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 5
... shown in Fig . 1 , in which a a is a coating of tinfoil upon the outer surface of a glass jar , b b an inner coating of the same material , and c a knob attached to a wire in connection with the inner coating . On charging the knob and ...
... shown in Fig . 1 , in which a a is a coating of tinfoil upon the outer surface of a glass jar , b b an inner coating of the same material , and c a knob attached to a wire in connection with the inner coating . On charging the knob and ...
Página 6
... shown in the figure , the opposite electricity accumulated on the coatings of the jar will rush towards each other through the conductor , producing , on its approach to complete com- munication , a spark of brilliant light . Suppose ...
... shown in the figure , the opposite electricity accumulated on the coatings of the jar will rush towards each other through the conductor , producing , on its approach to complete com- munication , a spark of brilliant light . Suppose ...
Página 10
... shown in equilibrium at a , Fig . 2 , Fig . 2 . the two pith balls , having the same kind of electricity , would repel each other , and assume a position similar to that shown at b in the same figure . This would continue as long as the ...
... shown in equilibrium at a , Fig . 2 , Fig . 2 . the two pith balls , having the same kind of electricity , would repel each other , and assume a position similar to that shown at b in the same figure . This would continue as long as the ...
Página 11
... shown in Fig . 3. An electric discharge from the interior coating of a Fig . 3 . ― con- Leyden jar being sent , for instance , through the double strips of tinfoil , from the end marked + to the end marked nected with the outer coating ...
... shown in Fig . 3. An electric discharge from the interior coating of a Fig . 3 . ― con- Leyden jar being sent , for instance , through the double strips of tinfoil , from the end marked + to the end marked nected with the outer coating ...
Página 25
... shown in Fig . 9 . It has since become one of the most essential instruments for the measurement and indication of galvanic electricity . 29. The brilliant discovery of electro - magnetism was speedily followed by attempts to employ it ...
... shown in Fig . 9 . It has since become one of the most essential instruments for the measurement and indication of galvanic electricity . 29. The brilliant discovery of electro - magnetism was speedily followed by attempts to employ it ...
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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...