US3806108A - Work holder for assembling a cathode ray tube envelope - Google Patents

Work holder for assembling a cathode ray tube envelope Download PDF

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Publication number
US3806108A
US3806108A US00192816A US19281671A US3806108A US 3806108 A US3806108 A US 3806108A US 00192816 A US00192816 A US 00192816A US 19281671 A US19281671 A US 19281671A US 3806108 A US3806108 A US 3806108A
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US
United States
Prior art keywords
funnel
geometric center
annular seat
cathode ray
ray 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
US00192816A
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English (en)
Inventor
H Adachi
Y Tsukamura
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.)
Sony Corp
Original Assignee
Sony 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 Sony Corp filed Critical Sony Corp
Application granted granted Critical
Publication of US3806108A publication Critical patent/US3806108A/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
    • H01J29/86—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
    • 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
    • H01J9/244—Manufacture or joining of vessels, leading-in conductors or bases specially adapted for cathode ray tubes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S269/00—Work holders
    • Y10S269/908—Work holder for cathode-ray tubes

Definitions

  • ABSTRACT A cathode ray tube envelope consisting of a neck portion, a funnel portion and a panel portion having a rectangular screen is assembled with reference to the round portion of the funnel portion.
  • the cross section of the round portion is circular and accordingly the geometric'center of the funnel portion can be detected easily.
  • glass cathode ray or color television picture tube envelopes consist of a neck portion having enclosed therein an electron gun, a funnel portion having wide and narrow openings at opposite ends thereof and a viewing panel portion having formed thereon a phosphor screen and, if necessary, having attached thereto a shadow mask, these portions being sealed together as by frit glass to form a completed tube envelope.
  • the three portions must be assembled together precisely in predetermined relationships to one another.
  • one object of this invention is to provide an apparatus for assembling cathode ray tube envelopes with which it is possible to seal the neck, funnel and panel screen portions together as a unitary structure with these portions being precisely aligned with one another.
  • Another object of this invention is to provide a .method for assembling the neck portion and/or panel screen portion with a funnel portion with reference to the round portion (defined later on) of the funnel portion of a tube envelope.
  • Another object of this invention is to provide a method for assembling the neck portion with the funnel portion of a tube envelope with reference to the round portion of the latter.
  • Another object of this invention is to provide a method for assembling the panel screen portion with the funnel portion of a tube envelope with reference to the round portion of the latter.
  • Another object of this invention is to provide a jig for inspection of a composite funnel-neck article with reference to the round portion of the funnel portion.
  • Still another object of this invention is to provide a novel method for assembling a cathode ray tube having a rectangular panel screen.
  • FIG. 1 is a schematic diagram, for explaining this invention
  • a neck portion 1 is sealed to a sealing end 2b of a funnel portion 2 with the geometric center axis X--X of the former being aligned with that O of a sealing end 2a of the latter and a panel screen portion 3 is sealed to the sealing end 2a of the funnel portion 2 with the geometric center P being aligned with that O of the former, thus providing a composite article 4.
  • the geometric center axis X--X of the neck portion 1 is selected perpendicu lar to the sealing end 2a of the funnel portion 2 and/or the viewing screen of the panel screen portion 3.
  • it is very different precisely to find out the geometric center 0 of the sealing end 2a of the funnel portion 2.
  • the present invention does not involve such detection of the geometric center of the sealing end 2a, and hence allows much ease in the fabrication of cathode ray tube envelopes.
  • reference numeral 5 indicates generally an apparatus or a jig for assembling a cathode ray tube envelope.
  • the apparatus 5 comprises a first positioning means 8 for aligning the center of a round portion 13 of a funnel portion 2 with the geometric center of a neck portion 1 and, preferably, a second positioning means 10 for aligning the geometric center P of a panel screen portion 3 with the extension YY of a line joining the center of the first positioning means 8, that is, the round portion 13 with the center of the neck portion 1.
  • the round portion 13 of the funnel portion 2 herein mentioned is one part of the tubular portion of the funnel 2 which may include a small open end 2! and on which a deflection coil assembly (not shown) is mounted and the round portion 13 substantially corresponds to the center of electron beam deflection.
  • a cathode ray tube having a rectangular panel screen itssealing end 211 is naturally substantially rectangular but the sealing end 2b is circular, of course.
  • the cross section of the funnel 2 is rectangular at its sealing end 2a but becomes gradually round as the sealing end 2b is approached and truly circular at the sealing end 2b.
  • the portion of the funnel 2 where its crosssection becomes round is defined as a round portion in this specification. This round portion is used as a reference portion of the cathode ray tube according to this invention.
  • the first positioning means 8 consists of a circular, ring-shaped member 6 for receiving the round portion 13 of the funnel 2 and, for example, a pair of holders 7a and 7b extending downwardly thereof for holding that portion of the neck portion 1 in which an electron gun is disposed. At least one of the holders 7a and 7b is formed integrally with the ring-shaped member 6 and the other is pivotally mounted to the member 6 for pressing the neck portion 1 to the one holder. Further, the first positioning means 8 is designed so that a line joining the center of the ring-shaped member 6 with that of a circular space defined by arc-shaped depressions of the both holders 7a and 7b may be aligned with a vertical line YY. Namely, by setting the neck portion 1 on the positioning means 8, mounting the funnel 2 thereon and sealing them to each other, the center of the round portion 13 automatically coincides with the center of the neck portion 1.
  • the second positioning means consists of an arm 16 extending upward from the ring-shaped member 6 and an L-shaped limit member 14 extending laterally from the upper end of the arm 16 to conform to two adjacent side walls of the rectangular panel screen portion 3.
  • the L-shaped member 14 carries two position adjusting screws A and 15B in its one side and one position adjusting screw 15C in the other side.
  • first and second positioning means 8 and 10 are supported by a base 9 secured to the ring-shaped member 6.
  • the base 9 is made up of three base member 1 1a, 1 1b and 1 10 arranged, for example, in a triangular form and three supports 12a, 12b and 12c formed integrally therewith.
  • the first and second positioning means 8 and 10 and the base 9 are formed of, for example, iron, as a unitary structure with one another as will be seen from the figure.
  • the neck, funnel and panel screen portions 1, 2 and 3 are placed one on another with the use of the jig 5 and placed, as they are, in a furnace to be sealed together with frit glass to produce a completed cathode ray tube envelope.
  • the neck, funnel and panel screen portions 1, 2 and 3 are positioned as predetermined by the holders 7a and 7b, the ring-shaped member 6 and the L-shaped limit member 14.
  • the panel screen portion 3 is assembled with a composite funnel-neck article by the use of the jig 5 shown in FIG. 2.
  • the composite funnel-neck article is mounted on the jig 5. Since the ring-shaped member 6 and the holders 7a and 7b are constructed as previously described, the extension connecting the center of the neck portion 1 with that ofthe round portion 13 of the funnel 2 coincides with the perpendicular YY which serves as the reference line.
  • a plurality of measuring points G G and G which abut against the sealing edge with the ringshaped member 6, that is, the round portion sealing 13 being used as the reference, is provided in association with the jig 5 and the gradient of the sealing edge 2a is measured from the amount of displacement (height) of each of the measuring points 0,, G and G
  • the sealing edge 20 is not perpendicular to the reference line YY
  • the sealing edge 2a is ground to be perpendicular to the line YY, then, the panel screen portion 3 is placed on the funnel 2.
  • the center P of the panel screen portion 3 is aligned with the reference line YY and then the panel screen portion 3 is fixed to the funnel 2 by means of frit glass.
  • sealing of the funnel 2 to the panel screen portion 3 is achieved using as a reference the line connecting the center axis of the neck portion 1 with the center of the round portion 13 of the funnel 2.
  • This allows ease in aligning the axes of a deflection yoke magnetic field and an electron beam with each other in the subsequent assembling of an electron gun and a deflection coil assembly with the tube envelope, thereby to facilitate assembling of cathode ray tubes.
  • this invention does not involve detection of the center of the sealing end 2a, so that assembling of the funnel 2 with the panel screen portion 3 is easy.
  • the line connecting the axis of the electron gun with the electron beam deflection center is used as the reference line, so that even if the funnel 2 and the neck portion 1 are sealed to each other a little out of position, the composite funnel-neck article can be used, with the result that yield of the cathode ray tube envelopes can be raised.
  • the centers 0 and P of the round portion 13 of the funnel 2 and the panel screen portion 3 are aligned with the geometric center axis XX of the neck portion 1 but the neck portion 1 may be a little inclined to the panel screen portion 3 so long as the electron gun and the panel screen portion 3 are. in' predetermined alignment with each other. Namely, it is sufficient only to position the centers 0 and P of the round portion 13 of the funnel 2 and the panel screen portion 3 on the line passing through the center of any cross section of the neck portion 1.
  • a jig for assembling a cathode ray tube envelope formed of two joined component parts which include: a tubular neck part and a funnel part having a small end portion of circular cross section and a large end portion of generally rectangular cross section, said parts joined together forming a portion of a cathode ray tube; said jig comprising a frame which includes at least a portion of an annular seat for receiving and seating said funnel part in.
  • a jig for assembling a cathode ray tube envelope formed of a plurality of component parts which include: a tubular neck part, a funnel part joined to said tubular neck part and having a small end portion of circular cross section and a large end portion of generally rectangular cross section, and a rectangular panel part to form a cathode ray tube envelope; said jig comprising a frame which includes at least a portion of an annular seat for receiving and seating said funnel part in a region where its cross section is circular, at least one arm in fixed relation to said annular sea't located below said annular seat, said arm having receiving means for holding said neck part, an upstanding arm rigidly secured to said frame and having a fixed relation to said cation of the geometric center of said panel part in a second plane parallel to said first plane, said geometric center axis passing through said geometric centers of said funnel part and said rectangular panel part.
  • Ajig according to claim 1 in which a plurality of contacts are provided to determine the perpendicularity of the edges of the rectangular portion of the funnel part to the geometric center axis of the neck part.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
US00192816A 1970-10-30 1971-10-27 Work holder for assembling a cathode ray tube envelope Expired - Lifetime US3806108A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP45096239A JPS523551B1 (xx) 1970-10-30 1970-10-30

Publications (1)

Publication Number Publication Date
US3806108A true US3806108A (en) 1974-04-23

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ID=14159664

Family Applications (1)

Application Number Title Priority Date Filing Date
US00192816A Expired - Lifetime US3806108A (en) 1970-10-30 1971-10-27 Work holder for assembling a cathode ray tube envelope

Country Status (7)

Country Link
US (1) US3806108A (xx)
JP (1) JPS523551B1 (xx)
CA (1) CA960284A (xx)
DE (1) DE2154083A1 (xx)
FR (1) FR2110142A5 (xx)
GB (1) GB1371520A (xx)
NL (1) NL7114977A (xx)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3990692A (en) * 1975-09-30 1976-11-09 Rca Corporation Article positioning apparatus
US4179778A (en) * 1977-12-29 1979-12-25 Gte Sylvania Incorporated Means for minimizing processing implosions in CRT manufacture
US4335492A (en) * 1978-11-22 1982-06-22 International Standard Electric Corporation Method of aligning a color tube cone and apparatus for carrying out the method
US4373237A (en) * 1978-12-27 1983-02-15 U.S. Philips Corporation Method of manufacturing a color television display tube
US4549727A (en) * 1983-09-26 1985-10-29 Kozar John J Lazy susan vise
US4566848A (en) * 1984-07-31 1986-01-28 Rca Corporation Device for positioning and orienting kinescopes
US4718203A (en) * 1978-06-05 1988-01-12 U.S. Philips Corporation Method for working the funnel portion of a cathode ray tube
US4764138A (en) * 1978-12-27 1988-08-16 U.S. Philips Corporation Method of manufacturing a color television display tube and color television display tube manufactured according to the method
US4883439A (en) * 1986-12-08 1989-11-28 Sony Corporation Apparatus for fixturing a cathode ray tube

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2855472C2 (de) * 1978-12-22 1984-06-20 Schott Glaswerke, 6500 Mainz Verfahren zur Herstellung eines Trichters für eine Kathodenstrahlröhre

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2889952A (en) * 1956-02-01 1959-06-09 Corning Glass Works Composite article and method
US3118662A (en) * 1957-12-20 1964-01-21 Rca Corp Sealing fixture for glass bulbs
US3305123A (en) * 1964-01-09 1967-02-21 Zenith Radio Corp Cathode-ray tube
US3329422A (en) * 1964-08-28 1967-07-04 Rauland Corp Sealing fixture
US3369881A (en) * 1964-10-28 1968-02-20 Corning Glass Works Cathode ray tube envelopes and methods of preparing parts therefor and fabricating such envelopes
US3381347A (en) * 1964-09-03 1968-05-07 Motorola Inc Cathode ray tube manufacture

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2889952A (en) * 1956-02-01 1959-06-09 Corning Glass Works Composite article and method
US3118662A (en) * 1957-12-20 1964-01-21 Rca Corp Sealing fixture for glass bulbs
US3305123A (en) * 1964-01-09 1967-02-21 Zenith Radio Corp Cathode-ray tube
US3329422A (en) * 1964-08-28 1967-07-04 Rauland Corp Sealing fixture
US3381347A (en) * 1964-09-03 1968-05-07 Motorola Inc Cathode ray tube manufacture
US3369881A (en) * 1964-10-28 1968-02-20 Corning Glass Works Cathode ray tube envelopes and methods of preparing parts therefor and fabricating such envelopes

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3990692A (en) * 1975-09-30 1976-11-09 Rca Corporation Article positioning apparatus
US4179778A (en) * 1977-12-29 1979-12-25 Gte Sylvania Incorporated Means for minimizing processing implosions in CRT manufacture
US4718203A (en) * 1978-06-05 1988-01-12 U.S. Philips Corporation Method for working the funnel portion of a cathode ray tube
US4335492A (en) * 1978-11-22 1982-06-22 International Standard Electric Corporation Method of aligning a color tube cone and apparatus for carrying out the method
US4373237A (en) * 1978-12-27 1983-02-15 U.S. Philips Corporation Method of manufacturing a color television display tube
US4764138A (en) * 1978-12-27 1988-08-16 U.S. Philips Corporation Method of manufacturing a color television display tube and color television display tube manufactured according to the method
US4549727A (en) * 1983-09-26 1985-10-29 Kozar John J Lazy susan vise
US4566848A (en) * 1984-07-31 1986-01-28 Rca Corporation Device for positioning and orienting kinescopes
US4883439A (en) * 1986-12-08 1989-11-28 Sony Corporation Apparatus for fixturing a cathode ray tube

Also Published As

Publication number Publication date
JPS523551B1 (xx) 1977-01-28
CA960284A (en) 1974-12-31
DE2154083A1 (de) 1972-05-04
GB1371520A (en) 1974-10-23
FR2110142A5 (xx) 1972-05-26
NL7114977A (xx) 1972-05-03

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