AT150465B - Mica capacitor. - Google Patents
Mica capacitor.Info
- Publication number
- AT150465B AT150465B AT150465DA AT150465B AT 150465 B AT150465 B AT 150465B AT 150465D A AT150465D A AT 150465DA AT 150465 B AT150465 B AT 150465B
- Authority
- AT
- Austria
- Prior art keywords
- mica
- capacitor
- capacitance
- capacitors
- mica capacitor
- Prior art date
Links
Description
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Glimmerkondensator.
In der modernen Radiotechnik werden Kondensatoren sehr kleiner Kapazität, 15 cm und darunter, benötigt. Dabei werden an derartige Kondensatoren besonders hohe Anforderungen hinsichtlich Konstanz der Kapazität, engster Toleranzen der Kapazitätswerte (bis + 1%) und geringster Verlustwerte gestellt.
Für Kapazitäten, die nicht niedriger sind als zirka 15 cm haben sieh jene Glimmerkondensatoren gut bewährt, bei welchen auf jeder Seite des Glimmerplättchens ein Metallbelag angebracht ist, wobei diese Metallbeläge so angeordnet sind, dass sie einander nur mit einem Teil ihrer Fläche direkt gegen- überliegen. Durch Vergrösserung oder Verkleinerung der einander gegenüberliegenden Teile der Beläge können verschieden grosse Kapazitätswerte erreicht werden. Unter eine gewisse Grenze kann man jedoch dabei nicht heruntergehen, da dann, wenn die einander gegenüberliegenden Teile der Beläge sehr klein gewählt werden, grosse Streuungen in der Erzeugung unvermeidlich sind, was der Forderung nach einer möglichst niedrigen Toleranz widerspricht.
Die Kapazität derartiger Kondensatoren dadurch herabzusetzen, dass ein dickeres Glimmerplättchen benutzt wird, ist nicht angängig, weil dickere Glimmer- plättchen Schichtungen und Blasen (Lufteinschlüsse) aufweisen und dadurch die geforderte Konstanz der Kapazität in Frage gestellt wäre.
Durch die vorliegende Erfindung wird es nun ermöglicht, auf einfache Weise Glimmerkonden-
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werden. Es ist klar, dass zufolge der Hintereinanderschaltung mehrerer Teilkondensatoren die Entfernung eines Teiles des zu einem Kondensatorteil gehörenden Metallbelages nur eine sehr geringe Veränderung der Gesamtkapazität des Kondensators verursacht, da die an sich, d. h. bloss im Hinblick auf den in Betracht kommenden Teilkondensator, immerhin recht erhebliche Kapazitätsänderung, zufolge der Reihenschaltung mehrerer Teilkondensatoren, sieh nur im entsprechend reduzierten Ausmass auf die resultierende Kapazität auswirkt.
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Mica capacitor.
In modern radio technology, capacitors with a very small capacity, 15 cm and below, are required. Particularly high demands are made on such capacitors with regard to the constancy of the capacitance, the tightest tolerances of the capacitance values (up to + 1%) and the lowest possible loss values.
For capacities that are not less than about 15 cm, those mica capacitors have proven to be effective in which a metal coating is attached to each side of the mica plate, whereby these metal coatings are arranged in such a way that only part of their surface is directly opposite one another . By enlarging or reducing the opposite parts of the coverings, different capacities can be achieved. However, you cannot go below a certain limit, since if the opposing parts of the coverings are chosen to be very small, large variations in the production are inevitable, which contradicts the requirement for the lowest possible tolerance.
Reducing the capacitance of such capacitors by using a thicker mica plate is not acceptable, because thicker mica plates have layers and bubbles (air inclusions) and this would jeopardize the required constancy of the capacitance.
The present invention now makes it possible, in a simple manner, to mica condensate
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will. It is clear that as a result of the series connection of several partial capacitors, the removal of part of the metal coating belonging to a capacitor part causes only a very small change in the total capacitance of the capacitor, since the per se, i. H. only with regard to the partial capacitor in question, after all a considerable change in capacitance, due to the series connection of several partial capacitors, only affects the resulting capacitance to a correspondingly reduced extent.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT150465T | 1935-11-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
AT150465B true AT150465B (en) | 1937-08-25 |
Family
ID=3646155
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AT150465D AT150465B (en) | 1935-11-27 | 1935-11-27 | Mica capacitor. |
Country Status (1)
Country | Link |
---|---|
AT (1) | AT150465B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6023408A (en) * | 1996-04-09 | 2000-02-08 | The Board Of Trustees Of The University Of Arkansas | Floating plate capacitor with extremely wide band low impedance |
-
1935
- 1935-11-27 AT AT150465D patent/AT150465B/en active
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6023408A (en) * | 1996-04-09 | 2000-02-08 | The Board Of Trustees Of The University Of Arkansas | Floating plate capacitor with extremely wide band low impedance |
US6272003B1 (en) | 1996-04-09 | 2001-08-07 | The Board Of Trustees Of The University Of Arkansas | Floating plate capacitor with extremely wide band low impedance |
US6516504B2 (en) | 1996-04-09 | 2003-02-11 | The Board Of Trustees Of The University Of Arkansas | Method of making capacitor with extremely wide band low impedance |
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