GB846379A - Improvements in electrical vacuum furnaces - Google Patents

Improvements in electrical vacuum furnaces

Info

Publication number
GB846379A
GB846379A GB36158/58A GB3615858A GB846379A GB 846379 A GB846379 A GB 846379A GB 36158/58 A GB36158/58 A GB 36158/58A GB 3615858 A GB3615858 A GB 3615858A GB 846379 A GB846379 A GB 846379A
Authority
GB
United Kingdom
Prior art keywords
shield
strip
insulating material
foil
parts
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
GB36158/58A
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.)
ABB Norden Holding AB
Original Assignee
ASEA AB
Allmanna Svenska Elektriska AB
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 ASEA AB, Allmanna Svenska Elektriska AB filed Critical ASEA AB
Publication of GB846379A publication Critical patent/GB846379A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
    • F27B5/04—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated adapted for treating the charge in vacuum or special atmosphere
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/22—Furnaces without an endless core
    • H05B6/24—Crucible furnaces
    • H05B6/26—Crucible furnaces using vacuum or particular gas atmosphere

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Regulation Of General Use Transformers (AREA)

Abstract

846,379. Induction vacuum furnaces. ALLMANNA SVENSKA ELEKTRISKA A. B. Nov. 11, 1958 [Nov. 19, 1957], No. 361,58/58. Class 39(3). Corona which occurs at the live parts of an electric vacuum furnace is reduced by electrically shielding these parts. An induction coil of a furnace comprises a tubular copper conductor 5 surrounded by an electrically insulating material 6 which is itself surrounded by a conductive shield 7 connected to earth. The shield is divided into sections by gaps which are covered by layers of insulating material partly covered by metal strips 10 preferably so that one edge of the strip is in contact with the underlying section of the shield and the other edge of the strip is insulated from the shield. The shield may alternatively be formed from a. strip of insulating material provided on one side with a conductive layer, e.g. metal foil, the strip being wound on the parts to be protected and being wider than the foil so that adjacent turns of the foil do not come into contact with each other. The conductive shield material is suitably non-magnetic.
GB36158/58A 1957-11-19 1958-11-11 Improvements in electrical vacuum furnaces Expired GB846379A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE846379X 1957-11-19

Publications (1)

Publication Number Publication Date
GB846379A true GB846379A (en) 1960-08-31

Family

ID=20358511

Family Applications (1)

Application Number Title Priority Date Filing Date
GB36158/58A Expired GB846379A (en) 1957-11-19 1958-11-11 Improvements in electrical vacuum furnaces

Country Status (1)

Country Link
GB (1) GB846379A (en)

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