EP0246254B1 - Procede de fabrication de resistances de potentiometres - Google Patents

Procede de fabrication de resistances de potentiometres Download PDF

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Publication number
EP0246254B1
EP0246254B1 EP86906333A EP86906333A EP0246254B1 EP 0246254 B1 EP0246254 B1 EP 0246254B1 EP 86906333 A EP86906333 A EP 86906333A EP 86906333 A EP86906333 A EP 86906333A EP 0246254 B1 EP0246254 B1 EP 0246254B1
Authority
EP
European Patent Office
Prior art keywords
winding
potentiometer
core
wire
producing
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 - Lifetime
Application number
EP86906333A
Other languages
German (de)
English (en)
Other versions
EP0246254A1 (fr
Inventor
Kurt Oelsch
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
OELSCH KG
Original Assignee
OELSCH KG
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 OELSCH KG filed Critical OELSCH KG
Publication of EP0246254A1 publication Critical patent/EP0246254A1/fr
Application granted granted Critical
Publication of EP0246254B1 publication Critical patent/EP0246254B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C10/00—Adjustable resistors
    • H01C10/30—Adjustable resistors the contact sliding along resistive element
    • H01C10/301—Adjustable resistors the contact sliding along resistive element consisting of a wire wound resistor
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C17/00—Apparatus or processes specially adapted for manufacturing resistors
    • H01C17/22—Apparatus or processes specially adapted for manufacturing resistors adapted for trimming
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49082—Resistor making
    • Y10T29/49087—Resistor making with envelope or housing
    • Y10T29/49096—Resistor making with envelope or housing with winding
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49863—Assembling or joining with prestressing of part
    • Y10T29/49874—Prestressing rod, filament or strand

Definitions

  • the invention relates to a method for producing an annular potentiometer resistor with a winding which has a preselected electrical resistance.
  • a potentiometer winding according to FR-A-922 860 results in a cylindrical or toric contact surface.
  • complex grinder designs are required (e.g. according to the type of DE-A-34 13 741. This makes the potentiometers more expensive.
  • GB-A-567 129 discloses a method for producing strain gauges.
  • Strain gauges contain a wire that is attached to a paper support and that is glued to the surface of a part by means of a special adhesive, whose elongation is to be measured. When the examined part is stretched, the wire is also stretched and changes its electrical resistance. This change in resistance is usually converted into an electrical signal by means of a bridge circuit. In order to make the change in resistance that can be achieved with a given stretch and a given length as large as possible, the wire in such strain gauges is laid in a zigzag shape.
  • GB-A-567 129 now relates to a method for producing such strain gauges as economically as possible. For this purpose, the wire is wound in a layer helically on a cylindrical paper roll and then flattened together with the paper roll.
  • DE-A-1 816 517 and GB-A-1 256 527 which have the same content, show a method and an arrangement for producing straight resistors of oval profile.
  • a winding is tightly wound on a straight, solid core. This core is then deformed between a pair of rollers. The pitch of the winding is changed according to the deformation. The windings of the winding are partially pressed into the core. The cross-section and the values of the winding remain essentially unchanged.
  • the invention has for its object to produce a potentiometer winding with little effort so that a contact surface is created, which is also with a grinder of less complex construction, e.g. a broom grinder, always ensures safe contact.
  • a grinder of less complex construction e.g. a broom grinder
  • a flat contact surface is thereby obtained, against which a broom grinder, that is to say a grinder with a plurality of contact fingers arranged closely next to one another and connected to one another, can rest over its entire width.
  • a broom grinder that is to say a grinder with a plurality of contact fingers arranged closely next to one another and connected to one another, can rest over its entire width.
  • the winding can be easily applied evenly to the core with a circular cross-section.
  • the deformation causes the wire to stretch.
  • the resistance of the potentiometer winding increases. But that is predictable. It has been shown that this deformation does not affect the function of the potentiometer winding.
  • Fig. 1 10 is a sliced-toric, solid core, which has a circular cross-section. On this core 10 is more common and therefore a winding 12 is wound, not shown here.
  • the wound core 10 with the winding 12 is then deformed by pressure between flat surfaces 14 and 16. This is indicated by arrow 18.
  • a potentiometer resistor 32 as shown in FIG. 3: the cross section of the core 10 is deformed in such a way that it has two parallel, straight sides 20 and 22 which are connected by a few arches 24 and 26.
  • the winding 12 is deformed accordingly.
  • the winding 12 thus forms an annular, essentially planar contact surface 28, which is indicated in FIG. 3 by the dashed lines.
  • a conventional broom grinder 30, as indicated in FIG. 3, can rest over its entire width on this contact surface. As a result, reliable contact is always guaranteed even with such a grinder.
  • FIG. 4 is an exploded perspective view of a potentiometer which is constructed with a potentiometer resistor 32 according to FIG. 3.
  • a resistance socket 34 made of insulating plastic has a central opening 36 and two concentric annular grooves 38 and 40.
  • the potentiometer resistor 32 from FIG. 3 with the flat contact surface 28 is seated in the outer ring groove 38.
  • a gold-plated slip ring 42 is seated in the inner ring groove 40.
  • a grinder carrier 44 is rotatably supported with a hub part 46 in an annular groove 46 which surrounds the central opening.
  • the grinder support 44 is a plastic part of a circular basic shape with three cutouts 48, 50, 52 offset at approximately 90 ° from one another at the edge.
  • two broom grinders 30 (FIG. 3) and 54 are attached, which are electrically connected to one another.
  • broom grinders are grinders which end in a plurality of adjacent, electrically connected fingers. These fingers rest on the potentiometer resistor 32 or the slip ring 42. This configuration ensures that at least one finger always makes contact with the potentiometer resistor 32 or the slip ring 42.
  • the broom grinder 30 lies against the flat contact surface 28 of the potentiometer resistor 32.
  • the broom grinder 54 rests on a likewise flat contact surface of the gold-plated slip ring 54.

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Manufacturing & Machinery (AREA)
  • Adjustable Resistors (AREA)
  • Details Of Resistors (AREA)

Abstract

Un enroulement (12) est enroulé autour d'un noyau (10) à section tranversale circulaire. Ensuite le noyau enroulé (10) est déformé par pression entre deux surfaces plates jusqu'à créer une surface plate de contact, qui permet l'utilisation, par exemple, d'un balai de contact.

Claims (1)

  1. Procédé déstiné à fabriquer une résistance de potentiomètre avec un enroulement ayant une résistance électrique préchoisie, avec les étapes de procédé:
    (a) fabriquer un noyau annulaire solide,
    (b) enrouler un enroulement en fil sur ce noyau, la résistance électrique de cet enrouelement en fil étant inférieure à ladite résistance préchoisie,
    (c) déformer ensuite le noyau solide avec l'enroulement appliqué sur celui par compression entre des surfaces planes parallèles afin de produire des surfaces de contact opposées plates, dont l'une est déstinée comme surface de contact pour un curseur de sorte que le fil de l'enroulement en fil est étiré dans une telle mesure que l'enrouement en fil adopte ladite résistance électrique préchoisie.
EP86906333A 1985-11-29 1986-11-07 Procede de fabrication de resistances de potentiometres Expired - Lifetime EP0246254B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3542227 1985-11-29
DE19853542227 DE3542227A1 (de) 1985-11-29 1985-11-29 Verfahren zur herstellung von potentiometerwiderstaenden

Publications (2)

Publication Number Publication Date
EP0246254A1 EP0246254A1 (fr) 1987-11-25
EP0246254B1 true EP0246254B1 (fr) 1990-06-13

Family

ID=6287175

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86906333A Expired - Lifetime EP0246254B1 (fr) 1985-11-29 1986-11-07 Procede de fabrication de resistances de potentiometres

Country Status (5)

Country Link
US (1) US4811479A (fr)
EP (1) EP0246254B1 (fr)
JP (1) JPS63501835A (fr)
DE (2) DE3542227A1 (fr)
WO (1) WO1987003417A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08251749A (ja) * 1995-03-03 1996-09-27 Sumitomo Wiring Syst Ltd 巻線型抵抗電線の端末処理方法

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB270908A (en) * 1926-06-01 1927-05-19 Morgan Crucible Co Improvements relating to electrical resistances or rheostats
US1767716A (en) * 1927-06-27 1930-06-24 Central Radio Lab Electrical resistance and method of making same
DE732183C (de) * 1938-11-24 1943-02-24 Entpr S Electr Fribourgeoises Verfahren zur Herstellung elektrischer Heizwiderstaende
US2221235A (en) * 1939-03-16 1940-11-12 Ward Leonard Electric Co Resistor unit
GB566971A (en) * 1943-03-31 1945-01-22 Harold Edward Bayliss Improvements in and relating to methods of manufacturing electrical resistances
US2419952A (en) * 1943-09-15 1947-05-06 Western Electric Co Method of mounting and adjusting potentiometer elements
US3413588A (en) * 1967-10-11 1968-11-26 Bourns Inc Single-turn rotary variable resistor
DE1816517B2 (de) * 1967-12-22 1972-01-20 Remix Radiotechmkai Vallalat, Budapest Vorrichtung zur herstellung von einlagigen elektrischen wicklungen

Also Published As

Publication number Publication date
WO1987003417A1 (fr) 1987-06-04
EP0246254A1 (fr) 1987-11-25
US4811479A (en) 1989-03-14
JPS63501835A (ja) 1988-07-21
DE3542227A1 (de) 1987-06-04
DE3672011D1 (de) 1990-07-19

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