Nixon & Vanderhye
Method of forming an integral water-cooled circuit ring bus bar assembly for high frequency generators
 An improved circuit ring and method of assembly for use in electrical machines, such as power generators, motors and the like, including an integral bus bar for conducting current to a machine terminal. The circuit ring is fabricated from hollow copper tubing of a rectangular cross-section and of a size which will allow electrical circuit leads to be brazed thereto in such a manner as to avoid damage to insulation. Cooling fluid is passed through the tubing so that the rings can be assembled and used in high power density electrical machinery. 
General Electric Company
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James M. James M.
Anderson Fogarty