Vehicle automatic switching burglar alarm

Details Vehicle automatic switching burglar alarm Vehicle automatic switching burglar alarm

1984-03-20

1987-01-06

Ruehl, Charles A.

Communications: electrical

Selective

Having indication or alarm

340542, 307 10AT, 70388, 200 6166, B60R 2500

Patent

active

046350357

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

REFERENCES:
patent: 3552160 (1971-01-01), Kleebauer
patent: 3569930 (1971-03-01), Hirama
patent: 3587081 (1971-06-01), Hawkins et al.
patent: 3797004 (1974-03-01), Muessel et al.
patent: 3936673 (1976-02-01), Kelly et al.
patent: 4383242 (1983-05-01), Sassover et al.

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