Thermal protector
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United States of America Patent
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Jun 2, 2015
Grant Date -
Feb 20, 2014
app pub date -
Aug 16, 2012
filing date -
Aug 16, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
A thermal protector for opening and closing an electric circuit, includes: a movable plate having a movable contact point mounted on a one end portion thereof and having a terminal mounted on an opposite end portion thereof; a bypass member joined to the movable plate at the end portions of the movable plate on which the movable contact point and the terminal are mounted; and a thermal responsive element for moving the movable contact point of the movable plate by a snap action thereof to open and close the electric circuit, wherein the bypass member is formed of a first metal material having a higher conductivity than a second metal material of which the movable plate is formed, and the movable plate and the bypass member are joined together and are subjected to heat treatment so that the first metal material of the bypass member is softened while the second metal material of the movable plate is precipitation-hardened.
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