Electromagnetic releasing device
AssigneeNippon Kogaku K.K.
InventorHiroshi Hasegawa
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Abstract
In an electromagnetic releasing device for exciting a release magnet for a predetermined time after depression of a release button to thereby elect shutter release, there is provided a circuit which generates, in response to the depression of the release button, a signal whose time width is short independently of the depression time of the release button. The excitation of the release magnet is initiated by the signal from said circuit. With this circuit, one depression of the release button results in only one releasing operation.
Claims6
An electromagnetic releasing device for energizing a shutter release magnet, comprising a switch in series with said magnet for energizing said magnet when the switch is conductive, a bistable circuit having a first output connected to said switch for rendering said switch conductive when the bistable circuit is set in a first state, means responsive to actuation of a shutter release button for setting said bistable circuit in said first state, and means independent of whether said button remains actuated for resetting said bistable circuit in a second state a predetermined time after it is set in said first state and for thereby rendering said switch non-conductive, said resetting means comprises a timing circuit connected to a second output of said bistable circuit.
Dependencies are inferred from the claim text.