. Engineering and Contracting. er, Wyo. T. E. Calvert,Chicago, 111., is chief engineer. 200 ENGINEERING-CONTRACTING Vol. XXXIII. No. q. A New Jaw Crusher Designed Particu-larly for Contractors Use. .A. crusher for contractors use has to ful-fill different requirements than are intendedfor general quarry use. A contractorscrusher should be of large output, remarkablylight in weight, convenient to handle and aboveall very durable. Particular attention hasbeen paid to these qualities in designing thecrusher illustrated in the accompanying notable feature of this machine is its prac- Method
. Engineering and Contracting. er, Wyo. T. E. Calvert,Chicago, 111., is chief engineer. 200 ENGINEERING-CONTRACTING Vol. XXXIII. No. q. A New Jaw Crusher Designed Particu-larly for Contractors Use. .A. crusher for contractors use has to ful-fill different requirements than are intendedfor general quarry use. A contractorscrusher should be of large output, remarkablylight in weight, convenient to handle and aboveall very durable. Particular attention hasbeen paid to these qualities in designing thecrusher illustrated in the accompanying notable feature of this machine is its prac- Method of Making a Steam Shovel Cutof Two Lifts in One Lift. BY H. MORTON STEPHENS.* During September, 1909. the E. Purcell Con-struction Co., secured from the Winston-Salem South Bound Ry. Co., a contract forthe construction of part of tJie above railroad,embracing sections 22 to 30 inclusive. Section22 is located in the town of Lexington, N. C,on the Southern Ry. The balance of the workruns south through a rolling country, and with. A New Jaw Crusher for Contractors. tically all-steel construction. The main frameor side plates are of rolled steel plates. Thelarge casting that forms the front of themachine, which part is termed the stationaryjaw, is of grey iron. The moving or swingingjaw is a steel casting. The tumbler or largelever casting is also of steel. The fly wheelsand pedestals are of grey iron. The maincam shaft and the anti-friction roller are steelforgings. The anti-friction roller revolvesin boxes made of special bronze material. Allshafts from which castings are suspended areof steel. The cheek plates are of special har-dened steel, while the toggle seats are alsomade of special steel. This steel construction makes the machineof tremendous strength in comparison withits size. The feeding mouth is lower, in fact,than in other crushers of equal size. Thismeans that a large saving is effected in deliv-ering stone into the crusher. The crusherwill turn out from 150 to 200 t
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