US972142A

US972142A - Moving-picture machine.

Info

Publication number: US972142A
Application number: US531031A
Authority: US
Inventors: Edward H Sperberg
Original assignee: SELIG POLYSCOPE Co
Current assignee: SELIG POLYSCOPE Co
Priority date: 1909-04-17
Filing date: 1909-12-02
Publication date: 1910-10-04
Anticipated expiration: 1927-10-04

Description

E.*H. SPERBERG. MOVING PICTURE MACHINE. APPLICATION FILED DEC. 2, 1909,

Patented Oct. 4, 1910.

UNITED sTA'rEs PATENT OFFICE.

EDWARD H. SPERBERG, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE SELIG POLYSCOPE COMPANY, OF CHICAGQ II LINOIS, ArCOBPORA'I-ION MOVING-PICTURE MACHINE Specification of Letters Iatent.v

Original application filed April 17, 1909, Serial No. 490,465. 'Divided'and this 1909. erial No. 531,031.

Patented- Oct'. 4, 1910. application filed December 2,

To all whom it may concern:

Beit known that I, EDWARD H. Srnnnnno, a citizen of the United States, residing at Chicago, in the county of Cook and'btat of- Illinois, have invented certain new and useful Improvements in Moving-Picture Ma chines, of which the following is a specifiportion of the body of the machine is generally provided with an aperture of a size and shape corresponding to that of the ,picture on the film, before which'aperture the film asses, and through which the light rays rom the lamp within the machine are projected against and through the film. In use, each picture on the film is caused to be arrested before this aperture for the proper fraction of a second, during which arrested motion period, the shutter is removed or opened, allowing the rays of light tocome against and penetrate through whatever portion of the film may be before the aperture.

' It is evident that to secure properiand satisfactory operation of the machine, the film must be arrested each time, so that one exposure of it is fully and squarely in front of the aperture before the shutter is re-} moved or opened. At the present time, it is customary to shift'either that portion of the machine carrying the aperture, or else bodily shift the spools which control the,

movement of the film, with respect to the aperture. The effect in either case is to shift the film andthe aperture with respect to each other, but the means for doing so arefound to be cumbersome and not altogether satisfactory. I

It is the intent ofthe present invention to provide new and better means for accomplishing this relative shifting of the film when in arrested motion position, with respect to the aperture. This I accomplish by shifting the film while maintaining the body of the machine stationary. And the invention consists in the features'of construc: tion and combination of parts hereinafter described and claimed.

In the drawings, Figure 1 shows .a side elevation of 'my' improved film shifting device partly in section Fig. 2. shows anen'd grooves.

sectional elevation of the device, taken on line 2--2 of Fig. 1, looking in the direction" of the arrow; and Fig. 3 shows .a plan view 'of the device.

In-the figures, a driving shaft 4 is driven by means of any suitable driving mechanism, not shown. The shaft 4 has cut in its face a helical slot or key-Way 5, adapted to receive a suitably formed key 6, attached'to a split sleeve 7 surrounding the shaft 4. I The two segments of the split sleeve 7 are held together by means of bolts, or other" suitable connecting means 8. It is seen that any 1011- gitudinal shifting of the sleeve 7 along the shaft- 4 will cause the sleeve to rotate, with respect to the shaft, by reason of the engagement of the keyv 6 with the key-way 5. The sleeve 7 has formed, in its periphery, one or more annular grooves 9, and the tongues 10 of a collar 11 are adapted to engage with the The collar 11 is supported on a bell-crank lever device 12, onej'of whose arms 13 is of Y-shaped formation, the collar being attached to the arm by means of bolts or pins 14. The bell-crank is hinged at its fulcrum 15, and its other arm 16 is 0011 nected to a link 17, which link is suitably "connected to proper operating devices, as,

for example, a lever 18, having a fulcrum 19, and properly connected to an operating handle, not shown.

attached to ita The sleeve 7 has rigidly feather key 20,which feather key fits into a key-way 21 in a hub 22 of the film driving mechanism l8is move d,thereloy shifting the bell-crank,-causing the sleeve to m'ovelongitudinally with respect. to the driving shaft 4, and the sleeve 7 to rotate, with respect to the drivingshaft, thatthe feather key 20 will thereby also be rotated, and will carry shaft,- but any'pther suitable evice for doing this may be used without departing from the spirit of my, invention.

wheel 23. It is evident that when the lever 10 the shaft, a longitudina feather key foren- MARY R. FROST.

. 1 claim-z" I a The combination, with a -fi1m. driving shaft having ahelical channel in its surmeans engaging the annular ro;ove, for moving the sleeve longitudinaly with respect to the shaft, whereby the sleeve, feather face, of a 1m 'drivmg sprocket rotatably mounted thereon and prov1ded with a longitudinal keyway ladgl lacent to the shaft, a

to the shaft, substantia ly as descrlbed. sleeve on the s having an annular I DWARD SPERBERG. groove in its outer periphery, a key on its I Witnesses: .1nner. 'p0'rtion for enga In; the channel of THOS. A; BANNING, Jn,

gaging the key-wa of the sprocket, andkey, and sprocket are rotated wlth respect 1:;