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 1150
inthe starting box, to the motor armature and it begins torevolve, and as we continue to move the arm to the right,the armature gains in speed because we admit more current Electric Motors 1115 to it by cutting out more and more resistance. When thearmature attains full speed, the arm comes in… … Fig. 487 When the armature has attained its normal speed, thestarting box is no longer in use. If for any reason thecurrent ceases to flow, the little magnet M loses its magnet-ism and releases the arm, which (actuated by a spring)flies back and opens the circuit so that, should the currentsuddenly…
