GB773496A - Improvements in or relating to the formation of helical windings - Google Patents

Improvements in or relating to the formation of helical windings

Info

Publication number
GB773496A
GB773496A GB2748853A GB2748853A GB773496A GB 773496 A GB773496 A GB 773496A GB 2748853 A GB2748853 A GB 2748853A GB 2748853 A GB2748853 A GB 2748853A GB 773496 A GB773496 A GB 773496A
Authority
GB
United Kingdom
Prior art keywords
mandrel
wire
winding
electric current
moved
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
GB2748853A
Inventor
Sidney Haley Brooks
William Oscar Thorpe
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 GB2748853A priority Critical patent/GB773496A/en
Publication of GB773496A publication Critical patent/GB773496A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/02—Manufacture of electrodes or electrode systems
    • H01J9/08—Manufacture of heaters for indirectly-heated cathodes
    • H01J9/10—Machines therefor

Abstract

773,496. Making cathode heating elements; coiling. ELECTRIC & MUSICAL INDUSTRIES, Ltd. Oct. 6, 1954 [Oct. 7, 1953], No. 27488/53. Classes 83 (2) and 83 (4). Apparatus for winding under tension a metal filament having a double helical winding on an electrically insulating mandrel includes means for passing an electric current through said winding to heat it to its annealing temperature wherein said electric current is passed through said winding by making electrical contact with said filament at opposite ends of said mandrel. A ceramic mandrel 2 is rotated and moved axially to wind tungsten or molybdenum tungsten wire, guided by tensioning clamps 5, therearound in the form of a double helix. The ends of the wire are then clamped to a baseplate 1 to hold the wire under tension and a glass cover 9 moved over the mandrel to abut the base-plate 1. Nitrogen is then supplied to the enclosure 9 and an electric current is passed through the wire on the mandrel through the base-plate 1 and a probe 7, moved with the cover 9 to contact the end 3 of the mandrel, so that the wire is heated at, e.g., 800‹ C., for a few seconds. After removal from the mandrel 2 the coiled wire is provided with one or more coats of insulating material such as alumina.
GB2748853A 1953-10-07 1953-10-07 Improvements in or relating to the formation of helical windings Expired GB773496A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2748853A GB773496A (en) 1953-10-07 1953-10-07 Improvements in or relating to the formation of helical windings

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2748853A GB773496A (en) 1953-10-07 1953-10-07 Improvements in or relating to the formation of helical windings

Publications (1)

Publication Number Publication Date
GB773496A true GB773496A (en) 1957-04-24

Family

ID=10260406

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2748853A Expired GB773496A (en) 1953-10-07 1953-10-07 Improvements in or relating to the formation of helical windings

Country Status (1)

Country Link
GB (1) GB773496A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3004188A1 (en) * 1979-02-07 1980-08-14 Micropore International Ltd METHOD AND DEVICE FOR SHAPING A HEATING ELEMENT
EP0128239A2 (en) * 1983-04-28 1984-12-19 Älmhults Bruk Aktiebolag Process and apparatus for winding spiral elements from elastic, synthetic or metal threads

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3004188A1 (en) * 1979-02-07 1980-08-14 Micropore International Ltd METHOD AND DEVICE FOR SHAPING A HEATING ELEMENT
EP0128239A2 (en) * 1983-04-28 1984-12-19 Älmhults Bruk Aktiebolag Process and apparatus for winding spiral elements from elastic, synthetic or metal threads
EP0128239A3 (en) * 1983-04-28 1985-05-02 Roda Holding Anstalt Process and apparatus for winding spiral elements from elastic, synthetic or metal threads

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