DE417620C - Process for the production of rotary resistors, potentiometers or the like. - Google Patents
Process for the production of rotary resistors, potentiometers or the like.Info
- Publication number
- DE417620C DE417620C DEB116491D DEB0116491D DE417620C DE 417620 C DE417620 C DE 417620C DE B116491 D DEB116491 D DE B116491D DE B0116491 D DEB0116491 D DE B0116491D DE 417620 C DE417620 C DE 417620C
- Authority
- DE
- Germany
- Prior art keywords
- potentiometers
- winding
- production
- wire winding
- rotary resistors
- 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.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C17/00—Apparatus or processes specially adapted for manufacturing resistors
- H01C17/04—Apparatus or processes specially adapted for manufacturing resistors adapted for winding the resistive element
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Apparatuses And Processes For Manufacturing Resistors (AREA)
- Adjustable Resistors (AREA)
Description
Verfahren zur Herstellung von Drehwiderständen, Potentiometern o. dgl. Bei der Herstellung von Drehwiderständen, Potentiometern o. dgl. pflegt man auf einen Stab aus Isoliermaterial, beispielsweise Hartgummi, eine Drahtwicklung aufzubringen. Der Stab mitsamt der aufgebrachten Wicklung wird dann .in einem Wasserbade erwärmt und in warmem Zustande zu einem nahezu.geschlossenen Ringe gebogen. Nach dem Wiedererkalten behält er dabei ohne weiteres die Ringform.Process for the production of rotary resistors, potentiometers, etc. The like. In the manufacture of rotary resistors, potentiometers or the like on a rod made of insulating material, for example hard rubber, a wire winding to raise. The stick together with the applied winding is then placed in a water bath warmed and, when warm, bent into an almost closed ring. To When it is cooled again, it easily retains its ring shape.
Dieses bekannte Verfahren hat nun den Nachteil, daß bei seiner Durchführung der Widerstandsdraht eine mechanische Dehnung erfährt. Er sitzt infolgedessen bei dem fertigen Widerstand nur lose auf dem Isolierkörper, und beim Gebrauch schieben sich daher die benachbarten Windungen leicht übereinander. Aus diesem Grunde hat man es vielfach vorgezogen, trotzdem die Herstellung dadurch wesentlich umständlicher wird, den Wicklungsdraht erst aufzuwickeln, nachdem der Wicklungsträger ringförmig gebogen ist.This known method now has the disadvantage that when it is carried out the resistance wire experiences a mechanical stretch. As a result, he sits by the finished resistor just loosely on the insulator, and slide when in use therefore the adjacent turns are slightly above one another. That is why it is often preferred, but the production is much more complicated is to wind up the winding wire only after the winding support is annular is bent.
Gemäß der Erfindung läßt sich aber auch dann, wenn der Wicklungsträger erst nach dem Aufbringen der Wicklung in die Ringform übergeführt wird, ein festes Sitzen der Wicklung mit Sicherheit erzielen. Zu diesem Zwecke wird für den Biiegungsprozeß durch -Jie Wicklung ein elektrischer Strom von solcher Stärke hindurchgeschickt, daß die hierdurch erzielte thermische Dehnung größer ist als die erforderliche mechanische. Beim Abkühlen zieht sich dann der Dralit zusammen, so daß er nach Beendigung des Verfahrens straft auf dem Isolierring sitzt.According to the invention, however, it can also be used when the winding support is only converted into the ring shape after the winding has been applied, a solid one Achieve seating of the winding with certainty. For this purpose it is used for the bending process an electric current of such strength passed through the winding, that the thermal expansion achieved thereby is greater than the required mechanical. When cooling down, the Dralit then contracts, so that after the end of the Procedure penalized sitting on the insulating ring.
Die Erhitzung der Drahtwicklung kann man im übrigen zugleich noch benutzen, um den Isolierstab dadurch auf die zum Biegen erforderliche erhöhte Temperatur zu bringen, so daß die Erwärmung in einem besbnderen Wasserbade wegfällt. Es ist darnach also nur noch erforderlich, die Drahtwicklung nach ihrem Aufbringen auf den Isolierstab durch einen elektrischen Strom zu beschicken und nach Erreichung der erforderlichen Temperatur die Biegung vorzunehmen. Das läßt sich gegebenenfalls auf einfache Weise auch maschinell durchführen.The heating of the wire winding can also be done at the same time use to bring the insulating rod to the elevated temperature required for bending to bring, so that the warming in a better water bath is eliminated. It is after that it is only necessary to open the wire winding after it has been applied to charge the insulating rod with an electric current and after reaching to make the bend at the required temperature. That can be done if necessary can also be carried out by machine in a simple manner.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEB116491D DE417620C (en) | 1924-11-11 | 1924-11-11 | Process for the production of rotary resistors, potentiometers or the like. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEB116491D DE417620C (en) | 1924-11-11 | 1924-11-11 | Process for the production of rotary resistors, potentiometers or the like. |
Publications (1)
Publication Number | Publication Date |
---|---|
DE417620C true DE417620C (en) | 1925-08-15 |
Family
ID=6994318
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEB116491D Expired DE417620C (en) | 1924-11-11 | 1924-11-11 | Process for the production of rotary resistors, potentiometers or the like. |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE417620C (en) |
-
1924
- 1924-11-11 DE DEB116491D patent/DE417620C/en not_active Expired
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