Twentieth century handbook for steam engineers and electricians, with questions and answers; a practical nontechnical treatise on the care and management of steam engines, boilers and electric machinery (1922)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & company · leaf 1082
tion with Fig. 426. Fig. 441 shows the construction of theGramme ring, so named from the inventor, Gramme. Thewinding is on a ring coil made up of soft iron punchings25 mils thick. The wires on the outer surface are activejhaving electro-motive force induced in them, and called ar-mature inductors.… … Fig. 442 EIGHT SECTION EIGHTY COIL RING WINDING ON A SMOOTH KINGCORE, WITH EIGHTY BAR COMMUTATOR. FOR DIRECT CURRENT volutions of phosphor-bronze wire in sizes varying fromNo. 20 up to 14, laid on tightly over a mica insulation andsweated with solder all the way round. Eeferring to 443 it will be…
