Principles and practice of electrical engineering (1914)
Gray, Alexander, 1882-1921 · New York [etc.] McGraw-Hill Book Company, inc. · leaf 147
LES OF ELECTRICAL ENGINEERING [Chap, xix voltage release. Attached to the starting arm is the circularratchet C which moves with the arm and, engaging in the ratchetfrom below, is a pawl which is caused to press against the ratchetby the no-voltage release magnet M and to notch into the ratchetwhen… … Fig. 143.—Sliding contact type of speed regulator. 148. Controllers for Series Motors.—Such motors are largelyused for crane service and the controller used with them must bearranged to reverse the direction of rotation by reversing thearmature connections and must also give speed regulation…
Electrical engineering
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