Electromagnetically driven shutter

Details Electromagnetically driven shutter Electromagnetically driven shutter

1980-06-20

1981-05-19

Griffin, Donald A.

G03B 908

Patent

active

042681537

ABSTRACT:
A slit exposure shutter which has an electromagnetic drive source and is arranged to have shutter blades moved by rotation of a rotor not exceeding a half turn to perform exposure effecting and returning travels. The weight of the shutter blades and that of the rotor are arranged to be approximately in balance by having the rotation shaft of the rotor eccentrically disposed in a position deviating from the center of the rotor.

REFERENCES:
patent: 2390216 (1945-12-01), Guedon
patent: 3056341 (1962-10-01), Grey
patent: 3455219 (1969-07-01), Burgarella
patent: 3638550 (1972-02-01), Hereford

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