Compact high-voltage electric light-bulb
OwnerHelmut Davideit, Sigbert Muellerinventors
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Abstract
The compact high-voltage incandescent lamp according to the invention has as a luminous element a threefold winding in the form of a double helix (4) which is formed, for its part, from a coiled-coil filament (4a-4c). It is possible in this way to implement high-voltage incandescent lamps with compact dimensions and high luminances.
Claims12
A compact high-voltage incandescent lamp, in particular a high-voltage halogen incandescent lamp, having a lamp bulb (1;
- 12) and a luminous element (4) which is made from a triply wound incandescent wire, which is arranged inside the lamp bulb (1;
- 12) and is connected in an electrically conducting fashion to two supply leads (9a, 9b) leading outward, the lamp bulb (1;
- 12) and the supply leads (9a, 9b) defining a longitudinal axis of the lamp, and the luminous element being a double helix (4) which is formed from a coiled-coil filament (4a-4c).
The incandescent lamp as claimed in one of the preceding claims, in which the diameter of the double helix increases in the direction of the supply leads.
The incandescent lamp as claimed in one of the preceding claims, in which the lamp bulb (1;
- 12) is rotationally symmetrical.
The incandescent lamp as claimed in one of the preceding claims, in which the two supply leads (9a, 9b) are guided to the outside in a gastight fashion with reference to the longitudinal axis of the lamp on one side of the lamp bulb (1;
- 12).
The incandescent lamp as claimed in one of the preceding claims, in which the wall surface of the lamp bulb (12) is provided with a layer (13) reflecting IR radiation.
Dependencies are inferred from the claim text.