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Elementary telegraphy : a manual for students; written specially to meet the requirements of the ordinary grade of the subject as published in the syllabus of the city and guilds of London Institute (1910)

Pendry, H. W. (Henry Walter) · London ; New York : Whittaker & Co. · leaf 158

An illustration from Elementary telegraphy : a manual for students; written specially to meet the requirements of the ordinary grade of the subject as published in the syllabus of the city and guilds of London Institute, 1910, leaf 158
remainderis twice a. In a similar manner the resistance of any ofthem could be calculated. llie position of an eavth fault can he found hy loopingthe faulty wire with another good conductor. Tiie resist-ance of the metallic circuit thus formed if not recorded isfirst measured l)y connecting both… … Fi(i. 124.—Vailcy luoii test for iiosition of eartli fault. folloAving proportion exists : (let L be the ascertained valueof the loop and x the portion from /) to the fault)— a [) + , :. a (1) + ,r) =- /> (L - .r) and al) + (IX = l)L - l>x, i.e. ax + hx = hL — aD, .. x = hl.~al)a + h If the…

Telegraph

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