US2604502A - Commutator - Google Patents

Commutator Download PDF

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Publication number
US2604502A
US2604502A US154216A US15421650A US2604502A US 2604502 A US2604502 A US 2604502A US 154216 A US154216 A US 154216A US 15421650 A US15421650 A US 15421650A US 2604502 A US2604502 A US 2604502A
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US
United States
Prior art keywords
bars
members
ring
conductive
commutator
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
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US154216A
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English (en)
Inventor
Felici Noel
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.)
Machines Electrostatiques SA
Original Assignee
Mach Electrostatiques Sa Des
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 Mach Electrostatiques Sa Des filed Critical Mach Electrostatiques Sa Des
Application granted granted Critical
Publication of US2604502A publication Critical patent/US2604502A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • 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
    • Y10T29/49009—Dynamoelectric machine
    • Y10T29/49011—Commutator or slip ring assembly

Definitions

  • the present:invention relates f to commutators or similar devices for' el'ectrical machin'esi
  • the invention especially relates-rte a corrixnut'at'ing" device of thev type whichprovides for period-i cally or intermittently electrically" connecting, by means of brushes cooperating with" the commutation.
  • a fixed electrical conductive" part of the machine to a con'diietive part movi during cp'eratio'n of the machine;
  • the de'v ftheinvention isparticularly'adapted for eii I conn'mitationzbr chzatnge of the" connecti -wo such moving'conductive parts' an'd (ed: part.
  • dielectric strength of a given: dielectric medium that is the potential differenceper unit" of the. space "between" the electrodes J-aei'o's'swhich the potential dif Schl'e being equal, is .1 mu'ch higher it" the dielectric medium" is 'maintained between two e-iectrodes-* or similar conductive parts which define there betweena: narrow. space than.
  • Fig. 4" is a perspective view/"of anotherem bodiment oftheinvention
  • Fig. 5 shows aviewin elevationof a third-em bodiment of the invention
  • Fig. 6 is a'sectional view taken on line B-6 of Fig. 5.
  • the commutator comprises metal bars I which are carried on the outer circumferential surface of a ring 2 of plastic material and are maintained in place by two flanges 3 formed at the ends of the ring integrally therewith. As shown in Fig. 3 the material of the flanges extends over upon the ends of the bars to hold these bars against movement endwise thereof as well as in spaced relation circumferentially with respect to each other.
  • the bars i thus mounted circumferentially about the ring 2 are separated from each other by air gaps 4.
  • Every third bar in the embodiments of Figs. 1, 2 and 3 has connected thereto a conductor 6 which may extend through the portions of the flanges which overlie the bars I or may extend through slits formed in the flange which are in alignment with the air gaps between the bars I.
  • a conductor 6 which may extend through the portions of the flanges which overlie the bars I or may extend through slits formed in the flange which are in alignment with the air gaps between the bars I.
  • the two auxiliary bars are not provided with conductors and are always insulated from each other and from the primary bars.
  • Th commutator as shown in Figs. 1 to 3 inclusive may be manufactured in a very simple manner by mounting a metallic sleeve upon the ring 2 during the manufacturing operation. This may be accomplished, for example, by a molding operation in which the plastic or other insulating material of the ring 2 is molded internally of the metallic sleeve and the flanges 3 also are formed extending over the edges of the metallic sleeve to hold this sleeve in place.
  • This assembled ring and sleevethen may be machined to cut slots longitudinally parallel to the axis of the ring and in spaced relation circumferentially about the axis.
  • the depth of the cuts forming these slots is such that in the central part of the ring between the flanges thereof the metal of the sleeve is cut through to separate the sleeve into a plurality of bars insulated from each other by the material of the ring and with air gaps between the adjacent edges of consecutive bars. It will be apparent that although the material of the flange also is cut through in such a machining operation, nevertheless the remaining portions of the flanges 3 extend over the ends of the bars thus produced to hold these bars in place as above stated.
  • the commutator shown in Fig. 4 comprises conducting members I carried on one of the faces transverse to the axis of a ring 8 of insulating material. These members I are regularly spaced with respect to each other about the axis of the ring. As will be seen in Fig. 4 the members i are of dovetail form, that is with beveled end edges, and are set into the material of the ring 8 with the longer face of the member 1 inset so that the material of the ring 8 overlies the bevels 9 to insure secure fastening of the members 1 in the ring.
  • the overlying portions of the ring 8 in this embodiment are disposed adjacent the outer and inner circumferences of the ring 8. The radial extent of these portions may be sufficient to provide mechanical holds for the bars 1 against movement radially as well as circumferentially about the axis of the ring 8.
  • Every third member 1 in this embodiment also has connected thereto a conductor 6 adapted to be electrically connected to an electrical part of the machine, such as a movable conducting conveyor in the case of an electrostatic machine or to an armature coil in the case of an electromagnetic machine, while the other two members l are insulated from the connected member and from each other by the material of the ring 8.
  • the conductors 6 may extend from the inset face of the bar I generally parallel to the axis of the ring 8 through the material of this ring to the opposite face of the ring from that at which the bars are inset.
  • conveyor or armature coil the conductors 6 may be bent at an angle as shown in Fig. 4 or may be otherwise suitably carried to the electrical part.
  • the commutator shown in Fig. 4 may be manufactured, for example, by a molding operation, by inserting a metallic annular member in a lateral face or the ring 8 transversely of the axis thereof in such a way that the surface of the annular member is flush with this transverse face of the ring and is exposed at this face.
  • the metallic annular member is formed with oppositely beveled edges at the outer and inner edges of the annulus, the material of the ring 8 may be molded about and extend over upon these beveled edges to hold the annular member in the ring 8.
  • the assembled ring and annular member then may be machined by cutting radial slots III in spaced relation about the axis of the ring and to such a depth from the transverse face of the annular member that the thickness of the annular member is cut through, thus to separate the annular ring into a plurality of the members 1 in spaced relation about the axis of the ring.
  • These conducting members or bars I become insulated from each other by the material of the ring as well as by the air gaps therebetween while being held in place in the ring 8 by virtue of the material of the ring overlying the beveled edges of the respective members or bars I.
  • the commutator shown in Figs. 5 and 6 comprises a solid circular insulating disc H except for an aperture I! which may serve for mounting the disc on a rotatable shaft.
  • metallic bars I3 of generally trapezoidal form are mounted in spaced relation to each other.
  • the bars l3 may be mounted on the face of the disc ll so as to provide air spaces between adjacent bars or these bars may be embedded in the insulating material of the disc with their faces flush with the face of the disc as shown in Fig. 6. In either case each bar is continuously insulated from the others.
  • Every third bar in this embodiment also has electrically connected thereto a conductor 6 adapted for connection to an electrical part of the machine while the two other bars are without such conductive connections.
  • the conductor 6 may extend from the back side of the bars l3 through the material of the insulating disc II and may be bent radially outwardly as shown in Figs.i5 and 6 or otherwise adapted for connection to the electrical parts of the machine.
  • a commutator according to the invention may provide two primary bars adapted for electrical connection to an electrical part or parts of the machine, these primary bars being separated by a single auxiliary rac sts bat em a ed l e efmm n w utuchsew nection. If desired, howeven more thantwo Such aux i y ars ma pr ed e ween he primary bars which are connected tothe electrical part or; parts in order, to suit a, different condition, t
  • acommutator orthe like-for an electrical a machine which comprises a plurality of conductive members supported in insulated relation to each other and in spaced relation to each other in succession in the direction of said spacing, selected members being adapted to be respectively electrically connected to electrically conductive parts of the machine between which a substantial difference of potential may be maintained or developed, said selected members being spaced from each other by at least one other of said members therebetween in said succession maintained in said insulated relation, the summation of the several spaces between said members in said succession from one selected member to the next being less than the space directly between said selected members required for a given potential difierence to prevent breakdown of the dielectric material providing said insulated relation.
  • a commutator or the like for an electrical machine which comprises a supporting member of insulating material, conductive members supported by said supporting member in individually insulated relation to each other and in circumferentially spaced relation to each other in succession about an axis, conductive elements supported by said supporting member and respectively electrically connected to selected conductive members for connecting said selected members to electrically conductive parts of the machine between which substantial differences of potential may be maintained or developed when said commutator is associated with said machine, said selected conductive members being spaced from each other by at least one other of said conductive members therebetween in said, succession maintained; in said individually insulated relation to said: selected conductive members and to said electrically conductive parts, the summation of the several spaces between said members in; said succession from one selected member to thenext being less than the space directly between said selected members required for a, given potential difference to prevent, breakdown, cf, the dielectric, material providing said insulated relation, V
  • a commutatoror the like, for an electrical machine which comprises a supporting; member of insulati-ngmaterialin the form of a cylinder having outwardly extending flanges adjacent the endsv thereof, conductive; members, supporte v ids pporting ember upon the ob"- cumference of said cylinder in circumferentially spaced indilliduallyqinsulated relation to each other: in succession about, the axis ofv the yl nd r an arran ed with an. ext nt; thereof parallel to; the axis of: the.
  • a commutator or the like for an electrical machine as defined in claim 3 in which said supporting member is formed of a molded material, said ends of said conductive members re spectively being embedded in said flanges.
  • a commutator or the like for an electrical machine as defined in claim 3 in which said flanges are formed with slots extending parallel to said axis and respectively in alignment with the spaces between adjacent conductive members.
  • a commutator or the like for an electrical machine as defined in claim 2 in which a said supporting member of insulating material provides a face transverse to said axis, said conductive members being supported by said supporting member adjacent said face in insulated relation to each other and in circumferentially spaced relation to each other in succession about said axis, said conductive members having an extent thereof generally radially with respect to said axis exposed upon said face, said supporting member providing portions thereof which extend over upon the radially spaced ends or said conductive members to hold said conductive members in position upon said supporting memher, said portions being separated by slots which respectively are in alignment with the radially extending spaces between said conductive members.
  • a commutator or the like for an electrical machine which comprises a supporting member of insulating material having a face transverse to an axis of rotation extending therethrough, conductive members supported by said supporting member adjacent said face in individually insulated relation to each other and in circumferentially spaced relation to each other in succession about said axis, said conductive members having an extent thereof generally radially with respect to said axis exposed upon said face, said supporting member providing portions thereof which extend over upon the radially spaced ends of said conductive members to hold said conductive members in position adjacent said face of said supporting member, and conductive elements supported by said supporting member and respectively electrically connected to said selected conductive members for connecting said selected members to electrically conductive parts of the machine between which substantial differences of potential may be maintained or developed when said commutator is associated with said machine, said selected conductive members being spaced from each other by at least one other of said conductive members therebetween in said succession maintained in said individually insulated relation to said selected conductive members and to said electrically conductive parts, the summation of the several
  • a commutator or the like for an electrical machine as defined in claim 2 in which said conductive members extend generally parallel 8 to each otherin a predetermined relation to said axis, said supporting member providing portions thereof extending over said conductive members outwardly thereof at respective opposite ends thereof to hold said members in place upon said supporting member and to leave a face of said conductive members exposed upon said supporting member, said portions of said supporting member; being separated by slots extending respectively in alignment with the spaces between adjacent conductive members in said succession.
  • a commutator or the like as defined in claim 8 in which said slots are continuous in the portions of the supporting member generally underlying said conductive members to provide a depth of said'slots transversely of the exposed faces of said conductive members greater than the depth of said conductive members transversely of said faces.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Motor Or Generator Current Collectors (AREA)
  • Insulating Bodies (AREA)
US154216A 1949-04-15 1950-04-06 Commutator Expired - Lifetime US2604502A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR832634X 1949-04-15

Publications (1)

Publication Number Publication Date
US2604502A true US2604502A (en) 1952-07-22

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Family Applications (1)

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US154216A Expired - Lifetime US2604502A (en) 1949-04-15 1950-04-06 Commutator

Country Status (5)

Country Link
US (1) US2604502A (fr)
CH (1) CH286987A (fr)
DE (1) DE832634C (fr)
FR (1) FR1011902A (fr)
GB (1) GB693914A (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2852628A (en) * 1957-05-29 1958-09-16 Tele Dynamics Inc Commutator device
US3139475A (en) * 1961-10-06 1964-06-30 Alvin S Hopping Frequency stabilized glow-discharge tube oscillator and electrical musical instrument employing the same
US3395449A (en) * 1963-04-04 1968-08-06 Globe Tool Eng Co Progressively winding armature coils and deforming coil lead portions in commutator br slots
US3466483A (en) * 1967-12-04 1969-09-09 Gauss Electrophysics Inc Sintered rotor for an electric motor

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2848773A (en) * 1953-05-14 1958-08-26 Allied Chem Method of precision casting
BE682136A (fr) * 1965-07-12 1966-11-14
DE1284512B (de) * 1966-09-01 1968-12-05 Bosch Gmbh Robert Verfahren zur Herstellung eines Plankommutators fuer elektrische Maschinen
FR2482375A1 (fr) * 1980-05-09 1981-11-13 Lorette Manufacture Vilebrequi Procede et moyens de fabrication de collecteurs frontaux de moteurs electriques
EP0297558B1 (fr) * 1987-06-30 1994-06-01 Toyoda Gosei Co., Ltd. Volant de direction, bagues de frottement segmentées et méthode pour disposer ces bagues

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US882682A (en) * 1903-01-21 1908-03-24 Alexander Heyland Commutator for polyphase currents.
US1241559A (en) * 1913-12-31 1917-10-02 Westinghouse Electric & Mfg Co Commutator.
US1407776A (en) * 1919-12-01 1922-02-28 Gilbert Co A C Manufacture of commutator for electric motors
US1757393A (en) * 1926-07-22 1930-05-06 Bosch Robert Commutator
US1839859A (en) * 1929-09-21 1932-01-05 Apple Commutator
GB499918A (en) * 1937-01-19 1939-01-31 Siemens Ag Improvements in or relating to rotary converters
US2236257A (en) * 1938-03-23 1941-03-25 Gen Ind Co Commutator
US2316651A (en) * 1942-03-23 1943-04-13 Knapp Monarch Co Commutator structure
US2316652A (en) * 1942-03-23 1943-04-13 Knapp Monarch Co Commutator structure and method of forming the segments thereof
US2400590A (en) * 1944-05-18 1946-05-21 E A Lab Inc Method of making commutators
US2451500A (en) * 1945-04-26 1948-10-19 Fairchild Engineering Company Method of making commutators

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US882682A (en) * 1903-01-21 1908-03-24 Alexander Heyland Commutator for polyphase currents.
US1241559A (en) * 1913-12-31 1917-10-02 Westinghouse Electric & Mfg Co Commutator.
US1407776A (en) * 1919-12-01 1922-02-28 Gilbert Co A C Manufacture of commutator for electric motors
US1757393A (en) * 1926-07-22 1930-05-06 Bosch Robert Commutator
US1839859A (en) * 1929-09-21 1932-01-05 Apple Commutator
GB499918A (en) * 1937-01-19 1939-01-31 Siemens Ag Improvements in or relating to rotary converters
US2236257A (en) * 1938-03-23 1941-03-25 Gen Ind Co Commutator
US2316651A (en) * 1942-03-23 1943-04-13 Knapp Monarch Co Commutator structure
US2316652A (en) * 1942-03-23 1943-04-13 Knapp Monarch Co Commutator structure and method of forming the segments thereof
US2400590A (en) * 1944-05-18 1946-05-21 E A Lab Inc Method of making commutators
US2451500A (en) * 1945-04-26 1948-10-19 Fairchild Engineering Company Method of making commutators

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2852628A (en) * 1957-05-29 1958-09-16 Tele Dynamics Inc Commutator device
US3139475A (en) * 1961-10-06 1964-06-30 Alvin S Hopping Frequency stabilized glow-discharge tube oscillator and electrical musical instrument employing the same
US3395449A (en) * 1963-04-04 1968-08-06 Globe Tool Eng Co Progressively winding armature coils and deforming coil lead portions in commutator br slots
US3466483A (en) * 1967-12-04 1969-09-09 Gauss Electrophysics Inc Sintered rotor for an electric motor

Also Published As

Publication number Publication date
CH286987A (fr) 1952-11-15
DE832634C (de) 1952-02-28
FR1011902A (fr) 1952-07-01
GB693914A (en) 1953-07-08

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