History of the transformer . s are the primary or ex-citing, the four small coils onthe poles of the double mag-nets are the secondary coils. The lever MF was of iron,and served to weaken theeffects of induction, inas-much as it formed a magneticshort circuit. Here we findfor the first time the employ-ment of a regulating 15 illustrates the methodof connection.* As alreadymentioned, Fuller succeededin setting aside many of thedefects which were adheredto in the many very badlyconstructed transformers ofhis predecessors. While he was busy carrying hisinvention into practice, he beca


History of the transformer . s are the primary or ex-citing, the four small coils onthe poles of the double mag-nets are the secondary coils. The lever MF was of iron,and served to weaken theeffects of induction, inas-much as it formed a magneticshort circuit. Here we findfor the first time the employ-ment of a regulating 15 illustrates the methodof connection.* As alreadymentioned, Fuller succeededin setting aside many of thedefects which were adheredto in the many very badlyconstructed transformers ofhis predecessors. While he was busy carrying hisinvention into practice, he became a sacrifice to hisover-great activity, and on the 15th February, 1879, hewas taken away by illness. Only a few hours beforehis death, he called his foreman to himself, and ex-plained to him the principles of his system. Afterending his explanations, he asked him if he hadunderstood all that he had said, and, on receivingan answer from him that he had, he smiled con- * See also Scientific American, 5tb April, 1879, p. HISTORY OF THE TSANSFOEMEE. 21 tentedly, and a few moments later he ended a usefullife, which had given so much promise of good results. In the year 1880 Edward Henry Gordon took out E. h. Gordon, ithe English patent No. 41,826. Gordon had con-structed an electric lamp based on the fact that when Fig 15. 1880.


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