Apparatus for simultaneously giving a warning,closing a gas main and operating extinguishing devices in case of fire.

摘要

481,218. Thermal switches. BERGER, H. Dec. 4, 1936, No. 33289. Convention date, March 21. Drawings to Specification. [Class 38 (v)] [Also in Groups XXI, XIII, and XXIX] A bimetallic strip which is corrugated to increase its effective length and is coated with a catalyst sensitive to carbon-monoxide, is arranged as one contact member of a switch, or has an extension arranged, when the strip bends, to rock a mercury switch.