GB791598A - Improvements relating to electrical contact brushes for high altitude electrical equipment - Google Patents

Improvements relating to electrical contact brushes for high altitude electrical equipment

Info

Publication number
GB791598A
GB791598A GB995855A GB995855A GB791598A GB 791598 A GB791598 A GB 791598A GB 995855 A GB995855 A GB 995855A GB 995855 A GB995855 A GB 995855A GB 791598 A GB791598 A GB 791598A
Authority
GB
United Kingdom
Prior art keywords
brush
epoxy resin
resin
impregnated
vacuum
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
GB995855A
Inventor
Trevor James Anderson
Walter Henry Parriss
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston Co Ltd
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 British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Priority to GB995855A priority Critical patent/GB791598A/en
Publication of GB791598A publication Critical patent/GB791598A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
    • H01B3/40—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes epoxy resins
    • 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

Abstract

791,598. Electric contact brushes. BRITISH THOMSON-HOUSTON CO., Ltd. March 28, 1956 [April 5, 1955], No. 9958/55. Class 140. An electric contact-making brush comprises a porous body of suitable brush material impregnated with an epoxy resin in admixture with a hardening agent, the mixture being polymerized, after impregnation into a substantially insoluble and infusible form. Specified brush material comprises carbon or graphite as its principle constituent; and a metallic constituent may be added. The epoxy resin may be a complex polyether derivative of either a polyhydric alcohol comprising epoxy groups or a polyhydric phenol containing epoxy groups. Suitable hardening agents are polycarboxylic acids, acid anhydrides and organic bases. A modifying resin such as a urea formaldehyde, amine formaldehyde, polyamide or phenol formaldehyde resin may be reacted with the epoxy resin. Impregnation may be effected by progressive dipping in an epoxy resin (in the liquid or molten state) to which a hardening agent has been added, or by a vacuum or vacuum and pressure technique. Polymerization of the resin within the impregnated brush may be accelerated by heat. In an example, a graphite brush is immersed in a liquid epoxy resin and hardener mixture comprising a condensation product of epichlorhydrin and diphenylolpropane mixed with diethylene triamine and impregnated by, means of vacuum and pressure. The impregnated brush is then baked.
GB995855A 1955-04-05 1955-04-05 Improvements relating to electrical contact brushes for high altitude electrical equipment Expired GB791598A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB995855A GB791598A (en) 1955-04-05 1955-04-05 Improvements relating to electrical contact brushes for high altitude electrical equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB995855A GB791598A (en) 1955-04-05 1955-04-05 Improvements relating to electrical contact brushes for high altitude electrical equipment

Publications (1)

Publication Number Publication Date
GB791598A true GB791598A (en) 1958-03-05

Family

ID=9881913

Family Applications (1)

Application Number Title Priority Date Filing Date
GB995855A Expired GB791598A (en) 1955-04-05 1955-04-05 Improvements relating to electrical contact brushes for high altitude electrical equipment

Country Status (1)

Country Link
GB (1) GB791598A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3844822A (en) * 1971-12-23 1974-10-29 Celanese Corp Production of uniformly resin impregnated carbon fiber ribbon

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3844822A (en) * 1971-12-23 1974-10-29 Celanese Corp Production of uniformly resin impregnated carbon fiber ribbon

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