Small, Sidney Aylmer, 1876- [from old catalog] · Chicago, F. J. Drake & co · leaf 385
t material obtainable and the insulation isintegral with the coil, no additional protection being re-quired in the slots. All armature coils are subjected toa very severe puncture test in addition to the full loadtest, which is made when the machine is assembled. 386 ELEMENTARY ELECTRICITY The… … Fig. 179. Brush-Rigging and Brush-Holders on Alternating CurrentEnd of Allis-Chalmers 500 K. W. Rotary Converter. keep the voltage between adjacent bars within conserva-tive limits, and is designed to give a liberal contact sur-face for the brushes; sparkless commutation and freedomfrom…
Electricity
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