GB496705A - Improvements in or relating to electric discharge tubes utilising secondary emission - Google Patents
Improvements in or relating to electric discharge tubes utilising secondary emissionInfo
- Publication number
- GB496705A GB496705A GB23721/37A GB2372137A GB496705A GB 496705 A GB496705 A GB 496705A GB 23721/37 A GB23721/37 A GB 23721/37A GB 2372137 A GB2372137 A GB 2372137A GB 496705 A GB496705 A GB 496705A
- Authority
- GB
- United Kingdom
- Prior art keywords
- anode
- electrode
- electrons
- beams
- electrodes
- 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
- H01J43/00—Secondary-emission tubes; Electron-multiplier tubes
- H01J43/02—Tubes in which one or a few electrodes are secondary-electron emitting electrodes
Landscapes
- Discharge Lamp (AREA)
- Cold Cathode And The Manufacture (AREA)
Abstract
496,705. Electron beam valves and multipliers. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN. Aug. 30, 1937, No. 23721. Convention date, Sept. 1, 1936. [Class 39 (i)] In a discharge tube, one or more separate primary electron beams impinge partly on an anode 4 and partly on a secondary-emission electrode 5, the arrangement being such that when the anode potential increases the beams widen and the number of electrons diverted to the anode is increased, while the number of primary electrons passing to the secondaryemission electrode and consequently the number of secondary electrons collected by the anode is decreased ; an undesirable decrease in internal resistance is thereby avoided. In one form electrons from cathode 1, Fig. 1, are formed into four beams by rod control electrodes 2 and pass between screening electrodes 3 to anode 4 and secondary electrode 5 which completely surrounds the other electrodes. In another form, the secondary emission layer 6 does not completely cover the area of electrode 5 struck by the beam, so that on widening the beam the reduction in secondary emission is enhanced. The edge of the layer 6 may be shaped or serrated, Figs. 3, 4 (not shown), to adjust the characteristic to desired shape. The Specification as open to inspection under Sect. 91 includes also arrangements in which the anode is not struck by any part of the primary beam. This subject-matter does not appear in the Specification as accepted.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL201099X | 1936-09-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB496705A true GB496705A (en) | 1938-12-05 |
Family
ID=19778338
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB23721/37A Expired GB496705A (en) | 1936-09-01 | 1937-08-30 | Improvements in or relating to electric discharge tubes utilising secondary emission |
Country Status (5)
Country | Link |
---|---|
US (1) | US2167097A (en) |
BE (1) | BE423376A (en) |
CH (1) | CH201099A (en) |
GB (1) | GB496705A (en) |
NL (1) | NL47224C (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2528437A (en) * | 1945-08-04 | 1950-10-31 | Ivan L Joy | Multiple anode tube and method of employing the same in testing apparatus |
GB683061A (en) * | 1948-01-24 | 1952-11-19 | Emi Ltd | Improvements relating to thermionic valves utilising secondary electron emission amplification |
-
0
- NL NL47224D patent/NL47224C/xx active
- BE BE423376D patent/BE423376A/xx unknown
-
1937
- 1937-08-25 US US160796A patent/US2167097A/en not_active Expired - Lifetime
- 1937-08-30 CH CH201099D patent/CH201099A/en unknown
- 1937-08-30 GB GB23721/37A patent/GB496705A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
NL47224C (en) | |
CH201099A (en) | 1938-11-15 |
BE423376A (en) | |
US2167097A (en) | 1939-07-25 |
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