US3014144A - Disc commutators for fractional horsepower motors - Google Patents

Disc commutators for fractional horsepower motors Download PDF

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Publication number
US3014144A
US3014144A US736770A US73677058A US3014144A US 3014144 A US3014144 A US 3014144A US 736770 A US736770 A US 736770A US 73677058 A US73677058 A US 73677058A US 3014144 A US3014144 A US 3014144A
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US
United States
Prior art keywords
disc
commutator
carrier
segments
slots
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
US736770A
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English (en)
Inventor
Fleischmann Johann
Schmitt Daniel
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.)
Gebr Fleischman GmbH and Co KG
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Gebr Fleischman GmbH and Co KG
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Filing date
Publication date
Application filed by Gebr Fleischman GmbH and Co KG filed Critical Gebr Fleischman GmbH and Co KG
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Publication of US3014144A publication Critical patent/US3014144A/en
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Expired - Lifetime legal-status Critical Current

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    • 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
    • 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

Definitions

  • the invention relates to a disc commutator for fractional horsepower electric motors, especially toy motors, and is intended chiefly to create a commutator which is easy to adjust and which, as compared with the known disc commutators, effects an improvement in the commutation as the brushes pass from one commutator segment to another.
  • thermo-setting adhesive for example an ethoxyline resin, is preferably used for this purpose.
  • the carrier from a clay, such as steatite. It is particularly advantageous to construct the disc commutator as a disc-shaped carrier with segment-shaped commutator elements and, according to another feature of the invention, to provide in one face of the carrier an annular groove in which the commutator segments are fitted.
  • another feature of the invention consists in providing in the carrier through apertures at the point of transition of the commutator segments.
  • a disc commutator which is particularly advantageous is obtained where the commutator segments are formed as an annular disc with radial incisions or slots determining the size of the segments in having connecting webs bridging the gaps between the segments, the webs being removed after the annular disc has been stuck on the carrier.
  • FIG. 1 is a front elevation showing a carrier of ceramic material
  • FIG. 2 is a section through the carrier taken on line II-II of FIG. 1;
  • FIG. 3 is a front view of a finished commutator
  • FIG. 4 is a section on line IV-IV of FIG. 3;
  • FIG. 5 shows a modified form of construction in side elevation
  • FIG. 6 is a front elevation of the carrier of the commutator illustrated in FIG. 5;
  • FIG. 7 is a front elevation of the commutator ring disc of this construction
  • FIGURE 7a is a fragmentary view of the commutator disc of FIGURE 7 mounted on a carrier disc and having the bridging web interrupted
  • FIG. 8 shows in front elevation a disc serving as insulating bearing surface on the carrier of the commutator illustrated in FIG. 5.
  • a carrier 1 is composed of ceramic material, for example steatite. It is in the form of a disc and has on one of its faces an annular groove 2. This groove 2 extends into equally spaced peripheral slots 3, 4 and 5. Segment-shaped commutator elements 6, 7 and 8 can be introduced into this annular groove 2. These segments have lugs 9, 10 and 11 which, when the segments are inserted in the annular groove, fit in the slots 3, 4 and 5 and thus determine and ensure the correct relative positions of segments in relation to the carrier. As shown in FIGURE 3, the segments 6, 7 and 8 are limited in angular extent to provide radial gaps between adjacent segments, as shown at 12, 13 and 14. The segments 6, 7 and 8 are also held on the carrier 1 by means of a thermo-setting adhesive, such as an ethoxyline resin.
  • a thermo-setting adhesive such as an ethoxyline resin.
  • apertures 15, 16 and 17 are provided in the carrier 1 under the gaps 12, 13 and 14. These apertures enable any particles of dust or carbon which may enter the gaps 12, 13 and 14 to be flung out of the commutator by centrifugal force in time to prevent as far as possible the formation of current bridges between the individual segments.
  • a hub which consists of a cylindrical part 19 and a collar 20.
  • the cylindrical part passes through a central bore 21 in the carrier 1 whereas the collar 20 serves for fixing the hub on the carrier in that it is stuck firmly thereon.
  • the construction is otherwise such that the commutator segments 6, 7 and 8 project on their free side beyond the carrier including the hub collar in the direction of the longitudinal axis of the motor.
  • the lugs 9, 10 and 11 on the commutator segments may also serve as soldering lugs for connecting the beginnings and ends of the armature winding.
  • the disc commutator illustrated in FIGS. 5 to 8 comprises a carrier 22, a support or bearing surface 23 and commutator segments 24a, 24b and 240.
  • the carrier 22 is made from sheet metal and has a hub 25 produced by the cupping or drawing method and by means of which it is fixed on the motor shaft 26.
  • the carrier 22 is provided with slots 27 at the points where the individual commutator segments terminate, which slots are wider than the relative distance or gaps between the individual commutator segments after they have been fitted on the carrier.
  • Slots are also provided in the disc 23 of insulating material and coincide with the slots 27 after the disc has been connected with the carrier and are designated by 28 on the drawing.
  • the disc 23 is stuck or cemented onto the carrier 22.
  • the slots 28 are narrower than the slots 27 but wider than the relative spacing or gaps between the commutator segments.
  • the commutator segments 24 are connected with the other constructional elements ofthe commutator by cementing. As shown in FIG. 7, they are formed by an annular disc with equally spaced radial slots or incisions 29, each slot being bridged by a web 30 which extends beyond the outer periphery of the commutator segments. After the disc 23 has been stuck on the carrier 22, the disc of FIGURE 7 is stuck on the disc 23. Its position is such that the incisions 29 coincide with the slots 27 and 28.
  • the connecting webs 30 which still hold the ring disc together (FIG. 7) project beyond the periphery of the disc 23 after it has been stuck thereon. They are subsequently removed. Consequently both the individual commutator segments 24 and also the commutator slots 29 are positively determined in size and direction.
  • connecting webs 30 are severed only at one end they can be used as soldering lugs (see lug 30a in FIG- URE 7a) so that separate soldering lugs 31, which would otherwise be necessary, can be dispensed with.
  • the intermediate layer 23 it is not necessary to construct the intermediate layer 23 as a separate disc if the adhesive used is itself used for forming the insulating layer or if an oxide layer is produced on the carrier and electrically insulates the commutator segments.
  • the carrier may be made from aluminum and its surface directed towards the segments may be provided with an oxide skin which can be produced by anodal oxidation.
  • a disc commutator blank for fractional horsepower electric motors, especially toy motors comprising a carrier body in the form of a circular disc, a plurality of commutator segments comprising an integral ring of conductive material adhesively secured to the disc, said ring having inner and outer peripheries and arcuately spaced radial slots extending from the inner periphery to a position adjacent the outer periphery and defining between them the arcuate size of the commutator segments, said ring also including web, portions located outside of the outer periphery of the segment portions and bridging said slots, whereby separation of the webs bridging the slots at the outer periphery would provide spaced commutator segments,
  • a disc commutator in accordance with claim 7 in which the carrier disc is of aluminum and the insulating layer is an anodic layer of aluminum oxide.
  • a method of making a disc commutator for fractional horsepower motors, especially toy motors comprising the steps of adhesively securing to the face of a circular disc an integral ring of conductive material having equal arcuately spaced outer peripheral portions extending radially outward of the periphery of the disc and slots extending radially outward from the inner periphery of the ring beyond the periphery of the disc into the outwardly extending portions respectively, and severing one end of each such portion to form separated commutator segments and an integral soldering lug for each segment.
  • a laminated disc commutator for small electric motors comprising a carrier body formed of a disc of sheet metal having angularly spaced radial slots formed therein and having an insulating layer bonded to one face thereof, and sector-shaped commutator segments formed from sheet metal and being adhesively bonded to said insulating layer, said commutator segments being equally spaced about the axis of said carrier disc and having gaps between adjacent segments, which gaps coincide with the radial slots in said carrier body.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Motor Or Generator Current Collectors (AREA)
US736770A 1957-06-08 1958-05-21 Disc commutators for fractional horsepower motors Expired - Lifetime US3014144A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEF0023222 1957-06-08
DEF23442A DE1158164B (de) 1957-06-08 1957-07-11 Scheibenkommutator fuer elektrische Spielzeugmotoren u. dgl.

Publications (1)

Publication Number Publication Date
US3014144A true US3014144A (en) 1961-12-19

Family

ID=25974036

Family Applications (1)

Application Number Title Priority Date Filing Date
US736770A Expired - Lifetime US3014144A (en) 1957-06-08 1958-05-21 Disc commutators for fractional horsepower motors

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US (1) US3014144A (de)
CH (1) CH363082A (de)
DE (1) DE1158164B (de)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3449827A (en) * 1966-10-10 1969-06-17 Gen Motors Corp Method of making commutator assembly
US3473062A (en) * 1968-04-05 1969-10-14 Eletrogeraete Vvb Carbon commutator
US3473063A (en) * 1968-04-05 1969-10-14 Eletrogeraete Vvb Carbon commutators
US3486056A (en) * 1967-03-09 1969-12-23 Eastman Kodak Co Commutator
US3502915A (en) * 1966-11-02 1970-03-24 Etablis Aesup Electric dry shaver with sloping lap joint connecting front and rear casing sections
US3525008A (en) * 1965-12-06 1970-08-18 Robert P Burr Electrical wire wound axial air-gap machines
US3805103A (en) * 1970-09-18 1974-04-16 Philips Corp Commutator for a small electrodynamic machine
FR2548471A1 (fr) * 1983-06-28 1985-01-04 Paris & Du Rhone Collecteur frontal perfectionne
FR2549305A1 (fr) * 1983-07-13 1985-01-18 Barbe Jean Procede et installations pour la fabrication de collecteurs, destines aux machines tournantes electriques

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1189193B (de) 1957-11-18 1965-03-18 Licentia Gmbh Kommutator fuer Kleinstmaschinen und Verfahren zu seiner Herstellung
FR2412184A1 (fr) * 1977-12-15 1979-07-13 Paris & Du Rhone Perfectionnements aux collecteurs de machines tournantes dynamoelectriques et procede pour leur mise en oeuvre
DE102005028789A1 (de) * 2005-06-16 2006-12-28 Kautt & Bux Gmbh Kommutator, zugehöriger Tragkörper sowie Verfahren zur Herstellung eines Kommutators

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE196277C (de) *
US1901955A (en) * 1931-02-21 1933-03-21 Lionel Corp Method of making commutators
US2818518A (en) * 1954-03-17 1957-12-31 Gen Electric Electric motor and method of manufacture therefor
US2823286A (en) * 1954-07-12 1958-02-11 John T Beck Contacts for electrical circuits and methods for making same

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE344231C (de) * 1919-04-30 1921-11-18 Bosch Robert Ag Verfahren zur Herstellung von Kollektoren
DE541827C (de) * 1923-06-24 1932-01-16 Siemens Schuckertwerke Akt Ges Stromwender fuer elektrische Maschinen mit hoher Lamellenspannung
DE466637C (de) * 1925-01-11 1928-10-09 Auergesellschaft Gmbh Verfahren zum automatischen Herstellen von Kollektoren
DE743900C (de) * 1938-11-04 1944-01-05 Alfred Bockemuehl Dipl Ing Lamellenkranz fuer Aussen- oder Innenkollektoren von elektrischen Maschinen und Geraeten
NL73161C (de) * 1945-07-13 1900-01-01
GB644285A (en) * 1945-10-12 1950-10-11 Watliff Company Ltd Improvements in or relating to commutators
DE961910C (de) * 1954-12-31 1957-04-11 Bosch Gmbh Robert Verfahren zum Herstellen eines Stromwenders aus einem ringfoermigen Werkstueck

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE196277C (de) *
US1901955A (en) * 1931-02-21 1933-03-21 Lionel Corp Method of making commutators
US2818518A (en) * 1954-03-17 1957-12-31 Gen Electric Electric motor and method of manufacture therefor
US2823286A (en) * 1954-07-12 1958-02-11 John T Beck Contacts for electrical circuits and methods for making same

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3525008A (en) * 1965-12-06 1970-08-18 Robert P Burr Electrical wire wound axial air-gap machines
US3449827A (en) * 1966-10-10 1969-06-17 Gen Motors Corp Method of making commutator assembly
US3502915A (en) * 1966-11-02 1970-03-24 Etablis Aesup Electric dry shaver with sloping lap joint connecting front and rear casing sections
US3486056A (en) * 1967-03-09 1969-12-23 Eastman Kodak Co Commutator
US3473062A (en) * 1968-04-05 1969-10-14 Eletrogeraete Vvb Carbon commutator
US3473063A (en) * 1968-04-05 1969-10-14 Eletrogeraete Vvb Carbon commutators
US3805103A (en) * 1970-09-18 1974-04-16 Philips Corp Commutator for a small electrodynamic machine
FR2548471A1 (fr) * 1983-06-28 1985-01-04 Paris & Du Rhone Collecteur frontal perfectionne
FR2549305A1 (fr) * 1983-07-13 1985-01-18 Barbe Jean Procede et installations pour la fabrication de collecteurs, destines aux machines tournantes electriques

Also Published As

Publication number Publication date
CH363082A (de) 1962-07-15
DE1158164B (de) 1963-11-28

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