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
... 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 of ...
... 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 of ...
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... Circuit 115 • 84. Method of Translation between two Lines with closed Circuit 117 85. Methods of Telegraphing in opposite Directions at the same Time in a Single Wire 86. Gintl's Method with Relays 119 • 119 87 . 99 99 by Chemical Means ...
... Circuit 115 • 84. Method of Translation between two Lines with closed Circuit 117 85. Methods of Telegraphing in opposite Directions at the same Time in a Single Wire 86. Gintl's Method with Relays 119 • 119 87 . 99 99 by Chemical Means ...
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... circuit . Volta was of opinion that the simple contact of two dissimilar metals was sufficient to develop electricity , and that the strength of the electricity excited depended upon the nature of the metals . This was vigorously ...
... circuit . Volta was of opinion that the simple contact of two dissimilar metals was sufficient to develop electricity , and that the strength of the electricity excited depended upon the nature of the metals . This was vigorously ...
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... circuit corresponding to that letter would be closed , correspondence could be carried on with ease , and would require only the time necessary to press down the keys at the one station , and to read off the letters from the deflected ...
... circuit corresponding to that letter would be closed , correspondence could be carried on with ease , and would require only the time necessary to press down the keys at the one station , and to read off the letters from the deflected ...
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... circuit was formed by a single wire . 31. In 1825 , Mr. Sturgeon , of London , discovered that when a soft iron bar is surrounded by a helix of wire , through which a galvanic current is passing , it acquires magnetism , which lasts ...
... circuit was formed by a single wire . 31. In 1825 , Mr. Sturgeon , of London , discovered that when a soft iron bar is surrounded by a helix of wire , through which a galvanic current is passing , it acquires magnetism , which lasts ...
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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...