Abstract An inductor for inductively heating an elongated workpiece having a length, central axis, a first cylindrical portion with a radius r and a second cylindrical portion with a radius r'', wherein the cylindrical portions are generally concentric with the axis and r and r'' are substantially different. This inductor includes first and second generally parallel conductors extending substantially the complete length of the workpiece, cross-over conductors connecting the parallel conductors at their respective ends and the parallel conductors each have a first section adjacent the first cylindrical portion of the workpiece and a second section adjacent the second cylindrical portion of the workpiece with the effective widths of these sections being different to effect uniform heating of the workpiece.
In an inductor for inductively heating an elongated workpiece rotating about a central axis and having a length, a first cylindrical portion with a radius r and a second cylindrical portion with a radius r'', wherein said cylindrical portions are generally concentric with said central axis and r is greater than r'', said inductor comprising: first and second generally parallel conductors extending substantially the complete length of said workpiece in an axial direction and over both of said cylindrical portions, one of said parallel conductors being separated into two portions, cross-over conductors connecting said parallel conductors at their respective ends and lead-in conductor means at said separation of said one parallel conductor for connecting said inductor to a power means, the improvement comprising: at least one of said parallel conductors having a first section adjacent said first cylindrical portion and a second section adjacent said second cylindrical portion, the effective width of said first section being x, the width of said second section being y, and x being greater than y, and whereby said sections remain adjacent said respectivE portions during heating.
Claim 2
Dependent Claim
182 words
In an inductor for inductively heating an elongated workpiece rotating about a central axis and having a length, a first cylindrical portion with a radius r and a second cylindrical portion with a radius r'', wherein said cylindrical portions are generally concentric with said central axis and r is greater than r'', said inductor comprising: first and second generally parallel conductors extending substantially the complete length of said workpiece in an axial direction and over both of said cylindrical portions, one of said parallel conductors being separated into two portions, cross-over conductors connecting said parallel conductors at their respective ends and lead-in conductor means at said separation of said one parallel conductor for connecting said inductor to a power means, the improvement comprising: at least one of said parallel conductors having a first section adjacent said first cylindrical portion and a second section adjacent said second cylindrical portion, the effective width of said first section being x, the width of said second section being y, and x being greater than y, and whereby said sections remain adjacent said respectivE portions during heating.