. The Street railway journal . , ex-cept in one or two cases, were not found very suitable forunderground work, but they were extensively used on thegantries and yards at the various depots. For the electric motive power it was very wisely decidedto have the motors as far as possible all of the same size,and interchangeable. The size adopted was 30 hp andWestinghouse 4-pole type motors were put down to drivea line shaft from which the necessary hydraulic, air, wind-ing, fanning, pumping and other plants for working thedepot were driven by means of belting. Motors were run upon loose pulleys an
. The Street railway journal . , ex-cept in one or two cases, were not found very suitable forunderground work, but they were extensively used on thegantries and yards at the various depots. For the electric motive power it was very wisely decidedto have the motors as far as possible all of the same size,and interchangeable. The size adopted was 30 hp andWestinghouse 4-pole type motors were put down to drivea line shaft from which the necessary hydraulic, air, wind-ing, fanning, pumping and other plants for working thedepot were driven by means of belting. Motors were run upon loose pulleys and put on to theshafting according to the demand for power. Thus themaximum economy was attained by keeping the motors asfully loaded as possible, ment, in which was situated all the driving top floor carried a portable steam crane which couldplumb the roadway and deal with the material required inthe tunnel by lowering it down a portion of the shaft re-served for its use, and also formed the landing stage for the. Sqnare Cente liuilwuy Journal Hani Dry Filling FIG. 8.—SECTION OF TUNNEL AND STATION spoil wound from the bottom of the shaft, the cages beingsuspended from a pit-head superstructure and operated bythe winding gear situated with the other machinery in thebasement. The spoil was shot from the skips into binsserved by roads leading from the cages, and carts on theground floor were served from these bins by suitably con-trolled shoots worked by the carters as required. The depth of the shafts varied between 60 ft. and 90 ft.,and the winding was done very satisfactorily by belt-drivenLidgerwood hoists with friction gear, the cage beingwound above ordinary flap keps and then lowered awayon free barrel to rest upon them,
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
