. The Artizan. inding drum 1 fixed to the Opportl of the girder, on the lighter The winding dram I li worked by a two cylinder engine ; the boiler i* in the lighter, which Contains also tho water tanks and coal bnnkors; and as tinengine itself is fixed to the girders the stoam pipe passes tinthe universal joint uniting the girder, to the lighter. The elevator isworked in the following manner. fj the trolly It is at the lower end of the incline and consequently outside the lighter, a float is broughtunderneath, carrying boxes U U filled with ipoil by the dredger, one of which is hooked on to th
. The Artizan. inding drum 1 fixed to the Opportl of the girder, on the lighter The winding dram I li worked by a two cylinder engine ; the boiler i* in the lighter, which Contains also tho water tanks and coal bnnkors; and as tinengine itself is fixed to the girders the stoam pipe passes tinthe universal joint uniting the girder, to the lighter. The elevator isworked in the following manner. fj the trolly It is at the lower end of the incline and consequently outside the lighter, a float is broughtunderneath, carrying boxes U U filled with ipoil by the dredger, one of which is hooked on to the chain, and the engine set to work. The firsteffect is that the cable uncoils itself from the larger drum T on the axle ofthe trolly, Figs. 7 and 8, thereby winding up on the smaller drum S thechain hooked to the box U, which is thus lifted until the stop V touchesthe drum S; and as the chain cannot then be wound up any further, thecable drags the trolly up to the top of the incline, where the spoil is Pig. ^ tipped by a self-acting movement. For tipping the sp il a pair of rollersX, Fig. 7, are placed at the hack of the box V and on the lower side,which are caught between two pairs of goidiog rails V V parallel to theincline of the elevator; and shortly before getting to the top of the inclinethese guides rise in a curvilinear line, as shown in Pig, to tip the box into a nearly vertical position for emptying out the spoil. !,.the engine the trolly is allowed to run down to the bottom of the incline,and the box is lowered back again into the floal. The boxes U hold 4 cubic yards each, and their shape is similar to thatof tip wagons, as shown in Pigs. 7 and 8; the bottom is lined with thinsheet iron, and they are made somewhat narrower at the hack than infront. The flap door at the front end is hinged on the upper edge, Fig7, anil kept shut by a catch on each side, which is released by a self-actingchain at the moment of tipping tho box. The floats carry seven boxeseach; th
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Keywords: ., bookcentury1800, bookdecade1840, booksubje, booksubjecttechnology
