GB504874A - Process for the manufacture of electric lamp bases from hard glass or quartz glass and incandescent lamps incorporating bases made by such process - Google Patents
Process for the manufacture of electric lamp bases from hard glass or quartz glass and incandescent lamps incorporating bases made by such processInfo
- Publication number
- GB504874A GB504874A GB18919/38A GB1891938A GB504874A GB 504874 A GB504874 A GB 504874A GB 18919/38 A GB18919/38 A GB 18919/38A GB 1891938 A GB1891938 A GB 1891938A GB 504874 A GB504874 A GB 504874A
- Authority
- GB
- United Kingdom
- Prior art keywords
- glass
- sealing
- capillary
- bases
- 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
Links
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
- H01K3/20—Sealing-in wires directly into the envelope
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
504,874. Sealing leading - in conductors. VEREINIGTE GLUHLAMPEN UND ELEKTRIZITATS AKT.-GES. June 25, 1938, No. 18919. Convention date, June 25, 1937. Drawings to Specification. [Class 36] Lamp bases are manufactured by sealing leading-in conductors, in the form of wires or foils of refractory metal, into a hard glass or quartz glass capillary with two ducts by a glass-fusing operation which, in itself, establishes complete hermeticity. Tungsten wires may be sealed in directly ; or, molybdenum foils connected to tungsten or molybdenum wires may be introduced into the capillary which is then sealed off at one end, evacuated, and heated at the sealing points with an oxyhydrogen flame, the projecting ends of the capillary being then cut off. The capillary may be formed by sealing a rod into a flattened tube of the same glass, or by simultaneously flattening a tube and sealing therein a previously introduced rod.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE204635X | 1937-06-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB504874A true GB504874A (en) | 1939-05-02 |
Family
ID=5782893
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB18919/38A Expired GB504874A (en) | 1937-06-25 | 1938-06-25 | Process for the manufacture of electric lamp bases from hard glass or quartz glass and incandescent lamps incorporating bases made by such process |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US2225726A (en) |
| CH (1) | CH204635A (en) |
| FR (1) | FR839180A (en) |
| GB (1) | GB504874A (en) |
| NL (1) | NL48889C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2481906A (en) * | 1942-04-18 | 1949-09-13 | Chilcot Arthur Leslie | Mounting of electrodes in electric discharge tubes |
-
0
- NL NL48889D patent/NL48889C/xx active
-
1938
- 1938-06-11 FR FR839180D patent/FR839180A/en not_active Expired
- 1938-06-20 CH CH204635D patent/CH204635A/en unknown
- 1938-06-21 US US215030A patent/US2225726A/en not_active Expired - Lifetime
- 1938-06-25 GB GB18919/38A patent/GB504874A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| NL48889C (en) | |
| US2225726A (en) | 1940-12-24 |
| FR839180A (en) | 1939-03-28 |
| CH204635A (en) | 1939-05-15 |
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