Armature winding method and apparatus
First Claim
1. In an armature winding machine for winding an armature of the type having an armature shaft, a core having coil-receiving slots mounted on said shaft, and a commutator mounted on said shaft, said commutator having coil lead-receiving tangs,said armature winding machine having a winding station,means for holding an armature in said winding station,at least one wire guiding flier for winding coils of wire in said coil-receiving slots,wire clamp means actuated to grip a stretch of wire extending from said flier at the end of the winding of one armature in said winding station until the commencement of the winding of the next armature in said winding station, anddrive means for moving said wire clamp means,the improvement comprising:
- wire trimmer means having a sharp edge,means supporting said wire trimmer means for movement between a first position wherein said sharp edge is closely adjacent a commutator tang located at a predetermined rotary position in said winding station and a stretch of wire extending from said tang to said wire clamp means extends over said sharp edge and a second position wherein said sharp edge is substantially spaced from said tang, andsaid drive means moves said wire clamp means in a direction generally perpendicular to said sharp edge to create a high concentration of stresses in the wire extending over said sharp edge thereby to sever said stretch of wire at said edge.
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Accused Products
Abstract
A double flier armature winding machine is provided with two wire trimming assemblies, one for each flier, each having a trimming head with a sharp edge against which a lead wire is severed by abruptly moving a wire clamp gripped to the lead wire in a direction to cause the wire to be stretched over the sharp edge.
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Citations
12 Claims
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1. In an armature winding machine for winding an armature of the type having an armature shaft, a core having coil-receiving slots mounted on said shaft, and a commutator mounted on said shaft, said commutator having coil lead-receiving tangs,
said armature winding machine having a winding station, means for holding an armature in said winding station, at least one wire guiding flier for winding coils of wire in said coil-receiving slots, wire clamp means actuated to grip a stretch of wire extending from said flier at the end of the winding of one armature in said winding station until the commencement of the winding of the next armature in said winding station, and drive means for moving said wire clamp means, the improvement comprising: -
wire trimmer means having a sharp edge, means supporting said wire trimmer means for movement between a first position wherein said sharp edge is closely adjacent a commutator tang located at a predetermined rotary position in said winding station and a stretch of wire extending from said tang to said wire clamp means extends over said sharp edge and a second position wherein said sharp edge is substantially spaced from said tang, and said drive means moves said wire clamp means in a direction generally perpendicular to said sharp edge to create a high concentration of stresses in the wire extending over said sharp edge thereby to sever said stretch of wire at said edge. - View Dependent Claims (2, 3, 4)
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5. In an armature winding machine for winding an armature of the type having an armature shaft, a core having coil-receiving slots mounted on said shaft, and a commutator mounted on said shaft, said commutator having coil lead-receiving tangs
said armature winding machine having a winding station, means for holding an armature in said winding station, at least one wire guiding flier adapted to rotate to wind coils of wire in said coil-receiving slots, a commutator shield assembly comprising an inner shield having at least one notch for exposing a commutator tang to enable wire leading from said flier to be hooked around said exposed tang, and an outer shield movable between a first, extended position in which it covers said notch and a second, retracted position wherein it uncovers said notch, wire clamp means actuated to grip a stretch of wire extending from said flier at the end of the winding of one armature in said winding station until the commencement of the winding of the next armature in said winding station, and drive means for moving said wire clamp means, the improvement comprising: -
wire trimmer means having a sharp edge, means supporting said wire trimmer means for pivotal movement between a first position wherein said sharp edge is substantially spaced from said tang to a second position wherein said sharp edge is closely adjacent a commutator tang located at a predetermined rotary position in said winding station and a stretch of wire extending from said tang to said wire clamp means extends over said sharp edge, wire trimmer drive means interconnecting said outer shield and said wire trimmer means for moving said wire trimmer means to its said first position when said outer shield is moving to its first, extended position and moving said wire trimmer means to its said second position when said outer shield is moving to its second, retracted position, and wherein said drive means moves said wire clamp means in a direction generally perpendicular to said sharp edge to create a high concentration of stresses in the wire extending over said sharp edge thereby to sever said stretch of wire at said edge. - View Dependent Claims (6, 7, 8, 9)
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10. In a method of machine winding an armature of the type having a commutator with wire receiving tangs utilizing a flier type armature winder, the method being of the type wherein there is a wire segment gripped by a clamp and engaging a communator tang, the improvement comprising the severing of said wire segment closely adjacent said tang by providing a wire trimming member having a sharp edge, engaging said wire segment at the point where it is to be severed by said sharp edge by moving said trimmer member relative to said armature, and moving said clamp in a direction to cause said wire to be stretched across said sharp edge.
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11. In a method of machine winding an armature of the type having a commutator with lead recieving tangs utilizing a flier type armature winding machine, the improvement comprising the steps of:
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(1) clamping the wire extending from the flier by a clamp, (2) locating the armature in the winding machine with a selected tang in position to receive a start wire, (3) rotating the flier as required to loop the wire about said selected tang whereupon a wire segment extends from the clamped portion thereof to the selected tang, (4) relatively moving the armature and a wire trimming member having a sharp edge so that said sharp edge and said selected tang are closely adjacent one another and said wire segment extends over said sharp edge, and (5) severing said wire segment at said sharp edge by moving said clamp away from said sharp edge. - View Dependent Claims (12)
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Specification