The History and Progress of the Electric Telegraph: With Descriptions of Some of the ApparatusD. Van Nostrand, 1869 - 280 páginas |
Dentro del libro
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Página xi
... Station Commutators 95. Nottebohm's Commutator 99 " " 123 125 • 129 132 • 133 • . 137 138 139 • 141 143 · 98. Commutator for Stations with three or four Lines 99. Battery Commutators . 145 · 147 ( c ) Automatic Telegraphs . 100. Morse ...
... Station Commutators 95. Nottebohm's Commutator 99 " " 123 125 • 129 132 • 133 • . 137 138 139 • 141 143 · 98. Commutator for Stations with three or four Lines 99. Battery Commutators . 145 · 147 ( c ) Automatic Telegraphs . 100. Morse ...
Página 11
... station , by firing an electric pistol by means of the spark . 16. In Spain , about the same time , Don Silva read a paper before the Academy of Sciences of Madrid , on a system of telegraphing with a single wire , by means of ...
... station , by firing an electric pistol by means of the spark . 16. In Spain , about the same time , Don Silva read a paper before the Academy of Sciences of Madrid , on a system of telegraphing with a single wire , by means of ...
Página 13
... station , by causing such motion in both those electrometers , would be able to inform the attendant at the F G Fig . 4 . The distant or receiving station what letters to note down as they appeared before him in succession on the dial ...
... station , by causing such motion in both those electrometers , would be able to inform the attendant at the F G Fig . 4 . The distant or receiving station what letters to note down as they appeared before him in succession on the dial ...
Página 14
... station . 6 D 3 2 CB DICTIONARY 1 10 AY PREPARE READY REPTBENTU 8 7 S ANNUL WORD REPYWORD FINISHED R Р 0 N Fig . 5 . Fig . 6 . Fig . 5 shows the dial ; and Fig . 6 the same with the screen before it , and the pith - ball electroscope ...
... station . 6 D 3 2 CB DICTIONARY 1 10 AY PREPARE READY REPTBENTU 8 7 S ANNUL WORD REPYWORD FINISHED R Р 0 N Fig . 5 . Fig . 6 . Fig . 5 shows the dial ; and Fig . 6 the same with the screen before it , and the pith - ball electroscope ...
Página 20
... station which was to receive signals were arranged , in a narrow vessel of water , thirty - five glass tubes , each con- taining a gold point , twenty - five marked with letters of the alphabet , nine with numerals , and one with a zero ...
... station which was to receive signals were arranged , in a narrow vessel of water , thirty - five glass tubes , each con- taining a gold point , twenty - five marked with letters of the alphabet , nine with numerals , and one with a zero ...
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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...