US2154368A - Discharge tube and method of making same - Google Patents

Discharge tube and method of making same Download PDF

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Publication number
US2154368A
US2154368A US138022A US13802237A US2154368A US 2154368 A US2154368 A US 2154368A US 138022 A US138022 A US 138022A US 13802237 A US13802237 A US 13802237A US 2154368 A US2154368 A US 2154368A
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US
United States
Prior art keywords
vessels
metal
evacuated
members
tube
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 - Lifetime
Application number
US138022A
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English (en)
Inventor
Tuuk Jacob Harmannus Van Der
Verhoeff Adrianus
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
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Publication of US2154368A publication Critical patent/US2154368A/en
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Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J35/00—X-ray tubes
    • H01J35/02—Details
    • H01J35/16—Vessels; Containers; Shields associated therewith
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J5/00—Details relating to vessels or to leading-in conductors common to two or more basic types of discharge tubes or lamps
    • H01J5/02—Vessels; Containers; Shields associated therewith; Vacuum locks
    • H01J5/06—Vessels or containers specially adapted for operation at high tension, e.g. by improved potential distribution over surface of vessel

Definitions

  • the main object of our invention is to provide a method of making such tubes which eliminates the above difliculties.
  • Another object of our invention is to provide a tube having an interconnected vacuum space, but which comprises a plurality of vessels which have been individually evacuated and completed as sub-assemblies.
  • the vessels may be completed as units, and individually exhausted in i a simple manner, while at the same time the operation of the completed tube is not deleteriously affected by the presence of partitioning members in the discharge path.
  • Figure 1 is a sectional view of an X-ray tube according to the invention.
  • Fig. 2 is an enlarged View of the connecting portion of the tubes shown in Figs. 1 and 3,
  • Fig.r 3 is a sectional View of a discharge tube for generating cathode rays and embodying the invention
  • Fig. 4 is a sectional viewv of a connecting device according to another embodiment of the invention.
  • the X-ray tube shown in Figure 1 comprises two vessels or compartments l and 2 of somewhat similar construction.
  • Vessel l has an envelope comprising a vitreous re-entrant portion 26 hermetically sealed at 36 to a cup-shaped metal portion 24 provided on its closed end with a window 32 for the exit of the X-rays, .and forming a tubular protuberance 9, later to be described.
  • Supported by re-entrant portion 2B and hermetically sealed thereto is an anode structure 3 having an inclined target 33 of tungsten. Current is supplied to the anode by a hightension cable 'l' extending into the hollow of re-entrant portion 26.
  • a bushing 5 of molded insulating material or of rubber Surrounding the end portion of cable 'l and extending into the space formed between this portion and the re-entrant portion 2B is .a bushing 5 of molded insulating material or of rubber. To prevent the occurrence of air spaces between bushing 5 and the surface of re-entrant portion 26, a layer of insulating material 28, for instance a coagulated insulating material applied in a plastic constitution, is provided.
  • a metal shaft 4l encloses a conical portion 42 of the bushing 5 and is secured to the metal portion 24 by means of a screw cap 43. It connects the metal portion 24 electrically with a exible metal coating 44 spun round the cable, which may be grounded :during the operation of the tube.
  • the current conductor 45, secured to the projecting portion 45 of the anode is led through a hollow flexible conductive tubing 4l to which it is electrically connected, as shown schematically at 48.
  • Vessel 2 which as stated is similar in construction to vessel l, has an envelope comprising a vitreous reentrant portion 2l hermetically sealed at 31 to a cupshaped metal portion 25 provided with a tubular protuberance l0. Carried by reentrant portion 2l and hermetically sealed therev to is a cathode structure 4 comprising an incandescible cathode 5I. Ihe high voltage is .applied to cathode 5I by a high-tension supply cable 8 extending into the hollow of re-entrant portion 21. An insulating bushing 6 and layer of insulating material 29, similar to that described in connection with Vessel l, are also provided.
  • filament 5I cable 3 For the supply of heating current to filament 5I cable 3 comprises two current conductors 49 and 56.
  • Conductor 56 is hermetically sealed in a little glass disc 52 and kept insulated from the metal structure 4.
  • Conductor 49 is secured to structure 4 at 53.
  • the filament 5I is connected between conductor 56 and structure 4.
  • Conductors 49 and 59 are insulated from each other for the low tension necessary for energizing the cathode and together enclosed in a flexible conductive tubing 54, to which conductor 49 is electrically connected as shown schematically at 55.
  • a metal shaft 56 encloses a conical portion 51 of the insulating bushing 6 and is secured to the metal portion 25 by means of a screw cap 58. It connects the metal portion 25 electrically with a flexible metal coating 59 spun round the cable, which as coating 44 may be grounded during the operation of the tube.
  • protuberances 9 and I6 are hermetically closed by means of thin metal.
  • members II and I2 respectively (see Fig. 2), which members may be of constantan and have a thickness of about 50 microns.
  • the vessels are then individually evacuated to the proper degree. In other words, the vessels are constructed as subassemblies and individually evacuated.
  • protuberance 9 has a reduced end portion 6I) snugly fitting into a counterbcre 6I of protuberance I0.
  • the end of portion 66 is diametrically grooved, and a vent hole I3 is provided in protuberance I6.
  • the members II and I2 of Figs. 1 to 3 may be perforated by mechanical means such as illustrated in Figure 4.
  • the perforating-connecting device shown in the latter figure comprises two ⁇ tubular members 35 and 3S, which may be considered as forming parts of two Vessels, i. e. similar to the protuberances 9 and II) of Fig. l.
  • Hermetically secured with one end tothe flanged end of member 35 is a bellows I5, for instance of copper plate, whose other end is hermetically secured to a tubular anged member I6.
  • the ends of members It and 38 are closed by metal discs II and I 2, whereas these members are joined together and the groove I4 and vent hole I3 closed in the manner described in connection with the protuberances 9 and VIEB of Figs. l and 2.
  • surrounds bellows I5 and has one end 'cooperating with threads on member I6 whereby rotation of cap 2
  • Mandrel I'I Slidable within the bore of member I5 and having a flanged end pressed against member 35 by a compression spring I9, is a tubular perforating mandrel I'I.
  • Mandrel I'I is Vprovided on its right-hand end with a cutting or perforating edge 20 tapering inwardly from a point 30 at an angle a of about 12 degrees.
  • the lower part oi edge 20 is rounded at 23, whereas the bottom of mandrel I1 is provided with a groove 3
  • a method of makin-g an electric discharge tube comprising the steps, forming a plurality of evacuated vessels each having a fragile wall portion, arranging said'vessels adjacent each other with the wall portions of adjacent vessels in contact with each other, hermetically connecting the envelopes of adjacent vessels to form a common hermetically-tight envelope, and perforating the wall portions to connect the evacuated spaces of the vessels.
  • An electric discharge tube comprising a plurality of individually-evacuated vessels each havf ing at least one thin metal envelope portion, said vessels being hermetically sealed together to form a single sealed envelope with said metal portions dividing the evacuated spaces of adjacent vessels, and means to mechanically perforate said metal portions comprising a compressible member forming a part of the envelope of the tube, a perforating member movable upon compression of said compressible member, and means to compress said member.
  • An electric discharge tube comprising a plurality of individually-evacuated vessels having thin metal envelope portions, said vessels having their envelopes hermetically sealed together to form a single envelope with said metal portions dividing the evacuated space of adjacent vessels, and means to mechanically perforate said metal portions comprising a compressible member forming a part of the envelope of the tube, a tubular perforating member movable upon compression of said compressible member, and means to compress said member, said perforating member being provided with a groove and having an inclined cutting edge rounded near said groove, said groove serving to receive the strips cut from said metal portions.
  • a method of making an electric discharge tube from a plurality of evacuated vessels each having a tubular metal wall portion whose end is closedby a metal foil comprising the steps, arranging the vessels adjacent each other with the foils of adjacent wall portions in contact with yeach other, hermetically connecting the metal wall portions together to form a single hemetically sealed envelope enclosing an evacuated space separated by said foils, and perforating the foils by electron bombardment to connect the evacuated spaces of the vessels.
  • a method of making an electric discharge tube from a plurality of evacuated vessels each having a tubular metal wall portion whose end is closed by a metal foil comprising the steps, arranging the vessels adjacent each other with the foils of adjacent wall portions in contact with each other, hermetically connecting the metal wall portions together to form a single hermetically-sealed envelope enclosing an evacuated space separated by said foils, and mechanically perforating the foils to connect the evacuated spaces of the vessels.
  • a method of making an electric discharge tube from a plurality of evacuated vessels each having a tubular wall portion whose end is closed by a fragile metal member comprising the steps, arranging the vessels adjacent each other with the members of adjacent vessels in contact with each other, hermetically connecting the metal wall portions together to form a single hermetically-sealed envelope enclosing an evacuated space separated by said members, perforating the members to connect the evacuated spaces of the vessels, and volatilizing a getter within the evacuated space to absorb any gases introduced into the space by the perforation of said members.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
  • X-Ray Techniques (AREA)
US138022A 1936-04-23 1937-04-20 Discharge tube and method of making same Expired - Lifetime US2154368A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE478926X 1936-04-23

Publications (1)

Publication Number Publication Date
US2154368A true US2154368A (en) 1939-04-11

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ID=6542334

Family Applications (1)

Application Number Title Priority Date Filing Date
US138022A Expired - Lifetime US2154368A (en) 1936-04-23 1937-04-20 Discharge tube and method of making same

Country Status (4)

Country Link
US (1) US2154368A (enrdf_load_stackoverflow)
FR (1) FR820888A (enrdf_load_stackoverflow)
GB (1) GB478926A (enrdf_load_stackoverflow)
NL (1) NL50259C (enrdf_load_stackoverflow)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2559136A (en) * 1945-02-23 1951-07-03 Jarnhs Elek Ska Aktiebolag Rontgen tube
DE925510C (de) * 1951-10-02 1955-03-24 Jan Derksen-Staats Anhaenger fuer Kraftfahrzeuge, insbesondere Wohnanhaenger
US2751514A (en) * 1952-04-15 1956-06-19 Dunlee Corp Hooded anode X-ray tube
US3183391A (en) * 1960-12-16 1965-05-11 Rca Corp Shielding of electron gun from vaporized getter by decomposable foil over electrode aperture
US4094563A (en) * 1967-08-09 1978-06-13 Westinghouse Electric Corp. Method of fabricating an electron tube
US4175808A (en) * 1966-01-03 1979-11-27 Ni-Tec, Inc. Method and apparatus for producing electronic devices
US4186980A (en) * 1966-01-03 1980-02-05 Ni-Tec, Inc. Method and apparatus for constructing electronic devices

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2559136A (en) * 1945-02-23 1951-07-03 Jarnhs Elek Ska Aktiebolag Rontgen tube
DE925510C (de) * 1951-10-02 1955-03-24 Jan Derksen-Staats Anhaenger fuer Kraftfahrzeuge, insbesondere Wohnanhaenger
US2751514A (en) * 1952-04-15 1956-06-19 Dunlee Corp Hooded anode X-ray tube
US3183391A (en) * 1960-12-16 1965-05-11 Rca Corp Shielding of electron gun from vaporized getter by decomposable foil over electrode aperture
US4175808A (en) * 1966-01-03 1979-11-27 Ni-Tec, Inc. Method and apparatus for producing electronic devices
US4186980A (en) * 1966-01-03 1980-02-05 Ni-Tec, Inc. Method and apparatus for constructing electronic devices
US4094563A (en) * 1967-08-09 1978-06-13 Westinghouse Electric Corp. Method of fabricating an electron tube

Also Published As

Publication number Publication date
NL50259C (enrdf_load_stackoverflow)
FR820888A (fr) 1937-11-20
GB478926A (en) 1938-01-27

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