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 PDFInfo
- 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
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
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)
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)
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 |
-
2003
- 2003-06-12 WO PCT/IB2003/002397 patent/WO2004003956A1/fr not_active Application Discontinuation
- 2003-06-12 AU AU2003233137A patent/AU2003233137A1/en not_active Abandoned
Patent Citations (4)
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)
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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