Liquid quantity sensor of capacitor type and method of producing

Details Liquid quantity sensor of capacitor type and method of producing Liquid quantity sensor of capacitor type and method of producing

1983-08-08

1985-05-21

Griffin, Donald A.

Electricity: electrical systems and devices

Electrostatic capacitors

Variable

73304C, H01G 528, G01F 2300

Patent

active

045190127

ABSTRACT:
A liquid quantity sensor has at least one pair of electrode plates which are vertically disposed in a vessel, e.g. an automotive fuel tank, in a spaced and parallel arrangement so as to form a capacitor. To enhance accuracy and uniformity of the distance between the two electrode plates, a plurality of annular, synthetic resin insulating spacers having a thickness that corresponds with the aforementioned distance are interposed between the two electrode plates in such an arrangement that the distance between adjacent pairs of spacers is between 50 mm and 80 mm. The two electrode plates are fastened to each other at each location where one of the spacers is present by tightening a fastening means such as a rivet inserted through holes formed in the two electrode plates such that each spacer is subjected to a compressive load between 40 and 100 kgf.

REFERENCES:
patent: 2426252 (1947-08-01), Thomson
patent: 3335344 (1967-08-01), Kling
Ein Brennstoffmengen-Anzeigegerat mit kapazitivem Geber fur Flugzeugtanks in Electronics, 1957, No. 12, pp. 360-363.

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