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 13
... receiving station what letters to note down as they appeared before him in succession on the dial of the clock . This was accomplished in the following manner . transmitter caused a current of electricity to be constantly operating upon ...
... receiving station what letters to note down as they appeared before him in succession on the dial of the clock . This was accomplished in the following manner . transmitter caused a current of electricity to be constantly operating upon ...
Página 21
... receiving station , where it passed between the gold points corresponding to the terminals touched by the poles , and returned through the other line wire to the terminal of the other pole of the pile . In doing this , bubbles of ...
... receiving station , where it passed between the gold points corresponding to the terminals touched by the poles , and returned through the other line wire to the terminal of the other pole of the pile . In doing this , bubbles of ...
Página 22
... 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 foregoing . A A is a sectional view of the glass reservoir ...
... 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 foregoing . A A is a sectional view of the glass reservoir ...
Página 34
... receiving instrument ; and 3. The commutator , or instrument for reversing the currents . The arrangements used by Gauss and Weber for the production of magneto - electric currents at the transmitting station consisted of two or three ...
... receiving instrument ; and 3. The commutator , or instrument for reversing the currents . The arrangements used by Gauss and Weber for the production of magneto - electric currents at the transmitting station consisted of two or three ...
Página 35
... inductor .グル ገ R Fig.13 . The receiving instrument placed at the distant station is represented in Fig . 13. It consists of a large THE ELECTRIC TELEGRAPH . 35 Steinheil's Telegraph Morse's Invention of an Electro- 99.
... inductor .グル ገ R Fig.13 . The receiving instrument placed at the distant station is represented in Fig . 13. It consists of a large THE ELECTRIC TELEGRAPH . 35 Steinheil's Telegraph Morse's Invention of an Electro- 99.
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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...