GB893672A - Improvements in or relating to the manufacture of wire-wound grids for electron-discharge tubes - Google Patents

Improvements in or relating to the manufacture of wire-wound grids for electron-discharge tubes

Info

Publication number
GB893672A
GB893672A GB7360/58A GB736058A GB893672A GB 893672 A GB893672 A GB 893672A GB 7360/58 A GB7360/58 A GB 7360/58A GB 736058 A GB736058 A GB 736058A GB 893672 A GB893672 A GB 893672A
Authority
GB
United Kingdom
Prior art keywords
wire
mandrel
heated
grid
electron
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
GB7360/58A
Inventor
Alexander Rizo Rangabe
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.)
Plessey Co Ltd
Original Assignee
Plessey 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 Plessey Co Ltd filed Critical Plessey Co Ltd
Priority to GB7360/58A priority Critical patent/GB893672A/en
Priority to CH7045759A priority patent/CH367571A/en
Priority to FR788559A priority patent/FR1218270A/en
Publication of GB893672A publication Critical patent/GB893672A/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
    • 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
    • H01J2893/0019—Chemical composition and manufacture
    • H01J2893/0022—Manufacture
    • H01J2893/0025—Manufacture by winding wire upon a support

Landscapes

  • Printing Plates And Materials Therefor (AREA)

Abstract

893,672. Making grid-electrodes; soldering. PLESSEY CO. Ltd. March 9, 1959 [March 17, 1958], No. 7360/58. Classes 83 (2) and 83 (4). In a method of making a grid - electrode, the grid-wire 2 is wound on supportrods 1 spaced by a mandrel 7 which is made from a material having a higher coefficient of thermal expansion than that of the wire 2 or heated to a higher temperature than the wire during brazing of the wire to the support-rods, so that the mandrel expands more than the wire. The wire may be of molybdenum coated, as by a printing process, with silver &c. brazing material on part of its circumference, and the mandrel of a cobalt-and-chromium alloy which forms an oxide layer when heated. The silver may be applied before or after winding the wire. The mandrel is thinner than the wire, which it supports in grooves 6, and is heated electrically to effect brazing, preferably in a neutral or reducing atmosphere. The heated mandrel expands the wire beyond its elastic limit.
GB7360/58A 1958-03-07 1958-03-07 Improvements in or relating to the manufacture of wire-wound grids for electron-discharge tubes Expired GB893672A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB7360/58A GB893672A (en) 1958-03-07 1958-03-07 Improvements in or relating to the manufacture of wire-wound grids for electron-discharge tubes
CH7045759A CH367571A (en) 1958-03-07 1959-03-06 Method for producing a control grid for electron discharge tubes and control grid produced according to the method
FR788559A FR1218270A (en) 1958-03-07 1959-03-06 Process for manufacturing grids for electron tubes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB7360/58A GB893672A (en) 1958-03-07 1958-03-07 Improvements in or relating to the manufacture of wire-wound grids for electron-discharge tubes

Publications (1)

Publication Number Publication Date
GB893672A true GB893672A (en) 1962-04-11

Family

ID=9831620

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7360/58A Expired GB893672A (en) 1958-03-07 1958-03-07 Improvements in or relating to the manufacture of wire-wound grids for electron-discharge tubes

Country Status (3)

Country Link
CH (1) CH367571A (en)
FR (1) FR1218270A (en)
GB (1) GB893672A (en)

Also Published As

Publication number Publication date
CH367571A (en) 1963-02-28
FR1218270A (en) 1960-05-10

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