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
... Type - printing Telegraphs . § 111. Classes of Type - printers 112. Hughes's Roman Type - printer . 113. House's Printing Telegraph 114. Desgoffe's Type - printer • 169 • 172 . 175 178 • . 179 190 · . 192 194 116. Morènes ' 115. Joly's ...
... Type - printing Telegraphs . § 111. Classes of Type - printers 112. Hughes's Roman Type - printer . 113. House's Printing Telegraph 114. Desgoffe's Type - printer • 169 • 172 . 175 178 • . 179 190 · . 192 194 116. Morènes ' 115. Joly's ...
Página 54
... Type - printing telegraphs . ( d ) Copying telegraphs . ( a ) Needle and Acoustic Telegraphs . 48. Needle instruments , which were the first introduced into practical telegraphy in England by Messrs . Cooke and Wheatstone , are ...
... Type - printing telegraphs . ( d ) Copying telegraphs . ( a ) Needle and Acoustic Telegraphs . 48. Needle instruments , which were the first introduced into practical telegraphy in England by Messrs . Cooke and Wheatstone , are ...
Página 152
... Type Telegraphs . - Towards the end of the year 1861 Messrs . Siemens and Halske succeeded in the construction of a ... types drawn under the lever by the same mechanism which is used to turn the coil . Line M A M1 Fig . 73 . www.byers ...
... Type Telegraphs . - Towards the end of the year 1861 Messrs . Siemens and Halske succeeded in the construction of a ... types drawn under the lever by the same mechanism which is used to turn the coil . Line M A M1 Fig . 73 . www.byers ...
Página 153
... types , which are set up in a port - rule in order , like printing types , are made of thin pieces of metal cut in teeth , in forms resembling those shown in Fig . 75 , represent- ing the letters A and B. The bottom of the port - rule ...
... types , which are set up in a port - rule in order , like printing types , are made of thin pieces of metal cut in teeth , in forms resembling those shown in Fig . 75 , represent- ing the letters A and B. The bottom of the port - rule ...
Página 154
... types , by means of the spring s . The figure , however , shows the point L lifted up by the broad tooth of the letter B S wwwww Fig . 74 . A , and the arm L1 , therefore , pressed against the contact screw 2. The types are straightened ...
... types , by means of the spring s . The figure , however , shows the point L lifted up by the broad tooth of the letter B S wwwww Fig . 74 . A , and the arm L1 , therefore , pressed against the contact screw 2. The types are straightened ...
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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...