Twentieth century handbook for steam engineers and electricians, with questions and answers; a practical nontechnical treatise .. (1916)
Swingle, Calvin F. (Calvin Franklin), b. 1846 · Chicago, F.J. Drake & company · leaf 1128
e machine is cold. Never use a file, emery cloth or cro-cus, on the commutator. New blocks will sometimes causeflashing, due to the presence of sap in the wood. The ma-chine should be run for a few hours with a slightly longerspark, say y2 in., and the commutator then thoroughlycleaned with fine… … To Controller Fig. 474 \To Control fer We will give only one of the several forms of regulatorsused with this system. The form 1 regulator is placed on the frame of themachine beneath the commutator, and a constant motion isimparted to its main shaft through a small belt running 1094 Steam…
