US1532386A - Cinematograph machine - Google Patents

Description

- J. CUMMINGS ET AL April 7, 1925.

CINEMATOGRAPH MACHINE Filed July 27 1923 2 Sheets-Sheet l April 7, 1925. "1,532,386

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Application filed July 19.23; Serial No. 654,133.

To {all whomit may concern; Figure i is a perspective view of part of:

Be it known that. JAMES. GUMarinesv and the intermittent sprocket. Harlem, ANDREW MGGREQOR Trnsoa, sub- The irame 5 to which the lens and the jects of the Kingof-Great Britain and Iregate, both of which are not shown in the a land, residing at29- Alberta-Street,sydney, d a ings, are attached is, mounted in any in the State of New South \V'ales, Common- Well known manner on the machine. A wealth of Australia, have invented certain iplateti is'slidably mountedwithin the frame new and useful improvements in Oinematoand is retained there in by vlugs T. The graph Machines, of which the following is machine shown in the drawii g is adapted to a specification. v to. be driven by; an electric motor and the 65 -This invention relates to cinematograph drive therefrom is taken by the pulley 8 machines and; more particularly relates to mounted on the shaft-9: which passes through the operating mechanisnii ot such machines. the plate 6. and transfers the drive to} the I th t inaehi-nej at present use cam gear, contained within the casing 10,

the gear controlling the movement of the actuating the intermittent. Sprocket 11. 70 film and the fan is complicated and costly Apinion 12 attached tothe-shaft- Qmeshes consisting of man; gear wheels and pinions with the wheel 13 which is mounted on a and shafts allow'ng extensive wearand thus shaft l4 whiclnpassing through the plate increasing the cost of maintenance, Also, 6 carriesthelower film sprocket 15,. The

the method of attaching the intermittent app ifilm sprocket 1 6: is carried on the shaft 7 pinion to its shaft does not permit of ready 1 s driven from the shaft 1% through removal and replacement except by experts. the chain 18 engaging the chain sprockets Now the object of this invention is to pro- 19 and 20' on the shafits l4 and 1 7.. vide a simple and efficient-driv and con-- The fan. is attached to shaft 21 35 trolling gear forthe purpose of; (a) drivmounted in bearings 22 and and carryso ing the film actuating mechanism Hag the helical Worm The bearings are masking the film and (03 synchronizing the rigidly attached to a member 25 which is f a slidably attached to the plate 6 by the A f th bj t f th in tio i to T-piece 26 which passes through the slot 27 so provide a simple means of attaching the inthereln. 5 tcrmittent sprocket to its shaft so that it The end of the member 25 is inclined and may b il removed f l nt, is kept bearing against a roller 28 attached Further objects are to provide a driving 0 the frame 5 by the spring 29. and controlling mechanism which shall be e i termittent sprocket 11 has two slots inexpensive both in first cost and lnainte- 30 formed 111 its barrel 31 which has a con 90 nance and which shall be silent in operation. t a ly Situated gr 001131 and v a I The invention refers to the type of Inatached to its operating shaft 33 by means chine in which the lamp housing, the light Of it screw 3& in the collar 32 passing through condenser, the lens and the gate are all 1111016 in the shaft- 40 rigidly mounted and the film control gear hen it is desired to mask the film the is adjustably mounted and in which the fan plate 6 together with all the film control shaft is mounted to one side of the l ns, gear and that part of the film between the The invention will be now fully explained pp r and lOWeI' film p kets 6 and 15 is by referring to the accompanying drawings moved vertically by turning the shaft in which a which, by means of the crank 36 and link 37 ion Figure 1 is a perspective view of one side connecting with the projection 38 on the slidof the frame carrying the driving and cong Plate 02111568 the film t0 Alter its p itrolling mechanism showing the fan syntion relative to the aperture in the gate chronizing gear, which is fixed so that each individual picture Figure 2 is a perspective view of part of on the film when stationary registers with 1 the opposite side of the frame showing the the aperture. The motion of the plate 6 is means for masking the film. assisted by the helper springs 39. V

Figure 3 is a part sectional elevation of The vertical movement of the plate 6 the intermittent sprocket showing method causes the member 25 to move in Or out of mounting same, and under the action of the rOlleI? 28 or the spring a 29. This horizontal motion of the helical tached to said vertical plate in such a worm 24 for the reason that it is in mesh with the gear wheel 13 causes it together with the shaft 21 and the fan to be displaced angularly so that the fan is synchronized simultaneously with the masking of the film.

lVhen the frame 5 is mounted in its place on the complete cinematograph machine the operating mechanism is all contained within a suitable cover.

lVe claim:

1. A cinematograph opera-ting mechanism in which the fan shaft is mounted in bearings adapted to be displaced horizontally on a vertical plate by the relative movement be tween said vertical plate and a frame, and means for effecting the horizontal displacement of said bearings and shaft.

2. A cinematograph machine operating mechanism in which the mechanism is mounted on a vertical plate adapted to rise and fall within a frame the fan shaft being supported in bearings mounted on a base at manner as to allow of horizontal displacement, said base having an inclined end adapted to bear against a roller mounted on said frame, a spring on said frame adapted to maintain said base in contact with said roll er, a helical worm on said fan shaft adapted to mesh with a gear wheel and means for driving said gear Wheel.

The improved cinematograph machine operating mechanism comprising a vertical plate adapted to slide vertically in a frame,

said frame carrying the lens and gate, means for raising and lowering said plate, a driving shaft passing through said plate to the intermittent sprocket actuating gear, said intermittent sprocket having a slotted bar rel with a centrally disposed integral collar thereon and adapted to receive therein a screw passing through the intermittent sprocket shaft, a pinion on said intermittent sprocket shaft adapted to engage with a gear wheel mounted on the shaft carrying the lower film sprocket, a helical worm mounted on the fan shaft and engaging said gear wheel, the fan shaft bearings being mounted on a base plate attached to and adapted to slide horizontally on said movable vertical plate, said base plate having an inclined end adapted to register with a roller at tached to said frame, a spring adapted to keep said base plate up to said roller, an upper film sprocket shaft passing through said sliding plate and adapted to be driven from said lower film sprocket shaft by a chain engaging chain sprockets on said up per and lower film sprocket shafts, means for releasing said sliding vertical plate from said frame, and means for moving the vertical plate.

In testimony whereof they have allixed their signatures in presence of two witnesses.

JAMES CUMMINGS. HAROLD ANDREW McGREGOR WILSON. Witnesses T. O. ALLEN, N. M. GALLDORT.

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