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 xii
... Pointer Telegraph of Siemens and Halske 156 105. Alarm used with same 161 • 106. Bréguet's Electro - magnetic Dial Instrument 107. Wheatstone's Universal Telegraph 163 169 Alarm Systems 108. Kramer's Pointer Telegraph 109 . 110 ...
... Pointer Telegraph of Siemens and Halske 156 105. Alarm used with same 161 • 106. Bréguet's Electro - magnetic Dial Instrument 107. Wheatstone's Universal Telegraph 163 169 Alarm Systems 108. Kramer's Pointer Telegraph 109 . 110 ...
Página 41
... pointers of the two printing needles . They were arranged by Steinheil as follows : - A · B · C , K D E F G H • • .. • Ch . • .. • Sch ... Ꭻ L. • M. N 0 Р Ꭱ . S T • • • • · · U , V W Z. 0 1 2 3 4 5 6 7 8 9 ... • 4 ...
... pointers of the two printing needles . They were arranged by Steinheil as follows : - A · B · C , K D E F G H • • .. • Ch . • .. • Sch ... Ꭻ L. • M. N 0 Р Ꭱ . S T • • • • · · U , V W Z. 0 1 2 3 4 5 6 7 8 9 ... • 4 ...
Página 43
... pointers attached to the axes of the magnet- needles , broken away in the middle , to show the multipliers . Each pointer was deflected from its position of rest always THE ELECTRIC TELEGRAPH . 43 Davy's Telegraph.
... pointers attached to the axes of the magnet- needles , broken away in the middle , to show the multipliers . Each pointer was deflected from its position of rest always THE ELECTRIC TELEGRAPH . 43 Davy's Telegraph.
Página 44
With Descriptions of Some of the Apparatus Robert Sabine. Each pointer was deflected from its position of rest always under the same angle on each side , so that by observing the deflections of any two needles , and following with the ...
With Descriptions of Some of the Apparatus Robert Sabine. Each pointer was deflected from its position of rest always under the same angle on each side , so that by observing the deflections of any two needles , and following with the ...
Página 55
... pointer to the right and to the left - as in Gauss and Weber's telegraph . Fig . 23 represents the interior view of the single - needle apparatus . A A is a long vertical coil of fine silk - covered wire , in the middle of which a small ...
... pointer to the right and to the left - as in Gauss and Weber's telegraph . Fig . 23 represents the interior view of the single - needle apparatus . A A is a long vertical coil of fine silk - covered wire , in the middle of which a small ...
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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...