Shutter and trim apparatus

Details Shutter and trim apparatus Shutter and trim apparatus

1978-12-01

1980-06-24

Hix, L. T.

354 59, 354230, G03B 714, G03B 900

Patent

active

042092434

ABSTRACT:
A photographic camera apparatus includes an automatic exposure control arrangement having scanning shutter blade elements which are accelerated to a determinate velocity and thereafter released for movement through a range of progressively varying sized apertures at the determinate velocity to define a photographic exposure cycle. A uniform trim control is provided to give the photographer a degree of overriding personal control through which he may slightly vary film exposure by simultaneously varying the determinate velocity at which the shutter blade elements traverse the aperture range and the amount of scene light transmitted to a photoresponsive control system which automatically controls film exposure.

REFERENCES:
patent: 3046859 (1962-07-01), Distel
patent: 3205795 (1965-09-01), Grey
patent: 3471226 (1969-10-01), Wasielewski et al.
patent: 3750543 (1973-08-01), Eloranta et al.
patent: 3832722 (1974-08-01), Douglas
patent: 3927415 (1975-12-01), Petersen
patent: 4007468 (1977-02-01), Blinow et al.
patent: 4016573 (1977-04-01), Mucke
patent: 4023187 (1977-05-01), Shenk
patent: 4040072 (1977-08-01), Johnson et al.
patent: 4149794 (1979-04-01), Takahama et al.

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