Method of winding a magnetic deflection yoke

Claim 1

A method of winding a cathode ray tube magnetic deflection yoke with winding end turns produced in situ in defined bundles located radially outwardly from the axial portion of the winding, comprising the steps of: (a) providing a subassembly comprising an annular core portion and first and second end caps at each end of said core portion forming permanent operative parts of said yoke, said end caps being of non-electrically conductive non-magnetic material and comprising a plurality of hook members separated by a plurality of slots, said plurality of slots being aligned to form longitudinal troughs along the axis of said core portion and said hooks being radially directed and spaced around the perimeter of said end caps to define corresponding first and second annular channels displaced radially outwardly from said longitudinal troughs, and using said subassembly as a wire forming and retaining tool by: (b) feeding wire: under tension along one of said troughs toward said first end cap, through the slot in said first end cap defining the end of said one trough, radially outwardly between and behind the hook members flanking said slot and then under tension along said annular channel to another of the hooks in said first end cap, then under tension in the reverse axial direction through the slot and trough immediately beyond said other of the hooks, (c) hooking said wire in like manner behind the corresponding one of the hook members in said second end cap and feeding said wire in like manner but in the opposite direction along said second annular channel, and (d) continuing feeding said wire back and forth between said end caps to form coil loops having axially directed longitudinal portions and annularly directed end turns portions, said end turns being formed and held in defined bundles located radially outwardly from said longitudinal portions by said annular channels formed by said hook members.

Claim 2

A method of winding a cathode ray tube magnetic deflection yoke with winding end turns produced in situ in defined bundles located radially outwardly from the axial portion of the winding, comprising the steps of: (a) providing a subassembly comprising an annular core portion and first and second end caps at each end of said core portion forming permanent operative parts of said yoke, said end caps being of non-electrically conductive non-magnetic material and comprising a plurality of hook members separated by a plurality of slots, said plurality of slots being aligned to form longitudinal troughs along the axis of said core portion and said hooks being radially directed and spaced around the perimeter of said end caps to define corresponding first and second annular channels displaced radially outwardly from said longitudinal troughs, and using said subassembly as a wire forming and retaining tool by: (b) feeding wire: under tension along one of said troughs toward said first end cap, through the slot in said first end cap defining the end of said one trough, radially outwardly between and behind the hook members flanking said slot and then under tension along said annular channel to another of the hooks in said first end cap, then under tension in the reverse axial direction through the slot and trough immediately beyond said other of the hooks, (c) hooking said wire in like manner behind the corresponding one of the hook members in said second end cap and feeding said wire in like manner but in the opposite direction along said second annular channel, and (d) continuing feeding said wire back and forth between said end caps to form coil loops having axially directed longitudinal portions and annularly directed end turns portions, said end turns being formed and held in defined bundles located radially outwardly from said longitudinal portions by said annular channels formed by said hook members.