I wrote: "The activator could be planar, or cylindrical, or conical, etc., with the stator shaped to mate surfaces."
Should have said: "The activator surface could be planar, or cylindrical, or conical, etc., with the *rotor* (armature) shaped to mate surfaces."
Best regards, Horace Heffner http://www.mtaonline.net/~hheffner/
