发明授权
- 专利标题： Line current detector
- 专利标题（中）： 线路电流检测器
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申请号： US814608申请日： 1977-07-11
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公开(公告)号： US4158170A公开(公告)日： 1979-06-12
- 发明人: Henley F. Sterling , Donald A. Weir , Rodger G. George , John V. Baxter
- 申请人： Henley F. Sterling , Donald A. Weir , Rodger G. George , John V. Baxter
- 申请人地址： NY New York
- 专利权人： International Standard Electric Corporation
- 当前专利权人： International Standard Electric Corporation
- 当前专利权人地址： NY New York
- 优先权： GBX30136/76 19760720
- 主分类号： H04Q3/72
- IPC分类号： H04Q3/72 ; H04M3/22 ; H04M19/02 ; G01R31/00
摘要：
A line current detector for use in telecommunications systems to monitor line condition. The detector uses an optical or photo electric device whose input is modulated by line current. A photo transistor, electrically isolated from the line, senses the modulated output of the detector to produce a condition responsive output. The optical device is preferably a liquid crystal device. The output sensor is isolated from the line.
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