GB1396943A - Production of graphite powder for making brushes for electrical machines - Google Patents

Production of graphite powder for making brushes for electrical machines

Info

Publication number
GB1396943A
GB1396943A GB3294972A GB3294972A GB1396943A GB 1396943 A GB1396943 A GB 1396943A GB 3294972 A GB3294972 A GB 3294972A GB 3294972 A GB3294972 A GB 3294972A GB 1396943 A GB1396943 A GB 1396943A
Authority
GB
United Kingdom
Prior art keywords
graphite
graphite powder
production
electrical machines
powder
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
Application number
GB3294972A
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of GB1396943A publication Critical patent/GB1396943A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
    • C22C32/0084—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ carbon or graphite as the main non-metallic constituent
    • 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
    • H01R43/12—Manufacture of brushes
    • 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
    • Y10T29/49117—Conductor or circuit manufacturing
    • Y10T29/49119—Brush

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Motor Or Generator Current Collectors (AREA)
  • Manufacturing Of Electrical Connectors (AREA)
  • Conductive Materials (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)

Abstract

1396943 Compressed graphite powder ROBERT BOSCH GmbH 14 July 1972 [16 July 1971] 32949/72 Heading C1A A compressed graphite powder with a substantially spherical grain is formed by compressing flake graphite into a tablet or pellet form to a gross density of at least 1À5 gm./cm.<SP>3</SP> and the graphite pellets or tablets are ground and sieved to a granular size distribution of between 50 and 400 Ám. The graphite used may have a carbon content #96% by weight and a size distribution of 5-80 Ám. The pressure during compression may be between 1 and 5 t./cm.<SP>2</SP>. A bell crusher may be used for grinding the graphite. The graphite obtained may be mixed with a metal, e.g. copper powder and the mixture utilized to form metal/carbon brushes.
GB3294972A 1971-07-16 1972-07-14 Production of graphite powder for making brushes for electrical machines Expired GB1396943A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2135537A DE2135537C3 (en) 1971-07-16 1971-07-16 Process for the production of graphite for metal carbon brushes

Publications (1)

Publication Number Publication Date
GB1396943A true GB1396943A (en) 1975-06-11

Family

ID=5813854

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3294972A Expired GB1396943A (en) 1971-07-16 1972-07-14 Production of graphite powder for making brushes for electrical machines

Country Status (5)

Country Link
US (1) US3765881A (en)
JP (1) JPS5528194B1 (en)
DE (1) DE2135537C3 (en)
FR (1) FR2146747A5 (en)
GB (1) GB1396943A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT997791B (en) * 1972-11-10 1975-12-30 Matsushita Electric Ind Co Ltd METHOD FOR MANUFACTURING A SELECTIVE MEMBRANE FOR IONS
USRE31028E (en) * 1977-05-13 1982-09-14 Cromwell Metals, Inc. Method for processing dross
US4126673A (en) * 1977-05-13 1978-11-21 Cromwell Metals, Inc. Method for processing dross
US4293450A (en) * 1978-04-18 1981-10-06 Vogel F Lincoln Process for conducting electricity utilizing a specifically defined graphite intercalation compound
US4220884A (en) * 1978-05-01 1980-09-02 Trw Inc. Carbon brush for motors and method of making the same
JP5744540B2 (en) * 2011-01-26 2015-07-08 新光電気工業株式会社 Metal composite material, metal composite material manufacturing method, heat dissipation component, and heat dissipation component manufacturing method

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2974039A (en) * 1951-02-05 1961-03-07 Deventor Max Molding of metal powders
CA580791A (en) * 1955-03-08 1959-08-04 Ramadanoff Dimiter Additive for copper-graphite brush
US3666688A (en) * 1968-11-27 1972-05-30 Airco Inc Tamping material

Also Published As

Publication number Publication date
US3765881A (en) 1973-10-16
DE2135537C3 (en) 1978-07-06
JPS4820005A (en) 1973-03-13
FR2146747A5 (en) 1973-03-02
DE2135537A1 (en) 1973-02-01
DE2135537B2 (en) 1977-11-24
JPS5528194B1 (en) 1980-07-25

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee