GB386376A - Improvements in and relating to electric discharge devices - Google Patents
Improvements in and relating to electric discharge devicesInfo
- Publication number
- GB386376A GB386376A GB28128/31A GB2812831A GB386376A GB 386376 A GB386376 A GB 386376A GB 28128/31 A GB28128/31 A GB 28128/31A GB 2812831 A GB2812831 A GB 2812831A GB 386376 A GB386376 A GB 386376A
- Authority
- GB
- United Kingdom
- Prior art keywords
- heater
- discs
- casing
- pinch
- grid
- 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
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract 2
- AYJRCSIUFZENHW-UHFFFAOYSA-L barium carbonate Chemical compound [Ba+2].[O-]C([O-])=O AYJRCSIUFZENHW-UHFFFAOYSA-L 0.000 abstract 2
- 238000010891 electric arc Methods 0.000 abstract 2
- 229910052751 metal Inorganic materials 0.000 abstract 2
- 239000002184 metal Substances 0.000 abstract 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract 1
- 229910018487 Ni—Cr Inorganic materials 0.000 abstract 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract 1
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 abstract 1
- 239000011521 glass Substances 0.000 abstract 1
- 229910002804 graphite Inorganic materials 0.000 abstract 1
- 239000010439 graphite Substances 0.000 abstract 1
- 239000011261 inert gas Substances 0.000 abstract 1
- 238000007689 inspection Methods 0.000 abstract 1
- 229910052742 iron Inorganic materials 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 abstract 1
- 229910052753 mercury Inorganic materials 0.000 abstract 1
- 230000004048 modification Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
- 125000006850 spacer group Chemical group 0.000 abstract 1
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
- H01J1/20—Cathodes heated indirectly by an electric current; Cathodes heated by electron or ion bombardment
Landscapes
- Plasma Technology (AREA)
- Solid Thermionic Cathode (AREA)
Abstract
386,376. Discharge apparatus. BRITISH THOMSON-HOUSTON CO., Ltd., Crown House, Aldwych, London.-(Assignees of Pike, O. W. ; 1130, Palmer Avenue, and Hull, A. W. ; 1435, Lowell Road, both in Schenectady, New York, U.S.A.) Oct. 9, 1931, No. 28128. Convention date, Oct. 9, 1930. [Class 39 (i).] Cathodes for electric discharge devices, such as power devices with grid-controlled arc discharges, comprise a heater in a metal casing which is formed from the material of, and is integral with, a plurality of transverse discs extending normally to the casing. The discs 35, Fig. 2, have upset flanges 37, 38 fitting one within another and forming a cylindrical casing for the heater 20. The discs are positioned by bolts 40 and spacers 41 - and are surrounded by perforated cylindrical heat-shields 28. The discs and other internal parts of the cathode may be coated with barium carbonate. The shields have end covers 24, 30 and act with flexible leads 31 as a return lead for the top end of the heater. The heater 20 is wound on an alumina rod 21 around a wire 34. In a highly-evacuated device or a device operating with an arc discharge in an inert gas or mercury vapour at 1 mm., this cathode is supported by channels 17, Fig. 1, from a pinch 3 - with heat shields 19. A graphite anode is supported by a rod 15 and a pinch 4 and is surrounded by a grid 8 of oxidized nickelchromium supported from a clamp 10 with a lead 11. The grid has a ring extension 12 lowering the starting voltage and a ring 14 preventing discharges in the space above this ring 14. A shield 6 prevents glow-discharges near the pinch 4. The Specification as open to inspection under Sect. 91 comprises also a modification in which the cathode comprises discs with flanges welded to a cylindrical casing containing the heater, this casing being sealed to an iron tank, forming the vacuum envelope, by glass and metal cylinders sealed end to end. This subject matter does not appear in the Specification as accepted.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US487541A US1924375A (en) | 1930-10-09 | 1930-10-09 | Cathode structure for thermionic devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB386376A true GB386376A (en) | 1933-01-19 |
Family
ID=23936153
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB28128/31A Expired GB386376A (en) | 1930-10-09 | 1931-10-09 | Improvements in and relating to electric discharge devices |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US1924375A (en) |
| GB (1) | GB386376A (en) |
| NL (1) | NL33389C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2418117A (en) * | 1944-05-29 | 1947-04-01 | Bell Telephone Labor Inc | Electron discharge device |
| US2513255A (en) * | 1948-03-03 | 1950-06-27 | Electrons Inc | Grid control metal envelope gas tube |
| NL159006C (en) * | 1950-02-15 |
-
0
- NL NL33389D patent/NL33389C/xx active
-
1930
- 1930-10-09 US US487541A patent/US1924375A/en not_active Expired - Lifetime
-
1931
- 1931-10-09 GB GB28128/31A patent/GB386376A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| NL33389C (en) | |
| US1924375A (en) | 1933-08-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB725046A (en) | Improvements in and relating to high pressure mercury vapour lamps | |
| US2549355A (en) | Fluorescent lamp | |
| GB495846A (en) | Improvements in and relating to electric discharge devices | |
| US2399003A (en) | Electric discharge device | |
| GB810301A (en) | Improvements in electrodes for fluorescent electric discharge lamps | |
| GB542495A (en) | Improvements in thermionic cathode structures for electric discharge devices | |
| GB386376A (en) | Improvements in and relating to electric discharge devices | |
| GB346957A (en) | Improvements in and relating to electron discharge devices | |
| US2492666A (en) | Hydrogen-filled thyratron | |
| US1749780A (en) | Incandescent-cathode device | |
| US1924319A (en) | Cathode structure for thermionic devices | |
| GB543403A (en) | Improvements in or relating to the manufacture of electron discharge devices | |
| GB550551A (en) | Improvements in and relating to gettering arrangements for highly evacuated envelopes of electron discharge tubes | |
| GB309442A (en) | Improvements in and relating to electron discharge devices | |
| GB375851A (en) | Improvements in and relating to electric discharge devices | |
| GB562178A (en) | Improvements in and relating to electric discharge devices | |
| US2282229A (en) | Shielding of grid supports | |
| US3704927A (en) | Apparatus for making fluorescent lamps | |
| GB437167A (en) | Improvements in or connected with electric discharge devices | |
| USRE19870E (en) | Electron discharge device with | |
| US2075208A (en) | Electron discharge device | |
| US2200089A (en) | Low grid current glow tube | |
| GB542393A (en) | Improvements in electric discharge apparatus | |
| US2269860A (en) | Thimble seal for vacuum tubes | |
| GB256651A (en) | Improvements in electric discharge devices |