Burglar alarm including a reed relay actuated in response to a vibrating magnet to produce an alarm signal,申请号US19870133229-传众专利搜索

Burglar alarm including a reed relay actuated in response to a vibrating magnet to produce an alarm signal

申请公布号：US4864087(A)

申请号：US19870133229

申请日期：1987.12.14

申请公布日期：1989.09.05

申请人：

CHEN, YU-HUA

发明人：CHEN, YU-HUA

分类号：H01H35/14;H01H36/00

主分类号：H01H35/14

摘要：The present disclosure is directed to an improved burglar alarm which is mounted on a base having a concaved space for receiving therein a ring-like magnet with an elongated resilient arm, vibratable as a result of external force, and a magnetic switch tube actuated in response to the vibrating magnet which changes either the magnet polarity or intensity of the magnetic force thereof so to produce signals to actuate a connected alarm apparatus.