AT40268B - Resistance coil made of spun wire. - Google Patents
Resistance coil made of spun wire.Info
- Publication number
- AT40268B AT40268B AT40268DA AT40268B AT 40268 B AT40268 B AT 40268B AT 40268D A AT40268D A AT 40268DA AT 40268 B AT40268 B AT 40268B
- Authority
- AT
- Austria
- Prior art keywords
- resistance coil
- coil made
- wire
- spun wire
- spun
- Prior art date
Links
- 238000004804 winding Methods 0.000 description 6
- 238000005452 bending Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
Landscapes
- Resistance Heating (AREA)
Description
<Desc/Clms Page number 1>
Widerstandsspule aus besponnenem Draht.
Die sehr dünnen Drähte von Spulen für Vorschaltwiderstände erwärmen sich beim Gebrauch bedeutend und dehnen sich infolgedessen sehr stark aus. Nun können-zwar die äusseren Wicklungen ihre Wärme an die Luft abgeben, sodass ihre Ausdehnung verhältnismässig gering bleibt, aber die im Innern liegenden Wicklungen sind gegen Abkühlung voll- ständig geschützt und suchen die, ihre Ausdehnung hindernden äusseren Wicklungen, zu sprengen.
Die Beanspruchungen der äusseren Wicklungen einer Spule infolge stärkerer Erwärmung und Ausdehnung der inneren worden aber deshalb besonders gross, weil dadurch die Zugund Biegungsspannungen noch vergrössert werden, die der Draht schon beim Aufspulen erhalten hat.
Deshallt werden gemäss vorliegender Erfindung Spulen für Vorschaltwiderstände dadurch gegen Zerstörung gesichert, dass sie aus Drähten hergestellt worden, mit in der Längsrichtung laufenden, eingesponnenen Fäden aus Isolationsmaterial, z. B. Zwirn oder Seide, dessen Dehnung kleiner und dessen Zerreiss-und Bruchfestigkeit grösser a ! s die des Drahtes ist.
Solche Spulen können starke Beanspruchungen im Betriebe aushalten, ohne dass die
Wicklungen zerreissen, da die Dehnungspannungen von den isolierenden Einlagen aufgenommen und vom Drahte ferngehalten werdfn ; sie bieten aber auch Vorteile bei der
**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.
<Desc / Clms Page number 1>
Resistance coil made of spun wire.
The very thin wires of coils for ballast resistors heat up significantly during use and consequently expand very much. Now the outer windings can release their heat into the air so that their expansion remains relatively small, but the inner windings are completely protected against cooling and try to burst the outer windings that prevent their expansion.
The stresses on the outer windings of a coil as a result of increased heating and expansion of the inner ones, however, have become particularly great because this increases the tensile and bending stresses that the wire has already received during winding.
Therefore, according to the present invention, coils for ballast resistors are secured against destruction in that they have been made from wires with spun-in threads of insulation material, e.g. B. thread or silk, the elongation of which is smaller and its tensile strength and breaking strength greater a! s is that of the wire.
Such coils can withstand heavy use without the
The windings tear because the tensile stresses are absorbed by the insulating inserts and kept away from the wire; but they also offer advantages in
** WARNING ** End of DESC field may overlap beginning of CLMS **.
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT40268T | 1908-12-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AT40268B true AT40268B (en) | 1909-12-27 |
Family
ID=3558655
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AT40268D AT40268B (en) | 1908-12-28 | 1908-12-28 | Resistance coil made of spun wire. |
Country Status (1)
| Country | Link |
|---|---|
| AT (1) | AT40268B (en) |
-
1908
- 1908-12-28 AT AT40268D patent/AT40268B/en active
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