Photographic camera having an electric timer device

Claim 2

A photographic camera having an eleCtric shutter comprising: a shutter; a housing for the camera; a power supply unit mounted on a portion of said housing; power supply unit retainer means provided on a side wall of said housing for mounting said power supply unit; first detector means for detecting the casing of said power supply unit retained by said retainer means; shutter opening means; shutter closing means engageable with said detector means for starting the closing operation of the shutter; electromagnet means operatively associated with said shutter closing means; an electronic timer circuit having the output thereof connected with said electromagnet means for electrically effecting a time-counting operation and changing over the operation of said electromagnet means in accordance with the output at the end of said time-counting operation; said detector means having an engaging member movable into engagement and disengagement with said shutter opening means, said shutter closing means being released in response to said engaging member; said engaging member being displaced into disengaged position by said detector member when said power supply unit is mounted on said camera housing, and displaced into engaged position when said power supply unit is removed from said camera housing.

Claim 3

A photographic camera according to claim 1, wherein said camera housing includes a fixed shoe receiving means for mounting said power supply unit, said shoe receiving means being engageable with a shoe provided on said power supply unit.

Claim 4

A photographic camera according to claim 1, wherein said camera housing includes a side wall having retainer means carrying an electrode, and said power supply unit comprises a casing, a power supply battery contained in said casing, a second engaging member formed on one side wall of said casing and engageable with said retainer means, and an electrode led out to the surface of said second engaging member, said power supply unit being held by said retainer means of the camera with the aid of said second engaging member and supplying a current to the camera through said electrode.

Claim 5

A photographic camera according to claim 3, wherein said detector means includes a detector member operatively associated with said second engaging member, said detector member being projectedly formed on the surface of said retainer means, said detector member being adapted to be displaced into engagement with the surface of said power supply unit casing when said power supply unit is mounted on said camera, thereby displacing said second engaging member into disengaged position.

Claim 6

A photographic camera having an electric shutter comprising: a shutter; a housing for the camera; a power supply unit mounted on a portion of said housing; power supply unit retainer means provided on a side wall of said housing for mounting said power supply unit; first detector means for detecting the casing of said power supply unit retained by said retainer means; shutter opening means; shutter closing means engageable with said detector means for starting the closing operation of the shutter; electromagnet means operatively associated with said shutter closing means; an electronic timer circuit having the output thereof connected with said electromagnet means for electrically effecting a time-counting operation; said detector means having an engaging member movable into engagement and disengagement with said shutter opening means, said shutter closing means being released in response to said engaging member; said engaging member being displaced into disengaged position by said detector member when said power supply unit is mounted on said camera housing, and displaced into engaged position when said power supply unit is removed from said camera housing; second retainer means for retaining a flash unit on said camera housing; second detector means provided contiguously with said second retainer means and diSplaceable in engagement with the casing of said flash unit; aperture stop means; distance adjust means for the objective lens of said camera; means for controlling said aperture stop means by said distance adjust means, and changeover means controlled by said second detector means for enabling operation of said aperture stop control means when said flash unit is retained on said camera housing.

Claim 7

A photographic camera having an electric shutter comprising: a shutter; a housing for the camera; a power supply unit mounted on a portion of said housing; power supply unit retainer means provided on a side wall of said housing for mounting said power supply unit; first detector means for detecting the casing of said power supply unit retained by said retainer means; shutter opening means; shutter closing means engageable with said detector means for starting the closing operation of the shutter; electromagnet means operatively associated with said shutter closing means; an electronic timer circuit having the output thereof connected with said electromagnet means for electrically effecting a time-counting operation; said detector means having an engaging member movable into engagement and disengagement with said shutter opening means, said shutter closing means being released in response to said engaging member; said engaging member being displaced into disengaged position by said detector member when said power supply unit is mounted on said camera housing, and displaced into engaged position when said power supply unit is removed from said camera housing; second retainer means for retaining a flash unit on said camera housing; second detector means provided contiguously with said second retainer means and diSplaceable in engagement with the casing of said flash unit; aperture stop means; distance adjust means for the objective lens of said camera; means for controlling said aperture stop means by said distance adjust means, and changeover means controlled by said second detector means for enabling operation of said aperture stop control means when said flash unit is retained on said camera housing.

Claim 8

A photographic camera according to claim 5, wherein said first and second retainer means are common.

Claim 9

A photographic camera according to claim 6, wherein said second retainer means comprises a flash timing contact electrode.