US2232087A - Braun tube - Google Patents

Braun tube Download PDF

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Publication number
US2232087A
US2232087A US221676A US22167638A US2232087A US 2232087 A US2232087 A US 2232087A US 221676 A US221676 A US 221676A US 22167638 A US22167638 A US 22167638A US 2232087 A US2232087 A US 2232087A
Authority
US
United States
Prior art keywords
throat
glass
conductors
braun tube
vessel
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
US221676A
Other languages
English (en)
Inventor
Uhlmann Wolfram
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.)
Alcatel Lucent Deutschland AG
C Lorenz AG
Original Assignee
Standard Elektrik Lorenz 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 Standard Elektrik Lorenz AG filed Critical Standard Elektrik Lorenz AG
Application granted granted Critical
Publication of US2232087A publication Critical patent/US2232087A/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
    • 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

Definitions

  • the present invention relates to Braun tubes, and more specifically to improvements in or relating to the electrode lead-in conductors which are extended through the wall of the vacuum vessel of 5 such tubes.
  • the invention makes use of the known glasscovered lead-in conductors, and has for its object to fix the entire number of electrode lead-in conductors in one annular portion formed in the o throat of the Braun tube, so as to avoid the necessity of providing one separate aperture in the wall for each individual lead-in conductor. It is thus possible by means of the present invention to eliminate the heretofore known method 25 which was suitable merely for fixing one or two lead-in conductors.
  • I denotes the vacuum vessel of a Braun tube.
  • the cathode ray producing and defleeting means are indicated at 2 in a pure schematic manner for the sake of simplicity and, by the same reason, only two of a plurality of elec- 40 trade lead-in conductors 3 are shown.
  • Each electrode of the cathode ray producing and deflecting means 2 is provided with a connector 5 and all of said connectors are fixed in a plate or disc I of a ceramic substance.
  • Each connector I is welded to its appertainlnglead-in conductor at a.
  • the vacuum vessel I consists of two portions, AandBofgla-ss.
  • OneendoftheportionA is drawn down to form a throat 6, and the portion B 50 has an annular extension l which is adapted to fit the throat I.
  • the inner surface of this throat 6 and theouter surfaceofthe annulus i are both coated with a vitreous melt and, moreover, the appropriate portions of the leads I are likewise 55 provided with a coating ll of glass.
  • the glass coatings I, S and it are fused together with one another as shown to the left in the drawing.
  • the individual glass coatings prior to the fusing oper ation are shown to the right of the drawing. It is thus obvious that the throat i and the extension 5 1 together form an annular member by means of which the leads 3 are fixedly mounted.
  • the above described arrangement may be manufactured in the following manner:
  • the cathode ray producing and deflecting means 2 are 10 assembled to one unit which is inserted in the portion A of the envelope or vessel I, and the corresponding end thereof is drawn down to a suitable smaller diameter and cut so as to provide a throat 6.
  • the lead-in conductors l are then ll welded at a to their respective electrode connectors 5, whereupon the glass-covered portions of the leads are bent toward the glass coating I of the throat S and fused thereto.
  • This fusing may be a provisional step which merely serves for pre liminarily obtaining a sticking between the leads I and the throat i.
  • the preparatorily tapered portion B is now brought into position with its annular extension or collar I, thus facingthe throat 6 and the leads 8, whereupon theglass portion I which, as mentioned above is applied on the outer surface of the extension I is preparatorily fused to the glass coating ll of the leads 3.
  • These provisional fusings between the glass coatings 8, Ill and 9, III, respectively, are then completed to a perfect vacuum seal and at the same time the tapered end of the vessel portion B is drawn down so as to provide an evacuating-pipe II. It is on the other hand possible to partially remove the end of the portion B remote from the extension or collar 1 andto attach a complete evacuating pipe to the remainder of portion B in any suitable manner.
  • a method of manufacturing Braun tubes 49 which consist of two portions, one of which is shaped to provide a throat of annular shape, the other having an annular extension which is received by the throat portion which method comprises the following sequence of steps: cutting the 5 tapered end of one of the portions of said Braun tube vessel to form a throat, applying a vitreous melt to the inner surface of said throat, placing glass-coated lead-in conductors in their appropriate positions relative to said throat, provision- 50 ally fusing said conductors to said throat, placing another giass-covered portion of said Braun tube vessel in position relative to said throat, and fusing said glass' coatings and said vitreous melt to a vacuum seal.

Landscapes

  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
US221676A 1937-07-31 1938-07-28 Braun tube Expired - Lifetime US2232087A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE203791X 1937-07-31

Publications (1)

Publication Number Publication Date
US2232087A true US2232087A (en) 1941-02-18

Family

ID=5778420

Family Applications (1)

Application Number Title Priority Date Filing Date
US221676A Expired - Lifetime US2232087A (en) 1937-07-31 1938-07-28 Braun tube

Country Status (3)

Country Link
US (1) US2232087A (de)
CH (1) CH203791A (de)
FR (1) FR840807A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3106463A (en) * 1959-05-04 1963-10-08 Penta Lab Inc Method of uniting an electron tube base structure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3106463A (en) * 1959-05-04 1963-10-08 Penta Lab Inc Method of uniting an electron tube base structure

Also Published As

Publication number Publication date
FR840807A (fr) 1939-05-04
CH203791A (de) 1939-03-31

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