Drive control apparatus for motion picture projector

Winding – tensioning – or guiding – Reeling device – Fishing rod reel

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Details

352124, G03B 104, G11B 1532

Patent

active

041010973

ABSTRACT:
A drive control mechanism for selectively actuating a motion picture projector to several operational modes to transport film between a supply device and a take-up device is provided that utilizes a brake mechanism to stabilize a selective driving assembly and to prevent film spillage.
The drive control mechanism is provided with a mode controller that translates various positions into predetermined axial and rotational positions and movements that is coupled through actuating members to control a dual clutch assembly driven by a unidirectional input. A brake assembly control device is also coupled to the mode controller and conditions the operation of the brake assembly.
The brake assembly is a pivotally operated dual brake shoe arrangement which is pivoted into operative contact with the dual clutch assembly wherein the brake shoe arrangement is selectively operated in and between predetermined operational modes as the brake assembly control device is axially shifted and rotated in response to the mode controller.

REFERENCES:
patent: 3843073 (1974-10-01), Day
patent: 3952969 (1976-04-01), Woodier

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