Thermal fuse employing a thermosensitive pellet
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United States of America Patent
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Feb 12, 2008
Grant Date -
Sep 21, 2006
app pub date -
Aug 12, 2005
filing date -
Mar 17, 2005
priority date (Note) -
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Abstract
There is provided a thermal fuse employing a thermosensitive pellet that reacts to an operating temperature with limited variation, and operates with high precision and hence high reliability. To achieve this, the thermal fuse includes a switching function member including a thermosensitive pellet, a movable conductor, and a spring member. At a prescribed operating temperature the thermosensitive pellet softens or melts to liberate the spring member from a load to cause the spring member to move the movable conductor to switch an electrical circuit located between first and second lead members. The thermosensitive pellet is formed of a thermosensitive material selected depending on a characteristic in flowability presented as it softens or melts.
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