Sheathed heater

H - Electricity – 05 – B

Patent

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Details

H05B 3/02 (2006.01) H05B 3/46 (2006.01) H05B 3/48 (2006.01)

Patent

CA 2114340

A sheathed heater comprising at least two core pieces of porcelain insulator separated to each other in the axial direction of said core piece, at least two lead pins separated to each other and inserted into the core pieces axially, at least two internal heater coil segments wound around the at leaat two core pieces, respectively, and a cylindrical metal sheath into which the core pieces and the internal heater coil segments are inserted through a thermal and electrical insulation material, wherein adjacent ends of adjacent internal heater coil segments are electrically connected to the same lead pin, or lead pins of the same electric potential.

Cette invention concerne un élément chauffant sous gaine comprenant au moins deux isolateurs en porcelaine juxtaposés et non jointifs dans le sens de la longueur, au moins deux broches d'alimentation espacées l'une de l'autre et insérées dans les isolateurs dans le sens de la longueur, au moins deux enroulements chauffants internes bobinés autour des isolateurs précités et une gaine métallique cylindrique dans laquelle sont logés lesdits enroulements. Ces enroulements et les isolateurs sur lesquels ils sont bobinés sont insérés dans la gaine à travers un matériau électro et thermo-isolant, les extrémités adjacentes desdits enroulements étant raccordées à la même broche d'alimentation ou à des broches d'alimentation de même tension.

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