Synchronizing device for electronic program shutter

Details Synchronizing device for electronic program shutter Synchronizing device for electronic program shutter

1979-03-09

1980-06-17

Griffin, Donald A.

354 34, 354230, G03B 716, G03B 908

Patent

active

042081114

ABSTRACT:
In an electronic program shutter having sectoral shutter blades functioning in varying both the aperture and the exposure time corresponding to the brightness of the field, a synchronizing device according to the present invention comprises a sectoral shutter blade control lever which is oscillatable and capable of opening and closing the sectoral shutter blades and is normally urged in the direction that the sectoral shutter blades keep the aperture closed, a driving member which travels in one direction according to the shutter release operation, an actuating lever rotatable about a shaft fitted on the driving member and interlocked with the sectoral shutter blade control lever, an electromagnet which is unmagnetized at an exposure completion signal given by an exposure control circuit, and an armature which operates a flash light switch and cancels the engagement between the sectoral shutter blade control lever and the actuating lever when the electromagnet is unmagnetized and the attraction by the electromagnet is cancelled.

REFERENCES:
patent: 3535991 (1970-10-01), Kitai
patent: 3613533 (1971-10-01), Kitai
patent: 3838433 (1974-09-01), Imura
patent: 4107705 (1978-08-01), Hashimoto et al.

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