The History and Progress of the Electric Telegraph: With Descriptions of Some of the ApparatusD. Van Nostrand, 1869 - 280 страници |
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Страница xi
... Circuit 113 83. Method of Translation between a Line with closed and one with open ... Wire 86. Gintl's Method with Relays 119 • 119 87 . 99 99 by Chemical Means ... Line 90. Stoehrer's Double - style Apparatus . 29 Alphabetical Code 92 ...
... Circuit 113 83. Method of Translation between a Line with closed and one with open ... Wire 86. Gintl's Method with Relays 119 • 119 87 . 99 99 by Chemical Means ... Line 90. Stoehrer's Double - style Apparatus . 29 Alphabetical Code 92 ...
Страница xiii
... Wire . " " 99 " " 143 . 144 . Protection of دو وو Joints in . 145. Erection of Overland Lines 146. Stays and Struts . Stretching the Line 147. Phenomenon of Charge in Wires • 148. The Earth - plate VII . SUBMARINE TELEGRAPH LINES ...
... Wire . " " 99 " " 143 . 144 . Protection of دو وو Joints in . 145. Erection of Overland Lines 146. Stays and Struts . Stretching the Line 147. Phenomenon of Charge in Wires • 148. The Earth - plate VII . SUBMARINE TELEGRAPH LINES ...
Страница 3
... wire 700 feet long , suspended in the air by silk threads , to one end of ... line formed of a hempen cord supported in the air by means of very fine silk ... line . One end of the line supported . an electrometer formed of a small ivory ...
... wire 700 feet long , suspended in the air by silk threads , to one end of ... line formed of a hempen cord supported in the air by means of very fine silk ... line . One end of the line supported . an electrometer formed of a small ivory ...
Страница 7
... wire , and the same distance of earth , at Stoke Newington ; and on the 14th ... line of wooden poles erected on Shooter's Hill . Franklin made similar ... wire of considerable length , to the com- munication of intelligence . II ...
... wire , and the same distance of earth , at Stoke Newington ; and on the 14th ... line of wooden poles erected on Shooter's Hill . Franklin made similar ... wire of considerable length , to the com- munication of intelligence . II ...
Страница 9
... wires in contact with the barrel , let a second set reach from the electrified cable , so as to be in contact with the ... wire that has been tried hitherto , yet , as that has never exceeded some ... line of B 3 THE ELECTRIC TELEGRAPH .
... wires in contact with the barrel , let a second set reach from the electrified cable , so as to be in contact with the ... wire that has been tried hitherto , yet , as that has never exceeded some ... line of B 3 THE ELECTRIC TELEGRAPH .
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Често срещани думи и фрази
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
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Страница 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.
Страница 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...