A History of Wireless Telegraphy, 1838-1899: Including Some Bare-wire Proposals for Subaqueous TelegraphsDodd, Mead & Company, 1900 - 325 páginas |
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Página 8
... sensitive by a contact lever with unequal arms . Mr A. R. Sennett has also worked at the idea in more recent years . His method is very clearly described in the ' Jour . Inst . Elec . Engs . , ' No. 137 , p . 908 . and Chemistry , and ...
... sensitive by a contact lever with unequal arms . Mr A. R. Sennett has also worked at the idea in more recent years . His method is very clearly described in the ' Jour . Inst . Elec . Engs . , ' No. 137 , p . 908 . and Chemistry , and ...
Página 34
... amount of electricity likely to be available in such a case , I evidently required the aid of a very sensitive galvanometer , much more so indeed than the long pair of astatic needles and coil of the Cooke 34 FIRST PERIOD - THE POSSIBLE .
... amount of electricity likely to be available in such a case , I evidently required the aid of a very sensitive galvanometer , much more so indeed than the long pair of astatic needles and coil of the Cooke 34 FIRST PERIOD - THE POSSIBLE .
Página 35
... sensitive instrument on this principle , by which I succeeded in obtaining actual signals between lengths of elevated wires about 120 ft . apart . This , however , suggested nothing more at the moment than that the current discharged ...
... sensitive instrument on this principle , by which I succeeded in obtaining actual signals between lengths of elevated wires about 120 ft . apart . This , however , suggested nothing more at the moment than that the current discharged ...
Página 37
... sensitive as his Mirror Galvanometer . " This principle , as the practical reader knows , has been largely used in telegraphy . Besides Lord Kelvin's appli- cation of it , we have the Brown and Allan J. W. WILKINS . 37.
... sensitive as his Mirror Galvanometer . " This principle , as the practical reader knows , has been largely used in telegraphy . Besides Lord Kelvin's appli- cation of it , we have the Brown and Allan J. W. WILKINS . 37.
Página 56
... sensitive reflecting galvano- meter , and twelve cells of Grove's nitric acid battery , he could not get any signals , although the experiments were varied in every conceivable way . " Under these circumstances it will not be surprising ...
... sensitive reflecting galvano- meter , and twelve cells of Grove's nitric acid battery , he could not get any signals , although the experiments were varied in every conceivable way . " Under these circumstances it will not be surprising ...
Outras edições - Ver tudo
A History of Wireless Telegraphy, 1838-1899: Including Some Bare-wire ... John Joseph Fahie Visualização integral - 1899 |
A History of Wireless Telegraphy: Including Some Bare-wire Proposals for ... John Joseph Fahie Visualização integral - 1901 |
A History of Wireless Telegraphy, 1838-1899: Including Some Bare-wire ... John Joseph Fahie Visualização integral - 1900 |
Palavras e frases frequentes
apparatus arrangement battery cable cells centimetres charged Cheaper Edition circuit communication condensers conducting conductor connected copper wire Crown 8vo Daniell cell Demy 8vo detector diameter discharge distance disturbance Dundee earth effect Elec electric current electric waves electrical oscillations Electrician electro-magnetic employed ether ethereal waves exciter experiments Fcap feet filings Flat Holm galvanometer gutta-percha Hertz Illustrations inch increase induction coil Inst iron Leclanché cells length Leyden jar light lighthouse Lindsay magnetic Marconi means ments messages metallic method miles Morse Muckle Flugga needle obtained ohms ordinary paper parallel pass plates poles Portrait possible Post 8vo practical Preece produced Prof Professor receiving instrument reflector relay resistance river Scotland Second Edition secondary sensitive tube shore signals space sparks station surface tele telegraph telephone terminals tion transmitting trembler tricity University of Edinburgh vibrations vols Willoughby Smith wire wireless telegraphy yards
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