US1314604A - Moving-pictttbe-pbojecting machine - Google Patents

Description

M L. PARRET. MQVING PICTURE PRO-.IECTlNG MACHINE.

APPLICATION FILED MAY 26, 1917.

Patented Sept. 2,1919,

3 SHEETSSHEE T 2.

flue/03017 M. L. PARRET.

MOVING PICTURE PROJECTING MACHINE.

7 APPLICATION FILED MAYZG, 191T- 1,314=,604;. Patented Sept. 2, 1919.

' 3 SHEETSSHEET 3- liar/key MILTON L. PARRET, OF MARSHALLTOWN, IOWA.

MOVING-PICTURE-PROJ'ECTIN'G MACHINE.

Specification of Letters Patent.

Application filed May 26, 1917. Serial No. 171,318.

T 0 all whom it may concern:

Be it known that I, MILTON L. PARRET, a citizen of the United States, and resident of Marshalltown, in the county of Marshall and State of Iowa, have invented a certain new and useful Moving-Picture-Projecting Machine, of which the following is a specification.

My invention relates to projecting machines for moving pictures.

The object of my invention is to provide a moving picture projecting machine of very cheap and simple construction, employing a minimum of material and parts, whereby the machine may be made much smaller than the ordinary machines now in use, of less weight, and of less material.

A further object is to provide in such a machine, a frame or body having a feed sprocket and take up sprocket and intermittent mechanism, and to provide new and novel means for supporting said intermittent mechanism for varying the position thereof for insuring the proper centering of the pictures with relation to the light aperture.

Still a further object is to provide a new and eflicient intermittent feed mechanism.

Still a further object is to provide in such a machine a suitable drive and gearing connection for. running all of the operative part-s.

Still a further object is to provide such a device having parts especially arranged for operating the moving gearing mechanism in oil.

lVith these and other objects in view, my invention consists in the construction, arrangement and combination of the various parts of the device, whereby the objects contemplated are attained, as hereinafter more fully set forth, pointed out in my claims, and illustrated in the accompanying drawings, in which:

Figure 1 shows a side elevation of a moving picture projecting machine embodying my invention, showing the machine installed on a fralne. and illustrating the relative positions of the projecting machine, the lamp house and the feed and take up maga-- zines.

Fig. 2 shows a side elevation of the machine from the right side thereof.

Fig. 3 shows a vertical, sectional view through one of the film guiding sprockets, and tension device adjacent thereto.

main power shaft of the machine.

Fig. 4 shows a side elevation of the machine, taken from the left side, with the parts of the casing removed.

Fig. 5 shows a detail view of part of the framing mechanism.

Fig. 6 shows a detail View of part of the intermittent mechanism of the fly wheel.

Fig. 7 shows a horizontal, sectional view taken on the line 7-7 of F ig. 4.

In the accompanying drawings, I have used the reference numeral 10 to indicate generally a supporting stand or frame, having the movable platform 11 with the rear- Wardly projecting platform 12 which supports the lamp house 13. The lamp house forms no part of my present invention.

The platform 12 is pivotally supported at its sides at 14. I

Mounted on the frame 10 is a bracket 15 in which is mounted a screw 16 adapted to engage the projecting portion 12, as shown in Fig. 1. On the screw 16 is the hand wheel 17.

The screw 16 extends into the platform portion 12 and by screwing the screw 16 up and down, the platform may be tilted as desired for raising or lowering the picture on the screen. 1

Supported below the forward portion of the platform 11 is a take-up magazine or case 18.

Resting on the forward portion of the Patented Sept. 2, 1919.

platform 11 is a base 19 of the moving picture projecting machine.

Extending upwardly from the base 19 is a heavy metal frame or casing 20 for supporting the mechanism of the projecting machine.

Extended through the body of the frame or casing 20 is a transverse shaft 21, one end of which is designed to be provided with a crank, or gearing mechanism or other suitable mechanism. The shaft 21 forms the Spaced from the shaft 21 on the left-hand side of the frame 20 is a transverse shaft 23 on one end of which is a gear 24 in mesh with the gear 22. On the opposite side of the frame .120 from the'gear 24 is a frame 25 for the ens.

Mounted on the shaft 23 on the righthand side of the frame 20, is a light timer and breaker device comprising a flat plate 26 arranged substantially parallel with and adjacent to the frame. 20, as shown in Fig. 2, and having the opposite extensions 27.

On ,the outer ends of the extensions 27 are laterally projecting blades 28, which are slightly curved from side edge to side edge, as shown in Fig. On the opposite ends of the plate 26 are laterally projecting blades 29, similarly curved and of considerably greater width than the arms 28. The'blades 29 serve to shut off the light while the film is being moved from position for framing one picture, to position for framing another picture at the light aperture and the blades 28 form light breakers.

Mounted above and slightly rearwardly from the shaft 23 in the frame 20 is a transverse shaft 30, on one end of which is a gear 31, shown in Fig. 5, in mesh with-the gear 22. On the other end'of the shaft 30 is a feed sprocket 32 which may be of ordinary construction.

Projecting laterally from the frame 20 and extending rearwardly from the lens frame 25 is a light aperture frame 33.

Mounted for vertical sliding movement in guides 35 on the rear surface of the frame 33 is a fire shutter.

Rotatably mounted in the frame 20 rear-.

Wardly from the plate 26 is a shaft 37 upon one end of which is detachably fixed an arm ing the frame 20 is an opening 53 substan-.

tially triangular in outline, as shown in Fig. 5.

Extending into the opening 53 are frame and guide members 58 and 60.

Rotatably mounted in the frame 20 rear-' wardly of the shaft 21 is a shaft 56. The adjacent faces of the frame members 58 and are preferably curved on the arc of circles having their centers at the center of the shaft 56.

The frame and guide members 58 and 60 are yieldingly moved toward each other by springs 57 and 59. The springs 59 are preferably somewhat stronger than the springs 57 and serve to hold the pins 71 hereinafter mentioned, snugly against the balance wheel 72 on the shaft 56.

Slidably mounted between the guides 58 and 60 is a frame member 61, having opposite faces which engage said guide devices and curved to fit the faces of said guide devlces.

Secured to the frame member 61 on opposite sides thereof, are plates 62 extending considerably beyond the frame member 61 and overlapping the frame 20 at the edges of the opening 53 as clearly illustrated in Fig. 5.

Pivoted between its ends on the frame 20 is a lever 63, having a bifurcated end, between the arms 64 of which there extends a sleeve bearing 65 on the right-hand plate 62. It will be seen that by manipulating the handle end of the lever 63, the frame member 61 may be reeiprocated on the are of a circle having its center at the center of the shaft 56.

Extending through the plates 62 and the frame member 61 and the sleeve bearing 65 is a shaft 68, on the left-hand of which is mounted an intermittent sprocket 69.

On the opposite end of the shaft 68 is a three pointed intermittent device member 70 having laterally projecting pins 71,

shown by dotted lines in Fig. 6.

On the shaft 56 is a fly wheel 72, and also a gear 73 in mesh with the gear 22.

The intermittent device member 70 is so arranged and constructed that normally two of the pins 71 rest against the periphery of the fly wheel 72.

The fly wheel 72 is provided at one point in its periphery with a cam slot which Wlll now be described.

Projecting outwardly from the periphery of the fly wheel is a segmental member 73. On the fly wheel 72 and the segmental member'7 3 are laterally projecting members 7 and 75 between which is formed a cam slot 76, which at its central portion extends inwardly, as indicated in Fig. 6. The parts just described are soarranged that when the fly wheel is rotated to a certain position of its movement, one of the pins 71 will enter the slot 76 and when it projects into the central portion thereof will cause the in termittent device member 70 to rotate onethird of a revolution until when the pin 71, which is on the arm that projected away from the fly Wheel, when the first of'said pins entered said slot, will be swung over, so that the first and third of said pins 'will rest adjacent to the periphery of the fly wheel, after the first of said pins leaves the slot 76.

By the operation just described, a rotation of a one-third revolution is imparted to the shaft 68 and the intermittent sprocket 69 thereon.

Below the shaft 68 in the frame 20 is a transverse shaft 77 on one end of which is a take up sprocket 78, and on the other end of the shaft 77 is a gear 79 in mesh with the gear 22.

The film 80 is threaded from the feed magazine 81 over the three film sprockets in the projecting machine.

For each sprocket 32, 69 and 78 there is a guide and tension devi"e. These devices are substantially the same in construction and 84 is an arm 85, carried on the'outer' end of which is a bracket 86 having spaced arms 87 between which arms of each bracket is mounted a shaft 88 on which is a'guide roller 89. Each of the shafts 82, 83 and 84 is formed with a flat side 90. Secured to each arm 85 by means of a screw 91 is a flat spring 92 which yieldingly presses against the shaft 82, 83, or 84 as-the case may be,

and is adapted when the guide roller 89 is adjacent tothe nearest film sprocket to engage the fiat face 90 for yieldingly .pressing the guide roller 89 toward the adjacent sprocket for thereby properly holding the film on the sprocket.

The shaft 82 is above the shaft 30. The shaft 83 is below and to the right of the shaft 68 and the shaft 84 is above and to the left of the shaft 77, otherwise the arrangement of the film tension imposing devices for each of the three sprockets is substantially the same.

The film-80 is threaded over the sprocket 32 and is then arranged to form the upper loop A, and is thence threaded adjacent to the frame .33, thence over the sprocket 69, thence is arranged to form the lower loop B, thence is threaded over the sprof'cket 78 and downwardly tothe take up magazine.

For yieldingly holding the film against the frame 33 and in proper position with relation to the light aperture, I have provided the following means.

A frame 93 stands adjacent to the forward face of the frame 33. An arm 96 extends horizontally forwardly from the arm 93 and is pivoted at 97 on the frame 20. F-orwardly of the pivot point 97 the arm 96 is provided with a curved slot 98. A screw 99 is fixed to the frame of the machine and is extended through the slot 98. The arm 96 is'arranged adjacent to the upper portion of the frame 93. Extending laterally from the arm 96 is an arm 96. Secured to the arm 96 are spaced, downwardly extending fiat springs 96", secured at their lower ends to the frame 93 at points between the upper and lower ends thereof. Q

The mechanisms in the frames 33 and 93 are all mounted on a plate 100 supported on the frame 20.

It will be seen from the showing in the drawings of Fig. 2, that the center of gravity of the frame 93 is such with reia' tion to the pin 99, as to cause the frame 93 to swing forwardly normally at its lower end away from the frame 33 and swing away slightly from the frame 33 at all points.

On the frame 20 is ascrew-threaded bearing 101 in which is mounted a screwthreaded bolt 102 bearing against the laterally extending flange 103 on the arm 96 forwardly of the pivot point 97. By screwing the bolt 102 downwardly the arms 96 and 96 will be tilted for swinging the lower ends of the springs 96 and the frame 93 supported thereby toward and against the frame 33 for forming a snug guide for the film and for yieldingly holding the frame 93 against the frame 33.

In the base 19 below the take up sprocket 78 is a slot through which the film 80 is drawn into the take up magazine 18.

A chain of gearing 113, 115, 116 and 114 operates the take up drum.

Supported on the frame 20 for covering the gear 22 and the gears connected therewith is a suitable gear casing member 118.

In the practical operation of my improved moving picture projecting machine, the parts are lns-talled as hereinbefore described, and as shown in the drawings.

The projecting machine may be tilted to properl show the light on the screen by manipu ating the handle 17, as shown in Fig. 1. The film 80 is threaded from the magazine 81, as shown in Fig. 2, around the guide roller of the upper film guide and tension device and over the feed sprocket 32, and is then formed into the 100p A, and threaded between the frames 33 and 95. The screw-threaded bolt 102 is adjusted to properly fit the frame 93 and hold it against the frame 33.

The film is then threaded over the sprockets 69 and 78 downwardly through the slot in the base 19 to the take up magazine.

When the devices are moved to proper position the engagement of the springs 92 with the flat portions 90 of the shafts 82 and 83 and 84 will hold said tension devices in proper position for snugly holding the film on the sprockets. I

The shaft 21 may be operated in any suitable way, as for instance, by a crank thereon, or by an electric motor or the like, for rotating the gear 22 and the gears connected therewith. The rotation of the gear 22 rotates the gear 31 for operating the feed sprocket, and the gear 79 for operating the take up sprocket. The gear 22 also imparts rotation to the fly wheel- 73 for thereby intermittently rotating the sprocket 69 in the manner hereinbefore mentioned.

If the pictures on the film do not frame accurately with relation to the light aperture, 34, the lever 63 may be manipulated upwardly or downwardly. Such sliding movement simply slides the intermittent device member 7 0 along the periphery of the fly wheel without changing their downward relative positions.

It will, of course, be understood that the gears are of such ratio, as to insure the proper relative operations of the parts.

It will be seen that my improved moving picture projecting machine is of very simple and comparatively inexpensive construction. It affords accurate and efficient means for operating and controlling the film.

The advantages of a machine of this kind may be largely seen from the foregoing descriptlon.

The framing device, whereby the intermittent sprocket is raised and lowered, is simply and quickly and easil operated.

Changes may be made in t e construction and arrangement of the parts of my improved moving picture projecting machine, without departing from the essential features and purposes of my invention, and it is my intention to cover by this application any modified forms of structure or use of mechanical equivalents, which may be in cluded within the scope of the claims of the patent to be issued hereon.

I claim as my invention:

1. In a device of the class described, a frame, a shaft mounted thereon, a film sprocket on said shaft, a second shaft, a fly wheel thereon having a cam slot near its periphery, an intermittent device member on said first shaft having three arms, pins on the respective arms, the parts being so arranged that two of said pins normally rest adjacent to the periphery of said fly wheel, and so that one of said pins enters said slot on each rotation of the fly wheel, and is operated to rotate said first shaft a third of a revolution for bringing the third of said pins to position adjacent to theperiphery of said fly wheel, and means for yieldingly pressing said pins against said fly wheel.

2. In a device of the class described, a frame, a shaft thereon, a fly wheel on said shaft having a cam slot near its periphery, a second shaft, an intermittent device on said second shaft having spaced pins, the parts being so arranged that two of said pins normall rest adjacent to the periphery of said whee so that one of the pms enters said slot, on each rotation of the wheel and is operated to rotate said second shaft a portion of a.- revolution for bringing another pin to position adjacent to the periphery of the wheel, a film sprocket on said second shaft, and means for adjusting said second shaft on the arc of a circle having its center at the center of said wheel, and means for yieldingly actuating said second shaft for holding said pins snugly against said fly Wheel.

3. A combination intermittent and framing device comprising a frame, a shaft:

thereon, a fly wheel on said shaft, a second shaft, means for adjusting said second shaft on the arc of a circle havin its center at the center of said wheel, a fi m sprocket on said second shaft, said second shaft and said fly wheel having coacting means whereby intermittent rotary motion is transmitted from the fly Wheel to the second shaft, and means for imparting yielding pressure on said second shaft for moving it toward the first shaft.

4. In a device of the class described, a shaft having a fly Wheel mounted thereon, a supporting member, a shaft supported thereby, coacting intermittent devices, said fly wheel and second shaft having coacting means for imparting intermittent motion from the fly wheel to the second shaft, means for supporting said supporting member for permitting it to be slid in the arc of a circle havin its center at the center of said first sha and means for imparting yielding pressure upon said supporting member forv tending to move it toward said 5. An intermittent timing device comprising a shaft, a fly wheel thereon, a supporting member, a shaft rotatably mounted therein, said fly wheel and second shaft having coacting means whereby intermittent motion may be imparted to said second shaft, means for supporting said sup orting member for ermitting it to be movec in the arc of a circ e having its center at the center of said first shaft, and a lever pivotally mounted between its ends and operatively connected withsaid second shaft.

Des Moines, Iowa, May 5, 1917.

MILTON L. PARRET.

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