Fluid level detector

Details Fluid level detector Fluid level detector

1979-08-20

1981-08-18

Goldberg, Gerald

Electric heating

Heating devices

Resistive element: igniter type

219441, 219506, 340622, F24H 106

Patent

active

042848784

ABSTRACT:
Fluid level detection means utilizing a thermally conductive element in the general shape of a cone, in one embodiment, in direct contact with fluid whose level is to be detected. A portion of the element, excluding the apex, is directly heated. A thermal sensor is bonded to the apex. When the fluid depletes such that the apex is exposed to air, the temperature in the immediate vicinity of the apex rises to a new point of equilibrium. The sensor converts this elevated temperature into a signal recognized by electronic circuitry as a flow fluid level. This signal may subsequently be used to provide visual or audible alarm.

REFERENCES:
patent: 2287583 (1942-06-01), Weeks
patent: 2468676 (1949-04-01), Liben
patent: 2657299 (1953-10-01), McNairy
patent: 2928037 (1960-03-01), Lawrence
patent: 3226528 (1965-12-01), Martin
patent: 3290484 (1966-12-01), Day
patent: 3485100 (1969-12-01), Petersen
patent: 3592059 (1971-07-01), Chilton
patent: 3851529 (1974-12-01), Andrews

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