Atlantic Telegraph Cable: Address of Professor William Thomson ...William Brown and Company, 1866 - 31 sider |
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Anglo-American Telegraph Company annum Atlantic between Ireland Atlantic Cable ATLANTIC TELEGRAPH CABLE Atlantic Telegraph Company bottom buoy-rope C. F. Varley cable on board Cent complete the line Construction and Maintenance Corsica CROMWELL F CUNARD CYRUS CYRUS W DANIEL GOOCH deep water depth Directors Ditto ditto dynamometer eastward Electric and International electric cable Electrician Estimate Expeditions of 1858 fathoms fault fluid friction forces concerned gauge GODFREY LOWELL CABOT Gutta Percha Company haul back holding grapnel insulation International Telegraph Company Ireland and Newfoundland JOHN PENDER length of cable limit the messages London Telegraph Company longitudinal friction main drum Maintenance Company Malta Messrs mile an hour miles of cable moderate weather nautical mile Newfoundland and London OLD BROAD STREET Ordinary Shares paddles perfect PROFESSOR WILLIAM THOMSON resistance Revenue River Tay rope safely screw shore speaker SUBMARINE TELEGRAPH CABLES Telegraph Company's Preference Telegraph Construction THOMAS BRASSEY velocity weight in water Willoughby Smith York
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Side 13 - ... 11. That the electrical testing can be conducted with such unerring accuracy as to enable the electricians to discover the existence of a fault immediately after its production or development, and very quickly to ascertain its position in the cable. 12. That with a steam-engine attached to the paying-out...
Side 9 - ... the cable it came up with one of its flukes caught round by its chain ; and the grapnel, the short length' of chain next it, and about 200 fathoms of the wire-rope, were proved to have been dragged along the bottom, by being found when brought on board to have interstices filled with soft light gray ooze (of which the speaker showed a specimen to the Royal Society). These results are quite in accordance with the dynamical theory indicated above (see Appendix II.), according to which a length...
Side 9 - The several plans of proceeding that have been proposed are of two classes — those in which, by three or more ships, it is proposed to bring a point of the cable to the surface without breaking it at all ; and those in which it is to be cut or broken, and a point of the cable somewhat eastward from the break is to be brought to the surface. With reference to either class, it is to be remarked that, by lifting simultaneously by several grapnels so constructed as to hold the cable without slipping...
Side 4 - Atlantic cable no longer exist. as dangers in submarine telegraphic enterprise. But the possibility of damage being done to the insulation of the electric conductor before it leaves the ship (illustrated by the occurrences which led to the temporary loss of the 1865 cable), implies a danger which can only be thoroughly guarded against by being ready at any moment to back the ship and check the egress of the cable, and to hold on for some time, or to haul back some length according to the results...
Side 13 - Atlantic cable itself, which bad been previously lifted from the bottom, have ridden out a gale. 9. That more than four nautical miles of the Atlantic cable have been recovered from a depth of over two miles, and that the insulation of the...
Side 11 - ... means of keeping the ship in proper position during the process of slowly hauling in a cable, even if it were of strength quite insufficient to act, when nearly vertical, with any sensible force on the ship, were discussed at some length. The manageability of the Great Eastern, in skilful hands, had been proved to be very much better than could have been expected, and to be sufficient for the requirements in moderate weather. She has both screw and paddles — an advantage possessed by no other...
Side 4 - Valencia on one side, and Trinity Bay, Newfoundland, on the other, regarded merely as a mechanical achievement, took by surprise some of the most celebrated engineers of the day, who had not concealed their opinion, that the Atlantic Telegraph Company had undertaken an impossible problem. As a mechanical achievement it was completely successful; and the electric failure, after several hundred messages (comprising upwards of 4359 words) had been transmitted between Valencia and Newfoundland, was owing...
Side 7 - ... outgoing part, the only thing that can be done to find whether it is just on board or just overboard, is to cut the cable as near the outgoing part as the mechanical circumstances allow to be safely done. The electric test immediately transferred to the fresh-cut seaward end shows instantly if the electric line is perfect between it and the shore.
Side 10 - Eastern has the cable, should haul up, at first cautiously, but ultimately, when the cable is got well off the bottom by the Great Eastern, the western ship should move slowly eastwards, and haul up with force enough to cut or break the cable. This leaves three miles of free cable on the western side of the Great Eastern's grapnel, which will yield freely eastwards (even if partly lying along the bottom at first), and allow the Great Eastern to haul up and work slowly eastwards, so as to keep its...