EP0693767A1 - Device for vacuum-tight sealing of electron tubes - Google Patents

Device for vacuum-tight sealing of electron tubes Download PDF

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Publication number
EP0693767A1
EP0693767A1 EP95109961A EP95109961A EP0693767A1 EP 0693767 A1 EP0693767 A1 EP 0693767A1 EP 95109961 A EP95109961 A EP 95109961A EP 95109961 A EP95109961 A EP 95109961A EP 0693767 A1 EP0693767 A1 EP 0693767A1
Authority
EP
European Patent Office
Prior art keywords
vacuum
melting
heating coil
pump system
component
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.)
Granted
Application number
EP95109961A
Other languages
German (de)
French (fr)
Other versions
EP0693767B1 (en
Inventor
Armin Blecker
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.)
Pfeiffer Vacuum GmbH
Original Assignee
Balzers Pfeiffer GmbH
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 Balzers Pfeiffer GmbH filed Critical Balzers Pfeiffer GmbH
Publication of EP0693767A1 publication Critical patent/EP0693767A1/en
Application granted granted Critical
Publication of EP0693767B1 publication Critical patent/EP0693767B1/en
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
    • 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
    • H01J9/38—Exhausting, degassing, filling, or cleaning vessels
    • 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
    • H01J9/40—Closing vessels

Definitions

  • the invention relates to a device for vacuum-tight sealing of electron tubes z. B. picture tubes, according to the preamble of the claim.
  • Electron tubes are evacuated using pump systems that are especially suitable for the respective production process.
  • Glass-coated tubes are usually connected to the pump systems by glass tubes. After the evacuation, these glass tubes, called pump stems in technical terms, are separated from the pump system by melting. The part of the pump stem facing the tube remains part of the tube base on which inner components of the tube are mounted.
  • a device is used for melting, which is referred to as a melting unit.
  • This melting unit consists of several parts, which have been assembled in the axial direction since Fig. 1:
  • An electron tube 1 is evacuated by a pump system 2.
  • the connection between the electron tube and the pump system takes place via a tubular component 4, the pump stem.
  • the tube base 16 and the pump system 2 must be arranged close together.
  • the melting unit 5 is located between the tube base 16 and the pump system 2. This consists of a housing 6 with a cover 8, various insulation elements 9, 10, 11 and the heating coil 6. To change the heating coil, the melting unit must be removed. This is done in the axial direction after loosening the screws 12.
  • the very narrow axial construction and attachments 3 which are necessary for the aforementioned reasons and which are necessary for the treatment of the electron tube and its components during the pumping out process make the disassembly extremely laborious and time-consuming.
  • the heating coil is a thermally highly stressed part and is therefore exposed to great wear. This means that this component must be replaced frequently. For series production, the replacement of these components and other maintenance work is an essential factor in terms of effort and time. A faster and more efficient course of this production process is desirable. As has been shown above, this is only unsatisfactorily solved with the conventional construction.
  • the invention has set itself the task of designing the melting unit so that the replacement of the heating coil and other maintenance work can be carried out without great effort in time and costs in the context of series production.
  • the construction according to the invention makes it possible to disassemble and re-assemble the melting unit in the radial direction in a simple manner without tools for changing the heating coil.
  • the invention is explained using the example of electron tubes, but is not limited to the vacuum-tight sealing of electron tubes, but relates to all containers which are permanently sealed in a vacuum-tight manner by melting.
  • the melting unit is constructed in such a way that it no longer has to be dismantled in the axial direction. It consists of the housing 13, which comprises the heating coil 6 and the insulation elements in the axial direction. A component 14 of the housing 13 is laterally removable. With this component, the heating coil 6 and the insulation elements can also be removed without screw connections having to be loosened. By a locking element 15, for. B. a spring, which is released before removing the component 14, the entire melting unit is held together.

Landscapes

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

Abstract

The device has a vacuum pump system (2), for evacuating the interior of the electron tube (1), which is coupled to the vacuum pump system via a connection element (4), before melting to form a vacuum-tight seal. The melting is effected by a melting system (5) with an electric heating coil (6), enclosed both radially and axially by a housing (13) which has a component (14) which can be removed from the side, together with the heating coil. The removable housing component is secured in place by a spring (15). <IMAGE>

Description

Die Erfindung betrifft eine Einrichtung zum vakuumdichten Verschließen von Elektronenröhren z. B. Bildwiedergaberöhren, nach dem Oberbegriff des Patentanspruches.The invention relates to a device for vacuum-tight sealing of electron tubes z. B. picture tubes, according to the preamble of the claim.

Die Evakuierung von Elektronenröhren erfolgt durch speziell für den jeweiligen Produktionsprozess geeignete Pumpsysteme. Röhren mit Glasumhüllung werden in der Regel durch Glasrohre mit den Pumpsystemen verbunden. Diese Glasrohre, in der Fachsprache Pumpstengel genannt, werden nach der Evakuierung durch Abschmelzen vom Pumpsystem getrennt. Der der Röhre zugewandte Teil des Pumpstengels bleibt Bestandteil des Röhrenfußes, auf dem innere Bauteile der Röhre montiert sind. Für die Serienfertigung wird zum Abschmelzen eine Vorrichtung verwendet, welche als Abschmelzeinheit bezeichnet wird.Electron tubes are evacuated using pump systems that are especially suitable for the respective production process. Glass-coated tubes are usually connected to the pump systems by glass tubes. After the evacuation, these glass tubes, called pump stems in technical terms, are separated from the pump system by melting. The part of the pump stem facing the tube remains part of the tube base on which inner components of the tube are mounted. For series production, a device is used for melting, which is referred to as a melting unit.

Diese Abschmelzeinheit besteht aus mehreren Teilen, welche seither entsprechend der Abb. 1 in axialer Richtung zusammenmontiert sind:This melting unit consists of several parts, which have been assembled in the axial direction since Fig. 1:

Eine Elektronenröhre 1, wird durch ein Pumpsystem 2 evakuiert. Die Verbindung zwischen Elektronenröhre und Pumpsystem erfolgt über ein rohrförmiges Bauelement 4, den Pumpstengel. Um den Leitwert in dem Pumpstengel möglichst groß zu halten und somit die Auspumpzeit auf ein Minimum zu begrenzen, muß dieser so kurz wie möglich sein. Dies bedeutet, daß der Röhrensockel 16 und das Pumpsystem 2 dicht beieinander angeordnet sein müssen. Zwischen dem Röhrensockel 16 und dem Pumpsystem 2 befindet sich die Abschmelzeinheit 5. Diese besteht aus einem Gehäuse 6 mit Deckel 8, verschiedenen Isolationselementen 9, 10, 11 und der Heizwendel 6. Zum Wechseln der Heizwendel muß die Abschmelzeinheit demontiert werden. Dies geschieht in axialer Richtung nach Lösen der Schrauben 12. Die aus vorgenannten Gründen bedingte sehr enge axiale Bauweise und Anbauten 3, welche zur Behandlung der Elektronenröhre und deren Bauteile während des Auspumpprozesses notwendig sind machen die Demontage äußert umständlich und zeitraubend.An electron tube 1 is evacuated by a pump system 2. The connection between the electron tube and the pump system takes place via a tubular component 4, the pump stem. In order to keep the conductivity in the pump stem as large as possible and thus limit the pumping time to a minimum, it must be as short as possible. This means that the tube base 16 and the pump system 2 must be arranged close together. The melting unit 5 is located between the tube base 16 and the pump system 2. This consists of a housing 6 with a cover 8, various insulation elements 9, 10, 11 and the heating coil 6. To change the heating coil, the melting unit must be removed. This is done in the axial direction after loosening the screws 12. The very narrow axial construction and attachments 3 which are necessary for the aforementioned reasons and which are necessary for the treatment of the electron tube and its components during the pumping out process make the disassembly extremely laborious and time-consuming.

Die Heizwendel ist ein thermisch hochbelastetes Teil und somit einem großen Verschleiß ausgesetzt. Dadurch ist ein häufiger Wechsel dieses BauteilsI bedingt. Für eine Serienfertigung stellt das Auswechseln dieser Bauteile und andere Wartungsarbeiten einen wesentlichen Faktor in Aufwand und Zeit dar. Ein schneller und rationeller Ablauf dieses Fertigungsvorgangs ist anzustreben. Dies ist, wie oben gezeigt wurde, mit der herkömmlichen Konstruktion nur unbefriedigend gelöst.The heating coil is a thermally highly stressed part and is therefore exposed to great wear. This means that this component must be replaced frequently. For series production, the replacement of these components and other maintenance work is an essential factor in terms of effort and time. A faster and more efficient course of this production process is desirable. As has been shown above, this is only unsatisfactorily solved with the conventional construction.

Die Erfindung hat sich zur Aufgabe gestellt, die Abschmelzeinheit so zu konstruieren, daß im Rahmen einer Serienfertigung das Auswechseln der Heizwendel und andere Wartungsarbeiten ohne großen Aufwand an Zeit und Kosten erfolgen kann.The invention has set itself the task of designing the melting unit so that the replacement of the heating coil and other maintenance work can be carried out without great effort in time and costs in the context of series production.

Diese Aufgabe wird durch den kennzeichnenden Teil des Patentanspruches gelöst. Durch die erfindungsgemäße Konstruktion ist es möglich, die Abschmelzeinheit auf einfache Weise ohne Werkzeuge für den Wechsel der Heizwendel in radialer Richtung zu demontieren und wieder zusammen zu bauen.This object is achieved by the characterizing part of the patent claim. The construction according to the invention makes it possible to disassemble and re-assemble the melting unit in the radial direction in a simple manner without tools for changing the heating coil.

Die Erfindung wird am Beispiel von Elektronenröhren erläutert, ist jedoch nicht auf das vakuumdichte Verschließen von Elektronenröhren beschränkt, sondern bezieht sich auf alle Behälter, welche dauerhaft vakuumdicht durch Abschmelzen verschlossen werden.The invention is explained using the example of electron tubes, but is not limited to the vacuum-tight sealing of electron tubes, but relates to all containers which are permanently sealed in a vacuum-tight manner by melting.

Anhand der Abb. 2 soll die Erfindung näher erläutert werden.The invention will be explained in more detail with reference to FIG. 2.

Bei der erfindungsgemäßen Anordnung ist die Abschmelzeinheit so konstruiert, daß sie nicht mehr in axialer Richtung demontiert werden muß. Sie besteht aus dem Gehäuse 13, welches die Heizwendel 6 und die Isolationselemente in axialer Richtung umfaßt. Ein Bauteil 14 des Gehäuses 13 ist seitlich herausnehmbar. Mit diesem Bauteil sind die Heizwendel 6 und die Isolationselemente ebenfalls herausnehmbar, ohne daß Verschraubungen gelöst werden müssen. Durch ein Arretierelement 15, z. B. eine Feder, welche vor dem Herausnehmen des Bauteils 14 gelöst wird, wird die gesamte Abschmelzeinheit zusammengehalten.In the arrangement according to the invention, the melting unit is constructed in such a way that it no longer has to be dismantled in the axial direction. It consists of the housing 13, which comprises the heating coil 6 and the insulation elements in the axial direction. A component 14 of the housing 13 is laterally removable. With this component, the heating coil 6 and the insulation elements can also be removed without screw connections having to be loosened. By a locking element 15, for. B. a spring, which is released before removing the component 14, the entire melting unit is held together.

Claims (1)

Einrichtung zum vakuumdichten Verschließen von Elektronenröhren mit einem Vakuumpumpsystem (2) einem rohrförmigen Verbindungselement (4) zwischen Elektronenröhre (1) und Vakuumpumpsystem (2), welches nach Evakuierung der Elektronenröhre dauerhaft vakuumdicht durch Abschmelzen verschlossen wird, wobei das Abschmelzen durch eine spezielle Abschmelzeinheit (5) ausgeführt wird und die Abschmelzeinheit mit einer Heizwendel (6) ausgestattet ist, dadurch gekennzeichnet, daß die Heizwendel (6) von einem Gehäuse (13) radial und axial umfaßt wird und ein Bauteil (14) des Gehäuses (13) seitlich herausnehmbar ist, wobei mit dem Bauteil (14) auch die Heizwendel (6) herausnehmbar ist, ohne daß Verschraubungen gelöst werden müssen und daß zur Halterung des Bauteils (14) ein Arreitierelement (15), z. B. eine Feder, vorhanden ist.Device for vacuum-tight sealing of electron tubes with a vacuum pump system (2), a tubular connecting element (4) between the electron tube (1) and vacuum pump system (2), which is permanently sealed in a vacuum-tight manner by melting after the electron tube has been evacuated, the melting using a special melting unit (5 ) is executed and the melting unit is equipped with a heating coil (6), characterized in that the heating coil (6) is surrounded radially and axially by a housing (13) and a component (14) of the housing (13) can be removed from the side, whereby with the component (14) also the heating coil (6) can be removed without screw connections having to be loosened and that an retaining element (15), for. B. a spring is present.
EP95109961A 1994-07-18 1995-06-27 Device for vacuum-tight sealing of permanently vacuum-tight containers Expired - Lifetime EP0693767B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4425160A DE4425160A1 (en) 1994-07-18 1994-07-18 Device for vacuum-tight sealing of electron tubes
DE4425160 1994-07-18

Publications (2)

Publication Number Publication Date
EP0693767A1 true EP0693767A1 (en) 1996-01-24
EP0693767B1 EP0693767B1 (en) 1999-08-25

Family

ID=6523334

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95109961A Expired - Lifetime EP0693767B1 (en) 1994-07-18 1995-06-27 Device for vacuum-tight sealing of permanently vacuum-tight containers

Country Status (7)

Country Link
US (1) US5567193A (en)
EP (1) EP0693767B1 (en)
JP (1) JPH0845430A (en)
KR (1) KR960005674A (en)
CN (1) CN1118513A (en)
DE (2) DE4425160A1 (en)
TW (1) TW265455B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29606349U1 (en) * 1996-04-01 1997-07-31 Porsche Manfred Heater for melting evacuated picture tubes
CN100419940C (en) * 2002-02-28 2008-09-17 有限会社大和电子工业 Open and close type cylindrical heater for glass tube vacuum sealing
CN102324357A (en) * 2011-09-21 2012-01-18 广州威理照明科技有限公司 Sealing-in equipment and method for CMH (Ceramic Metal Halide) light

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3100251A (en) * 1960-10-24 1963-08-06 Gen Electric Tip-off oven

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2278500A (en) * 1941-01-31 1942-04-07 Rca Corp Vacuum tube seal-off
GB854305A (en) * 1957-11-18 1960-11-16 Philco Corp Improvements in and relating to the manufacture of electronic tubes and the like
US3807006A (en) * 1972-10-31 1974-04-30 Rca Corp Method of installing a mount assembly in a multibeam cathode-ray tube
GB1554067A (en) * 1977-01-24 1979-10-17 Badalex Ltd Manufacture of electric light sources
US4451725A (en) * 1982-07-22 1984-05-29 Rca Corporation Electrical heating unit for sealing vacuum electron tubes
JPH06295677A (en) * 1993-04-07 1994-10-21 Sony Corp Cathode-ray tube manufacturing device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3100251A (en) * 1960-10-24 1963-08-06 Gen Electric Tip-off oven

Also Published As

Publication number Publication date
DE4425160A1 (en) 1996-01-25
EP0693767B1 (en) 1999-08-25
JPH0845430A (en) 1996-02-16
US5567193A (en) 1996-10-22
TW265455B (en) 1995-12-11
KR960005674A (en) 1996-02-23
DE59506675D1 (en) 1999-09-30
CN1118513A (en) 1996-03-13

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