GB974762A - Improvements in or relating to methods of making grids - Google Patents

Improvements in or relating to methods of making grids

Info

Publication number
GB974762A
GB974762A GB748260A GB748260A GB974762A GB 974762 A GB974762 A GB 974762A GB 748260 A GB748260 A GB 748260A GB 748260 A GB748260 A GB 748260A GB 974762 A GB974762 A GB 974762A
Authority
GB
United Kingdom
Prior art keywords
tape
tapes
curvature
former
pair
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
GB748260A
Inventor
George Charles Newton
Alfred George Seeley
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.)
EMI Ltd
Electrical and Musical Industries Ltd
Original Assignee
EMI Ltd
Electrical and Musical Industries 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 EMI Ltd, Electrical and Musical Industries Ltd filed Critical EMI Ltd
Priority to GB748260A priority Critical patent/GB974762A/en
Publication of GB974762A publication Critical patent/GB974762A/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

Landscapes

  • Exhaust Gas After Treatment (AREA)

Abstract

974,762. Making grids for discharge tubes; coiling; corrugating; brazing. ELECTRIC & MUSICAL INDUSTRIES Ltd. Feb. 24, 1961 [March 3, 1960], No. 7482/60. Headings B3A, B3E and B3R. [Also in Division H1] A grid for use in a discharge tube comprises a length of tape, the longitudinal edges of which are curved in the same sense in the plane of the tape, wound into a spiral with the major surfaces of the tape inclined to the axis of the spiral. As shown, a flat tape 1, Fig. 2, a corrugated tape 2 of annealed copper, 0.001 inch thick and 0.1 inch wide, are spirally wound on a partspherical former 3. The tapes may be silverplated so that after winding, the grid may be encircled by a support ring and brazed in an inert or reducing atmosphere. The longitudinal edges of the tapes 1, 2 should have a radius of curvature in the plane of the tape equal to the radius of curvature of the former 3, so that after winding the major surfaces of the tapes converge towards the centre of curvature of the former 3. The edges of the tapes may be curved by reducing the thickness of one edge relatively to the other edge by use of a table 5, Fig. 3, having a recessed edge 6 along which the tape is caused to lie by moving a flanged roller 7 around it as shown. Alternatively, a length of flat tape may be pressed between a pair of conical rollers 14, 15, Fig. 6, or between a pair of cylindrical rollers having their axes inclined to each other. The tape 2 may be formed by pressing it between a pair of intermeshing corrugated rollers 10, 11, Fig. 5, the axes of which are inclined to each other. Specification 964,262 is referred to.
GB748260A 1960-03-03 1960-03-03 Improvements in or relating to methods of making grids Expired GB974762A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB748260A GB974762A (en) 1960-03-03 1960-03-03 Improvements in or relating to methods of making grids

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB748260A GB974762A (en) 1960-03-03 1960-03-03 Improvements in or relating to methods of making grids

Publications (1)

Publication Number Publication Date
GB974762A true GB974762A (en) 1964-11-11

Family

ID=9833969

Family Applications (1)

Application Number Title Priority Date Filing Date
GB748260A Expired GB974762A (en) 1960-03-03 1960-03-03 Improvements in or relating to methods of making grids

Country Status (1)

Country Link
GB (1) GB974762A (en)

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