The History and Progress of the Electric Telegraph: With Descriptions of Some of the ApparatusD. Van Nostrand, 1869 - 280 páginas |
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Página x
... Earth Circuit Local Circuit System • 38 42 37. Cooke and Wheatstone's Needle Telegraph 38. Wheatstone's Alarm 40. Fallacies about the Invention of the " Electric Telegraph 41. Practical Application of Morse's Telegraph 42. Modifications ...
... Earth Circuit Local Circuit System • 38 42 37. Cooke and Wheatstone's Needle Telegraph 38. Wheatstone's Alarm 40. Fallacies about the Invention of the " Electric Telegraph 41. Practical Application of Morse's Telegraph 42. Modifications ...
Página xiii
... Earth - plate VII . SUBMARINE TELEGRAPH LINES . $ 149 . Dover - Calais Cable 150. First Atlantic 99 151. Red Sea 22 152. Malta - Alexandria Cable 153. Persian Gulf 154. Carthagena - Oran 22 155. Protection of Outer Covering 156. 1865 ...
... Earth - plate VII . SUBMARINE TELEGRAPH LINES . $ 149 . Dover - Calais Cable 150. First Atlantic 99 151. Red Sea 22 152. Malta - Alexandria Cable 153. Persian Gulf 154. Carthagena - Oran 22 155. Protection of Outer Covering 156. 1865 ...
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... earth , decomposes it , and repels the positive ele- ment , attracting and retaining the negative element on the outer coating . If the communication between the knob and Fig . 1 . the source of electricity be broken , the charge will ...
... earth , decomposes it , and repels the positive ele- ment , attracting and retaining the negative element on the outer coating . If the communication between the knob and Fig . 1 . the source of electricity be broken , the charge will ...
Página 7
... earth , at Stoke Newington ; and on the 14th of August , in the same year , repeated his experiments on a considerably larger scale , transmitting the electric impulse through 10,600 feet of wire suspended from insulators of baked wood ...
... earth , at Stoke Newington ; and on the 14th of August , in the same year , repeated his experiments on a considerably larger scale , transmitting the electric impulse through 10,600 feet of wire suspended from insulators of baked wood ...
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... earth or any other non - electric , and from breaking by their own gravity . Let the electric gun - barrel be placed at right angles with the extremities of the wires , and about one inch below them . Also let the wires be fixed in a ...
... earth or any other non - electric , and from breaking by their own gravity . Let the electric gun - barrel be placed at right angles with the extremities of the wires , and about one inch below them . Also let the wires be fixed in a ...
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Términos y frases comunes
alphabet alternate currents armature arrangement atmospheric electricity attracted axis back contact beam bottom cable carried clockwork coils commutator connected consists construction contact-pins copper core corresponding current passes currents arriving cylinder deflected dial direction disc drum electricity electro-magnet employés galvanic galvanometer galvanoscope gutta percha hemp holes horizontal inductor inserted insulated intermediate station interrupted iron wires knot length letter lever Leyden jar lifted line battery line wire line-wire local battery means Messrs metal method mètre Morse apparatus motion needle negative current opposite paper strip permanent magnet plate pointer poles positive current posts pressed printing printing-press ratchet-wheel ratus receiving station relay resistance roller rotating round scape-wheel screw sending station shaft shown in Fig side Siemens signals soft-iron spiral spring style surface switch synchronism teeth terminal tion tongue tooth transmitting tube turning type-wheel underneath upper vertical vulcanite wheel whilst wire zinc
Pasajes populares
Página 5 - he felt himself struck in his arms, shoulders, and breast, so that he lost his breath, and was two days before he recovered from the effects of the blow and the terror.
Página 11 - ... and his wife, by remarking the corresponding motions of the ball, writes down the words they indicate: from which it appears he has formed an alphabet of motions. As the length of the wire makes no difference in the effect, a correspondence might be carried on at any distance...