Communications: electrical – Selective – Having indication or alarm
Patent
1979-08-24
1981-08-25
Waring, Alvin H.
Communications: electrical
Selective
Having indication or alarm
200 6125, B60C 2302
Patent
active
042862531
ABSTRACT:
A tire pressure sensing and alarm system having a sensor for each wheel of a vehicle, emitting an rf alarm signal upon sensing low pressure, and a receiver in the driver's compartment to give a visual and/or audible alarm upon receipt of the signal. The sensor has a pressure responsive piston and an adjustably positioned switch to be actuated by the piston.
REFERENCES:
patent: 2727221 (1955-12-01), Sprigg
patent: 3588815 (1971-06-01), Koonce
patent: 3697944 (1972-10-01), Murano
patent: 4048614 (1977-09-01), Shumway
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