Electrical transmission or interconnection systems – Vehicle mounted systems – Automobile
Patent
1995-11-22
1997-08-12
Elms, Richard T.
Electrical transmission or interconnection systems
Vehicle mounted systems
Automobile
180287, 340426, B60R 2504
Patent
active
056568665
ABSTRACT:
An ignition coil operatively coupled with an engine and an electronic ignition system coupled to an electric power supply and activated by a key, the ignition-disabling anti-car jacking device including a relay mechanism coupled between the ignition coil and the ignition system of the vehicle and with the relay mechanism being enabled for energizing the ignition coil when the ignition system is activated with the key and further being disabled for de-energizing the ignition coil when the ignition system is deactivated with the key; a first timer mechanism for transmitting a first switching signal after a first predetermined period of time; a second timer mechanism for transmitting a second switching signal after a second predetermined period of time; a first switching mechanism coupled between the first timer mechanism and the second timer mechanism and responsive to receipt of the first switching signal from the first timer mechanism for activating the second timer mechanism; a second switching mechanism coupled between the second timer mechanism and the relay mechanism and being responsive to the receipt of the second switching signal for disabling the relay mechanism and further, enabling the relay mechanism when the second switching signal is not received; and a manually-operated third switching mechanism being responsive to a manual application of an external grounding contact applied thereto by a driver of the vehicle for deactivating the timer mechanisms and thereby precluding the relay mechanism from being disabled.
REFERENCES:
patent: 4507644 (1985-03-01), Abrahamson
patent: 5307048 (1994-04-01), Sonders
patent: 5315286 (1994-05-01), Nolan
patent: 5412370 (1995-05-01), Berman et al.
patent: 5477206 (1995-12-01), Rodriguez, Sr.
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