Liquid level indicating apparatus

Details Liquid level indicating apparatus Liquid level indicating apparatus

1987-03-02

1988-10-04

Yasich, Daniel M.

Measuring and testing

Liquid level or depth gauge

Thermal type

307310, 374142, G01F 2322, G01K 114

Patent

active

047748389

ABSTRACT:
Electrical apparatus for providing an indication of the level of the contents of a container comprises a temperature sensing unit, means for mounting, e.g. detachably, the temperature sensing unit against a container wall and visual and/or audible indicator means. The temperature sensing unit comprises a temperature sensing circuit including at least two spaced apart temperature sensors and an indicator circuit for energizing the indicator means. In use, energization of the indicator means occurs when the temperature sensors detect at least a minimum temperature difference.

REFERENCES:
patent: 3161050 (1962-10-01), Exner
patent: 3278757 (1966-10-01), Ragen
patent: 3914950 (1975-10-01), Fletcher et al.
patent: 3955416 (1976-05-01), Waiwood
patent: 3992668 (1976-11-01), Finger
patent: 4065967 (1978-01-01), Beeston
patent: 4300048 (1981-11-01), Barbier et al.
patent: 4307606 (1981-12-01), Johnson
patent: 4331888 (1982-05-01), Yamauchi
patent: 4358955 (1982-11-01), Rait
patent: 4395139 (1983-07-01), Namiki et al.
patent: 4424461 (1984-01-01), Taguchi et al.
"A Superconducting (Nb-Ti) Liquid Helium Level Detector", K. R. Efferson, Advance in Cryogenic Engineering, vol. 159, 10-18 Jun. 1969, pp. 124-131.

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