| 摘要 |
The invention relates to a coil comprising a hollow former on which a plurality of same-length conductors are wound, together with connection means between the conductors and an electrical power supply for the coil, according to the invention the conductors are insulated, mutually parallel, and angularly offset, being wound together no said former so that each conductor forms spiral turns that are stacked on and interposed between the spiral turns of the other conductors, said conductors forming first and second windings about a common winding axis, one of the free ends of each conductor being accessible on the outer periphery of the first winding while the other free end of the conductor is accessible on the outer periphery of the second winding.
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