GB457276A - Improvements in or relating to thermionic valve circuit arrangements - Google Patents

Improvements in or relating to thermionic valve circuit arrangements

Info

Publication number
GB457276A
GB457276A GB15169/35A GB1516935A GB457276A GB 457276 A GB457276 A GB 457276A GB 15169/35 A GB15169/35 A GB 15169/35A GB 1516935 A GB1516935 A GB 1516935A GB 457276 A GB457276 A GB 457276A
Authority
GB
United Kingdom
Prior art keywords
grid
valve
screen
current
cessation
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
Application number
GB15169/35A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Marconis Wireless Telegraph Co Ltd
BAE Systems Electronics Ltd
Original Assignee
Marconis Wireless Telegraph Co Ltd
Marconi Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Marconis Wireless Telegraph Co Ltd, Marconi Co Ltd filed Critical Marconis Wireless Telegraph Co Ltd
Priority to GB15169/35A priority Critical patent/GB457276A/en
Priority to DEM134579D priority patent/DE676589C/en
Priority to US81361A priority patent/US2129088A/en
Publication of GB457276A publication Critical patent/GB457276A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/52—Circuit arrangements for protecting such amplifiers
    • H03F1/54—Circuit arrangements for protecting such amplifiers with tubes only
    • H03F1/548—Protection of anode or grid circuit against overload

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Particle Accelerators (AREA)
  • Microwave Amplifiers (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Amplifiers (AREA)

Abstract

457,276. Valve circuits. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., Electra House, Victoria Embankment, London, and GEORGE, D. F., The Chalet, Shenfield Gardens, Hutton, Essex. May 24, 1935, No. 15169. [Class 40 (v)] A protective arrangement to prevent damage to thermionic valves due to rapid rise in anode current on cessation of grid current when the loading oscillations fail from any reason utilizes the drop in grid current to energize a device which reduces the screen-grid voltage of the valve to such an extent that the anode current is reduced to a low value. The Figure shows a screen-grid transmitting amplifier valve 1 fed from the drive oscillator through condenser 14. A gas-discharge tube 7 of the " Thyratron " (Registered Trade Mark) type is connected across the screen grid-cathode circuit, and its control grid is connected to a tapping on the control grid resistance 4 of the valve 1. On cessation of grid current the valve 7 is energized to reduce the screen gridcathode potential to about 15 volts.
GB15169/35A 1935-05-24 1935-05-24 Improvements in or relating to thermionic valve circuit arrangements Expired GB457276A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB15169/35A GB457276A (en) 1935-05-24 1935-05-24 Improvements in or relating to thermionic valve circuit arrangements
DEM134579D DE676589C (en) 1935-05-24 1936-05-23 Arrangement to protect pipes with screen grids against overcurrents
US81361A US2129088A (en) 1935-05-24 1936-05-23 Thermionic valve circuit arrangement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB15169/35A GB457276A (en) 1935-05-24 1935-05-24 Improvements in or relating to thermionic valve circuit arrangements

Publications (1)

Publication Number Publication Date
GB457276A true GB457276A (en) 1936-11-24

Family

ID=10054242

Family Applications (1)

Application Number Title Priority Date Filing Date
GB15169/35A Expired GB457276A (en) 1935-05-24 1935-05-24 Improvements in or relating to thermionic valve circuit arrangements

Country Status (3)

Country Link
US (1) US2129088A (en)
DE (1) DE676589C (en)
GB (1) GB457276A (en)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2942548A (en) * 1943-03-17 1960-06-28 Gilbert R Bushong Oscillator-thyratron circuit
DE961555C (en) * 1944-07-29 1957-04-11 Siemens Ag Circuit arrangement for generating high-frequency vibrations for industrial purposes
DE948790C (en) * 1944-08-24 1956-09-06 Lorenz C Ag The arrangement used for pulse sensing of multi-stage high-frequency transmitters, in which the power output stage is briefly supplied with a high anode voltage during the time intervals corresponding to the pulses
US2492196A (en) * 1946-09-14 1949-12-27 Standard Telephones Cables Ltd Grid biasing system
US2624195A (en) * 1946-10-25 1953-01-06 Borg George W Corp Dew point hygrometer
US2548246A (en) * 1946-12-11 1951-04-10 Girdler Corp Arc-over protective system for high-frequency heating systems
US2572832A (en) * 1948-05-24 1951-10-30 William B Bernard Tube protection circuit
US2845529A (en) * 1953-04-06 1958-07-29 James O Weldon Protective circuits
DE959569C (en) * 1954-02-25 1957-03-07 Bbc Brown Boveri & Cie Procedure for protecting tube generators against impermissible operating conditions in the event of unloading and against overload
US2848606A (en) * 1954-03-11 1958-08-19 Gen Electric Electronic protective device
US2951120A (en) * 1957-02-15 1960-08-30 Jr Edward Nelson Dingley Apparatus for detecting malfunctions in telegraph systems
NL216899A (en) * 1957-05-02
US3038127A (en) * 1959-04-21 1962-06-05 Bendix Corp Protection circuit for transistorized power converter
US3225254A (en) * 1961-06-02 1965-12-21 Trw Inc Protective circuit
US3921078A (en) * 1971-04-20 1975-11-18 Jeol Ltd Breakdown protection for field emission electron gun

Also Published As

Publication number Publication date
US2129088A (en) 1938-09-06
DE676589C (en) 1939-06-08

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