Fp hey SR Me ee S Benes a = a Ge see * en : + fia! Side elevation of Scow (Wolss omitted) | tein = 1 foot. 3 : &, ; 5 ae i re ' Wy ie % i - ' Seas CSU e 4 CT 31 n I 1 T 1 _ < x ' 2 3 Se eS & * tart eee % : 8 nah" teary Ou, Hi * < or" -- oi to: Pre" ¢ Po t 5 = : rss Beveled. ie ! ptt + 1 Ho-H-<* ss : roar one Ba tae 1s KOH ' L s L 1 + 1 T E, x : rte 1g! ae jG ees t mer eer: < 87x10" 32" t ' PEGE VOn ' ° rey ' ! : Heo toes eae Boe Ie of ' ' ' i 1 r t (ogres 1 . ft Pek aie. 'We ion 79 | Cott moet ' i os} : ation a7' ite ee et le et a ie ae) LA a 4. 1 Tr Tv ' . ents ek : ie es ea i e Sued aie 1 Ai | a : rol ' ee : 1 HOt wm Fay 18 . ; i va 8 ee eaten ene S heey ie x + 4 T . ' ae y \ 3 Mac vees + x t lye ones coches! <P ol ot : Lage t pas ee Sas: es ; be i nee) 6 eo pay ee ! es es a bes 0 OK tt : rat ' Hee . - 29' & :On i Ye\y vos » Oo) t ' on ' S- Wea gist o ' Paes ieat ' ' " ' eae fe 4 : re LAGS NE ef ' ' i ' yous Crete 2B ' mat ' ; att 1 i i \ 1 ' UA, ; cary . files ie ' ' 1 De See : aes : pet ; rg! ; eet pated 4 Boon wane Be apn ' ae : trod T Te ' 4 u ' i Wk ps Nd fa ! ' 11D | Wale, 42 9A, Hie Vr eitsela Ont La C ' as pe eae A Levers cad i at eg ge ees ; | | | | ee = cee da NG a eee an iano 26) OR - een a Some * cde Sues ae a! At. ~~ = -----9fg----- == -- 1 - # ~~~ ------ ~-- 9 - = -- =F" gt-- -----oK--~-----3' Sie" -------- Fig. 2. Detail of side wall at stern. / in = 1 foot. tt: made un of a system of three Howe trusses and two common framed trusses, in addition to which are two side walls and four cross trusses, con- tributing to the stiffness of the scow. The vertical tie Casting A, Hlam. Pmt! Cross-Section of cashing B. \ Aso wheels. eae Gane pace ee \\ LEO) ag a Q Casting z. Flan. ce trusses contain a turnbuckle which al- lows subsequent adjustment. Special hollow cast iron angle blocks were used in their design. A 6 in. deck of rods of the Howe - Fig, 3. Detail of side wall at bow lin. = foot heavy pieces of rock. Near its center is placed a revolving steel platform , width, 32 ft, depth, 8 ft. It is fir was laid to provide against falls of astern, are provided bringing the top- lift near the center instead of at tiie - front of the machine. The boom is St \ ARS X =e Setice et ' . ; 2 . ; soe : et RES eee Pree Ok = le = be ie mo nn tee I eS Me Ft FI i 8 en Bar ns BI = = *Fig.1. Elevation af scow tramas Nos. 1 & 2. Hin, = | foot, Bee Ai foes. r G Y.5LVG) ' * uy y S TZ, - - t yt 5 u 3 Pe & } x ui eT rn ' of + : rt i " ; Peal Ss fs : . i 8 A : = ' uP a x \ a x eet * : * 8 reas : i h 3 1 &§ j 8 i Hea ' ' ees ou Q a i ce 4 ' $ ' : recast ves a ¥. - z xX. ai 7 mannan nee se teen naan meng: Kercee ee een ne nee enn, 1S Bl-n---- - "oe sedhn ent e erence S! sine -2 =~ = ---- Neto J! 6f-- ------4y-- = ---------- 6° of ----------% fig.2. Ostail at Stern of trames Nos. 1 & 2. Fig. 3.Detail af Bow of frames Nos./ & 2. Min. = 1 foot, tin, = I foot: mounted on. sixteen conical wheels supported by a circular 60 lb. rail. All of the movable parts are securely fas- tened at the center casting to heavy cross beams inside the scow, so that the upward stresses which may occur on the center pin at times of heavy loads, are distributed directly to the top chords of the three' central trusses. The revolving platform is con- structed mainly of i0-in» 40 Ib. I beams securely riveted. To support the head of the boom a double set of A-frames, constructed of 12 in, x 12 in. fir timbers 32 ft. long, is supported and securely fastened at points near the outer edge of the revolving steel plat- form, and converges above at a point directly over the center of the plat- form. This construction differs from the usual single A-frame at the front of the platform in that guys reaching Z eee os ween ot Fig 8. Port elevation of Tooth 'W- { < ; tt =: yt Set ea at 4 | ae es Srincdmaw ra satsers slerecdaess ite Rest MEA ' Sale woul 28 # oR Hae Pee ig! sues at ae eet ate of the A pattern and is composed of two diamond trusses securely braced,