Tightenable electrical sleeve heater

H - Electricity – 05 – B

Patent

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Details

H05B 3/00 (2006.01) B29C 45/17 (2006.01) B29C 45/20 (2006.01) H05B 3/58 (2006.01)

Patent

CA 2242946

An electrical heater for heating an object having a generally cylindrical outer surface has a helicoidal coil having a plurality of turns centered on an axis and inner and outer ends and adapted to fit around the object in contact with the outer surface thereof. A source of electricity is connected to the inner end for supplying electricity thereto and thereby heating the coil. An anchor fixed on one of the turns adjacent the outer end is connected to an element extending to the anchor for drawing the outer end and anchor together and thereby reducing an inside diameter of at least an outer turn of the coil and tightening the outer turn around the object around which the coil is fitted.

Un appareil de chauffage électrique chauffant un objet dont la surface extérieure est généralement cylindrique comprend une bobine hélicoïdale composée de plusieurs spires centrées sur un axe et comprenant des extrémités interne et externe; la bobine s'adapte autour de l'objet dont elle touche la surface extérieure. Une source d'électricité est reliée à l'extrémité interne pour faire passer le courant et, par conséquent, chauffer la bobine. Une attache fixée à l'une des spires adjacente à l'extrémité externe est raccordée à un élément qui se prolonge jusqu'à l'attache pour tirer cette dernière et l'extrémité externe, diminuant ainsi le diamètre intérieur d'au moins une spire extérieure de la bobine et serrant cette dernière sur l'objet autour duquel la bobine est montée.

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