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
... Spring 109 81. Complete Submarine Board 110 · 82. Morse Apparatus worked by closed Circuit 113 83. Method of Translation between a Line with closed and one with open Circuit 115 • 84. Method of Translation between two Lines with closed ...
... Spring 109 81. Complete Submarine Board 110 · 82. Morse Apparatus worked by closed Circuit 113 83. Method of Translation between a Line with closed and one with open Circuit 115 • 84. Method of Translation between two Lines with closed ...
Página 8
... spring and stiffness to recover its situation after having been brought in contact with the barrel . Close by the supporting glass let a ball be suspended from every wire ; and about a sixth or an eighth of an inch below the balls place ...
... spring and stiffness to recover its situation after having been brought in contact with the barrel . Close by the supporting glass let a ball be suspended from every wire ; and about a sixth or an eighth of an inch below the balls place ...
Página 9
... spring and slider , or twenty other methods , which the least ingenuity will discover . In this way the characters will always adhere to the balls , excepting when any one of the secondaries is removed from contact with its horizontal ...
... spring and slider , or twenty other methods , which the least ingenuity will discover . In this way the characters will always adhere to the balls , excepting when any one of the secondaries is removed from contact with its horizontal ...
Página 39
... springs of his commutator to make contact with the lines only at the moment when the induced current was at its maximum . Fig . 15 represents the contact plate to which the leading wires from the receiving station were connected . The ...
... springs of his commutator to make contact with the lines only at the moment when the induced current was at its maximum . Fig . 15 represents the contact plate to which the leading wires from the receiving station were connected . The ...
Página 45
... springs - 6 , 1 , 2 , 3 , 4 , 5 - each of which was provided with two buttons with contacts working downwards upon two parallel metal strips , P and N , to which the poles of a voltaic battery were connected . With this arrangement ...
... springs - 6 , 1 , 2 , 3 , 4 , 5 - each of which was provided with two buttons with contacts working downwards upon two parallel metal strips , P and N , to which the poles of a voltaic battery were connected . With this arrangement ...
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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...