GB761406A - Impregnated carbonaceous electrical contact brush - Google Patents

Impregnated carbonaceous electrical contact brush

Info

Publication number
GB761406A
GB761406A GB18967/54A GB1896754A GB761406A GB 761406 A GB761406 A GB 761406A GB 18967/54 A GB18967/54 A GB 18967/54A GB 1896754 A GB1896754 A GB 1896754A GB 761406 A GB761406 A GB 761406A
Authority
GB
United Kingdom
Prior art keywords
impregnated
resin
heated
stock
brush
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
GB18967/54A
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.)
Union Carbide Corp
Original Assignee
Union Carbide and Carbon 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 Union Carbide and Carbon Corp filed Critical Union Carbide and Carbon Corp
Publication of GB761406A publication Critical patent/GB761406A/en
Expired legal-status Critical Current

Links

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
    • H01R39/18—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

Landscapes

  • Motor Or Generator Current Collectors (AREA)

Abstract

761,406. Impregnated electric contact brushes. UNION CARBIDE & CARBON CORPORATION. June 29, 1954 [Aug. 5, 1953], No. 18967/54. Class 140. An electrical contact brush comprises a carbonaceous brush stock impregnated with an alkaline earth metal fluoride and silver sulphide, the alkaline earth metal fluoride being bonded in and to the brush by means of a coked resin. The resin may be a thermoplastic or thermosetting synthetic resin such as phenol-formaldehyde or coumarone-indene. In an example electrographitic brush stock is impregnated in an aqueous solution of barium acetate, after which it is heated to 650‹ C. to convert the acetate to the carbonate. The stock is then immersed in a solution of hydrofluoric acid, saturated with barium fluoride, whereby the barium carbonate is converted to the fluoride. It is then impregnated in a solution of a phenol formaldehyde resin in acetone, after which it is air dried, heated to cure the resin, packed in coke and heated to 400-700‹ C. to coke the resin. It is then impregnated with an aqueous solution of silver nitrate and immersed in an aqueous solution of ammonium hydrosulphide to convert the silver nitrate to silver sulphide. The stock is then oven-dried and finally packed in coke and heated at 400-700‹ C.
GB18967/54A 1953-08-05 1954-06-29 Impregnated carbonaceous electrical contact brush Expired GB761406A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US761406XA 1953-08-05 1953-08-05

Publications (1)

Publication Number Publication Date
GB761406A true GB761406A (en) 1956-11-14

Family

ID=22130158

Family Applications (1)

Application Number Title Priority Date Filing Date
GB18967/54A Expired GB761406A (en) 1953-08-05 1954-06-29 Impregnated carbonaceous electrical contact brush

Country Status (1)

Country Link
GB (1) GB761406A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1160085B (en) * 1957-12-02 1963-12-27 Gen Electric Brush made of carbon for making electrical contact

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1160085B (en) * 1957-12-02 1963-12-27 Gen Electric Brush made of carbon for making electrical contact

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