Modern practice of the electric telegraph. A handbook for electricians and operators (1872)
Pope, Frank L. (Franklin Leonard), 1840-1895 · New York : D. Van Nostrand · leaf 72
is the glass. This isgenerally made in the form represented by Fig. 32,which is a sectional view of the insulator fixed upon awooden bracket, the latter being securely spiked to theside of the pole. The line wire passes alongside thegroove surrounding the insulator, and is fastened witha tie-wire… … MODERN PRACTICE OF THE ELECTRIC TELEGRAPH. bracket and pole through the medium of a continuous stream of water. 93. THE WADE INSULATOR.—This is largely used in the Western States. Its construction is shown in Fig. 33.A glass insulator, somewhatsimilar in shape to that last{described, is covered…
Telegraph
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