GB1285560A - Improvements in or relating to electron beam welding apparatus - Google Patents

Improvements in or relating to electron beam welding apparatus

Info

Publication number
GB1285560A
GB1285560A GB4878168A GB4878168A GB1285560A GB 1285560 A GB1285560 A GB 1285560A GB 4878168 A GB4878168 A GB 4878168A GB 4878168 A GB4878168 A GB 4878168A GB 1285560 A GB1285560 A GB 1285560A
Authority
GB
United Kingdom
Prior art keywords
circuit
thyristor
current
voltage
control loop
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
GB4878168A
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.)
RICHARD ERNEST TRILLWOOD
WENTGATE ENGINEERS Ltd
Original Assignee
RICHARD ERNEST TRILLWOOD
WENTGATE ENGINEERS 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 RICHARD ERNEST TRILLWOOD, WENTGATE ENGINEERS Ltd filed Critical RICHARD ERNEST TRILLWOOD
Priority to GB4878168A priority Critical patent/GB1285560A/en
Publication of GB1285560A publication Critical patent/GB1285560A/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
    • H01J37/241—High voltage power supply or regulation circuits
    • 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
    • H01J37/04—Arrangements of electrodes and associated parts for generating or controlling the discharge, e.g. electron-optical arrangement, ion-optical arrangement
    • H01J37/06—Electron sources; Electron guns
    • H01J37/063—Geometrical arrangement of electrodes for beam-forming

Abstract

1285560 Automatic voltage and current control WENTGATE ENG Ltd and R E TRILLWOOD 8 Oct 1969 [15 Oct 1968] 48781/68 Heading G3R [Also in Division H1] Electron beam welding apparatus comprises a filament 11 producing an electron beam directed through a magnetic lens 15 on to a workpiece 16, the voltage applied between members 11, 16 being maintained at a desired valve by a control loop which varies the firing angle of a thyristor 31 in series with the primary winding of a high voltage transformer 25. The control loop comprises an amplifier 27 receiving an error signal derived from comparison of a signal from voltage divider 22 with a reference signal 26, a bi-stable trigger circuit 28 receiving the amplifier output and a ramp waveform produced by a circuit 29, and a differentiator 30 producing the firing pulses for the thyristor 31. Stabilization of the beam current is provided by a control loop comprising current sensing resistor 33, reference circuit 34, amplifier 35, bi-stable trigger circuit 36, differentiator 37 and a thyristor or Triac 38 controlling the power supply 39 for a bias electrode 12. Sensing resistor 33 also controls an overload cutout 40 which switches off the thyristor 31 if the beam current becomes excessive. A programme circuit 41 determines the rate of increase and decrease of beam current and the duration of the welding current. Filament 11 is supplied by a circuit comprising an A. C. voltage stabilizer 21 and an auto-transformer 20 feeding A. C. to the supply 18. Various operating conditions of the apparatus are discussed.
GB4878168A 1968-10-15 1968-10-15 Improvements in or relating to electron beam welding apparatus Expired GB1285560A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4878168A GB1285560A (en) 1968-10-15 1968-10-15 Improvements in or relating to electron beam welding apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4878168A GB1285560A (en) 1968-10-15 1968-10-15 Improvements in or relating to electron beam welding apparatus

Publications (1)

Publication Number Publication Date
GB1285560A true GB1285560A (en) 1972-08-16

Family

ID=10449889

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4878168A Expired GB1285560A (en) 1968-10-15 1968-10-15 Improvements in or relating to electron beam welding apparatus

Country Status (1)

Country Link
GB (1) GB1285560A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4309589A (en) * 1978-07-25 1982-01-05 National Research Institute For Metals Method and apparatus for electron beam welding
DE3042652A1 (en) * 1980-06-19 1982-02-04 Institut elektrosvarki imeni E.O. Patona Akademii Nauk Ukrainskaja SSR, Kiev METHOD FOR ELECTRON BEAM WELDING AND DEVICE FOR CARRYING OUT THE SAME

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4309589A (en) * 1978-07-25 1982-01-05 National Research Institute For Metals Method and apparatus for electron beam welding
DE3042652A1 (en) * 1980-06-19 1982-02-04 Institut elektrosvarki imeni E.O. Patona Akademii Nauk Ukrainskaja SSR, Kiev METHOD FOR ELECTRON BEAM WELDING AND DEVICE FOR CARRYING OUT THE SAME

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees