Document Type and Number:
Japanese Patent JPS5421704
Kind Code:
Y2
Abstract:
A battery energized device such as the light measuring or automatic exposure control system of a camera includes a cylindrical housing for holding a battery having an end opening and a removable closure member. A switch is opened by the locked condition of the closure member and is in a closed condition when the closure member is retracted from its closed condition and a diode and an electric lamp are connected in series with the switch across terminals in the housing which engage the battery so that only when the battery is properly oriented in the housing the lamp is momentarily lit as the closure member is moved toward its fully closed position. The switch may include a resilient switch arm which is urged from its normally closed condition by a projection on the closure member as it is turned to its closed position or a pair of contacts on the receptacle are engaged by a conductor on the closure member only before the closure member is in its fully closed position.
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Application Number:
JP5564472U
Publication Date:
August 01, 1979
Filing Date:
May 13, 1972
Export Citation:
International Classes:
H02H11/00; G01R19/14; G03B7/26; H01M2/10; H01M6/50; (IPC1-7): H01M6/50; H01M2/10