. American telephone practice . jAMBJLBLEC: FIG. 557. R MSTNG 784 AMERICAN TELEPHONE PRACTICE. iy feet in length into which a hardwood spar is inserted, so that atelescopic adjustment is afforded, thus giving a long boom suitable toraising different lengths of poles. By this 70 feet inlength are easily handled. On the front end of the wagon ismounted a hand-operated hoisting winch for adjusting the guysleading to the end of the boom. By this means the angular positionof the boom may be adjusted to any degree even while subjected tothe weight of the pole. Steam or electric p
. American telephone practice . jAMBJLBLEC: FIG. 557. R MSTNG 784 AMERICAN TELEPHONE PRACTICE. iy feet in length into which a hardwood spar is inserted, so that atelescopic adjustment is afforded, thus giving a long boom suitable toraising different lengths of poles. By this 70 feet inlength are easily handled. On the front end of the wagon ismounted a hand-operated hoisting winch for adjusting the guysleading to the end of the boom. By this means the angular positionof the boom may be adjusted to any degree even while subjected tothe weight of the pole. Steam or electric power has been proposed for raising the poles.
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Keywords: ., boo, bookcentury1900, bookdecade1900, bookidamericantelepho00mill
