Electricity: circuit makers and breakers – Fluid pressure – Diaphragm
Patent
1978-12-21
1980-12-02
Tolin, Gerald P.
Electricity: circuit makers and breakers
Fluid pressure
Diaphragm
200 83L, 73729, H01H 3532
Patent
active
042373549
ABSTRACT:
A pressure switch unit capable of withstanding high pressures without losing its low pressure sensitivity or calibration includes a magnetically actuated switch responsive to the magnetic field of a permanent magnet mounted on a hermetically sealed bellows which contains on its interior a substantially incompressible liquid. The amount of liquid hermetically sealed within the bellows is selected to be sufficient to prevent any portion of the bellows from exceeding its elastic limit when the bellows is compressed by exposure to excessively high pressures.
REFERENCES:
patent: 2355894 (1944-08-01), Ray
patent: 2411577 (1946-11-01), Leslie
patent: 3809835 (1974-05-01), Watt
patent: 3852546 (1974-12-01), Maxwell, Jr.
patent: 3946175 (1976-03-01), Sitabkhan
patent: 3982217 (1976-09-01), Reynolds
Llewellyn Thomas E.
Rockenfeller John D.
Textron Inc.
Tolin Gerald P.
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