Internal-combustion engines – Igniters – Sparkers
Patent
1976-08-24
1978-01-31
Myhre, Charles J.
Internal-combustion engines
Igniters
Sparkers
123198DC, 180114, 307 10AT, 340 64, 123198B, H02G 300, B60R 2500
Patent
active
040710076
ABSTRACT:
An anti-theft device for a motor vehicle includes a starter-connected ignition switch which has a first accessible terminal, and a second substantially non-accessible terminal connected to a third substantially non-accessible terminal of a voltage dropping means, such as a resistor. A relay has a coil and at least a pair contacts closable by operating the ignition switch, and is connected in series with a circuit breaker, the voltage dropping means, the ignition switch and a voltage source. The circuit breaker trips at a predetermined current setting, and the coil is designed to burn out at a current just exceeding the predetermined current. Periodically openable contact-means actuate the motor vehicle's engine and are energizable by the pair of contacts. The circuit breaker trips upon a thief shorting the accessible terminals, and the relay coil burns out upon the thief shorting the circuit breaker.
REFERENCES:
patent: 3614460 (1971-10-01), Hall
patent: 3628056 (1971-12-01), Buchanon
patent: 3634697 (1972-01-01), MacFarlane
patent: 3783303 (1974-01-01), Johnson
patent: 3784839 (1974-01-01), Weber
Lazarus Ira S.
Myhre Charles J.
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