Communications: electrical – Selective – Having indication or alarm
Patent
1978-05-12
1979-01-30
Swisher, S. Clement
Communications: electrical
Selective
Having indication or alarm
731465, 340539, B60C 2304
Patent
active
041375203
ABSTRACT:
A tire pressure is measured by an electrical strain gage and a telemetering transmitter micro chip process and transmitter signal from a motor vehicle tire, indicating an abnormal tire pressure range. The above described tire pressure indicator includes a pressure tight bellows container which is preloaded to a selected gas pressure, and which contains the strain gage, telemetering signal transmitter and a battery power source. The tire pressure indicator is secured and disposed in the tire interior, mounted on the tire air pressure valve stem. A simple signal receiver warns of abnormal tire pressure, receiving the transmitted signal from any tire pressure indicator disposed in a single vehicle tire set.
REFERENCES:
patent: 2727221 (1955-12-01), Sprigg
patent: 3533063 (1970-10-01), Garcia
patent: 3538271 (1970-11-01), Mirsky
patent: 3568145 (1971-03-01), Dikoff
patent: 3588813 (1971-06-01), Robinson
patent: 3588814 (1971-06-01), Furlong
patent: 3787806 (1974-01-01), Church
patent: 4048614 (1977-09-01), Shumway
Corr Denis E.
Jones, Sr. J. L.
Swisher S. Clement
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