. The railroad and engineering journal . The interior shaft or well in the center of the piers hada rectangular section of x m. ( x ft.),the corners being rounded. This central shaft left roomfor the cage and for tlie wooden ladder provided in case ofaccident, as noted above. The highest pier is shown infigs. 3, 4. 5, and 6 lifig. 3 being a^section of the pier, an elevation,[fig.■_5 a cross-sectionjust_under_the_cap, and discharged upon the platform, the wagons being at oncereturned. The hoist served also for carrying the work-men up and down, but for use in case of ac
. The railroad and engineering journal . The interior shaft or well in the center of the piers hada rectangular section of x m. ( x ft.),the corners being rounded. This central shaft left roomfor the cage and for tlie wooden ladder provided in case ofaccident, as noted above. The highest pier is shown infigs. 3, 4. 5, and 6 lifig. 3 being a^section of the pier, an elevation,[fig.■_5 a cross-sectionjust_under_the_cap, and discharged upon the platform, the wagons being at oncereturned. The hoist served also for carrying the work-men up and down, but for use in case of accident awooden ladder was also built up. The cage was providedwith safety brakes or clutches, which would at once stopit in case of the breaking of the rope. These safety brakeswere automatic, and in case of their failure to work an ad-ditional^brakeTwasyprovided, which could be worked by. fig. 6 a plan. The other piers were of the same construc-tion in all respects, differing only in height. The platform at the top, upon which the workmen andmaterial were carried, was a light frame of iron, made insections for convenience of carriage, and held together bybolts. It rested upon the masonry of the pier by means offour feet, each foot consisting of a pair of hydraulic jackshaving a lift of one meter, so that the platform could al-ways be kept level. This platform or false-work is shownin figs. 14 and 15, fig. 14 being an elevation and fig. 15 aplan. It will be seen that by the aid of these jacks the
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectrailroa, bookyear1887
