GB830319A - Improvements in or relating to velocity-modulated tubes - Google Patents

Improvements in or relating to velocity-modulated tubes

Info

Publication number
GB830319A
GB830319A GB1162658A GB1162658A GB830319A GB 830319 A GB830319 A GB 830319A GB 1162658 A GB1162658 A GB 1162658A GB 1162658 A GB1162658 A GB 1162658A GB 830319 A GB830319 A GB 830319A
Authority
GB
United Kingdom
Prior art keywords
cathode
getter substance
velocity
titanium
getter
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
GB1162658A
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.)
Siemens and Halske AG
Siemens AG
Original Assignee
Siemens and Halske AG
Siemens AG
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 Siemens and Halske AG, Siemens AG filed Critical Siemens and Halske AG
Publication of GB830319A publication Critical patent/GB830319A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J23/00—Details of transit-time tubes of the types covered by group H01J25/00
    • H01J23/02—Electrodes; Magnetic control means; Screens
    • 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
    • H01J7/183—Composition or manufacture of getters

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
  • Common Detailed Techniques For Electron Tubes Or Discharge Tubes (AREA)

Abstract

830,319. Velocity-modulated tubes. SIEMENS & HALSKE A.G. April 11, 1958 [April 11, 1957], No. 11628/58. Class 39(1). In a velocity-modulated tube including an electron beam generating system and focusing means for concentrating the beam close to its axis, in which the preferred operating pressure of 10À8 mm. is not obtained, the gas residue is converted by the electron beam into ions which are concentrated by the focusing means to travel substantially concentrically with and in the immediate vicinity of the axis of the beam in a direction opposite thereto and a plate of getter substance, adapted to be heated, is arranged across the path of the ions. As shown in Fig. 1 the plate 3 of getter substance, which may be zirconium, tantalum, niobium or titanium, may be arranged at the centre of an annular electron-emissive coating 2 on the cathode 1. Alternatively a concave plate of getter substance may be arranged behind a central opening in the cathode. The getter substance may be heated by the cathodeheating means or separate heating means may be provided. In a further embodiment the getter substance 6 is coated on a re-entrant portion of the cathode 1 or this re-entrant portion may consist entirely of the getter substance. If titanium is used as the getter substance with a nickel cathode, a tantalum foil may be inserted between the titanium and the nickel of the cathode to prevent these substances from alloying.
GB1162658A 1957-04-11 1958-04-11 Improvements in or relating to velocity-modulated tubes Expired GB830319A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES53091A DE1026006B (en) 1957-04-11 1957-04-11 Beam generation system for electrical discharge vessels, especially run-time tubes

Publications (1)

Publication Number Publication Date
GB830319A true GB830319A (en) 1960-03-16

Family

ID=7489077

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1162658A Expired GB830319A (en) 1957-04-11 1958-04-11 Improvements in or relating to velocity-modulated tubes

Country Status (3)

Country Link
DE (1) DE1026006B (en)
FR (1) FR1239914A (en)
GB (1) GB830319A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3195716A (en) * 1961-02-04 1965-07-20 Porta Paolo Della Mixed getter devices, with evaporated and not evaporated gettering material, for maintaining the vacuum in electronic tubes
US3225910A (en) * 1961-02-04 1965-12-28 Porta Paolo Della Getter devices with non-evaporated gettering material, for maintaining vacuum in electronic tubes
DE1298648B (en) * 1962-05-09 1969-07-03 Siemens Ag Time-of-flight tubes with ion traps arranged coaxially around the electron beam

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE761089C (en) * 1937-12-31 1954-04-29 Siemens & Halske A G Indirectly heated glow cathode for Braun tubes
DE867115C (en) * 1942-09-17 1953-02-16 Telefunken Gmbh Cathode system for cathode ray tubes

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3195716A (en) * 1961-02-04 1965-07-20 Porta Paolo Della Mixed getter devices, with evaporated and not evaporated gettering material, for maintaining the vacuum in electronic tubes
US3225910A (en) * 1961-02-04 1965-12-28 Porta Paolo Della Getter devices with non-evaporated gettering material, for maintaining vacuum in electronic tubes
DE1298648B (en) * 1962-05-09 1969-07-03 Siemens Ag Time-of-flight tubes with ion traps arranged coaxially around the electron beam

Also Published As

Publication number Publication date
FR1239914A (en) 1960-09-02
DE1026006B (en) 1958-03-13

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