Switch operating device operatively associated with a reciprocally movable member
AssigneeNippon Kogaku K.K.
InventorKoichi Furuta
Life of this patent
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Abstract
A switch operating device for changing a switch from a first state to a second state at a first position of a reciprocating member during its stroke in one direction and for changing the switch from its second state to its first state at a different position during a reverse stroke of the reciprocating member. The reciprocating member may be the shutter release shaft of a camera, and the switch controlled by the operating device may be part of the circuit of a power-driven film advance mechanism. A safety device prevents improper operation of the switch.
Claims9
In a photographic camera having a power-operated film advance mechanism energized when the camera shutter is in its closed position upon the closing of a control switch, the closure of the control switch being controlled by a reciprocally movable member that releases the shutter of the camera only after the reciprocally movable member has been moved in one direction from an initial position and substantially beyond a predetermined location, a device for operating the control switch comprising:
- a. an actuating member operatively associated with the switch and having a first position in which the switch is maintained closed, but movable out of said first position for opening the switch;
- b. operating means for moving the actuating member out of its first position only when said reciprocally movable member has moved in said one direction to said predetermined location;
- and
- c. a holding member for holding the actuating member out of its first position until said reciprocally movable member returns in the opposite direction to substantially its initial position.
A switch operating device for changing the state of a switch between an open state and a closed state in response to reciprocating movement of a reciprocally movable member comprising:
- a. an actuating member operatively associated with the switch and having a first position in which the switch is maintained in one of said states but being movable out of said first position for changing the state of the switch to the other state;
- b. operating means responsive to movement of the movable member in one direction to a first location for moving the actuating member out of its first position;
- and
- c. a holding member holding the actuating member out of its first position until the movable member returns in the opposite direction to a second location different from its first location.
Dependencies are inferred from the claim text.