Liquid-level detecting device

Details Liquid-level detecting device Liquid-level detecting device

1975-05-29

1976-08-31

Smith, Jr., David

Electricity: circuit makers and breakers

Float

Float and pressure

335208, 335146, H01H 3540

Patent

active

039782999

ABSTRACT:
A liquid-level detecting device comprises a float for moving in accordance with the liquid level, a permanent magnet mounted in said float and a reed switch which is fixed to a stationary member and arranged for opening and closing in accordance with the movement of said permanent magnet and a thermoferrite member which is provided near said permanent magnet. The thermoferrite member has a Curie point at a critical temperature where it loses its magnetism thereby cutting an affection of said permanent magnet to said reed switch.

REFERENCES:
patent: 3750064 (1973-07-01), Kato et al.
patent: 3846747 (1974-11-01), Arai et al.

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