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 181
... shaft G. It is made up of three principal parts - the arm r , jointed at a ; the resting piece , or earth contact , r ; and the shovel r " . The vertical shaft q is of brass , and is divided electrically into two parts by an insulating ...
... shaft G. It is made up of three principal parts - the arm r , jointed at a ; the resting piece , or earth contact , r ; and the shovel r " . The vertical shaft q is of brass , and is divided electrically into two parts by an insulating ...
Página 183
... shaft 1 , H Fig . 91 . which is shown in section in Fig . 91 , and in the plan , Fig . 92 . The printing shaft turns seven times as fast as the type- wheel , and carries a fly - wheel , I " , at one extremity , in order to overcome the ...
... shaft 1 , H Fig . 91 . which is shown in section in Fig . 91 , and in the plan , Fig . 92 . The printing shaft turns seven times as fast as the type- wheel , and carries a fly - wheel , I " , at one extremity , in order to overcome the ...
Página 184
... shaft , i , is a cam , hi , for lift- ing the press and the paper against the type - wheel . The printing - press is shown in Fig . 93. Underneath the type - wheel is a small cylinder , a , over which the paper is APPAREIL . Fig . 92 ...
... shaft , i , is a cam , hi , for lift- ing the press and the paper against the type - wheel . The printing - press is shown in Fig . 93. Underneath the type - wheel is a small cylinder , a , over which the paper is APPAREIL . Fig . 92 ...
Página 186
... shaft has also the duty of correcting the movements of the type - wheel , and of insuring always that , at the ... shaft G. The electric circuits of the apparatus are very simple . The bottom of the vertical shaft , Q , is connected to ...
... shaft has also the duty of correcting the movements of the type - wheel , and of insuring always that , at the ... shaft G. The electric circuits of the apparatus are very simple . The bottom of the vertical shaft , Q , is connected to ...
Página 187
... shaft Q , which it descends , and goes over from the screw in the jointed arm , v , to the resting piece r ' , and ... shaft , the coils of the magnet , and line - wire to the other station , where it circulates in the coils of the ...
... shaft Q , which it descends , and goes over from the screw in the jointed arm , v , to the resting piece r ' , and ... shaft , the coils of the magnet , and line - wire to the other station , where it circulates in the coils of the ...
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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...