DE1284512B - Process for producing a face commutator for electrical machines - Google Patents
Process for producing a face commutator for electrical machinesInfo
- Publication number
- DE1284512B DE1284512B DEB88725A DEB0088725A DE1284512B DE 1284512 B DE1284512 B DE 1284512B DE B88725 A DEB88725 A DE B88725A DE B0088725 A DEB0088725 A DE B0088725A DE 1284512 B DE1284512 B DE 1284512B
- Authority
- DE
- Germany
- Prior art keywords
- steel
- copper
- steel plate
- plate
- copper plate
- 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
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
- H01R39/04—Commutators
- H01R39/06—Commutators other than with external cylindrical contact surface, e.g. flat commutators
-
- 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
- H01R39/08—Slip-rings
- H01R39/10—Slip-rings other than with external cylindrical contact surface, e.g. flat slip-rings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
- H01R43/06—Manufacture of commutators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
- H01R43/06—Manufacture of commutators
- H01R43/08—Manufacture of commutators in which segments are not separated until after assembly
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Motor Or Generator Current Collectors (AREA)
Description
1 21 2
Die Erfindung bezieht sich auf ein Verfahren zur und/oder deren Innendurchmesser größer alsThe invention relates to a method for and / or whose inner diameter is greater than
Herstellung eines Plankommutators für elektrische der der Stahlplatine ist.Manufacture of a flat commutator for electrical that is the steel plate.
Maschinen, insbesondere für Anlaßmotoren und c) Die Segmentstreifen werden am inneren und/Machines, especially for starters and c) The segment strips are attached to the inner and /
Lichtmaschinen von Kraftfahrzeugen, deren Lamel- oder äußeren Umfang der Stahlplatine frei-Alternators of motor vehicles, the lamellar or outer circumference of which is exposed to the steel plate
len senkrecht zur Kommutatorachse an der Stirnseite 5 gestanzt.len punched perpendicular to the commutator axis on the face 5.
einer scheibenförmigen Nabe aus Isolierstoff ange- d) Die Stahlsegmente mit der aufgelöteten Kupferordnet sind. platine werden mit dem Isolierstoff der Kommu-a disk-shaped hub made of insulating material. d) Arranges the steel segments with the soldered-on copper are. board are covered with the insulating material of the commu-
Bei Plankommutatoren dieser Art sind die Korn- tatornabe verpreßt, so daß die Verankerungsmutatorlamellen
so bemessen, daß sie im Hinblick zungen im Isolierstoff eingebettet sind,
auf die elektrische Beanspruchung und auf den Ab- io e) Am äußeren Umfang der Stahlsegmente und
rieb durch die Kohlebürsten die erforderliche Lebens- der Kupferplatine wird in der Mitte eines jeden
dauer des Kommutators gewährleisten und daß sie Stahlsegmentes ein Lötschlitz ausgestanzt,
außerdem ausreichend fest in einem Spannrahmen f) Die Kupferplatine wird jeweils zwischen zwei
oder im Isolierstoff der Kommutatornabe verankert Stahlsegmente in einzelne Kupfersegmente aufwerden
können. Dies wird nach der deutschen 15 geteilt.In flat commutators of this type, the cornator hub is pressed so that the anchoring mutator lamellae are dimensioned in such a way that they are embedded in the insulating material with regard to tongues,
on the electrical load and on the abio e) On the outer circumference of the steel segments and rubbed by the carbon brushes the required life of the copper plate is ensured in the middle of each duration of the commutator and that a soldering slot is punched out of the steel segment,
also sufficiently firmly in a clamping frame f) The copper plate will be able to be anchored between two steel segments or anchored in the insulating material of the commutator hub in individual copper segments. This is divided after the German 15.
Patentschrift 961 910 durch aus der Rückseite der In der Zeichnung ist ein Ausführungsbeispiel des
Kupferlamellen herausgeschälte Verankerungskrallen Erfindungsgegenstandes dargestellt, und zwar zeigt
erreicht und bei einem anderen aus der deutschen F i g. 1 einen nach dem erfindungsgemäßen VerPatentschrift
1101 601 bekannten Plankommutator fahren hergestellten Plankommutator mit einem Ausdurch
kräftige schwalbenschwanzförmige Ansätze an ao schnitt in raumbildlicher Darstellung,
der Rückseite der Kupferlamellen, mit denen sie in Fig. 2 eine Stahlplatine, aus der die Stahlsegmente
einem Rahmen festgespannt sind. Außerdem sind ausgestanzt werden,Patent specification 961 910 by from the back of the In the drawing, an embodiment of the copper lamellae peeled out anchoring claws subject of the invention is shown, namely shows achieved and in another from the German FIG. 1 driving a plane commutator known according to the invention patent specification 1101 601, manufactured plane commutator with a diameter of strong dovetail-shaped projections at ao section in three-dimensional representation,
the back of the copper lamellae, with which they are a steel plate in Fig. 2, from which the steel segments are clamped to a frame. Also are to be punched out
Plankommutatoren bekannt, deren Lamellen mit F i g. 3 einen Schnitt durch die Stahlplatine nachFlat commutators known, the lamellae with F i g. 3 shows a section through the steel plate
schwalbenschwanzförmigen Ansätzen im Isolierstoff der Linie III-III aus Fig. 2, jedoch mit aufgelöteterDovetail-shaped approaches in the insulating material of the line III-III from Fig. 2, but with soldered
der Nabe verankert sind. 35 Kupferplatine, undare anchored to the hub. 35 copper plate, and
Derartige Lösungen sind jedoch aufwendig, da sie F i g. 4 die Kupferplatine mit den freigestanztenHowever, such solutions are expensive because they F i g. 4 the copper plate with the punched out
einen erheblichen lediglich zur Verankerung der La- Stahlsegmenten im Längsschnitt,a considerable one only for anchoring the La steel segments in the longitudinal section,
mellen dienenden Kupferaufwand erfordern, dessen In F i g. 1 ist der Plankommutator einer elektri-Mellen serving require copper expenditure, whose In F i g. 1 is the face commutator of an electrical
Festigkeitseigenschaften aber schlecht sind. sehen Maschine mit 10 bezeichnet. Er wird aus einerBut strength properties are poor. see machine labeled 10. He becomes one
Bei einem anderen bekannten Plankommutator 30 scheibenförmigen Nabe 11 aus Isolierstoff mit an sind die einzelnen Lamellen an den Enden abge- ihrer vorderen Stirnseite angeordneten Lamellen 12 schrägt und auf diese Weise durch radiale Nuten von- gebildet. Zur Entlastung der Nabe 11, die auf die einander getrennt im Isolierstoff der Nabe einge- Antriebswelle einer elektrischen Maschine aufbettet. Die Verankerung ist hierbei völlig unzurei- gepreßt wird, ist die Nabenbohrung durch eine Drahtchend, da die auf den Lamellen schleifenden Kohle- 35 wendelbuchse 17 verstärkt.In another known flat commutator 30, a disk-shaped hub 11 made of insulating material is also included the individual lamellae are lamellae 12 arranged at the ends away from their front end face inclined and formed in this way by radial grooves. To relieve the hub 11, which is on the separated from each other in the insulating material of the hub embedded drive shaft of an electrical machine. The anchoring is completely inadequately pressed, the hub bore is through a small wire, since the carbon spiral bushing 17 rubbing on the lamellas is reinforced.
bürsten die Lamellen im Laufe der Zeit lockern und Bei der Herstellung des Plankommutators 10 wirdbrush the lamellas over time and loosen them during the manufacture of the face commutator 10
seitlich soweit in die Nut drücken können, daß ein von einer Stahlplatine 18 nach Fig. 2 ausgegangen.can press laterally so far into the groove that a steel plate 18 according to FIG. 2 is assumed.
Lamellenschluß auftritt. Außerdem ist die Isolier- Die Stahlplatine 18 wird in radial verlaufende, amLamella closure occurs. In addition, the insulating The steel plate 18 is in a radially extending, am
stoffnabe im Durchmesser wesentlich größer als der äußeren und inneren Umfang zusammenhängendefabric hub in diameter much larger than the outer and inner circumference of the contiguous
Lamellenring, so daß hierfür mehr Platz benötigt 40 Segmentstreifen 13' gestanzt, von denen in F i g. 2Lamellar ring, so that more space is required for this, 40 segment strips 13 'are punched, of which in FIG. 2
wird, als z. B. bei den äußerst eng bemessenen nur einige dargestellt sind. Ferner wird aus jedemis, as z. B. only a few are shown in the extremely narrow. Furthermore, everyone becomes
Anlaßmotoren und Lichtmaschinen zur Verfügung Segmentstreifen 13' eine erste Verankerungszunge 15Starter motors and alternators are available segment strips 13 'a first anchoring tongue 15
steht. freigestanzt und nach hinten aus der Stahlplatine 18stands. punched free and backwards out of the steel blank 18
Schließlich ist es bei verschiedenen Ausführungen herausgebogen. Schließlich werden auch noch vier von Trommelkommutatoren bekannt, für die Lauf- 45 symmetrisch am äußeren Umfang verteilte Führungsfläche der Lamellen Kupfer und für ihre Veranke- rippen 19 aus der Stahlplatine 18 nach vorn herausrung Stahl zu verwenden. Die Erfindung betrifft je- geprägt.Finally, it is bent out in different versions. Finally there will be four known from drum commutators, for the guide surface of the lamellas distributed symmetrically on the outer circumference, and for their anchoring ribs 19 protruding forward from the steel plate 18 Use steel. The invention relates to each coined.
doch ein speziell für die Plankollektorherstellung ent- Hierauf wird die Stahlplatine 18 mit einer Kupferwickeltes Verfahren, bei dem zwar auch die Lamel- platine 20 zusammengelegt und diese — durch die lenlauffläche aus Kupfer und die Verankerungsele- 50 Führungsrippen 19 in der gewünschten Lage gehalmente aus Stahl hergestellt werden sollen, wobei aber ten — in einem Schutzgasofen auf die Stahlplatine 18 die Aufgabe darin besteht, unter Vermeidung der hart aufgelötet (Fig. 3). Nun können die Segmentvorgenannten Nachteile durch genau aufeinander ab- streifen 13' durch Abstanzen der über die Kupfergestimmte Verfahrensschritte eine rationelle, moderne platine 20 überstehenden Ränder der Stahlplatine 18 Massenfertigung von Plankommutatoren zu ermög- 55 an ihrem inneren und äußeren Umfang voneinander liehen, die den heutigen hohen Anforderungen an getrennt und ihre nach innen gerichteten, nunmehr Qualität, Abmessungen und geringem fertigungsseiti- freigestanzten Endabschnitte als zweite Verankerungsgen Aufwand gerecht wird. zungen 15' nach hinten abgebogen werden (F i g. 4). Dies wird erfindungsgemäß durch folgende aufein- In einem weiteren Arbeitsgang wird nun die anderfolgende Verfahrensschritte erreicht: 60 Kupferplatine 20 mit den Stahlsegmenten 13 in einerBut a specially designed for the production of planar collectors. The steel plate 18 is then wound with a copper Method in which, although the lamella board 20 is also collapsed and this - through the lenlauffläche made of copper and the anchoring elements 50 guide ribs 19 in the desired position halmente should be made of steel, but ten - in a protective gas furnace on the steel blank 18 the task is to avoid the brazed (Fig. 3). You can now use the aforementioned segments Disadvantages due to stripping off one another exactly 13 'by punching out that which is tuned over the copper Process steps an efficient, modern blank 20 protruding edges of the steel blank 18 To enable mass production of flat commutators on their inner and outer circumference of each other borrowed, which meet today's high demands on separated and their inward-looking, now Quality, dimensions and low production-side punched-out end sections as a second anchoring effort is fair. Tongues 15 'are bent backwards (Fig. 4). According to the invention, this is carried out by the following steps other following process steps achieved: 60 copper blanks 20 with the steel segments 13 in one
a) Eine Stahlplatine wird in radial verlaufende, am Preßform mit dem Isolierstoff der Kommutatornabe äußeren und/oder inneren Umfang zusammen- 11 verpreßt. Danach wird am äußeren Umfang der hängende Segmentstreifen gestanzt, aus jedem Kupferplatine 20 in der Mitte eines jeden Stahl-Segmentstreifen wird mindestens eine erste Ver- segments 13 ein Lötschlitz 16 ausgestanzt und ankerungszunge freigestanzt und nach hinten 65 schließlich die Kupferplatine 20 zwischen je zwei aus der Stahlplatine herausgebogen. Stahlsegmente 13 in einzelne Kupfersegmente 14 auf-a) A steel plate is in a radial direction, on the compression mold with the insulating material of the commutator hub outer and / or inner circumference pressed together 11. Then on the outer circumference of the hanging segment strips punched out of each copper plate 20 in the middle of each steel segment strip At least one first segment 13, a soldering slot 16 is punched out and anchoring tongue is punched free, and finally, towards the rear 65, the copper plate 20 between each two bent out of the steel plate. Steel segments 13 in individual copper segments 14
b) Auf die Stahlplatine wird eine Kupferplatine gesägt (F i g. 1). Stahlsegment 13 und Kupfersegment aufgelötet, deren Außendurchmesser kleiner 14 bilden dann je eine Kommutatorlamelle 12, beib) A copper plate is sawn onto the steel plate (FIG. 1). Steel segment 13 and copper segment soldered on, the outer diameter of which is smaller than 14 then each form a commutator bar 12, at
der das Kupfer lediglich dem Verschleiß durch die Kohlebürsten und der elektrischen Belastung unterworfen ist, zur Verankerung der Lamellen aber nicht beiträgt.which only subjects the copper to wear and tear from the carbon brushes and electrical loads is, but does not contribute to the anchoring of the slats.
Claims (3)
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEB88725A DE1284512B (en) | 1966-09-01 | 1966-09-01 | Process for producing a face commutator for electrical machines |
US662097A US3538365A (en) | 1966-09-01 | 1967-08-21 | Commutator having disc-shaped base |
GB38726/67A GB1127069A (en) | 1966-09-01 | 1967-08-23 | Improvements in commutators for electrical machines |
ES344645A ES344645A1 (en) | 1966-09-01 | 1967-08-31 | Commutator having disc-shaped base |
FR119745A FR1535394A (en) | 1966-09-01 | 1967-09-01 | Flat manifold for electrical machines and manufacturing process as well as electric machines equipped with said manifold |
JP1970016994U JPS487362Y1 (en) | 1966-09-01 | 1970-02-23 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEB88725A DE1284512B (en) | 1966-09-01 | 1966-09-01 | Process for producing a face commutator for electrical machines |
Publications (1)
Publication Number | Publication Date |
---|---|
DE1284512B true DE1284512B (en) | 1968-12-05 |
Family
ID=6984430
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEB88725A Pending DE1284512B (en) | 1966-09-01 | 1966-09-01 | Process for producing a face commutator for electrical machines |
Country Status (6)
Country | Link |
---|---|
US (1) | US3538365A (en) |
JP (1) | JPS487362Y1 (en) |
DE (1) | DE1284512B (en) |
ES (1) | ES344645A1 (en) |
FR (1) | FR1535394A (en) |
GB (1) | GB1127069A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2408234A1 (en) * | 1977-11-04 | 1979-06-01 | Ducellier & Cie | Vehicle starter motor slip-ring mfr. - uses cutting and folding radial slots in copper disc |
DE2903029A1 (en) * | 1978-01-26 | 1979-08-16 | Mitsuba Electric Mfg Co | COMMUTATOR AND METHOD OF MANUFACTURING SUCH |
EP0063055A2 (en) * | 1981-04-14 | 1982-10-20 | Nihon Radiator Co., Ltd. | Commutator for flat motor and method of making same |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3668450A (en) * | 1970-06-02 | 1972-06-06 | Magnetech Ind Inc | Variable induction device |
US3668449A (en) * | 1970-10-13 | 1972-06-06 | Olin Corp | Aluminum clad copper commutator for use with aluminum armature wire |
US3958141A (en) * | 1975-08-28 | 1976-05-18 | The Lucas Electrical Company Limited | Face commutator |
FR2378383A1 (en) * | 1977-01-19 | 1978-08-18 | Sesame Anc Fils Charles Vuilla | Electric motor flat plate collector mfr. - includes cutting radial strips on metallic discs and folding them back under respective discs through centre hole |
FR2431783A1 (en) * | 1978-07-18 | 1980-02-15 | Sev Marchal | METHOD FOR MANUFACTURING A COLLECTOR FOR A ROTATING ELECTRIC MACHINE AND CORRESPONDING COLLECTOR |
FR2437709A1 (en) * | 1978-09-27 | 1980-04-25 | Paris & Du Rhone | FRONT COLLECTOR FOR ROTATING ELECTRIC MACHINE |
EP0021913A1 (en) * | 1979-06-13 | 1981-01-07 | DUCELLIER & Cie | Face commutator for an electric machine, especially for automotive vehicles |
US4334165A (en) * | 1980-02-19 | 1982-06-08 | General Electric Company | Copper-steel composite commutator bar |
US4823036A (en) * | 1984-12-18 | 1989-04-18 | Roberts Robert E | Disc commutator and brush apparatus for bicycle |
US4704555A (en) * | 1986-06-16 | 1987-11-03 | General Electric Company | Improved disc rotor assembly |
US4835840A (en) * | 1986-06-16 | 1989-06-06 | General Electric Company | Method of making an improved disc rotor assembly |
US5175463A (en) * | 1989-08-07 | 1992-12-29 | Kirkwood Industries | Carbon commutator |
JP2797242B2 (en) * | 1993-12-22 | 1998-09-17 | 株式会社ミツバ | Commutator and manufacturing method thereof |
US5912523A (en) * | 1997-10-03 | 1999-06-15 | Mccord Winn Textron Inc. | Carbon commutator |
US5932949A (en) | 1997-10-03 | 1999-08-03 | Mccord Winn Textron Inc. | Carbon commutator |
US6246143B1 (en) * | 2000-03-20 | 2001-06-12 | Tokyo Parts Industrial Co., Ltd. | Flat coreless vibrator motor using magnetic latching power |
US6359362B1 (en) | 2000-07-31 | 2002-03-19 | Mccord Winn Textron Inc. | Planar commutator segment attachment method and assembly |
US7772739B2 (en) * | 2005-12-27 | 2010-08-10 | Asmo Co., Ltd | Commutator, direct current motor, and manufacturing method of commutator |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE535666C (en) * | 1931-10-14 | Aeg | Process for the production of commutator bars from two materials | |
US1922317A (en) * | 1930-02-01 | 1933-08-15 | Electro Dynamic Company | Commutator |
DE687320C (en) * | 1938-01-28 | 1940-01-27 | Auto Union A G | Collector, preferably plane collector for electrical machines, especially in use in motor vehicles |
CH233442A (en) * | 1941-10-25 | 1944-07-31 | Hermes Patentverwertungs Gmbh | Electric machine. |
DE832634C (en) * | 1949-04-15 | 1952-02-28 | Mach Electrostatiques Sa Des | Collector for electrostatic machines |
DE906242C (en) * | 1942-05-30 | 1954-03-11 | Aeg | Made of two materials, e.g. Copper and iron, existing commutator bridge |
DE961910C (en) * | 1954-12-31 | 1957-04-11 | Bosch Gmbh Robert | Method for manufacturing a commutator from a ring-shaped workpiece |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1219565A (en) * | 1913-12-18 | 1917-03-20 | Kemco Electric Mfg Company | Commutator construction. |
US1537692A (en) * | 1924-08-14 | 1925-05-12 | Westinghouse Electric & Mfg Co | Disk commutator |
US3165828A (en) * | 1960-09-16 | 1965-01-19 | Revere Copper & Brass Inc | Method of roll-bonding copper to steel |
US3244917A (en) * | 1962-07-25 | 1966-04-05 | Gen Motors Corp | Dynamoelectric machine |
US3298803A (en) * | 1965-03-15 | 1967-01-17 | Composite Metal Products Inc | Composite metal article of stainless steel and copper |
-
1966
- 1966-09-01 DE DEB88725A patent/DE1284512B/en active Pending
-
1967
- 1967-08-21 US US662097A patent/US3538365A/en not_active Expired - Lifetime
- 1967-08-23 GB GB38726/67A patent/GB1127069A/en not_active Expired
- 1967-08-31 ES ES344645A patent/ES344645A1/en not_active Expired
- 1967-09-01 FR FR119745A patent/FR1535394A/en not_active Expired
-
1970
- 1970-02-23 JP JP1970016994U patent/JPS487362Y1/ja not_active Expired
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE535666C (en) * | 1931-10-14 | Aeg | Process for the production of commutator bars from two materials | |
US1922317A (en) * | 1930-02-01 | 1933-08-15 | Electro Dynamic Company | Commutator |
DE687320C (en) * | 1938-01-28 | 1940-01-27 | Auto Union A G | Collector, preferably plane collector for electrical machines, especially in use in motor vehicles |
CH233442A (en) * | 1941-10-25 | 1944-07-31 | Hermes Patentverwertungs Gmbh | Electric machine. |
DE906242C (en) * | 1942-05-30 | 1954-03-11 | Aeg | Made of two materials, e.g. Copper and iron, existing commutator bridge |
DE832634C (en) * | 1949-04-15 | 1952-02-28 | Mach Electrostatiques Sa Des | Collector for electrostatic machines |
DE961910C (en) * | 1954-12-31 | 1957-04-11 | Bosch Gmbh Robert | Method for manufacturing a commutator from a ring-shaped workpiece |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2408234A1 (en) * | 1977-11-04 | 1979-06-01 | Ducellier & Cie | Vehicle starter motor slip-ring mfr. - uses cutting and folding radial slots in copper disc |
DE2903029A1 (en) * | 1978-01-26 | 1979-08-16 | Mitsuba Electric Mfg Co | COMMUTATOR AND METHOD OF MANUFACTURING SUCH |
DE2903029C2 (en) * | 1978-01-26 | 1986-09-25 | Mitsuba Electric Mfg. Co., Ltd., Kiryu, Gumma | Commutator and process for its manufacture |
EP0063055A2 (en) * | 1981-04-14 | 1982-10-20 | Nihon Radiator Co., Ltd. | Commutator for flat motor and method of making same |
EP0063055A3 (en) * | 1981-04-14 | 1983-03-30 | Nihon Radiator Co., Ltd. | Commutator for flat motor and method of making same |
Also Published As
Publication number | Publication date |
---|---|
ES344645A1 (en) | 1968-10-16 |
JPS487362Y1 (en) | 1973-02-26 |
US3538365A (en) | 1970-11-03 |
GB1127069A (en) | 1968-09-11 |
FR1535394A (en) | 1968-08-02 |
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