EP0074891B1 - Dispositif de mise en place et de fixation de l'unité de correction des convergences statiques sur le col d'un tube de télévision en couleur - Google Patents

Dispositif de mise en place et de fixation de l'unité de correction des convergences statiques sur le col d'un tube de télévision en couleur Download PDF

Info

Publication number
EP0074891B1
EP0074891B1 EP82401633A EP82401633A EP0074891B1 EP 0074891 B1 EP0074891 B1 EP 0074891B1 EP 82401633 A EP82401633 A EP 82401633A EP 82401633 A EP82401633 A EP 82401633A EP 0074891 B1 EP0074891 B1 EP 0074891B1
Authority
EP
European Patent Office
Prior art keywords
neck
tube
ring
collars
correction unit
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
Application number
EP82401633A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0074891A1 (fr
Inventor
Adriano Venturi
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.)
Videocolor SA
Original Assignee
Videocolor 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 Videocolor SA filed Critical Videocolor SA
Publication of EP0074891A1 publication Critical patent/EP0074891A1/fr
Application granted granted Critical
Publication of EP0074891B1 publication Critical patent/EP0074891B1/fr
Expired 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
    • H01J29/82—Mounting, supporting, spacing, or insulating electron-optical or ion-optical arrangements
    • H01J29/823—Mounting, supporting, spacing, or insulating electron-optical or ion-optical arrangements around the neck of the tube
    • H01J29/826—Deflection arrangements

Definitions

  • the present invention relates to a device for installing and fixing the static convergence correction unit on the neck of a color television tube.
  • This adjustment is ensured in a conventional manner by the static convergence correction unit which is constituted by several small magnets whose magnetic fields which interfere make it possible to carry out the desired adjustment.
  • This correction unit is usually placed just behind the tube deflection block. Its positioning on the tube, its precise positioning and the adjustment and maintenance operations associated therewith pose delicate problems which the invention makes it possible to solve in a simple and economical manner.
  • the static convergence correction unit could comprise various adjustable unit elements which were fixed, for example glued, behind the deflection block of the tube. Such a process is long, difficult to industrialize and does not allow adjustments to be made flexibly.
  • a ring usually made of a plastic material loaded with ferrite is placed behind the deflection block which can be magnetized in the most suitable way to obtain the desired static convergence corrections.
  • This ring can be split, and in this case, its attachment to the neck of the tube is ensured by tightening by means of an external metal collar.
  • the adjustment operations are not very easy because the magnetization of the ring cannot be done with the metal fixing collar in place.
  • the fact that the ring is split also introduces an air gap unfavorable for a good adjustment.
  • the ring of plastic material loaded with ferrite is not split, which eliminates the problem of the air gap.
  • this introduces a problem difficult to solve of precise positioning of this ring on the neck of the tube, taking into account the manufacturing tolerances in particular of the glass of the tube and of the relatively large and variable clearance existing between the walls of the neck of the tube and of the static convergence correction unit.
  • This axial play is unfavorable both at the level of the realization of the adjustment and at the level of the fixing of the ring on the neck of the tube.
  • patent BE-A-528,230 where the neck of the tube has two annular protuberances over which slides a sleeve carrying the concentration magnet. Mention may also be made of patent FR-A-2 306 522 in which the correction ring comprises an annular support of synthetic material outside of which the correction magnet is disposed.
  • the present invention relates to a device for installing and fixing the static convergence correction unit on the neck of a color television tube, of the type comprising a body interlayer between the neck of the tube and said static convergence correction unit, said correction unit essentially consisting of a closed cylindrical ring made of plastic loaded with ferrite, which ring has an inside diameter D 3 slightly greater than the outside diameter D 2 of the neck 1 of the tube which it must equip, characterized in that it comprises at least one and preferably two elastic collars 7, 8 made of heat-resistant elastomeric material such as silicone rubber which are arranged in extension around the neck of the tube and have a reduced thickness section, that is to say one to two millimeters, the said elastic collar (s) being compressed by the wall of said positioned unit on the collar over the said collar (s).
  • the desired magnetization of the static convergence correction unit is carried out when the latter is in place on the neck of the tube, which facilitates the operation and makes it easily industrializable.
  • the device according to the invention comprises a static convergence correction unit essentially composed of a closed plastic cylindrical ring loaded with ferrite of diameter less than slightly greater than the outside diameter of the neck of the tube which it must equip, at least one and preferably two elastic collars made of heat-resistant elastomeric material such as silicone rubber having in the rest state a diameter less than the outside diameter of the neck and a section of reduced thickness about one to two millimeters, said device, in the mounting position on the tube, comprising said unit positioned on the neck over said elastic collars compressed between the facing walls of said unit and said neck.
  • FIG. 1 we see the rear part or neck 1 of a color television tube 2 on which we just mounted in any known manner the deflection block 3 whose outer contour has been shown in dotted lines in the figure and of which we have identified in FIGS. 2 and 3 only the rear face 4 against which we have mounted the static convergence correction unit slightly in front of the barrels (not shown) located at inside of the collar at the rear end of the latter.
  • the letters AR mark the rear direction with respect to the front direction marked AV of the tube whose axis has been marked 5.
  • a closed cylindrical ring 6 known per se which can be seen in particular in FIGS. 2 and 4 is used as the static convergence correction unit.
  • This ring is advantageously made of a suitable quality plastic material loaded with ferrite, so that you can create the desired polar magnetic elements to obtain the desired magnetic static convergence correction.
  • two elastic rings or elastic collars of appropriate quality marked 7 and 8 are engaged on the neck 1, behind the deflection block 3, two elastic rings or elastic collars of appropriate quality marked 7 and 8 are engaged.
  • the dimensions of these rings are such that their diameter D 1 (FIG. 5) is state of rest significantly lower than the outside diameter D 2 of a tube neck.
  • D 1 of the collars 7 and 8 may be of the order of 13 to 26 millimeters.
  • the collars 7 and 8 are positioned on the neck 1 in extension and remain in place of themselves.
  • the mean diameter D 2 of the neck 1 of the tube is 29 millimeters
  • an average inner diameter of the ring 6 of 30 millimeters, which gives a diametral mean clearance of 1 millimeter making it possible to absorb the tolerances normal manufacturing.
  • a thickness d of the section of the collars of the order of 1.5 to 2 millimeters, so as to obtain sufficient crushing of these collars during the positioning of the correction unit. static convergences 6.
  • the manufacturing tolerances of the tubes are greater than a millimeter for the value of the diameter of the neck, it will be possible to provide a set of several correction rings 6 having diameters ranging from millimeter to millimeter and l 'We will adapt each time on the neck of the tube the ring of the most suitable dimension, that is to say of the diameter D 3 the smallest but greater than the diameter D 2 of the tube.
  • the collars 7, 8 may be standard collars.
  • the normal thickness e of the ring 6 can be of the order of 1.5 millimeters or more, while the axial length L of the ring varies depending on the type of tube fitted.
  • the ring 6 is put in place on the neck 1 of the tube as illustrated in FIG. 2 before magnetization of this ring.
  • the static convergence correction is then obtained definitively and there is no longer any subsequent operation for fixing the ring 6.
  • FIG. 3 An additional advantage of the invention as illustrated in FIG. 3 results from the fact that it is optionally possible to adapt over the ring 6 an additional correction ring 9 which can be fixed in a conventional manner like a non-magnetic clamp. around this ring.
  • the collar 9 may for example carry small correction magnets.
  • these collars may have a circular section as illustrated.
  • they can be given an elliptical or even rectangular or square section, although the provision of rounded angle sections will generally facilitate the introduction and proper positioning of the ring 6 over the collars.
  • two collars will be used, placed at a distance from each other slightly less than the length L of the ring 6, making it possible to obtain perfect results.

Landscapes

  • Video Image Reproduction Devices For Color Tv Systems (AREA)
EP82401633A 1981-09-16 1982-09-07 Dispositif de mise en place et de fixation de l'unité de correction des convergences statiques sur le col d'un tube de télévision en couleur Expired EP0074891B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8117520A FR2513010A1 (fr) 1981-09-16 1981-09-16 Procede et dispositif de mise en place et de fixation de l'unite de correction des convergences statiques sur le col d'un tube de television en couleur
FR8117520 1981-09-16

Publications (2)

Publication Number Publication Date
EP0074891A1 EP0074891A1 (fr) 1983-03-23
EP0074891B1 true EP0074891B1 (fr) 1986-05-07

Family

ID=9262202

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82401633A Expired EP0074891B1 (fr) 1981-09-16 1982-09-07 Dispositif de mise en place et de fixation de l'unité de correction des convergences statiques sur le col d'un tube de télévision en couleur

Country Status (9)

Country Link
US (1) US4453921A (enrdf_load_stackoverflow)
EP (1) EP0074891B1 (enrdf_load_stackoverflow)
JP (1) JPS5859538A (enrdf_load_stackoverflow)
DE (1) DE3271009D1 (enrdf_load_stackoverflow)
ES (1) ES8306920A1 (enrdf_load_stackoverflow)
FR (1) FR2513010A1 (enrdf_load_stackoverflow)
HK (1) HK94189A (enrdf_load_stackoverflow)
PT (1) PT75485B (enrdf_load_stackoverflow)
SG (1) SG29489G (enrdf_load_stackoverflow)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5568010A (en) * 1995-11-16 1996-10-22 Philips Electronics North America Corporation Cathode ray tube with improved yoke clamp
TR200400947T4 (tr) * 2000-09-12 2004-07-21 Thomson Licensing, S.A. Statik elektron ışını iniş hatasını düzeltmek için aygıt
JP4901946B2 (ja) * 2009-12-16 2012-03-21 株式会社牧野フライス製作所 滑り案内装置

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2456399A (en) * 1945-10-24 1948-12-14 Gen Electric Cathode-ray apparatus
US2544875A (en) * 1950-03-02 1951-03-13 Pye Ltd Combination centering, focusing, and deflecting device for beam of cathode-ray tubes
US2643373A (en) * 1950-07-21 1953-06-23 Tele King Corp Mounting of cathode-ray tubes for television reception
BE528230A (enrdf_load_stackoverflow) * 1953-04-21
NL170683C (nl) * 1975-04-01 1982-12-01 Philips Nv Werkwijze voor het vervaardigen van een statische convergentie-eenheid en een kleurenbeeldbuis voorzien van een convergentie-eenheid, vervaardigd onder toepassing van die werkwijze.
US4030126A (en) * 1976-01-16 1977-06-14 Gte Sylvania Incorporated Support means for a CRT beam adjustment device
JPS55137650A (en) * 1979-04-16 1980-10-27 Ricoh Co Ltd Cathode ray tube-focusing phototransmission unit array mounting construction
US4261017A (en) * 1979-12-27 1981-04-07 Rca Corporation Electron beam influencing apparatus
US4338584A (en) * 1980-11-24 1982-07-06 Rca Corporation Television deflection yoke mount

Also Published As

Publication number Publication date
SG29489G (en) 1991-01-04
US4453921A (en) 1984-06-12
PT75485B (fr) 1984-10-29
HK94189A (en) 1989-12-08
ES515727A0 (es) 1983-06-01
ES8306920A1 (es) 1983-06-01
PT75485A (fr) 1982-09-01
JPS5859538A (ja) 1983-04-08
EP0074891A1 (fr) 1983-03-23
FR2513010A1 (fr) 1983-03-18
DE3271009D1 (en) 1986-06-12
FR2513010B1 (enrdf_load_stackoverflow) 1983-10-21

Similar Documents

Publication Publication Date Title
FR2702881A1 (fr) Tube cathodique en couleurs contenant un masque perforé dans lequel sont ménagés des trous disposés selon un pas qui ne diminue pas de façon monotone.
CA1271180A (fr) Robinet a papillon a caractere universel et procede de fabrication dudit robinet
EP0074891B1 (fr) Dispositif de mise en place et de fixation de l'unité de correction des convergences statiques sur le col d'un tube de télévision en couleur
FR2702812A1 (fr) Ensemble de soupape d'obturation pour un amortisseur, d'un montage simplifié.
FR2757681A1 (fr) Systeme de deviation pour tube a rayons cathodiques adapte au controle de la geometrie nord/sud de l'image
EP0107987B2 (fr) Procédé de transformation d'un déviateur permettant son utilisation pour des tubes à images autoconvergents de dimensions différentes et déviateur ainsi obtenu
EP0797284B1 (fr) Rotor magnétoélectrique à griffes, procédé de fabrication d'un tel rotor
FR3080154A1 (fr) Procede de fabrication d'un propulseur electrique
FR2606550A1 (fr) Procede et dispositif pour le reglage de la convergence statique et/ou de la purete d'un tube de television en couleurs
CA2018741C (fr) Rouleau conducteur de courant
EP0690471B1 (fr) Système de déviation des faisceaux électroniques pour tube à rayons cathodiques
FR2476909A1 (fr) Dispositif de compensation dans un televiseur en couleur, pour ameliorer la convergence
FR2689678A1 (fr) Procédé de positionnement d'un déviateur sur le col d'un tube à rayons cathodiques et dispositif mettant en Óoeuvre le procédé.
EP0286484A1 (fr) Procédé de bobinage pour bobinage non radial de déviateur de tube cathodique
EP0821388A1 (fr) Dispositif de fixation d'un déviateur sur le col d'un tube à rayons cathodiques
FR2766612A1 (fr) Deviateur pour tube a rayons cathodiques a geometrie et convergence ameliorees
FR2489641A1 (fr) Culasse de deviation autoconvergente, procede d'enroulement et appareil pour la mise en oeuvre du procede
FR2797993A1 (fr) Unite de deflexion pour tube a rayons cathodiques comportant des bobines de deviation verticales en forme de selle
EP0636415A1 (fr) Plaque de blindage à clavettes sphériques pour broyeur à boulets
EP0284491B1 (fr) Tube de télévision en couleurs à déviateur de faible consommation
FR2778016A1 (fr) Unite de deflexion pour tubes a rayons cathodiques couleur comportant des bobines asymetriques
FR2795231A1 (fr) Dispositif de deflexion pour tube a rayons cathodiques
FR2481842A1 (fr) Perfectionnements a un deviateur a profil allonge notamment pour tubes a rayons cathodiques
EP0794551A1 (fr) Système de déviation des faisceaux électroniques pour tube à rayons cathodiques
EP2960921A1 (fr) Ensemble autocentré pour ampoule à vide et ampoule à vide

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): BE DE GB IT LU NL

17P Request for examination filed

Effective date: 19830415

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): BE DE GB IT LU NL

ITF It: translation for a ep patent filed
REF Corresponds to:

Ref document number: 3271009

Country of ref document: DE

Date of ref document: 19860612

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19860930

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19870930

Year of fee payment: 6

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Effective date: 19890930

BERE Be: lapsed

Owner name: VIDEOCOLOR

Effective date: 19890930

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19900401

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19940831

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19940901

Year of fee payment: 13

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19950907

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19950907

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19960601