Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1994-03-07
1996-01-09
Peng, John K.
Communications: electrical
Condition responsive indicating system
Specific condition
340624, 340618, 335 17, 335 29, G08B 2100
Patent
active
054832276
ABSTRACT:
A liquid level controller comprises of a control circuit, a control box, a sump pump, and a liquid level indicating means, the liquid level indicating means comprising a high level indicating device and an impulse indicating device, the high level indicating device and the impulse indicating device comprising pipe bodies, magnetic switches, floating element or impulse element. The pipe body of the impulse indicating device has a connecting pipe connected to the side thereof. The magnetic switches located on the top of the pipe bodies and connected to the control circuit with electric wires. When the liquid surface raises and buoys the floating element of the high level indicating device to contact the magnetic switch, the magnetic switch produces a signal to the control circuit and the sump pump is started to draw the liquid out of the tank. The liquid is drawn through the impulse indicating device, the impulse element, of the impulse indicating device is raised by the buoyancy of the liquid to contact the magnetic switch, then the sump pump is controlled by the impulse indicating device and the liquid is drawn out until the impulse force of liquid is not strong enough to support the impulse element, that is, the liquid is completely drawn out.
REFERENCES:
patent: 2625107 (1953-01-01), Schaefer
patent: 2844678 (1958-07-01), Nielsen
patent: 3437771 (1969-04-01), Nusbaum
patent: 4037193 (1977-07-01), Uemura
patent: 4165204 (1979-08-01), Nielsen
patent: 5124686 (1992-06-01), White et al.
Kuo Teh-Chuan
Wu Kao-Ching
Lieu Julie
Peng John K.
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