Vehicle automatic switching burglar alarm

摘要: Apparatus for arming and disarming a vehicle alarm in response to locking unlocking of an entranceway the has cylinder mounted housing adapted be rotated relative thereto by turning key inserted therein one direction said opposite entranceway. A slidable member signals that been armed. The is armed disarmed movement first cam fixedly on plurality switches other cylinder. engages arm when position another disarm position. second freely circumscribing relationship rotates upon with unauthorized thereby actuating switch sound alarm.