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US 4,054,763 AGranted
Pressure switch and gauge
AssigneeFurnas Electric Company
InventorDale F. Willcox
Life of this patent
Estimating the term…
Abstract
A pressure switch incorporates a pressure gauge in which the indicator actuator is operatively connected to an element movable in response to pressure variations in the system being monitored, which element is also part of the switch operating mechanism.
Claims3
A pressure switch and indicator comprising:
- a supporting frame having a bottom and side walls upstanding therefrom on opposite sides thereof;
- said bottom wall having an opening therein;
- a resilient diaphragm secured to said bottom wall over said opening;
- a pressure lever pivoted at one end on said bottom wall and in contact with said diaphragm at a point intermediate its length;
- adjustable biasing means mounted in said housing and engaging the free end of said pivoted pressure lever to urge it toward said bottom wall, a switch mechansim mounted in said frame;
- a push rod in contact with said pivoted pressure lever and movable therewith in response to upward movement of said diaphragm to operate said switch mechanism;
- a gauge mounted on the outside of a side wall of said frame and including indicia thereon;
- an indicator having a pointer extending toward said indicia;
- a shaft portion extending through said side wall, and a crank portion overlying the free end of said pivoted pressure lever and a clip attached to said free end and trapping said crank portion to cause said crank portion to rotate said shaft portion and said pointer portion to move past said indicia as said diaphragm flexes in response to variations in pressure thereon.
6 more elements
Dependencies are inferred from the claim text.