GB519643A - Improvements in or relating to electron discharge devices - Google Patents

Improvements in or relating to electron discharge devices

Info

Publication number
GB519643A
GB519643A GB28024/38A GB2802438A GB519643A GB 519643 A GB519643 A GB 519643A GB 28024/38 A GB28024/38 A GB 28024/38A GB 2802438 A GB2802438 A GB 2802438A GB 519643 A GB519643 A GB 519643A
Authority
GB
United Kingdom
Prior art keywords
grid
cathode
sept
space
oscillator
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
GB28024/38A
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
Publication of GB519643A publication Critical patent/GB519643A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J21/00—Vacuum tubes
    • H01J21/02—Tubes with a single discharge path
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
    • H03D7/06—Transference of modulation from one carrier to another, e.g. frequency-changing by means of discharge tubes having more than two electrodes
    • H03D7/10—Transference of modulation from one carrier to another, e.g. frequency-changing by means of discharge tubes having more than two electrodes the signals to be mixed being applied between different pairs of electrodes

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Superheterodyne Receivers (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Electron Sources, Ion Sources (AREA)

Abstract

519,643. Thermionic valves. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. Sept. 26, 1938, No. 28024. Convention date, Sept. 25, 1937. [Class 39 (i)] In mixer valves for superheterodyne reception, having local oscillator control grid 20, a screen grid 22 and a radio-signal control-grid 23 arranged in succession between the cathode 16 and anode 15, an additional grid 22a is placed between the grids 22, 23 and connected to the cathode or otherwise maintained at a potential below that of the space when the grid 22a is placed, so that " space-charge coupling " causing the induction of voltages of oscillator frequency in the signal-grid circuit is reduced. An additional screen grid 24 and oscillator-anode rods 21 may be added. The cathode is indirectly heated by a reverse coiled tungsten filament and the electrodes are supported by mica spacers 12.
GB28024/38A 1937-09-25 1938-09-26 Improvements in or relating to electron discharge devices Expired GB519643A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US165633A US2198340A (en) 1937-09-25 1937-09-25 Electron discharge modulating device

Publications (1)

Publication Number Publication Date
GB519643A true GB519643A (en) 1940-04-02

Family

ID=22599759

Family Applications (1)

Application Number Title Priority Date Filing Date
GB28024/38A Expired GB519643A (en) 1937-09-25 1938-09-26 Improvements in or relating to electron discharge devices

Country Status (3)

Country Link
US (1) US2198340A (en)
DE (1) DE708470C (en)
GB (1) GB519643A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2420345A (en) * 1940-12-30 1947-05-13 Hartford Nat Bank & Trust Co Electron discharge device

Also Published As

Publication number Publication date
DE708470C (en) 1941-07-22
US2198340A (en) 1940-04-23

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