GB1353584A - Vacuum tubes - Google Patents

Vacuum tubes

Info

Publication number
GB1353584A
GB1353584A GB1353584DA GB1353584A GB 1353584 A GB1353584 A GB 1353584A GB 1353584D A GB1353584D A GB 1353584DA GB 1353584 A GB1353584 A GB 1353584A
Authority
GB
United Kingdom
Prior art keywords
envelope
jig
electrodes
glass
frit
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
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.)
Sinclair Radionics Ltd
Original Assignee
Sinclair Radionics Ltd
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 Sinclair Radionics Ltd filed Critical Sinclair Radionics Ltd
Publication of GB1353584A publication Critical patent/GB1353584A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
    • H01J29/48—Electron guns
    • 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
    • H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
    • 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
    • H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
    • H01J29/82—Mounting, supporting, spacing, or insulating electron-optical or ion-optical arrangements
    • 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
    • H01J29/86—Vessels; Containers; Vacuum locks
    • H01J29/861—Vessels or containers characterised by the form or the structure thereof
    • 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
    • H01J29/92—Means forming part of the tube for the purpose of providing electrical connection to it
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J31/00—Cathode ray tubes; Electron beam tubes
    • H01J31/08—Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
    • H01J31/10—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes
    • H01J31/12—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes with luminescent screen
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/24—Manufacture or joining of vessels, leading-in conductors or bases
    • H01J9/26—Sealing together parts of vessels

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)

Abstract

1353584 Sealing glass to glass and metal leads SINCLAIR RADIONICS Ltd 19 April 1971 [12 March 1970 (2)] 11793/70 and 11794/70 Heading C1M [Also in Division H1] The envelope of a cathode-ray display tube is formed of at least two parts joined together along a seam through which pass electrical connections to the various electrodes. The tube may comprise two generally semicylindrical portions which support the electrodes by clamping the lead-in wires between them, and a cup-shaped end portion 12, Fig. 5, carrying a luminescent screen. The electrodes may be assembled on a jig (Figs. 31-35, not shown), and two envelope parts (10, 11) which surround the electrodes may also rest on the jig where they are held by clips which engage locating pips (114) on the envelope parts. After assembly of the electrodes on the jig, the two envelope parts are secured together either by an adhesive applied over half the width of the seal or by means of a glass frit; the jig is removed and the cup-shaped portion is sealed to the envelope by means of a glass frit of lower melting point than the first frit (if used), or if the first seal was made by an adhesive it may be completed at the same time by means of a glass frit applied on the other half of the width of the seal. The envelope portions are preferably a barium lithium glass and the glass frit is preferably of de-vitrifiable glass material and is preferably applied as a water suspension. The frit is fused by placing the assembly in an oven; the oven may be evacuated for the final seal so that the envelope is sealed and evacuated in the same process, or alternatively the evacuation may be carried out subsequently through an exhaust tubulation. As an alternative to using an internal jig the electrodes may be located by clamping their leads in an external jig whilst all three envelope portions are sealed together, either in vacuo or at atmospheric pressure. The support wires are copper-plated and borated in known manner to make them compatible with the frit; they are preferably left as flying leads by which the tube may be connected directly to a circuit, but may alternatively be connected to a base plug.
GB1353584D 1970-03-12 1970-03-12 Vacuum tubes Expired GB1353584A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB1179370 1970-03-12
GB1179470 1970-03-12
GB521471 1971-02-23

Publications (1)

Publication Number Publication Date
GB1353584A true GB1353584A (en) 1974-05-22

Family

ID=27254600

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1353584D Expired GB1353584A (en) 1970-03-12 1970-03-12 Vacuum tubes

Country Status (3)

Country Link
DE (1) DE2112699A1 (en)
FR (1) FR2081898B1 (en)
GB (1) GB1353584A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2391556A1 (en) * 1977-05-18 1978-12-15 Sinclair Radionics PERFECTED CATHODIC RAY TUBE

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2391556A1 (en) * 1977-05-18 1978-12-15 Sinclair Radionics PERFECTED CATHODIC RAY TUBE

Also Published As

Publication number Publication date
FR2081898B1 (en) 1973-10-19
DE2112699A1 (en) 1971-10-07
FR2081898A1 (en) 1971-12-10

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee