发明名称 |
Apparatus for preventing malfunction of an electric shutter device |
摘要 |
Apparatus for preventing a malfunction of an electric shutter device is disclosed which comprises a source voltage detection circuit and a demagnetizing device connected with the output terminal of the detection circuit. The source voltage detection circuit produces a signal at its output terminal when the detected voltage is below a certain determined value. The device connected with the output terminal of the detection circuit is responsive to the signal to demagnetize the magnet of the shutter device.
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申请公布号 |
US4310230(A) |
申请公布日期 |
1982.01.12 |
申请号 |
US19800126349 |
申请日期 |
1980.03.03 |
申请人 |
NIPPON KOGAKU K.K. |
发明人 |
MOTOORI, RYUZO |
分类号 |
G03B7/083;G03B7/00;G03B7/26;G03B9/08;(IPC1-7):G03B17/20 |
主分类号 |
G03B7/083 |
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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