Boots – shoes – and leggings
Patent
1983-03-10
1985-06-25
Yasich, Daniel M.
Boots, shoes, and leggings
73304C, 374172, 307118, G01F 2326, H01H 3500
Patent
active
045257922
ABSTRACT:
A fuel-gauging system has a capacitive probe mounted in a fuel tank and supplied with an alternating voltage V.sub.s from a drive unit. The output of the probe is rectified by a diode mounted in the tank, prior to supply to a measuring unit. The voltage V.sub.D across the diode varies with temperature and is measured periodically by reducing the input voltage V.sub.s by a known factor X. The voltage V.sub.D is calculated by the measuring unit from the two output currents I.sub.1 and I.sub.2 produced respectively at the two different voltages V.sub.s and V.sub.s /X. The capacitance and hence the depth of fluid is calculated using the known voltage V.sub.D across the diode. The drive unit has a transformer that is used to reduce the voltage periodically by switching between different tappings of its secondary windings.
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patent: 4437162 (1984-03-01), Kato
patent: 4471656 (1984-09-01), Sanders
Smiths Industries Public Limited Company
Yasich Daniel M.
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