GB987380A - Improvements in or relating to electron beam furnaces - Google Patents

Improvements in or relating to electron beam furnaces

Info

Publication number
GB987380A
GB987380A GB27055/63A GB2705563A GB987380A GB 987380 A GB987380 A GB 987380A GB 27055/63 A GB27055/63 A GB 27055/63A GB 2705563 A GB2705563 A GB 2705563A GB 987380 A GB987380 A GB 987380A
Authority
GB
United Kingdom
Prior art keywords
path
transformer
rectifier
july
supplying
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
GB27055/63A
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.)
Stauffer Chemical Co
Original Assignee
Stauffer Chemical Co
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 Stauffer Chemical Co filed Critical Stauffer Chemical Co
Publication of GB987380A publication Critical patent/GB987380A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
    • H01J37/02—Details
    • H01J37/24—Circuit arrangements not adapted to a particular application of the tube and not otherwise provided for
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
    • H01J37/30—Electron-beam or ion-beam tubes for localised treatment of objects
    • H01J37/305—Electron-beam or ion-beam tubes for localised treatment of objects for casting, melting, evaporating or etching

Abstract

987,380. Automatic position control. STAUFFER CHEMICAL CO. July 9, 1963 [July 9, 1962], No. 27055/63. Heading G3R. [Also in Division H1] A circuit for automatically keeping constant the path of the beam in an electron beam melting furnace includes a variable transformer 56, a transformer 58 and a rectifier 32 for supplying a direct current to the electromagnet 16 directing the beam path, the direct current varying with the beam voltage. The changes in beam voltage are due to changes in the impedance of the beam path due to ions produced in the path of the beam. The electron gun 14 is energized by a constant current network 42 via step-up transformer 48 and rectifier 50, variable transformer 24 supplying the cathode filament current.
GB27055/63A 1962-07-09 1963-07-09 Improvements in or relating to electron beam furnaces Expired GB987380A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US208504A US3204096A (en) 1962-07-09 1962-07-09 Apparatus for projecting an electron beam along a curved path having variable impedance

Publications (1)

Publication Number Publication Date
GB987380A true GB987380A (en) 1965-03-31

Family

ID=22774831

Family Applications (1)

Application Number Title Priority Date Filing Date
GB27055/63A Expired GB987380A (en) 1962-07-09 1963-07-09 Improvements in or relating to electron beam furnaces

Country Status (4)

Country Link
US (1) US3204096A (en)
BE (1) BE634652A (en)
FR (1) FR1362376A (en)
GB (1) GB987380A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3420977A (en) * 1965-06-18 1969-01-07 Air Reduction Electron beam apparatus
US5216690A (en) * 1992-03-11 1993-06-01 Hanks Charles W Electron beam gun with grounded shield to prevent arc down
US6476340B1 (en) 1999-04-14 2002-11-05 The Boc Group, Inc. Electron beam gun with grounded shield to prevent arc-down and gas bleed to protect the filament

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3087211A (en) * 1960-05-27 1963-04-30 Stauffer Chemical Co Electron-beam furnace with opposedfield magnetic beam guidance
US3068309A (en) * 1960-06-22 1962-12-11 Stauffer Chemical Co Electron beam furnace with multiple field guidance of electrons

Also Published As

Publication number Publication date
FR1362376A (en) 1964-05-29
US3204096A (en) 1965-08-31
BE634652A (en)

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