US3612942A - Emitting assembly of an electronic bombardment gun - Google Patents

Emitting assembly of an electronic bombardment gun Download PDF

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Publication number
US3612942A
US3612942A US880715A US3612942DA US3612942A US 3612942 A US3612942 A US 3612942A US 880715 A US880715 A US 880715A US 3612942D A US3612942D A US 3612942DA US 3612942 A US3612942 A US 3612942A
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United States
Prior art keywords
emitting assembly
filament
washer
electrode
emitting
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Expired - Lifetime
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US880715A
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English (en)
Inventor
Jean-Pierre Peyrot
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Individual
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Individual
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    • 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 or ion-optical arrangement
    • H01J37/06—Electron sources; Electron guns
    • 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 or ion-optical arrangement
    • H01J37/06—Electron sources; Electron guns
    • H01J37/065—Construction of guns or parts thereof

Definitions

  • the present invention relates to an electronic welding gun and, more particularly, to a bombardment gun of the directheating type with an annular throttled cathode.
  • the invention has for its main object a filament which combines the advantages of direct heating guns and indirect heating guns.
  • the filament is of the type having coaxial conductors, which provides easy handling and accurate adjustment in position together with rapid assembly and dismantling;
  • the invention retains the advantages of direct heating, namely:
  • this filament can be readily changed at a distance by remote control, for example,
  • the invention is particularly directed to certain methods of application especially of electronic bombardment guns intended for welding, and also to certain methods of construction, and it is still more particularly directed, by way of new industrial products, to direct-heating electronic bombardment guns comprising the application of the same arrangements, their special elements, together with the electronic bombardment guns which comprise similar elements.
  • FIG. 1 is a view of a conventional filament of metal foil cutout and folded to shape
  • FIG. 2 is a view of a conventional filament of metal foil, cutout, shaped and punched;
  • FIG. 3 is a view of a conventional filament of coiled wire
  • FIG. 4 is a view of a conventional filament of wire wound in a spiral
  • FIG. 5 is a diagram of the mounting of a foil filament in a conventional direct-heating gun
  • FIG. 6 is a diagram of the mounting of a wire filament in a conventional direct-heating gun
  • FIG. 7 is a basic diagram of the mounting of a conventional indirect-heating filament and its emitting cathode
  • FIG. 8 is a perspective view of a coaxial filament according to the invention.
  • FIG. 9 is an exploded view of the coaxial filament shown in FIG. 8.
  • FIG. 10 is a half-sectional view of the coaxial filament of FIG. 8;
  • FIG. 11 is a view in cross section of the mounting of a coaxial filament of FIG. 10, in a gun of the PIERCE type;
  • FIG. 12 is a view in cross section of an alternative form.
  • FIG. 8 a metallic filament body 10 of tantalum, tungsten, tungsten/rhenium or other metal, of conical form and comprising at its lower portion an annular surface 11, having a thickness of 0.05 mm. for example and of slightly domed shape, pierced at its center with a hole of 0.4 mm. in diameter.
  • This cone is pierced on its periphery with a number of openings 14 permitting evacuation of air so as to obtain the vacuum necessary for the bombardment.
  • This dished portion gives a high degree of elasticity to the washer 23, which behaves like a flexible diaphragm and thus enables all thermal fatigue due to differences of expansion to be avoided.
  • the punched out form of the washer 23 permits the expansion of the central electrode 16 without adverse effect.
  • a weld is effected by electronic bombardment at 27 and in the direction of the arrow f2, in order to bind together intimately the parts 10 and 16.
  • the spacer 19 is placed on the flange 15 and its conical bearing surface 39 is centered in the cone I3 of the filament body 10.
  • the goffered metal washer 23 is placed on the spacer 19 and is centered in the dished portion 22 of this spacer. On other hand during this operation, the cylinder 17 of the central electrode 16 is centered with a close fit in the hole 26 of the washer 23.
  • a weld by electron bombardment will effected at 29 in the direction of fl so as to bind together the washer 23 and the central electrode 16 in an intimate manner.
  • the compact assembly thus formed is a coaxial filament for a direct-heating gun, for which it enables its own advantages already recited to be combined with those of conventional indirect-heating guns.
  • FIG. 11 illustrates very clearly the simplicity of the inputs of high-voltage current pole pieces 31 and 32, together with the simplicity of mounting or removal of the filament 10.
  • the metallic parts 31 and 32 insulated from each other by an insulating member 33, constitute the inputs of the high-voltage current.
  • a hole 34 to permit the passage of the filament.
  • a spotface or blind orifice 35 in which the filament comes to rest and is centered.
  • a threaded hole 36 in which is screwed a metal nut 37. By tightening this nut, the parts l0, l9 and 23 are compressed against each other.
  • a conical perforated filament having a flange at its widest portion and an emitting annular end portion pierced with an orifice at its narrowest portion
  • the emitting assembly as claimed in claim 1, comprising an electrode made of tantalum.
  • the emitting assembly as claimed in claim 1, comprising a electrode made of tungsten/rhenium.
  • the emitting assembly as claimed in claim 1, comprising a washer made of tantalum.
  • the emitting assembly as claimed in claim 1, comprising a washer made of tungsten/rhenium.

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  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Electron Sources, Ion Sources (AREA)
  • Solid Thermionic Cathode (AREA)
  • Particle Accelerators (AREA)
  • Microwave Tubes (AREA)
US880715A 1968-11-29 1969-11-28 Emitting assembly of an electronic bombardment gun Expired - Lifetime US3612942A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR176086 1968-11-29

Publications (1)

Publication Number Publication Date
US3612942A true US3612942A (en) 1971-10-12

Family

ID=8657662

Family Applications (1)

Application Number Title Priority Date Filing Date
US880715A Expired - Lifetime US3612942A (en) 1968-11-29 1969-11-28 Emitting assembly of an electronic bombardment gun

Country Status (6)

Country Link
US (1) US3612942A (cs)
JP (1) JPS4912824B1 (cs)
CH (1) CH510484A (cs)
DE (1) DE1959950A1 (cs)
FR (1) FR1599106A (cs)
GB (1) GB1256379A (cs)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4598226A (en) * 1984-12-17 1986-07-01 Clegg John E Concave conical foil-filament lamp
WO1999016101A3 (en) * 1997-09-24 1999-06-17 Welding Inst Charged particle beam emitting assembly
RU2156516C2 (ru) * 1995-06-21 2000-09-20 Самсунг Дисплей Дивайсиз Ко., Лтд. Держатель катода электронного прожектора для электронно-лучевых трубок

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2214705A (en) * 1988-01-26 1989-09-06 English Electric Valve Co Ltd Directly heated cathode

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1980447A (en) * 1931-04-14 1934-11-13 Lincoln Electric Co Arc welding apparatus

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1980447A (en) * 1931-04-14 1934-11-13 Lincoln Electric Co Arc welding apparatus

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4598226A (en) * 1984-12-17 1986-07-01 Clegg John E Concave conical foil-filament lamp
RU2156516C2 (ru) * 1995-06-21 2000-09-20 Самсунг Дисплей Дивайсиз Ко., Лтд. Держатель катода электронного прожектора для электронно-лучевых трубок
WO1999016101A3 (en) * 1997-09-24 1999-06-17 Welding Inst Charged particle beam emitting assembly
US6404115B1 (en) 1997-09-24 2002-06-11 The Welding Institute Particle beam emitting assembly
RU2201006C2 (ru) * 1997-09-24 2003-03-20 Дзе Велдинг Инститьют Устройство для излучения заряженных частиц, излучатель заряженных частиц, сварочный аппарат, узел для прохождения заряженных частиц, устройство для получения пучка заряженных частиц
EP1587129A1 (en) * 1997-09-24 2005-10-19 The Welding Institute Improvements relating to charged particle beams

Also Published As

Publication number Publication date
GB1256379A (en) 1971-12-08
CH510484A (fr) 1971-07-31
DE1959950A1 (de) 1970-06-25
FR1599106A (cs) 1970-07-15
JPS4912824B1 (cs) 1974-03-27

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