1. An armature comprising:
a core including a plurality of teeth extending in a radial shape with a slot formed between each of the plurality of teeth;
first winding coil sections formed in a plurality of layers by winding coil wire a plurality of times spanning different respective sets of least two of the teeth, while shifting by one slot each time toward one side in the circumferential direction of the core; and
second winding coil sections formed in a plurality of layers by winding coil wire a plurality of times spanning different respective sets of least two of the teeth, while shifting by one slot each time toward the other side in the circumferential direction of the core.
2. The armature of claim 1, wherein:
an end portion at one side in the core circumferential direction of a final wound layer out of the plurality of the first winding coil sections is wound so as to be disposed flat against one side face of the tooth, from a base end side to a leading end side of the tooth.
3. The armature of claim 1, wherein:
the core includes eighteen teeth as the plurality of teeth;
the plurality of the first winding coil sections form 1st layer to 4th layer first winding coil sections, each wound a plurality of times spanning a different set of four of the teeth; and
the plurality of the second winding coil sections form 5th layer to 9th layer second winding coil sections that start winding at the slot where an end portion at the other side in the core circumferential direction of the 4th layer first winding coil section has been inserted, the 4th layer first winding coil section forming the final layer of the plurality of the first winding coil sections, and that are each wound a plurality of times spanning a different set of four of the teeth.
4. The armature of any one of claim 1, wherein:
the plurality of the first winding coil sections and the plurality of the second winding coil sections are each wound across at least two of the teeth in a tightening direction.
5. The armature of any one of claim 1, wherein:
the plurality of the first winding coil sections are each wound across a set of at least two of the teeth in a tightening direction; and
the plurality of the second winding coil sections are each wound across a set of at least two of the teeth in a loosening direction.
6. The armature of claim 1, wherein:
the plurality of the first winding coil sections are each wound across a set of at least two of the teeth in a loosening direction; and
the plurality of the second winding coil sections are each wound across a set of at least two of the teeth in a tightening direction.
7. A manufacturing method of an armature comprising:
a first process of, on a core including a plurality of teeth extending in a radial shape and with a slot formed between each of the plurality of teeth, winding a plurality of first winding coil sections by winding coil wire a plurality of times spanning different respective sets of at least two teeth, while shifting one slot each time toward one side in the circumferential direction of the core; and
a second process of winding a plurality of second winding coil sections by winding coil wire a plurality of times spanning different respective sets of at least two teeth, while shifting one slot each time toward the other side in the circumferential direction of the core.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. In a progressive addition lens comprising a distance portion and a near portion, wherein diopter power gradually increases from the distance portion to the near portion, the improvement comprising base in prism in the lens, wherein amount of base in prism increases from the distance portion to the near portion.
2. The improvement of claim 1 wherein amount of base in prism varies in a range of about 0 to 1.5 diopters.
3. The improvement of claim 1 wherein base in prism is induced by changing thickness of the lens in different amounts from the distance portion to the near portion.
4. The improvement of claim 1 wherein base in prism is induced by decentering optical center of the lens in different amounts from the distance portion to the near portion.
5. A progressive addition lens comprising a distance portion, an intermediate portion and a near portion, wherein diopter power and base in prism continually change in the intermediate portion between the distance portion and the near portion.
6. The progressive addition lens of claim 5 wherein amount of base in prism varies in a range of about 0 to 1.5 diopters.
7. The progressive addition lens of claim 5 wherein base in prism is induced by changing thickness of the lens in different amounts in the intermediate portion between the distance portion and the near portion.
8. The progressive addition lens of claim 5 wherein base in prism is induced by de-centering optical center of the lens in different amounts in the intermediate portion between the distance portion and the near portion.
9. A pair of glasses comprising:
a frame;
a first progressive addition lens in the frame comprising a distance portion and a near portion, wherein diopter power and base in prism gradually increase from the distance portion to the near portion; and
a second progressive addition lens in the frame comprising a distance portion and a near portion, wherein diopter power and base in prism gradually increase from the distance portion to the near portion.
10. The pair of glasses of claim 9 wherein amount of base in prism in each lens varies in a range of about 0 to 1.5 diopters.
11. The pair of glasses of claim 9 wherein base in prism in each lens is induced by changing thickness of the lens in different amounts between the distance portion and the near portion.
12. The pair of glasses of claim 9 wherein base in prism in each lens is induced by de-centering optical center of the lens in different amounts between the distance portion and the near portion.
13. The pair of glasses of claim 9 wherein amount of base in prism in the first lens is different from in the second lens.
14. A progressive addition lens comprising a distance portion, an intermediate portion and a near portion, wherein diopter power continually changes in the intermediate portion between the distance portion and the near portion and wherein base in prism is greater in the near portion than in the distance portion.
15. The progressive addition lens of claim 14 wherein difference in amount of base in prism between the near portion and the distance portion is at least 0.5 diopters.
16. The progressive addition lens of claim 14 wherein amount of base in prism varies in a range of about 0 to 1.5 diopters.
17. The progressive addition lens of claim 14 wherein amount of base in prism varies in a range of about 0 to 3 diopters.
18. A bifocal lens comprising a distance portion and a near portion, wherein diopter power is greater in the near portion than in the distance portion and wherein base in prism is greater in the near portion than in the distance portion.
19. The bifocal lens of claim 18 wherein difference in amount of base in prism between the near portion and the distance portion is at least 0.5 diopters.
20. The bifocal lens of claim 18 wherein amount of base in prism varies in a range of about 0 to 1.5 diopters.
21. The bifocal lens of claim 18 wherein amount of base in prism varies in a range of about 0 to 3 diopters.