Fuel quantity gauge

Details Fuel quantity gauge Fuel quantity gauge

1979-12-27

1981-09-15

Goldberg, Gerald

Measuring and testing

Liquid level or depth gauge

Immersible electrode type

G01F 2326

Patent

active

042890284

ABSTRACT:
A capacitance type fuel quantity gauge for a fuel tank which includes a probe capacitor in the fuel tank having a capacitance which varies in accordance with the fuel level and connected by one conductor to the output of a Lo-Z oscillator, two oppositely polled diodes connected together and to the capacitor, the positive diodes connected by another conductor to a signal conditioner and the negative diode connected to the one conductor by an inductance, the one conductor connected to the oscillator output and to the signal conditioner by a capacitor and inductance, respectively, so that the one conductor carries both the Lo-Z signal and the DC negative signal.

REFERENCES:
patent: 3161054 (1964-12-01), Cohn
patent: 3375716 (1968-04-01), Hersch
patent: 3638491 (1972-02-01), Hart
patent: 3747407 (1973-07-01), Wallman

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