发明名称 |
Controlling circuit for electric shutters |
摘要 |
A controlling circuit for electric shutters wherein, in an electric shutter adapted to start a shutter closing moton by energizing a driving coil with a discharge current from a capacitor, the capacitor is made to be discharged by a voltage drop detecting circuit provided so that the shutter may be positively closed even in case a current source switch is opened by an unexpected accident in the course of an exposure controlling operation.
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申请公布号 |
US4143958(A) |
申请公布日期 |
1979.03.13 |
申请号 |
US19770838225 |
申请日期 |
1977.09.30 |
申请人 |
COPAL COMPANY LIMITED |
发明人 |
ISHIGURO, YASUO;WAKAZONO, KENJI |
分类号 |
G03B9/62;(IPC1-7):G03B17/40 |
主分类号 |
G03B9/62 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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