Show wa ego rouble double drum t corli corlia r hoiting hoi ting Eni engine edineo neo E accompanying illustration represents the new double drum corliss hoisting engine built by the sullivan machinery co of chicago which 1 is now being installed and will soon be in op operation aeration at the savoy sibley shaft of the oliver iron mining companas comp anys pys mines near ely minn this plant presents a striking appearance occupying a floor space of feet feel and being of very powerful and heavy design complete in everarde every detail its total weight is tons it depre the most advanced type in hoisting ma chinery for the iron mines of michigan and minnesota and is thoroughly modern in construction st the hoist is of the double drum direct acting type the drums being loose on the engine shaft and driven with awitin band and friction clutches two hoisting shafts are oper abed by the hoist each drum hoisting in balance from the two compartments part ments of one shaft the drums are ten feet feel in diame e ter with nine foot winding faces provided with spiral grooves lor jor one and three eighths inch rope the gross load which each drum is capable of lifting is pounds and seven tons of ore will be raised at each trip each drum is provided with two very heavy band or strap brakes ca rc ca 31 F T i L 4 ank 5 which operate simultaneously the powerful band friction clutches are located at the centers of tho the drums the drum shafts are 36 feet long by 14 inches in diameter supported by three bearings there are two auxiliary rope reels located inside each main drum for tak taking ingup up the slack of the hoisting ropes the engines are of the corliss pattern girder frame steam jacketed throughout when operating condensing the boiler pre pressure sure is pounds this is however in creased to pounds in case of accident to the condensing apparatus the maximum hoisting speed is 2000 feet per minute controlled by a quick acting governor in connect tion with the corliss valve gear the engine reverse gear is of the steam actuated spiral type the brakes and clutches are also operated by steam and the brake engines clutch 9 14 engines and reverse engine are provided with oil cataract cylinders the object being ito prevent sudden or jerky movements of the various parts in addition to the main steam brakes above mentioned there are two sets of auxiliary brakes one set being operated b by com compressed air and the other by a hand wheel I 1 ti on the engineers platform A special feature of the brake gear is the automatic pressure valve which will automatically substitute air for steam or steam case of either operating medium the machine is fully equipped with all modern safety appliances these include positively actuated stops to prevent over winding dial indicators to show the position of the cages in the shafts and automatically operated throttle valves for shutting off steam near the end of the hoist there is also a small auxiliary throttle valve for controlling the engines after af ter the main throttle has been automatically closed this is operated by a step on the engineers gi platform each corliss cylinder is provided with two by pass valves for connecting the two sides of the pistons when lowering the engineers platform is raised above i the floor and all hand levers and safety appliances are within easy reach of the operator A hoist of similar type with but one foot drum is operating im on the pioneer A shaft shaf t near by the sullivan machinery company also manufacture flat rope reel hoists conical drum hoists and winding engines and haulage plants for all classes of work A letter to the company at adams street chicago 71 broadway broad way new york or street denver colo will bring special cata bogues and complete information |