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US 6,191,526 B1Granted
Electric lamp having a current lead-in wire with a flattened U-shaped end segment
AssigneePatent-Treuhand-Gesellschaft fuer elektrische Gluehlampen mbH
InventorsRolf Minder, Rolf Kiesel
Life of this patent
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Abstract
The invention relates to the fastening of incandescent coil filaments to current lead-in wires in electric lamps. One end (41) of the current lead-in wires is flattened and U-shaped. The U-shaped segment (41) of the current lead-in wire forms a gap-like seat (45) for a coiled incandescent coil-filament end (3a), the gap width of which is smaller than the outside diameter of the incandescent coil-filament end (3a).
Claims16
An electric lamp comprising:
- a lamp bulb;
- at least one incandescent coil filament disposed in the lamp bulb;
- and
- electric current leads connected to the incandescent coil filament;
- wherein at least one of the current leads is a current lead-in wire;
- wherein one end portion of the current lead-in wire is flattened and is U-shaped so as to define a U-shaped end segment having a flattened free leg and a flattened further leg extending from a non-flattened portion of the current lead-in wire;
- wherein the at least one incandescent coil filament has a coiled end which is arranged transverse to the flattened legs and which is disposed in a seat defined by a gap between the flattened legs;
- wherein the gap has a width which is determined by a degree of flattening of the legs and which is smaller than an outside diameter of the coiled end of the at least one incandescent coil filament.
5 more elements
Dependencies are inferred from the claim text.