The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 15, 1981
Filed:
Dec. 27, 1979
Irwin Wallman, Shelburne, VT (US);
Simmonds Precision Products, Inc., Tarrytown, NY (US);
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.