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 1129
its main shaft through a small belt running 1094 Steam Engineering around the armature shaft. (See Fig. 474.) By meansof magnetic clutches and bevel gears^ a pinion shaft isrotated^ which moves the rack and the rocker arm and soshifts the brushes on the commutator to maintain a sparkof about % in.…
