Braking mechanism for focal plane shutters

Details Braking mechanism for focal plane shutters Braking mechanism for focal plane shutters

1977-04-18

1978-08-22

Griffin, Donald A.

354252, G03B 940, G03B 908

Patent

active

041092660

ABSTRACT:
A braking mechanism for focal plane shutters provided with a brake operating member pivoted in the tip portion of a shutter blade actuating member so as not to be freely movable and capable of taking an operating position and a non-operating position, a brake wheel supported rotatably with a proper resistance force on a shutter base plate and engageable with the brake operating member slightly before the end of the operation of the shutter blade actuating member and a stopper set on the shutter base plate and engageable with the shutter blade actuating member to stop the shutter blade actuating member so that a braking force may be efficiently applied to the shutter blade actuating member during a slight motion just before the end of the operation of said actuating member and then the braking means may not act as a load when said actuating member is stopped and the shutter is cocked.

REFERENCES:
patent: 2928326 (1960-03-01), Loose et al.
patent: 3871012 (1975-03-01), Haraguchi
patent: 3886572 (1975-05-01), Onda et al.
patent: 3946413 (1976-03-01), Onda et al.

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