The Torrington Company

Scott M Duncan

Alfred J Santos

James A Hilby

John M Grillo

Mark A Polinsky

John B Moseley

Frederick A Cook, Jr

A fluid seal is joined to a seal carrier, and a magneto-responsive sensor is coupled to a carrier to sense the polarities of a magnet borne on a rotatable shaft. The seal carrier, with the incorporated sensor, is arranged about the shaft, and leads from the sensor transmit an output signal voltage which corresponds to, or is proportional to the speed of rotation of the shaft. Depending upon the type of sensor employed, the signal voltage will be of repeatedly changing amplitude (i.e., pulsed or sine wave), or of given amplitude, in which the signal goes from zero to the given amplitude, to zero cyclically, or the sine wave amplitude/voltage increases with increasing speed, or pulse widths which diminish with speed acceleration.

Speed sensor assembly having a fluid seal carrier and piloting cup

A magnetic field source is mounted on one race of a two-race radial or thrust bearing. The race with the magnetic field source rotates. The other race does not rotate. A magnetic field sensor is mounted on a flexible arm of a rigid arm support. The arm support with its flexible arm does not rotate but the flexible arm may flex in response to movement of either of the races or the flexible arm support member so that the magnetic field sensor is always kept a constant predetermined distance from the magnetic field source. The number of times alternate magnetic poles on the rotating race is sensed by the sensor per unit of time indicates the speed of the rotating race.

Magnetic field sensor mounting with sensor arm contacting rotating

A permanently magnetized magnet associated with the bearing provides a magnetic field which is detected by a detector in the bearing. The relative rotation of one part of the bearing, such as a rotatable shaft or rotatable race, with respect to a second part of the bearing, such as a race, is indicated by the detector.

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Avon, CT, United States of America

Scott M Duncan