US2145157A - Incandescent electric lamp - Google Patents
Incandescent electric lamp Download PDFInfo
- Publication number
- US2145157A US2145157A US214824A US21482438A US2145157A US 2145157 A US2145157 A US 2145157A US 214824 A US214824 A US 214824A US 21482438 A US21482438 A US 21482438A US 2145157 A US2145157 A US 2145157A
- Authority
- US
- United States
- Prior art keywords
- envelope
- filament
- lamp
- leading
- wires
- 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 - Lifetime
Links
- 239000011521 glass Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 239000010453 quartz Substances 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 239000011888 foil Substances 0.000 description 3
- 229910052750 molybdenum Inorganic materials 0.000 description 3
- 239000011733 molybdenum Substances 0.000 description 3
- 238000001953 recrystallisation Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003870 refractory metal Substances 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01K—ELECTRIC INCANDESCENT LAMPS
- H01K3/00—Apparatus or processes adapted to the manufacture, installing, removal, or maintenance of incandescent lamps or parts thereof
Definitions
- the present invention relates to incandescent electric lamps and more particularly to such 'lamps in which a relatively short coiled filament of a refractory metal such as tungsten is mounted within and sealed into an envelope consisting of a tube of quartz or other like strong, heat resisting transparent or translucent vitreous material so as to lie axially within the tube.
- a relatively short coiled filament of a refractory metal such as tungsten
- One object of my invention is to provide a method of mounting the filament of an electric incandescent lamp so that it may be easily drawn taut without weakening the lamp envelope.
- the sealing of the leading-in wiresinto the drawn-down ends or neck portions of the tubular envelope is eflected at points somewhat spaced from the body of the envelope, and after the envelope has been sealedoil the portion of one or both of the drawn-down ends of the envelope, adjacent the body thereof,
- a typical double-ended lamp comprising a filament I mounted within a small tubular envelope 2 preferably of quartz or other high heat-resistant glass.
- the filament I is disposed substantially axially of the tubular envelope 2 which is of relatively small internal diameter.
- Opposite ends of the filament are connected to current supply or leading-in wires sealed into reduced end or neck portions 2' of the lamp envelope 2, each of said wires comprising a length of molybdenum wire 3 secured to the filament l, a strip of molybdenum foil attached to the wire 3, and a section of molybdenum strip 5 secured to the foil 4.
- the filament assembly is sealed into the quartz or glass envelope 2 in the usual way, using the above-described molybdenum strip seal.
- the seals are at a relatively short distance, such as 1 or 2 mm.', from the body of the lamp envelope 2. According to my invention, however, the seal is made at a considerably greater distance from 10 the body of the lamp envelope, preferably at a distance of about to 1 cm. therefrom, as shown in the drawing.
- the lamp envelope is then exhausted through the exhaust tube Ii after which the filament is then burned or flash aged in the .customary manner until recrystallization processes, etc., are complete.
- the envelope neck portion A immediately adjacent the body of the envelope 2 is then softened and the filament I drawn taut by a pulling-out or stretching operation.
- One or both of the envelope neck portions A between the body of the envelope and the current supply wire seal may be softened to permit this drawing-out Q or stretching of the filament.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
- Resistance Heating (AREA)
- Threshing Machine Elements (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB19403/37A GB498827A (en) | 1937-07-13 | 1937-07-13 | Improvements relating to electric incandescent lamps |
Publications (1)
Publication Number | Publication Date |
---|---|
US2145157A true US2145157A (en) | 1939-01-24 |
Family
ID=10128767
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US214824A Expired - Lifetime US2145157A (en) | 1937-07-13 | 1938-06-20 | Incandescent electric lamp |
Country Status (4)
Country | Link |
---|---|
US (1) | US2145157A (fr) |
BE (1) | BE429127A (fr) |
DE (1) | DE681139C (fr) |
GB (1) | GB498827A (fr) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3408719A (en) * | 1965-11-08 | 1968-11-05 | Gen Electric | Method of assembling lamp filament and support structure |
US3685880A (en) * | 1970-07-06 | 1972-08-22 | Gen Electric | Manufacture of lamps of the compact arc discharge type |
US3900237A (en) * | 1973-08-09 | 1975-08-19 | Gte Sylvania Inc | Method of making arch shaped arc tube |
-
0
- BE BE429127D patent/BE429127A/xx unknown
-
1937
- 1937-07-13 GB GB19403/37A patent/GB498827A/en not_active Expired
-
1938
- 1938-06-20 US US214824A patent/US2145157A/en not_active Expired - Lifetime
- 1938-07-13 DE DEP77606D patent/DE681139C/de not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3408719A (en) * | 1965-11-08 | 1968-11-05 | Gen Electric | Method of assembling lamp filament and support structure |
US3685880A (en) * | 1970-07-06 | 1972-08-22 | Gen Electric | Manufacture of lamps of the compact arc discharge type |
US3900237A (en) * | 1973-08-09 | 1975-08-19 | Gte Sylvania Inc | Method of making arch shaped arc tube |
Also Published As
Publication number | Publication date |
---|---|
GB498827A (en) | 1939-01-13 |
BE429127A (fr) | |
DE681139C (de) | 1939-09-15 |
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