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
Application number
Other languages
German (de)
Inventor
Kurt Slawik
Walter Schick
Original Assignee
Kremenezky Ag Joh
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 Kremenezky Ag Joh filed Critical Kremenezky Ag Joh
Application granted granted Critical
Publication of AT150465B publication Critical patent/AT150465B/en

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- 
 EMI1.1 
 

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 EMI2.1 
 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
 EMI1.1
 

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 EMI2.1
 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)

PATENT-ANSPRUCH : Aus einer Mehrzahl von hintereinandergeschalteten Teilkapazitäten gebildeter Glimmerkondensator sehr kleiner Kapazität, dadurch gekennzeichnet, dass sämtliche der in grösserer Anzahl als zwei vorhandenen Metallbeläge des Kondensators auf einem einzigen Glimmerplättchen angebracht sind. EMI2.2 PATENT CLAIM: A mica capacitor of very small capacitance formed from a plurality of partial capacitances connected in series, characterized in that all of the metal coverings of the capacitor present in greater numbers than two are attached to a single mica plate. EMI2.2
AT150465D 1935-11-27 1935-11-27 Mica capacitor. AT150465B (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (3)

* Cited by examiner, † Cited by third party
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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