WO2004003956A1 - Dispositif de positionnement pour un entonnoir de tube à rayons cathodiques - Google Patents

Dispositif de positionnement pour un entonnoir de tube à rayons cathodiques Download PDF

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Publication number
WO2004003956A1
WO2004003956A1 PCT/IB2003/002397 IB0302397W WO2004003956A1 WO 2004003956 A1 WO2004003956 A1 WO 2004003956A1 IB 0302397 W IB0302397 W IB 0302397W WO 2004003956 A1 WO2004003956 A1 WO 2004003956A1
Authority
WO
WIPO (PCT)
Prior art keywords
positioning device
article
discs
stops
funnel
Prior art date
Application number
PCT/IB2003/002397
Other languages
English (en)
Inventor
Pieter Scholten
Peter A. J. Jacobs
Original Assignee
Koninklijke Philips Electronics N.V.
KUNNEN, Henricus, Josephus
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 Koninklijke Philips Electronics N.V., KUNNEN, Henricus, Josephus filed Critical Koninklijke Philips Electronics N.V.
Priority to AU2003233137A priority Critical patent/AU2003233137A1/en
Publication of WO2004003956A1 publication Critical patent/WO2004003956A1/fr

Links

Classifications

    • 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

Definitions

  • a known positioning device is suitable for positioning a funnel comprising a back cone portion having a circular cross-section, and comprises a set of three discs, with rotary shafts of the discs being positioned in one and the same plane and being evenly distributed over a circle, a centre point of which determines a point of a longitudinal axis of the funnel.
  • the three discs abut against the back cone portion, such that the weight of the funnel is more or less evenly distributed over the discs.
  • the position of the fixed stops can be chosen so as to accurately define an x-position and a z-position of the funnel.
  • the movable stops are solely movable in the z-direction, and can be chosen so as to accurately define a y-position of the funnel.
  • An initial position of the movable stops can be chosen such that during insertion of the funnel, the funnel contacts the movable stops first.
  • the z-position of the movable stops is then automatically adjusted by a further movement of the funnel, until the point where the funnel contacts the fixed stops as well. In this way, it is assured that both the fixed stops and the movable stops abut against an inserted funnel.
  • Such a funnel is then properly held by the positioning device. Utilizing this embodiment of the positioning device according to the invention, any funnel of a certain design can be accurately positioned, in spite of small deviations in size which inevitably appear in actual practice.
  • the combination of cone 3 and neck 4 is referred to as funnel 5.
  • the panel 2 comprises a substantially rectangular display window 6 and an upright edge 7.
  • the neck 4 is substantially cylindrical, a neck wall 8 being substantially parallel with regard to a longitudinal axis 9 of the cathode ray tube 1.
  • the cone 3 comprises a front cone portion 16 and a back cone portion 17.
  • a back end 18 of the back cone portion 17 is joined to a front end 19 of the neck 4, for example by means of melting.
  • the periphery of the back end 18 of the back cone portion 17 is adapted to the periphery of the front end 19 of the neck 4 by being circular.
  • a front end 20 of the front cone portion 16 is joined to the upright edge 7 of the panel 2, for example by means of fritting.
  • the periphery of the front end 20 of the front cone portion 16 is adapted to the periphery of the upright edge 7 by being substantially rectangular.
  • a frame 33 is arranged at the top surface 25 of the receiving block 23 .
  • the frame 33 is mirror symmetrical about an axis of symmetry 34 extending in the x-direction, which in Fig. 2 is depicted by means of a dotted line.
  • the frame 33 is tiltable about a tilting axis 36 extending in the y-direction.
  • the tilting axis 36 is constituted by a linear narrowed portion 37 of the frame 33, whereby a resilient joint is obtained, which is resilient in the z-direction and rigid in the x-direction and the y- direction.
  • the frame 33 is connected to the receiving block 23 by means of a helical spring 39 extending in the z- direction.
  • the spring 39 is positioned on the axis of symmetry 34 of the frame 33.
  • a holder 40 is provided to engage the free side 38 of the frame 33, in order to keep the frame 33 in an initial position in which the frame 33 is slightly tilted with respect to the top surface 25 of the receiving block 23, as indicated by dotted lines in Fig. 3.
  • the frame 33 has an opening 41 to allow passage of the funnel 5 and to prevent the frame 33 from abutting against the x-discs 27, 28.
  • two circular y-discs 43, 44 are provided on rotary shafts 45, 46, which rotary shafts 45, 46 extend in the x-direction.
  • the y-discs 43, 44 comprise curved surfaces 47, 48 which are destined to abut against the back cone portion 17.
  • the diameter of the y-discs 43, 44 is typically 16 mm, but of course other values for the diameter can be chosen within the scope of the present invention.
  • the x-position of the y-discs 43, 44 is chosen such that the y-discs 43, 44 are positioned exactly in a centre plane extending between the x-discs 27, 28, at identical distances from a plane in which the x-discs 27, 28 are positioned.
  • the line along which this centre plane and a centre plane extending between the y-discs 43, 44 intersect, constitutes a reference line for the longitudinal axis 22 of the funnel 5.
  • the x-position of the y-discs 43, 44 is approximately halfway between the tilting axis 36 of the frame 33 and the free side 38 of the frame 33.
  • this contributes to an accurate positioning of the funnel 5, as in this way it is assured that during insertion of the funnel 5 into the positioning device 21, the funnel 5 is able to move the y-discs 43, 44 until it contacts the x-discs 27, 28. It will be understood that should the tension of the spring 39 be too high, the funnel 5 will only be supported by the y-discs 43, 44, which is undesirable.
  • the luminescent phosphor elements on the display screen 14 extend in the y-direction, so that the position of the funnel 5 would still relate to the same phosphor element in the pattern of phosphor elements in case of a slight deviation in the y-direction, whereas the position of the funnel 5 would relate to another phosphor element in the pattern of phosphor elements in case of a slight deviation in the x-direction.

Landscapes

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

Abstract

La présente invention concerne un dispositif de positionnement utilisé pour positionner un entonnoir de tube à rayons cathodiques. Le dispositif de positionnement comprend deux disques x fixés (27, 28) qui sont placés en haut d'un bloc récepteur et deux disques y mobiles (43, 44) qui sont placés dans un cadre. Sur un côté, le cadre peut être incliné autour d'un axe de basculement, alors que sur un autre côté, le cadre est couplé au bloc récepteur au moyen d'un ressort hélicoïdal (39). Lors de l'introduction d'un entonnoir (5) dans le dispositif de positionnement, l'entonnoir bute d'abord contre les disques y mobiles puis contre les disques x fixes. De cette manière, le calage et le support de l'entonnoir par les disques x et par les disques y est assuré, ceci permettant de positionner l'entonnoir de manière appropriée.
PCT/IB2003/002397 2002-06-27 2003-06-12 Dispositif de positionnement pour un entonnoir de tube à rayons cathodiques WO2004003956A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003233137A AU2003233137A1 (en) 2002-06-27 2003-06-12 Positioning device for a funnel for a cathode ray tube

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP02077551 2002-06-27
EP02077551.6 2002-06-27

Publications (1)

Publication Number Publication Date
WO2004003956A1 true WO2004003956A1 (fr) 2004-01-08

Family

ID=29797235

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2003/002397 WO2004003956A1 (fr) 2002-06-27 2003-06-12 Dispositif de positionnement pour un entonnoir de tube à rayons cathodiques

Country Status (2)

Country Link
AU (1) AU2003233137A1 (fr)
WO (1) WO2004003956A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013120261A1 (fr) 2012-02-16 2013-08-22 Jhou Wen-San Dispositif de compression d'air monté sur un véhicule

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3826047A (en) * 1972-02-28 1974-07-30 Rca Corp Device for mounting and orienting a workpiece
US3962764A (en) * 1975-01-15 1976-06-15 Rca Corporation Method of installing a mount assembly in a multi-beam cathode ray tube
WO2001080274A1 (fr) * 2000-04-12 2001-10-25 Koninklijke Philips Electronics N.V. Systeme de positionnement d'un cone a base rectangulaire pour tube a rayons cathodiques (crt)
US6406359B1 (en) * 1999-06-01 2002-06-18 Applied Materials, Inc. Apparatus for transferring semiconductor substrates using an input module

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3826047A (en) * 1972-02-28 1974-07-30 Rca Corp Device for mounting and orienting a workpiece
US3962764A (en) * 1975-01-15 1976-06-15 Rca Corporation Method of installing a mount assembly in a multi-beam cathode ray tube
US6406359B1 (en) * 1999-06-01 2002-06-18 Applied Materials, Inc. Apparatus for transferring semiconductor substrates using an input module
WO2001080274A1 (fr) * 2000-04-12 2001-10-25 Koninklijke Philips Electronics N.V. Systeme de positionnement d'un cone a base rectangulaire pour tube a rayons cathodiques (crt)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013120261A1 (fr) 2012-02-16 2013-08-22 Jhou Wen-San Dispositif de compression d'air monté sur un véhicule

Also Published As

Publication number Publication date
AU2003233137A1 (en) 2004-01-19

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