The Wire Rope and Its Applications (Google eBook)

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D.F. Tayler, 1896 - Wire rope - 92 pages
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Page 11 - 464 of an inch ; circumference of core 1'46 inches. External Protection. — Ten solid wires of diameter '095 (No. 13 gauge) drawn from Webster and Horsfall's homogeneous iron, each wire surrounded separately with five strands of Manilla yarn, saturated with a preservative compound, and the whole laid spirally round the core, which latter is padded with ordinary hemp, saturated with preservative mixture. Circumference of Finished Cable, 3*534 inches. Weight in Air, 35 cwt. 3 qrs. per nautical mile....
Page 11 - Weight in water 14cwt. per nautical mile, or equal to eleven times its weight in water per knot ; that is to say, it will bear its own weight in eleven miles depth of water. Breaking strain 7 tons 15 cwt. Deepest water to be encountered 2,400 fathoms, or less than 24 nautical miles in depth. The contract strain is equal to eleven times its weight per nautical mile in water.
Page 42 - This system is suited to mines where there are a number of side roads or workings, or where the gradients vary and the curves are frequent and of short radius. The Engine for driving is required of greater power in this system. Two drums are required which run loose upon the shaft and are put into gear alternately by means of clutches. When the "Journey...
Page 42 - Instead of the tubs being placed at regular intervals apart, as in the endless-rope system, they are placed in a " set " or " journey" of from 25 to 100 tubs connected closely together and run in and out at speeds of from 12 to 20 or more miles per hour, a man riding with the " journey
Page 41 - Rope is the most effective and at the same time the most economical method of transmitting power.
Page 10 - Cable, 1858. Conductor. — A copper strand, consisting of seven wires (six laid round one), and weighing 107 Ibs. per nautical mile. Insulator. — Gutta percha laid on in three coverings, and weighing 261 Ibs. per knot. External Protection. — Eighteen strands of charcoal iron wire, each strand composed of seven wires (six laid round one), laid spirally round the core, which latter was previously padded...
Page 11 - Diameter of single wire -048 = ordinary 18 gauge. Gauge of strand -144 = ordinary No. 10 gauge. Insulation. — Gutta percha, four layers of which are laid on alternately with four thin layers of Chatterton's compound. The weight of the entire insulation 400 Ibs. per nautical mile. Diameter of core *464 of an inch ; circumference of core 1'46 inches.
Page 42 - These will run for a long time without being looked after. An arrangement is sometimes adopted which obviates the use of carrying pulleys, in which the rope is carried on the top of the trams in a suitable grip, see Fig.
Page 47 - ... inch diameter is required to bend to sharp angles or wind on a small drum, this advantage must be sacrificed in favour of greater flexibility by increasing the number of wires per strand. A point of the greatest importance in haulage ropes, and strangely neglected by manufacturers, is the ratio of the length of lay of wires and strands to the diameter of the drum on which the rope is expected to work.
Page 6 - Ropes: — •'The Duke believes that the first invention of suspension bridges was by the "engineers of his army in Spain at Trajan's Bridge of Alcantara. Necessity was in this "case, as in many others, the parent of...

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