Electric incandescent lamp and filament for incandescent lamps

Details Electric incandescent lamp and filament for incandescent lamps Electric incandescent lamp and filament for incandescent lamps

H - Electricity

01

K

H01K 1/28 (2006.01) H01K 1/14 (2006.01)

Patent

CA 2192087

An electric incandescent lamp (4), in particular an incandescent halogen lamp, has a bulb or envelope (5), which is shaped as an ellipsoid or optionally ellipsoid-like (barrel-shaped body) and provided with an IR layer (8). Located inside the bulb (5) axially is a compact filament (2') of circular-cylindrical outer contour; the focal lines of the ellipsoid-like barrel-shaped body each coincide approximately with the last luminous winding on the two ends of the filament. This improves lamp efficiency. The compact filament is preferably in the form of a helical coil (2'), whose power supply lead (10b) remote from the seal is returned to inside the helical coil (2'), or is shaped like a double helix.

Une lampe incandescente électrique (4), notamment une lampe incandescente halogène, comprend une ampoule (5) constituée d'un corps bombé ellipsoïdal ou similaire pourvu d'une couche refléchissant les IR (8). Un corps luminescent compact (2') avec un contour extérieur circulaire cylindrique est axialement monté dans l'ampoule (5), de sorte que les lignes caustiques du corps bombé ellipsoïdal coïncident approximativement avec les dernières spires luminescentes aux deux extrémités du corps luminescent. Le rendement de la lampe est ainsi amélioré. Le corps luminescent compact est de préférence réalisé comme une spirale (2') dont l'amenée de courant (10b) opposée au joint d'étanchéité passe par l'intérieur de la spirale (2'), ou comme une double hélice.

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