EP0286484B1 - Verfahren zum Wickeln einer nichtradialen Windung für eine Kathodenstrahlröhrenablenkeinheit - Google Patents

Verfahren zum Wickeln einer nichtradialen Windung für eine Kathodenstrahlröhrenablenkeinheit Download PDF

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Publication number
EP0286484B1
EP0286484B1 EP88400650A EP88400650A EP0286484B1 EP 0286484 B1 EP0286484 B1 EP 0286484B1 EP 88400650 A EP88400650 A EP 88400650A EP 88400650 A EP88400650 A EP 88400650A EP 0286484 B1 EP0286484 B1 EP 0286484B1
Authority
EP
European Patent Office
Prior art keywords
layer
winding
radial
turns
ferrite
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
EP88400650A
Other languages
English (en)
French (fr)
Other versions
EP0286484A1 (de
Inventor
Jean-Pierre Fourche
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.)
Thomson Tubes and Displays SA
Original Assignee
Thomson Tubes and Displays SA
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 Thomson Tubes and Displays SA filed Critical Thomson Tubes and Displays SA
Publication of EP0286484A1 publication Critical patent/EP0286484A1/de
Application granted granted Critical
Publication of EP0286484B1 publication Critical patent/EP0286484B1/de
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
    • H01J29/46—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
    • H01J29/72—Arrangements for deflecting ray or beam along one straight line or along two perpendicular straight lines
    • H01J29/76—Deflecting by magnetic fields only
    • 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
    • H01J9/236—Manufacture of magnetic deflecting devices for cathode-ray tubes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2209/00—Apparatus and processes for manufacture of discharge tubes
    • H01J2209/236—Manufacture of magnetic deflecting devices
    • H01J2209/2363—Coils
    • H01J2209/2366—Machines therefor, e.g. winding, forming, welding, or the like
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/4902—Electromagnet, transformer or inductor
    • Y10T29/49071—Electromagnet, transformer or inductor by winding or coiling

Definitions

  • the invention relates to a winding method for non-radial winding of a cathode ray tube deflector.
  • Trichrome cathode ray tubes in line with barrels are currently equipped with deflectors themselves realizing the auto-convergence of the electron beams and the corrections of image geometry.
  • the line field, created by saddle-shaped coils, is said to be “positive astigmatism", while the field field is said to be “negative mean astigmastime” to ensure convergence and to “positive forward astigmatism” to ensure geometry correction.
  • the method according to the invention consists in producing a first winding layer at least approximately radially with a large winding pitch, then in depositing the following non-radial layers using at least part of the wires of the first layer to avoid the sliding of the following layers.
  • FIGS. 1 and 2 show exploded front and rear views of the two half-ferrites 1,2 each comprising a half-frame winding 3,4.
  • the wires of the half-windings 3,4 are not arranged radially, that is to say that they are not parallel to the generatrices of the conical surface formed by the half-ferrites 1,2. These wires form with respect to these generators a variable angle of inclination according to the position of the strands of wire within the winding and as a function of the angular position of the notches.
  • plastic parts with notches 5,6 and 7,8 are fixed on the front and rear end faces of each half-ferrite 1,2.
  • the successive turns of the half-windings 3,4 are maintained by these notches, which allows them to be wound with a high angle of inclination.
  • FIGS. 3,4 show two side views, considered at 180 ° relative to each other, of a finished deflector, produced from the elements of FIGS. 1 and 2.
  • FIGS. 5 and 6 show another embodiment of a deflector of the prior art.
  • the winding machine essentially comprises a device 20 for holding and driving in rotation the half-ferrites 21, and a rotary wire guide 22 (better known under the English name of "flyer"), the axis of rotation 23 of which is perpendicular to the axis B of the half-ferrites 21 in the radial winding position.
  • FIG. 7 shows a half-ferrite 21 on which the wire guide 22 is depositing the layer of radial winding 24 at large pitch.
  • the turns of this first layer being substantially radial (that is to say truly radial or inclined by a few degrees), have a stable positioning relative to the portion of conical crown formed by the half-ferrite whose generator is also radial . These turns will be difficult to move when removing the following non-radial layers (or at least for the second layer which guides the following) for which they act as retaining notches.
  • the radial winding and the non-radial winding are carried out with the same wire, without interruption.
  • this pitch is variable: it has a first value P1 at the ends of the layer, and a second value P2, greater than P1, in the middle of the layer.
  • P1 is equal to approximately 2 to 5 times said pitch of winding with contiguous turns
  • P2 is equal to approximately 2 to 3 times P1.
  • the layer 24 must be sufficiently wide, in particular at the rear of the ferrite and protrudes slightly at the front (from 2 to 5 turns approximately) of the following layers, in order to be sure that the extreme turns of the non-radial winding will always be maintained by those of the layer 24 without the need to position with great precision the first turn of the non-radial winding 25 , compared to layer 24.
  • the half-ferrite 21 is inclined around an axis contained in the break plane P (the plane of separation between two half-ferrites formed by breaking of an entire ferrite) .
  • the trace T of this axis (which is perpendicular to the plane of the drawing).
  • B be the axis of the machine (axis around which the machine rotates the half-ferrites to produce the radial windings).
  • the angle I formed by B and P is the angle of inclination of the ferrite.
  • the angles of inclination of the different turns of the non-radial winding 25 depend on the angle I and on the angular position of these turns within the winding.
  • the angular distribution of the different turns of the resulting winding (24 + 25) is the composition of the distribution of the different layers, the effect of the first one being weak insofar as its number of turns is low.
  • the winding pitch of the non-radial layers is greater than that which would have been without the first radial layer, so as to allow the wires of this first layer to be interposed in the turns of the subsequent layers of the winding without disturbing the arrangement too much.
  • the process of the present invention can be implemented when it is desired to obtain a winding whose coverage angle (angle at the center formed by the two extreme turns of the winding, in a plane PA perpendicular to the axis of the ferrite ) front is greater than the rear coverage angle (that is to say for a plane PA passing through the front or rear front face, respectively of the ferrite), and this, with a first radial layer (like said layer 24). After having wound the first layer, the half-ferrite is tilted in a direction opposite to that shown in FIG. 8.
  • This type of winding is useful in particular for producing a self-converging deflector giving an image having good resolution uniformity.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)
  • Coil Winding Methods And Apparatuses (AREA)

Claims (4)

  1. Wicklungsverfahren zur nicht radialen Wicklung der Drähte zur Ausbildung einer Ablenkspule einer Kathodenstrahlröhre, demzurfolge die Ablenkspule der Kathodenstrahlröhre mindestens einen ersten Halbkern (21) aufweist, demzurfolge mindestens der erste Halbkern einen Mittelpunkt der Radien aufweist, wobei das genannte Verfahren die folgenden Schritte umfaßt:
    eine erste Schicht (24) der Wicklung wird gewickelt, die bis zur Mitte näherungsweise radial verlauft und in der Mitte der ersten Schicht einen größeren Schritt aufweist, als an den Enden der genannten Schicht, und
    eine zweite, nicht radiale Schicht (25) wird auf die erste Schicht (24) gewickelt, so daß mindestens ein Teil der Drähte der ersten Schicht das Rutschen der zweiten Schicht verhindert.
  2. Wicklungsverfahren gemäß Patentanspruch 1, demgemäß das Wicklungsverfahren die folgenden Schritte umfaßt:
    eine erste Schicht (24) der Wicklung wird derart gewickelt, daß sie bis zur Mitte näherungsweise radial verläuft;
    eine zweite, nicht radiale Schicht (25) der Spule wird auf die erste Schicht (24) gewickelt, wobei mindestens ein Teil der Drähte der ersten Schicht (24) dazu verwendet wird, das Rutschen der zweiten Schicht (25) zu verhindern, wobei das Wickeln der zweiten Schicht (25) 2 bis 5 Windungen vor dem Ende der ersten Schicht (24) beendet wird.
  3. Ablenkspule einer Kathodenstrahlröhre, bestehend aus:
    einer torischen Wicklung auf einem Kern (21), wobei die genannte Wicklung eine erste, näherungsweise radial auf den genannten Kern (21) gewickelte Schicht aufweist und eine zweite, auf die erste Schicht (24) aufgewickelte Schicht (25), wobei diese zweite Schicht (25) nicht radial verläuft,
    wobei die erste Schicht (24) einen größeren Schritt in der Mitte der Schicht aufweist, als an den Enden.
  4. Ablenkspule einer Kathodenstrahlröhre gemäß Patentanspruch 3, wobei die erste Schicht (24) um 2 bis 5 Windungen über die zweite Schicht (25) hinaussteht.
EP88400650A 1987-03-23 1988-03-18 Verfahren zum Wickeln einer nichtradialen Windung für eine Kathodenstrahlröhrenablenkeinheit Expired - Lifetime EP0286484B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8703992A FR2613128B1 (fr) 1987-03-23 1987-03-23 Procede de bobinage pour bobinage non radial de deviateur de tube cathodique
FR8703992 1987-03-23

Publications (2)

Publication Number Publication Date
EP0286484A1 EP0286484A1 (de) 1988-10-12
EP0286484B1 true EP0286484B1 (de) 1993-09-15

Family

ID=9349304

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88400650A Expired - Lifetime EP0286484B1 (de) 1987-03-23 1988-03-18 Verfahren zum Wickeln einer nichtradialen Windung für eine Kathodenstrahlröhrenablenkeinheit

Country Status (7)

Country Link
US (1) US5165614A (de)
EP (1) EP0286484B1 (de)
JP (1) JP2950828B2 (de)
KR (1) KR960008603B1 (de)
CN (2) CN1020059C (de)
DE (1) DE3884035T2 (de)
FR (1) FR2613128B1 (de)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2942980B1 (fr) * 2009-03-13 2011-04-08 Amada Europ Presse plieuse pour le pliage de feuilles
US9210999B2 (en) 2010-06-02 2015-12-15 Steelcase Inc. Frame type table assemblies
US8667908B2 (en) 2010-06-02 2014-03-11 Steelcase Inc. Frame type table assemblies
US9185974B2 (en) 2010-06-02 2015-11-17 Steelcase Inc. Frame type workstation configurations
US8534752B2 (en) 2010-06-02 2013-09-17 Steelcase Inc. Reconfigurable table assemblies
US12376677B1 (en) 2012-10-10 2025-08-05 Steelcase Inc. Ergonomic seating system, tilt-lock control and remote powering method and apparatus
WO2017197395A1 (en) 2016-05-13 2017-11-16 Steelcase Inc. Multi-tiered workstation assembly
US10517392B2 (en) 2016-05-13 2019-12-31 Steelcase Inc. Multi-tiered workstation assembly

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2757073A (en) * 1953-03-31 1956-07-31 Du Pont Process for making pulverulent silica powder
US3299379A (en) * 1962-10-22 1967-01-17 Muter Company Deflection yoke
FR2481002A1 (fr) * 1980-04-22 1981-10-23 Videocolor Procede et machine de bobinage permettant de realiser un bobinage ameliore notamment des bagues de deviation pour tubes cathodiques
JPS58133744A (ja) * 1982-02-03 1983-08-09 Mitsubishi Electric Corp トロイダル形偏向コイルの製造方法
US4469285A (en) * 1982-09-01 1984-09-04 Universal Manufacturing Co., Inc. Coil winding machine with multi-axis positioning for winding television deflection coils
US4511871A (en) * 1983-07-18 1985-04-16 Rca Corporation Modified deflection yoke coils having shootback windings

Also Published As

Publication number Publication date
KR880011874A (ko) 1988-10-31
CN1067137A (zh) 1992-12-16
CN1020059C (zh) 1993-03-10
JPS6471033A (en) 1989-03-16
FR2613128B1 (fr) 1989-05-26
US5165614A (en) 1992-11-24
KR960008603B1 (ko) 1996-06-28
CN88100317A (zh) 1988-10-05
JP2950828B2 (ja) 1999-09-20
CN1021714C (zh) 1993-07-28
DE3884035D1 (de) 1993-10-21
EP0286484A1 (de) 1988-10-12
FR2613128A1 (fr) 1988-09-30
DE3884035T2 (de) 1994-02-24

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