Liquid level detector

Details Liquid level detector Liquid level detector

1986-04-21

1989-07-18

Yasich, Daniel M.

Measuring and testing

Liquid level or depth gauge

Float

73317, 200 84C, 340625, G01F 2332, H01H 3518

Patent

active

048481513

ABSTRACT:
The present invention provides an automatic cut off switch which grounds the magneto-spark plug circuit of a small gasoline engine shutting the engine down when the quantity of lubricating oil within the sump falls below a predetermined quantity. The switch is operated by a balance beam float assembly housed within a protective shroud. The protective shroud acts to collect a relatively stable pool of oil, representative of the quantity of oil remaining in the sump, for activation of the balance beam float. Upon refilling of the oil sump the switch automatically resets thereby permitting re-start of the engine.

REFERENCES:
patent: 2627178 (1953-02-01), Hayward et al.
patent: 3196389 (1965-07-01), Heidner
patent: 3605086 (1971-09-01), Triska
patent: 3868485 (1975-02-01), Sykes et al.
patent: 4037481 (1977-07-01), Callahan
patent: 4353253 (1982-10-01), Callahan
patent: 4481389 (1984-11-01), Johnson
patent: 4610165 (1986-09-01), Duffy et al.

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