. Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics . articulated, is in-troduced into a round or squareguide-way, in which it runs easi-ly, and follows all sinuosities aswell as if it were a chain workedby traction. By fixing a link ofthis chain to the floor of an or-dinary elevator-cage, and impel-ling the flexible chain by meansof a suitable wheel, driven byany motive-power whatever situ-ated at the bottom of the eleva-tor, it is easy to see that thechain will follo
. Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics . articulated, is in-troduced into a round or squareguide-way, in which it runs easi-ly, and follows all sinuosities aswell as if it were a chain workedby traction. By fixing a link ofthis chain to the floor of an or-dinary elevator-cage, and impel-ling the flexible chain by meansof a suitable wheel, driven byany motive-power whatever situ-ated at the bottom of the eleva-tor, it is easy to see that thechain will follow the cage wher-ever its guides will permit it torun. By joining the two ex-tremities of the flexible chain, itforms an endless chani of rodsmoving over two encaged lower wheel applies thepower, and the upper one actsas a simple pulley-wheel to ena-ble the chain to circulate. The Otis elevator is of thehydraulic type described else-where, the power being derivedfrom a hydraulic cylinder 36 , having a 38-in. piston withtwo 4|-in. rods, the upper endsof which are fastened to a truckY carrying six grooved pulleys5 ft. indiameter. The hydraulic 250 cylinder is single-acting, water being admitted to the top only. The cabin, truck, and safetyai)i)liances make up a weight of lbs. ?, , , . ^, The Edoux elevator has a pair of cabins working vertically and balancmg one another. The hydraulic cylinder is verti-cal, and about 2;J0 ft. long. Theupper cabin is carried on twohydraulic rains. For full details of the EiffelTower elevators see Proc. Inst,of Mech. Eng., July 2, 1889. Electric Elevator.—The elec-tric elevator, as made by OtisBrothers & Co., sinijily consistsin the application of an electricmotor to the oft lie apparatus. The motor is soarranged as to stiirt and stopwith a gradual movement, andto consume power only in pro-portion to the load. The con-struction is clearly shown inFig. 10. III. Grain Elevators.—The elevator know
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Keywords: ., bookcentury1800, bookdecade189, booksubjectmechanicalengineering
