DE664598C - Process for making defects in enamelled wires visible - Google Patents

Process for making defects in enamelled wires visible

Info

Publication number
DE664598C
DE664598C DEA82525D DEA0082525D DE664598C DE 664598 C DE664598 C DE 664598C DE A82525 D DEA82525 D DE A82525D DE A0082525 D DEA0082525 D DE A0082525D DE 664598 C DE664598 C DE 664598C
Authority
DE
Germany
Prior art keywords
enamelled wires
making defects
visible
defects
wire
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
Application number
DEA82525D
Other languages
German (de)
Inventor
Walter Schulze
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.)
AEG AG
Original Assignee
AEG AG
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 AEG AG filed Critical AEG AG
Priority to DEA82525D priority Critical patent/DE664598C/en
Application granted granted Critical
Publication of DE664598C publication Critical patent/DE664598C/en
Expired legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/26Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
    • G01N27/416Systems
    • G01N27/42Measuring deposition or liberation of materials from an electrolyte; Coulometry, i.e. measuring coulomb-equivalent of material in an electrolyte
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/58Testing of lines, cables or conductors

Description

Verfahren zur Sichtbarmachung von Fehlerstellen bei Lackdrähten Die Erfindung bezieht sich auf ein Verfahren zur Sichtbarmachung von Fehlerstellen bei Lackdrähten. Solche Lackdrähte werden beispielsweise als Kernviererleitungen von Fernmeldekabeln verwendet. Da solche Leitungen auch bei Eindringen von Feuchtigkeit in das Kabel betriebsfähig bleiben müssen, so muß man darauf bedacht sein, daß die Lackschicht der Leitungen eine möglichst geringe Fehlerzahl. aufweist.Process for making defects in enamelled wires visible The invention relates to a method for making defects visible Enamelled wires. Such enameled wires are used, for example, as core quadrilaterals from Telecommunication cables used. As such lines also with penetration of moisture in the cable must remain operational, care must be taken that the The lacquer coating of the lines minimizes the number of defects. having.

Zur Bestimmung der Fehler bei Lackdrähten sind schon verschiedene Methoden bjekanntgeworden, sie erfordern jedoch alle besondere und umständliche Einrichtungen und ermöglichen nur die Ermittlung der Gesamtfehlerzahl auf die zu prüfende Länge, wobei noch zu beachten ist, daß dicht benachbarte Stellen je nach dem Auflösungsvermögen der Apparatur .nicht mehr unterschieden werden.There are several ways to determine the defects in enamelled wires Methods become known, but they all require special and cumbersome Facilities and only allow the determination of the total number of errors on the to length to be checked, whereby it should also be noted that closely adjacent places depending on the resolving power of the apparatus. can no longer be distinguished.

Die Erfindung betrifft nun ein Verfahren zur Sichtbarmachung von Fehlerstellen bei Lackdrähten auf elektrolytischem Wege. Der zu prüfende Draht wird an den negativen Pol einer Batterie angeschlossen und durch eine neutrale Alkalisalzläsung geführt, die mit einem geeigneten Farbindikator, z. B. Phenolphthalein, versetzt ist und mit dem positiven Pol der Batterie in Verbindung steht. Die Spannung, die man hierbei zwischen den Draht und die Elektrolytlösung legt, muß natürlich unterhalb der Durchschlagsspannung der Lackschicht liegen. An den Fehlerstellen und Poren der Lackschicht dringt die LÖ-sung ein, und es tritt elektrolytischer Stromdurchgang und Elektrolyse ein, derart, daß an den Fehlerstellen das elektrolytisch gebildete freie Alkalimetall mit dem Wasser die entsprechende Hydroxylverbindungbildet, auf welche der anwesende Indikator durch Farbumschlag reagiert. Das Verfahren gemäß der Erfindung hat den ,großen Vorteil der Einfachheit in der Ausübung und des geringen Aufwandes an Hilfsmitteln (elektrische Batterie von einzi,- gen Volt, Kochsalz, alkoholische Phe p, phthaleinlösung). Sie ist daher zur rase betrieblichen überwachunz sehr aeeiLn@ . Außerdem ist es durch das hohe Auflösungsvermögen auch für laboratoriumsmäßige Forschungsarbeiten über die Natur und den Charakter der Fehlerstelle gut geeignet.The invention now relates to a method for making defects in enamelled wires visible by electrolytic means. The wire to be tested is connected to the negative pole of a battery and passed through a neutral alkali salt solution, which is marked with a suitable color indicator, e.g. B. phenolphthalein, is offset and is connected to the positive pole of the battery. The voltage that is placed between the wire and the electrolyte solution must of course be below the breakdown voltage of the lacquer layer. The solution penetrates the flaws and pores of the lacquer layer, and electrolytic current flow and electrolysis occur in such a way that the electrolytically formed free alkali metal with the water forms the corresponding hydroxyl compound at the flaws, to which the present indicator reacts by changing color. The method according to the invention has the great advantage that it is simple to carry out and that it is inexpensive Aids (electric battery from one, - gen volts, table salt, alcoholic Phe p, phthalein solution). She is therefore to the rush operational monitoring very aeeiLn @. In addition, thanks to its high resolution, it is also well suited for laboratory research work on the nature and character of the fault location.

Claims (1)

PATENTANSPRUCH: Verfahren zur Sichtbarmachung von Fehlerstellen bei Lackdrähten, dadurch gekennzeichnet, daß der zu prüfende Draht durch eine neutrale Alkalisalzlösung ge-'°.führt wird, die mit einem geeigneten Farbindikator, beispielsweise Phenolphthalein, versetzt ist, und daß der Draht mit dem negativen Pol, die Lösung mit dem positiven Pol einer Batterie in leitender Verbindung steht.PATENT CLAIM: Method for making defects visible in Enameled wires, characterized in that the wire to be tested is replaced by a neutral Alkali salt solution is carried out with a suitable color indicator, for example Phenolphthalein, and that the wire with the negative pole, the solution is in conductive connection with the positive pole of a battery.
DEA82525D 1937-04-03 1937-04-03 Process for making defects in enamelled wires visible Expired DE664598C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEA82525D DE664598C (en) 1937-04-03 1937-04-03 Process for making defects in enamelled wires visible

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEA82525D DE664598C (en) 1937-04-03 1937-04-03 Process for making defects in enamelled wires visible

Publications (1)

Publication Number Publication Date
DE664598C true DE664598C (en) 1938-08-31

Family

ID=6948631

Family Applications (1)

Application Number Title Priority Date Filing Date
DEA82525D Expired DE664598C (en) 1937-04-03 1937-04-03 Process for making defects in enamelled wires visible

Country Status (1)

Country Link
DE (1) DE664598C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015102539A1 (en) * 2015-02-23 2016-08-25 Agro Holding Gmbh Method for producing a cushion spring, cushion spring, mattress and upholstered furniture

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015102539A1 (en) * 2015-02-23 2016-08-25 Agro Holding Gmbh Method for producing a cushion spring, cushion spring, mattress and upholstered furniture

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