Battery conservation by control of the charging circuit for a bu

Details Battery conservation by control of the charging circuit for a bu Battery conservation by control of the charging circuit for a bu

1980-01-25

1981-10-20

Hix, L. T.

354133, 354145, 354266, G03B 708, G03B 1505

Patent

active

042957192

ABSTRACT:
A camera system has a self-contained flash unit where the supply of current from a battery to the flash unit charging capacitor is discontinued immediately after the level of charge on the capacitor reaches a predetermined full charge level and charging of the capacitor is controlled as a function of existing light conditions. The shutter release member is movable from a rest position through an intermediate position to a fully depressed position. A pivotally mounted holder member which is movable in response to the movement of the shutter release member carries an electromagnet and a pivotally mounted magnet armature which moves into and out of contact with the electromagnet in response to the energization and deenergization of the electromagnet to latch and release the shutter.

REFERENCES:
patent: 3645189 (1972-02-01), Rentschler
patent: 3833915 (1974-09-01), Tanaka

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