Patent ID: 6269531
Filing Date: 2001-08-07
Classification: H01F,Y10T

Abstract:
A method of making a heavy duty electrical coil comprising the steps of:(a) forming a multiplicity of identical elongated electrically conductive elements from at least one plate of electrically conductive material and with each of said elements having a male formation projecting beyond an edge of the respective element at one end and a female formation in the form of a cutout complementary to said male formation and opening at an edge of an opposite end of the respective element;(b) fitting the male formations of said elements into the female formations of adjoining elements to form respective joints between adjoining elements at which broad surfaces of said adjoining elements are substantially flush with one another;(c) joining a multiplicity of said elements together on a support into successive spaced turns of a helix; and(d) while said elements form said helix on said support, fusion bonding each male formation of a respective joint to the female formation of the adjoining element receiving same, thereby producing said coil.