Electric brush

Details Electric brush Electric brush

1980-04-09

1983-11-15

Lewis, Michael L.

Stock material or miscellaneous articles

All metal or with adjacent metals

Having magnetic properties, or preformed fiber orientation...

310248, 310252, 428161, 428652, 428653, 428656, 428661, 428671, 428673, 428674, 428675, 428678, 428670, 428607, H01R 3900

Patent

active

044156359

ABSTRACT:
A multifiber electrical brush formed of an electrically conductive matrix material having plural electrically conducting fiber wires embedded therein and extending therefrom, wherein the fiber wires have a diameter varying from 1 to 120.mu.m, a length on the order of 100 times greater than the diameter thereof, and a packing density between 1-25%. Suitable materials for the fiber wires are platinum, gold, silver, copper, palladium, or niobium which may be embedded in a copper, silver, or other suitable matrix material, or copper embedded in an aluminum matrix. The fiber wires may be provided with a coating of a suitable barrier material on the lateral surfaces thereof as may be required to protect the fiber wires from etching during removal of the matrix material, or to prevent and/or retard interdiffusion between the matrix material and the fiber wire material during annealing or hot-forming of brush stock, and/or to impart improved electrical performance to the resultant electrical brush. The electrical brush is fabricated typically by drawing, cutting, bundling and redrawing metal fiber wires, with or without a coating or casing of a barrier material, packed in a tube of matrix material, whereupon after shaping of the multi-filamentary ends to the shape of an object to which the brush is to make contact, the matrix is etched away to a predetermined length, preferably under high centrifugal forces in a centrifuge and/or with the application of ultrasound.

REFERENCES:
patent: 3254189 (1966-05-01), Evanicsko, Jr. et al.
patent: 3357824 (1967-12-01), Saarivinta
patent: 3733573 (1973-05-01), Dieterich
patent: 3821024 (1974-06-01), Wilkin et al.
patent: 3828417 (1974-08-01), Divecha
patent: 3840350 (1974-10-01), Tucker, Jr.
patent: 4226917 (1980-10-01), Tsuruoka, Jr.
patent: 4277708 (1981-07-01), McNab et al.
Adkins, C. M. et al., Electrical Contacts ILL Techn., Chicago, pp. 1-14, (1979).
Weast, R. C., Ed; Handbook Chemistry and Physics CRC Co., pp. B87, 134, 150, (1970).

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