Measuring and testing – Liquid level or depth gauge
Patent
1975-09-17
1977-02-22
Swisher, S. Clement
Measuring and testing
Liquid level or depth gauge
73297, 340244R, G08B 2100, G01F 2300
Patent
active
040086127
ABSTRACT:
A liquid quantity detecting device comprises a liquid container, liquid circulating means disposed within the liquid container, and means for detecting bubbles created by the liquid circulating means when the liquid level has been lowered. Thus, decrease in quantity of liquid may be detected in accordance with the detection signal from the detector means.
REFERENCES:
patent: 2722678 (1955-11-01), Kelly
Kimura Yoshimasa
Komiya Yutaka
Nagaoka Tateki
Canon Kabushiki Kaisha
Swisher S. Clement
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