| 摘要 |
<p>399,504. Nonconducting coverings for heat. MUNTERS, C. G., 75, Linnegatan, Stockholm. Feb. 29, 1932, No. 13853/33. Convention date, March 3, 1931. Divided on 402,726. [Class 64 (ii).] Heat insulation comprises an hermetically sealed element which contains a gas having a lower heat conductivity than air at corresponding pressure and means for counteracting heat transfer due to connection and radiation, the outer (cold and hot) surfaces f of the element being of metal and the transverse walls h connecting them being of a poor heat t conducting material such as ebonite or celluloid. The gas or gas mixture comprises compounds of halogen or sulphur such as sulphur hexafluoride, sulphur dioxide, or carbon disulphide, and is at atmospheric or reduced pressure. Convection losses are reduced by packing cellular or pulverulent material g such as glass wool, silicious earth, or powdered hard rubber between the plates f or by providing foils or sheets l preferably of aluminium with holes r, the gas being added at n. The transverse walls h may be corrugated and coated with varnish shellac or asphalt. Specifications 399,502 and 399,503 are referred to.</p> |
