GB650448A - Improvements relating to electron discharge tubes - Google Patents
Improvements relating to electron discharge tubesInfo
- Publication number
- GB650448A GB650448A GB6493/47A GB649347A GB650448A GB 650448 A GB650448 A GB 650448A GB 6493/47 A GB6493/47 A GB 6493/47A GB 649347 A GB649347 A GB 649347A GB 650448 A GB650448 A GB 650448A
- Authority
- GB
- United Kingdom
- Prior art keywords
- filament
- welded
- spring
- slot
- improvements relating
- 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
- H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
- H01J1/02—Main electrodes
- H01J1/13—Solid thermionic cathodes
- H01J1/15—Cathodes heated directly by an electric current
- H01J1/18—Supports; Vibration-damping arrangements
Landscapes
- Electrodes For Cathode-Ray Tubes (AREA)
- Solid Thermionic Cathode (AREA)
Abstract
650,448. Thermionic valves. SYLVANIA ELECTRIC PRODUCTS, Inc. March 7, 1947, No. 6493. Convention date, May 6, 1942. [Class 39 (i)] A tensioning arrangement for a filament 4 comprises a hairpin spring having a middle portion 7 of V-shape and linear end portions 20, 21 which are deflected from the unstressed positions 15<SP>1</SP>, 16<SP>1</SP> to provide a predetermined tension. Tabs 5, 6 on the filament are welded to the spring and to a support 3. A second support 2 with welded cross-arms 11, 13 carries the spring, the ends of which are welded at 17, 18 where heating does not affect the tension of the filament. The filament 4 passes through triangular slots 31, Fig. 7, in upper and lower mica discs 27 between which the other electrodes 29, 30 are mounted, the filament being pulled into a corner of one slot and on to an edge of the other slot.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US441886A US2728017A (en) | 1942-05-06 | 1942-05-06 | Filament tensioning and supporting arrangements for electron tubes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB650448A true GB650448A (en) | 1951-02-21 |
Family
ID=23754680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB6493/47A Expired GB650448A (en) | 1942-05-06 | 1947-03-07 | Improvements relating to electron discharge tubes |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2728017A (en) |
| GB (1) | GB650448A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2915668A (en) * | 1955-01-14 | 1959-12-01 | Sylvania Electric Prod | Filament tensioning device |
| US3244928A (en) * | 1955-10-03 | 1966-04-05 | Sylvania Electric Prod | Filament suspension |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1566292A (en) * | 1922-05-26 | 1925-12-22 | Pass & Seymour Inc | Electric switch |
| US1675073A (en) * | 1925-02-10 | 1928-06-26 | Westinghouse Lamp Co | Rectifier tube |
| NL28874C (en) * | 1929-09-25 | |||
| US2146361A (en) * | 1937-02-15 | 1939-02-07 | Mcgill Metal Products Company | Animal trap |
| US2259703A (en) * | 1940-09-07 | 1941-10-21 | Rca Corp | Filamentary cathode support |
| US2438377A (en) * | 1945-07-26 | 1948-03-23 | Mcgill Metal Products Corp | Barrier for animal traps |
-
1942
- 1942-05-06 US US441886A patent/US2728017A/en not_active Expired - Lifetime
-
1947
- 1947-03-07 GB GB6493/47A patent/GB650448A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2728017A (en) | 1955-12-20 |
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