Halogen incandescent lamp

#The invention relates to a halogen incandescent lamp in accordance with the preamble of patent claim 1.

#Such a side reflector lamp is described under the product designation “MINISTAR®” at the Internet domain www.osram.de. With this halogen incandescent lamp, a circumferential section of a lamp vessel is provided with a reflective coating such that a laterally arranged light-exit window remains on the lamp vessel, and this light-exit window makes it possible to use this lamp, for example, as a downlight, the lamp being mounted in the horizontal direction. Such reflector lamps have an extremely compact design and therefore require a minimum amount of installation space when they are installed.

#This known design is significantly simpler than conventional reflector lamps, as are described, for example, in the European patent specification EP 0 495 194 B1. Such reflector lamps comprise a reflector, which is formed by a parabolic or ellipsoidal glass cap, and a halogen incandescent lamp which is fixed in the optical axis of the reflector.

#The invention will be explained in more detail below with reference to a preferred exemplary embodiment. In the drawings:

#FIG. 1 shows a front view of a halogen incandescent lamp according to the invention;

#FIG. 2 shows a side view of the halogen incandescent lamp shown in FIG. 1, and

#FIGS. 1 to 3 show a halogen incandescent lamp 1 which is designed for operation using the system voltage. In principle, however, the invention can also be used for low-voltage or medium-voltage halogen incandescent lamps.

#The halogen incandescent lamp 1 has, as shown in FIGS. 1 and 2, a lamp vessel 2, which is preferably made of quartz glass and on whose lower end section in FIG. 1 is formed a base 4 by means of a pinch seal, it being possible for said base 4 to be inserted in a lampholder (not shown). This base 4 merges with a bulb 8 of the lamp vessel 2 via a circumferential bevel 6. The end section, which is remote from the base 4, of the lamp vessel 2 is formed by a dome 10 on which is formed an exhaust tube attachment 12.

#Arranged in the lamp vessel 2 is a luminous element 14 which is designed, in the exemplary embodiment described, to have two filament branches 16, 18 which are connected to one another via a connecting part 20. As can be seen in FIG. 1, the filament branches 16, 18 are positioned at an angle with respect to one another such that the spacing between them is greater at the bottom, towards the base 4. The two filament branches 16, 18 merge with power supply lines 22, 24, whose end sections enter the base 4 formed by the pinch seal and are each connected to a molybdenum film 26, 28 which are likewise embedded in the base 4. In turn, these molybdenum films are connected to approximately U-shaped, outer power supply lines, referred to below as contacts 30, 32, whose bent-back end sections enter channels in the base 4 or are embedded in said channels. The filament branches 16, 18, the connecting part 20 and the two power supply lines 22, 24 are preferably produced from tungsten.