Method of manufacturing commutator

Details Method of manufacturing commutator Method of manufacturing commutator

Filed on

1975-01-14

Date issued

1976-05-25

Examiner

Hall, Carl E.

Patent Class

Metal working

SubClass

Method of mechanical manufacture

SubSubClass

Electrical device making

Other Related Categories

29418, H01R 4308

Type

Patent

Status

active

Patent number

039583260

Description

ABSTRACT:
A method of manufacturing a commutator whereby first, a straight length of copper metal is formed into a circular commutator blank with a parallel space formed by both ends of the straight length of metal; second, the commutator blank is positioned on a lower die of an extrusion press machine in order that the parallel space of the commutator blank is aligned with a plane on which one of cutting edges of a mandrel of the extrusion press machine is placed; third, the commutator blank is extruded to form a segment ring having parallel gaps inside the segment and bridging portions formed across the outer ends of the gaps, whereby the parallel space is elongated along one of the bridging portions; fourth, the segment ring is molded with an insulating material; finally, the outer surface of the segment ring is cut to remove the bridging portions, thereby to complete the commutator.

REFERENCES:
patent: 3102965 (1963-09-01), Ickes et al.
patent: 3423819 (1969-01-01), Carlson et al.

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