US3737709A - Gas discharge tube comprising mercury vapor and provided with a getter - Google Patents

Gas discharge tube comprising mercury vapor and provided with a getter Download PDF

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Publication number
US3737709A
US3737709A US00194989A US3737709DA US3737709A US 3737709 A US3737709 A US 3737709A US 00194989 A US00194989 A US 00194989A US 3737709D A US3737709D A US 3737709DA US 3737709 A US3737709 A US 3737709A
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US
United States
Prior art keywords
getter
discharge tube
gas discharge
mercury vapor
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
US00194989A
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English (en)
Inventor
J Hornman
Esdonk J Van
J Visser
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.)
US Philips Corp
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US Philips Corp
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 US Philips Corp filed Critical US Philips Corp
Application granted granted Critical
Publication of US3737709A publication Critical patent/US3737709A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J17/00—Gas-filled discharge tubes with solid cathode
    • H01J17/02—Details
    • H01J17/22—Means for obtaining or maintaining the desired pressure within the tube
    • H01J17/24—Means for absorbing or adsorbing gas, e.g. by gettering
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/24—Means for obtaining or maintaining the desired pressure within the vessel
    • H01J61/26—Means for absorbing or adsorbing gas, e.g. by gettering; Means for preventing blackening of the envelope
    • 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
    • H01J7/186—Getter supports

Definitions

  • the invention relates to a gas discharge tube comprising mercury vapor and provided with a getter which is operative at room temperature.
  • German Pat. specification No. 1,234,866 and German Auslegeschrift No. 1,514,658 to provide gas discharge tubes comprising mercury vapor with a getter which is maintained at a comparatively high temperature during operation of the tube.
  • the getter material is provided for that purpose as a layer on the anode or on a screen grid.
  • US. Pat. specification No. 2,747,124 to heat a getter body by means of a filament.
  • a getter material which is operative at room temperature is separated in known manner from the surrounding space by one or more porous sintered bodies.
  • Porous, sintered tungsten bodies as they are used in supply-cathodes are very suitable. It has been found that the pores are permeable to the undesirable gases present in the tube but that the memory atoms are substantially not permitted to pass.
  • FIG. 1 is a perspective sectional view of a holder with a getter according to the invention
  • FIG. 2 shows a gas discharge tube provided with such a getter.
  • reference numeral 1 denotes a getterholder consisting of a metal ring which is flanged so that the gettermaterial 2 and the porous bodies 3 which consist of sintered tungsten are held tight.
  • the gettermaterial 2 which may consist, for example, of zirconium hydride or of a mixture of zirconium, aluminium, tungsten and nickel, is separated from the surrounding space by the porous bodies 3.
  • FIG. 2 shows a digit tube having a glass envelope 4, electrodes 5 in the form of digits and a holder 6 having a readily decomposable mercury compound.
  • the getterholder l is present at the bottom of the envelope 4.
  • the holder 6 and the getterholder 1 can be heated, for example, by means of the passage of current or high frequency currents for releasing mercury vapor and for activating the getter, respectively. Afterwards, however, heating of the getter need no longer take place.
  • the getter absorbs substantially no mercury vapor, the quantity of mercury vapor in the tube remains constant. It is found that the gettering effect for gases such as carbon monoxide, oxygen and carbonic acid is substantially entirely maintained also without heating the getterholder 1.
  • a gas discharge tube having a mercury vaporcontaining gas atmosphere the improvement being a non-evaporating getter having a-gettermaterial which is operative at room temperature and which is separated in a predetermined manner from the surrounding space by one or more porous sintered metal bodies.

Landscapes

  • Discharge Lamp (AREA)
  • Common Detailed Techniques For Electron Tubes Or Discharge Tubes (AREA)
  • Gas-Filled Discharge Tubes (AREA)
US00194989A 1970-11-14 1971-11-02 Gas discharge tube comprising mercury vapor and provided with a getter Expired - Lifetime US3737709A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7016726A NL7016726A (enrdf_load_stackoverflow) 1970-11-14 1970-11-14

Publications (1)

Publication Number Publication Date
US3737709A true US3737709A (en) 1973-06-05

Family

ID=19811568

Family Applications (1)

Application Number Title Priority Date Filing Date
US00194989A Expired - Lifetime US3737709A (en) 1970-11-14 1971-11-02 Gas discharge tube comprising mercury vapor and provided with a getter

Country Status (6)

Country Link
US (1) US3737709A (enrdf_load_stackoverflow)
CA (1) CA950957A (enrdf_load_stackoverflow)
DE (1) DE2152578A1 (enrdf_load_stackoverflow)
FR (1) FR2114685A5 (enrdf_load_stackoverflow)
GB (1) GB1335635A (enrdf_load_stackoverflow)
NL (1) NL7016726A (enrdf_load_stackoverflow)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4107565A (en) * 1975-04-02 1978-08-15 Tokyo Shibaura Electric Co., Ltd. Mercury emitting structure
US4203049A (en) * 1977-06-27 1980-05-13 U.S. Philips Corporation Electric lamp with hydrogen getter and hydrogen getter
WO1981000029A1 (en) * 1979-06-22 1981-01-08 Lucitron Inc Flat-panel display and method of manufacture
US4827188A (en) * 1986-09-27 1989-05-02 Thorn Emi Plc Hydrogen getter and method of manufacture
EP0645536A1 (en) * 1993-09-17 1995-03-29 Leybold Inficon, Inc. Sorption pump
EP0853328A1 (en) * 1997-01-10 1998-07-15 SAES GETTERS S.p.A. Frittable evaporable getter device having a high yield of barium
US6104138A (en) * 1997-01-10 2000-08-15 Saes Getters S.P.A. Frittable-evaporable getters having discontinuous metallic members, radial recesses and indentations
WO2005031795A1 (en) * 2003-09-30 2005-04-07 Philips Intellectual Property & Standards Gmbh Low-pressure gas discharge lamp having a means for binding oxygen and water
US20160069338A1 (en) * 2014-08-08 2016-03-10 Vaclab Inc. Non-evaporable getter and non-evaporable getter pump
US10232302B2 (en) * 2014-06-24 2019-03-19 Panasonic Intellectual Property Management Co., Ltd. Gas-adsorbing device and evacuated insulating material using same

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4107565A (en) * 1975-04-02 1978-08-15 Tokyo Shibaura Electric Co., Ltd. Mercury emitting structure
US4203049A (en) * 1977-06-27 1980-05-13 U.S. Philips Corporation Electric lamp with hydrogen getter and hydrogen getter
WO1981000029A1 (en) * 1979-06-22 1981-01-08 Lucitron Inc Flat-panel display and method of manufacture
US4303847A (en) * 1979-06-22 1981-12-01 Lucitron, Inc. Flat-panel display with gas-impervious metallic sheet forming part of sealed enclosure
US4827188A (en) * 1986-09-27 1989-05-02 Thorn Emi Plc Hydrogen getter and method of manufacture
EP0645536A1 (en) * 1993-09-17 1995-03-29 Leybold Inficon, Inc. Sorption pump
EP0853328A1 (en) * 1997-01-10 1998-07-15 SAES GETTERS S.p.A. Frittable evaporable getter device having a high yield of barium
US6104138A (en) * 1997-01-10 2000-08-15 Saes Getters S.P.A. Frittable-evaporable getters having discontinuous metallic members, radial recesses and indentations
WO2005031795A1 (en) * 2003-09-30 2005-04-07 Philips Intellectual Property & Standards Gmbh Low-pressure gas discharge lamp having a means for binding oxygen and water
US10232302B2 (en) * 2014-06-24 2019-03-19 Panasonic Intellectual Property Management Co., Ltd. Gas-adsorbing device and evacuated insulating material using same
US20160069338A1 (en) * 2014-08-08 2016-03-10 Vaclab Inc. Non-evaporable getter and non-evaporable getter pump
US9945368B2 (en) * 2014-08-08 2018-04-17 Vaclab Inc. Non-evaporable getter and non-evaporable getter pump
US10107277B2 (en) 2014-08-08 2018-10-23 Vaclab Inc. Non-evaporable getter and non-evaporable getter pump

Also Published As

Publication number Publication date
NL7016726A (enrdf_load_stackoverflow) 1972-05-16
DE2152578A1 (de) 1972-05-25
CA950957A (en) 1974-07-09
FR2114685A5 (enrdf_load_stackoverflow) 1972-06-30
GB1335635A (en) 1973-10-31

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