Method of pre-applying soldering material to a motor commutator

Details Method of pre-applying soldering material to a motor commutator Method of pre-applying soldering material to a motor commutator

1993-01-27

1995-08-15

Hall, Carl E.

Metal working

Method of mechanical manufacture

Electrical device making

228254, 228258, 310234, H01R 4300

Patent

active

054408008

ABSTRACT:
A method of adhering in advance a soldering material to a location on each of a plurality of claw-shaped portions of a commutator at which a winding for the armature of an electric motor is to be electrically connected thereto, for ensuring a strong and reliable electrical connection between the windings and the claw-shaped portions.
A plurality of narrow grooves are defined in the claw-shaped portions and the narrow grooves are charged with molten soldering material, which solidifies therein. The thus-solidified soldering material is thereafter re-melted by heat produced at the time of resistance welding of the windings to the claw-shaped portions to thereby reinforce the electrical connection between the claw-shaped portions and the windings and to prevent an increase in the electric resistance between the windings and the claw-shaped portions.

REFERENCES:
patent: 2400590 (1946-05-01), Meyerhoefer
patent: 2653258 (1953-09-01), Allen
patent: 4862575 (1989-09-01), Shirai et al.

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