Multi-wire wiper contact for potentiometers and other electromec

Details Multi-wire wiper contact for potentiometers and other electromec Multi-wire wiper contact for potentiometers and other electromec

1974-09-30

1976-04-27

Lanham, C. W.

Metal working

Method of mechanical manufacture

Electrical device making

29630R, H01R 900

Patent

active

039524116

ABSTRACT:
A multi-wire wiper contact is shown formed from a plurality of conductive and nonconductive wires wrapped about a mandrel to form a flat set of wires helically wrapped into a coil. The wire coil is then masked with a desired pattern and the unmasked wire is plated with a conductive metal. The metal plate which forms on the unmasked portions of the wire does not form on those unmasked wires which are nonconductive. After plating, the masking is removed, one set of wire is cut, and the wire set and plated portions holding that set are removed from the mandrel in a continuous flat strand of wire with the nonconductive wire forming a parting line for the strand. The nonconductive wire is removed from the strand and the strand is then cut and shaped into a multi-wire wiper contact for use in potentiometers and other electromechanical devices.

REFERENCES:
patent: 1865256 (1932-06-01), Johannesen
patent: 3631592 (1972-01-01), Wilson
patent: 3653121 (1972-04-01), Moriyama et al.
patent: 3733573 (1973-05-01), Dieterich
patent: 3755892 (1973-09-01), Dieterich
patent: 3766646 (1973-10-01), Froebe et al.
patent: 3773628 (1973-11-01), Misawa et al.
patent: 3779842 (1973-12-01), Grunwald et al.
patent: 3795884 (1974-03-01), Kotaka
patent: 3818414 (1974-06-01), Davies et al.
patent: 3852878 (1974-12-01), Munro

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