Improvements in the electric heating of structures

Abstract

Abstract 554,700. Electric heating. CONCRETE UTILITIES, Ltd., and MARQUES, C. A. Jan. 16, 1942, No. 644.. Divided out of 13482/41. [Class 39 (iii)] In an electric heating element, resistance wires or coils 12 are embedded or enclosed in a monolithic mass of concrete 16 which is non- porous or rendered non-porous. Concrete may be rendered non-porous by increasing the proportion of cement to sand and stone or by tamping or vibrating the moulded concrete. The concrete slab may be laid on or form part of a floor, wall or skirting of a building or part of an air brick or ventilator. In existing floors or walls, resistance wires may be laid in a groove which is then filled with concrete. If the concrete is porous, the cast slab may be coated with "Bakelite" (Registered Trade Mark) varnish, and the slab 40, Fig. 4, may be placed in a recess in a loadcarrying block 41. Slabs 40 may be provided with plug and socket connections and fitted end to end. The slab may be a door- or windowsill, or may be used for forcing plants, or for placing below a road vehicle engine to keep it warm. The Provisional Specification refers also to the mounting of the wire on insulators or a tube cast in the slab, and to the application of the slabs to other heating purposes.

Inventors

No inventors recorded.

Bibliographic Details