Engineering and Contracting . int to a scale 1 in. = 200 ft. The ratio of en-largement, R, is 237^-200 = The length of thelink, 1, is 20 in., perhaps. Then the distance of the holefrom the end, for two links, is x = 20 -^ = for the other two links it is 20 in. — in. = The approximate location can be determined for eachlink by inspection, by noting the ratios for the holes al-ready provided, and the proper distance to use at oncedetermined. A NEW SELF-PROPELLINGEXCAVATOR. DRAG LINE A drag line excavator self-propelling, either on broadfaced traction wheel
Engineering and Contracting . int to a scale 1 in. = 200 ft. The ratio of en-largement, R, is 237^-200 = The length of thelink, 1, is 20 in., perhaps. Then the distance of the holefrom the end, for two links, is x = 20 -^ = for the other two links it is 20 in. — in. = The approximate location can be determined for eachlink by inspection, by noting the ratios for the holes al-ready provided, and the proper distance to use at oncedetermined. A NEW SELF-PROPELLINGEXCAVATOR. DRAG LINE A drag line excavator self-propelling, either on broadfaced traction wheels or on Corduroy Grips, is illus-trated by the accompanying engravings. As shown byFig. 1 this excavator has a revolving frame supportinga boom and internal combustion engine, an A-frame, adrag drum, a hoisting drum, a boom topping lift drum,a tubular water cooling radiator, an air compressor, acentrifugal water circulating pump, a gasoline tank sus-pended from beneath and a compressed air tank also sus-pended from Fig. 1—View Showinu Framing and Machinery of Self-Propelling Drag Line Excavator. All machinery, including boom and A-frame, is sus-tained on two heavy girders. This upper frame rotateson the lower frame by rack and pinion and revolves onfour two-wheeled trucks, treading upon a 60-lb. rail cir-cle. Truck frame wheels and center castings are madeof annealed steel. The lower frame is of I-beam con-struction, designed for taking all the heavy strains thatare imposed upon it. The engine house consists of angle iron framing en-cased in double beamed and matched yellow pine roof is of the same material and is covered withheavy canvas. The whole is thoroughly painted. Watercirculation and force feed lubrication are entirely auto- 69 matic. The main structural dimensions and other detailsare: Length of boom, 40 ft.; capacity of bucket, 1 cu. yd.;horsepower of engine, 70; rotating speed, 2Yi revolutionsper minute; diameter of turntable, 8 ft.; charac
Size: 1821px × 1373px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookpublisherchicago, bookyear19
