DE1011976B - Carbon brush, especially for small machines - Google Patents

Carbon brush, especially for small machines

Info

Publication number
DE1011976B
DE1011976B DER17613A DER0017613A DE1011976B DE 1011976 B DE1011976 B DE 1011976B DE R17613 A DER17613 A DE R17613A DE R0017613 A DER0017613 A DE R0017613A DE 1011976 B DE1011976 B DE 1011976B
Authority
DE
Germany
Prior art keywords
carbon brush
small machines
pin
brush
carbon
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.)
Pending
Application number
DER17613A
Other languages
German (de)
Inventor
Dr Fritz Schroeter
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.)
Ringsdorff Werke GmbH
Original Assignee
Ringsdorff Werke GmbH
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 Ringsdorff Werke GmbH filed Critical Ringsdorff Werke GmbH
Priority to DER17613A priority Critical patent/DE1011976B/en
Publication of DE1011976B publication Critical patent/DE1011976B/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R39/00—Rotary current collectors, distributors or interrupters
    • H01R39/02—Details for dynamo electric machines
    • H01R39/58—Means structurally associated with the current collector for indicating condition thereof, e.g. for indicating brush wear

Landscapes

  • Motor Or Generator Current Collectors (AREA)

Description

DEUTSCHESGERMAN

Das Patent 919 248 betrifft eine Kohlebürste, insbesondere für Kleinmaschinen, die unter der Wirkung einer einzigen im oberen Teil auf Druck, im unteren Teil auf Zug beanspruchten Wendelfeder in Verbindung mit einem sich gegen die Bürste abstützenden Isolierstück nach einem bestimmten Verschleiß ihre Stromzufuhr selbsttätig unterbricht. Die Erfindung bezweckt eine weitere Ausbildung des obigen Patentes. Bild 1 zeigt eine Ausführung der Abschaltvorrichtung gemäß dem Patent 919 248. Wird das als Abschaltstift 1 ausgebildete Isolierstück aus einem organischen Kunststoff ·— etwa Hartpapier — hergestellt, so kann es bei hohen Stromwendertemperaturen vorkommen, daß das untere Ende des Stiftes zu verkohlen beginnt, wenn die Bohrung 2 in der Kohle 4 vom Stromwender angeschliffen wird, so daß der Stift 1 mit ihm in unmittelbare Berührung kommt und daher durch Reibungswärme zusätzlich erhitzt wird. Das untere Stiftende nutzt sich dann ab, ehe die Bohrung 2 so weit aufgeschliffen ist, daß der Stift 1 hindurchtreten kann. Hierdurch entspannt sich das auf Zug beanspruchte untere Ende der Wendelfeder 3j und die Abschaltvorrichtung spricht nicht an.The patent 919 248 relates to a carbon brush, in particular for small machines, which under the effect a single helical spring loaded in compression in the upper part and in tension in the lower part with an insulating piece supported against the brush after a certain amount of wear Power supply interrupts automatically. The invention aims at a further development of the above patent. Figure 1 shows an embodiment of the shutdown device according to patent 919,248 Shut-off pin 1 formed insulating piece made of an organic plastic - for example hard paper - made, at high commutator temperatures it can happen that the lower end of the pin closes char begins when the hole 2 in the coal 4 is ground by the commutator, so that the Pen 1 comes into direct contact with it and is therefore additionally heated by frictional heat will. The lower end of the pin then wears off before the hole 2 is ground so far that the Pin 1 can pass through. As a result, the lower end of the helical spring, which is subjected to tensile stress, relaxes 3j and the shutdown device does not respond.

Abschaltstifte aus keramischem Material haben diesen Mangel zwar nicht, sie zerkratzen aber unter Umständen die Stromwenderoberfläche beim Entstehen der Durchtrittsöffnung in der Bürste kurz vor dem Abschalten. Damit wird aber ein Vorteil der Abschaltkohle in Frage gestellt, nämlich die Möglichkeit, die nächste Bürste auf den Stromwender setzen zu können, ohne ihn vorher überholen zu müssen.Shutdown pins made of ceramic material do not have this defect, but they scratch under Under certain circumstances, the commutator surface shortly before the emergence of the passage opening in the brush switching off. However, this calls into question one advantage of the switch-off coal, namely the possibility of to be able to put the next brush on the commutator without having to overtake it first.

Erfindungsgemäß wird das untere Ende des aus organischem Material bestehenden Abschaltstiftes nach oben verjüngt ausgebildet. Bild 2 zeigt ein Beispiel Beginnt jetzt der Stift am unteren Ende zu ver-Kohlebürste,
insbesondere für KleinmaschinenAccording to the invention, the lower end of the cut-off pin made of organic material is tapered upwards. Fig. 2 shows an example. If the pin at the lower end now begins to brush,
especially for small machines

Zusatz zum Patent 919248Addendum to patent 919248

Anmelder:Applicant:

Ringsdorff-Werke G.m.b.H.,Ringsdorff-Werke G.m.b.H.,

Bad Godesberg-Mehlem,Bad Godesberg-Mehlem,

Königswinterer Str. 1Königswinterer Str. 1

Dr. Fritz Schröter, Bad Godesberg,
ist als Erfinder genannt wordenDr. Fritz Schröter, Bad Godesberg,
has been named as the inventor

kohlen, so nimmt gleichzeitig seine Breite b ab, so daß er nun sogleich durch das angeschliffene Loch hindurchtreten und die Bürste abschalten kann. carbon, its width b decreases at the same time, so that it can now pass through the ground hole and switch off the brush.

Claims (1)

PATENTANSPRUCH:PATENT CLAIM: Kohlebürste, insbesondere für Kleinmaschinen, die unter der Wirkung einer einzigen, im oberen Teil auf Druck, im unteren Teil auf Zug beanspruchten Wendelfeder nach einem bestimmten Verschleiß ihre Stromzufuhr selbsttätig unterbricht, gemäß Patent 919 248, mit einem Abschaltstift aus organischem Material, dadurch gekennzeichnet, daß sich das untere auf dem Boden der Kohlebohrung aufliegende Ende des Stiftes nach oben verjüngt.Carbon brush, especially for small machines that are under the action of a single, in the upper Partly on compression, in the lower part on tension, helical spring stressed according to a certain Wear interrupts their power supply automatically, according to patent 919 248, with a cut-off pin made of organic material, characterized in that the lower one is on the bottom of the Carbon bore on the end of the pin tapers upwards. Hierzu 1 Blatt Zeichnungen1 sheet of drawings
DER17613A 1955-10-19 1955-10-19 Carbon brush, especially for small machines Pending DE1011976B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DER17613A DE1011976B (en) 1955-10-19 1955-10-19 Carbon brush, especially for small machines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DER17613A DE1011976B (en) 1955-10-19 1955-10-19 Carbon brush, especially for small machines

Publications (1)

Publication Number Publication Date
DE1011976B true DE1011976B (en) 1957-07-11

Family

ID=7400017

Family Applications (1)

Application Number Title Priority Date Filing Date
DER17613A Pending DE1011976B (en) 1955-10-19 1955-10-19 Carbon brush, especially for small machines

Country Status (1)

Country Link
DE (1) DE1011976B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2801839A1 (en) * 1978-01-17 1979-07-19 Bosch Gmbh Robert SHUT-OFF CARBON BRUSH

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2801839A1 (en) * 1978-01-17 1979-07-19 Bosch Gmbh Robert SHUT-OFF CARBON BRUSH

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