DE451393C - Cinema engine with sinusoidal control disk for the movement of the gripper - Google Patents

Description

There are cinema drives known in which, a sinusoidal control disk the drive of the lock as well as the gripper takes place and one with the cam cooperating control member for the perpendicular or approximately perpendicular to the film reciprocating movement of the Gripper tips is provided.

In these facilities, the guide rollers of the control member and also the guide rollers the parts otherwise cooperating with the cam are pressed against the circumference of the cam by spring force. Of these devices, the subject matter of the invention differs in that a The guide part of the film gripper that presses against the curve and moves onto it Senses acts, on the other hand, on a also pressed forward lever, which with the Gripper support part is coupled by levers, etc., in a pivoting sense.

This ensures that the gripper no longer oscillates, but rather during the Execution of the circuit a rectangular or parallelogram-like inevitable movement executes. In this way, the gripper engages in the same depth at all times the film perforation secured.

One embodiment of the indexing device according to the invention is shown in the drawing shown, namely Fig. 1 shows it in the exposure, i.e. resting state, immediately before Beginning of the progression of the film and Fig. 2 at the end of the progression.

In a bearing there is a sliding

Fig.i.

part6 ^s . At its end facing the film web, this has a guide slot b ⁵ lying parallel to the film web in part δ ⁴ . This is connected to the bearing ⁷ by springs b ^{1 in} such a way that the sliding part b ^{6 is} always pressed against a rotatable control element and rests on its sinusoidal-shaped circumference with a sliding part b .

A support part b ^{3 of} the gripper b ² slides up and down in the guide b ⁵ by means of a pin or the like. This support part b ³ is connected directly (Fig. 1) or indirectly (Fig. 2) by means of an intermediate ^{linkage c 3} with a shift lever c ² , which rests against the sinusoidal curve of the control member a under the action of a spring ¹ with a sliding part c.

Claims (1)

Claim: Cinema engine with bucket sinusoidal control disc for the gripper drive, on the circumference of which the control elements for moving the gripper are pressed resiliently parallel to the film movement and are guided by means of guide foils, characterized by a rectangular control of the gripper (& ^s ), caused by one perpendicular to the film (α ¹⁾ through the Sinus'kurve forward and backward, moving slide (b ⁶⁾ provided parallel to the film gripper oidler Grafertnägerführung (ö ⁵⁾ 'in which also by means of the sine curve (α ¹⁾ controlled Hebelgestäage ( c ² , c ³ ) the gripper support part (& ³ ) is moved up and down. Fig. 2.