Open coil EMP apparatus

Abstract

An EMP apparatus includes first and second opposed field shaper segments. The field shaper segments include opposed working portions. First and second coil segments respectively support the first and second opposed field shaper segments. The coil segments are electrically operable and in eddy current contact with the field shaper segments. Insulators are disposed between the field shaper segments and the coil segments. A frame moveably supports the coil segments for movement between open and closed positions of the coil segments. Metal stock can be disposed between the shaper segment working portions by opening the shaper and coil segments.

1 . An EMP apparatus comprising:
 first and second opposed field shaper segments;   said field shaper segments including opposed working portions;   first and second coil segments respectively supporting said first and second opposed field shaper segments;   said coil segments being electrically operable and in eddy current contact with said field shaper segments;   insulators disposed between said field shaper segments and said coil segments; and   a frame moveably supporting said coil segments for movement between open and closed positions of said coil segments;   whereby metal stock can be disposed between said shaper segment working portions by opening said shaper and coil segments.   
   
   
       2 . The EMP apparatus of  claim 1 , wherein said frame is a clamp. 
   
   
       3 . The EMP apparatus of  claim 1 , wherein said frame is hinged. 
   
   
       4 . The EMP apparatus of  claim 3 , wherein said coil segments are arranged in a clamshell configuration. 
   
   
       5 . The EMP apparatus of  claim 1 , wherein coil segments have opposed curvilinear recesses and said field shaper segments have corresponding curvilinear protrusions. 
   
   
       6 . The EMP apparatus of  claim 1 , wherein said field shaper segments are disposed to open and close with movement of said coil segments. 
   
   
       7 . The EMP apparatus of  claim 1 , wherein said field shaper segments are disposed in a perpendicular disposition to an open and closing direction of said coil segments. 
   
   
       8 . The EMP apparatus of  claim 1 , including a strap mounted on at least one of said coil segments to secure said field shaper segments in said coil segments. 
   
   
       9 . A method of working a metal tube segment comprising the steps of:
 providing an EMP apparatus including:
 first and second opposed field shaper segments; 
 said shaper segments including opposed working portions; 
 first and second coil segments respectively supporting said first and second opposed field shaper segments; 
 said coil segments being electrically operable and in eddy current contact with said field shaper segments; 
 insulators disposed between said shaper segments and said coil segments; and 
 a frame moveably supporting said coil segments for movement between open and closed positions of said coil segments; 
   disposing a metal tube between said shaper segment working portions by opening said shaper and coil segments;   moving said frame to move said coil segments into said closed position;   applying a pulse of electric current through said coil segments to work said metal tube; and   removing said metal tube by opening said shaper and coil segments.   
   
   
       10 . The method of  claim 9 , including the step of:
 clamping said coil segments to secure said coil segments in said closed position.   
   
   
       11 . The method of  claim 9 , wherein said frame includes a hinge for moving said coil segments between said open and closed positions. 
   
   
       12 . The method of  claim 9 , wherein said field shaper segments open and close with movement of said coil segments. 
   
   
       13 . The method of  claim 9 , including the step of:
 disposing said field shaper segments in a perpendicular disposition to an open and closing direction of said coil segments.   
   
   
       14 . The method of  claim 9 , including the step of:
 mounting a strap on at least one of said coil segments to secure said field shaper segments in said coil segments.