Electrically programmed shutter assembly

Details Electrically programmed shutter assembly Electrically programmed shutter assembly

1981-09-11

1983-07-26

Gonzales, John

G03B 924

Patent

active

043951040

ABSTRACT:
An electronically programmed shutter assembly for a camera including an oing ring and a closing ring with locking shutter blades activated by rotation of the rings is provided. The locking ring is held in position upon rotation of the opening ring by a holding member attached to a holding magnet. The holding member is prevented from releasing the closing ring until the opening ring has travelled a minimum distance and the holding magnet has been demagnetized in order to insure attainment of a minimal lens opening prior to closing of the shutter blades. Insuring minimal lens opening will prevent the closing ring from closing the shutter immediately upon activation of the opening ring under intensive lighting conditions.

REFERENCES:
patent: 4107705 (1978-08-01), Hashimoto et al.

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