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 177
... wheel , and dial , the electro - magnets being both magnetised by the same currents and demagnetised at the same ... type from those of Stöhrer , Siemens , and Kramer in Ger- many . And these , again , have taken a form totally dis ...
... wheel , and dial , the electro - magnets being both magnetised by the same currents and demagnetised at the same ... type from those of Stöhrer , Siemens , and Kramer in Ger- many . And these , again , have taken a form totally dis ...
Página 180
... type - wheel is transmitted to a vertical arbor , furnished at its lower extremity with a horizontal arm travelling ... type - wheel , comes in contact with the pin just at the moment when the corresponding type is at the lowest point ...
... type - wheel is transmitted to a vertical arbor , furnished at its lower extremity with a horizontal arm travelling ... type - wheel , comes in contact with the pin just at the moment when the corresponding type is at the lowest point ...
Página 181
... type - wheel . Below each of the keys is a movable lever , whose fulcrum is at K " , and which terminates at the bottom of one of the contact - pins , K K , arranged in a circle in the metal box a , in the top and bottom of which are ...
... type - wheel . Below each of the keys is a movable lever , whose fulcrum is at K " , and which terminates at the bottom of one of the contact - pins , K K , arranged in a circle in the metal box a , in the top and bottom of which are ...
Página 183
... wheel , G5 , attached to the axis G , the click , m1 , being on the axis c c ' . On the latter are supported , besides the type - wheel and click , a corrector , H ' , or wheel with long narrow teeth , equal in number to the types ...
... wheel , G5 , attached to the axis G , the click , m1 , being on the axis c c ' . On the latter are supported , besides the type - wheel and click , a corrector , H ' , or wheel with long narrow teeth , equal in number to the types ...
Página 184
... wheel , in the teeth of which catches a click affixed to a movable piece , b1 , terminating O the end of the continuation shaft , i , is a cam , hi , for lift- ing the press and the paper against the type - wheel . The printing - press ...
... wheel , in the teeth of which catches a click affixed to a movable piece , b1 , terminating O the end of the continuation shaft , i , is a cam , hi , for lift- ing the press and the paper against the type - wheel . The printing - press ...
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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...