Method of making a halogen incandescent lamp

Details Method of making a halogen incandescent lamp Method of making a halogen incandescent lamp

H - Electricity

01

K

H01K 3/00 (2006.01) H01J 9/24 (2006.01) H01K 1/28 (2006.01) H01K 1/32 (2006.01)

Patent

CA 2207582

To provide a halogen incandescent bulb with controlled variation in wall thickness of the bulb, a bulb tube (20) first has a cup region (26) formed thereon. The cup region, by radial application of force, for example by rollers (22), is constricted, and the constriction then pulled to form a small, closed projecting tip (19). Mold jaws (27) then mold the shape of the bulb; the mold jaws are formed with a cavity (29') to receive the projecting tip (19) which, then, has the end cut off to provide an attachment cannula (30) for the pumping tube (32). The pumping tube is melted on the nipple (29) of the cup (26) of the bulb. A filament mount (8) with filaments (9) is then introduced, and pinch jaws (35) pinch-seal the filament mount in the bulb and finish-shape the bulb. The bulb can then be flushed, evacuated, and filled with the requisite halogen containing fill through the pumping tube (32), which then is tipped off.

Pour contrôler les variations d'épaisseur dans la paroi d'une ampoule incandescente aux halogènes, une portion cuvette (26) est d'abord formée sur le tube 20). Une force radiale est ensuite appliquée au moyen de galets presseurs (22), par exemple, pour former une constriction qui est ensuite soumise à la traction en vue d'obtenir une petite pointe en saillie (19). Des mâchoires de moulage (27) sont ensuite utilisées pour donner sa forme à l'ampoule; les mâchoires de moulage comportent une cavité (29') destinée à recevoir la pointe en saillie (19) dont l'extrémité doit être coupée pour former la canule de fixation (30) du tube d'aspiration (32). Le tube d'aspiration est fusionné au mamelon de la portion cuvette (26) de l'ampoule. Un queusot (8) avec filaments (9) est ensuite introduit à l'intérieur de l'ampoule; des mâchoires de pincement (35) assurent le scellage du queusot et la finition de l'ampoule. L'ampoule est ensuite vidée, purgée et remplie de l'atmosphère appropriée contenant de l'halogène au moyen du tube d'aspiration (32) qui est ensuite arasé.

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