Three stage pressure switch

Details Three stage pressure switch Three stage pressure switch

1986-10-06

1988-04-12

Tolin, G. P.

Electricity: circuit makers and breakers

Fluid pressure

Diaphragm

200 83S, 200 814, H01H 3534

Patent

active

047376040

ABSTRACT:
A pressure switch device for use in an air-conditioning system, specifically a three stage device capable of switching, for example, a combined low/high pressure switch, and an on/off switch for activating compressor and condenser elements of the system, respectively. The device includes an operating chamber, a yieldable plastic membrane having roll membrane faces for transmitting system pressure level changes to pistons, a leaf spring disc and levers activating pairs of switching contacts. Upon application of three different operating pressures, each of the pistons transmitting a different pressure level, the levers and lever joints having tension springs, operate to bias the switching contacts to open and closed positions, thereby activating or deactivating the system elements.

REFERENCES:
patent: 3631389 (1971-12-01), Elliott
patent: 3786210 (1974-01-01), Byam
patent: 4273976 (1981-06-01), Wolford et al.
patent: 4330695 (1982-05-01), Poling
patent: 4467155 (1984-08-01), Grudzien, Jr.

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