Combined thermal and electrical cut-off device

Details Combined thermal and electrical cut-off device Combined thermal and electrical cut-off device

H - Electricity

01

H

306/130

H01H 37/76 (2006.01) H01H 71/20 (2006.01)

Patent

CA 1116213

Case 3405 COMBINED THERMAL AND ELECTRICAL CUT-OFF DEVICE Abstract of the Disclosure The device described herein is useful in applications which formerly required both a thermal cut-off device and an electrical fuse. This device will open an electrical circuit in response to either an increase in ambient temperature or an increase in electrical current. A bracket is provided to support a radial lead thermal cut-off device. The bracket is of a general C-shaped configuration and has an extending lead bar that is crimped into electrical engagement with an input lead, and one radial lead of the thermal cut-off device is crimped into electrical engagement with the second input lead. A helical conductive coil has one end welded or otherwise secured to the C-shaped bracket, and the second lead of the thermal cut-off device is crimped to the other end of the helical coil which is positioned over the thermal cut-off device so as to surround it. Thus, an ambient temperature rise may cause the thermal cut-off device to open the electrical circuit; or alternately the heat generated by the I2R loss in the coil due to excessive electrical current flow may cause the device to also open.

350556

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