Low-inertia electronic shutter

Details Low-inertia electronic shutter Low-inertia electronic shutter

1977-03-22

1978-09-05

Gellner, Michael L.

354234, 354250, 354268, G03B 916, G03B 962

Patent

active

041124510

ABSTRACT:
In a self-cocking impact shutter, an opening blade is held closed prior to shutter actuation by engagement of a releasably held impact driver with a first tab on the opening blade. When the impact driver is released, it encounters a second tab on the opening blade to open the shutter and hold the opening blade in an open position by continued engagement with the second tab. A low inertia closing blade is held open by an electromagnet that attracts an armature carried by a cantilever spring. The cantilever spring is held in engagement with the closing blade by the electromagnet. The shutter is re-cocked by return of the high energy lever to its releasably held position.

REFERENCES:
patent: 486397 (1892-11-01), Eastman
patent: 2443164 (1948-06-01), Harney
patent: 3661066 (1972-05-01), Ettischer et al.
patent: 3678838 (1972-07-01), Huschle et al.
patent: 3685408 (1972-08-01), Ettischer
patent: 3848907 (1974-11-01), Shiurila
patent: 3997859 (1976-12-01), Miller
Kodak Research Disclosure Nos. 15416, 14753.

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