DE246171C - - Google Patents
Info
- Publication number
- DE246171C DE246171C DENDAT246171D DE246171DA DE246171C DE 246171 C DE246171 C DE 246171C DE NDAT246171 D DENDAT246171 D DE NDAT246171D DE 246171D A DE246171D A DE 246171DA DE 246171 C DE246171 C DE 246171C
- Authority
- DE
- Germany
- Prior art keywords
- graphite
- resistance
- line
- bituminous
- layer
- 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.)
- Active
Links
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 10
- 239000010439 graphite Substances 0.000 claims description 10
- 229910002804 graphite Inorganic materials 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 241000182341 Cubitermes group Species 0.000 description 1
- 229920001875 Ebonite Polymers 0.000 description 1
- 241000779819 Syncarpia glomulifera Species 0.000 description 1
- 229940036248 Turpentine Drugs 0.000 description 1
- 230000001427 coherent Effects 0.000 description 1
- 239000003502 gasoline Substances 0.000 description 1
- 239000004579 marble Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000001739 pinus spp. Substances 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/20—Conductive material dispersed in non-conductive organic material
- H01B1/24—Conductive material dispersed in non-conductive organic material the conductive material comprising carbon-silicon compounds, carbon or silicon
Landscapes
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Adjustable Resistors (AREA)
- Apparatuses And Processes For Manufacturing Resistors (AREA)
Description
KAISERLICHESIMPERIAL
PATENTAMT.PATENT OFFICE.
PATENTSCHRIFTPATENT LETTERING
- M 246171 KLASSE 21 c. GRUPPE- M 246171 CLASS 21 c. GROUP
HENRI ABELIN in ST. PETERSBURG.HENRI ABELIN in ST. PETERSBURG.
Es ist bereits vorgeschlagen worden, einen elektrischen Widerstand durch Aufbrennen einer auf einem Isolierkörper aufgetragenen Graphitschicht herzustellen. Das vorgeschlagene Verfahren hat sich jedoch in der Praxis nicht bewährt, da es sich herausgestellt hat, daß die Moleküle der Graphitschicht auch nach einem etwaigen Einbrennen derselben niemals ein zusammenhängendes Ganzes und somitIt has already been proposed to create an electrical resistor by burning on a to produce graphite layer applied to an insulating body. The proposed procedure has not proven itself in practice, however, since it has been found that the molecules of the graphite layer also after a possible branding of the same never a coherent whole and thus
ίο auch nie einen zusammenhängenden Stromleitungsweg bilden können.ίο never a contiguous power line route can form.
Um einen Rheostaten aus Graphit für schwache Ströme mit konstantem Widerstand herzustellen, verfährt man nach der Erfindung wie folgt. Auf der etwas mattierten Oberfläche eines elektrisch nicht leitenden Körpers, wie z. B. Marmor, Porzellan, Ebonit o. dgl., wird eine dünne Schicht bituminösen Materials aufgebracht, welches in Terpentin, Benzin, Äther o. dgl. aufgelöst ist. Auf der so präparierten Oberfläche wird mit einem Graphitstab oder einem Bleistift ein Strich gezogen, welcher dann ganz oder teilweise in einen elektrischen Stromkreis von passender Spannung eingeschaltet wird.A graphite rheostat for weak currents with constant resistance produce, one proceeds according to the invention as follows. On the slightly matted surface an electrically non-conductive body, such as. B. marble, porcelain, ebonite or the like, a thin layer of bituminous material is applied, which is dissolved in turpentine, gasoline, Ether or the like is dissolved. A graphite rod is used on the surface prepared in this way or a pencil drawn a line, which then completely or partially in a electrical circuit is switched on by a suitable voltage.
Während der elektrische Strom den Graphitstrich durchzieht, steigt die Temperatur des letzteren, und die benachbarten Teilchen der bituminösen Schicht schmelzen und dringen zwischen die Graphitteilchen ein, was ein Wachsen des Widerstandes des Graphitstriches zur Folge hat. Infolge des Steigens des Widerstandes kann wiederum beim fortgesetzten Durchleiten des elektrischen Stromes die Temperatur nicht so hoch steigen, daß die bituminöse Schicht ganz schmilzt, so daß der so präparierte Graphitstrich mit der Zeit eine Widerstandshöhe erreicht, die dann unveränderlich bleibt.As the electric current runs through the graphite line, the temperature of the rises the latter, and the neighboring particles of the bituminous layer melt and penetrate between the graphite particles, which increases the resistance of the graphite coating has the consequence. As a result of the increase in resistance, it can turn again when continuing Passing the electric current the temperature does not rise so high that the bituminous Layer melts completely, so that the graphite line prepared in this way becomes one over time Resistance level is reached, which then remains unchangeable.
Der etwas matt gewordene bituminöse Strich kann nach dem Passieren des elektrischen Stromes leicht wieder aufpoliert werden.The bituminous coating, which has become somewhat dull, can after passing the electrical Stromes can easily be polished up again.
Claims (1)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE246171C true DE246171C (en) |
Family
ID=505074
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT246171D Active DE246171C (en) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE246171C (en) |
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0
- DE DENDAT246171D patent/DE246171C/de active Active
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