This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1911 edition. Excerpt: ... case one of the screws is driven by means of gearing. The centrifugals are driven from the engine, but the dredging chain is driven through steel spur and bevel-gearing by means of friction clutches, which slip in the case of an excessive load on the chain, and thus prevent breakage. The centrifugal ...
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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1911 edition. Excerpt: ... case one of the screws is driven by means of gearing. The centrifugals are driven from the engine, but the dredging chain is driven through steel spur and bevel-gearing by means of friction clutches, which slip in the case of an excessive load on the chain, and thus prevent breakage. The centrifugal pumps are driven direct through claw couplings on the crank-shafting, and are designed for a maximum speed of 150 revolutions per minute. They are built up of steel plates and angles, renewable plates of steel being fitted inside the casings. The latter are designed so as to admit of the interior of the pump being easily inspected. The impellers have four arms, also fitted with renewable wearing plates. The suction is long enough to allow of dredging to a depth of 32.8 ft. It is so fashioned that with the dredge steaming fully laden it can be carried entirely above the water level. The discharge pipe from the pumps is of rectangular section, and runs along almost the whole length of the hopper. It is provided with sluice openings corresponding to each section of the hopper. Six cabins are provided: one each for the engineer, the chief dredgeman, the chief mechanical engineer, and two others for the two assistants of each, while the sixth is reserved as messroom. The accommodation for the crew is sufficient for the needs of ten men. The boat is lighted electrically by means of three 1000-candlepower arc lamps, in addition to incandescent lamps in the cabins and engine rooms and stokehold. The navigating bridge is placed in front of the funnel, and is fitted with steam steering-gear engine, telegraphs, and the like. A single foremast is fitted as shown in the figure. The results obtained on the official trials, made on behalf of the Uruguayan...
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Add this copy of Dredges and Dredging to cart. $20.57, new condition, Sold by Ingram Customer Returns Center rated 5.0 out of 5 stars, ships from NV, USA, published 2022 by Legare Street Press.
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