Electricity: circuit makers and breakers – Fluid pressure – Diaphragm
Patent
1991-05-22
1992-08-18
Tolin, Gerald P.
Electricity: circuit makers and breakers
Fluid pressure
Diaphragm
73717, 73745, 200 82C, 200834, 340626, H01H 3534
Patent
active
051401134
ABSTRACT:
A differential pressure control provides a housing having a pair of opposing inlets for accepting lines having different fluid pressures therein. The inlets are sealably connected to a central chamber having a piston by means of diaphragms. The piston is joined to a pivoting lever having a free end that translates as the piston is moved by each of the diaphragms. Upon existence of a pressure inbalance, the free end is moved by the piston, tripping a switch that indicates the pressure imbalance. The lever includes an adjustable spring to vary the gain of the switch and further includes a pair of opposing stops that limit the lever's displacement to substantially match that of the throw of the switch.
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Tolin Gerald P.
United Electric Controls Company
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