Protector for electrical apparatus
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Sep 19, 2006
Grant Date -
Dec 1, 2005
app pub date -
May 27, 2004
filing date -
May 27, 2004
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A protector (10) particularly useful for wye-connected three phase electrical motors has a header (12) mounting first and second terminal pins (14) to which L-shaped pin heaters (16) are mounted along with stationary electrical contacts (16b). A generally U-shaped heater and support member (18) has two leg ends welded to the header intermediate to the terminal pins and a snap acting thermostatic disc (20a) is welded through a weld slug to the central portion of the heater and support member. First and second movable electrical contacts (20b) 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 (24) 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.
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