Electrical transmission or interconnection systems – Vehicle mounted systems – Automobile
Patent
1991-10-16
1993-03-02
Pellinen, A. D.
Electrical transmission or interconnection systems
Vehicle mounted systems
Automobile
180287, 307 106, B60R 2504
Patent
active
051912287
ABSTRACT:
An antitheft device is provided for use in conjunction with a vehicle having an engine, an electrical system with an electrical starter, and a battery. The antitheft device includes a conventional alarm system which detects an unauthorized attempt to enter or start the vehicle motor and which generates an output signal representative thereof. A normally closed switch is connected in series between the battery and the vehicle electrical system. A switch actuator circuit is electrically connected to the alarm system and, upon receipt of an alarm signal from the alarm system, actuates the switch to the open position thereby disconnecting the vehicle battery from the engine starter and preventing unauthorized vehicle ignition. The switch actuator circuit also includes circuitry which detects an engine running condition which prevents actuation of the switch at any time that the engine is operating. In an alternate embodiment of the invention, the device automatically disconnects the battery from the ignition system whenever the ignition is turned off and, similarly, reconnects the battery whenever an authorized use of the vehicle is initiated.
REFERENCES:
patent: 3692965 (1972-09-01), Gardner
patent: 3833097 (1974-09-01), Holst
patent: 4209709 (1980-06-01), Betton
patent: 4887064 (1989-12-01), Drori et al.
patent: 4958084 (1990-09-01), Carlo et al.
Elms Richard
Pellinen A. D.
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