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 xiv
... teeth 176. German 177. Kerckhoff's وو دو " " وو 99 و , " " 99 178. Automatic Guards of Tesse and Picco 179. Bianchi's Vacuum Guard · 267 . 268 268 269 269 · 271 272 . 273 273 THE ELECTRIC TELEGRAPH . SKETCH OF THE HISTORY AND PROGRESS ...
... teeth 176. German 177. Kerckhoff's وو دو " " وو 99 و , " " 99 178. Automatic Guards of Tesse and Picco 179. Bianchi's Vacuum Guard · 267 . 268 268 269 269 · 271 272 . 273 273 THE ELECTRIC TELEGRAPH . SKETCH OF THE HISTORY AND PROGRESS ...
Página 51
... teeth of this wheel , to the number of fifteen , were so arranged that the teeth and the spaces in rotation represented thirty letters of the alphabet , numerals , & c . On each side of the wheel was a spring contact , only one of which ...
... teeth of this wheel , to the number of fifteen , were so arranged that the teeth and the spaces in rotation represented thirty letters of the alphabet , numerals , & c . On each side of the wheel was a spring contact , only one of which ...
Página 53
... teeth of the wheel w were in relation to those of the pinion D , so that one complete revolution of w would cause D to revolve half as many times as there were letters , numerals , & c . , engraved on the corresponding dials of the ...
... teeth of the wheel w were in relation to those of the pinion D , so that one complete revolution of w would cause D to revolve half as many times as there were letters , numerals , & c . , engraved on the corresponding dials of the ...
Página 95
... teeth of a wheel attached to the drum , R , which is turned by the paper strip in passing . This form of Morse apparatus allows the signals to be read off as they are given , thereby enabling the clerk at the receiving station to stop ...
... teeth of a wheel attached to the drum , R , which is turned by the paper strip in passing . This form of Morse apparatus allows the signals to be read off as they are given , thereby enabling the clerk at the receiving station to stop ...
Página 152
... teeth of a series of metal types drawn under the lever by the same mechanism which is used to turn the coil . Line M A M1 Fig . 73 . www.byers ad its point , L , is lifted up , the. Fig . 78 represents a plan of the complete apparatus ...
... teeth of a series of metal types drawn under the lever by the same mechanism which is used to turn the coil . Line M A M1 Fig . 73 . www.byers ad its point , L , is lifted up , the. Fig . 78 represents a plan of the complete apparatus ...
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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...