GB308085A - Improvements in or relating to thermionic generators and the like - Google Patents
Improvements in or relating to thermionic generators and the likeInfo
- Publication number
- GB308085A GB308085A GB833628A GB833628A GB308085A GB 308085 A GB308085 A GB 308085A GB 833628 A GB833628 A GB 833628A GB 833628 A GB833628 A GB 833628A GB 308085 A GB308085 A GB 308085A
- Authority
- GB
- United Kingdom
- Prior art keywords
- grid
- tubes
- valve
- negative
- transformer
- 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
- H03—ELECTRONIC CIRCUITRY
- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
- H03B5/08—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance
- H03B5/10—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being vacuum tube
Landscapes
- Pipeline Systems (AREA)
Abstract
308,085. Dicker, S. G. S., (Naamlooze Vennootschap Philips' Gloeilampenfabrieken). March 19, 1928. Thermionic generators and amplifiers.-Thermionic oscillation generators, of the self-excited or separately-excited types, have one or more discharge tubes connected in the grid-leak circuit, the breakdown voltage of these tubes being at least equal to the required minimum negative grid voltage, and a voltage source at least equal in value to the breakdown voltage is connected in parallel with the tube or tubes. As shown in Fig. 2, the grid circuit of the valve 1 is coupled through the coil 6 to a master oscillator. The grid leak path comprises a choke coil 7, a resistance 8, and one or more sets of glowdischarge tubes 9, 15 with separate series resistances 18, 19. When the valve 1 is in operation, the grid becomes more and more negative until the tubes break down. Should the valve cease to operate, the grid is held negative by the transformer 14 and rectifier 13 which are connected. in series with a resistance 12 across the discharge tubes 9, 15. The transformer 14 may be fed from mains. The negative bias is smoothed by a condenser 26. A battery may replace the transformer 14 and rectifier 13. For the selfexciting oscillator shown in Fig. 3, the glowdischarge tubes may be replaced by a triode valve 21, the grid 23 of which is negatively biased by a battery 25 so as to pass current only when the grid voltage of the main valve 1 has reached a required value.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB833628A GB308085A (en) | 1928-03-19 | 1928-03-19 | Improvements in or relating to thermionic generators and the like |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB833628A GB308085A (en) | 1928-03-19 | 1928-03-19 | Improvements in or relating to thermionic generators and the like |
Publications (1)
Publication Number | Publication Date |
---|---|
GB308085A true GB308085A (en) | 1929-03-21 |
Family
ID=9850577
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB833628A Expired GB308085A (en) | 1928-03-19 | 1928-03-19 | Improvements in or relating to thermionic generators and the like |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB308085A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3169612A (en) * | 1960-07-05 | 1965-02-16 | Frantz Mfg Company | Overhead door construction |
-
1928
- 1928-03-19 GB GB833628A patent/GB308085A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3169612A (en) * | 1960-07-05 | 1965-02-16 | Frantz Mfg Company | Overhead door construction |
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