US2461756A

US2461756A - Disk picture projector

Info

Publication number: US2461756A
Application number: US583015A
Authority: US
Inventors: Ralph S Moore
Original assignee: Individual
Current assignee: Individual
Priority date: 1945-03-16
Filing date: 1945-03-16
Publication date: 1949-02-15
Anticipated expiration: 1966-02-15

Description

Feb. 15, 1949. s, MOORE 2,461,756

DISK PICTURE PROJECTOR Filed March 16, 1945 2 Sheets-Sheet l swam bow Fa/pfiifoone,

Feb. 15, 1949. Rs. MOORE DISK PICTURE PRQJECTOR 2 Sheets-Sheet 2 Filed March 16, 1945 Pa 40/? A5. ffaore,

Patented Feb. 15, 1949 UNITED STATES PATENT OFFICE DISK PICTURE PROJECTOR Ralph S. Moore, Visalia, Calif.

Application March 16, 1945, Serial No. 583,015

2 Claims. 1

The invention appertains to means for still picture projection, and has for one of its several objects to provide a means of arranging a sequence of still pictures, in either circular or spiral series, upon a transparent disc structure, for the projection of the pictures onto a viewing screen, in the order of the sequential arrangement thereof; the pictures being either photographed on a circular film to be incorporated in the disc structure, or to be separately photographed and mounted, either temporarily or permanently, on or in the disc structure; such picture discs having the advantages of being durable, easily handled, changed, and mailable, and not easily breakable, hence, capable of standing up over long periods of use, without loss of continuity because of broken film.

Another object of the invention has to do with the provision of a means especially designed to project the still pictures from the aforesaid disc structure, in the order of the sequential arrangement of the pictures, at a predetermined rate of speed; the machine being automatic in operation and provided with means for varying its speed to suit particular projection requirements.

With these and other objects and advantages in view, the invention resides in the certain new and useful combination, construction, and arrangement of parts, as will be hereinafter more fully described, set forth in the appended claims,

and illustrated in the accompanying drawings, in which:

Figure 1 is a vertical, longitudinal section, through the picture projection apparatus, in accordance with the invention;

Figure 2 is a vertical, transverse section, taken through the line 2-2 onFigure 1, looking in the direction of the arrows;

Figure 3 is a face view of the master control disc and of the intermittent feed sprocket therefor, the spindle mounting for the control disc and the operating shaft for the feed sprocket being shown in cross section;

Figure 4 is an enlarged, fragmentary, vertical, transverse section, taken through the line 4-4 on Figure 1, looking in the direction of the arrows; and

Figure 5 is a rear face view of a picture disc in abutted. operative relation, with the rear face of a modified form of master control disc.

Referring to the drawings in detail, and more particularly to Figures 2 and 5, a picture record disc, in accordance with the invention. is made up of a transparent disc I'D, which may be formed of glass or a plastic, having a series of related disc.

pictures l2 afiixed thereto, either temporarily or permanently, or it may take the form .of a circular film or sensitized disc, having the pictures printed thereon and, in either case, the pictures are arranged in either a spiral sequence, as shown in Figure 2, or a circular sequence, as shown in Figure 5.

For the purpose of projecting the pictures from interchangeable record discs of this kind, onto a suitable viewing surface or screen (not shown), I have provided an automatic projector, which is comprised in a substantially rectangular cabinet, having a bottom wall l4, side walls 16, a rear wall is, a front wall 20, and a top wall 22. Risin vertically within the cabinet, rearwardly of the transverse center thereof and centered between the side walls :6, is a supporting structure for the picture disc mounting and actuating mechanism, the same having a solid upper part 24 and spaced parallel lower parts 26; the latter acting as guides or rails for a slide member or carriage 28. Passing through the slide member 28, is a spindle 30, preferably in the form of a headed bolt, having its headed end spaced from the front side of the slide member and carrying a coiled spring 34, positioned thereon between a pair of washers 36 and 38, the washer 36 bearing against the bolt head and the washer 38 against the front face of the slide member, while its rearwardly directed end is screw threaded to receive a winged nut 32 and a washer 40.

Mounted on the spindle 30, immediately in rear of the slide member 28, is a rearwardly flanged hub 42, against the flanged end of which, a master control disc 46, of a transparent material, such as glass or the like, is abutted; the hub being secured on the spindle by means of a set screw 44, while the control disc is clamped between the hub and the washer 40, when the winged nut 32 is tightened. Prior to the engagement of the washer 40 and the winged nut 32 on the spindle 30, a picture record disc I0 is positioned on the latter, in abutted relation with the rear side of the control disc 46, and is clampp in that relation, when the washer 40 and the winged nut 32 are tightened in place on the spindle. To one side of the central opening to receive the spindle 30, the picture record disc 10 is provided with an aperture Illa, to be engaged on a guide pin 48, projecting rearwardly from the control disc, to the end that the first picture of a sequence on each record disc will always be at the starting point of rotation of the control The control disc 46, as shown in Figures 1 through 3, has its front side provided with a spiral flange 58, for use th a picture record disc I8 having the pictures I arranged thereon in a spiral sequence; the pict res registering with the space. between the convolutions of the spiral flange, when the two discs are in assembly on the spindle 38. In the modified form of control and picture record disc assembly, as shown in Figure 5, wherein'the pictures I2 are arranged in a circular sequence on the record disc I8, the control disc will have a circular flange 58', which will conform to the circle defined by the inner end edges of the several pictures, substantially as shown.

The picture record and control disc assembly is to be rotated by means of an intermittent sprocket 54, the teeth of which engage with apertures 82, formed in the flanges 58 or 58', as the sively into registry with the aperture 582. In order to dissipate heat from within the lamp compartment I88 and from the picture record disc I8, a fan H8 is keyed on the. rear end of the rotor shaft 84, of the motor M, within a housing II8. which is connected by a conduit I28 with the interior of the lamp compartment, through the bottom wall I I8, and with the interior of the cabmet, as at I22, through the lower portion of the case may be; the sprocket being keyed on the rear end of a shaft 56, that is journalled intermediate its ends in a bearing 58, mounted in the upper part 24, of the supporting structure 28.

The forward end of the shaft 56 is supported in a bearing member 88 and carries a cam element 82, having high points spaced apart proportionately with respect to the width of the individual pictures on a picture record disc. The cam element 82 is disposed in the path of movement of a lug 84, mounted on the rear side of a grooved pulley 88, which is keyed on a shaft 88, journalled in the upper end of a bearing bracket I8, rising from the bottom wall I4, of the cabinet. Mounted within the lower part of the bracket 18, is the housing I8, of a reduction gearing (not shown), having a shaft I6 projecting from its forward side and carrying a smaller grooved pulley I4, that is connected by an endless belt 12 to the pulley 68. Projecting rearwardly from the housing 18, is a shaft section 88, which is coupled, as at 82, to the rotor shaft 84, of an electric motor M.

Formed in the front wall 28, of the cabinet, is

an aperture 88 and, secured on the inner side of the wall, in line with the aperture, is a tubular member 88, in which'a lens tube including an objective lens system 98 is slidably supported; a

- projecting lens 82 being mounted in the front end of the latter. For the purpose of adjusting the lens 92, relatively to'the aperture 88, the tubular member 88 is provided with a longitudinally extending slot 84, in its lower side, and the lens tube 98, with a lug 96, depending through the slot. An adjusting screw 98 is mounted in the front wall I8, below the aperture 86 therein, and has its inner end in screw threaded engagementwith an opening formed in the lug 98. A framing device I88 is carried at the rear end of the tubular member 88, if desired, in order to impart to the projected pictures the advantages obtaining from its use.

Formed in the'upper part 24, of the supporting structure '28, is an aperture I82,which is disposed in line with projection aperture 86, in the front wall I8 of the cabinet, and also with a condenser lens I84, mounted in the verticalwall I88, of a lamp compartment I88. provided in the upper rear part of the cabinet; an electric lamp bulb H2 being supported on the bottom wall II8, of the compartment, and disposed in line with the condenser lens I84 and a reflector II4, mounted on the rear wall I4, of the cabinet, so that a beam of light from the lamp bulb H2 is projected by the condenser lens I84 through the path of movement of the pictures I2, on the record disc I8, when the latter and the control disc 48 are intermittently moved to bring the pictures succesvertical wall 888, so as to discharge an air stream against and upwardly of the rear side of the picture record and control disc assembly; discharge openings for the air being provided in the top wall 22, of the cabinet, as at I28, which open into the latter at both sides of the vertical wall 588, of the lamp compartment.

Mounted on the pulley 88, and projecting from the edge thereof, is a shutter I28, which, in the rotation of the pulley, cuts the light beam in its passage from the aperture I82, to and through the framing device and projecting lens assembly. During the major period of rotation of the pulley 66, in each revolution thereof, eachof the pictures I2, on the record disc III, are projected onto the viewing surface or screen, while a change from one picture to another, in the sequence of the arrangement of the same on the record disc, is effected during each blackout period of the light beam, by the shutter I28. This operation is accomplished by the synchronized relationship established between the operative parts, the record and control disc assembly remaining stationary during the major period of rotation of the pulley 68, through each revolution thereof, and turning through a distance equal to the width of a single picture, on the record disc I8, when the intermittent sprocket 54 is likewise turned by the movement imparted to the cam 82, by the mg 84,

on the inner side of the pulley 58, the motion of the cam being transmitted to the sprocket through the shaft 56. For the purposes of the instant invention, the cam 82 has been provided with four high points, so that it is given a quarter turn each time the lug 84 engages one of the high points, as a consequence Of which, the shaft 58 and the sprocket 54 are likewise given a quarter turn,

which distance of turn is equal to the width of a single picture I2. The number of pictures to be projected per minute is to be varied by a predetermined speed of rotation of the pulley 88 obtained from a regulation of the speed of operation of the motor M, which may be accomplished with any suitable means, e. g., a rheostat (not shown).

In the operation of the projector, as thus constructed and arranged, with a picture record disc I8 having the pictures I2 arranged thereon in a spiral sequence and a control disc 48 provided with a complemental spiral flange or track 58, the record and control disc assembly is to be removed from and replaced upon the spindle 38, by the removal and replacement of the winged nut 32 and the washer 44, when the slide member 28 is elevated on the guides or rails 28 to permit of the engagement of the teeth of the intermittent sprocket with the firstof the apertures 52 at the inner end of the flange or track; a sumcient clearance being provided at the upper ends ,of the guides or rails 26 to allow the slide member to be raised to a height that willpermit the flange or track 58 to be positioned above the intermittent sprocket 54 and thereafter lowered to cause the teeth of the latter to engage with the apertures 52. With the rotation of the record and 'control disc assembly, the slide member 28 automatiend of the flange or track 50, on the control disc 48, and the proper relationship between the record disc and the control disc is accurately established by the engagement of the guide pin 18, on the rear side of the control disc, with the aperture Ilia, in the record disc l0.

Without further description, it is thought to be obvious that I have provided an extremely simplified and inexpensive still picture record disc and projector system, of particular worth for general advertising purposes and the like, wherein the picture records can be manufactured, distributed, and/or sold, independently, such as phonograph records and the like, or they may be manufactured and sold in combination with the projector. The projector may be set so that it is automatic in operation for the projection of a given sequence of still pictures onto a viewing surface or screen.

Having thus fully described a preferred embodiment of my invention, it is to be understood that changes in design and in minor details of construction and arrangement of the parts thereof may be resorted to, provided such changes are within the limits defined by the scope of the appended claims.

What I claim is:

1. In a picture disc projector, the combination which comprises a projector housing having an intermediate partition, said partition having an opening and a light projecting aperture therein, a carriage slidably mounted in said partition opening for vertical movement therein, a picture disc havinga series of pictures arranged arcuately on the face thereof, a transparent master disc for supporting said picture disc in fac adjacency therewith, means for mounting said picture and master discs for unitary rotation on said carriage, said master disc having secured thereto an axially projecting arcuate flange conforming to the curvature of said arcuately arranged series of pictures and having a series of equally spaced apertures formed therein, a sprocket rotatably supported on said housing and having the teeth thereof arranged for coaction with said flange apertures, said sprocket being disposed beneath said flange in supporting relation therefor and arranged in predetermined spaced relation with respect to said light projecting aperture sufficient to position said series of pictures in registry therewith and to elevate said carriage in said partition variably in accordance with the curvature of the flange upon unitary rotation of said pictur and master discs as the sprocket rotates, a light source associated with said light projecting aperture, a condenser lens positioned between said light source and said picture disc, an objective lens system mounted in said housing in alignment with said light source, condenser lens, and light projecting aperture, a shutter element rotatably supported on the housing between said objective lens system and said light projecting aperture and arranged to prevent passage of light from said light source through said objective lens during a fractional portion of one complete revolution of the shutter, means for rotating the shutter at a predetermined speed, and intermittent driving connections between said shutter rotating means and said sprocket for causing predetermined intermittent rotary motion of the sprocket effective to advance said series of pietures successively into registry with said light projecting aperture during successive fractional movements of the shutter respectively.

2. In a' picture disc projector, the combination which comprises a projector housing having an intermediate partition, said partition having a slide receiving opening and a light projecting aperture therein, a carriage slidably mounted in said partition for vertical movement within said slide receiving opening therein, a transversely disposed pin carried by said carriage for rotation thereon, means for frictionally limiting free rotation of said pin on the carriage, a picture disc having a series of pictures arranged spirally on the face thereof, a transparent master disc for detachably supporting said picture disc in face adjacency with one face thereof, means for detachably and frictionally locking said picture and master discs on said pin for unitary rotation therewith, a complementary spiral flange secured to the other side of said master disc and arranged thereon with said series of spirally arranged pictures in registry with the spaces between the convolutions of the spiral flange when the picture disc is supported on the master disc, said flange having a series of equally spaced openings formed thereon, a sprocket rotatably supported on the projector housing beneath said flange in supporting relation thereto and in predetermined spaced relation with respect to said light projecting aperture sufficient to bring said series of pictures into registry therewith, the teeth of said sprocket engaging said apertures in the flange whereby said carriage is elevated variably in accordance with the curvature of the spiral flange as the flange is moved over the sprocket upon rotation thereof, a light source associated with said light projecting aperture, a condenser lens interposed between said light source and said light projecting aperture in alignment therewith, an adjustable objective len system supported on the projector housing in alignment with the light projecting aperture and said light source, a shutter element rotatably supported on the housing between said light projecting aperture and said objective lens system and arranged to prevent passage of light therethrou-gh from the light source during a fractional portion of one complete revolution of the shutter, means for circulating cooling air for said light source, means for rotating said shutter element and said air circulating means at predetermined speeds, and intermittent driving connections between said shutter rotating means and said sprocket for causing predetermined intermittent rotary motion thereof effective to advance said series of pictures successively into registry with said light projecting aperture during successive fractional movements of the shutter respectively.

RALPH S. MOORE.

REFERENCES CITED The following references are of record in the flle of this patent:

UNITED STATES PATENTS Number Name Date 661,515 Giel Nov. 13, 1900 973,003 Coughlin Oct. 18, 1910 1,096,873 Victor May 19, 1914 1,107,293 Grad et al. Aug. 18, 1914 1,208,573 Kitsee Dec. 12, 1916 1,254,239 Koella 'Jan. 22, 1918 (Other references on following page)