Tire pressure warning devices

Details Tire pressure warning devices Tire pressure warning devices

1976-01-08

1978-12-19

Yusko, Donald J.

Communications: electrical

Selective

Having indication or alarm

731465, 200 6125, B60C 2302

Patent

active

041308174

ABSTRACT:
A vehicle tire pressure warning system includes a rotating assembly and a non-rotating assembly. The non-rotating assembly includes a magnet and a pick-up coil. The rotating assembly includes a series circuit comprising a coil, a magnetically operated switch and a pressure actuated switch which is closed when the tire pressure is adequate. The magnetic switch is closed periodically by the magnet and current is induced in the coil. When the magnetic switch re-opens the coil is coupled to the pick-up coil and the flux collapse in the coil causes a signal to be induced in the pick-up coil. The absence of such a signal indicates that the tire pressure is too low and is detected by a counter system for each wheel which counts the number of pulses from all the wheels between pulses from the associated wheel.

REFERENCES:
patent: 3581277 (1971-05-01), Beatty, Jr. et al.
patent: 3613075 (1971-10-01), Griffiths et al.
patent: 3691524 (1972-09-01), Frost et al.
patent: 3930224 (1975-12-01), Whiteing et al.
patent: 3961309 (1976-06-01), Eddy

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