<p>There is disclosed an alarm unit incorporating a battery and buzzer adapted to sound whenever mains current to a protected appliance is disrupted. The unit incorporates a trigger device which is switched on whenever the loss of current is sensed.</p>
申请公布号
EP0109227(A1)
申请公布日期
1984.05.23
申请号
EP19830306660
申请日期
1983.11.02
申请人
VIDEO ALARMS & SYSTEMS COMPANY LIMITED
发明人
WEBB, ALAN;TOTTON, FREDERICK MALCOLM;FOWLES, KENNETH STEPHEN
