Title:
Stereopticon slide
United States Patent 2166335


Abstract:
My invention relates to stereopticon slides. The object of my invention is to provide a stereopticon slide comprising a rotatable disc of glass or other suitable transparent material on which is printed opaque characters such as letters, figures or symbols arranged in a circle; and mounted...



Inventors:
Murray, Banner
Application Number:
US12782337A
Publication Date:
07/18/1939
Filing Date:
02/26/1937
Assignee:
Murray, Banner
Primary Class:
Other Classes:
40/701, 116/223, 116/246, 353/62, D11/116
International Classes:
G02B27/22
View Patent Images:



Description:

My invention relates to stereopticon slides.

The object of my invention is to provide a stereopticon slide comprising a rotatable disc of glass or other suitable transparent material on which is printed opaque characters such as letters, figures or symbols arranged in a circle; and mounted in a frame of glass, the arrangement being such that light rays may be projected thru the d4sc and frame which supports the disc in the act of projecting the characters on a screen.

A further feature of my invention is the use of a stationary pointer to identify the nearest character thereto when the disc is in a position of rest.

I1 My device may be used for playing games and is adapted for use in moving picture theatres.

For instance, it may be intended to give a free ticket to the holder of a "lucky number" such number to be determined by operation of the device, after giving patrons of the theatre cards with numbers printed thereon, each card having a different number.

By determining the winning number before the audience by use of the device, no question can be raised as to the right winner.

The device is adapted to be placed in the usual slide holder of a stereopticon and all of the characters are projected on the screen simultaneously.

It has been customary to make slides of this ,V0 character with a stationary disc or dial and a rotating pointer to indicate a character on the dial when it is in a position of rest.

Such a construction requires a counterbalance for the pointer to insure its even movement in spinning, and often the counterbalance extends in a line with the pointer directly across the dial so that to a person with poor sight, either end might appear as the pointer end, thus causing confusion as to number selected.

By rotating the dial instead of the pointer, no one is misled as to the number resting nearest to the pointer's end, and the dial may be perfectly balanced without difficulty.

Referring to the drawing which forms a part of this specification, Fig. 1 is a face view of the slide, part of the front glass plate being removed to disclose the arrangement of the glass dials or discs mounted in the frame.

Fig. 1A is a front elevational view of the dial portion and pointer.

Fig. 2 is a perspective view of the frame and disc portions shown in separated relation.

Fig. 3 is a vertical sectional side view looking &g in the direction indicated by the arrows in Fig. 1.

Fig. 4 is a vertical sectional side view of the pivotal portions shown in assembled relation.

Fig. 5 is a side view of the pivotal bearings comprising their respective flanges by means of which the discs are supported in operative position by the frame portion of the device.

10 indicates the front plate which serves as the supporting element for the dial and disc portions I I and 12 respectively, and 13 indicates an opaque frame which braces the front plate and renders its portions outside of the circle 14 impervious to light rays.

The plate 13 is cemented to the front plate and the discs 11 and 12 are held together at their outer edges by a cylindrical ring of thin metal 15 which is spun over their outer edges as illustrated.

The front plate 10 is provided with an aperture 16 in which is closely fitted a cylindrical bushing 17 having a flange 17' which rests against its outer surface as illustrated.

A pointer 18 is suspended from the cylinder 17 and rests against the rear side of the plate 10, and a cylindrical plug 19 fits in the bushing 17 with its flange 19' pressed against the pointer to hold it in firm relation with the plate 10.

Formed integral with the plug 19 is a cylindrical bearing 20 on which is mounted the hub portions comprising the cylinder 21 with its flange 21' and cylinder 22 with its flange portion 22' and washer 23.

The disc 12 and dial 11 are each provided with an aperture 12' and 1' respectively, thru which the cylinder 21 projects, the disc and dial being held firmly between the flanges 21' and 22' while the cylinders 21 and 22 are fitted in close frictional relation and are freely rotatable on the bearing 20 between the flange 19' and the washer 23 Secured to the outer end of the plug 19 on the extension 24. It will be understood that the disc and dial are made of thin glass and that the parts comprising the frame are very narrow to permit the slide as a whole to fit within the stapdard holder forming a part of the projection apparatus. The opaque portion of the frame indicated by 13 is formed with an opening in its top to provide a space 13' to permit the dial and disc to extend above the frame so that the dial may be manually rotated, and also that the characters carried by the dial are located between the disc and dial plate where they are protected from contact with the hand in handling the slide and from abrasion in operation and in shipping etc.

The hand of the pointer is made very thin so S5 that no shadow will be cast on the dial and magnified on the screen in the act of using the device.

It will also be noted that by reason of the pointer being stationary, it need not necessarily be suspended from the hub of the wheel but could. be placed in any desired position on the inner or outer side of the front plate I1 so long as the pointer intersects the circular line of travel of the dial to indicate a character when the dial is at rest.

10 Al of the parts being made of durable material insures good service.

Having thus described my invention I claim as new: 1. A stereopticon slide of the character de16 scribed comprising an opaque frame formed with a circular opening which extends thru the upper side of the frame, a plate of transparent material carried by said frame, means carried by said plate for supporting a pair of discs, a pair of S0 discs rotatably mounted on said means one of which comprises a dial located between them, means for holding said discs together so that they may be rotated in unison, said discs extending thru said circular opening in the upper side of 2 the frame to permit them to be manually rotated, and means for indicating a character on the dial when it is at rest.

2. A stereopticon slide of the character described comprising an opaque frame formed with 30 an opening which extends thru the upper side thereof, a plate of transparent material overlying said frame and secured thereto, said plate having a central aperture, two thin discs of transparent material located in and extending thru the upper side of said opening one of which comprises a dial and each of which is provided with a central aperture, and means carried by said plate and extending thru said apertures to support said discs in rotatable relation.

3. The construction defined in claim 2, together with; and a metal band encircling the periphery of said discs.

4. A stereopticon slide of the character described comprising an opaque frame formed with a central opening which extends thru the upper side thereof, a plate of transparent material extending over the face of the frame and secured thereto, a pair of transparent discs rotatably mounted in said opening in the frame and extending thereabove one of which comprises a dial located between them, means for holding said discs in close contact with each other, and a stationary pointer located adjacent the dial to indicate a 0g symbol thereof when the dial is at rest.

5. A stereopticon slide of the character described comprising an opaque frame formed with a circular opening which extends thru the upper side of the frame, a plate of transparent material carried by the frame, means carried by said plate for supporting a pair of discs extending above the frame and a pair of discs rotatably mounted on said means one of which discs comprises a dial located between them, means for holding o3 said discs together to insure their rotation in unison, and means for indicating a character on the dial when it is at rest.

MURRAY BANNER.