Float-type liquid level switch assembly with light emitting...

Details Float-type liquid level switch assembly with light emitting... Float-type liquid level switch assembly with light emitting...

2006-02-14

2006-02-14

Friedhofer, Michael A. (Department: 2832)

Electricity: circuit makers and breakers

Float

Float and pressure

C200S310000, C335S207000, C073S319000

Reexamination Certificate

active

06998552

ABSTRACT:
A float-type liquid level switch includes a main body, a float, a magnetic reed switch, and a light emitting element; the float has a magnet joined thereto, and is displaceable along a length of the main body; the magnetic reed switch and the light emitting element are held in the main body; both the magnetic reed switch and the light emitting element are connected to a control circuit to form a circuit; when the float is moved to such a position by buoyancy of liquid in a container that the magnet is near to, and activates the magnetic reed switch, the light emitting element will be powered to produce light, which will travel out of the main body to indicate that liquid level reaches a certain point.

REFERENCES:
patent: 3545272 (1970-12-01), McGill
patent: 3982087 (1976-09-01), Bachman
patent: 4730491 (1988-03-01), Lew
patent: 5025827 (1991-06-01), Weng
patent: 5829303 (1998-11-01), Fraser

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