Device for controlling an electric focal plane shutter

Details Device for controlling an electric focal plane shutter Device for controlling an electric focal plane shutter

1974-06-04

1976-05-04

Hix, L. T.

354 51, 354 60R, 354237, 354238, G03B 908

Patent

active

039552098

ABSTRACT:
A device for controlling an electric focal plane shutter in a camera is described, in which an electromagnet which controls the timing of a trailing curtain of the shutter is excited in response to the depression of a shutter release member and demagnetized when a predetermined time has lapsed. An actuating member is provided between the shutter release member and a leading curtain holding lever so that the leading curtain may be released upon operation of the actuating member. A blocking lever is provided to block the actuating member. The blocking lever is moved to a position to release the actuating member by the excitation of the magnet. Further, by the excitation of the magnet, a starting lever which brings the trailing curtain holding lever to its holding position is actuated to bring the latter to the holding position. A delay circuit is provided in the device to delay the excitation of the magnet.

REFERENCES:
patent: 3595154 (1971-07-01), Espig
patent: 3641902 (1972-02-01), Kikuchi et al.
patent: 3718077 (1973-02-01), Ono

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