Pressure transducer device using Hall elements

Claim 1

In a control device having a housing means provided with an actuator chamber separated from a pressure differential chamber by wall means having opening means therethrough receiving an axially movable actuator pin that transmits axial movement of a movable part in said pressure differential chamber to said actuator chamber, an adjustable range spring being disposed in said actuator chamber and being operatively interconnected to said actuator pin to tend to move said actuator pin in one direction relative to said housing means, and spring having opposed ends, the improvement comprising Hall effect transducer means in said actuator chamber, said actuator pin having magnet means for operating said transducer means as said movable part axially moves said actuator pin relative to said housing means, said magnet means being disposed in offset relation to the axis of said actuator pin and moving in unison therewith relative to said transducer means, said magnet means comprising an arm having opposed ends and a magnet carried by one of said opposed ends, the other of said opposed ends of said arm being operatively interconnected to said actuator pin, said actuator pin having opposed ends, said other end of said arm being operatively interconnected to one of said opposed ends of said actuator pin, one of said opposed ends of said spring bearing against said other end of said arm holding said other end of said arm against said one end of said actuator pin whereby said magnet moves in unison with said actuator pin.