GB317678A - Improvements in and relating to thermal insulation - Google Patents

Abstract

317,678. Schmidt, E., and Dyckerhoff, E. Nov. 3, 1928. Nonconducting coverings for heat. -Objects are thermally insulated by means of thin metallic or other flexible sheet material which is supported by a spacing structure to enclose layers of air, and finally enclosed by a casing. A casing b, Fig. 1, is spaced from a tube a by means of members c having only a few points of contact with the tube a, and having slots f, Fig. 4, through which a wire or band g is drawn and secured by means of a tension device o. Flat bands i are inserted in slots h in the members c, and serve to support thin aluminium sheets s which enclose the air layers forming the insulation. Modifications are described in which the bands g are dispensed with, and the bands i retain the members c. In this case, each member c is formed in sections which engage over one another in the manner of press studs with the bands i and sheets s between, The bands are deformed where they pass through the member c. to secure them. The spacing members may be formed from a metal strip d, Fig. 15, having tongues c pressed out, and such members may be applied to objects of any shape. Several other forms of spacing members are described, and all may be made of sheet iron containing 0.5 per cent of silicon, or of nickel steel containing 15-30 per cent of nickel. A suitable sectional casing for curved pipes is made from separate strips k. l, Fig. 20, which are bent into shape with their edges overlapping. A number of projecting studs m, p, are provided on the edges, to receive connecting wires n, Fig. 22.