Measuring and testing – Liquid level or depth gauge
Patent
1983-02-04
1985-08-27
Frankfort, Charles
Measuring and testing
Liquid level or depth gauge
73309, 73308, G01F 2300
Patent
active
045370613
ABSTRACT:
A level detecting device for detecting the level of liquid in a tank includes a displacer or float displaceable in response to the level of the liquid in the tank, an enclosure tube disposed on the tank and sealed thereagainst so that the exterior of the enclosure tube is isolated from the liquid in the tank and a variable transformer for detecting the displacement of the float. The transformer includes at least two windings disposed adjacent the outside of the enclosure tube and an elongate core disposed within the enclosure tube and coupled to the float so as to be movable therewith, the amount of magnetic coupling between the windings being dependent upon the position of the core in the enclosure tube. Means are provided for generating an output signal representing the amount of magnetic coupling between the windings to derive an indication of the level of the liquid in the tank. Since the float and core are isolated from the balance of the apparatus by the enclosure tube, the liquid cannot adversely affect the components of the detector, and hence the life and reliability of the apparatus is extended.
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patent: 4297698 (1981-10-01), Pauwels et al.
patent: 4322727 (1982-03-01), Zabler et al.
DeMeyer Roy W.
Kozi Martin F.
Frankfort Charles
Magnetrol International Incorporated
Schuster David R.
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