US3725712A - Triple electron gun assembly having units attached by glass beads to protrusion from convergence electrode - Google Patents

Triple electron gun assembly having units attached by glass beads to protrusion from convergence electrode Download PDF

Info

Publication number
US3725712A
US3725712A US00184776A US3725712DA US3725712A US 3725712 A US3725712 A US 3725712A US 00184776 A US00184776 A US 00184776A US 3725712D A US3725712D A US 3725712DA US 3725712 A US3725712 A US 3725712A
Authority
US
United States
Prior art keywords
electron gun
protrusion
units
gun units
triple
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
US00184776A
Other languages
English (en)
Inventor
S Sawagata
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.)
Toshiba Corp
Original Assignee
Tokyo Shibaura Electric Co 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 Tokyo Shibaura Electric Co Ltd filed Critical Tokyo Shibaura Electric Co Ltd
Application granted granted Critical
Publication of US3725712A publication Critical patent/US3725712A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • H01J29/51—Arrangements for controlling convergence of a plurality of beams by means of electric field only
    • 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
    • H01J29/70—Arrangements for deflecting ray or beam
    • H01J29/701—Systems for correcting deviation or convergence of a plurality of beams by means of magnetic fields at least
    • H01J29/707—Arrangements intimately associated with parts of the gun and co-operating with external magnetic excitation devices

Definitions

  • Said assembly consists of three electron gun units prepared from stacks of electrodes and integrally fixed at the prescribed convergence angle.
  • complicated assembling jigs to secure the convergence electrode to the three combined electron gun members in coaxial relationship and with high precision.
  • the assembling operation is accompanied with considerable difficulties, most likely causing the assembled electron gun members to be undesirably ill matched or damaged with the resultant occurrence of many disqualified products.
  • the convergence electrode is provided at the bottom with a protrusion, to which there are fitted the forward ends of the three combined electron gun members.
  • the protrusion corresponds in size and shape with the top ends of the three electron gun units constituting the three combined electron gun members.
  • On the edge of the protrusion are preferably formed three tongue members at an equal interval.
  • the forward ends of the three electron gun units are also preferably provided with tongue members corresponding to those of the protrusion.
  • the convergence electrode is fixed to the forward ends of the three assembled electron gun members by welding the tongue members of the protrusion of the convergence electrode with those of the gun members.
  • FIG. 1 is a perspective view of the triple electron gun assembly of this invention
  • FIG. 2 is a perspective view of the convergence electrode ofFIG. 1;
  • FIG. 3 is a perspective view of a shield member fitted to the convergence electrode of FIG. 2;
  • FIG. 4 is a perspective view of the three assembled electron gun members of FIG. 1.
  • FIG. 1 illustrates a triple electron gun assembly prepared by fitting to a convergence electrode 1 1 three electron gun members 30 consisting of three electron gun units 36 integrally put together.
  • the convergence electrode 11 is formed into a cup-shape, and has its peripheral wall bored with three pairs of slits 12, each pair being disposed at an equal interval.
  • a substantially L-shaped magnetic strip 13 Into each slit 12 is inserted a substantially L-shaped magnetic strip 13.
  • the cup-shaped convergence electrode 11 has a protrusion 14 formed at the bottom in coaxial relationship.
  • the protrusion 14 has three cylindrical walls 15 the axial centers of which are positioned respectively on the apices of an equilateral triangle.
  • the protrusion 14 further has three through holes 16 bored coaxially with the cylindrical walls 15 and tongue members 17 extending outward preferably from those parts of the peripheral edge of the bottom surface 15 of the protrusion 14 which face the through holes 16 as viewed from the center of the protrusion 14.
  • the concave portions defined by the adjacent cylindrical walls 15 have a plain surface 19, from the center of which there are cut out two mutually facing upright pieces to constitute a pair of support members 20.
  • a notch 21 In that portion of the bottom of the convergence electrode 11 which faces the interspace between said support members 20 is formed a notch 21.
  • a notch 22 In that portion of the peripheral edge of the forward end of the convergence electrode 11 which is disposed opposite to said notch 21.
  • a shield electrode 25 illustrated in FIG. 3 consisting of three shield plates 26, which define an equal interior angle between the adjacent ones, that is, are formed in a generally Y-shape.
  • Each shield plate 26 is formed at one end into a stepped portion, in one side of which there is cut out a notch 27.
  • a protrusion 28 at right angles to the plane of said plate 26.
  • a triple electron gun assembly 30 is formed of three electron gun units 36 integrally put together by glass beads 37 at a prescribed slight convergence angle to each other, each of said units 36 comprising a first cylindrical grid electrode 31 containing a cathode (not shown) and second, third, fourth and fifth cylindrical grid electrodes 32, 33, 34 and 35 arranged coaxially with said first grid electrode 31.
  • the outer ends of the fifth grid electrodes 35 are provided with tongue members 38 corresponding to those of the aforementioned convergence electrode 11.
  • This triple electron gun assembly 30 is fitted to the bottom 18 of the protrusion 14 of the convergence electrode 11, in such a manner that the outer ends of the fifth grid electrodes 35 are brought into contact with said bottom 18 with the tongue members 17 of the protrusion 14 superposed on the tongue members 38 of said fifth electrodes 35. Both groups 17 and 38 of the tongue members are welded together so as to secure the triple electron gun assembly 30 to the convergence electrode 11.
  • the top ends of the glass beads 37 are fused jointly to fix the forward ends of the shield plates 26 disposed in the interspaces of the three pairs of the support mem-' bers 20 formed on the plain surfaces 19 of the concave portions of the protrusion 14.
  • the cup-shaped convergence electrode 11 shown in FIG. 2 is press molded in advance. Into said convergence electrode 11 is inserted a shield electrode 25 illustrated in FIG. 3.
  • each shield plate 26 of the shield electrode 25 is inserted between the paired support members of the convergence electrode 11.
  • the protrusion 28 at the outer corner of the forward end of the shield plate 26 engages the notch 22 formed in the peripheral edge of the forward end of the convergence electrode 11.
  • the convergence electrode 11 into which the shield electrode 25 has been inserted is supported by an assembling jig having three rods with said rods inserted into the through holes 16 bored in the protrusion 14 of the convergence electrode 11.
  • Each rod of the assembling jig is made to pass through the fifth, fourth, third, second and first grid electrodes in turn with a spacer interposed therebetween.
  • glass beads 37 which integrally fix the electrode stacks by being fused to the outer ends of mounting brackets 39 attached to the respective grid electrodes 31 to 35. At this time the glass beads are also fused to the support strips 20 formed on the plain surfaces 19 of the protrusion 14' to support the convergence electrode 11 and part of the rear end of each shield plate 26 as well as to said mounting brackets 39.
  • the assembling jig is removed, there is inserted a magnetic strip 13 into each of the three pairs of slits 12 formed in the peripheral walls of the convergence electrode 11, and there is received a cathode in the first grid electrode, thus completing a triple electron gun assembly.
  • a triple electron gun assembly comprising:
  • three electron gun units each including a plurality of coaxially arranged grid electrodes, the central axes of said gun units being arranged to form the apices of an equilateral triangle;
  • a cupshaped convergence electrode having a protrusion at the bottom thereof which has a surface mating with the top end of the three electron gun units and locating the three electron gun units so as to provide convergent electron beams, said protrusion having three apertures therein located along the central axes of respective ones of the electron gun units for passing the electron beams from said respective electron gun.
  • said protrusion including three substantially cylindrical walls corresponding substantially to the outline of the mating surfaces of said three electron gun units and three substantially flat surfaces formed in the three concave portions defined by the adjacent walls of said cylindrical walls, said glass beads being attached to the respective substantially flat surfaces, the lower surface of said protrusion being fitted to the top mating ends of the electron gun units so as to facilitate accurate positioning and attaching of said electron gun units to said convergence electrode.

Landscapes

  • Electrodes For Cathode-Ray Tubes (AREA)
US00184776A 1970-10-20 1971-09-29 Triple electron gun assembly having units attached by glass beads to protrusion from convergence electrode Expired - Lifetime US3725712A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1970103549U JPS4922845Y1 (enrdf_load_stackoverflow) 1970-10-20 1970-10-20

Publications (1)

Publication Number Publication Date
US3725712A true US3725712A (en) 1973-04-03

Family

ID=33265100

Family Applications (1)

Application Number Title Priority Date Filing Date
US00184776A Expired - Lifetime US3725712A (en) 1970-10-20 1971-09-29 Triple electron gun assembly having units attached by glass beads to protrusion from convergence electrode

Country Status (2)

Country Link
US (1) US3725712A (enrdf_load_stackoverflow)
JP (1) JPS4922845Y1 (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3991338A (en) * 1974-02-26 1976-11-09 U.S. Philips Corporation Convergence unit having three identical V-shape bent plates for shielding pole shoes
US4063340A (en) * 1976-01-16 1977-12-20 Zenith Radio Corporation Method of manufacturing a unitized in-line electron gun

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3250935A (en) * 1964-08-04 1966-05-10 Kentucky Electronics Inc Matrix multiple gun assembly for cathode ray tube
US3603829A (en) * 1969-05-16 1971-09-07 Tokyo Shibaura Electric Co Inline type triple electron gun assembly
US3643121A (en) * 1968-06-10 1972-02-15 Tokyo Shibaura Electric Co A triple electron gun apparatus provided with convergence electrode

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3250935A (en) * 1964-08-04 1966-05-10 Kentucky Electronics Inc Matrix multiple gun assembly for cathode ray tube
US3643121A (en) * 1968-06-10 1972-02-15 Tokyo Shibaura Electric Co A triple electron gun apparatus provided with convergence electrode
US3603829A (en) * 1969-05-16 1971-09-07 Tokyo Shibaura Electric Co Inline type triple electron gun assembly

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3991338A (en) * 1974-02-26 1976-11-09 U.S. Philips Corporation Convergence unit having three identical V-shape bent plates for shielding pole shoes
US4063340A (en) * 1976-01-16 1977-12-20 Zenith Radio Corporation Method of manufacturing a unitized in-line electron gun

Also Published As

Publication number Publication date
JPS4922845Y1 (enrdf_load_stackoverflow) 1974-06-19

Similar Documents

Publication Publication Date Title
JPS63895B2 (enrdf_load_stackoverflow)
JPH021352B2 (enrdf_load_stackoverflow)
GB1514235A (en) Cathode ray tube distortion correction
US3725712A (en) Triple electron gun assembly having units attached by glass beads to protrusion from convergence electrode
JPS5954151A (ja) カラ−表示管
GB1082108A (en) Jig for assembling a plurality of electron guns to form an electron gun mount
GB1588084A (en) Fiat display device with beam guide
HK2386A (en) Colour display tube
US3603829A (en) Inline type triple electron gun assembly
US3745397A (en) Pyramidal gun array having resilient member contacting corresponding supports of each of three guns
KR920001832B1 (ko) 인-라인 전자총 구조물
KR910009661B1 (ko) 칼라음극선관 및 그 전자총 전극구조의 제조방법
US3816789A (en) In-line type triple electron gun assembly
EP0158388A1 (en) Device for and method of assembling an integrated electron gun system
US3614502A (en) Electron gun convergence assembly
US3140419A (en) Electron discharge tube having an anode with cavities
US3643121A (en) A triple electron gun apparatus provided with convergence electrode
CA2156322C (en) Inline electron gun having improved expanded focus lens electrodes
US4100453A (en) Electrical connection of electrodes in multiple gun electrode structure
US3935498A (en) Electron gun assembly
JPS6019103B2 (ja) カラ−受像管用インライン型電子銃
JPH0650618B2 (ja) 光電子増倍管
JPH0680579B2 (ja) 電子銃
EP0205222B1 (en) Colour television display tube with coma correction
JPH0793109B2 (ja) 電子銃