Electricity: circuit makers and breakers – Fluid pressure – Diaphragm
Patent
1985-06-05
1987-02-17
Tolin, G. P.
Electricity: circuit makers and breakers
Fluid pressure
Diaphragm
200 83J, 73723, H01H 3534
Patent
active
046441166
ABSTRACT:
A pressure switch wherein the interior of a casing is divided by a partition into a fluid chamber fed with a fluid the pressure of which is to be detected, and a working chamber in which a switch mechanism is housed. A rod extends slidably through the partition, provided at its one end with a pressure-receiving portion which is adapted to receive a fluid pressure in the fluid chamber, and projecting at the other end portion thereof into the working chamber so as to change the switching mode of the switch mechanism in accordance with displacement, which occurs due to a fluid pressure applied to the pressure-receiving portion, of the rod to the end thereof which is on the side of the switch mechanism. Springs urge the rod towards the fluid chamber. The fluid chamber is further provided therein with a first spring member the force of which constitutes a part of the desired force of the rod-urging spring. The working chamber is further provided therein with a second spring member the force of which constitutes the remaining part of the desired force of the rod-urging springs. The force of either of the first and second spring members are regulatable. The fluid chamber is further provided therein with a flexible pressure-receiving seal member which is fitted around the pressure-receiving portion of the rod, and which is engaged resiliently at its circumferential portion with the inner surface of the fluid chamber so as to function as a seal.
REFERENCES:
patent: 3676620 (1972-07-01), Modes
patent: 4081636 (1978-03-01), Rice
patent: 4107492 (1978-08-01), Moon, Jr.
patent: 4194103 (1980-03-01), Smith
patent: 4220836 (1980-09-01), Hersey
patent: 4456801 (1984-06-01), Lauritsen
Honda Giken Kogyo Kabushiki Kaisha
Tolin G. P.
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