Sensata Technologies, Inc.

Sensata Technologies Massachusetts, Inc.

Michelle Pisuk

Keith Crowe

Karl A Kohm

Brian Leary

Savithri Subramanyam

Sameer Masurkar

Derek H Turner

Keith E Crowe

A motor protector () is shown having an elongated generally cup-shaped metallic housing () formed by a top wall () and a side wall () extending down from the perimeter of the top walls, the free end of which is welded to a header (). The side and top wall have a rounded junction () and a calibration rill () is formed in the top wall from one end of the housing and through the rounded junction. An elongated thermostatic disc () is mounted in the housing and has a movable electrical contact () mounted at one end to be movable into and out of engagement with a stationary electrical contact () that is in turn mounted on a heater (). A ceramic insulator plate () is interposed between the heater and the header.

Thermally responsive electrical switch

A protector () particularly useful for wye-connected three phase electrical motors has a header () mounting first and second terminal pins () to which L-shaped pin heaters () are mounted along with stationary electrical contacts (). A generally U-shaped heater and support member () has two leg ends welded to the header intermediate to the terminal pins and a snap acting thermostatic disc () is welded through a weld slug to the central portion of the heater and support member. First and second movable electrical contacts () are mounted on the bottom surface of the thermostatic disc positioned to move into and out of engagement with respective stationary contacts upon snapping of the thermostatic disc from one dished configuration to an opposite dished configuration in dependence on temperature of the disc. A cover () is hermetically attached to the header and is provided with a force application location aligned with the weld slug which can be depressed against the weld slug and thereby adjust the operating temperature of the thermostatic disc.

Protector for electrical apparatus

Growing community of inventors

Waltham, MA, United States of America

Michelle Pisuk