GB1368542A - Electric discharge tube including a mesh grid - Google Patents
Electric discharge tube including a mesh gridInfo
- Publication number
- GB1368542A GB1368542A GB532873A GB532873A GB1368542A GB 1368542 A GB1368542 A GB 1368542A GB 532873 A GB532873 A GB 532873A GB 532873 A GB532873 A GB 532873A GB 1368542 A GB1368542 A GB 1368542A
- Authority
- GB
- United Kingdom
- Prior art keywords
- discharge tube
- electric discharge
- tube including
- mesh grid
- zrc
- 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
- H01J19/00—Details of vacuum tubes of the types covered by group H01J21/00
- H01J19/28—Non-electron-emitting electrodes; Screens
- H01J19/38—Control electrodes, e.g. grid
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2893/00—Discharge tubes and lamps
- H01J2893/0001—Electrodes and electrode systems suitable for discharge tubes or lamps
- H01J2893/0012—Constructional arrangements
- H01J2893/0015—Non-sealed electrodes
- H01J2893/0017—Cylindrical, helical or annular grids
Landscapes
- Solid Thermionic Cathode (AREA)
- Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
- Electrostatic Separation (AREA)
- Gas-Filled Discharge Tubes (AREA)
Abstract
1368542 Thermionic valves PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 2 Feb 1973 [5 Feb 1972] 5328/73 Heading H1D A discharge tube includes a cylindrical grid comprising oppositely wound groups of wire helices 1, 2 welded together at each cross point 3, some wires of each group being thicker than the remainder to provide mechanical stability at temperatures up to 2000‹ C. The wires are of Mo and a known method to reduce thermionic emission is described comprising applying coatings of ZrC and Pt or Au; the ZrC is provided by sintering in an inert atmosphere at 2000‹ C.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL7201534A NL7201534A (en) | 1972-02-05 | 1972-02-05 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1368542A true GB1368542A (en) | 1974-09-25 |
Family
ID=19815300
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB532873A Expired GB1368542A (en) | 1972-02-05 | 1973-02-02 | Electric discharge tube including a mesh grid |
Country Status (8)
Country | Link |
---|---|
US (1) | US3806754A (en) |
JP (1) | JPS4889674A (en) |
CA (1) | CA975418A (en) |
CH (1) | CH552282A (en) |
DE (1) | DE2303776C3 (en) |
FR (1) | FR2170208B1 (en) |
GB (1) | GB1368542A (en) |
NL (1) | NL7201534A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3976909A (en) * | 1975-07-11 | 1976-08-24 | Rca Corporation | Wire mesh cathode |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2277148A (en) * | 1941-01-30 | 1942-03-24 | Bell Telephone Labor Inc | Electrode for electron discharge devices |
NL88786C (en) * | 1955-04-02 | |||
US3172002A (en) * | 1960-11-21 | 1965-03-02 | Rca Corp | Cathode mount and method of fabrication |
JPS4329650Y1 (en) * | 1965-11-15 | 1968-12-05 |
-
1972
- 1972-02-05 NL NL7201534A patent/NL7201534A/xx not_active Application Discontinuation
-
1973
- 1973-01-26 DE DE2303776A patent/DE2303776C3/en not_active Expired
- 1973-02-02 US US00329235A patent/US3806754A/en not_active Expired - Lifetime
- 1973-02-02 GB GB532873A patent/GB1368542A/en not_active Expired
- 1973-02-02 JP JP48013033A patent/JPS4889674A/ja active Pending
- 1973-02-02 CH CH147673A patent/CH552282A/en not_active IP Right Cessation
- 1973-02-02 FR FR7303741A patent/FR2170208B1/fr not_active Expired
- 1973-02-02 CA CA162,785A patent/CA975418A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE2303776A1 (en) | 1973-08-09 |
CH552282A (en) | 1974-07-31 |
US3806754A (en) | 1974-04-23 |
DE2303776B2 (en) | 1977-12-15 |
DE2303776C3 (en) | 1978-08-10 |
FR2170208B1 (en) | 1977-08-26 |
FR2170208A1 (en) | 1973-09-14 |
CA975418A (en) | 1975-09-30 |
NL7201534A (en) | 1973-08-07 |
JPS4889674A (en) | 1973-11-22 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |