Vehicular protective system

Details Vehicular protective system Vehicular protective system

1979-05-16

1980-09-09

Waring, Alvin H.

Communications: electrical

Selective

Having indication or alarm

307 10AT, 180287, B60R 2504

Patent

active

042220343

ABSTRACT:
An ultrasonic transmitter is combined with an ignition key of an automotive vehicle and is manually operable to produce and transmit an ultrasonic signal. An ultrasonic receiver has an electronic switch electrically connected to at least one of the components of the electrical system of the vehicle and between said one of said components and another one of the components of the electrical system. The switch is open upon the failure of the receiver to receive the signal transmitted by the transmitter thereby preventing the operation of the electrical system and the operation of the vehicle. The receiver closes the switch upon receiving the signal transmitted by the transmitter thereby permitting the operation of the electrical system and the operation of the vehicle.

REFERENCES:
patent: 4125826 (1978-11-01), Rasmussen et al.

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