US2092627A - Carbon brush - Google Patents

Carbon brush Download PDF

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Publication number
US2092627A
US2092627A US18599A US1859935A US2092627A US 2092627 A US2092627 A US 2092627A US 18599 A US18599 A US 18599A US 1859935 A US1859935 A US 1859935A US 2092627 A US2092627 A US 2092627A
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United States
Prior art keywords
copper
carbon
sulphide
block
layer
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
US18599A
Inventor
Roy L Adams
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.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Priority to US18599A priority Critical patent/US2092627A/en
Application granted granted Critical
Publication of US2092627A publication Critical patent/US2092627A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R39/00Rotary current collectors, distributors or interrupters
    • H01R39/02Details for dynamo electric machines
    • H01R39/36Connections of cable or wire to brush
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R39/00Rotary current collectors, distributors or interrupters
    • H01R39/02Details for dynamo electric machines
    • H01R39/18Contacts for co-operation with commutator or slip-ring, e.g. contact brush
    • H01R39/20Contacts for co-operation with commutator or slip-ring, e.g. contact brush characterised by the material thereof

Definitions

  • the present invention relates to a method for ioining copper to carbon and more particularly to carbon brushes for dynamo electric machines and a method for making the same.
  • One of the objects of the present invention is to provide a low resistance connection between a carbon brush and the flexible conductor usually employed to carry current to or from the brush.
  • a flexlble connector l may be secured to the welded copper mass 2 in a manner well known in the art.
  • pulverled copper instead of applying pulverled copper to the carbon block as hereinbefore indicated, it usually will be found preferable to apply a cupreous material such as pulverized copper sulphide directly to the carbon block and to heat the copper sulphide and carbon block to a temperature of .about 600 to 800' C. while pressure is simultaneously applied to the copper sulphide. An excess of copper sulphide is employed so that theadjacent pores of the carbon block will be fllled or imprenated and a layer of copper sulphide oorrespondinz to layer 8 of Fig. 1 provided on top of the carbon.
  • a cupreous material such as pulverized copper sulphide directly to the carbon block and to heat the copper sulphide and carbon block to a temperature of .about 600 to 800' C. while pressure is simultaneously applied to the copper sulphide.
  • An excess of copper sulphide is employed so that theadjacent pores of the carbon block will be fllled or imprenated and
  • a copper plate corresponding to the welded copper mass 2 may then be secured to the layer of copper sulphide in any desired manner, for example by brazing, after which a flexible conductor 4 may be secured to 5 the copper plate.
  • the intermediate layer of copper sulphide is secured to the carbon with such great tenacity that if :an attempt is' made to separate'the copper sulphide from the carbon the break will occur in the carbon rather than at the junction of the copper sulphide layer and the carbon.
  • copper sulphide may provide an opening in the upper surface of a carbon brush 5 and fill it with pulverized copper or copper sulphide 6 into which a flexible conductor 'l may be inserted after which pressure and heat may be applied to the pulverized material as hereinbefore set forth.
  • a carbon block provided with a layer of cop-- per sulphide thereon, the pores of said block adjacent said layer being impregnated with said sulphide.

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  • Motor Or Generator Current Collectors (AREA)

Description

R. L. ADAMS CARBON Bnusfl' Sept. 7, 1937.
Filed April 27, 1935 w. ;s rm Wmodour mi t f w Patented Sept. 7, 1937 CARBON BBUSH Roy' L. Adams. Schenectady, N. Y., asaiznor to General Electric Company, a corporation of New York v Application Api-ii 27, 1935, serial No. 18,599 i 3Claima.
The present invention relates to a method for ioining copper to carbon and more particularly to carbon brushes for dynamo electric machines and a method for making the same.
One of the objects of the present invention is to provide a low resistance connection between a carbon brush and the flexible conductor usually employed to carry current to or from the brush.
The novel features which are characteristic of my invention are set forth with particularity in the appended claims. The inventlon itself however will best be understood from reference to the following specification when considered in-connection with the accompanying drawing in which Flg. 1 is a view in elevation of a carbon brush embodying the features of my invention, while Fix. 2 is a cross sectional view of a modified form of my invention.
In carrying out my invention I apply a layer of flnely divided copper to a carbon block l. The block and copper are then heated at an elci'ated temperature, for example about 600 C.-to 800 C., but below the melting point of the copper, while pressure is simultaneously ,applied to the copper to force it into the adjacent pores of the carbon and to weld the copper particles into a solid mass 2. During the heating process, any sulphur in the carbon block I ris to the upper surface thereof and forms a compound with a portion of the copper providing thereby an intermediate layer I of copper sulphide. A flexlble connector l may be secured to the welded copper mass 2 in a manner well known in the art.
Instead of applying pulverled copper to the carbon block as hereinbefore indicated, it usually will be found preferable to apply a cupreous material such as pulverized copper sulphide directly to the carbon block and to heat the copper sulphide and carbon block to a temperature of .about 600 to 800' C. while pressure is simultaneously applied to the copper sulphide. An excess of copper sulphide is employed so that theadjacent pores of the carbon block will be fllled or imprenated and a layer of copper sulphide oorrespondinz to layer 8 of Fig. 1 provided on top of the carbon. A copper plate corresponding to the welded copper mass 2 may then be secured to the layer of copper sulphide in any desired manner, for example by brazing, after which a flexible conductor 4 may be secured to 5 the copper plate. The intermediate layer of copper sulphide is secured to the carbon with such great tenacity that if :an attempt is' made to separate'the copper sulphide from the carbon the break will occur in the carbon rather than at the junction of the copper sulphide layer and the carbon.
Instead of applying flnely divided copper or I copper sulphide to the entire upper surface of the carbon block I may provide an opening in the upper surface of a carbon brush 5 and fill it with pulverized copper or copper sulphide 6 into which a flexible conductor 'l may be inserted after which pressure and heat may be applied to the pulverized material as hereinbefore set forth.
While my invention is partlcularly adapted for use in connection with commutator brushes it will be obvious that it is not limited to such use and that it may be employed in connection with carbon contacts and the like or in any device where a particularly strong connection between copper and carbon is desired.
What I claim as new and desire to secure by Letters Patent of the United States, is:
1. A carbon block provided with a layer of cop-- per sulphide thereon, the pores of said block adjacent said layer being impregnated with said sulphide.
which comprises applying pulverizedl copper sulphide to a carbon block, heating the block and copper sulphide at an elevated temperature, while pressure is simultaneously applied to the copper sulphide.
' BOY L. ADAMS.
US18599A 1935-04-27 1935-04-27 Carbon brush Expired - Lifetime US2092627A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US18599A US2092627A (en) 1935-04-27 1935-04-27 Carbon brush

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US18599A US2092627A (en) 1935-04-27 1935-04-27 Carbon brush

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US2092627A true US2092627A (en) 1937-09-07

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2654038A (en) * 1950-11-25 1953-09-29 Speer Carbon Company Molded-in shunt electrical contact member
US3601645A (en) * 1968-05-23 1971-08-24 Morganite Carbon Ltd Electrical contact brushes
US5263562A (en) * 1988-06-23 1993-11-23 Hoffman & Co. Elektrokohle Gesellschaft M.B.H Carbon brush for collector
US20050274006A1 (en) * 2004-06-14 2005-12-15 Arwed Uecker Process for the production of a carbon brush, and brush produced thereby

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2654038A (en) * 1950-11-25 1953-09-29 Speer Carbon Company Molded-in shunt electrical contact member
US3601645A (en) * 1968-05-23 1971-08-24 Morganite Carbon Ltd Electrical contact brushes
US5263562A (en) * 1988-06-23 1993-11-23 Hoffman & Co. Elektrokohle Gesellschaft M.B.H Carbon brush for collector
US20050274006A1 (en) * 2004-06-14 2005-12-15 Arwed Uecker Process for the production of a carbon brush, and brush produced thereby
US7638918B2 (en) * 2004-06-14 2009-12-29 Carbone Lorraine Applications Electriques Carbon brush having a shunt wire in a carbon brush body

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