GB195610A - Improvements in heating elements for electric rotating resistance furnaces for treating zinc powder - Google Patents

Improvements in heating elements for electric rotating resistance furnaces for treating zinc powder

Info

Publication number
GB195610A
GB195610A GB7258/23A GB725823A GB195610A GB 195610 A GB195610 A GB 195610A GB 7258/23 A GB7258/23 A GB 7258/23A GB 725823 A GB725823 A GB 725823A GB 195610 A GB195610 A GB 195610A
Authority
GB
United Kingdom
Prior art keywords
resistance
zinc powder
heating elements
furnace
class
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
GB7258/23A
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.)
Finspongs Metallverks AB
Original Assignee
Finspongs Metallverks 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 Finspongs Metallverks AB filed Critical Finspongs Metallverks AB
Publication of GB195610A publication Critical patent/GB195610A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H05B3/00—Ohmic-resistance heating
    • H05B3/62—Heating elements specially adapted for furnaces

Landscapes

  • Manufacture And Refinement Of Metals (AREA)

Abstract

195,610. Finspongs Metallverks Aktiebolag. March 29, 1922, [Convention date]. Resistances, self-supporting.-Rotating electric furnaces for treating zinc powder are provided with rod-shaped heating elements so constructed that the resistance of those portions A, C of the element to which the current is supplied is different from the resistance of the part B of the element situated within the furnace. Preferably the resistance of the part inside the furnace is at least two-thirds of the total resistance. Figs. 1, 3, and 4 show different constructions of elements, the desired result being obtained by variations in the cross-sectional area. In a modification, an element of uniform external diameter is made hollow over the part B. In another modification, an element of uniform cross-sectional area has the part B made of material different from that used for the parts A., C. The part B may be made from carbon powder leaving a relatively great amount of ashes and the parts A, C may be made from pure carbon materials such as graphite, retort graphite and petroleum coke. Reference has been directed by the Comptroller to Specifications 9017/87, 24909/03, [both in Class 39, Electric lamps &c.], 29715/10, 6952/13, 16299/13, and 168,018, [all in Class 39 (iii), Heating by electricity].
GB7258/23A 1922-03-29 1923-03-13 Improvements in heating elements for electric rotating resistance furnaces for treating zinc powder Expired GB195610A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE195610X 1922-03-29

Publications (1)

Publication Number Publication Date
GB195610A true GB195610A (en) 1924-07-14

Family

ID=20304757

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7258/23A Expired GB195610A (en) 1922-03-29 1923-03-13 Improvements in heating elements for electric rotating resistance furnaces for treating zinc powder

Country Status (1)

Country Link
GB (1) GB195610A (en)

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