Gage, Alfred P. (Alfred Payson), 1836-1903 · Boston, London, Ginn · leaf 596
Fig. 466. … THE INDUCTION COIL REVERSIBLE. 575 two halves of the spindle (E), which are carefully insulatedfrom each other. In Fig. 467 the commutator is shown, in-plan. The current enters the inner coil through the spring H,which carries a friction rollerworking on the commutator E;after traversing the coil…
Physics
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