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 42
... indicator was in circuit with one station , the wire of the other should be connected to the multiplier of the receiving instrument . The receiving instrument was not used exclusively to record the messages on the paper strips ...
... indicator was in circuit with one station , the wire of the other should be connected to the multiplier of the receiving instrument . The receiving instrument was not used exclusively to record the messages on the paper strips ...
Página 52
... indicator . This was a material step in the right direction , and fulfilled the first condition of a successful telegraph - that of requiring only a single line wire . In the improved indicator the duties of the one electro- magnet were ...
... indicator . This was a material step in the right direction , and fulfilled the first condition of a successful telegraph - that of requiring only a single line wire . In the improved indicator the duties of the one electro- magnet were ...
Página 56
... indicator , spring ť , metal stop k , spring t , terminal т , to earth ; and the needle is deflected to the right or left , according as the arriving cur- rent is positive or negative . If signals are to be given by the apparatus , the ...
... indicator , spring ť , metal stop k , spring t , terminal т , to earth ; and the needle is deflected to the right or left , according as the arriving cur- rent is positive or negative . If signals are to be given by the apparatus , the ...
Página 133
... indicator of the magneto - electric telegraph of the same inventors , which will be described further on . The solution of this problem has placed at the command of the telegraphist a source of electricity of much greater intensity for ...
... indicator of the magneto - electric telegraph of the same inventors , which will be described further on . The solution of this problem has placed at the command of the telegraphist a source of electricity of much greater intensity for ...
Página 159
... indicator , and thence to the line . In employing a series of separate magnets , arranged at a distance from each other , a greater inductive effect is pro- duced than if only a single permanent magnet were used , or if the separate ...
... indicator , and thence to the line . In employing a series of separate magnets , arranged at a distance from each other , a greater inductive effect is pro- duced than if only a single permanent magnet were used , or if the separate ...
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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...