Improvements in the connection of electrically conductive elements intended for the passage in the hot state of an electric current

摘要

901,821. Electric-heating resistances. SOC. NATIONALE D'ETUDE ET DE CONSTRUCTION DE MOTEURS D'AVIATION. April 6, 1960 [April 10, 1959], No. 12247/60. Class 39 (3). [Also in Groups XXVII and XXXVI] Metallic connection tips 2, 3, e.g. of steel, are bonded to a heating element in the form of a rod 1 of refractory material, e.g. silicon carbide by a paste, constituted by a mixture of a fatty substance and a solvent with a powder of metal or metalloid having a melting-point appreciably lower than that of the metal of the tips 2, 3, which is applied to the ends 4, 41 of the rod 1 and to the bores 5 of the tips 2, 3, and the assembled rod and tips then heated by passage of current or in an oven or by a blowpipe. The paste may be a mixture of 97% powdered aluminium, 2% dammar gum, and 1 % turpentine oil. Alternative fatty substances are tallow and glycerine, and alternative solvents petrol and white spirit. The element can be mounted in an ignition plug for aero-engines.