Cyclopedia of architecture, carpentry, and building : a general reference work ... (1907)
American School of Correspondence · Chicago : American Technical Society · leaf 440
340 ELEVATORS 27 sufficient speed, one section after another of the series M-indingis cut out, leaving the motor entirely on the shunt winding M-lienIt has attained normal speed. By this means a regular speedunder any load is obtained, the series winding being used simplyto give the necessary… … Fig. 12. Direct Connected Electric Winding Engine. would vary with the load, and this would be more noticeable dur.ing a descent of the load than Avhen lifting, for it would accele=rate the descent at a rate that Mould be constantly increasino- untilthe end of the run. By cutting out the series…
Architecture · Building · Carpentry
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