Transactions . with,and the force of gravity alone utilized. Across the lower end ofthe shoot, but at a sufficient height to admit of the free passageof the coal, are fixed two brackets carrying a shaft, at either endof which rollers are keyed, and also a brake wheel which is con-trolled by a rope from the deck. Two wire ropes passing aroundthese rollers are attached to the sides of a rectangular bucket,and at their other ends these ropes, passing over pulleys fixed * The previously described and more recent invention of Mr. Handcockseems, however, to have got over this difficulty. COAL-SHIPME
Transactions . with,and the force of gravity alone utilized. Across the lower end ofthe shoot, but at a sufficient height to admit of the free passageof the coal, are fixed two brackets carrying a shaft, at either endof which rollers are keyed, and also a brake wheel which is con-trolled by a rope from the deck. Two wire ropes passing aroundthese rollers are attached to the sides of a rectangular bucket,and at their other ends these ropes, passing over pulleys fixed * The previously described and more recent invention of Mr. Handcockseems, however, to have got over this difficulty. COAL-SHIPMEXT AND THE LAYIXG-OUT OF STAITHE HEADS 237 above the staithe framing, are connected to counterbalance-weights, which preponderate over the empty bucket; the reversebeing the case when the bucket is loaded. The counterbalance-weights may be led, by means of guide pulleys, to any convenientout-of-the-way position on the staging. It will thus be seen thatthe man on deck operating the brake can easilv determine the. Fig. 63.—Rigg Anti-breakage Appliances: Doors released fromDeck by Cord. depth in the hold to which the bucket shall descend, and he cansimilarly control the pace at which the counterbalance-weightsshall cause the empty bucket to return to the end of the shoot. (2) Door Released by Contact.—Fig. 64 illustrates the bucketin use under this patent. The bucket is also suspended from theend of the shoot by two ropes and counterbalanced, as in Fig. 63, 238 COAL-SHIPMENT AND THE LAYIXG-OUT OF STAITHE HEADS.
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Keywords: ., bookcentury1800, booksubjectmechan, booksubjectmineralindustries
