Title: Liquid level controller

Abstract: A durable, long lasting liquid level controller utilizing an encapsulated, low current, solid state circuit, projecting metal probes arranged to minimize erroneous readings due to liquid adhering to the probes and a wave discriminating means as part of the encapsulated solid state circuitry, said wave discriminating means serving to eliminate false signals resulting from splash or wave action.

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Inventors: Fuller, Mark W. (Palo Alto, CA, US)

Application Number: 963394
Filing Date: 1978-11-24
Publication_date: 1980-01-08
Assignee:
Primary Class(es): 137/392 73/304R, 340/620
Other Classes:
US Patent Ref:

2839742	Jun, 1958	Sumner	340/244.
2925101	Feb, 1960	Dunham	137/392.
3584643	Jun, 1971	Burke	137/392.
3602251	Aug, 1971	Hill	137/392.
3641544	Feb, 1972	Radin	340/244.
3657556	Apr, 1972	Foster	73/304.
3670765	Jun, 1972	Haynes	137/392.
3741683	Jun, 1973	McTamaney et al.	137/392.
3894240	Jul, 1975	Rose	250/577.

Other Refs: 448465

May, 1948	CA

Primary Examiner: Schwadron, Martin P.
Assistant Examiner: Walton, G. L.
Attorney: Criddle; B. Deon