Submarine Telegraphs: Their History, Construction, and Working. Founded in Part on Wünschendorff's 'Traité de Télegraphie Sous-marine' and Compiled from Authoritative and Exclusive Sources

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C. Lockwood and son, 1898 - Cables, Submarine - 744 pages
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Page 504 - The lay of the stranded conductor shall be lefthanded. 2. Insulator or Dielectric. — The conductor of each coil shall be insulated by being covered with three alternate layers of Chatterton's compound and gutta-percha, beginning with a layer of the said compound, and no more compound shall be used than may . be necessary to secure adhesion between the conductor and the layers of gutta-percha. The dielectric on the conductor of each coil shall weigh not less than 300 Ibs. per knot, making the total...
Page 180 - Or the great grey level plains of ooze where the shell-burred cables creep. Here in the womb of the world — here on the tieribs of earth Words, and the words of men, flicker and flutter and beat — Warning, sorrow and gain, salutation and mirth — For a Power troubles the Still that has neither voice nor feet.
Page 680 - The tube is exhausted to a vacuum of 4 mm., and sealed. It forms part of a circuit containing a local cell and a sensitive telegraph relay. In its normal condition the metallic powder is virtually an insulator. The particles lie higgledy-piggledy, anyhow in disorder.
Page 94 - I have much pleasure in speaking to you through the 1865 cable. Just going to make splice.
Page 180 - The wrecks dissolve above us; their dust drops down from afar — Down to the dark, to the utter dark, where the blind white sea-snakes are.
Page 30 - ... and a splice of large dimensions passing over them. This was rectified by fixing additional guards and softening the tar with oil. "It was necessary to bring up the ship, holding the cable by stoppers until it was again properly disposed around the pulleys.
Page 18 - By this means the latter or retarded portion of each current was blotted out, as it were, by the opposite current immediately following ; and thus a series of electric waves could be made to traverse the wire one after the other — several being in the act of passing onward at different points along the conductor .at the same time.
Page 679 - D d, and the frequency of oscillation is probably about 250 millions per second. The distance at which effects are produced with such rapid oscillations depends chiefly on the energy in the discharge that passes. A...
Page 679 - Marconi uses generally waves of about 120 centimeters long. Two small spheres, a and b, are fixed close to the large spheres, and connected each to one end of the secondary circuit of the "induction coil" C, the primary circuit of which is excited by a battery E, thrown in and out of circuit by the Morse key K. Now, whenever the key K is depressed sparks pass between 1, 2, and 3, and since the system AB contains capacity and electric inertia, oscillations are set up in it of extreme rapidity. The...
Page 505 - If, after the examination of any parcel of wire, five per cent, of such parcel fail to meet all or any of the requirements of this specification, and of the Table, the whole of such parcel shall be rejected, and on no account shall such parcel or any part thereof be again presented for examination and testing ; and this stipulation shall be deemed to be, and shall be treated as, an essential condition of the contract. (8) Each piece when approved by the Inspecting Officer shall be made into a coil...

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