Vehicle antitheft system

Details Vehicle antitheft system Vehicle antitheft system

1992-07-08

1994-04-19

Crosland, Donnie L.

Communications: electrical

Land vehicle alarms or indicators

Of burglary or unauthorized use

3404255, 340426, 307 102, 307 103, 307 104, B60R 2510

Patent

active

053049799

ABSTRACT:
A solid state computer circuit system is provided that senses the state of the ignition switch, setting a lock out circuit to prevent the car from being started if a hidden switch (or other enabling circuit) is not activated. There is a solid state timing circuit locking out the ignition system automatically after a predetermined time when the ignition switch is turned off (typically thirty seconds). The system is actuated with a hidden switch (or an electronic device like a garage door opener or a digital key pad with an alarm circuit sounding an alarm if the wrong code is input or a foreign item is used in an effort to wrongfully enable the basic system circuit).

REFERENCES:
patent: 4736113 (1988-04-01), Leu
patent: 5041810 (1991-08-01), Gotanda
patent: 5218338 (1993-06-01), Chang

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