Measuring and testing – Liquid level or depth gauge
Patent
1988-05-26
1990-01-09
Cuchlinski, Jr., William A.
Measuring and testing
Liquid level or depth gauge
324207, 336183, G01F 2376, G01R 3300
Patent
active
048919802
ABSTRACT:
A liquid level gauge comprising a core disposed inside a liquid container that has a cross sectional configuration that varies in the direction of its height, the core extending in the vertical direction and isolated from the liquid, a coil wound around the core in the direction of the length of the core, the coil comprising a densely wound portion formed at one end of the core and a thinly wound portion wound around the remaining part of the core, a conductor ring disposed around the outer circumference of the coil and is movable in the direction of the length of the coil according to the liquid level inside the container, a detecting portion that detects the change in the inductance of the coil according to the displacement of the conductor ring, a transforming portion that transforms the change in the inductance of the coil to a change in an electric signal, and a display portion that displays the quantity of the liquid inside te container, corresponding to the electric signal, the thinly wound portion having a winding density that varies in steps along the length of the core and the display portion displaying a value proportional to the quantity of the liquid inside the container.
REFERENCES:
patent: Re23844 (1954-06-01), Codon
patent: 620027 (1889-02-01), Fuld
patent: 2648982 (1953-08-01), Condon
patent: 2752543 (1956-06-01), Smith
patent: 3074039 (1963-01-01), Ford
patent: 4627280 (1986-12-01), Hayashi
patent: 4730489 (1988-03-01), Hoekstra
Hayashi Chikahisa
Hirose Yoshikazu
Kawai Makoto
Terayama Tatsuya
Cuchlinski Jr. William A.
Hohenshell Teffrey J.
Toyoda Gosei Co,., Ltd.
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