Electromagnetically driven shutter

Details Electromagnetically driven shutter Electromagnetically driven shutter

1981-08-21

1983-01-11

Gellner, Michael L.

G03B 962

Patent

active

043679382

ABSTRACT:
An electromagnetically driven shutter for use in a photographic camera has blades driven by an electromagnetic drive source to move in vertical directions. The electrical power supply control means for the electromagnetic drive source is provided with means for detecting the photographic posture of the camera, whereby the output torque of the electromagnetic drive source is changed as the camera posture changes. This is done in order to insure that the speed of movement of the shutter blades is maintained constant regardless of whether or not the camera is positioned normally, or upside down.

REFERENCES:
patent: 3747495 (1973-07-01), Tenkumo et al.

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