US1504726A - Film-feeding mechanism for cinematographs - Google Patents

Description

Aug. 12, 1924; 1,504,726

' H. SEUFERT FILM FEEDING MECHANISM FOR CINEMATOGRAPHS Filed Nov. 13, 1922 /5 lil nmmm'limfmm INVENTOR. [YER MA/v Ss- UFE/VZ W A TTORNEY:

Patented Aug. 12, 1924.

HERMANN SEUFERT, OF BROOKLYN, NEW YORK.

FILM-FEEDING MECHANISM FOR, CINEMATOGRAPI-IS.

Application filed November 13, 1922.

T3 all whom it may concern:

Be it known that I HERMANN SEUFERT, a citizen of the United States of America, residing at Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Film- Feeding Mechanism for Cinematographs, of which the following is a specification.

The invention relates to cinematograpl'is or the like and particularly to a film feeding device therefor and has'for its object to provide one which will be simple in construction and whose operation will be accurate and effective.

My invention will be more fully understood by reference to the accompanying drawing in which Fig. 1 is a sectional elevation of the film feeding mechanism; Fig. 2 a longitudinal section on line 22 of Fig. 1:

Fig. 3 is a sectional top plan view on line 3 3 of Fig. 2; Fig. l a front view of the mechanism for preventing retrograde movement of the film band, and Fig. 5 a side view thereof.

In the drawing only so much of the device is illustrated as will be necessary to understand the invention. it being understood that the other parts of the device are the same as described in the above mentioned main application.

The spindle 86 which carries the film feeding drum (not shown) has loosely mounted thereon the disk 10 on whose sleeve extension bears the ring 11 and the plate 47 fully described in said earlier application.

1 The ring 11 is operated from the driving shaft which carries the fly wheel 39 and the eccentric 33 in the same manner as and by means of the reciprocating mechanism described in the same application.

The invention resides in the means for transmitting movement from the ring 11 to the disk 10 so as to feed the film intermittently the length of a picture.

According to this invention the outer part of the hub oftthe fly wheel 39 is formed with cam portion 119. A horizontal arm 123 projeoting from the vertical plate 1 of the frame carries a spindle 124 on which is fixed a downwardly projecting arm 120 the free end of which is bifurcated and carries a roller 122 adapted to bear against the cam 119. On the same spindle 124 is also fixed a second upwardly projecting arm 121 extending centrallv below the driven shaft 86 of the film feeding mechanism. The upper end Serial No. 600,575. 7

of said arm terminates at a point about even with the hub of the plate 47 and carries a segment-like member 125, whose inner radius is slightly larger than that of the hub of said plate and whose length is about one quarter of a circle.

Fixed to the ring 11 is a bracket 128 carrying a pin 129 on which is fulcrumed a bell crank lever 126. One, 126 of the arms of the latter projects into the space between the segment 125 and plate 47 and carries in its upper end a roller 127. The lower arm 126 extends below the feeding disk and is formed at its free end to a nose 126 which is adapted in cooperation with notches 118 formed in the feeding disk 10 to act as a coupler and cause the latter to turn with the drum 11 and plate 47. Fixed to the lever arm 126 is a plate spring 133 hearing against the plate 47 and whose tendency it is to swing the lever arm 126 away from the plate 17 and the arm 126 against the disk 10, so that its nose 126 will engage one of the notches 118 of said disk 10.

As already stated the eccentric 33 mounted on the disk 38 transmits motion to the feeding disk 11 in the same manner as described in the main application above referred to. The cam 119 is of such a shape that the roller 122 at the beginning of the feeding movement of the disk 11 will bear on the projecting part thereof, as a result of which the lever 120 will be swung in a direction away from the fly wheel 39 and the arm 121 toward the plate 47. The segment 125 will press the roller toward the plate 17 against the tension of the spring 133, as a consequence of which the arm 126 will be swung away from the disk 10 and release the latter so that the ring 11 while uncoupled from the disk 10 will not transmit motion to the film drum shaft 86. When the roller 122 passes off the projecting part of the cam 119, the lever 121 will cease pressing against the roller 127 of the bell crank arm 126 and consequently permit the latter under its spring action to swing into operative position, i. e., with the hook 126 snapping into one of the notches 118 of the disk 10 and coupling it with the ring 11. [I

By such construction a faultless intermittent feeding of the disk 10 and consequently of the film drum is obtained.

The device for preventing retrograde movement of the film band is illustrated in Figs. 4 and 5.

Here 130 denotes metal members arranged at equal but very short distances from and tangentially to the disk 10 and fixed to the plate 1 of the frame. The inner edges of these members are. cut out as at 130 Fastened to these members by spiral springs 132 are small rollers 131 so that the latter are drawn inwardly into the Wedge shaped spaces formed between the circumference of the disk 10 and said out out edges of the oblique members 180. Thereby the rollers 131 become wedged against the disk 10 and prevent the latter from turning in the reverse direction of the feed.

What I claim is In a film feeding mechanism for cinematographs or the like, the combination With the driving shaft and the film feeding drum shaft, of a continuously freely revolving body on said second shaft, a notched disk loose on the latter, a hooked sprin actuated lever carried by said rey olving body and engaging a notch in said disk to couple it to said body, a cam on said driving shaft and a lever operated from said cam and adapted to intermittently act 011 said hooked lever to ncouple it from said disk.

In testimony whereof I afiix my signature in presence of two Witnesses.

HERMANN SEUFERT. Witnesses:-

MAX A. ORDMANN, JOSEPH T. MoMAHoN.

Images