Thermally responsive fluid and electrical switch and control sys

Details Thermally responsive fluid and electrical switch and control sys Thermally responsive fluid and electrical switch and control sys

1979-12-03

1983-07-12

Harris, George

Automatic temperature and humidity regulation

Snap-acting

Including a permanent magnet

236 87, 337365, 337380, G05D 2310

Patent

active

043926088

ABSTRACT:
A thermally responsive fluid and electrical switch particularly for use in an automotive engine control system has first and second housing means each with an open-ended well, the housing means being secured together so that the wells cooperate to form a switch chamber. Fluid ports and terminal apertures open into the second housing means, and terminals are mounted in the terminal apertures to extend into the chamber. Valve and contact means are disposed in the chamber. A thermally responsive snap acting disc is mounted in the chamber in heat-transfer relation to the thermally conducting first housing to move in response to selected temperature changes and motion transfer means move in the chamber with the disc for moving the valve means to regulate fluid flow between the ports and for moving the contact means to regulate the flow of electrical current between the terminals. Means in the chamber slidably engage the motion transfer means to sealingly separate the switch chamber into first and second portions respectively enclosing the valve and contact means. The switch is used in an automotive engine control system to be responsive to changes in engine temperature for actuating vacuum means and electrical means to regulate operating parameters of the engine in accordance with corresponding changes in engine temperature.

REFERENCES:
patent: 3500277 (1970-03-01), Nardulli
patent: 3768057 (1973-10-01), Sekira et al.
patent: 3893057 (1975-07-01), Beunk er al.
patent: 4026464 (1977-05-01), Doherty
patent: 4117976 (1978-10-01), Doherty
patent: 4142676 (1979-03-01), Hattori
patent: 4144998 (1979-03-01), Wakabayashi et al.

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