초록 ▼

Commutators for electro-dynamic machines such as electric motors comprise a cylindrical shell of insulated commutators bars, each of which has an outer layer with tangs extending from the outer layer and an inner layer with anchoring tabs extending therefrom. The commutating bars are typically produ

Commutators for electro-dynamic machines such as electric motors comprise a cylindrical shell of insulated commutators bars, each of which has an outer layer with tangs extending from the outer layer and an inner layer with anchoring tabs extending therefrom. The commutating bars are typically produced from two strips of copper or other conductive metal. The inner layer may be formed of a thinner but stronger material, even of a non-conductive material, but is normally preferable to use two strips of copper to facilitate fusion of the materials together. The first strip, which is typically somewhat thicker than the second, is formed by punching so that partially formed tangs extend laterally from the side of the strip. The second strip is formed in a similar process to provide anchoring tabs extending from the sides of the second strip. These commutators can be produced economically and efficiently and can be adapted to a wide variety of applications and requirements.

대표청구항 ▼

[ What is claimed is:] [1.]1. A commutator for a dynamoelectric machine comprising:a cylindrically arranged ring of linearly extending commutator bars, each of said bars comprising an outer layer having a tang extending therefrom and an inner layer having at least one anchoring lug extending therefr

[ What is claimed is:] [1.]1. A commutator for a dynamoelectric machine comprising:a cylindrically arranged ring of linearly extending commutator bars, each of said bars comprising an outer layer having a tang extending therefrom and an inner layer having at least one anchoring lug extending therefrom;said bars extending substantially parallel to an axis of said commutator, being separated from other bars by axially extending slits, and being formed by:joining a first strip of metal having tangs extending laterally therefrom to a second strip of metal having anchoring tabs extending therefrom to form a composite strip;forming said composite strip into a cylindrical shell, with said first strip forming an outer layer of said shell and said second strip forming an inner layer of said shell; andslitting said shell to form said cylindrically arranged ring of commutator bars.