发明名称 |
Lighting failure detector for a luminaire |
摘要 |
A lighting failure detector for a luminaire which ascertains that a lamp is lit at night and indicates the result of detection includes a phase difference detector circuit for ascertaining the lighting of the lamp through voltage and current applied to the lamp, a timer operating in response to an output signal from the phase difference detector circuit, and an indicator operated in response to a time-up signal from the timer.
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申请公布号 |
US5311101(A) |
申请公布日期 |
1994.05.10 |
申请号 |
US19930028425 |
申请日期 |
1993.03.09 |
申请人 |
KAGATSU KABUSHIKI KAISHA |
发明人 |
NORIKI, TOSHITAKA;TANAKA, KAORU;SHINZAKI, HIROKI |
分类号 |
H05B37/03;H05B39/08;(IPC1-7):H05B37/02 |
主分类号 |
H05B37/03 |
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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