Preview apparatus in single lens reflex camera

Details Preview apparatus in single lens reflex camera Preview apparatus in single lens reflex camera

1997-11-18

1999-03-02

Gray, David M.

Photography

Single lens reflex camera

With mirror support or drive

396461, 396509, G03B 1724

Patent

active

058782966

ABSTRACT:
A preview apparatus in a single lens reflex camera is provided in which a mirror drive mechanism, a diaphragm drive mechanism, and a shutter are driven in association with the rotation of a single-revolution cam gear which is driven by a motor. When the release switch is turned ON, the one-turn cam gear is rotated by single-revolution in the forward direction, and when an external preview switch is turned ON, the preview operation is carried out by the reverse rotation of the single-revolution cam gear within a predetermined angle range in which the stop-down operation takes place without causing an upward movement of the mirror.

REFERENCES:
patent: 4792730 (1988-12-01), Ootsuka et al.
patent: 4792823 (1988-12-01), Fujino et al.
patent: 4835558 (1989-05-01), Araki et al.
patent: 5257052 (1993-10-01), Kurosaki et al.
Copy of a United Kingdom Search Report issued with UK App. No. 9724171.5.
A Search Report issued with UK App. No. GB 9724169.9.
A Search Report issued with UK App. No GB 9724172.3.

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