Hydraulic, electric, steam and belt elevators. (1893)
Otis Brothers & Co. · Otis Brothers · leaf 16
the pressure produced by the generator is reduced, thus making the power requiredproportional to the work done in all instances, so that, for instance, to move a load at one-speed required but one-quarter of the power needed for full speed. The control, it will thus be seen, is effected entirely by… … OTIS COMPOUND HOISTING ENGINE The question of economy of operati n I ring be ome an important I in the u Hoisting Engines, w have perfected a Compound II- i. for u» ith E i or Com] «l Air, in which such expansion is attained as effects materia] saving in the consumption I fuel. I 2 THE OTIS…
