E/MJ : engineering and mining journal . aration AmericanSyndicate, Ltd., the petitioners, ?s. James M. ,;of Butte, Mont., indPaloi : !>i- is thehea on writ of ci rtiroi ><?;. D. D. McKenney, • n, II. Miller. 0. W. McConnell,William H. Ken Thomas F. Sheridan, George L. Wilkinson, Walter A. K. R. Babbit! and J. BKrenicr. JO© eflffic Drive at Empire Minne mill. ectric and Mann: hp. electric hoisl and ti mill with i Notewortli s, liquid rl safety d( 1 the double-drum type, made by the Wellman-Si I .... and embodi ? reduction herrin« 1 phase-wound induction motor ha to 1
E/MJ : engineering and mining journal . aration AmericanSyndicate, Ltd., the petitioners, ?s. James M. ,;of Butte, Mont., indPaloi : !>i- is thehea on writ of ci rtiroi ><?;. D. D. McKenney, • n, II. Miller. 0. W. McConnell,William H. Ken Thomas F. Sheridan, George L. Wilkinson, Walter A. K. R. Babbit! and J. BKrenicr. JO© eflffic Drive at Empire Minne mill. ectric and Mann: hp. electric hoisl and ti mill with i Notewortli s, liquid rl safety d( 1 the double-drum type, made by the Wellman-Si I .... and embodi ? reduction herrin« 1 phase-wound induction motor ha to 100, the aiotor running at a full-load speed oi Wiih two drum, this a hoisting speed of 1,200 ft. per mm. in the Bhafl when all resistance is cul oul of tl ntroller. The hoisl dt urns an 6 ft. diameter and have a i apa< ityof 8,000 ft. of rope per WESTINGHOl . THREE-PHASE VOLT, PHASE-WOUND INDUCTION MOTOR OPERAT-ING HOIST AT EMPIRE MINE, GRASS VALLEY, CALIF 1,200 ft. per min. from a, | 7,500 i i The gi ars have a 1 l-in. :in a sheet-iron case lagged to deaden the thai they cannot he heard from the Incy of theactor of a lo•urn of the Am Bn iki oisl mechanism is controlled from thi hi. all bra air. Air fimain line thai tiled, which works in paraded witli 862 ENGINEEKING AND MINING JOUENAL Vol. Hi-.*. No. 30 lias been designed so that plugging and regenerativebraking are possible. This means that when the operatorwants tii stop the skips by reversing the current in themotor while running, this will not overstrain the wind-ings or cause any electrical trouble. This feature is oneof the latesl developments in alternating-current hoislmotors. The motor is controlled by a liquid resistance in the secondary of the motor is regulatedby the height of water on the plates on the upper tankof the rheostat. The heigh
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Keywords: ., bo, bookcentury1900, bookdecade1910, booksubjectmineralindustries
