller having a transverse opening therein, a pair of transverse plates spaced longitudinally of the roller, a trunnion slidably mounted in said plates with one end projected beyond the end of the roller, a spring encircling the trunnion intermediate the plates for projecting the trunnion outwardly of the roller, and means in the trunnion intermediate one end of the spring and the outermost of said plates affording an abutment for the spring, a stop for the trunnion wholly confined within the hollow of the roller and engageable with said outermost plate and a shoulder wholly confined within the hollow of the roller and engageable by a retract:; ing tool insertable through said transversely extending opening which is formed in the roller intermediate said plates the side walls of which afford a pivotal bearing for said tool.

9. A hollow ended shade roller, a pair of transS'. verse plates spaced longitudinally of the roller, a trunnion slidably mounted in said plates with one end projected beyond the end of the roller, a spring encircling the trunnion intermediate the plates for projecting the trunnion outwardly of the roller, and a circumferentially grooved collar on the trunnion intermediate one end of the spring and the outermost of said plates wholly confined within the hollow of the roller and affording an abutment for the spring, a stop for the ,, trunnion wholly confined within the hollow of the roller and engageable with said outermost plate and a shoulder wholly confined within the hollow of the roller and engageable by a retracting tool insertable through a transversely extending open5o ing formed in the roller intermediate said plates the side walls of which afford a pivotal bearing for said tool.

10. A bung unit comprising a cup-shaped element including a substantially cylindrical body wall and a transverse bottom plate integral therewith, a second plate parallel to and spaced from the bottom plate, shoulders formed in and from the body wall at opposite sides respectively of said second plate securing the plate in place, a trunnion slidably mounted in said plates, said body wall having a transverse side opening intermediate said plates, and means on the trunnion engageable by a tool insertable through said side opening for sliding the trunnion axially of the bung unit. 11. A bung unit comprising a cup-shaped element including a substantially cylindrical body wall and a transverse bottom plate integral therewith, a second plate parallel to and spaced from the bottom plate, shoulders formed in and from the body wall at opposite sides respectively of said second plate securing the plate in place, a trunnion slidably mounted in said plates, a spring encircling the trunnion intermediate said plates, said body wall having a transverse side opening intermediate said plates, and means on the trunnion intermediate the spring and one of said plates affording an abutment for the spring and engageable by a tool insertable through said side opening for sliding the trunnion axially of the bung unit against the action of the spring.

12. A bung unit comprising a cup-shaped element including a substantially cylindrical body wall and a transverse bottom plate integral therewith, a second plate parallel to and spaced from the bottom plate, shoulders formed in and from the body wall at opposite sides respectively of said second plate securing the plate in place, a trunnion slidably mounted in said plate, a spring encircling the trunnion intermediate said plates, said body wall having a transverse side opening intermediate said plates, a circumferentially grooved collar on the trunnion intermediate the spring and one of said plates affording an abutment for the spring, and a limit stop for the trunnion for engaging the second of said plates and engageable by a tool insertable through said side opening for sliding the trunnion axially of the bung unit against the action of the spring.

WALTER J. STUBER.