. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . s. diameter, madeof best quality crane chain, one end ofwhich is securely attached to thegrooved chain barrel, then passes overpulley at point of jib, under pulley inlifting block, and is fastened to shackleat point of jib by a hook, which mayalso be used for two speeds of lifting bysingle strand of chain for lighter derricking is worked by wormgear, the angle of the thread which isself-locking, so that it is impossible forthe jib to run down. The slewing isworked by bevel and spur
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . s. diameter, madeof best quality crane chain, one end ofwhich is securely attached to thegrooved chain barrel, then passes overpulley at point of jib, under pulley inlifting block, and is fastened to shackleat point of jib by a hook, which mayalso be used for two speeds of lifting bysingle strand of chain for lighter derricking is worked by wormgear, the angle of the thread which isself-locking, so that it is impossible forthe jib to run down. The slewing isworked by bevel and spur gear, drivinga pinion gearing into the slewing motion is fitted with a brake tocontrol the slewing. The self-propell-ing is worked from the second motionshaft, by bevel gear driving a piniongearing into an intermediate wheel con-centric with the center post. All tliegears, axles and shafts are of steel, andthe bearings are made of gunmetal. The leading dimensions of this ma-chine are as follows: Maximum radius with full load, 21 ft.; heightto centre of jib head pulley at 21 ft.; gauge of. i;ki:.\kdo\vx or wreckixg crane on the curves smoothly and without the four traveling wheels, brakesare fitted, operated by a hand-wheelfrom the side of the carriage, and arelieving gear is also fitted so that theweight of the boiler and balance weightmay be taken ofif the center post whenthe crane is not working. The revolv-ing superstructure is placed on twoheavy steel beams, carrying a heavysteel center, fitted with rollers whichrevolve on the steel path on the under-carriage, and horizontal rollers, whichrevolve round the center post. There is a platform placed betweenthe boiler and the crane, from whichthe operator can control all the move-iTients of the crane, and convenientlyattend to the boiler. All the motionsfor hoisting, slewing derricking andpropelling, are worked by a pair ofhigh pressure reversing engines 8 , by 14 ins. stroke carri
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Keywords: ., bookcentury1900, bookdecade1900, bookidrailwaylocom, bookyear1901
