Electromagnetic camera shutter

Details Electromagnetic camera shutter Electromagnetic camera shutter

1996-04-04

1997-03-04

Mathews, A. A.

Photography

Camera detail

Shutter

396491, G03B 936

Patent

active

056084846

ABSTRACT:
An electromagnetic camera shutter including an electrically conductive shutter blade and electrically conductive springs for urging the shutter blade into a first or a second position from a compressed position between the first and the second position. A permanent magnet is associated with said shutter blade and a control device applies a current through the springs and the shutter blade in a first direction to generate an electromagnetic field between the shutter blade and the permanent magnet so as to move the shutter blade from the first position to the second position and alternately, applies a current through the springs and the shutter blade in a second direction so as to move the shutter blade from the second position to the first position.

REFERENCES:
patent: 3049982 (1962-08-01), Kendall
patent: 3282187 (1965-03-01), Cassidy et al.
patent: 3797919 (1974-03-01), McClenahan
patent: 4024552 (1977-05-01), Kondo
patent: 4333722 (1982-06-01), Lee
patent: 4514064 (1985-04-01), Kurosu et al.
patent: 4514065 (1985-04-01), Carrera
patent: 4650307 (1987-03-01), Capobianco et al.
patent: 4671638 (1987-06-01), Capobianco et al.
patent: 4724452 (1988-02-01), Mody et al.

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