. The street railway review . owe, Cal., with its auxiliary electric motor, theincline planes of Cincinnati, Pittsburg and Alleghenyand the hydraulic hoisting devices on the inclines at Mar-seilles and in Switzerland. Upon consideration, how-ever, it was decided that none so far constructed satis- bar the two grips are fastened, one at the top on onetrack and one at the bottom of the grade on the othertrack so that they can not become detached and yet arefree to roll along on the guide bars. This feature issecured by the use, on one side of the grip shank, of 8double flagged steel wheels, 4 ab
. The street railway review . owe, Cal., with its auxiliary electric motor, theincline planes of Cincinnati, Pittsburg and Alleghenyand the hydraulic hoisting devices on the inclines at Mar-seilles and in Switzerland. Upon consideration, how-ever, it was decided that none so far constructed satis- bar the two grips are fastened, one at the top on onetrack and one at the bottom of the grade on the othertrack so that they can not become detached and yet arefree to roll along on the guide bars. This feature issecured by the use, on one side of the grip shank, of 8double flagged steel wheels, 4 above the guide bar and 4 52() (^IJicetff^ulw^J^yW* below, thus holding the bar between the two channelsformed by the wheel flanges. These grips are of steelan inch in thickness and about 3 feet long. The shankprojects above the slot rails far enough to allow fasten-ings to be made to it for attaching to the cars. Theguide bar keeps it projecting this same amount the wholelencrth of the grade. Below, the grip is attached to the. cable by clamps 3 feet long and held by 12 g-inch boltsthus giving a fastening equal to the strength of the is made at each end of the grade for droppingthe grip below the level of the roadway into the cable is of crucible steel i yi, inch in thickness andhas a breaking strain of 62 tons. As the heaviest loadit can ever be expected to bear will be two cars weighing7 tons each and as the grade is per cent the actualstrain will be but 33/3 tons. In other words we have afactor of safety of nearly iS, whereas from 5 to 7 is con-sidered ample allowance. At the top of the grade in awheel pit are located two cast iron sheaves, one 10 feetin diameter, serving as an idler for the other, a 11^ feetdouble clip sheave equipped besides with a flange forclamping on an immense circular wood lined band construction here is designed to prevent slippageand to provide a means for stopping the whole systemindependently of the cars. At t
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Keywords: ., book, bookcentury1800, bookdecade1890, booksubjectstreetrailroads
