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US2547200A - Getter structure for electric discharge tubes - Google Patents

Getter structure for electric discharge tubes Download PDF

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Publication number
US2547200A
US2547200A US711636A US71163646A US2547200A US 2547200 A US2547200 A US 2547200A US 711636 A US711636 A US 711636A US 71163646 A US71163646 A US 71163646A US 2547200 A US2547200 A US 2547200A
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US
United States
Prior art keywords
cathode
getter
tubes
electric discharge
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
US711636A
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English (en)
Inventor
Dorgelo Eduard Gerardus
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.)
Hartford National Bank and Trust Co
Original Assignee
Hartford National Bank and Trust 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 Hartford National Bank and Trust Co filed Critical Hartford National Bank and Trust Co
Application granted granted Critical
Publication of US2547200A publication Critical patent/US2547200A/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J41/00—Discharge tubes for measuring pressure of introduced gas or for detecting presence of gas; Discharge tubes for evacuation by diffusion of ions
    • H01J41/12—Discharge tubes for evacuating by diffusion of ions, e.g. ion pumps, getter ion pumps
    • H01J41/14—Discharge tubes for evacuating by diffusion of ions, e.g. ion pumps, getter ion pumps with ionisation by means of thermionic cathodes
    • H01J41/16—Discharge tubes for evacuating by diffusion of ions, e.g. ion pumps, getter ion pumps with ionisation by means of thermionic cathodes using gettering substances
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
    • H01J1/02—Main electrodes
    • H01J1/13—Solid thermionic cathodes
    • H01J1/20—Cathodes heated indirectly by an electric current; Cathodes heated by electron or ion bombardment
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/84—Traps for removing or diverting unwanted particles, e.g. negative ions, fringing electrons; Arrangements for velocity or mass selection
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/94—Selection of substances for gas fillings; Means for obtaining or maintaining the desired pressure within the tube, e.g. by gettering
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J7/00—Details not provided for in the preceding groups and common to two or more basic types of discharge tubes or lamps
    • H01J7/14—Means for obtaining or maintaining the desired pressure within the vessel
    • H01J7/18—Means for absorbing or adsorbing gas, e.g. by gettering

Definitions

  • This invention relates to an electric discharge tube, in which the electrons emitted. by the cathode are formed into a beam by means of a suitable electrode system.
  • Such tubes in which the electrons are formed into a beam, may fulfil very different functions.
  • a very important specimen .of this kind of tube is the cathode-ray tube either comprising a luminescent screen or a number of collecting anodes.
  • the first-mentioned tubes are used for taking oscillogramsand for television purposes.
  • the last-mentioned group of tubes comprises inter alia deflection tubes which are used for amplification instead of normal gridamplification tubes.
  • Recently another kind of tube, in which use is made of electron streams formed into beams has become very important viz. tubes incorporating so-called cavity resonators. influence somehow electrical oscillations, more particularly high-frequency oscillations.
  • An electric discharge tube comprises an electrode system at least consisting of a cathode and means for forming into a beam the electrons emitted by this cathode, the cathode having an aperture through which the ions travelling in a direction opposite to that of the electrons in the beam, are capable of traversing the cathode without hitting the emitting surface, this tube beingcharacterized in that an ion getter is provided behind the aperture of the cathode.
  • the getter in gasfilled tubes requires to be such that only ions of detrimental gas moleculesare captured.
  • a very suitable ion getter is zirconium which is provided, for instance in the form of a plate or spiral, behind the cathode.
  • the temperature of the ion getter afiects to a certain extent its capacity of capturing ions.
  • the ion getter can be heated. This can take place either by means of a particular heating element or by a heat conducting junction of the getter to the cathode of the tube.
  • the ion getter and the cathode may form a structural assembly.
  • Another means for heating the getter to the required temperature consists in designing and proportiom'ng it in such manner that the ion bombardment yields the required heating.
  • Fig. 1 is a longitudinal sectional view of a discharge tube showing an ion getter of plate form
  • Fig. 2 is a similar view with an ion spiral form.
  • the reference numeral I denotes a circular heating helix for the annularly arranged emitting material 2.
  • the emitting material 2 is provided on a round casing 3 having a central aperture 4. Behind this aperture is provided a zirconium plate 5 which is secured to the casing 3 at 6.
  • the temperature of the plate 5 will" trode system comprising a cathode provided with i an emissive surface and means for forming into a beam the electrons emitted from said surface, said cathode having an aperture through which ions travelling in a direction opposite to that of the electrons in the beam are capable of traversing the cathode without striking the emissive surface, a rigid structural support for said cathode, and an ion getter member mounted rigidly on the support and disposed behind said aperture.
  • An electron discharge tube as set forth in claim 2, in which said ion getter member is constituted by a zirconium plate.
  • An electron discharge tube as set forth in claim 2, wherein said ion getter member is heated through conduction from said cathode.
  • An electron discharge tube as set forth in claim 2, wherein said ion getter member is thermally connected to said cathode structure.
  • An electron discharge tube having an electrode system comprising a cathode provided with an emissive surface and means for forming into a beam the electrons emitted from said surface, said cathode having an aperture through which ions travelling in a, direction opposite to that of the electrons in the beam are capable of traversing the cathode without striking the emissive sur face,a rigid structural support for said cathode,
  • an ion getter member mounted rigidly on the support and disposed behind said aperture, said member being constituted by a zirconium helix.
  • An electron discharge tube comprising at east a cathode element and an anode, with the cathode element embodying a heating element, an encircling shell, a cathodic surface on the shell with said surface and the shell being formed to have an aperture through which positive ions may pass without striking the cathodic surface, 7

Landscapes

  • Gas-Filled Discharge Tubes (AREA)
  • Electron Sources, Ion Sources (AREA)
  • Discharge Lamp (AREA)
US711636A 1945-09-15 1946-11-22 Getter structure for electric discharge tubes Expired - Lifetime US2547200A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL256336X 1945-09-15

Publications (1)

Publication Number Publication Date
US2547200A true US2547200A (en) 1951-04-03

Family

ID=19781323

Family Applications (1)

Application Number Title Priority Date Filing Date
US711636A Expired - Lifetime US2547200A (en) 1945-09-15 1946-11-22 Getter structure for electric discharge tubes

Country Status (7)

Country Link
US (1) US2547200A (es)
BE (1) BE469199A (es)
CH (1) CH256336A (es)
DE (1) DE812942C (es)
FR (1) FR936837A (es)
GB (1) GB616585A (es)
NL (1) NL67617C (es)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2656489A (en) * 1951-04-14 1953-10-20 Bell Telephone Labor Inc Electron discharge device and processing thereof
US2666159A (en) * 1951-08-08 1954-01-12 Gen Electric Sorption type getter structure
US2843777A (en) * 1954-01-28 1958-07-15 Rauland Corp Cathode-ray tubes
US2889478A (en) * 1953-07-02 1959-06-02 Int Standard Electric Corp Electron discharge apparatus
US2919380A (en) * 1957-07-23 1959-12-29 Philco Corp Electron discharge devices
US2956192A (en) * 1959-01-02 1960-10-11 Eitel Mccullough Inc Gettering electron gun
US3082346A (en) * 1960-05-19 1963-03-19 Gen Electric Resilient getter supporting arrangement
US3225910A (en) * 1961-02-04 1965-12-28 Porta Paolo Della Getter devices with non-evaporated gettering material, for maintaining vacuum in electronic tubes
US3250936A (en) * 1962-06-28 1966-05-10 Gen Electric Electron gun assembly with long life annular cathode curvilinear electron flow
US3293481A (en) * 1963-07-08 1966-12-20 Varian Associates High frequency electron discharge device
US3388275A (en) * 1966-06-08 1968-06-11 Battelle Development Corp Cathode provided with ion-producing material for decreasing space charge
US3495116A (en) * 1965-06-30 1970-02-10 Siemens Ag Pump arrangement with auxiliary cathode for electrical discharge vessels
US5223766A (en) * 1990-04-28 1993-06-29 Sony Corporation Image display device with cathode panel and gas absorbing getters

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1213062B (de) * 1959-12-05 1966-03-24 Deutsche Bundespost Verfahren zur Herstellung einer Flaechenoxyd-kathode fuer Elektronenstrahlroehren
DE1212227B (de) * 1961-12-13 1966-03-10 Deutsche Bundespost Flaechenkathode fuer Elektronenstrahlroehren

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1632080A (en) * 1921-12-27 1927-06-14 Western Electric Co Electric discharge device
GB297332A (en) * 1927-09-17 1929-08-29 Aeg Improvements in or relating to thermionic valves
US1859043A (en) * 1928-12-15 1932-05-17 Rca Corp Electric discharge tube
US1991279A (en) * 1930-10-31 1935-02-12 Philips Nv Gas filled discharge tube
US2038341A (en) * 1934-06-07 1936-04-21 Aeg Electron discharge device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1632080A (en) * 1921-12-27 1927-06-14 Western Electric Co Electric discharge device
GB297332A (en) * 1927-09-17 1929-08-29 Aeg Improvements in or relating to thermionic valves
US1859043A (en) * 1928-12-15 1932-05-17 Rca Corp Electric discharge tube
US1991279A (en) * 1930-10-31 1935-02-12 Philips Nv Gas filled discharge tube
US2038341A (en) * 1934-06-07 1936-04-21 Aeg Electron discharge device

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2656489A (en) * 1951-04-14 1953-10-20 Bell Telephone Labor Inc Electron discharge device and processing thereof
US2666159A (en) * 1951-08-08 1954-01-12 Gen Electric Sorption type getter structure
US2889478A (en) * 1953-07-02 1959-06-02 Int Standard Electric Corp Electron discharge apparatus
US2843777A (en) * 1954-01-28 1958-07-15 Rauland Corp Cathode-ray tubes
US2919380A (en) * 1957-07-23 1959-12-29 Philco Corp Electron discharge devices
US2956192A (en) * 1959-01-02 1960-10-11 Eitel Mccullough Inc Gettering electron gun
US3082346A (en) * 1960-05-19 1963-03-19 Gen Electric Resilient getter supporting arrangement
US3225910A (en) * 1961-02-04 1965-12-28 Porta Paolo Della Getter devices with non-evaporated gettering material, for maintaining vacuum in electronic tubes
US3250936A (en) * 1962-06-28 1966-05-10 Gen Electric Electron gun assembly with long life annular cathode curvilinear electron flow
US3293481A (en) * 1963-07-08 1966-12-20 Varian Associates High frequency electron discharge device
US3495116A (en) * 1965-06-30 1970-02-10 Siemens Ag Pump arrangement with auxiliary cathode for electrical discharge vessels
US3388275A (en) * 1966-06-08 1968-06-11 Battelle Development Corp Cathode provided with ion-producing material for decreasing space charge
US5223766A (en) * 1990-04-28 1993-06-29 Sony Corporation Image display device with cathode panel and gas absorbing getters

Also Published As

Publication number Publication date
GB616585A (en) 1949-01-24
BE469199A (es)
NL67617C (es)
FR936837A (fr) 1948-07-30
CH256336A (fr) 1948-08-15
DE812942C (de) 1951-09-06

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