Combined electronic pressure transducer and power switch

Details Combined electronic pressure transducer and power switch Combined electronic pressure transducer and power switch

G - Physics

01

L

340/145, 306/206

G01L 9/10 (2006.01) G01L 9/14 (2006.01) H01H 35/24 (2006.01)

Patent

CA 1238501

COMBINED ELECTRONIC PRESSURE TRANSDUCER AND POWER SWITCH ABSTRACT A pressure switch and transducer arrangement com- bines into a single unit both a power contact switch for providing power to an automobile fuel pump in re- sponse to a predetermined minimum oil pressure and a magnet/Hall effect sensor for providing an analog signal indicative of the oil pressure for use by the automobile on-board microcomputer. The arrangement includes an ac- tuator rod movable by a diaphragm in response to oil pressure. The end of the rod remote from the diaphragm is coupled to a contact washer for providing the power switching function and also to a magnet which cooperates with a fixed Hall effect sensor, which sensor provides an output corresponding to the air gap between the mag- net and the sensor. The magnet and the washer are coupled to the actuator rod in such a manner that even after the washer makes contact with the power switching terminals, the actuator rod and magnet are free to con- tinue moving as the oil pressure continues to increase.

491683

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