SU10675A1 - A device for promoting a film in a cinematographic apparatus - Google Patents

Description

The proposed device has

gap by the introduction of friction

protect the film from destructive

the influence of the gear drums on it, pr / o-moving it in cinematic

devices and usually operating on it

directly only by their teeth.

In FIG. 1 depicts the view

such a device, acting

using endless ribbons; FIG. 2

and 3-side view and section of another shape

. executions - devices, with replacement

tapes twin drums with dredging and

; teeth, and figs. 4-third form, in JKO, the drums are put on the skis of

rubber or leather.

The device consists of two drums A to B (Fig. 1), freely sitting on the axles along these drums and along the rolls C and. D, two bridges of the first Langa E with alternating spurs on them and O, corresponding to the perforation of the Filma R .. these pairs of tapes -; the shafts of A and B and the rollers C and skips the film R. The tapes E have such a section that the film, the passage between them, concerns them only with its edges near the perforation, and not the very image .; Both tapes E tightly fit each other.

so that the spikes of one tape, having passed through the perforation of the film P, entered into the corresponding cavities (f of the other tape. The film sandwiched between the two tapes will move in addition to the action of the projections and friction on the surface of the tapes.

Zubchatki (not shown in Fig. 1) are attached to C with x a and ft, connected to each other and to the main mechanism so that when the knobs of the apparatus are held, the drums A to B begin to rotate uniformly in different directions and move the film P with between f desired speed.

The second form of the device (Fig. 2 and 3) consists in that the axes a and d are attached to the body of the apparatus K, on which a pair of reels A and B rotate. The same axes are mounted on interconnected serrations L and M, driven into action from the main mechanism of the apparatus. B-arabans L-Cs have teeth along their edges interspersed with grooves about to enter into them the teeth of another caravan. Both drums are tightly connected to each other in such a way that when passing between them |) ilm P (Fig. 3) will be. re-move not only under the action of incoming from different species