Camera with selector for either electromagnetic release or mecha

Details Camera with selector for either electromagnetic release or mecha Camera with selector for either electromagnetic release or mecha

1977-09-28

1978-10-03

Gellner, Michael L.

354204, G03B 1738, G03B 1742

Patent

active

041187245

ABSTRACT:
A camera includes a stroke change-over member which is in first position and a second position respectively when a shutter dial is set for electric exposure control mode and for mechanical exposure control mode. The stroke change-over member, when in the first position, restricts the stroke of the movement of a mechanical release initiating member and, when in the second position, allows the movement of the mechanical release initiating member beyond the restricted stroke, the movement being caused by depression of a shutter button. The camera further includes an electromagnetic release initiating member movable from a first to a second position in response to the depression of the shutter button and a locking member for locking the electromagnetic release initiating member at the first position when the shutter dial is set for mechanical exposure control. The electromagnetic release initiating member allows an electromagnetic release device to release the shutter mechanism when moved a short distance before the movement of the mechanical release initiating member is restricted by the stroke change-over member. The mechanical release initiating member, when moved beyond the restricted stroke, serves to retain the locking of a winding member by another locking member, thereby preventing accidental winding of a film and charging of the shutter mechanism with the shutter button kept depressed as well as allows a mechanical release device to release the shutter mechanism.

REFERENCES:
patent: 3800310 (1974-03-01), Umeda
patent: 3955209 (1976-05-01), Akiyama

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