Electric motor and method of manufacturing the same

The method of winding as claimed in claim 4 further comprising:

• a sixth step of rotating said armature at an angle 180+180/(4m+1) degree;
• a seventh step of winding said wire on said first coil former to guide said wire into another pair of slots to be wound at an m-slot pitch;
• and
• an eighth step of repeating said sixth and seventh steps two times.

A method of winding an armature of a four-poled dc motor composed of said armature having nine slots between adjacent core members and a commutator having the same number of commutator segments as said slots, said method comprising:

• a first step of placing on opposite sides of one of said core members a first and second coil formers each of which has a pair of guiding surfaces around said armature so that said pair of guiding surfaces of said first coil former is located to guide a wire into a first pair of said slots disposed at a two-slot pitch from each other and said pair of guiding surfaces of said second former is located to guide another wire into a second pair of said slots disposed at a two-slot pitch from each other;
• a second step of winding said wires respectively on said first and second coil formers concurrently to guide said wires into said first and second pair of slots respectively;
• a third step of rotating said armature at an angle of 200 degree;
• a fourth step of winding wires on said first and second coil formers concurrently to guide said wires into another two pair of slots disposed at a two-slot pitch from each other respectively;
• a fifth step of repeating said third and fourth steps two times;
• a sixth step of rotating said armature at an angle of 200 degree;
• a seventh step of winding said wire on said first coil former to guide said wire into another pair of slots to be wound at a two-slot pitch;
• and
• an eighth step of repeating said sixth and seventh steps two times.

A method of winding an armature of a four-poled dc motor composed of said armature having thirteen slots between adjacent core members and a commutator having the same number of commutator segments as said slots, said method comprising:

• a first step of placing on opposite sides of one of said core members a first and second coil formers each of which has a pair of guiding surfaces around said armature so that said pair of guiding surfaces of said first coil former is located to guide a wire into a first pair of said slots disposed at a three-slot pitch from each other and said pair of guiding surfaces of said second former is located to guide another wire into a second pair of said slots disposed at a three-slot pitch from each other;
• a second step of winding said wires respectively on said first and second coil formers concurrently to guide said wires into said first and second pair of slots respectively;
• a third step of rotating said armature at an angle of 193.8 degree;
• a fourth step of winding wires on said first and second coil formers concurrently to guide said wires into another two pair of slots disposed at a three-slot pitch from each other respectively;
• a fifth step of repeating said third and fourth steps four times;
• a sixth step of rotating said armature at an angle of 193.8 degree;
• a seventh step of winding said wire on said first coil former to guide said wire into another pair of slots to be wound at a three-slot pitch;
• and
• an eighth step of repeating said sixth and seventh steps two times.

A method of winding an armature of a four-poled dc motor composed of said armature having five slots between adjacent core members and a commutator having the same number of commutator segments as said slots, said method comprising:

• a first step of placing on opposite sides of one of said core members a first and second coil formers each of which has a pair of guiding surfaces around said armature so that said pair of guiding surfaces of said first coil former is located to guide a wire into a first pair of said slots disposed at a one-slot pitch from each other and said pair of guiding surfaces of said second former is located to guide another wire into a second pair of said slots disposed at a one-slot pitch from each other;
• a second step of winding said wires respectively on said first and second coil formers concurrently to guide said wires into said first and second pair of slots respectively;
• a third step of rotating said armature at an angle of 216 degree;
• a fourth step of winding said wire on said first coil former to guide said wire into another pair of slots to be wound at a one-slot pitch;
• and
• a fifth step of repeating said sixth and seventh steps two times.