Metal working – Method of mechanical manufacture – Electrical device making
Patent
1996-06-25
1998-10-13
Arbes, Carl J.
Metal working
Method of mechanical manufacture
Electrical device making
204212, 204224M, H01R 4300
Patent
active
058194002
ABSTRACT:
An electrode assembly for electrochemically etching the rifling of a gun barrel and method of manufacturing the electrode assembly is disclosed. The electrode assembly includes a unitary cage formed of insulative material, such as a thermoplastic polymer like Nylon, disposed about an electrically conductive core member. The core member includes a generally cylindrical body portion that has an outer generally cylindrical surface with a plurality of helical grooves disposed the length of the body portion, and a threaded member that coaxially extends from one end of the body portion for connecting to a rifling rod. The grooves have a generally dovetail cross-section and at least one radially extending recess disposed therein. The unitary cage has a strip portion disposed within each helical groove and end portions disposed at each longitudinal end of the body portion of the core member. The electrode assembly is formed by injection molding the polymeric material about the body portion of the core member and into the grooves. The polymeric material is turned and milled away to expose the outer cylindrical surface of the core member to form the unitary cage.
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Arbes Carl J.
Smith & Wesson Corp.
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