AT117471B - Device for the investigation of gases by means of electrically heated measuring wires using the change in thermal conductivity with the composition. - Google Patents

Device for the investigation of gases by means of electrically heated measuring wires using the change in thermal conductivity with the composition.

Info

Publication number
AT117471B
AT117471B AT117471DA AT117471B AT 117471 B AT117471 B AT 117471B AT 117471D A AT117471D A AT 117471DA AT 117471 B AT117471 B AT 117471B
Authority
AT
Austria
Prior art keywords
gases
measuring wires
composition
thermal conductivity
change
Prior art date
Application number
Other languages
German (de)
Original Assignee
Charles Engelhard Inc
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 Charles Engelhard Inc filed Critical Charles Engelhard Inc
Application granted granted Critical
Publication of AT117471B publication Critical patent/AT117471B/en

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote monitoring or remote control of equipment in a power distribution network
    • H02J13/13—Circuit arrangements for providing remote monitoring or remote control of equipment in a power distribution network characterised by the transmission of data to equipment in the power network
    • H02J13/1311—Circuit arrangements for providing remote monitoring or remote control of equipment in a power distribution network characterised by the transmission of data to equipment in the power network using the power network as support for the transmission

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Investigating Or Analyzing Materials Using Thermal Means (AREA)

Description

  

   <Desc/Clms Page number 1> 
 



  Vorrichtung zur Untersuchung von Gasen   mittels elektrisch geheizter Nessdrähte   unter Benützung der Änderung der Wärmeleitfähigkeit mit der   Zusammensetzung.   



   Bei den bekannten Vorrichtungen der den Gegenstand der Erfindung bildenden Art sind die in Kanälen eines MetalIblocks liegenden, von dem elektrischen Heizstrom durchflossenen Messdrähte oder Messdrahtschrauben entweder unmittelbar den jene Kanäle   durchströmenden   Gasen ausgesetzt oder sie sind gegen die Gase durch Rohre aus Metall oder Glimmer geschützt, welche sie in geringem Abstande umgeben. Demgegenüber sind gemäss der Erfindung die aus Platin bestehenden Messdrähte dicht an die Innenseite von an einem Ende geschlossenen Quarzrohren   schraubenförmig   gewickelt, deren offene Enden ebenso wie die Enden der Messdrähte in das Gehäuse der Messkammer eingekittet werden.

   Durch den Einbau solcher Messdrähte in die von dem   Prüf- und Vergleichsgas durchströmten   Kanäle des Metallblocks ist infolge der Quarzhülle eine gute   Wärmeübertragung   vom Messdraht nach dem Gaskanal gewährleistet, der Messdraht gegen chemische Wirkungen der Gase gesichert und für die   unveränderliche   Lage des Messdrahtes innerhalb des Gaskanals auch bei starken Erschütterungen des Prüfapparates gesorgt, was bei den bekannten Gasprüfern mit in   Metall- oder Glimmerrohren schwebend   befestigten   Messdrähten nicht   der Fall ist. Werden zwecks Reinigung der Gaskanäle die in ein Quarzrohr eingebetteten Messdrähte aus dem Gaskanal entfernt, so ist deren Einsetzung in die vorher von ihnen innegehabte Lage gewährleistet. 



   Eine Ausführungsform der Vorrichtung gemäss der Erfindung ist auf der Zeichnung dargestellt. 



   In dem Metallblock   8   sind nebeneinander zwei   Messkammern   12 vorgesehen, eine für das Prüfgas und eine für das Vergleichsgas. Auf der Zeichnung ist eine dieser   Messkammern   im Schnitt dargestellt. 
 EMI1.1 
 Vergleichsgaszelle liegen. 

**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.



   <Desc / Clms Page number 1>
 



  Device for the investigation of gases by means of electrically heated measuring wires using the change in thermal conductivity with the composition.



   In the known devices of the type forming the subject of the invention, the measuring wires or measuring wire screws through which the electrical heating current flows, lying in the channels of a metal block, are either directly exposed to the gases flowing through those channels or they are protected against the gases by tubes made of metal or mica, which surround them at a short distance. In contrast, according to the invention, the measuring wires made of platinum are helically wound tightly against the inside of quartz tubes closed at one end, the open ends of which, like the ends of the measuring wires, are cemented into the housing of the measuring chamber.

   By installing such measuring wires in the channels of the metal block through which the test and reference gas flows, good heat transfer from the measuring wire to the gas channel is guaranteed due to the quartz shell, the measuring wire is secured against chemical effects of the gases and also for the unchangeable position of the measuring wire within the gas channel taken care of in the event of strong vibrations of the test apparatus, which is not the case with the known gas detectors with measuring wires suspended in metal or mica tubes. If the measuring wires, which are embedded in a quartz tube, are removed from the gas duct for the purpose of cleaning the gas ducts, their insertion into the position they previously occupied is guaranteed.



   An embodiment of the device according to the invention is shown in the drawing.



   Two measuring chambers 12 are provided next to one another in the metal block 8, one for the test gas and one for the reference gas. One of these measuring chambers is shown in section on the drawing.
 EMI1.1
 Reference gas cell.

** WARNING ** End of DESC field may overlap beginning of CLMS **.

Claims (1)

PATENT-ANSPRUCH : Vorrichtung zur Untersuchung von Gasen mittels elektrisch geheizter Messdrähte unter Benützung der Änderung der Wärmeleitfähigkeit mit der Zusammensetzung, dadurch gekennzeichnet, dass die aus Platin bestehenden Messdrähte dicht an die Innenseite von an einem Ende geschlossenen Quarzrohren schraubenförmig gewickelt sind, deren offene Enden ebenso wie die Enden der Messdrähte in das Gehäuse der Messkammer eingekittet werden. EMI1.2 **WARNUNG** Ende CLMS Feld Kannt Anfang DESC uberlappen**. PATENT CLAIM: Device for examining gases by means of electrically heated measuring wires using the change in thermal conductivity with the composition, characterized in that the measuring wires made of platinum are helically wound close to the inside of quartz tubes closed at one end, their open ends as well how the ends of the measuring wires are cemented into the housing of the measuring chamber. EMI1.2 ** WARNING ** End of CLMS field may overlap beginning of DESC **.
AT117471D 1926-05-29 1926-12-20 Device for the investigation of gases by means of electrically heated measuring wires using the change in thermal conductivity with the composition. AT117471B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US117471XA 1926-05-29 1926-05-29

Publications (1)

Publication Number Publication Date
AT117471B true AT117471B (en) 1930-04-25

Family

ID=21751807

Family Applications (1)

Application Number Title Priority Date Filing Date
AT117471D AT117471B (en) 1926-05-29 1926-12-20 Device for the investigation of gases by means of electrically heated measuring wires using the change in thermal conductivity with the composition.

Country Status (1)

Country Link
AT (1) AT117471B (en)

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