Fluid handling – Liquid level responsive or maintaining systems
Patent
1984-03-13
1986-11-18
Walton, George L.
Fluid handling
Liquid level responsive or maintaining systems
119 5, 137393, 137434, 200 84R, 417 40, F16K 3118, F16K 3300
Patent
active
046229914
ABSTRACT:
For detecting small level changes in an aquarium, there is proposed a sensor which, in the operable condition, comprises a substantially enclosed sensor container (18), into which aquarium water can be sucked from the surface via an overflow edge (56) and from the aquarium interior via a suction port (46) with a downstream overflow tube (52). The sucking of the water over these two paths is effected by a circulating pump (26) of the aquarium filter system via an outlet port (32) of the sensor container (18). The liquid level in the sensor container is monitored by a level sensor (64). The upper edge of the overflow tube (52) is located beneath the overflow edge of the container wall by a specified distance. If water losses from the aquarium arise, the water surface in the sensor container drops to a considerably greater extent than the water surface in the aquarium external chamber does.
REFERENCES:
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patent: 2981228 (1961-04-01), Brandano
patent: 3303819 (1967-02-01), Wade
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patent: 3512646 (1970-05-01), Willinger
patent: 4206719 (1980-06-01), Faris
patent: 4275995 (1981-06-01), Taylor
patent: 4399338 (1983-08-01), Jones
Philpitt Fred
Walton George L.
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