Tantalum carbide filament lamp and process for the production thereof
AssigneeKoninklijke Philips Electronics N.V.
InventorsMathias Hubertus Johannes Van Rijswick, Adriaantje Pieternella Mouws-Van Rossum
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Abstract
The invention provides a filament lamp (1) having a filament (20), wherein the filament comprises tantalum carbide. The filament lamp comprises a lamp base part filament construction (15) which comprises a lamp base part (10) with a base part (11) top and a coil (21) comprising tantalum carbide connected to lead-in connections (23), the lead-in connections extending through the base part. The filament lamp further comprises a lamp bulb (40) connected to the base part top (11), thereby providing a filament enclosure (44), which filament enclosure comprises a gas filling (45). The invention further provides a process for making such a lamp.
Claims15
A process for the production of a filament lamp (1) having a filament (20), wherein the filament (20) comprises tantalum carbide, the process comprising:
- a. providing a lamp base part filament construction (15) comprising a lamp base part (10) with a base part top (11), a coil (21) connected to lead-in connections (23), the lead-in connections (23) extending through the base part (10), and the coil (21) comprising tantalum;
- b. converting at least part of the tantalum of the coil (21) into tantalum carbide;
- c. providing a lamp bulb (40) with a bulb opening (43) and bulb opening edge (42) and connecting the bulb opening edge (42) to the base part (11), thereby providing a filament enclosure (44);
- and
- d. introducing a gas filling (45) into the filament enclosure (44).
A filament lamp (1) having a filament comprising tantalum carbide, the filament lamp (1) comprising
- a lamp base part filament construction (15) comprising a lamp base part (10) with a base part top (11),
- a coil (21) comprising tantalum carbide connected to lead-in connections (23), which lead-in connections (23) extend through the base part (10),
- a lamp bulb (40) connected to the base part (11), thereby providing a filament enclosure (44), which filament enclosure (44) comprises a gas filling (45),
- a seal arranged to interconnect the bulb and the lamp base part.
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Dependencies are inferred from the claim text.