1990-03-09
1991-02-19
Gellner, Michael L.
354262, G03B 908, G03B 920
Patent
active
049948342
ABSTRACT:
The forcal plane shutter for cameras is equipped with a first release lever capable of retaining a rear blade group at position to close an exposure aperture, and a second release lever capable of maintaining a front blade group and the rear blade group at the unfolded position thereof and the folded position thereof respectively until the front blade group and the rear blade group are attracted and retained at the unfolded position and the folded position respectively securely with an electromagnetic device. The focal plane shutter is of a double light interruption type which has excellent response to the release signal and capable of assuring stable operations. The focal plane shutter further comprises a control means capable of retaining the first release lever in the released state thereof and can be set in a successive photographing mode accordingly.
REFERENCES:
patent: 4171897 (1979-10-01), Fujita et al.
patent: 4739355 (1988-04-01), Saito
Saito Toshihisa
Suzuki Akira
Takahashi Shigemi
Watabe Ken-ichi
Copal Company Limited
Gellner Michael L.
Noh Jae N.
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