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 ix
... Letter of " C. M. " 12. Lesage's.Telegraph 13. Pith - ball Electroscopes 14. Lomond's Telegraph 15. Reusser's Telégraph 16. Don Silva's and Betancourt's Telegraphs . 17. Cavallo's Telegraph 18. Ronald's Telegraph . III . TELEGRAPHS BY ...
... Letter of " C. M. " 12. Lesage's.Telegraph 13. Pith - ball Electroscopes 14. Lomond's Telegraph 15. Reusser's Telégraph 16. Don Silva's and Betancourt's Telegraphs . 17. Cavallo's Telegraph 18. Ronald's Telegraph . III . TELEGRAPHS BY ...
Página 7
... letter to the editor , from a correspondent signing himself " C. M. , " to whom we must give the credit of being the first who pub- lished the idea of applying electricity to the telegraph . This interesting communication is as follows ...
... letter to the editor , from a correspondent signing himself " C. M. , " to whom we must give the credit of being the first who pub- lished the idea of applying electricity to the telegraph . This interesting communication is as follows ...
Página 8
... letters of the alphabet , be extended horizontally between two given places , parallel to one another , and each of ... letter . " The same thing may be otherwise effected . Let the balls be suspended over the characters as before , but ...
... letters of the alphabet , be extended horizontally between two given places , parallel to one another , and each of ... letter . " The same thing may be otherwise effected . Let the balls be suspended over the characters as before , but ...
Página 9
... letter at the other end of the horizontal will immediately drop from its ball . But I mention this only by way of variety . " Some may perhaps think that , although the electric fire has not been observed to diminish sensibly in its ...
... letter at the other end of the horizontal will immediately drop from its ball . But I mention this only by way of variety . " Some may perhaps think that , although the electric fire has not been observed to diminish sensibly in its ...
Página 10
... letters of the alphabet . In this way any letter could be indicated by bringing to the end of the wire a source of static electricity produced by friction , which would immediately cause the divergence of the pith balls of its ...
... letters of the alphabet . In this way any letter could be indicated by bringing to the end of the wire a source of static electricity produced by friction , which would immediately cause the divergence of the pith balls of its ...
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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...