GB485798A - Improvements in or relating to electric discharge tubes - Google Patents

Improvements in or relating to electric discharge tubes

Info

Publication number
GB485798A
GB485798A GB8405/37A GB840537A GB485798A GB 485798 A GB485798 A GB 485798A GB 8405/37 A GB8405/37 A GB 8405/37A GB 840537 A GB840537 A GB 840537A GB 485798 A GB485798 A GB 485798A
Authority
GB
United Kingdom
Prior art keywords
grid
suppressor
march
varying
relating
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
GB8405/37A
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of GB485798A publication Critical patent/GB485798A/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
    • H01J21/06—Tubes with a single discharge path having electrostatic control means only
    • H01J21/10—Tubes with a single discharge path having electrostatic control means only with one or more immovable internal control electrodes, e.g. triode, pentode, octode
    • H01J21/12—Tubes with variable amplification factor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2893/00—Discharge tubes and lamps
    • H01J2893/0032—Tubes with variable amplification factor

Landscapes

  • Electrostatic Charge, Transfer And Separation In Electrography (AREA)

Abstract

485,798. Discharge apparatus. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN. March 22, 1937, No. 8405. Convention date, March 25, 1936. Drawings to Specification. [Class 39 (i)] In a discharge tube comprising at least one suppressor-grid pentode system, the control grid of the system has a uniform mesh and one or more of the other electrodes are designed to cause a space charge to be set up on the cathode side of the suppressor grid which has different values at different parts of the grid, whereby the dynamic characteristic is made symmetrical about a suitable working point. The suppressor grid on the screen grid may be wound with a varying pitch or may consist of wire of varying thickness, or the anode may be spaced from the suppressor grid by a varying amount, or combinations of these constructions may be used. Specification 435,383 is referred to.
GB8405/37A 1936-03-25 1937-03-22 Improvements in or relating to electric discharge tubes Expired GB485798A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL485798X 1936-03-25

Publications (1)

Publication Number Publication Date
GB485798A true GB485798A (en) 1938-05-25

Family

ID=19786628

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8405/37A Expired GB485798A (en) 1936-03-25 1937-03-22 Improvements in or relating to electric discharge tubes

Country Status (1)

Country Link
GB (1) GB485798A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2492643A (en) * 1946-01-14 1949-12-27 Sylvania Electric Prod Electron discharge tube

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2492643A (en) * 1946-01-14 1949-12-27 Sylvania Electric Prod Electron discharge tube

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