AT126499B - Glazed wire resistor. - Google Patents
Glazed wire resistor.Info
- Publication number
- AT126499B AT126499B AT126499DA AT126499B AT 126499 B AT126499 B AT 126499B AT 126499D A AT126499D A AT 126499DA AT 126499 B AT126499 B AT 126499B
- Authority
- AT
- Austria
- Prior art keywords
- alkali
- glazed
- wire resistor
- glaze
- glazed wire
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C17/00—Apparatus or processes specially adapted for manufacturing resistors
- H01C17/02—Apparatus or processes specially adapted for manufacturing resistors adapted for manufacturing resistors with envelope or housing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J19/00—Details of vacuum tubes of the types covered by group H01J21/00
- H01J19/02—Electron-emitting electrodes; Cathodes
- H01J19/04—Thermionic cathodes
- H01J19/14—Cathodes heated indirectly by an electric current; Cathodes heated by electron or ion bombardment
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Surface Treatment Of Glass (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
- Details Of Resistors (AREA)
Description
<Desc/Clms Page number 1>
Einglasierter Drahtwiderstaiid.
Die Erfindung betrifft einen elektrischen Widerstand, der in eine Glasur eingebettet ist. deren Leitfähigkeit bei erhöhter Temperatur auf das Mindestmass beschränkt wird.
Es ist bekannt, auf einen keramischen Wicklungsträger drahtgewickelte Widerstände durch eine Glasur vor Oxydation zu schützen. Durch das Auftragen der Glasur wird die Belastbarkeit, der Widerstände erhöht, und die Drähte können bei hoheren Temperaturen nicht durcleinancler springen. Eine gewisse Grenze wird der Belastbarkeit dadurch gesetzt. dass jede Glasur bei höheren Temperaturen elektrisch leitend wird; je höher die Temperatur ist, desto merklicher wird der Einfluss dieses Nebenschlusses. Erfindungsgemäss werden für einglasierte Wider- stände solche Glasuren verwendet, die kleinste Leitfähigkeit bei höherer Temperatur besitzen.
Als solche haben sich Glasuren erwiesen, die keine Alkalimetalle enthalten. Die kleinsten Mengen von Alkalimetallen in der Glasur erhöhen die Leitfähigkeit dieser ausserordentlich. Es ist zwar bei der Verwendung technischer Reagenzien unmöglich, Alkali als Verunreinigung vollkommen auszuschliessen, doch zeigt der praktische Versuch, dass bei der Verwendung solcher Reagenzien, die auf Alkali aufgebaut sind, eine starke Verminderung der Isolationsgiite erzielt wird. während diejenigen Anteile an Alkali, welche sich in üblicher Grenze der chemischen Verunreinigung bewegen, nicht mehr von erheblicher Bedeutung sind.
Alkalifreie Glasuren geben wenig Glanz und keine besonders schönen Farben. Es ist daher vorteilhaft. diese alkalifreien Glasuren mit einer alkalihalngen Glasurschicht zu bedecken, die hohen Glanz und schöne Färbungen aufweist. Sie ist vom Draht vollkommen isoliert und dient lediglich als äusserer Mantel.
PATENT-ANSPRÜCHE :
1. Einglasierter, auf einen keramischen Wicklungsträger gewickelter elektrischer Drahtwiderstand. dadurch gekennzeichnet, dass der Draht in eine alkalifreie Glasur eingebettet ist.
EMI1.1
**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.
<Desc / Clms Page number 1>
Glazed wire resistor.
The invention relates to an electrical resistor which is embedded in a glaze. whose conductivity is limited to a minimum at elevated temperature.
It is known to protect wire-wound resistors on a ceramic winding carrier from oxidation by means of a glaze. Applying the glaze increases the resilience and resistance, and the wires cannot crack easily at high temperatures. This places a certain limit on the resilience. that every glaze becomes electrically conductive at higher temperatures; the higher the temperature, the more noticeable the influence of this shunt becomes. According to the invention, glazes are used for glazed resistors which have the lowest conductivity at a higher temperature.
Glazes that do not contain any alkali metals have proven to be such. The smallest amounts of alkali metals in the glaze increase the conductivity of this extremely. Although it is impossible when using technical reagents to completely exclude alkali as an impurity, practical tests show that when using such reagents which are based on alkali, a great reduction in the insulation power is achieved. while those proportions of alkali which are within the usual limit of chemical contamination are no longer of considerable importance.
Alkali-free glazes give little shine and not particularly beautiful colors. It is therefore beneficial. to cover these alkali-free glazes with an alkali-based glaze layer that has a high gloss and beautiful colors. It is completely isolated from the wire and only serves as an outer jacket.
PATENT CLAIMS:
1. Glazed electrical wire resistor wound on a ceramic winding carrier. characterized in that the wire is embedded in an alkali-free glaze.
EMI1.1
** WARNING ** End of DESC field may overlap beginning of CLMS **.
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE153014X | 1930-02-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AT126499B true AT126499B (en) | 1932-01-25 |
Family
ID=5675406
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AT126499D AT126499B (en) | 1930-02-13 | 1931-01-28 | Glazed wire resistor. |
Country Status (4)
| Country | Link |
|---|---|
| AT (1) | AT126499B (en) |
| CH (1) | CH153014A (en) |
| FR (1) | FR711283A (en) |
| GB (1) | GB370565A (en) |
-
1931
- 1931-01-28 AT AT126499D patent/AT126499B/en active
- 1931-02-12 GB GB4478/31A patent/GB370565A/en not_active Expired
- 1931-02-13 CH CH153014D patent/CH153014A/en unknown
- 1931-02-13 FR FR711283D patent/FR711283A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR711283A (en) | 1931-09-07 |
| GB370565A (en) | 1932-04-14 |
| CH153014A (en) | 1932-02-29 |
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