GB455446A - Improvements in or relating to grids for electric discharge devices - Google Patents

Improvements in or relating to grids for electric discharge devices

Info

Publication number
GB455446A
GB455446A GB1772335A GB1772335A GB455446A GB 455446 A GB455446 A GB 455446A GB 1772335 A GB1772335 A GB 1772335A GB 1772335 A GB1772335 A GB 1772335A GB 455446 A GB455446 A GB 455446A
Authority
GB
United Kingdom
Prior art keywords
mms
grid
wires
shadow ratio
helix
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
GB1772335A
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.)
DONALD ARTHUR BOYLAND
STEPHEN MICHAEL DUKE
MO Valve Co Ltd
Original Assignee
DONALD ARTHUR BOYLAND
STEPHEN MICHAEL DUKE
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 DONALD ARTHUR BOYLAND, STEPHEN MICHAEL DUKE, MO Valve Co Ltd filed Critical DONALD ARTHUR BOYLAND
Priority to GB1772335A priority Critical patent/GB455446A/en
Publication of GB455446A publication Critical patent/GB455446A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J19/00—Details of vacuum tubes of the types covered by group H01J21/00
    • H01J19/28—Non-electron-emitting electrodes; Screens
    • H01J19/38—Control electrodes, e.g. grid
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2893/00—Discharge tubes and lamps
    • H01J2893/0001—Electrodes and electrode systems suitable for discharge tubes or lamps
    • H01J2893/0012—Constructional arrangements
    • H01J2893/0015—Non-sealed electrodes
    • H01J2893/0018—Bar or cage-like grids

Abstract

455,446. Discharge apparatus. M-O VALVE CO., Ltd., Electra House, Victoria Embankment, London, and BOYLAND, D. A., and DUKE, S. M., c/o General Electric Co., Ltd., Wembley, Middlesex. June 20, 1935, No. 17723. [Class 39 (i)] A large electric discharge device dissipating at least 10 kw. of power comprises a cylindrical or like closed grid electrode having an area considerably exceeding 10 cm.<2> and a shadow ratio not greater than 1 /100 and consisting of an open mesh built up of intersecting wires, all of the same diameter and rigidly affixed to each other at all their contacts by welding or the like. An increase of rigidity for a smaller shadow ratio is obtained. A grid is shown suitable for a triode adapted to dissipate 50 kw. and comprises 24 parallel wires 1 stretched between ring end supports 3, 31 and a helix 2 wound round them and welded at each contact. Both 1 and 2 are molybdenum wires 0À3 mms. in diameter. The grid is 400 mms. long and 80 mms. wide, and the pitch of the helix is about 10 mms., the mesh thus consisting of approximate squares giving a shadow ratio of 1/900. Specifications 398,101, 439,153, and 441,849 are referred to.
GB1772335A 1935-06-20 1935-06-20 Improvements in or relating to grids for electric discharge devices Expired GB455446A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1772335A GB455446A (en) 1935-06-20 1935-06-20 Improvements in or relating to grids for electric discharge devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1772335A GB455446A (en) 1935-06-20 1935-06-20 Improvements in or relating to grids for electric discharge devices

Publications (1)

Publication Number Publication Date
GB455446A true GB455446A (en) 1936-10-21

Family

ID=10100088

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1772335A Expired GB455446A (en) 1935-06-20 1935-06-20 Improvements in or relating to grids for electric discharge devices

Country Status (1)

Country Link
GB (1) GB455446A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE868320C (en) * 1950-03-21 1953-02-23 Siemens Ag Electron tubes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE868320C (en) * 1950-03-21 1953-02-23 Siemens Ag Electron tubes

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