GB515288A - Improvements in and relating to electric discharge devices - Google Patents

Improvements in and relating to electric discharge devices

Info

Publication number
GB515288A
GB515288A GB1780738A GB1780738A GB515288A GB 515288 A GB515288 A GB 515288A GB 1780738 A GB1780738 A GB 1780738A GB 1780738 A GB1780738 A GB 1780738A GB 515288 A GB515288 A GB 515288A
Authority
GB
United Kingdom
Prior art keywords
grid
wire
cathode
parts
class
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
GB1780738A
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.)
ERNEST CHARLES REGINALD GANT
MO Valve Co Ltd
Original Assignee
ERNEST CHARLES REGINALD GANT
MO Valve 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 ERNEST CHARLES REGINALD GANT, MO Valve Co Ltd filed Critical ERNEST CHARLES REGINALD GANT
Priority to GB1780738A priority Critical patent/GB515288A/en
Publication of GB515288A publication Critical patent/GB515288A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
    • H01J1/02—Main electrodes
    • H01J1/13—Solid thermionic cathodes
    • H01J1/15—Cathodes heated directly by an electric current
    • H01J1/18—Supports; Vibration-damping arrangements

Landscapes

  • Solid Thermionic Cathode (AREA)
  • Electron Sources, Ion Sources (AREA)

Abstract

515,288. Thermionic valves. M-O VALVE CO., Ltd., COSGROVE, C. W., and GANT, E. C. R. June 15, 1938, No. 17807. [Class 39 (i)] In a thermionic valve comprising at least one wire grid closely surrounding the cathode, part or parts of the wire forming this grid is or are coated with adherent insulating material and displaced relatively to neighbouring non- insulated parts of the grid so as to bear against and locate the cathode. In the form shown, the wire grid 2.wound on supports 3 has deformed parts 4, 4<1> coated with adherent insulating layers 5, 51 bearing against the filament 1. The insulation material such as magnesia or alumina, may be applied, for example, by painting or spraying a suspension, before or after the deformation. The cathode may be indirectly heated. The Provisional Specification describes a grid formed of a plurality of wires welded to supports, a kinked or bowed wire being substituted for one of the grid wires, and refers to a grid formed of wire mesh and to the use of porcelain as the insulating material. Specifications 285,537, and 295,904, [both in Class 39 (i)], are referred to.
GB1780738A 1938-06-15 1938-06-15 Improvements in and relating to electric discharge devices Expired GB515288A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1780738A GB515288A (en) 1938-06-15 1938-06-15 Improvements in and relating to electric discharge devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1780738A GB515288A (en) 1938-06-15 1938-06-15 Improvements in and relating to electric discharge devices

Publications (1)

Publication Number Publication Date
GB515288A true GB515288A (en) 1939-11-30

Family

ID=10101569

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1780738A Expired GB515288A (en) 1938-06-15 1938-06-15 Improvements in and relating to electric discharge devices

Country Status (1)

Country Link
GB (1) GB515288A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2570606A (en) * 1949-05-12 1951-10-09 Rca Corp Damper bar for filamentary cathodes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2570606A (en) * 1949-05-12 1951-10-09 Rca Corp Damper bar for filamentary cathodes

Similar Documents

Publication Publication Date Title
US2263164A (en) Anode
GB647954A (en) Electric gaseous discharge lamp cathode
GB515288A (en) Improvements in and relating to electric discharge devices
US2295569A (en) Gaseous electron discharge device
US2212827A (en) Hot cathode for high power
US2303514A (en) Vapor electric device
US2401040A (en) Method of making electronic tubes
US2329118A (en) Electrode for electrical discharge devices
GB419096A (en) Improvements in thermionic cathodes
GB492983A (en) Improvements in or relating to electron discharge valves
US1894059A (en) Process for producing electron emitters and the product
US2263169A (en) Indirectly heated cathode
US2214974A (en) Electrode for electric discharge devices
GB560844A (en) Improvements in and relating to cathodes for electrical discharge devices
GB1100420A (en) Improvements in thermionic valves
US2260274A (en) Electron tube device
US2219925A (en) Vacuum tube device
DE692100C (en) Electric high pressure metal vapor discharge lamp w
GB1278381A (en) Improvements in or relating to getters
GB477787A (en) Electric discharge tube
GB248648A (en) Improvements in or relating to electrodes for thermionic valves
GB439792A (en) Grid electrode for electron tubes
GB365303A (en) Electron tube with incandescent cathode
GB241216A (en) Improvements in and relating to electron discharge apparatus
GB582162A (en) Improvements in thermionic valves adapted to operate at very high frequencies