GB490628A - Improvements in and relating to stems for electric lamps and the like - Google Patents
Improvements in and relating to stems for electric lamps and the likeInfo
- Publication number
- GB490628A GB490628A GB22967/37A GB2296737A GB490628A GB 490628 A GB490628 A GB 490628A GB 22967/37 A GB22967/37 A GB 22967/37A GB 2296737 A GB2296737 A GB 2296737A GB 490628 A GB490628 A GB 490628A
- Authority
- GB
- United Kingdom
- Prior art keywords
- stem
- tube
- flattened
- leading
- glass
- 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
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J5/00—Details relating to vessels or to leading-in conductors common to two or more basic types of discharge tubes or lamps
- H01J5/32—Seals for leading-in conductors
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T403/00—Joints and connections
- Y10T403/21—Utilizing thermal characteristic, e.g., expansion or contraction, etc.
Landscapes
- Vessels And Coating Films For Discharge Lamps (AREA)
- Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
Abstract
490,628. Sealing electric conductors into glass. BRITISH THOMSON-HOUSTON CO., Ltd. Aug. 21, 1937, No. 22967. Convention date, Aug. 22, 1936. [Class 36] [Also in Group XI] A stem for an electric lamp or similar device comprises a glass stem tube 10, Fig. 3, into which is sealed a leading-in wire or wires 12, 13 having a flattened portion 14 embedded by fusing and pinching the lower end of the stem tube, the fused portion of the latter being flattened so as to have its flattened surfaces at right-angles to the flattened part of the wire and substantially parallel to the tube. The transverse cross-section of the stem press is approximately I-shaped, with the flattened parts of the leading-in wires situated in the outer portions thereof. In forming the stem, the exhausting-tube 11 is mounted concentrically with the stem tube 10, with the leading- in wires 13, 14 extending longitudinally within the space between them, and heat is applied to the lower end of the stem tube to bring that portionandthe adjacent part of the exhausting- tube into a plastic condition. The mass is then pressed together by matrices 15, 16 of the form shown in Fig. 6, which are fastened to clamping-jaws 17, 18 adapted to be pivoted on a fixed block and operated simultaneously by a pair of links. In a modification the pinching is effected by a pair of pivoted jaws which press upon opposite sides of the softened stem tube while a pair of co-operating matrices mounted upon sliding carriers are moved laterally in opposite directions to confine the lateral spread of the glass. Specifications 223,204, [Class 39 (ii)], and 474,004 are referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US97358A US2143690A (en) | 1936-08-22 | 1936-08-22 | Stem for electric lamps and similar devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB490628A true GB490628A (en) | 1938-08-18 |
Family
ID=22262956
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB22967/37A Expired GB490628A (en) | 1936-08-22 | 1937-08-21 | Improvements in and relating to stems for electric lamps and the like |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2143690A (en) |
| GB (1) | GB490628A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2844919A (en) * | 1951-03-21 | 1958-07-29 | Gen Electric | Quartz-to-metal foil press seal |
| BE517821A (en) * | 1952-02-23 |
-
1936
- 1936-08-22 US US97358A patent/US2143690A/en not_active Expired - Lifetime
-
1937
- 1937-08-21 GB GB22967/37A patent/GB490628A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2143690A (en) | 1939-01-10 |
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