US2819989A - Dynamoelectric brush - Google Patents

Dynamoelectric brush Download PDF

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Publication number
US2819989A
US2819989A US593833A US59383356A US2819989A US 2819989 A US2819989 A US 2819989A US 593833 A US593833 A US 593833A US 59383356 A US59383356 A US 59383356A US 2819989 A US2819989 A US 2819989A
Authority
US
United States
Prior art keywords
brush
dynamoelectric
brushes
carbon
glycol borate
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
US593833A
Inventor
Edwin F Kiefer
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.)
Stackpole Carbon Co
Original Assignee
Stackpole Carbon 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 Stackpole Carbon Co filed Critical Stackpole Carbon Co
Priority to US593833A priority Critical patent/US2819989A/en
Application granted granted Critical
Publication of US2819989A publication Critical patent/US2819989A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H01B1/04—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of carbon-silicon compounds, carbon or silicon
    • 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
    • H01R39/18—Contacts for co-operation with commutator or slip-ring, e.g. contact brush
    • H01R39/20—Contacts for co-operation with commutator or slip-ring, e.g. contact brush characterised by the material thereof
    • H01R39/22—Contacts for co-operation with commutator or slip-ring, e.g. contact brush characterised by the material thereof incorporating lubricating or polishing ingredient
    • 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
    • Y10T428/30—Self-sustaining carbon mass or layer with impregnant or other layer

Definitions

  • This invention relates to dynamoelectric brushes, such as used with electric motors and generators, and more particularly to impregnated carbon brushes.
  • a carbon brush made in any well-known way is impregnated with polyethylene glycol borate or ethylene glycol borate.
  • the impregnation is accomplished by first mixing the material with water and then impregnating the carbon brush with the solution in any suitable impregnation process.
  • the material thus added to the brush improves its operation and life by reducing friction, combating heavy build-up of film and reducing sparking.
  • the impregnant is stable and does not volatilize at the operating temperatures to which it is subjected. Therefore, the beneficial effect of the additive is maintained throughout the life of the brush.
  • a dynamoelectric brush comprising a carbon body impregnated with a material selected from the group consisting of polyethylene glycol borate and ethylene glycol borate.
  • a brush according to claim 1 in which said material forms from about .2% to about 2% by weight of the brush.

Landscapes

  • Motor Or Generator Current Collectors (AREA)

Description

DYNAMOELECTRIC BRUSH Edwin F. Kiefer, St. Marys, Pa., assignor to Stackpole Carbon Company, St. Marys, Pa., a corporation of Pennsylvania No Drawing. Application June 26, 1956 Serial No. 593,833
2 Claims. (Cl. 117-228) This invention relates to dynamoelectric brushes, such as used with electric motors and generators, and more particularly to impregnated carbon brushes.
A continuing search is being made for brushes that will operate better and longer. One solution has been to impregnate carbon brushes with various materials which improve the brushes to some extent under certain conditions. Among the impregnants that have been used is polyethylene glycol, which improves brushes to some extent but volatilizes too readily at operating temperatures, so that the improved performance does not last very long.
It is among the objects of this invention to provide an electrical brush which has a considerably longer life than an untreated brush and which has improved operating characteristics throughout the life of the brush.
According to this invention, a carbon brush made in any well-known way is impregnated with polyethylene glycol borate or ethylene glycol borate. The impregnation is accomplished by first mixing the material with water and then impregnating the carbon brush with the solution in any suitable impregnation process. The
United States Patent Patented Jan. 14, 1958 brushes are then dried, leaving them impregnated with the desired additive. For best results, the polyethylene or ethylene glycol borate should constitute from about .2% to 2% by weight of the brush.
The material thus added to the brush improves its operation and life by reducing friction, combating heavy build-up of film and reducing sparking. Unexpectedly, the impregnant is stable and does not volatilize at the operating temperatures to which it is subjected. Therefore, the beneficial effect of the additive is maintained throughout the life of the brush.
According to the provisions of the patent statutes, I have explained the principle of my invention and have described what I now consider to represent its best embodiment. However, I desire to have it understood that, within the scope of the appended claims, the invention may be practiced otherwise than as specifically described.
I claim:
1. A dynamoelectric brush comprising a carbon body impregnated with a material selected from the group consisting of polyethylene glycol borate and ethylene glycol borate.
2. A brush according to claim 1, in which said material forms from about .2% to about 2% by weight of the brush.
References Cited in the file of this patent UNITED STATES PATENTS 577,499 Douglas et al. Feb. 23, 1897 2,404,662 Savage July 23, 1946 2,412,701 Williford Dec. 17, 1946 2,715,080 Cashell Aug. 9, 1955 FOREIGN PATENTS 721,211 Great Britain Ian. 5, 1955

Claims (1)

1. A DYNAMOELECTRIC BRUSH COMPRISING A CARBON BODY IMPREGNATED WITH A MATERIAL SELECTED FROM THE GROUP CONSISTING OF POLYETHYLENE GLYCOL BORATE AND ETHYLENE GLYCOL BORATE.
US593833A 1956-06-26 1956-06-26 Dynamoelectric brush Expired - Lifetime US2819989A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US593833A US2819989A (en) 1956-06-26 1956-06-26 Dynamoelectric brush

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US593833A US2819989A (en) 1956-06-26 1956-06-26 Dynamoelectric brush

Publications (1)

Publication Number Publication Date
US2819989A true US2819989A (en) 1958-01-14

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
US593833A Expired - Lifetime US2819989A (en) 1956-06-26 1956-06-26 Dynamoelectric brush

Country Status (1)

Country Link
US (1) US2819989A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2959698A (en) * 1957-12-31 1960-11-08 Gen Electric Laminated carbon brush
WO2005025035A1 (en) 2003-09-04 2005-03-17 Totan Kako Co., Ltd. Carbon brush for electrical machine
JP2005102491A (en) * 2003-09-04 2005-04-14 Totan Kako Kk Carbon brush for electric machine
US20050236925A1 (en) * 2004-04-27 2005-10-27 Aisin Seiki Kabushiki Kaisha Metal-graphite brush and motor including a metal-graphite brush
US20080278026A1 (en) * 2004-04-02 2008-11-13 Aisin Seiki Kabushiki Kaisha Graphite Brush, and a Motor With Graphite Brush

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US577499A (en) * 1897-02-23 Las- willan
US2404662A (en) * 1941-06-21 1946-07-23 Gen Electric Electrical contact element
US2412701A (en) * 1941-02-27 1946-12-17 Nat Carbon Co Inc Brush for electrical machinery
GB721211A (en) * 1951-07-02 1955-01-05 Nat Res Dev Improvements in or relating to the impregnation of porous solids with other materials
US2715080A (en) * 1954-05-27 1955-08-09 Gen Electric Electrical contact brush

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US577499A (en) * 1897-02-23 Las- willan
US2412701A (en) * 1941-02-27 1946-12-17 Nat Carbon Co Inc Brush for electrical machinery
US2404662A (en) * 1941-06-21 1946-07-23 Gen Electric Electrical contact element
GB721211A (en) * 1951-07-02 1955-01-05 Nat Res Dev Improvements in or relating to the impregnation of porous solids with other materials
US2715080A (en) * 1954-05-27 1955-08-09 Gen Electric Electrical contact brush

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2959698A (en) * 1957-12-31 1960-11-08 Gen Electric Laminated carbon brush
WO2005025035A1 (en) 2003-09-04 2005-03-17 Totan Kako Co., Ltd. Carbon brush for electrical machine
JP2005102491A (en) * 2003-09-04 2005-04-14 Totan Kako Kk Carbon brush for electric machine
EP1662640A1 (en) * 2003-09-04 2006-05-31 Totan Kako Co., Ltd. Carbon brush for electrical machine
EP1662640A4 (en) * 2003-09-04 2006-12-27 Totan Kako Co Ltd Carbon brush for electrical machine
CN100388600C (en) * 2003-09-04 2008-05-14 东炭化工株式会社 Carbon brush for electric machine
US20080278026A1 (en) * 2004-04-02 2008-11-13 Aisin Seiki Kabushiki Kaisha Graphite Brush, and a Motor With Graphite Brush
US20050236925A1 (en) * 2004-04-27 2005-10-27 Aisin Seiki Kabushiki Kaisha Metal-graphite brush and motor including a metal-graphite brush
EP1592099A1 (en) * 2004-04-27 2005-11-02 Aisin Seiki Kabushiki Kaisha Metal-graphite brush and motor including a metal-graphite brush
US7038351B2 (en) 2004-04-27 2006-05-02 Aisin Seiki Kabushiki Kaisha Metal-graphite brush and motor including a metal-graphite brush

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