EP0014978A1 - Device for partially shielding from an open flame a container to be heated - Google Patents

Device for partially shielding from an open flame a container to be heated Download PDF

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Publication number
EP0014978A1
EP0014978A1 EP80100795A EP80100795A EP0014978A1 EP 0014978 A1 EP0014978 A1 EP 0014978A1 EP 80100795 A EP80100795 A EP 80100795A EP 80100795 A EP80100795 A EP 80100795A EP 0014978 A1 EP0014978 A1 EP 0014978A1
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EP
European Patent Office
Prior art keywords
glass ceramic
ceramic plate
passages
heated
container
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.)
Ceased
Application number
EP80100795A
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German (de)
French (fr)
Inventor
Helmut Antlinger
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.)
Schott AG
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Schott Glaswerke AG
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Publication date
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Publication of EP0014978A1 publication Critical patent/EP0014978A1/en
Ceased legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L99/00—Subject matter not provided for in other groups of this subclass
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L7/00—Heating or cooling apparatus; Heat insulating devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C3/00—Stoves or ranges for gaseous fuels
    • F24C3/08—Arrangement or mounting of burners
    • F24C3/085—Arrangement or mounting of burners on ranges

Definitions

  • the invention relates to a device for partially shielding a container to be heated, such as a glass bulb, from an open flame, e.g. a Bunsen burner, and to distribute the hot gas emitted by the flame.
  • a container to be heated such as a glass bulb
  • an open flame e.g. a Bunsen burner
  • asbestos wire networks have been used for such purposes, particularly in laboratories or the like, which consist of a relatively narrow-meshed wire mesh which is interspersed with an approximately circular layer of asbestos.
  • These asbestos wire nets are attached to a stand by means of a screw clamp or the like or placed on a tripod in such a way that they are in a horizontal position between the container to be heated, e.g. a glass bulb, and the flame e.g. a Bunsen burner.
  • the invention is therefore based on the object to provide a remedy here, namely by a device which is durable and absolutely reliable and any G e-propelled a health damage to the working staff excludes.
  • this object is achieved by a glass ceramic plate of relatively small thickness, e.g. solved in the range of about 2 to 7 mm.
  • Glass ceramic plates are highly thermally stable and have a coefficient of thermal expansion that is extremely small or zero. Due to the extremely high thermal resistance and fire resistance of the glass ceramic plates, correspondingly long service lives are achieved. Furthermore, the composition of a glass ceramic plate ensures that this does not represent a source of danger to the health of the workforce.
  • a ring of passages for the hot gas can be arranged around the central region of the glass ceramic plate with a full cross section to be arranged above the flame tip.
  • the central area with the full cross-section of the glass ceramic plate provides a certain shielding of the bulb to be heated or the like from the open flame, while the hot gases emanating therefrom pass through the ring of passages to the bulb to be heated or the like can.
  • the passages can be formed, for example, by circular bores and / or arcuate slots.
  • the passages in the form of bores or arcuate Slits can also be provided along several concentrically arranged circles.
  • the passages can also consist of slots arranged in the form of a beam or of groups of slots of the same and / or different lengths arranged parallel to the outer edges of the glass ceramic plate.
  • the edge of the glass ceramic plate is expediently held by a holder, e.g. supported from an angle profile frame, which in turn can have a mounting handle for the usual fixation on a stand.
  • angle profile frame can be open or U-shaped on one side and can be provided with clamping springs for fixing the glass ceramic plate.
  • the glass ceramic plate or its holder from the angle profile frame can also be loosely attached to e.g. put a tripod on or screw it on.
  • the glass ceramic plate can be mounted on the support ring of a tripod and in this position by several, e.g. four projections on the support ring must be secured laterally, each offset by an angle of 90 °.
  • FIGS. 1-6 serve the purpose of partially shielding a container to be heated from an open flame, for example that of a Bunsen burner , or of distributing the hot gases emanating from the flame in such a way that the bottom of the glass bulb heats as evenly as possible without coming into direct contact with the open flame.
  • the device of FIGS. 1 and 2 or 3 and 4 is arranged in a horizontal position between the Bunsen burner and the container.
  • the device according to FIGS. 1 and 2 has a glass ceramic plate 10 with a thickness of approximately 2-7 mm, preferably approximately 4 mm, which contains an area 11 with a full cross section in the right half of the illustration, while in FIG an area with passages 12 is shown on the left half, in the form of bores along two concentrically arranged circles.
  • the glass ceramic plate 10 is arranged so that it can be pulled out easily in a holder 12, which here consists of an angular profile frame that is open on one side.
  • a fastening means 15 is attached to this angular profile frame, with the aid of which the holder 13 with the inserted glass ceramic plate 10 can be clamped on a stand (not shown) at the desired height in the usual manner.
  • two clamping springs 16 are fastened to the angle profile frame in the positions shown in FIG. 1, which press the glass ceramic plate 10 against the legs of the angle profile frame lying in one plane.
  • F ig. 3 each shows a half 10a or 10b of two further embodiments of the glass ceramic plate.
  • the passages 12a for the hot gas consist of slots arranged radially around the circular central region 11.
  • the slots running on the intersecting axes of symmetry of the glass ceramic plate 10a are mutually the same length, but shorter than the remaining slots, which in turn can have the same length.
  • the passages for the hot gas are formed by pairs of slots 12b arranged around the central region 11, which in the arrangement shown in FIG. 3 run parallel to the outer edges of the glass ceramic plate 10b, in this way that a substantially circular central region 11 with a full cross section is obtained in this case too.
  • the glass ceramic plate 10a or 10b is arranged in a holder 130 which consists of a closed angle profile frame 140, on the legs of which the glass ceramic plate 10a or 10b is mounted in one plane.
  • a fastening means 15 is attached to the angle profile frame 140.
  • the tripod 18 shown in Figs. 5 and 6 is designed so that e.g. a Bunsen burner (not shown) can be set up.
  • the tripod 18 is provided with a support ring 17 on which, in the present embodiment, a full glass ceramic plate 10c with a thickness of e.g. 4 mm is placed loosely.
  • a support ring 17 on which, in the present embodiment, a full glass ceramic plate 10c with a thickness of e.g. 4 mm is placed loosely.
  • four projections 19 are arranged on the top of the support ring 17, each offset by an angle of 90 °.
  • These projections 19 can consist of the heads of screws or rivets, but they can also be welded or riveted or screwed-in bolts or the like.
  • the height of these projections 19 is in any case dimensioned such that the desired positional securing of the glass ceramic plate 10c on the support ring 17 is achieved.

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Clinical Laboratory Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
  • Baking, Grill, Roasting (AREA)

Abstract

In this device, a glass ceramic plate (10) is disposed horizontally between the flame and the container to be heated, and has openings (12) through which the hot gases emanating from the flame are distributed before they arrive at the container to be heated. The glass ceramic plate (10) can be held round the edge by a holder (13), it can be clamped to a tripod by means of a fastening rod (15), or it can be mounted on the support ring (17) of a trivet (18). <IMAGE>

Description

Die Erfindung bezieht sich auf eine Vorrichtung zur teilweisen Abschirmung eines zu erwärmenden Behältnisses, etwa eines Glaskolbens, gegenüber einer offenen Flamme, z.B. eines Bunsenbrenners, und zur Verteilung des von der Flamme ausgehenden heißen Gases.The invention relates to a device for partially shielding a container to be heated, such as a glass bulb, from an open flame, e.g. a Bunsen burner, and to distribute the hot gas emitted by the flame.

Bisher hat man für solche Zwecke, insbesondere in Laboratorien oder dergl. sog. Asbestdrahtnetze verwendet, die aus einem relativ engmaschigen Drahtgitter bestehen, welches mit einer etwa kreisförmigen Asbestschicht durchsetzt ist. Diese Asbestdrahtnetze werden mittels Schraubzwinge oder dergl. an einem Ständer so befestigt bzw. auf einen Dreifuß so aufgelegt, daß sie sich in horizontaler Lage zwischen dem zu erwärmenden Behältnis, z.B. einem Glaskolben, und der Flamme z.B. eines Bunsenbrenners befinden.So far, so-called asbestos wire networks have been used for such purposes, particularly in laboratories or the like, which consist of a relatively narrow-meshed wire mesh which is interspersed with an approximately circular layer of asbestos. These asbestos wire nets are attached to a stand by means of a screw clamp or the like or placed on a tripod in such a way that they are in a horizontal position between the container to be heated, e.g. a glass bulb, and the flame e.g. a Bunsen burner.

Der Nachteil dieser Asbestdrahtnetze besteht darin,.daß die bei jedem Arbeitsvorgang zum Glühen gebrachte Asbestschicht im Laufe der Zeit zerfällt und für das Arbeitspersonal gesundheitsschädlicher Asbeststaub entsteht, der durch die Thermik aufgewirbelt wird.The disadvantage of these asbestos wire nets is that the asbestos layer that glows with each work process disintegrates over time and creates harmful asbestos dust for the working personnel, which is whirled up by the thermals.

Der Erfindung liegt daher die Aufgabe zugrunde, hier eine - Abhilfe zu schaffen, und zwar durch eine Vorrichtung, die langlebig und absolut betriebssicher ist und jegliche Ge-fahr einer gesundheitlichen Schädigung des Arbeitspersonals ausschließt.The invention is therefore based on the object to provide a remedy here, namely by a device which is durable and absolutely reliable and any G e-propelled a health damage to the working staff excludes.

i Gemäß der Erfindung wird diese Aufgabe durch eine Glaskeramik-Platte von relativ geringer Dicke, z.B. im Bereich von etwa 2 bis 7 mm gelöst. Glaskeramik-Platten sind thermisch hochfest und haben einen Wärmeausdehnungskoeffizienten, der außerordentlich klein oder gleich Null ist. Aufgrund der extrem hohen thermischen Belastbarkeit und Feuerfestigkeit der Glaskeramik-Platten werden entsprechend lange Standzeiten erreicht. Ferner ist durch die Zusammensetzung einer Glaskeramik-Platte gewährleistet, daß diese keine Gefahrenquelle für die Gesundheit des Arbeitspersonals darstellt.According to the invention, this object is achieved by a glass ceramic plate of relatively small thickness, e.g. solved in the range of about 2 to 7 mm. Glass ceramic plates are highly thermally stable and have a coefficient of thermal expansion that is extremely small or zero. Due to the extremely high thermal resistance and fire resistance of the glass ceramic plates, correspondingly long service lives are achieved. Furthermore, the composition of a glass ceramic plate ensures that this does not represent a source of danger to the health of the workforce.

Es ist zwar bekannt, derartige Glaskeramik-Platten als Herdplatten mit rückseitig angeordneten elektrischen Heizelementen zu verwenden, ihre Anwendung als Abschirmung gegenüber z.B. einer Bunsenbrennerflamme liegt jedoch keinesfalls nahe.It is known to use such glass ceramic plates as stove tops with electrical heating elements arranged on the rear, their use as a shield against e.g. however, a Bunsen burner flame is by no means obvious.

Gemäß einer besonderen Ausführungsform kann um den zentralen, über der Flammenspitze anzuordnenden Bereich der Glaskeramik-Platte mit vollem Querschnitt ein Kranz von Durchlässen für das heiße Gas angeordnet sein. Durch den zentralen Bereich mit vollem Querschnitt der Glaskeramik-Platte erfolgt eine gewisse Abschirmung des zu erwärmenden Kolbens oder dgl. gegenüber der offenen Flamme, während die von dieser ausgehenden heißen Gase durch den Kranz von Durchlässen zu dem zu erwärmenden Kolben oder dgl. ge- langen können.According to a special embodiment, a ring of passages for the hot gas can be arranged around the central region of the glass ceramic plate with a full cross section to be arranged above the flame tip. The central area with the full cross-section of the glass ceramic plate provides a certain shielding of the bulb to be heated or the like from the open flame, while the hot gases emanating therefrom pass through the ring of passages to the bulb to be heated or the like can.

Die Durchlässe können z.B. durch kreisförmig angeordnete Bohrungen und/oder bogenförmige Schlitze gebildet sein. Die Durchlässe in Form von Bohrungen oder bogenförmigen Schlitzen können ferner entlang mehrerer, konzentrisch angeordneter Kreise vorgesehen sein.The passages can be formed, for example, by circular bores and / or arcuate slots. The passages in the form of bores or arcuate Slits can also be provided along several concentrically arranged circles.

Schließlich können die Durchlässe auch aus strahlenförmig angeordneten Schlitzen oder aus Gruppen von parallel zu den Außenrändern der Glaskeramik-Platte angeordneten Schlitzen gleicher und/oder unterschiedlicher Länge bestehen.Finally, the passages can also consist of slots arranged in the form of a beam or of groups of slots of the same and / or different lengths arranged parallel to the outer edges of the glass ceramic plate.

Zweckmäßig wird die Glaskeramik-Platte randseitig von einem Halter, z.B. aus einem Winkelprofilrahmen unterstützt, der wiederum einen Befestigungsstiel zur üblichen Fixierung an einem Ständer aufweisen kann.The edge of the glass ceramic plate is expediently held by a holder, e.g. supported from an angle profile frame, which in turn can have a mounting handle for the usual fixation on a stand.

Ferner kann der Winkelprofilrahmen an einer Seite offen bzw. U-förmig ausgebildet und mit Klemmfedern zur Fixierung der Glaskeramik-Platte versehen sein.Furthermore, the angle profile frame can be open or U-shaped on one side and can be provided with clamping springs for fixing the glass ceramic plate.

Die Glaskeramik-Platte oder ihr Halter aus dem Winkelprofilrahmen können aber auch lose auf z.B. einen Dreifuß aufgelegt oder an diesem angeschraubt werden.The glass ceramic plate or its holder from the angle profile frame can also be loosely attached to e.g. put a tripod on or screw it on.

Insbesondere kann die Glaskeramik-Platte auf dem Tragring eines Dreifußes gelagert und in dieser Position durch mehrere, z.B. vier Vorsprünge am Tragring seitlich gesichert sein, die jeweils um einen Winkel von 90° versetzt angeordnet sind.In particular, the glass ceramic plate can be mounted on the support ring of a tripod and in this position by several, e.g. four projections on the support ring must be secured laterally, each offset by an angle of 90 °.

Die Erfindung wird anschließend anhand der Zeichnungen mehrerer Ausführungsbeispiele erläutert.The invention is subsequently explained on the basis of the drawings of several exemplary embodiments.

Es zeigen;

  • Fig. 1 eine Draufsicht je zur Hälfte auf eine erste und eine zweite Ausführungsform einer Glaskeramik-Platte, eingesetzt in einen an einer Seite offenen Winkelprofilrahmen;
  • Fig. 2 eine Schnittansicht entlang der Linie II-II der Fig. 1;
  • Fig. 3 eine Draufsicht je zur Hälfte auf eine dritte und eine vierte Ausführungsform der Glaskeramik-Platte, eingesetzt in einen geschlossenen Winkelprofilrahmen als Halter;
  • Fig. 4 eine Schnittansicht entlang der Linie IV-IV der Fig. 3;
  • Fig. 5 eine Seitenansicht eines Dreifußes mit aufgelegter Glaskeramik-Platte und
  • Fig. 6 eine Draufsicht der Anordnung der Fig. 5.
Show it;
  • Figure 1 is a plan view half of a first and a second embodiment of a glass ceramic plate, inserted into an angle profile frame open on one side.
  • Fig. 2 is a sectional view taken along the line II-II of Fig. 1;
  • Figure 3 is a plan view half of a third and a fourth embodiment of the glass ceramic plate, used in a closed angle profile frame as a holder.
  • Fig. 4 is a sectional view taken along the line IV-IV of Fig. 3;
  • Fig. 5 is a side view of a tripod with a glass ceramic plate and
  • 6 is a top view of the arrangement of FIG. 5.

Die in den Figuren 1-6 abgebildeten Vorrichtungen dienen dem Zweck, einen zu erwärmenden Behälter gegenüber einer offenen Flamme, z.B. der eines Bunsenbrenners teilweise abzuschirmen-bzw. die von der Flamme ausgehenden heißen Gase so zu verteilen, daß der Boden des Glaskolbens möglichst gleichmäßig erwärmt wird, ohne in direkte Berührung mit der offenen Flamme zu kommen. Um dies zu erreichen, wird die Vorrichtung der Figuren 1 und 2, bzw. 3 und 4 in horizontaler Lage zwischen dem Bunsenbrenner und dem Behälter angeordnet.The devices shown in FIGS. 1-6 serve the purpose of partially shielding a container to be heated from an open flame, for example that of a Bunsen burner , or of distributing the hot gases emanating from the flame in such a way that the bottom of the glass bulb heats as evenly as possible without coming into direct contact with the open flame. In order to achieve this, the device of FIGS. 1 and 2 or 3 and 4 is arranged in a horizontal position between the Bunsen burner and the container.

Die Vorrichtung nach den Figuren 1 und 2 weist zu diesem Zweck eine Glaskeramik-Platte 10 mit einer Dicke von etwa 2 - 7 mm, vorzugsweise etwa 4 mm, auf, die in der rechten Darstellungshälfte einen Bereich 11 mit vollem Querschnitt enthält, während in der linken Hälfte ein Bereich mit Durchlässen 12 dargestellt ist, und zwar in Form von Bohrungen entlang zweier konzentrisch angeordneter Kreise.For this purpose, the device according to FIGS. 1 and 2 has a glass ceramic plate 10 with a thickness of approximately 2-7 mm, preferably approximately 4 mm, which contains an area 11 with a full cross section in the right half of the illustration, while in FIG an area with passages 12 is shown on the left half, in the form of bores along two concentrically arranged circles.

Die Glaskeramik-Platte 10 ist leicht herausziehbar in einem Halter 12 angeordnet, der hier aus einem an einer Seite offenen Winkelprofilrahmen besteht. An diesem Winkelprofilrahmen ist ein Befestigungsmittel 15 angebracht, mit dessen Hilfe der Halter 13 mit eingesetzter Glaskeramik-Platte 10 an einem (nicht gezeigten) Ständer in der jeweils gewünschten Höhe in üblicher Weise festgeklemmt werden kann.The glass ceramic plate 10 is arranged so that it can be pulled out easily in a holder 12, which here consists of an angular profile frame that is open on one side. A fastening means 15 is attached to this angular profile frame, with the aid of which the holder 13 with the inserted glass ceramic plate 10 can be clamped on a stand (not shown) at the desired height in the usual manner.

Um die Glaskeramik-Platte 10 in dem Halter 13 zu fixieren, sind zwei Klemmfedern 16 am Winkelprofilrahmen in den in Fig. 1 gezeigten Positionen befestigt, die die Glaskeramik-Platte 10 gegen die in einer Ebene liegenden Schenkel des Winkelprofilrahmens drücken.In order to fix the glass ceramic plate 10 in the holder 13, two clamping springs 16 are fastened to the angle profile frame in the positions shown in FIG. 1, which press the glass ceramic plate 10 against the legs of the angle profile frame lying in one plane.

Fig. 3 zeigt jeweils eine Hälfte 10a bzw. 10b von zwei weiteren Ausführungsformen der Glaskeramik-Platte. Die Durchlässe 12a für das heiße Gas bestehen bei der Glaskeramik-Platte 10a aus strahlenförmig um-den kreisförmigen zentralen Bereich 11 herum angeordneten Schlitzen. Die auf den sich kreuzenden Symmetrieachsen der Glaskeramik-Platte 10a verlaufenden Schlitze sind untereinander gleich lang, jedoch kürzer als die restlichen Schlitze, die ihrerseits gleiche Länge aufweisen können. F ig. 3 each shows a half 10a or 10b of two further embodiments of the glass ceramic plate. In the case of the glass ceramic plate 10a, the passages 12a for the hot gas consist of slots arranged radially around the circular central region 11. The slots running on the intersecting axes of symmetry of the glass ceramic plate 10a are mutually the same length, but shorter than the remaining slots, which in turn can have the same length.

Bei der Glaskeramik-Platte 10b sind die Durchlässe für das heiße Gas durch um den zentralen Bereich 11 herum angeordnete Paare von Schlitzen 12b gebildet, die in der in Fig. 3 gezeigten Anordnung parallel zu den Außenrändern der Glaskeramik-Platte 10b verlaufen, und zwar derart, daß auch in diesem Falle ein im wesentlich kreisförmiger zentraler Bereich 11 mit vollem Querschnitt erhalten wird.In the case of the glass ceramic plate 10b, the passages for the hot gas are formed by pairs of slots 12b arranged around the central region 11, which in the arrangement shown in FIG. 3 run parallel to the outer edges of the glass ceramic plate 10b, in this way that a substantially circular central region 11 with a full cross section is obtained in this case too.

Die Glaskeramik-Platte 10a oder 10b ist bei diesem Ausführungsbeispiel in einem Halter 130 angeordnet, der aus einem geschlossenen Winkelprofilrahmen 140 besteht, auf dessen in einer Ebene liegenden Schenkeln die Glaskeramik-Platte 10a oder 10b gelagert ist. Zur Fixierung des Halters 130 in der jeweils erwünschten horizontalen Lage an einem Ständer oder dgl. ist auch in diesem Falle ein Befestigungsmittel 15 an dem Winkelprofilrahmen 140 angebracht.In this exemplary embodiment, the glass ceramic plate 10a or 10b is arranged in a holder 130 which consists of a closed angle profile frame 140, on the legs of which the glass ceramic plate 10a or 10b is mounted in one plane. To fix the holder 130 in the desired horizontal position on a stand or the like. In this case too, a fastening means 15 is attached to the angle profile frame 140.

Der in den Fig. 5 und 6 gezeigte Dreifuß 18 ist so gestaltet, daß zwischen seinen Füßen z.B. ein (nicht gezeigter) Bunsenbrenner aufgestellt werden kann. Der Dreifuß 18 ist mit einem Tragring 17 versehen, auf dem im vorliegenden Ausführungsbeipsiel eine volle Glaskeramik-Platte 10c mit einer Dicke von z.B. 4 mm lose aufgelegt ist. Um die Positionierung der Glaskeramik-Platte 10c auf dem Tragring 17 zu erleichtern sowie ein seitliches Verrutschen der Platte 10c zu verhindern, sind auf der Oberseite des Tragringes 17 vier Vorsprünge 19, jeweils um einen Winkel von 90° versetzt, angeordnet. Diese Vorsprünge 19 können aus den Köpfen von Schrauben oder Nieten bestehen, es kann sich aber auch um angeschweißte oder eingenietete oder eingeschraubte Bolzen oder dgl. handeln. Die Höhe dieser Vorsprünge 19 ist in jedem Fall so bemessen, daß die erwünschte Lagesicherung der Glaskeramik-Platte 10c auf dem Tragring 17 erreicht wird.The tripod 18 shown in Figs. 5 and 6 is designed so that e.g. a Bunsen burner (not shown) can be set up. The tripod 18 is provided with a support ring 17 on which, in the present embodiment, a full glass ceramic plate 10c with a thickness of e.g. 4 mm is placed loosely. In order to facilitate the positioning of the glass ceramic plate 10c on the support ring 17 and to prevent the plate 10c from slipping sideways, four projections 19 are arranged on the top of the support ring 17, each offset by an angle of 90 °. These projections 19 can consist of the heads of screws or rivets, but they can also be welded or riveted or screwed-in bolts or the like. The height of these projections 19 is in any case dimensioned such that the desired positional securing of the glass ceramic plate 10c on the support ring 17 is achieved.

Claims (8)

1. Vorrichtung zur teilweisen Abschirmung eines zu erwärmenden Behältnisses, etwa eines Glaskolbens, gegenüber einer offenen Flamme, z.B. der eines Bunsenbrenners, gekennzeichnet durch eine Glaskeramik-Platte (10) von relativ geringer Dicke.1. Device for partially shielding a container to be heated, such as a glass bulb, from an open flame, e.g. that of a Bunsen burner, characterized by a glass ceramic plate (10) of relatively small thickness. 2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß um einen zentralenrüber der Flammenspitze anzuordnenden Bereich der Glaskeramik-Platte (10) mit vollem Querschnitt ein Kranz von Durchlässen (12) für das heiße Gas angeordnet ist.2. Device according to claim 1, characterized in that a ring of passages (12) for the hot gas is arranged around a central region of the glass ceramic plate (10) to be arranged above the flame tip. 3. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß die Durchlässe (12) durch kreisförmig angeordnete Bohrungen gebildet sind.3. Apparatus according to claim 2, characterized in that the passages (12) are formed by holes arranged in a circle. 4. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß die Durchlässe durch kreisförmig angeordnete Schlitze (12a) gebildet sind.4. The device according to claim 2, characterized in that the passages are formed by circularly arranged slots (12a). 5. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß die Durchlässe (12a, 12b) aus Gruppen von parallel zu den Außenrändern der Glaskeramik-Platte (10b) angeordneten Schlitzen gleicher und/oder unterschiedlicher Länge bestehen.5. The device according to claim 2, characterized in that the passages (12a, 12b) consist of groups of slots of the same and / or different length arranged parallel to the outer edges of the glass ceramic plate (10b). 6. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Glaskeramik-Platte (10, 10a, 10b) randseitig von einem Halter (13, 130) aus z.B. einem Winkelprofilrahmen (14, 140) unterstützt ist.6. The device according to claim 1, characterized in that the glass ceramic plate (10, 10a, 10b) on the edge of a holder (13, 130) from e.g. an angle profile frame (14, 140) is supported. 7. Vorrichtung nach Anspruch 7, dadurch gekennzeichnet, daß zur Fixierung der Glaskeramik-Platte (10) der Winkelprofilrahmen (14) an einer Seite offen und mit Klemmfedern (16) versehen ist.7. The device according to claim 7, characterized in that for fixing the glass ceramic plate (10) of the angle profile frame (14) is open on one side and provided with clamping springs (16). 8. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Glaskeramik-Platte (10c) auf dem Tragring (17) eines Dreifußes. (18) gelagert und in dieser Position durch mehrere Vorsprünge (19) am Tragring (17) seitlich gesichert ist.8. The device according to claim 1, characterized in that the glass ceramic plate (10c) on the support ring (17) of a D tripod. (18) mounted and laterally secured in this position by a plurality of projections (19) on the support ring (17).
EP80100795A 1979-02-21 1980-02-16 Device for partially shielding from an open flame a container to be heated Ceased EP0014978A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE7904805U 1979-02-21
DE19797904805U DE7904805U1 (en) 1979-02-21 1979-02-21 DEVICE FOR PARTIAL SHIELDING OF A CONTAINER TO BE WARMED, SUCH AS A GLASS BOTTLE, FROM AN OPEN FLAME

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EP0014978A1 true EP0014978A1 (en) 1980-09-03

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EP80100795A Ceased EP0014978A1 (en) 1979-02-21 1980-02-16 Device for partially shielding from an open flame a container to be heated

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR419282A (en) * 1910-08-04 1910-12-30 Henri Monserviez Alcohol table stove
US1495991A (en) * 1922-12-26 1924-06-03 Thomas H Drynan Boiler stand
FR1136330A (en) * 1954-08-24 1957-05-13 Selas Corp Of America Improvements in processes for cooking food and in gas radiation burners suitable for carrying out these processes
GB1038844A (en) * 1964-07-24 1966-08-10 Helix Universal Company Ltd Improvements in laboratory stands
US3488137A (en) * 1968-10-17 1970-01-06 Hikaru Naganuma Infrared gas burner with flashback prevention arrangement
US3830216A (en) * 1971-03-15 1974-08-20 Owens Illinois Inc Countertop heating apparatus
FR2248808A1 (en) * 1973-10-25 1975-05-23 Masson Sarl Le Heat diffuser for heating containers on cookers - edge of metal plate is rolled over lower asbestos plate
US3941117A (en) * 1974-10-21 1976-03-02 Owens-Illinois, Inc. Cooktop for a gas-fired range
DE2440701A1 (en) * 1974-08-24 1976-03-11 Schwank Gmbh GAS STOVE WITH ONE OR MORE COOKING BURNERS

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR419282A (en) * 1910-08-04 1910-12-30 Henri Monserviez Alcohol table stove
US1495991A (en) * 1922-12-26 1924-06-03 Thomas H Drynan Boiler stand
FR1136330A (en) * 1954-08-24 1957-05-13 Selas Corp Of America Improvements in processes for cooking food and in gas radiation burners suitable for carrying out these processes
GB1038844A (en) * 1964-07-24 1966-08-10 Helix Universal Company Ltd Improvements in laboratory stands
US3488137A (en) * 1968-10-17 1970-01-06 Hikaru Naganuma Infrared gas burner with flashback prevention arrangement
US3830216A (en) * 1971-03-15 1974-08-20 Owens Illinois Inc Countertop heating apparatus
FR2248808A1 (en) * 1973-10-25 1975-05-23 Masson Sarl Le Heat diffuser for heating containers on cookers - edge of metal plate is rolled over lower asbestos plate
DE2440701A1 (en) * 1974-08-24 1976-03-11 Schwank Gmbh GAS STOVE WITH ONE OR MORE COOKING BURNERS
US3941117A (en) * 1974-10-21 1976-03-02 Owens-Illinois, Inc. Cooktop for a gas-fired range

Also Published As

Publication number Publication date
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