Device for indicating insufficient inflation pressure in vehicle

Details Device for indicating insufficient inflation pressure in vehicle Device for indicating insufficient inflation pressure in vehicle

1979-08-06

1981-06-09

Waring, Alvin H.

Communications: electrical

Selective

Having indication or alarm

200 6125, B60C 2302

Patent

active

042727553

ABSTRACT:
A device for indicating insufficient inflation pressure in vehicle tires and of the type comprising an emitter coil (6,7,8,9) and a receiver coil (16,17,18,19) housed on a fixed support of said vehicle so that they can coupled only by a first and second transfer coil (not illustrated) disposed in any wheel and connected in series with an electric contact operated by a transducer when the value of the pressure in said tire exceeds a minimum set value is described.
The main feature of said device is that it comprises memory means (47,75) and control means (57,58) connected with an output of memory means; and alarm means (76,77) connected with an output of said memory means; said control means being arranged to automatically activate said memory means so that they receive the signal received periodically by the receiver coil, only when said signal has a frequency exceeding a minimum set value.

REFERENCES:
patent: 3665387 (1972-05-01), Enabnit
patent: 3858174 (1974-12-01), Harris
patent: 4057783 (1977-11-01), Blanchier

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