US3805103A - Commutator for a small electrodynamic machine - Google Patents

Commutator for a small electrodynamic machine Download PDF

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Publication number
US3805103A
US3805103A US00179774A US17977471A US3805103A US 3805103 A US3805103 A US 3805103A US 00179774 A US00179774 A US 00179774A US 17977471 A US17977471 A US 17977471A US 3805103 A US3805103 A US 3805103A
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US
United States
Prior art keywords
commutator
percent
gold
contact layer
copper
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
US00179774A
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English (en)
Inventor
De Griend J Van
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.)
US Philips Corp
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US Philips Corp
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 US Philips Corp filed Critical US Philips Corp
Application granted granted Critical
Publication of US3805103A publication Critical patent/US3805103A/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
    • H01R39/00—Rotary current collectors, distributors or interrupters
    • H01R39/02—Details for dynamo electric machines
    • H01R39/022—Details for dynamo electric machines characterised by the materials used, e.g. ceramics
    • H01R39/025—Conductive materials
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/922—Static electricity metal bleed-off metallic stock
    • Y10S428/9265—Special properties
    • Y10S428/929—Electrical contact feature
    • 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
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771—Transition metal-base component
    • Y10T428/12861—Group VIII or IB metal-base component
    • Y10T428/12889—Au-base component
    • 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
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12993—Surface feature [e.g., rough, mirror]
    • 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
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31678—Of metal

Definitions

  • ABSTRACT A commutator for a small electric motor wherein the commutator segments are made by stamping same from a metal strip or a metal sheet provided with a contact layer which consists of an alloy of noble metals rolled on to the substrate metal.
  • the alloy comprises 70 i 1 percent of gold, 20 i 1 percent of silver, 10 i 1 percent of copper, and an impurity content in the form of other metals which is at most 0.05 percent.
  • This invention relates to a commutator for a small electrodynamic machine in which the commutator segments are made of sheet material which is composed of a metal substrate and a contact layer which consists of an alloy of noble metals which is rolled on to the substrate.
  • a far better commutation quality is obtainable with commutators as frequently used in particular in Anglo- Saxon countries, which commutators are provided with a layer of a gold alloy by clectrodeposition. In addition, these commutators may reach lifetimes of about 1,500 hours.
  • the invention provides a commutator of the type defined at the beginning of this specification which in respect of useful life and quality of commutation is considerably better and moreover has the advantage of the said commutators, i.e., greater ease in automation of manufacture, the commutator according to the invention being characterized in that the said contact layer consists of a gold alloy.
  • the novel commutator is especially useful in the commutator structure disclosed in my copending U.S. application, Ser. No. 180,027, filed Sept. 13, 1971.
  • a flat commutator 1 is composed of segments 2 mounted on a metal substrate 3 and separated by insulation strips 5.
  • the commutator is mounted for rotation about a shaft 4.
  • Each segment is made of a gold alloy to be described below.
  • the gold alloy comprises i 1 percent of gold, 20 i 1 percent of silver, the remainder being copper and impurities.
  • a preferred embodiment is characterized in that the percentage of impurities in the alloy which takes the form of metals which do not belong to the group gold, silver and copper is at most 0.05 percent.
  • the mean roughness of the surface of the contact layer is at most 2 ru, i.e., two times unity surface roughness ru.
  • the value of this unit is expressed in ,u. or in microinches, wherein 1 LL 40 micro-inches.
  • a commutator for a small dynamo-electric machine comprising, a plurality of commutator segments made of a sheet material wherein each segment comprises a metal substrate and a contact layer on the substrate, and said contact layer comprises a gold alloy of noble metals containing 70 i 1 percent of gold, 20 :L 1 percent of silver, the remainder being composed of copper and impurities.
  • a commutator as claimed in claim 2 characterized in that the percentage of impurities in the alloy include at most 0.05 percent of metals other than gold, silver and copper.
  • a commutator as claimed in claim 3 characterized in that the mean roughness of the surface of the contact layer is at most 2 ru.
  • a commutator for a small dynamo-electric machine comprising, a plurality of flat commutator segments insulated from one another, said segments being formed of a metal substrate covered by a contact layer, and said contact layer comprises an alloy containing 70 i 1 percent gold, 20 i 1 percent silver with the remainder composed of copper and other metal impurities.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Motor Or Generator Current Collectors (AREA)
US00179774A 1970-09-18 1971-09-13 Commutator for a small electrodynamic machine Expired - Lifetime US3805103A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7013888A NL7013888A (enrdf_load_stackoverflow) 1970-09-18 1970-09-18

Publications (1)

Publication Number Publication Date
US3805103A true US3805103A (en) 1974-04-16

Family

ID=19811106

Family Applications (1)

Application Number Title Priority Date Filing Date
US00179774A Expired - Lifetime US3805103A (en) 1970-09-18 1971-09-13 Commutator for a small electrodynamic machine

Country Status (11)

Country Link
US (1) US3805103A (enrdf_load_stackoverflow)
JP (1) JPS476815A (enrdf_load_stackoverflow)
AT (1) AT314031B (enrdf_load_stackoverflow)
AU (1) AU458020B2 (enrdf_load_stackoverflow)
CA (1) CA948686A (enrdf_load_stackoverflow)
CH (1) CH530095A (enrdf_load_stackoverflow)
DE (1) DE2143708B2 (enrdf_load_stackoverflow)
FR (1) FR2108294A5 (enrdf_load_stackoverflow)
GB (1) GB1315080A (enrdf_load_stackoverflow)
IT (1) IT940913B (enrdf_load_stackoverflow)
NL (1) NL7013888A (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4086510A (en) * 1975-06-26 1978-04-25 Olympus Optical Co., Ltd. Flat miniature dynamoelectric machine
US4895075A (en) * 1987-09-29 1990-01-23 Werkzeugmaschinenfabrik Oerlikon-Buhrle Ag Method of, and apparatus for, detonating a projectile in the proximity of a target
WO1996026526A1 (en) * 1995-02-24 1996-08-29 Mabuchi Motor Co., Ltd. Sliding contact material, clad composite material, commutator employing said material and direct current motor employing said commutator
WO2004086571A1 (en) * 2003-03-24 2004-10-07 Dolphin Electric Holdings Inc Commutator
WO2016077805A3 (en) * 2014-11-14 2016-10-06 Physio-Control, Inc. Multifunctional healthcare monitoring apparatus

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4931056A (enrdf_load_stackoverflow) * 1972-07-22 1974-03-20
JPS5610644B2 (enrdf_load_stackoverflow) * 1973-03-07 1981-03-10
JPS49124492A (enrdf_load_stackoverflow) * 1973-04-04 1974-11-28
JPS50132386A (enrdf_load_stackoverflow) * 1974-03-08 1975-10-20
JPS51127303A (en) * 1975-04-25 1976-11-06 Matsushita Electric Works Ltd Slide current collector
JPS52124105A (en) * 1976-04-09 1977-10-18 Ina Sankyo Kk Superslow speed dc motor
JPS5381796U (enrdf_load_stackoverflow) * 1976-12-08 1978-07-06
JPS5486602U (enrdf_load_stackoverflow) * 1977-12-01 1979-06-19
JPS5519441U (enrdf_load_stackoverflow) * 1978-07-20 1980-02-07
US4283841A (en) * 1978-01-26 1981-08-18 Mitsuba Electric Mfg. Co., Ltd. Method of manufacturing a commutator
JPS54101104A (en) * 1978-01-26 1979-08-09 Mitsuba Electric Mfg Co Commutator
JPS557555U (enrdf_load_stackoverflow) * 1978-06-30 1980-01-18
JPS55106472U (enrdf_load_stackoverflow) * 1979-01-19 1980-07-25
JPS577375U (enrdf_load_stackoverflow) * 1980-06-17 1982-01-14
US4618856A (en) * 1985-05-03 1986-10-21 Allied Corporation Stall surge detector
ES2044885T3 (es) * 1987-08-19 1994-01-16 Hubner Elektromaschinen Ag Colector para una maquina electrica.
WO1993026065A1 (en) * 1992-06-10 1993-12-23 Lajos Kardos Commutator for electric motors and apparatus for automatic welding of non noble metal current input legs to segments of the slip ring of a commutator

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3005920A (en) * 1959-01-19 1961-10-24 Fiat Spa Commutator for dynamo electric machines and manufacturing method
US3014144A (en) * 1957-06-08 1961-12-19 Fleischmann Geb Disc commutators for fractional horsepower motors
US3341726A (en) * 1965-03-29 1967-09-12 John F Brinster Rotating bearing contacts for electrical commutators
US3347799A (en) * 1964-07-16 1967-10-17 Du Pont Gold-palladium conductor compositions and conductors made therefrom
US3414970A (en) * 1965-12-27 1968-12-10 Nippon Denso Co Method of producing flat or surface commutator
US3468676A (en) * 1963-09-09 1969-09-23 Photocircuits Corp Electroless gold plating
US3478421A (en) * 1966-07-20 1969-11-18 Lucas Industries Ltd Method of manufacturing commutators
US3617785A (en) * 1970-07-24 1971-11-02 Interelectric Ag Current-collecting device for small commutating machines

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3014144A (en) * 1957-06-08 1961-12-19 Fleischmann Geb Disc commutators for fractional horsepower motors
US3005920A (en) * 1959-01-19 1961-10-24 Fiat Spa Commutator for dynamo electric machines and manufacturing method
US3468676A (en) * 1963-09-09 1969-09-23 Photocircuits Corp Electroless gold plating
US3347799A (en) * 1964-07-16 1967-10-17 Du Pont Gold-palladium conductor compositions and conductors made therefrom
US3341726A (en) * 1965-03-29 1967-09-12 John F Brinster Rotating bearing contacts for electrical commutators
US3414970A (en) * 1965-12-27 1968-12-10 Nippon Denso Co Method of producing flat or surface commutator
US3478421A (en) * 1966-07-20 1969-11-18 Lucas Industries Ltd Method of manufacturing commutators
US3617785A (en) * 1970-07-24 1971-11-02 Interelectric Ag Current-collecting device for small commutating machines

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4086510A (en) * 1975-06-26 1978-04-25 Olympus Optical Co., Ltd. Flat miniature dynamoelectric machine
US4895075A (en) * 1987-09-29 1990-01-23 Werkzeugmaschinenfabrik Oerlikon-Buhrle Ag Method of, and apparatus for, detonating a projectile in the proximity of a target
WO1996026526A1 (en) * 1995-02-24 1996-08-29 Mabuchi Motor Co., Ltd. Sliding contact material, clad composite material, commutator employing said material and direct current motor employing said commutator
CN1048817C (zh) * 1995-02-24 2000-01-26 马渊马达株式会社 滑动接触材料、包层复合材料、使用所述材料的换向器和使用所述换向器的直流电动机
KR100303414B1 (ko) * 1995-02-24 2001-11-22 다나까 세이이찌로 슬라이딩접점재료,피복복합재,이를이용한정류자및상기정류자를이용한직류모터
WO2004086571A1 (en) * 2003-03-24 2004-10-07 Dolphin Electric Holdings Inc Commutator
WO2016077805A3 (en) * 2014-11-14 2016-10-06 Physio-Control, Inc. Multifunctional healthcare monitoring apparatus
US20170319085A1 (en) * 2014-11-14 2017-11-09 Physio-Control, Inc. Multifunctional healthcare monitoring apparatus

Also Published As

Publication number Publication date
GB1315080A (en) 1973-04-26
CA948686A (en) 1974-06-04
DE2143708A1 (de) 1972-03-23
JPS476815A (enrdf_load_stackoverflow) 1972-04-14
FR2108294A5 (enrdf_load_stackoverflow) 1972-05-19
DE2143708B2 (de) 1980-01-03
CH530095A (de) 1972-10-31
AU458020B2 (en) 1975-02-13
AU3355471A (en) 1973-03-22
NL7013888A (enrdf_load_stackoverflow) 1972-03-21
IT940913B (it) 1973-02-20
AT314031B (de) 1974-03-11

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