Intercalated graphite containing electrical motor brushes and other contacts
AssigneeIntercal Company
InventorFerdinand L. Vogel
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Abstract
An electric motor brush or other electrical contact fabricated with intercalated graphite exhibits improved electrical conductivity, strength and performance when compared with electrical brushes made with non-intercalated graphite or with carbon. Such contacts may be formed by filling a mold of the appropriate shape with intercalated graphite powder and applying sufficient pressure and heat to produce a coherent mass. The ability of intercalated graphite powder to be compacted in such a fashion leads to economic methods of manufacturing electrical contacts. The properties of these contacts may be further improved by the incorporation of metal powder, organic polymers or ceramic powders into the intercalated graphite prior to pressing.
Claims20
An electrical contact comprising a compacted body formed from an intercalated graphite which is stable in air and at elevated temperature, said body being essentially free of separately added copper, nickel, silver, molybdenum or tungsten metal powder.
An electrical contact formed by compacting intercalated graphite particles at a pressure of between about 1,000 pounds per square inch and about 150,000 pounds per square inch and at a temperature of between about 20.degree. C. and about 1000.degree. C.
Dependencies are inferred from the claim text.