Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...
Patent
1988-03-17
1989-04-18
Crosland, Donnie L.
Communications: electrical
Land vehicle alarms or indicators
Internal alarm or indicator responsive to a condition of the...
731464, 731465, 116 34R, 200 6122, B60C 2300
Patent
active
048231070
ABSTRACT:
A device and electric circuit mounted on a wheel of a vehicle and to transmit via bearings an electrical signal for measurement of parameters such as the pressure and temperature of the tire. The measurement is made based on the conduction state of a semiconductor element coupled to a sensor sensing the tire pressure and/or temperature. Specifically observed are three resistances of sufficient different values: the resistance of a semiconductor element in the on-state, a resistance R.sub.o two orders of magnitude greater than the preceding one and the internal resistance of at least one semiconductor element in the off-state. The sensor and circuit ar integrated in a standard valve. In one embodiment, it is possible to operate an electric element mounted on the wheel.
REFERENCES:
patent: 2063452 (1936-12-01), McDonnell
patent: 2235930 (1941-03-01), Huggins
patent: 2313247 (1943-03-01), Krow
patent: 3297984 (1967-01-01), Necker
patent: 3693149 (1972-09-01), Johnston
patent: 3757294 (1973-09-01), Schultz
patent: 4489599 (1984-12-01), Andrei-Alexandru et al.
Compagnie Generale des Establissements Michelin
Crosland Donnie L.
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