AT86972B - Negative carbon electrode for headlights. - Google Patents

Negative carbon electrode for headlights.

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Publication number
AT86972B
AT86972B AT86972DA AT86972B AT 86972 B AT86972 B AT 86972B AT 86972D A AT86972D A AT 86972DA AT 86972 B AT86972 B AT 86972B
Authority
AT
Austria
Prior art keywords
headlights
carbon electrode
negative carbon
negative
electrodes
Prior art date
Application number
Other languages
German (de)
Original Assignee
Siemens & Co Geb
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 Siemens & Co Geb filed Critical Siemens & Co Geb
Application granted granted Critical
Publication of AT86972B publication Critical patent/AT86972B/en

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Description

  

   <Desc/Clms Page number 1> 
 



  Negative Kohlenelektrode für Scheinwerfer. 



   Es ist vorgeschlagen worden, negative Elektroden für Scheinwerfer durch grössere oder geringere Graphitbeimengungen zur Kohlenmasse besser leitend zu machen. Solche Kohlenelektroden zeigen jedoch infolge der unvermeidlichen Unhomogenität der Masse vielerlei Nachteile. Gemäss vorliegender Erfindung bestehen die negativen Elektroden aus einer vollkommenen gleichmässigen Graphitmasse, wie sie nur erhalten werden kann, wenn die Elektroden nach der Formgebung in den elektrischen Ofen gebracht und darin in der an sich bekannten Weise graphitiert werden. 



   Gemäss vorliegender Erfindung werden Kohlenelektroden bis zu dem Grade und bei so hohen Temperaturen durchgraphitiert, dass ihr spezifischer Widerstand unter 10 Ohm liegt. Es hat sich gezeigt, dass hierdurch ungleichmässiger Abbrand, Unruhe des Lichtes, zu starke Erhitzung der Elektrode und alle sonstigen Nachteile der auf andere Art hergestellten, nur graphithaltigen Elektroden vollständig vermieden werden. 

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



   <Desc / Clms Page number 1>
 



  Negative carbon electrode for headlights.



   It has been proposed to make negative electrodes for headlights more conductive by adding larger or smaller amounts of graphite to the carbon mass. However, such carbon electrodes show many disadvantages due to the inevitable inhomogeneity of the mass. According to the present invention, the negative electrodes consist of a perfectly uniform graphite mass, which can only be obtained if the electrodes are brought into the electric furnace after shaping and graphitized therein in the manner known per se.



   According to the present invention, carbon electrodes are graphitized to the extent and at such high temperatures that their specific resistance is below 10 ohms. It has been shown that this completely avoids uneven burn-off, unsteadiness of the light, excessive heating of the electrode and all other disadvantages of electrodes made in a different way and only containing graphite.

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

Claims (1)

PATENT-ANSPRUCH : Negative Kohlenelektrode für Scheinwerfer, dadurch gekennzeichnet, dass sie beim Graphitieren im elektrischen Ofen so vollständig in Graphit übergeführt ist, dass ihr spezifischer Widerstand weniger als 10 beträgt. **WARNUNG** Ende CLMS Feld Kannt Anfang DESC uberlappen**. PATENT CLAIM: Negative carbon electrode for headlights, characterized in that when graphitizing in an electric furnace it is so completely converted into graphite that its specific resistance is less than 10. ** WARNING ** End of CLMS field may overlap beginning of DESC **.
AT86972D 1916-08-05 1917-07-04 Negative carbon electrode for headlights. AT86972B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE86972X 1916-08-05

Publications (1)

Publication Number Publication Date
AT86972B true AT86972B (en) 1922-01-10

Family

ID=5641522

Family Applications (1)

Application Number Title Priority Date Filing Date
AT86972D AT86972B (en) 1916-08-05 1917-07-04 Negative carbon electrode for headlights.

Country Status (1)

Country Link
AT (1) AT86972B (en)

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