Programmable vehicle anti-theft system

Details Programmable vehicle anti-theft system Programmable vehicle anti-theft system

1988-11-29

1991-02-05

Yusko, Donald J.

Communications: electrical

Continuously variable indicating

With meter reading

340825320, 340825340, H04B 100

Patent

active

049909061

ABSTRACT:
A vehicle anti-theft device is disclosed which includes an electronically erasable programmable read only memory (EEPROM) which stores a modifiable code which must be matched by an input code in order to start the vehicle. The ignition key includes a resistor pellet, engaged by contact in the ignition lock assembly, which is measured to provide the input code. To avoid problems associated with intermittent contact engagement with the resistor pellet, circuitry is provided to control the resistor measurement cycle.

REFERENCES:
patent: 4148372 (1979-04-01), Schroeder
patent: 4438426 (1984-03-01), Adkins
patent: 4672225 (1987-06-01), Hanisko et al.
patent: 4713660 (1987-12-01), Camenzind
patent: 4755815 (1988-07-01), Savoyet et al.
patent: 4791280 (1988-12-01), O'Connell et al.
patent: 4804856 (1989-02-01), Hanisko et al.

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