. Ingegnere americano e giornale ferroviario. Si lancia e armaturebeedings, e che areclosed quando il paranco è inoperativo. È così disposto neltelaio del paranco da fissare il baricentro di allow egrande rigiditj. La bobina di campo del motore e l'avvolgimento dell'arma rivestita in ferro sono ricoperti con una composizione speciale impermeabile. Gli alberi di verricello sono in acciaio di grande diametro, per ovviare alla possibilità di piegarsi sotto carichi pesanti. Le teste del verricello sono calettate sugli alberi su boccole in bronzo, e ildifficoltà che la ruggine potrebbe creare. Ogni verricello è dotato di due nottolini di sicurezza che,

• Collaboratore: Reading Room 2020 / Alamy Foto Stock
• ID dell’immagine: 2CRENRP
• Dimensioni dei file: 7,1 MB (285,8 KB Download compresso)
• Liberatorie: Modello - no | Proprietà - no
• Dimensioni: 1654 x 1510 px | 28 x 25,6 cm | 11 x 10,1 inches | 150dpi

Altre informazioni

Questa immagine potrebbe avere delle imperfezioni perché è storica o di reportage.

. 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 composition.The 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 mois-ture.. 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, S.OOO 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 in.Overall dimensions of hoist are as follows : Length, 6 ft. 10in.; width, (i ft. 7 in.; height with wheel.s, 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 *■ (EST.i-BLISnED IN 1833.) THE OLDEST RAILROAD PAPER IN THE WORLD. The American Railroad Journal^ founded in

Parole chiave associate all'immagine

• bookcentury1800
• bookdecade1890
• booksubjectrailroadengineering