Modern practice of the electric telegraph : a handbook for electricians and operators (1874)
Pope, Frank L., 1840-1895 · New York : D. Van Nostrand · leaf 65
another connects p and /,thus keeping the extra local circuit constantly closed,and the armature lever d withdrawn from interferencewith a. 52 MODERN PRACTICE OF THE ELECTRIC TELEGRAPH. The same thing may be accomplished by causing thebutton to break the extra local circuit entirely, whenthe… … 80. Bunnells Repeater.—The arrangement of themain circuits in this repeater is exactly the same as in THE MORSE, Ofc AMERICAN TELEGRAPHIC SYSTEM 53 the ordinary button repeater/ and will be readilyunderstood by reference to fig. 29. The eastern mainwire enters at the right, passing through the…
Telegraph
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