. American telephone practice . avy wire. Another method, known as the Helvin tie, is shown in Fig. has been used with considerable success with hard drawn cop-per wire, but is not now used so far as known. In this the tie wireis first wrapped around the insulator and twisted once or twice onitself, after which the ends are twisted around the line wire as before. Still another method of tying the wire to the insulator is shown inFig. 581, this being now used exclusively in copper wire work. Inthis, as in the first method, the line wire is laid in the groove of theinsulator, and the ti
. American telephone practice . avy wire. Another method, known as the Helvin tie, is shown in Fig. has been used with considerable success with hard drawn cop-per wire, but is not now used so far as known. In this the tie wireis first wrapped around the insulator and twisted once or twice onitself, after which the ends are twisted around the line wire as before. Still another method of tying the wire to the insulator is shown inFig. 581, this being now used exclusively in copper wire work. Inthis, as in the first method, the line wire is laid in the groove of theinsulator, and the tie wire is passed entirely around the groove, oneend passing down over the line and the other end up under it, thetwist being made as shown. Where an iron wire is dead-ended it is simply passed once around POLE LINE CONSTRUCTION. 801 the insulator and twisted five times upon itself, the twist beginningat a distance of about two inches from the insulator. The method ofmaking this tie is shown in Fig. 582. In the case where trans-.
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