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 xi
... style Apparatus . 29 Alphabetical Code 92. Morse Telegraph worked by Induction Currents 93. Magneto - induction Key 94. Intermediate Station Commutators 95. Nottebohm's Commutator 99 " " 123 125 • 129 132 • 133 • . 137 138 139 • 141 143 ...
... style Apparatus . 29 Alphabetical Code 92. Morse Telegraph worked by Induction Currents 93. Magneto - induction Key 94. Intermediate Station Commutators 95. Nottebohm's Commutator 99 " " 123 125 • 129 132 • 133 • . 137 138 139 • 141 143 ...
Página 48
... style is carried , which either marks a zigzag line or presses into a strip of paper pulled with a uniform velocity over it . 42. Morse's telegraph underwent in a few years many modi- fications , especially in the form of the electro ...
... style is carried , which either marks a zigzag line or presses into a strip of paper pulled with a uniform velocity over it . 42. Morse's telegraph underwent in a few years many modi- fications , especially in the form of the electro ...
Página 77
... . The line wire w ends in a spiral of insulated wire fastened to a style , G , with blunt platinum point and insulated handle . This apparatus is intended to replace the key . In THE ELECTRIC TELEGRAPH . 77 Morse Transmitting Plate.
... . The line wire w ends in a spiral of insulated wire fastened to a style , G , with blunt platinum point and insulated handle . This apparatus is intended to replace the key . In THE ELECTRIC TELEGRAPH . 77 Morse Transmitting Plate.
Página 78
... style in his hand , and scores the point with a uniform speed over the signs of the letters , one after the other , which he wishes to telegraph . In doing so the circuit is closed as soon as the point of the style touches any of 78 THE ...
... style in his hand , and scores the point with a uniform speed over the signs of the letters , one after the other , which he wishes to telegraph . In doing so the circuit is closed as soon as the point of the style touches any of 78 THE ...
Página 79
... style touches any of the metal pieces , and is broken again when it moves over the ivory . The arrangement has never enjoyed an entensive employ- ment , and is now , perhaps , entirely out of use . The reason of this is probably to be ...
... style touches any of the metal pieces , and is broken again when it moves over the ivory . The arrangement has never enjoyed an entensive employ- ment , and is now , perhaps , entirely out of use . The reason of this is probably to be ...
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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...