Electricity: circuit makers and breakers – Fluid pressure – Piston
Patent
1980-01-04
1982-04-06
Tolin, Gerald P.
Electricity: circuit makers and breakers
Fluid pressure
Piston
200 83S, H01H 3538
Patent
active
043237428
ABSTRACT:
A switch which is actuated when a preselected fluid pressure differential is exceeded. A piston exposed to the pressure differential carries a plunger which contacts a lever arm mounted on a shaft. A spring normally prevents the shaft from turning but is overcome when an excessive pressure differential is applied across the piston. A switch arm mounted on the shaft actuates the switch in response to turning of the shaft.
REFERENCES:
patent: 510921 (1893-12-01), Merritt
patent: 697273 (1902-04-01), Plumtree
patent: 2096492 (1937-10-01), Hewitt
patent: 2244402 (1941-06-01), Powers
patent: 2749536 (1956-06-01), Sperling
patent: 2803718 (1957-08-01), Bloom
patent: 2895024 (1959-07-01), Brown
patent: 2982830 (1961-05-01), Schaefer
patent: 3930134 (1975-12-01), Rostron
patent: 4004839 (1977-01-01), Burgdorf
patent: 4182941 (1980-01-01), Tashiro
SOR, Inc.
Tolin Gerald P.
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