GB944827A - Incandescent lamp - Google Patents
Incandescent lampInfo
- Publication number
- GB944827A GB944827A GB36867/61A GB3686761A GB944827A GB 944827 A GB944827 A GB 944827A GB 36867/61 A GB36867/61 A GB 36867/61A GB 3686761 A GB3686761 A GB 3686761A GB 944827 A GB944827 A GB 944827A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tantalum
- xylol
- envelope
- atmosphere
- coil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract 3
- 239000001257 hydrogen Substances 0.000 abstract 3
- 229910052739 hydrogen Inorganic materials 0.000 abstract 3
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 abstract 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract 2
- 238000000034 method Methods 0.000 abstract 2
- 229920006395 saturated elastomer Polymers 0.000 abstract 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract 1
- 239000004215 Carbon black (E152) Substances 0.000 abstract 1
- 229910001362 Ta alloys Inorganic materials 0.000 abstract 1
- 238000005255 carburizing Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 abstract 1
- 229910002804 graphite Inorganic materials 0.000 abstract 1
- 239000010439 graphite Substances 0.000 abstract 1
- 229930195733 hydrocarbon Natural products 0.000 abstract 1
- 150000002430 hydrocarbons Chemical class 0.000 abstract 1
- 238000011065 in-situ storage Methods 0.000 abstract 1
- NFFIWVVINABMKP-UHFFFAOYSA-N methylidynetantalum Chemical compound [Ta]#C NFFIWVVINABMKP-UHFFFAOYSA-N 0.000 abstract 1
- 238000007665 sagging Methods 0.000 abstract 1
- 239000000725 suspension Substances 0.000 abstract 1
- 229910003468 tantalcarbide Inorganic materials 0.000 abstract 1
- 229910052715 tantalum Inorganic materials 0.000 abstract 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01K—ELECTRIC INCANDESCENT LAMPS
- H01K1/00—Details
- H01K1/18—Mountings or supports for the incandescent body
Landscapes
- Resistance Heating (AREA)
Abstract
A filament of tantalum or tantalum alloy mounted on supports within the envelope of an elastic incandescent lamp is converted to tantalum carbide in situ by passing current through it to raise it to a temperature of 2000-2600 DEG C. in an atmosphere of hydrogen containing 1/8 -\ba1/4 % of methane or an atmosphere of hydrogen saturated with xylol. The carburizing may be carried out in stages, the coil being heated to 2250 DEG C. for 1 1/2 minutes, the envelope being then exhausted and refilled with hydrogen saturated with xylol, the process being repeated five times. Thereafter, a gas filling with an increased content of hydrocarbon is used, the temperature being raised to 2380 DEG C. for half a minute and then to 2500 DEG C. over 1 1/2 minutes, this process being repeated four times. The upper half of the coil may be coated with a suspension of colloidal graphite in water to prevent sagging of the finished filament.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US62678A US3114069A (en) | 1960-10-14 | 1960-10-14 | Incandescent lamp with vibration damping support for filament |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB944827A true GB944827A (en) | 1963-12-18 |
Family
ID=22044100
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB36867/61A Expired GB944827A (en) | 1960-10-14 | 1961-10-13 | Incandescent lamp |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US3114069A (en) |
| BE (1) | BE608525A (en) |
| GB (1) | GB944827A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3441770A (en) * | 1967-04-10 | 1969-04-29 | Gen Electric | Electric incandescent lamp with shock and vibration resistant filament support structure |
| DE1589294A1 (en) * | 1967-06-19 | 1970-06-04 | Patra Patent Treuhand | Halogen light bulbs, especially for motor vehicle headlights |
| US4131819A (en) * | 1978-02-15 | 1978-12-26 | General Electric Company | Lead wires for incandescent lamp |
| US4812716A (en) * | 1985-04-03 | 1989-03-14 | Matsushita Electric Industrial Co., Ltd. | Electron beam scanning display apparatus with cathode vibration suppression |
| CA2103415A1 (en) * | 1993-01-12 | 1994-07-13 | Laszlo V. Lieszkovszky | Method and apparatus for providing wire support for an electric lamp |
| EP2160753A2 (en) * | 2007-06-20 | 2010-03-10 | Koninklijke Philips Electronics N.V. | Tantalum carbide filament lamp and process for the production thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1620487A (en) * | 1921-12-19 | 1927-03-08 | Westinghouse Lamp Co | Filament support for series lamps |
| US2987643A (en) * | 1956-05-02 | 1961-06-06 | Gen Electric | Filament joint for electric lamps or similar devices |
| NL98966C (en) * | 1958-11-19 |
-
1960
- 1960-10-14 US US62678A patent/US3114069A/en not_active Expired - Lifetime
-
1961
- 1961-09-26 BE BE608525A patent/BE608525A/en unknown
- 1961-10-13 GB GB36867/61A patent/GB944827A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| BE608525A (en) | 1962-01-15 |
| US3114069A (en) | 1963-12-10 |
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