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 137
al protection from chaling against the neck ofthe insulator. With a moderate amount of care, howevei,many miles of copper wire can be erected without theslightest risk of failure. In binding copper wire to an insulator, it is necessary, aspreviously stated, to protect the conductor fmiu chafing,… … tape does not lie slack on tliewire. A special binder is thenemployed made of copper wireflattened ont at the ends andwell annealed. This hinder isplaced round the neck of theinsulator and the flattened endsbrought one over and one underthe line -^^-ire and twisted roundover the layer of tape (as…
Telegraph
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