Thermal cut-off fuse

Details Thermal cut-off fuse Thermal cut-off fuse

H - Electricity

01

H

306/130

H01H 37/76 (2006.01) H01H 37/36 (2006.01)

Patent

CA 1124285

ABSTRACT OF THE DISCLOSURE Disclosed is a thermal cut-off fuse for breaking electric continuity between first and second lead wires at a prescribed temperature. The fuse includes a housing with an electrically conductive contact means adapted to move between first and second positions in a hollow space of the housing and while at the first position to remain in contact with first and second terminal portions electrically connected within the housing respectively with the first and second lead wires and, while at the second position, to be separated from at least one of the two terminal portions. A temperature-sensitive member is sealed in a space within the housing on the side of the first position of the contact means, with a surface of the temperature- sensitive member opposed to the contact means. The member is adapted to remain solid under normal conditions and at the prescribed temperature being adapted to melt and undergo voluminal expansion, whereby the melting and voluminal expansion of the temperature-sensitive member at the prescribed temperature causes the surface of the member opposed to the contact means to be moved toward the contact means until the contact means is brought to the second position and the electric continuity between the first and the second lead wires is broken.

345931

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