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 8
... marked on bits of paper , or any other substance that may be light enough to rise to the electrified ball ; and at the same time let it be so continued that each of them may re- assume its proper place when dropped . All things ...
... marked on bits of paper , or any other substance that may be light enough to rise to the electrified ball ; and at the same time let it be so continued that each of them may re- assume its proper place when dropped . All things ...
Página 11
... marked + to the end marked nected with the outer coating of the jar , a spark would pass over each of the intervening spaces at the same time , and the letter would appear beautifully illuminated in the dark . This experiment of Reusser ...
... marked + to the end marked nected with the outer coating of the jar , a spark would pass over each of the intervening spaces at the same time , and the letter would appear beautifully illuminated in the dark . This experiment of Reusser ...
Página 20
... marked with letters of the alphabet , nine with numerals , and one with a zero . From each point an insulated wire was led to a metal terminal at the transmitting station . ' Galvanism , " by Sir W. S. Harris , p . 35 . To send a signal ...
... marked with letters of the alphabet , nine with numerals , and one with a zero . From each point an insulated wire was led to a metal terminal at the transmitting station . ' Galvanism , " by Sir W. S. Harris , p . 35 . To send a signal ...
Página 22
... marked with the respective letters and numerals , were insulated on a wooden support , K K. The ends of the termi- nals were furnished with holes , 1 , to receive the poles в and c of the voltaic pile P N. The construction of this ...
... marked with the respective letters and numerals , were insulated on a wooden support , K K. The ends of the termi- nals were furnished with holes , 1 , to receive the poles в and c of the voltaic pile P N. The construction of this ...
Página 26
... marked with a letter of the alphabet were adapted to the battery , so that on pressing down the key of any letter the circuit corresponding to that letter would be closed , correspondence could be carried on with ease , and would ...
... marked with a letter of the alphabet were adapted to the battery , so that on pressing down the key of any letter the circuit corresponding to that letter would be closed , correspondence could be carried on with ease , and would ...
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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...