The History and Progress of the Electric Telegraph: With Descriptions of Some of the ApparatusD. Van Nostrand, 1869 - 280 páginas |
Dentro del libro
Resultados 1-5 de 28
Página xiii
... 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 and 1866 Atlantic Cables . 157. Submersion of Cables 158. Taking Bearings ...
... 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 and 1866 Atlantic Cables . 157. Submersion of Cables 158. Taking Bearings ...
Página 9
... cable , so as to be in contact with the horizontal ones ; and let it be so contrived at the same time , that any of them may be removed from its corresponding horizontal by the slightest touch , and may bring itself again into contact ...
... cable , so as to be in contact with the horizontal ones ; and let it be so contrived at the same time , that any of them may be removed from its corresponding horizontal by the slightest touch , and may bring itself again into contact ...
Página 22
... cable . Sömmering proposed to call the attention of the receiving station by liberating an alarm by means of accumulated gas . Fig . 7 , a copy of that given by Sömmering in his descrip- tion of this telegraph will illustrate the ...
... cable . Sömmering proposed to call the attention of the receiving station by liberating an alarm by means of accumulated gas . Fig . 7 , a copy of that given by Sömmering in his descrip- tion of this telegraph will illustrate the ...
Página 57
... . 52. Professor Sir William Thomson's reflecting galvano- meter , as used to receive signals through the Atlantic cables , forms the most recent and novel construction of single- needle D3 THE ELECTRIC TELEGRAPH . 57.
... . 52. Professor Sir William Thomson's reflecting galvano- meter , as used to receive signals through the Atlantic cables , forms the most recent and novel construction of single- needle D3 THE ELECTRIC TELEGRAPH . 57.
Página 68
... cable to a Leyden jar of very great surface , the interior coating being formed by the metal conductor , the dielectric by the gutta - percha or other insulator , and the outer coating by the metallic covering , or by the dampness ...
... cable to a Leyden jar of very great surface , the interior coating being formed by the metal conductor , the dielectric by the gutta - percha or other insulator , and the outer coating by the metallic covering , or by the dampness ...
Contenido
1 | |
2 | |
5 | |
6 | |
7 | |
8 | |
9 | |
10 | |
11 | |
12 | |
14 | |
15 | |
18 | |
19 | |
20 | |
23 | |
25 | |
31 | |
37 | |
43 | |
61 | |
91 | |
101 | |
106 | |
145 | |
147 | |
156 | |
162 | |
171 | |
172 | |
178 | |
202 | |
208 | |
222 | |
223 | |
231 | |
263 | |
273 | |
275 | |
278 | |
Otras ediciones - Ver todas
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...