TEMPERATURE SWITCH Russian patent published in 2010 - IPC H01H37/54 

FIELD: electrical engineering.

SUBSTANCE: proposed switch comprises tight bulb 2 with metal case 3 and base 4 at least one conducting male contact (10A, 10B) tightly fitted in through hole (4A, 4B), fixed contact 8 fixed on said male contact (10A, 10B) in bulb 2, heat-sensitive plate 6 with one end connected to and secured on inner surface of bulb 2 and with direction of curvature reversing at preset temperature, and at least one movable contact 7 attached to the other end of heat-sensitive plate 6. Both fixed contact 8 and movable contact 7 comprises silver-cadmium oxide-system contact, while bulb 2 is filled with gas containing 50-95% of helium causing bulb inside pressure of 0.38-0.68 atm at a room temperature.

EFFECT: reduced sizes, longer life and better current breaking conditions.

12 cl, 9 dwg