Twentieth century hand-book for steam engineers and electricians with questions and answers; a practical non-technical treatise .. (1913)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & company · leaf 1122
he machine is cold. Kever 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 fine… … To Controller Fig. 474 \ To Control/er 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…
