发明授权
US4847719A Apparatus and method for protecting the contacts of an electrical switch
from current surges
失效
用于保护电气开关的触点免受电流浪涌的装置和方法
- 专利标题： Apparatus and method for protecting the contacts of an electrical switch from current surges
- 专利标题（中）： 用于保护电气开关的触点免受电流浪涌的装置和方法
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申请号： US153997申请日： 1988-02-09
-
公开(公告)号： US4847719A公开(公告)日： 1989-07-11
- 发明人: Max W. Cook , Wade E. Moose , David C. Steele
- 申请人： Max W. Cook , Wade E. Moose , David C. Steele
- 专利权人： Cook Max W,Moose Wade E,Steele David C
- 当前专利权人： Cook Max W,Moose Wade E,Steele David C
- 主分类号： G08B13/08
- IPC分类号： G08B13/08 ; G08B29/18 ; H01H3/00 ; H01H9/54 ; H01H36/00 ; H02H7/22
摘要：
The contacts of an electrical switch, such as a magnetic contact reed switch or a magnetic contact reed relay used in a burglar alarm system, are protected from being fused together by transient current surges. This protection is accomplished by providing a normally nonconductive shunting path in parallel with the switch. The shunting path includes a voltage responsive device which is biased to conduction in response to a current surge to thereby complete the shunting path and allow the current surge to bypass the switch.
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