| 摘要 |
FIELD: electrical engineering. SUBSTANCE: when external switch 22 closes power supply circuit of heating element 9 plates 6 are heated and bent to side opposite to element 9. In this case cross-piece 7 moves downwards together with guiding rod 10 closes with its mobile contacts 13 ( or opens ) immobile contacts 17 which means switching of electric circuits. With break of switch 22 heating element 9 is de-energized and cools. Plates 6 return to initial position moving cross-piece 7 backward and breaking ( or making ) autonomous electric circuits. EFFECT: enhanced pulling efforts of drive element, operational reliability, increased speed of movement of contacts with breaking and making, increased force of contact pressure and power of summary switching current, reduced wear-out of contacts, formation of vibration and shock-proof system. 3 dwg
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