Cyclopedia of architecture, carpentry, and building : a general reference work ... (1907)
American School of Correspondence · Chicago : American Technical Society · leaf 439
ly in theintroduction of the elec-tric elevator. To overcome thisdifficulty a very strongseries field winding isused, and this is usuallyarranged in two or threesections, and it should«jj furnish fully 30 or40 per ^i^ cent of the field excita- tion. The shunt windingis made proportional to Fig. n.… … 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…
Architecture · Building · Carpentry
Internet Archive · Public Domain Mark 1.0. Free to use for anything.
