Electric lamp having retaining pinches for the luminous element
View Patent ↗The invention proposes a lamp ( 1 ), in particular a halogen incandescent lamp for system voltage, having a luminous element ( 8 ), which is retained by pinches ( 10 a, 10 b ) which are in the form of funnel-shaped turned-in sections in the end face ( 3 ) of the lamp vessel ( 2 ), the pinches ( 10 a, 10 b ) being oriented essentially axially with respect to the longitudinal axis of the lamp ( 1 ).
1. An electric lamp having
a lamp vessel, having a wall defining an enclosed volume, and a first power supply line and a second power supply extended through the wall in a sealed fashion;
a lamp base, which adjoins one end of the lamp vessel and, as a result, defines a lamp axis,
a luminous element having a plurality of segments serially coupled electrically between the first power supply line and the second power supply line, the luminous element being, located within the lamp vessel and arranged essentially in an plane which is oriented perpendicularly with respect to the lamp axis, the segments being arranged in said plane around said lamp axis;
pinches, which are formed by turned-in sections of the lamp vessel and extend essentially parallel to the lamp axis, the pinches at least partially retaining the luminous element.
2. The electric lamp as claimed in claim 1 , the turned-in sections forming the pinches being in the form of funnels.
3. The electric lamp as claimed in claim 1 , the pinches being completely separated from one another or partially overlapping one another.
4. The electric lamp as claimed in claim 1 , the luminous element being formed by an incandescent filament.
5. The electric lamp as claimed in claim 4 , sections of the incandescent filament being embedded in each case in a pinch tip in the region of the pinches.
6. The electric lamp as claimed in claim 4 , the incandescent filament having in each case one secondary winding in the region of the pinches, with which secondary windings the incandescent filament is retained fixedly at the pinch tips.
7. The electric lamp as claimed in claim 4 , the incandescent filament being passed, under stress, to the outside around the pinches, as a result of which the incandescent filament is, as it were, stretched via the pinches.
8. The electric lamp as claimed in claim 4 , the incandescent filament having filament segments with the number N, and the number of pinches being N+1.
9. The electric lamp as claimed in claim 8 , in each case one pinch being provided between each pair of two adjacent filament segments and in each case one pinch being provided at a connection between the incandescent filament and the first power supply line, and at a connection between the incandescent filament and the second power supply line.
10. The electric lamp as claimed in claim 4 , the incandescent filament having filament segments with the number N and being stretched in the form of an N+1-sided polygon, which is open on the side of the two power supply lines of the incandescent filament.
11. The electric lamp as claimed in claim 4 having four pinches, the incandescent filament being retained at its two power supply lines by in each case one pinch, and the remaining incandescent filament being retained by two further pinches, as a result of which in total three filament segments are defined between the pinches.
12. The electric lamp as claimed in claim 1 , the lamp vessel having an essentially flat or at least only slightly concavely or convexly curved section which is opposite the base and having a conical section which tapers in the direction of the base.
13. The electric lamp as claimed in claim 12 , the conical section being provided with a reflective coating.
14. The electric lamp as claimed in claim 1 , the lamp base being formed from the material of the lamp vessel.
15. The electric lamp as claimed in claim 1 , which is in the form of a halogen incandescent lamp for direct operation using the system voltage.
16. The electric lamp as claimed in claim 2 , the pinches being completely separated from one another or partially overlapping one another.