A thermal cut-off device comprises a casing and a cover therefor both made of a highly heat conductive electrically insulating material such as ceramic. A pair of lead wires protrude from opposite ends of the casings with the other ends of the wires being electrically connected to an electrical assembly...http://www.google.com.au/patents/US4527144?utm_source=gb-gplus-sharePatent US4527144 - Thermal cut-off device
