THERMAL SWITCH Russian patent published in 1995 - IPC

FIELD: temperature-sensitive devices. SUBSTANCE: thermal element of switch is made of foil band incorporating transformation induced plasticity that has curvilinear form with its ends rigidly fixed which raises force applied by it to movable contact as soon as temperature rises to operating value at greater working movement of element. This, in its turn, makes it possible to reduce geometric dimensions of sensing element. EFFECT: improved speed, sensitivity, reliability, and economic efficiency of switch. 2 dwg