EP0061103A2 - Tube d'image avec protecteur - Google Patents

Tube d'image avec protecteur Download PDF

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Publication number
EP0061103A2
EP0061103A2 EP82102035A EP82102035A EP0061103A2 EP 0061103 A2 EP0061103 A2 EP 0061103A2 EP 82102035 A EP82102035 A EP 82102035A EP 82102035 A EP82102035 A EP 82102035A EP 0061103 A2 EP0061103 A2 EP 0061103A2
Authority
EP
European Patent Office
Prior art keywords
inhomogeneities
picture tube
cone
tube according
circumference
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.)
Withdrawn
Application number
EP82102035A
Other languages
German (de)
English (en)
Other versions
EP0061103A3 (fr
Inventor
Lothar Schmeller
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.)
Alcatel Lucent Deutschland AG
International Standard Electric Corp
Original Assignee
Alcatel SEL AG
Standard Elektrik Lorenz AG
International Standard Electric 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 Alcatel SEL AG, Standard Elektrik Lorenz AG, International Standard Electric Corp filed Critical Alcatel SEL AG
Publication of EP0061103A2 publication Critical patent/EP0061103A2/fr
Publication of EP0061103A3 publication Critical patent/EP0061103A3/fr
Withdrawn legal-status Critical Current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
    • H01J29/87—Arrangements for preventing or limiting effects of implosion of vessels or containers

Definitions

  • the invention relates to a picture tube with a protective device for picture tubes from the screen, cone and neck.
  • DE-OS 28 55 732 it is proposed in DE-OS 28 55 732 to reduce the resistance to the impact of splinters by a ring of predetermined breaking points around the cone part, and thus to eliminate the risk of reflection, so that no screen splinters are thrown back onto the viewer side.
  • this measure affects the implosion process only late, when splinters of the screen hit the cone wall from the inside. It is therefore an object of the invention to provide a more effective way of reducing risk.
  • the course of the implosion is influenced right from the start, by the inhomogeneities attached to the neck cone transition as a result of the energy accumulation when impacts that endanger the tube are triggered there.
  • Such a crack propagates immediately to the tube neck and thus leads to relatively safe ventilation of the tube.
  • inhomogeneities In order to keep sub-critical undesirable crack growth in an inhomogeneity with certainty, it is expedient to apply inhomogeneities to those locations which are largely statically free of tensile stress on a tube.
  • the zones of transition from the neck to the cone and from the cone to the screen are less resistant, so that it is expedient for the inhomogeneities to be at least as long as the length of their circumference away from the cylindrical part of the neck and the connecting seam between the screen and the cone.
  • the inhomogeneities should be limited so that a maximum gradient of the internal stresses can occur at their limit, which is why the inhomogeneities consist of combinations of linear depressions and / or elevations of the glass wall, i.e. I-, T-, V-, Y- or Are X-shaped.
  • Such inhomogeneities can be realized by e.g. metallic inclusions in the glass wall or they are represented in that they are ground or cut into the conical glass wall inside or outside or are introduced as thermally or chemically impressed internal glass stresses.
  • the length of this depression was approximately 20 mm.
  • the implosion of a picture tube is comparatively harmless if at least at the same time, but possibly earlier than in other places, cracks develop at the neck cone transition. Then the vacuum in the tube is reduced from the back, before the fragments of the windshield are accelerated by strong air penetration.
  • the invention therefore makes use of the inhomogeneities shown in FIGS. 1 to 4, which serve to convert the impact energy introduced into the glass body upon impact at the desired point in the cone into internal stresses in the glass wall. It is essential to create an effective reflection.
  • the obstacle can be designed as a mass surplus, lack of mass and form deviation. If it is represented by the inclusion of a foreign body, there is an additional advantage if the thermal expansion of the inclusion is selected so that when the tube is overheated, internal stresses also arise at the inhomogeneity in the cone tip, which initiates the implosion at the desired location . It is also possible according to FIG. to solder on. 1 to 4 can be taken on the inside or outside wall of the tube.

Landscapes

  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
EP82102035A 1981-03-20 1982-03-13 Tube d'image avec protecteur Withdrawn EP0061103A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813110930 DE3110930A1 (de) 1981-03-20 1981-03-20 Bildroehre mit schutzeinrichtung
DE3110930 1981-03-20

Publications (2)

Publication Number Publication Date
EP0061103A2 true EP0061103A2 (fr) 1982-09-29
EP0061103A3 EP0061103A3 (fr) 1982-12-08

Family

ID=6127821

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82102035A Withdrawn EP0061103A3 (fr) 1981-03-20 1982-03-13 Tube d'image avec protecteur

Country Status (5)

Country Link
EP (1) EP0061103A3 (fr)
JP (1) JPS57197735A (fr)
CA (1) CA1186364A (fr)
DE (1) DE3110930A1 (fr)
FI (1) FI820937L (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1244131A1 (fr) * 2001-03-22 2002-09-25 Schott Glas Tube à rayons cathodique

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2407527B2 (de) * 1974-02-16 1976-01-08 Jenaer Glaswerk Schott & Gen., 6500 Mainz Elektronenstrahlröhrenkolben mit rechteckigem Bildschirm
DE2039504B2 (de) * 1970-06-08 1979-06-13 Owens-Illinois, Inc., Toledo, Ohio (V.St.A.) Glaskolben für eine Weltwinkel-Fernsehbildröhre
DE2855732A1 (de) * 1977-12-27 1979-06-28 Rca Corp Kathodenstrahlroehre
US4245255A (en) * 1979-04-13 1981-01-13 Corning Glass Works Implosion protection for TV tubes

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50123267A (fr) * 1974-03-15 1975-09-27

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2039504B2 (de) * 1970-06-08 1979-06-13 Owens-Illinois, Inc., Toledo, Ohio (V.St.A.) Glaskolben für eine Weltwinkel-Fernsehbildröhre
DE2407527B2 (de) * 1974-02-16 1976-01-08 Jenaer Glaswerk Schott & Gen., 6500 Mainz Elektronenstrahlröhrenkolben mit rechteckigem Bildschirm
DE2855732A1 (de) * 1977-12-27 1979-06-28 Rca Corp Kathodenstrahlroehre
US4245255A (en) * 1979-04-13 1981-01-13 Corning Glass Works Implosion protection for TV tubes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1244131A1 (fr) * 2001-03-22 2002-09-25 Schott Glas Tube à rayons cathodique

Also Published As

Publication number Publication date
JPS57197735A (en) 1982-12-04
FI820937L (fi) 1982-09-21
CA1186364A (fr) 1985-04-30
EP0061103A3 (fr) 1982-12-08
DE3110930A1 (de) 1982-09-30

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Legal Events

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

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AK Designated contracting states

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

PUAL Search report despatched

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RHK1 Main classification (correction)

Ipc: H01J 29/87

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Effective date: 19830513

STAA Information on the status of an ep patent application or granted ep patent

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18W Application withdrawn

Withdrawal date: 19850207

RIN1 Information on inventor provided before grant (corrected)

Inventor name: SCHMELLER, LOTHAR