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 1128
the 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 % in., and the commutator then thoroughlycleaned with flne… … ^oQor\tro\\Qr Fig. 474 \To Controller 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…
