Liquid flow switch and method of using same

Details Liquid flow switch and method of using same Liquid flow switch and method of using same

1984-06-12

1985-08-06

Scott, J. R.

Electricity: circuit makers and breakers

Fluid pressure

Flow-responsive type

200 819M, 200 84C, H01H 3538

Patent

active

045338027

ABSTRACT:
A switch responsive to changes in flow rate of a flow of liquid including a chamber with a liquid flow inlet and outlet at an upper level and a restricted orifice at a lower level for continuously bleeding liquid from the chamber, such that the liquid level in the chamber rises when the inlet flow rate exceeds the bleed rate but falls when the bleed rate exceeds the inlet flow rate. A float-type level sensing switch is disposed in the chamber for producing a signal, representative of a change in inlet flow rate, when the liquid level in the chamber passes through a predetermined level intermediate the outlet and the orifice. An adjusting element such as a screw projecting transversely into the orifice may be provided to enable variation of orifice cross-sectional area thereby to set the bleed rate at a desired value.

REFERENCES:
patent: 2791657 (1957-05-01), Bloxsom et al.
patent: 3327079 (1967-06-01), Widl
patent: 3431375 (1969-03-01), Hotchkiss
patent: 3947813 (1976-03-01), Uemura et al.
patent: 3958092 (1976-05-01), Hoover
patent: 4365125 (1982-12-01), Keller

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