Joints in bonding of electrical wires
First Claim
1. A method of attaching armature wire ends of electric motors to commutator tines wherein said armature wires have a titanium oxide-containing insulation coating of a selected thickness comprising the steps of:
- a) roughening the surface of said tines to a depth of at least about the thickness of said insulation coating;
b) placing armature wire ends in contact with said roughened tine surfaces; and
c) fusing said armature wire ends to said tines.
1 Assignment
0 Petitions
Accused Products
Abstract
A method is disclosed for improving the metallurgical bond between the end of an armature wire of an electric motor and the connector riser or tine on the motor armature. The armature wire has a titanium oxide-containing insulation coating. The titanium oxide content improves the resistance of the wire to erosive forces which occur during the winding operation but it also tends to interfere with the metallurgical bond between the wire and the riser or tine. The disclosed method involves the roughening of the surface of the riser or tine at least to a depth equal to the thickness of the insulation. Grit or vapor blasting with silica glass beads as well as other roughening techniques are disclosed.
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Citations
8 Claims
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1. A method of attaching armature wire ends of electric motors to commutator tines wherein said armature wires have a titanium oxide-containing insulation coating of a selected thickness comprising the steps of:
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a) roughening the surface of said tines to a depth of at least about the thickness of said insulation coating; b) placing armature wire ends in contact with said roughened tine surfaces; and c) fusing said armature wire ends to said tines. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification