GB426760A - Improvements in or relating to thermionic valves and other electron discharge devices - Google Patents
Improvements in or relating to thermionic valves and other electron discharge devicesInfo
- Publication number
- GB426760A GB426760A GB24673/34A GB2467334A GB426760A GB 426760 A GB426760 A GB 426760A GB 24673/34 A GB24673/34 A GB 24673/34A GB 2467334 A GB2467334 A GB 2467334A GB 426760 A GB426760 A GB 426760A
- Authority
- GB
- United Kingdom
- Prior art keywords
- discharge
- electrons
- aug
- suspension
- coated
- 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
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract 3
- 239000000725 suspension Substances 0.000 abstract 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 abstract 1
- 241000779819 Syncarpia glomulifera Species 0.000 abstract 1
- 229910052799 carbon Inorganic materials 0.000 abstract 1
- 230000001419 dependent effect Effects 0.000 abstract 1
- 239000011521 glass Substances 0.000 abstract 1
- 239000006233 lamp black Substances 0.000 abstract 1
- 239000001739 pinus spp. Substances 0.000 abstract 1
- 230000000391 smoking effect Effects 0.000 abstract 1
- 238000005507 spraying Methods 0.000 abstract 1
- 229940036248 turpentine Drugs 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
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
- H01J5/02—Vessels; Containers; Shields associated therewith; Vacuum locks
- H01J5/08—Vessels; Containers; Shields associated therewith; Vacuum locks provided with coatings on the walls thereof; Selection of materials for the coatings
Landscapes
- Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
- Electrostatic Spraying Apparatus (AREA)
Abstract
426,760. Discharge apparatus. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., Electra House, Victoria Embankment, London. (Assignees of Thompson, H. C. ; 303, West 105th Street, New York, U.S.A.) Aug. 27, 1934, No. 24673. Convention date, Aug. 31, 1933. Drawings to Specification. [Class 39 (i)] A discharge tube such as a thermionic valve comprising a control electrode controlling the discharge in dependence upon input potentials applied thereto and an anode feeding a high impedance load circuit with a current or potential dependent upon the input potential has the inner wall of the envelope treated, covered or coated to reduce secondary electron emissivity over at least that part of the envelope liable to be impinged upon by electrons from the discharge. The wall may be coated with a matte or diffusing surface such that fewer secondary electrons are emitted than primary electrons are received, or such that the secondary electron emissivity is less than that of glass. The portion of the bulb surrounding the electrode system of a pentode used in an amplifying system may be covered with finely divided carbon, either by smoking the bulb with a turpentine torch or by spraying it with a suspension of lampblack in alcohol and wiping off the deposit excepting that around the electrodes. A suspension of finely divided aluminium oxide in water may be used instead.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US687565A US2035003A (en) | 1933-08-31 | 1933-08-31 | Electron discharge device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB426760A true GB426760A (en) | 1935-04-09 |
Family
ID=24760913
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB24673/34A Expired GB426760A (en) | 1933-08-31 | 1934-08-27 | Improvements in or relating to thermionic valves and other electron discharge devices |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US2035003A (en) |
| BE (1) | BE404985A (en) |
| FR (1) | FR776056A (en) |
| GB (1) | GB426760A (en) |
| NL (1) | NL42504C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2584994A (en) * | 1946-03-15 | 1952-02-12 | Int Standard Electric Corp | Nonemissive electrode and method of manufacturing |
| US2494670A (en) * | 1946-04-26 | 1950-01-17 | Rca Corp | Electronic discharge device |
| US2527514A (en) * | 1947-08-19 | 1950-10-31 | Int Standard Electric Corp | Nonemissive electrode for use in electron discharge devices |
| US2605442A (en) * | 1948-03-19 | 1952-07-29 | Sylvania Electric Prod | Electron discharge device |
| FR2520553A1 (en) * | 1982-01-22 | 1983-07-29 | Cameca | ELECTRONIC OPTICAL APPARATUS COMPRISING PYROLYTIC GRAPHITE ELEMENTS |
-
0
- NL NL42504D patent/NL42504C/xx active
- BE BE404985D patent/BE404985A/xx unknown
-
1933
- 1933-08-31 US US687565A patent/US2035003A/en not_active Expired - Lifetime
-
1934
- 1934-07-17 FR FR776056D patent/FR776056A/en not_active Expired
- 1934-08-27 GB GB24673/34A patent/GB426760A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR776056A (en) | 1935-01-16 |
| US2035003A (en) | 1936-03-24 |
| BE404985A (en) | |
| NL42504C (en) |
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