The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 25, 2012
Filed:
Aug. 21, 2008
Christophe Jude Day, Beverly, MA (US);
Mark Douglas Ehresman, Haverhill, MA (US);
Clifford Edward Allen, Jr., Newbury, MA (US);
Mark Joseph Gleason, Madisonville, KY (US);
Michael Joseph Gambone, Mason, OH (US);
Christophe Jude Day, Beverly, MA (US);
Mark Douglas Ehresman, Haverhill, MA (US);
Clifford Edward Allen, Jr., Newbury, MA (US);
Mark Joseph Gleason, Madisonville, KY (US);
Michael Joseph Gambone, Mason, OH (US);
General Electric Company, Schenectady, NY (US);
Abstract
A method for making a test specimen includes machining out a chordal core from an annular forging and machining the specimen symmetrical about a chordal axis of the core. A linear cutting tool such as a wire EDM machine is used for the machining which includes at least a partially cylindrical cutting about the chordal axis with the linear cutting tool. A copper or brass tubular EDM electrode may be used. The chordal core may be machined from fat of the forging. The test specimen may have with a gauge section diameter in a range of 0.1-0.5 inches. The EDM process may include directing jets of machining fluid or dielectric in up and down along a cutting portion of an EDM wire of the EDM machine or performing the EDM process in a tank of machining fluid or dielectric with the annular forging submerged in the fluid or dielectric.