| 摘要 |
<p>399,502. Nonconducting coverings for heat. MUNTERS, C. G., 75, Linnegatan, Stockholm. Feb. 29, 1932, No. 13851/33. Convention date, March 3, 1931. Divided on 402,726. [Class 64 (ii).] Heat-insulating material comprises a hermetically sealed element divided into layers or cells, and containing gas having a lower heat conductivity than air, and composed of molecules, at least one of the atoms of which is heavier than oxygen ; gaseous compounds of halogens or sulphur such as sulphur dioxide or hexafluoride and carbon bisulphide may be used. The element may be in the form of a plate with outer walls f of metal enclosing a cellular or powdered material g, such as silicious earth, glass wool, or powdered hard rubber, and gas at atmospheric pressure or less. The edges h of the plates may be corrugated to interengage, and are formed of a nonconductor such as celluloid or ebonite. In a modification, the element consists of parallel plates of aluminium foil and outer walls of thicker sheets ; the spaces between the foils inter-communicate by holes. Gas is blown through openings in the edges which are then sealed. In another form, the element comprises a large number of gastight cells formed in a nonconducting material such as celluloid. Specification 399,503 is referred to.</p> |
