EP0399306A2 - Tightening and fastening device of heating conductors on electrically heated vacuum furnaces - Google Patents
Tightening and fastening device of heating conductors on electrically heated vacuum furnaces Download PDFInfo
- Publication number
- EP0399306A2 EP0399306A2 EP90108865A EP90108865A EP0399306A2 EP 0399306 A2 EP0399306 A2 EP 0399306A2 EP 90108865 A EP90108865 A EP 90108865A EP 90108865 A EP90108865 A EP 90108865A EP 0399306 A2 EP0399306 A2 EP 0399306A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- guide sleeve
- furnace vessel
- vessel wall
- heating conductor
- sealing
- 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
Links
- 239000004020 conductor Substances 0.000 title claims abstract description 36
- 238000010438 heat treatment Methods 0.000 title claims abstract description 35
- 238000007789 sealing Methods 0.000 claims abstract description 11
- 239000007788 liquid Substances 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- 238000009413 insulation Methods 0.000 claims 1
- 238000006073 displacement reaction Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 229920001296 polysiloxane Polymers 0.000 description 8
- 239000002826 coolant Substances 0.000 description 3
- 239000004744 fabric Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229920002449 FKM Polymers 0.000 description 1
- 229920013648 Perbunan Polymers 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 239000003779 heat-resistant material Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/62—Heating elements specially adapted for furnaces
- H05B3/66—Supports or mountings for heaters on or in the wall or roof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D11/00—Arrangement of elements for electric heating in or on furnaces
- F27D11/02—Ohmic resistance heating
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/02—Details
- H05B3/04—Waterproof or air-tight seals for heaters
Definitions
- the invention relates to a device for sealing and fastening heating conductors to electrically heated vacuum furnaces, in particular aluminum vacuum furnaces.
- the object of the invention is to seal the heating conductors located in the interior of the furnace with their connections through the furnace vessel wall against the outside atmosphere in a vacuum-safe manner and to design the fastening of the heating conductors in such a way that easy replacement is ensured.
- the heating conductors to be sealed and fastened should be led out of the vacuum furnace either on one side or on both sides.
- Claims 2 to 6 relate to advantageous configurations of the sealing and fastening of heating conductors according to the invention.
- a guide sleeve is detachably connected to the jacket of the furnace vessel in order to enable easy removal of the heating conductor in the case of defective heating conductors.
- the guide sleeve made of stainless steel, can be fastened in the furnace vessel wall in such a way that the guide sleeve is provided with an external thread toward the furnace vessel wall side and the opening of the furnace vessel wall provided for receiving the guide sleeve has a corresponding counter thread.
- the guide sleeve can also be used in this way fix the furnace vessel wall so that the guide sleeve is provided with a flange which can be connected to the furnace vessel wall by means of screws.
- a seal is arranged between the guide sleeve and the furnace vessel wall, which achieves its sealing effect by deformation when the guide sleeve is screwed into the furnace vessel wall or when it is screwed onto the furnace vessel wall.
- the seal is made of a silicone material. This material can withstand a continuous temperature of 240 ° C. If higher temperatures are expected, the seal according to the invention is protected by air or liquid cooling, which is to be provided in the guide sleeve.
- an insulating sleeve in the connection area on the furnace vessel wall between the heating conductor and the guide sleeve, which is made of hard glass fabric, for example.
- the insulating sleeve which is located between the guide sleeve and the heating conductor, is provided with a seal made of silicone or another heat-resistant material (e.g. Viton, Perbunan, etc.), which is deformed by a pressure plate when the insulating sleeve is pressed on from the side.
- the pressing is done with the help of a pressure screw, which engages in the guide sleeve and moves the pressure plate.
- the heating conductor can be provided with a coolant circulation device through which a gaseous or liquid coolant is sent.
- the fastening elements are protected by securing means (made of silicone or the like) or coated with such substances.
- FIG. 1 shows the arrangement according to the invention of a heating conductor (1) in the connection area of the furnace wall (2) of a vacuum furnace (not shown in detail).
- the inside of the furnace should be (according to FIG. 1) to the left of the furnace wall (2).
- the electrical connection of the heating conductor on the right half of Fig. 1 has been omitted because of the electr. Connection is not the subject of the invention.
- the heating conductor is surrounded by an insulating sleeve (5) made of, for example, hard glass fabric (HGW).
- HGW hard glass fabric
- a seal (9) is inserted into this insulating sleeve, e.g. is made of silicone.
- the heating conductor (1) is provided with a cooling device (11) through which a liquid or gaseous coolant flows in and out.
- the heating conductor (1) with the insulating sleeve (5) is guided in a stainless steel guide sleeve (3).
- the guide sleeve has a screw thread (14) with which the guide sleeve is screwed into an opening provided in the furnace vessel wall (2).
- a seal (4) made of e.g. Silicone arranged, which is deformed when screwing the guide sleeve (3) into the furnace vessel wall (2) and thereby seals.
- a detachable connection can also be achieved in the manner (not shown) that the guide sleeve is provided with a flange which is connected to the furnace vessel wall by means of screws.
- a silicone seal is placed between the guide sleeve flange and the furnace wall.
- the perfect seal between the insulating sleeve (5) and the heating conductor (1) by deforming the seal (9) is achieved in such a way that by tightening the pressure screw (7) and thereby pushing the pressure plate (6) against a contact surface on the insulating sleeve (5) the insulating sleeve has been moved in the direction of the furnace vessel wall (2).
- Fig. 2 shows an alternative to the displacement device for the insulating sleeve (5) according to Fig. 1.
- the guide sleeve (3) is provided with a flange and the displacement of the insulating sleeve (5) to deform the seal (9) takes place when the Pressure plate (6) against the flange.
- (8) denotes a silicone safety cap for the head of the pressure screw (7). In this way, protection against electrical arcing is guaranteed.
- silicone is used for spraying.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Furnace Details (AREA)
- Resistance Heating (AREA)
Abstract
Description
Die Erfindung betrifft eine Einrichtung zur Abdichtung und Befestigung von Heizleitern an elektrisch beheizten Vakuumöfen, insbesondere Aluminium-Vakuumöfen.The invention relates to a device for sealing and fastening heating conductors to electrically heated vacuum furnaces, in particular aluminum vacuum furnaces.
Aufgabe der Erfindung ist es, bei elektrisch beheizten Vakuumöfen die im Ofeninneren befindlichen Heizleiter mit ihren durch die Ofengefäßwand führenden Anschlüssen gegenüber der Außenatmosphäre vakuumsicher abzudichten und die Befestigung der Heizleiter so zu gestalten, daß ein leichtes Austauschen gewährleistet ist.The object of the invention is to seal the heating conductors located in the interior of the furnace with their connections through the furnace vessel wall against the outside atmosphere in a vacuum-safe manner and to design the fastening of the heating conductors in such a way that easy replacement is ensured.
Die abzudichtenden und zu befestigenden Heizleiter sollen entweder einseitig oder auch beidseitig aus dem Vakuumofen herausgeführt werden.The heating conductors to be sealed and fastened should be led out of the vacuum furnace either on one side or on both sides.
Die Aufgabe wird nach der Erfindung in der Weise gelöst wie es die Merkmale von Anspruch 1 angeben. Die Ansprüche 2 bis 6 betreffen vorteilhafte Ausgestaltungen der erfindungsgemäßen Abdichtung und Befestigung von Heizleitern.The object is achieved according to the invention in the manner in which the features of claim 1 indicate.
Über den elektrischen Anschlußbereich des Heizleiters, d.h. den Bereich außerhalb der Ofengefäßwand, wird eine Führungshülse mit dem Mantelblech des Ofengefäßes lösbar verbunden, um bei defekten Heizleitern eine einfache Demontage des Heizleiters zu ermöglichen.Via the electrical connection area of the heating conductor, i.e. the area outside the furnace vessel wall, a guide sleeve is detachably connected to the jacket of the furnace vessel in order to enable easy removal of the heating conductor in the case of defective heating conductors.
Die Befestigung der Führungshülse, hergestellt aus Edelstahl, in der Ofengefäßwand kann in der Weise erfolgen, daß die Führungshülse zur Ofengefäßwandseite hin mit einem Außengewinde versehen ist und die für die Aufnahme der Führungshülse vorgesehene Öffnung der Ofengefäßwand ein entsprechendes Gegengewinde aufweist. Die Führungshülse läßt sich alternativ aber auch so an der Ofengefäßwand befestigen, daß die Führungshülse mit einem Flansch versehen wird, der mittels Schrauben mit der Ofengefäßwand verbunden werden kann.The guide sleeve, made of stainless steel, can be fastened in the furnace vessel wall in such a way that the guide sleeve is provided with an external thread toward the furnace vessel wall side and the opening of the furnace vessel wall provided for receiving the guide sleeve has a corresponding counter thread. Alternatively, the guide sleeve can also be used in this way fix the furnace vessel wall so that the guide sleeve is provided with a flange which can be connected to the furnace vessel wall by means of screws.
Zwischen Führungshülse und Ofengefäßwand wird eine Dichtung angeordnet, die beim Einschrauben der Führungshülse in die Ofengefäßwand bzw. beim Anschrauben an die Ofengefäßwand durch Verformung ihre Dichtwirkung erreicht.A seal is arranged between the guide sleeve and the furnace vessel wall, which achieves its sealing effect by deformation when the guide sleeve is screwed into the furnace vessel wall or when it is screwed onto the furnace vessel wall.
Die Dichtung wird wegen der auftretenden hohen Temperaturen aus einem Silikon-Werkstoff hergestellt. Dieser Werkstoff hält einer Dauertemperatur von 240 ° C stand. Werden höhere Temperaturen erwartet, so wird die Dichtung nach der Erfindung durch eine Luft- oder Flüssigkeitskühlung, die in der Führungshülse vorzusehen ist, geschützt.Due to the high temperatures that occur, the seal is made of a silicone material. This material can withstand a continuous temperature of 240 ° C. If higher temperatures are expected, the seal according to the invention is protected by air or liquid cooling, which is to be provided in the guide sleeve.
Zur elektrischen Abschirmung des Heizleiters befindet sich im Anschlußbereich an der Ofengefäßwand zwischen Heizleiter und Führungshülse eine Isolierhülse, die beispielsweise aus Hartglasgewebe hergestellt ist.For electrical shielding of the heating conductor, there is an insulating sleeve in the connection area on the furnace vessel wall between the heating conductor and the guide sleeve, which is made of hard glass fabric, for example.
Die Isolierhülse, die sich zwischen Führungshülse und Heizleiter befindet, ist mit einer Dichtung aus Silikon oder einem anderen hitzebeständigen Werkstoff (z.B. Viton, Perbunan usw.) versehen, die beim seitlichen Andrücken der Isolierhülse durch eine Andruckplatte verformt wird. Das Andrücken geschieht mit Hilfe einer Andrückschraube, die in die Führungshülse eingreift und die Andruckplatte verschiebt.The insulating sleeve, which is located between the guide sleeve and the heating conductor, is provided with a seal made of silicone or another heat-resistant material (e.g. Viton, Perbunan, etc.), which is deformed by a pressure plate when the insulating sleeve is pressed on from the side. The pressing is done with the help of a pressure screw, which engages in the guide sleeve and moves the pressure plate.
Der Heizleiter kann, sofern Temperaturen von über 200 ° C im Anschlußbereich an das Ofengefäß zu erwarten sind, mit einer Kühlmittelumlaufeinrichtung versehen werden, durch die ein gasförmiges oder flüssiges Kühlmittel geschickt wird.Provided that temperatures of over 200 ° C. are to be expected in the connection area to the furnace vessel, the heating conductor can be provided with a coolant circulation device through which a gaseous or liquid coolant is sent.
Gegen elektrische Überschläge an den Befestigungsstellen der Führungshülse mit dem Ofengefäß, die z.B. bei Ablagerung von elektrisch leitenden Stäuben entstehen, werden die Befestigungselemente durch Sicherungsmittel (aus Silikon oder dgl.) oder Beschichten mit derartigen Stoffen geschützt.Against electrical flashovers at the fastening points of the guide sleeve with the furnace vessel, e.g. If electrically conductive dusts are deposited, the fastening elements are protected by securing means (made of silicone or the like) or coated with such substances.
Die Erfindung wird nachstehend an Hand der schematischen Zeichnung, in der ein Ausführungsbeispiel dargestellt ist, näher erläutert.The invention is explained below with reference to the schematic drawing in which an embodiment is shown.
Es zeigen
- Fig. 1 einen Längsschnitt durch einen Heizleiter im Befestigungsbereich an der Wand eines Vakuumofens und
- Fig. 2 eine Schnittdarstellung einer Einzelheit gemäß Fig. 1 als Alternative.
- Fig. 1 shows a longitudinal section through a heat conductor in the mounting area on the wall of a vacuum oven and
- Fig. 2 is a sectional view of a detail of FIG. 1 as an alternative.
Aus Fig. 1 ist die erfindungsgemäße Anordnung eines Heizleiters (1) im Anschlußbereich der Ofenwand (2) eines ( nicht im einzelnen dargestellten ) Vakuumofens ersichtlich. Das Ofeninnere soll sich (gemäß Fig. 1) links von der Ofenwand (2) befinden. Auf die Darstellung des elektrischen Anschlusses des Heizleiters ( auf der rechten Hälfte von Fig. 1) ist verzichtet worden, weil der elektr. Anschluß nicht Gegenstand der Erfindung ist.1 shows the arrangement according to the invention of a heating conductor (1) in the connection area of the furnace wall (2) of a vacuum furnace (not shown in detail). The inside of the furnace should be (according to FIG. 1) to the left of the furnace wall (2). In the representation of the electrical connection of the heating conductor (on the right half of Fig. 1) has been omitted because of the electr. Connection is not the subject of the invention.
Der Heizleiter ist mit einer Isolierhülse (5) aus beispielsweise Hartglasgewebe (HGW) umgeben. In diese Isolierhülse ist eine Dichtung (9) eingesetzt, die z.B. aus Silikon hergestellt ist.The heating conductor is surrounded by an insulating sleeve (5) made of, for example, hard glass fabric (HGW). A seal (9) is inserted into this insulating sleeve, e.g. is made of silicone.
Im dem dargestellten Anschlußbereich ist der Heizleiter (1) mit einer Kühleinrichtung (11) versehen, durch die ein flüssiges oder gasförmiges Kühlmittel zu- und rückläuft.In the connection area shown, the heating conductor (1) is provided with a cooling device (11) through which a liquid or gaseous coolant flows in and out.
Der Heizleiter (1) mit der Isolierhülse (5) ist in einer Führungshülse (3) aus Edelstahl geführt. Die Führungshülse weist nach Fig. 1 ein Schraubgewinde (14) auf, mit welchem die Führungshülse in eine vorgesehene Öffnung der Ofengefäßwand (2) eingeschraubt wird.The heating conductor (1) with the insulating sleeve (5) is guided in a stainless steel guide sleeve (3). 1, the guide sleeve has a screw thread (14) with which the guide sleeve is screwed into an opening provided in the furnace vessel wall (2).
Zwischen Führungshülse (3) und Ofengefäßwand (2) wird eine Dichtung (4) aus z.B. Silikon angeordnet, die beim Einschrauben der Führungshülse (3) in die Ofengefäßwand (2) verformt wird und dadurch abdichtet.Between the guide sleeve (3) and the furnace wall (2), a seal (4) made of e.g. Silicone arranged, which is deformed when screwing the guide sleeve (3) into the furnace vessel wall (2) and thereby seals.
Anstelle der Schraubverbindung von Führungshülse (3) mit Ofengefäßwand (2) läßt sich eine lösbare Verbindung auch in der (nicht dargestellten) Weise erzielen, daß die Führungshülse mit einem Flansch versehen wird, der mittels Schrauben mit der Ofengefäßwand verbunden wird. Zwischen Führungshülsenflansch und Ofengefäßwand wird eine Silikondichtung angeordnet.Instead of the screw connection of the guide sleeve (3) with the furnace vessel wall (2), a detachable connection can also be achieved in the manner (not shown) that the guide sleeve is provided with a flange which is connected to the furnace vessel wall by means of screws. A silicone seal is placed between the guide sleeve flange and the furnace wall.
Die vollkommene Abdichtung zwischen der Isolierhülse (5) und dem Heizleiter (1) durch Verformung der Dichtung (9) wird in der Weise erreicht, daß durch Anziehen der Andruckschraube (7) und dadurch verursachtes Vorschieben der Andruckplatte (6) gegen eine Anlagefläche an der Isolierhülse (5) die Isolierhülse in Richtung Ofengefäßwand (2) bewegt wurde.The perfect seal between the insulating sleeve (5) and the heating conductor (1) by deforming the seal (9) is achieved in such a way that by tightening the pressure screw (7) and thereby pushing the pressure plate (6) against a contact surface on the insulating sleeve (5) the insulating sleeve has been moved in the direction of the furnace vessel wall (2).
Fig. 2 zeigt eine Alternative zu der Verschiebeeinrichtung für die Isolierhülse (5) nach Fig. 1. Hier ist die Führungshülse (3) mit einem Flansch versehen und das Verschieben der Isolierhülse (5) zur Verformung der Dichtung (9) geschieht beim Festziehen der Andruckplatte (6) gegen den Flansch.Fig. 2 shows an alternative to the displacement device for the insulating sleeve (5) according to Fig. 1. Here, the guide sleeve (3) is provided with a flange and the displacement of the insulating sleeve (5) to deform the seal (9) takes place when the Pressure plate (6) against the flange.
In Fig. 1 ist mit (8) eine Sicherungskappe aus Silikon für den Kopf der Andruckschraube (7) bezeichnet. Auf diese Weise ist ein Schutz gegen elektrische Überschlage gewährleistet. Bei Verwendung von Innensechskantschrauben wird mit Silikon abgespritzt.In Fig. 1, (8) denotes a silicone safety cap for the head of the pressure screw (7). In this way, protection against electrical arcing is guaranteed. When using hexagon socket screws, silicone is used for spraying.
Aus Fig. 2 ist der Schutz der Flanschverbindung gegen elektrische Überschläge durch Isolierhülsen (12) und Isolierscheiben (13) ersichtlich.From Fig. 2 the protection of the flange connection against electrical flashovers by insulating sleeves (12) and insulating washers (13) can be seen.
Claims (6)
dadurch gekennzeichnet,
daß der mit einer Isolierhülse (5) versehene Heizleiter (1) von einer Führungshülse (3) umgeben ist, mit der der Heizleiter (1) mit der Ofengefäßwand (2) lösbar verbunden ist und daß zwischen Isolierhülse (5) und Heizleiter (1) sowie zwischen Führungshülse (3) und Ofengefäßwand (2) Dichtungen (9, 4) angeordnet sind, wobei die Anpressung der Dichtung (9) zwischen Isolierhülse (5) und Heizleiter (1) durch Längsverschiebung der Isolierhülse (5) mit Hilfe einer Andruckschraube (7) über eine Andruckplatte (6) erfolgt und die Dichtung (4) zwischen Führungshülse (3) und Ofengefäßwand (2) während der Verbindung dieser beiden Teile (3, 2) angepreßt wird.1. Device for sealing and fastening heating conductors to electrically heated vacuum furnaces, in particular aluminum vacuum furnaces,
characterized,
that the heating conductor (1) provided with an insulating sleeve (5) is surrounded by a guide sleeve (3) with which the heating conductor (1) is detachably connected to the furnace vessel wall (2) and that between the insulating sleeve (5) and heating conductor (1) seals (9, 4) are arranged between the guide sleeve (3) and the furnace vessel wall (2), the pressure of the seal (9) between the insulating sleeve (5) and the heating conductor (1) by longitudinally displacing the insulating sleeve (5) with the aid of a pressure screw ( 7) via a pressure plate (6) and the seal (4) between the guide sleeve (3) and the furnace vessel wall (2) is pressed during the connection of these two parts (3, 2).
dadurch gekennzeichnet,
daß die Führungshülse (3) mit einer Luft- oder Flüssigkeitskühlung (10) versehen ist.2. Device for sealing and fastening heating conductors according to claim 1,
characterized,
that the guide sleeve (3) is provided with air or liquid cooling (10).
dadurch gekennzeichnet,
daß der Heizleiter (1) im Anschlußbereich an die Ofengefäßwand (2) mit einer Luft- oder Flüssigkeitskühlung (11) versehen ist.3. Device for sealing and fastening heating conductors according to claim 1,
characterized,
that the heating conductor (1) in the connection area to the furnace vessel wall (2) is provided with air or liquid cooling (11).
dadurch gekennzeichnet,
daß die Befestigung der Führungshülse (3) durch Einschrauben in eine Öffnung der Ofengefäßwand (2) erfolgt.4. Device for sealing and fastening heating conductors according to claim 1,
characterized,
that the guide sleeve (3) is fastened by screwing it into an opening in the furnace vessel wall (2).
dadurch gekennzeichnet,
daß die Befestigung der Führungshülse (3) an der Ofengefäßwand mittels einer Flanschverbindung erfolgt.5. Device for sealing and fastening heating conductors according to claim 1,
characterized,
that the guide sleeve (3) is attached to the furnace vessel wall by means of a flange connection.
dadurch gekennzeichnet,
daß die Befestigungen des Heizleiters und die Anpreßmittel für die Dichtungen durch Isolierungen (8, 12, 13) gegen elektrische Überschläge gesichert sind.6. Device for sealing and fastening heating conductors according to one or more of the preceding claims,
characterized,
that the fastenings of the heating conductor and the pressing means for the seals are secured by insulations (8, 12, 13) against electrical flashovers.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3916497A DE3916497A1 (en) | 1989-05-20 | 1989-05-20 | DEVICE FOR SEALING AND FASTENING HEATING LADDERS ON ELECTRICALLY HEATED VACUUM OVENS |
| DE3916497 | 1989-05-20 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0399306A2 true EP0399306A2 (en) | 1990-11-28 |
| EP0399306A3 EP0399306A3 (en) | 1991-01-23 |
| EP0399306B1 EP0399306B1 (en) | 1993-08-11 |
Family
ID=6381073
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP90108865A Revoked EP0399306B1 (en) | 1989-05-20 | 1990-05-11 | Tightening and fastening device of heating conductors on electrically heated vacuum furnaces |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0399306B1 (en) |
| DE (2) | DE3916497A1 (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE852628C (en) * | 1951-02-01 | 1952-10-16 | Voigt & Haeffner Ag | Tubular heater combined with a sealing body |
| US3117213A (en) * | 1960-05-25 | 1964-01-07 | Lumalampan Ab | Tubular electric furnace of the resistance type |
| US3967047A (en) * | 1975-08-19 | 1976-06-29 | Evans Products Company | Electrode cooling apparatus |
| US4093816A (en) * | 1977-02-11 | 1978-06-06 | Midland-Ross Corporation | Furnace heating apparatus |
| FR2449139A1 (en) * | 1979-02-16 | 1980-09-12 | Alusuisse | CURRENT SUPPLY DEVICE FOR ELECTRODE, PARTICULARLY MELTING FURNACES AND ELECTROLYSIS TANKS FOR THE PRODUCTION OF METALS |
| FR2540574A1 (en) * | 1983-02-04 | 1984-08-10 | Electricite De France | METHOD AND DEVICE FOR MOUNTING A SEALED SCREW CONNECTION ASSEMBLY, PARTICULARLY FOR CONNECTING A DIP ELEMENT TO A SPEAKER |
| EP0196221A2 (en) * | 1985-03-27 | 1986-10-01 | Schlumberger Industries Limited | Method of making ceramic composites |
| FR2622381A1 (en) * | 1987-10-21 | 1989-04-28 | Electricite De France | ELECTRIC HEATER |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2253981A (en) * | 1938-07-28 | 1941-08-26 | Manufactures Des Glaccs & Prod | Current supply device for resistors of electric furnaces |
| DE2020210A1 (en) * | 1970-04-25 | 1971-11-11 | Kocks Gmbh Friedrich | Graphite hairpin type furnace resistance heating element |
| SE407482B (en) * | 1977-01-21 | 1979-03-26 | Asea Ab | ELECTRICAL GENERATION |
| DE2950532C2 (en) * | 1979-12-15 | 1986-06-12 | Leybold-Heraeus GmbH, 5000 Köln | Electrically heated oven with flexible heating conductor |
| US4608698A (en) * | 1984-09-10 | 1986-08-26 | Abar Ipsen Industries | Electric heat treating furnace with quickly serviceable heating assembly components |
| FR2599130A1 (en) * | 1986-05-26 | 1987-11-27 | Mgr Sa Fours | Arch furnace made with ceramic fibres having thermally insulated traverse supports |
-
1989
- 1989-05-20 DE DE3916497A patent/DE3916497A1/en not_active Withdrawn
-
1990
- 1990-05-11 EP EP90108865A patent/EP0399306B1/en not_active Revoked
- 1990-05-11 DE DE9090108865T patent/DE59002264D1/en not_active Revoked
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE852628C (en) * | 1951-02-01 | 1952-10-16 | Voigt & Haeffner Ag | Tubular heater combined with a sealing body |
| US3117213A (en) * | 1960-05-25 | 1964-01-07 | Lumalampan Ab | Tubular electric furnace of the resistance type |
| US3967047A (en) * | 1975-08-19 | 1976-06-29 | Evans Products Company | Electrode cooling apparatus |
| US4093816A (en) * | 1977-02-11 | 1978-06-06 | Midland-Ross Corporation | Furnace heating apparatus |
| FR2449139A1 (en) * | 1979-02-16 | 1980-09-12 | Alusuisse | CURRENT SUPPLY DEVICE FOR ELECTRODE, PARTICULARLY MELTING FURNACES AND ELECTROLYSIS TANKS FOR THE PRODUCTION OF METALS |
| FR2540574A1 (en) * | 1983-02-04 | 1984-08-10 | Electricite De France | METHOD AND DEVICE FOR MOUNTING A SEALED SCREW CONNECTION ASSEMBLY, PARTICULARLY FOR CONNECTING A DIP ELEMENT TO A SPEAKER |
| EP0196221A2 (en) * | 1985-03-27 | 1986-10-01 | Schlumberger Industries Limited | Method of making ceramic composites |
| FR2622381A1 (en) * | 1987-10-21 | 1989-04-28 | Electricite De France | ELECTRIC HEATER |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3916497A1 (en) | 1990-11-22 |
| DE59002264D1 (en) | 1993-09-16 |
| EP0399306B1 (en) | 1993-08-11 |
| EP0399306A3 (en) | 1991-01-23 |
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