1980-01-28
1981-10-27
Gellner, Michael L.
354 50, 354234, 354266, G03B 7093, G03B 962, G03B 1738
Patent
active
042970130
ABSTRACT:
A digital system for controlling coordination of the various portions of the camera to operate in selected modes including the automatic and bulb modes is provided with signal forming means comprising a count start switch and a bulb control switch connected in parallel to each other. Where the automatic mode is selected, in a predetermined time interval after the initiation of an actuation of release of the camera, as the both switches are open, the signal forming means produces an actuating signal which is then applied to discriminating means, causing the shutter to operate automatically. Where the bulb mode is selected, no actuating signal is produced even after the termination of duration of the predetermined time interval so that the discriminating means permits the opening of the shutter to continue until the termination of the release actuation.
REFERENCES:
patent: 4227787 (1980-10-01), Aizawa et al.
Kawamura Masaharu
Shigeta Yoshihiro
Sugiura Yoji
Uchidoi Masanori
Yamamoto Hiroshi
Canon Kabushiki Kaisha
Gellner Michael L.
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