US1183082A - Moving-picture machine. - Google Patents

Description

i P. F. Knus, MOVING PICTURE MACHINE. Y APPLICATION FILED SEPT- 25, 1913-V 1,183,082.

Patented May 16, 1916 www www UNITED sTATEs PATENT oEEIoE.

PHILIP E. Iza-Ue, or NEW YORK,- N.'Y. v

MovINGhPICTURE MACHINE.,

Specification of Letters Patent.

Application filed September 26, 1913. Serial No. 792,013.

T all whom tv may-concern:

Be it known thatI, PHILIP F. lKRUG., af

tion is to provide an improved and a simplified mechanism to intermittently and positively and silently work the picture lm vso across the picture aperture oroptic axis of the machine. Accordingly, I provide, in connection with the usual constantly moving film take-up mechanism, an engagement to bear intermittently on a loop formed in the film after it has been fed -past the aperture and -to quickly jerk the succeeding picture units into framed position in the aperture after which the spent film is worked on to the take-up reel by a take-up sprocket as is usual with devices of this character.

Another object ofthe invention is to provide a simple and quickly actuated means for v'accurately framing the picture units" without interrupting the actuation of the .machine, Without affecting the film driving mechanism and Vwithout moving any holding frame or other material part of the'machine.-

A further object of the invention is to provide a simple means for adjusting the ratio between the time intervals during which the picture unit is'held stationary and during which the next unit is being moved into its held position. s

- Various other objects arid advantages will be in part obvious and in part more fully setforth in the' following description of a preferred embodiment of my invention which also includes certain new and novel features lof construction and combination of parts hereinafter set forthand claimed.

In the drawings z-Figure 1 is a fragmentary side elevation of a portion of a moving picture machine head showing a preferred embodiment of my invention installed therein. Fig. 2 is a front elevation of the lower portion of the device shown in Fig. 3. Fig.

3 is an enlarged detail view of a portion of the cam movement shown in Fig. l, and Fig. 4 is an enlarged" sectional view on the line 4 4 of Fig. 1.

There is shown a frame 1 forming a part ofthe head of a moving picture machine having the usual aperture 2 .across the opticv axis of the machine and having -the usual feedA sprocket 3, and take-up sprocketv 4, the

latter suitably geared together and driven continuouslv and in-unison from afshaft 5 Whlchinaybe the main drive shaft.

A pivot pin 6 is carried by the frame,

v.which 'pin extends parallel to the Aplane of the film and has 'suspended therefrom, the 65 i upper end of` a rocking arm 7 the lowerend of .which is formed into a disk 8 disposed between an extension 9 of the frame 1 and a hand lever 10 which projects forwardly of the machine convenient tothe operator.

A .transversely extending bolt '11 passes through said extension, disk andflever t6 fasten these members together, and preferyably is drawn into `a frictional tight er'igage-l ment therewithuso that the parts will remain in their shifted positions. The lever 10 car'- .ries'a pin. 12v which extends into a slot 13,.

in the disk 8 which slot is disposed in substantially radial position relative to the axis of the bolt 11, which lis disposed ina slot 25 in the disk 8. 4

A lever-15 is fulcrumed adjacent one end of the pivot pin 16 which parallels the pin 6 and has its other end suitablyjournaled in a wide portion ofthe arm 7 intermediate its 35 length... A pair of horizontally Vspaced rollers 17 and 18 are rotatably mounted on the lever 15 and on opposite sides of the pin 16.

To give the rollers a reciprocating move ment, an extension 419 from the lever 15 is 90 connected bv a -link 20 with the eccentric pinion 21 which is mounted on the frame and is in mesh with the gear wheel 22 driven from the driving shaft 5.

The picture film 23 is fed by the sprocket 95y u '3 into an upper loop 24, lfrom which-it is drawn into its usual frictional engagement with the picture aperture 2. From the picture aperture it passes in an S shaped loop about opposite sides of the rollers 17 and 100 18 in succession and passes on to the usual take-up sprocket 4 to the usual take-up reel, not shown.l By means of `this device the rollers 17 and 18 reciprocate in opposite directions about the fulcrum pin 16 to inter- 105y mittently form a pronounced S shaped loop in the film and then Idisengage themselves from the loop permitting the sprocket 4 to partially take up the loop and on the next engagement of the rollers withthe film an- Patented May 1 6, 1916.

other portionl of .the film is drawn-acrossthe aperture. The sprocket 4 is continually feedingthe film; during the periods when ,the film k is stationary in the aperture, the

sprocket 'is taking vup the lower S shaped loop and during vthe movement of the filn across the aperture thesprocket is assisting t0 draw the film about the rollers 17 and 18 thusv permitting a very rapid intermittent movement'of the film.

` Should it be necessary to frame the picture units the handle of the lever 10 may be raised or lowered, which acts through the pin 12 to bear onf the lever 7' swinging the same on its pivoting arm 6, thus bringing the meanposition of the rollers closer to or further from the picture aperture and due to the particular form of connection between the lever and arm 7, the movement of the lever is much reduced so that a re-- fined adjustment of the position of the units relative to the horizontal edges of the aperture is attained.

Further the framing of the picture by this1 j means does not necessitate any shiftingv of the main film driving mechanism as the sprockets 3 and 4 are securely mounted in fixed position in the machine and positively connected to the main' driving shaft 5. It is merely necessary to shiftslightly thev position of the arm 7 and this shifting in no way affects the actuation of the intermittent feeding mechanism carried thereby.

It is noted that the rollers 17 and 18 have plain peripheries andengagethe filmentirely on one side and for` some material'distance along the length thereof, thereby minimizing the danger of ripping the side apertures in the film as it is fed through the machine. Further these rollers'are inexpensive and even wooden spools have been found to be very effective. There is thus eliminated the expensive milled parts at present constituting the Geneva stop feed and the equally objectionable engagement yof a toothed member with the apertures in the film as this intermittent movement places av severe strain-on the film about the side apertures. been observed that the rollers in 'their rapid movement into engagement with the film forms minute cracks transversely of the same and these cracks become more pronounced as the iilm was repeatedly used. It was found experimentally that the lm should be engaged by a fiat surface or rather a slightly 'curved surface to eliminate this cracking action and as this ideal contacting surface was not possible, the rollers are made with as large a diameter as possible so as to present a periphery with the least possible curvature and the parts are so arranged that the film engages almost half of the periphery. To identify the size of these rollers it may be said that theyshould have a diam- With devices of this character it has y eter not less than the width of the lm to avoid destroying the used a few times.

.By means of this construction the ratio of periods of rest to periods of lnotion of the film atthe aperture may be readily varied by moving the pivotal connection of the link 2() with the extension 19 toward or from the pivotal pin 16.

As the object of the intermittent feed is film after it has been primarily to draw the film across the aperture, it is obvious thatthe roller 18 may revolve about a fixed axis, in which case the roller is mounted on the frame, and the roller 17 alone reciprocated back and forth to alternately form a single loop in the film instead of the double or S` shaped loop heremechanic may be made therein Without departing from the spirit of the invention,

provided the vmeans set forth in the following claims are employed..` i

-Having 'thus describedv my invention, I claim ril 1. In a moving picture machine, the coinbination: with a frame,y a. depending arm having its upper end pivoted to the frame, a reciprocating film feeding mechanism mounted on said arm,- a lever engaging'the lower end'of the arm for adjusting the position of said arm relative to said frame, a

.film driving shaft revolubly mounted in fixed position in the frame', and means con'- tinuously reciprocating said, mechanism from the rotary movement of ysaid shaft.

2. In a device of the class'ldescribed, a support, aI broad plate having one end pivoted to said support, a shaft journaled in said plate and projecting therefrom, a lever having a plurality of arms pivoted to the projecting portion of-.said shaft, a film actuating roller `carried by one arm of said lever, a reciprocating link pivoted to the other arm of said lever, means for reciprocating said link and `manually actuated means including a pin and slot connection Iengaging thel end of said plate opposite the pivoted end for swinging the same about its pivotal connection thereby to adjust the position of said roller. i

' 8. In a moving picture machine, means .for feeding the film intermittently across the picture aperture comprising a lever pivoted intermediate its length, a pair of film engaging rollers rotatably mounted on opposite sides of the pivotal connection of th`eY lever With its rollers is rocked to feed the film and means operatively connected to said lever to vary the position of the pivotal point of the same thereby to frame the film.

4. In a moving picture machine, means' for feeding the film intermittently across the picture aperture comprising a pivoted lever, a film engaging roller rotatably.

mounted on said lever and spaced from the pivotal connection of the lever, an extension plurality of link engaging means spaced unequally from the pivotal connection of the lever, a rotary member having a fixed axis of rotation, a link having one end pivoted to Said rotary member at a pointoset from its axis of rotation and having the other end pivotally connected to one of the engaging means on the extension, said other end adapted to be'shifted to another of said e'n gaging means4 thereby to varythe extent of movement of the roller.

In Witness whereof I have hereunto set my hand in the presence of two Witnesses.

PHILP F. KRUG.

Witnesses W. S. OR'roN, '3). F. DAWES.

from said lever, said extension having a 2u

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