. American engineer and railroad journal . ushes and armaturebearings, and which areclosed when the hoist is inoperation. It is so set in thehoist frame as to secure alow center of gravity andgreat rigiditj. The fieldcoil of the motor and wind-ing of the iron-clad arma-ture are covered with specialwater-proof winch-shafts are of large diameter steel roil, to obviatethe possibility of bending under heavy loads. The winch-heads are keyed to the shafts over bronze bushings, and thedifficulties which rust might create forestalled. Each winchis provided with two safety pawls, which,
. American engineer and railroad journal . ushes and armaturebearings, and which areclosed when the hoist is inoperation. It is so set in thehoist frame as to secure alow center of gravity andgreat rigiditj. The fieldcoil of the motor and wind-ing of the iron-clad arma-ture are covered with specialwater-proof winch-shafts are of large diameter steel roil, to obviatethe possibility of bending under heavy loads. The winch-heads are keyed to the shafts over bronze bushings, and thedifficulties which rust might create forestalled. Each winchis provided with two safety pawls, which, when the hoist isin operation, are held out of action by centrifugal force, butwhich immediately catch into notches provided in the bearingcap, if the current fail while a load is being hoisted. Thisprevents overhauling of the hoist by the load, which mightotherwise happen with disastrous results. The apparatiis forcontrolling the hoist is placed below the motor within theframe, where it is protected from mechanical injury and FODR-wiNcn uorsT. The particulars and dimensions of this hoist are lus follows : Four winch hoist, class (iO-2r)0. volts 110 (220) (.500). Net horse powiT of hoist at winches, 4.)0 II. P.; normalspeed of motor, 42.) revolutions ; voltage of motor, accordingto order, .)1MI volis ; current at 110 volts, :!00 amperes; totalweight of hoist, comiilete, lbs. Lifting capacity of hoist, two weights simultaneously, 3,000lbs ; speed of lifting, 2.)0 per minute ; diameter of winch-heads, 12 in.; length of winding space on winch-heads, 9i dimensions of hoist are as follows : Length, 6 ft. 10in.; width, (i ft. 7 in.; height with , 4 ft. 7J in.; heightwithout wheels, 4 ft. 51 in. Vol. LXVII, No. 7.] AND RAILROAD JOURNAL. 309 ^AMERICAN—. LNcmEER RAILROAD ^JOURNAL ^-♦-^ Formerly the RAILROAD AND ENGINEERING JOURNAL -»t *■ ( IN 1833.) THE OLDEST RAILROAD PAPER IN THE WORLD. The American Railroad Journal^ founded in
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
