Measuring and testing – Liquid level or depth gauge – Float
Patent
1995-02-22
1996-10-08
Chilcot, Richard
Measuring and testing
Liquid level or depth gauge
Float
73314, G01F 2346
Patent
active
055620035
ABSTRACT:
An apparatus is provided for detecting the level of a liquid in a tank. The apparatus is designed to be connected to a controller that controls a pump so as to switch the pump on when the liquid level reaches a maximum authorized level and to stop operation of the pump when the level of the liquid has gone back down to a minimum level. The apparatus includes a float that is lifted by the liquid and that is guided vertically. The apparatus also includes a magnet that is carried by the float, and at least two switches each having contacts sealed in a capsule. Each switch is fixed in a horizontal fashion to a plate so as to correspond to a predetermined liquid level, and each switch turns on an electrical circuit connected to the controller when the switch is in the magnetic field of the magnet. The plate is disposed in a vertical plane that is parallel to and in close proximity to the displacement of the float.
REFERENCES:
patent: 4371000 (1983-02-01), Shinoda
patent: 4395605 (1983-06-01), Weston
patent: 4497205 (1985-02-01), Zulauf et al.
patent: 4617806 (1986-10-01), Sakai et al.
patent: 4748300 (1988-05-01), Anderson
patent: 4771804 (1988-09-01), Morales
patent: 5156048 (1992-10-01), DeFigueiredo et al.
Chilcot Richard
Noori Max
Sauermann Industrie
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