Dual friction clutch for motion-picture projectors

Details Dual friction clutch for motion-picture projectors Dual friction clutch for motion-picture projectors

1975-09-05

1978-02-28

Herrmann, Allan D.

192 clutches and power-stop control

Clutches

Plural clutch-assemblage

192 485, 192 93R, 64 30R, 64 30C, F16D 4700, F16D 702

Patent

active

040761096

ABSTRACT:
The disclosure describes a dual friction clutch, of particular application to motion picture projectors for controlling the operation of spool carrying spindles, in which the drive to a spool can be selectively decoupled, coupled through a weak clutch and coupled through a relatively strong clutch mounted at opposite ends of the spindle, by displacement of a selector device displaceable parallel to the spindle axis to any one of three positions in the first of which the drive is decoupled from the spool, in the second of which the selector connects to the spool through a weak friction clutch and a third position in which the selector transmits the drive to the spool through the strong friction clutch with the weak friction clutch positively locked.

REFERENCES:
patent: 1935454 (1933-11-01), Lansing
patent: 2092447 (1937-09-01), Fleischel
patent: 2521427 (1950-09-01), Victor
patent: 2675835 (1954-04-01), Kiekhaefer
patent: 2709349 (1955-05-01), Kuehn
patent: 2913885 (1959-11-01), Debrie

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