Photographic camera with electromagnetic actuator of the shutter

Details Photographic camera with electromagnetic actuator of the shutter Photographic camera with electromagnetic actuator of the shutter

1975-05-29

1977-03-15

Adams, Jr., Russell E.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific current responsive fault sensor

354 29, 354 60R, 354235, 361159, G03B 908

Patent

active

040127516

ABSTRACT:
A photographic camera shutter is moved to open and returned to its closed position by electromagnetic actuating means. A special electronic circuit is connected with said actuating means to energize the electromagnetic device with sufficient potential to cause a smooth and rapid opening movement which then decreases to a lower potential during the time interval that the shutter is to be maintained in its open position.

REFERENCES:
patent: 3205412 (1965-09-01), Winston
patent: 3396314 (1968-08-01), Corson et al.
patent: 3411045 (1968-11-01), Reyner
patent: 3466993 (1969-09-01), Fahlenberg et al.
patent: 3511157 (1970-05-01), Eloranta
patent: 3791278 (1974-02-01), Riber et al.

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