American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 650
or pulled off, the wire willrest on the bracket until the insulator is replaced. bracket. pin. The cross-arm is composed of an oblong piece of wood of varying length andthickness, according to the weight it may have to support, placed cross wise on thepoles. On the cross-arms are placed ^ pins,… … a flat surface for the cross-arms The gains should not be less than two inches indepth and should be cut to hold the cross-arm snugly. Tlie top gain shouki be abouteight inches from the top of pole; the other gains should be twenty-four inches apart.The cross-arms are placed in the gains after the…
Telegraph
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