. The practical telephone handbook and guide to the telephonic exchange . ing screw isthen tightened on to thebands, and the nut andwasher is used to clampthe connecting wire. Asecond nut on the screw,to serve as a lock nut,would be an type of earth connector adopted by the National Tele-phone Co. is shown in Fig. 1416, which gives two views. After eight complete turns have been made round the combination by the earth wire the latter is tightened on to the pipe by means of the two screws. Tools required.—The tools neces-sary for fixing are : Cutting pliers, long-nose pliers, la
. The practical telephone handbook and guide to the telephonic exchange . ing screw isthen tightened on to thebands, and the nut andwasher is used to clampthe connecting wire. Asecond nut on the screw,to serve as a lock nut,would be an type of earth connector adopted by the National Tele-phone Co. is shown in Fig. 1416, which gives two views. After eight complete turns have been made round the combination by the earth wire the latter is tightened on to the pipe by means of the two screws. Tools required.—The tools neces-sary for fixing are : Cutting pliers, long-nose pliers, large and small screw - drivers, gimlets, bradawls, plugging chisel, large and small hammer, 2-foot rule, bell-hangers augur, tenon saw, and soldering addition to above, a joiners chisel, detector galvanometer, and a pair of tweezers will often prove useful. It is advisable that the small tools should be mounted on a slip of leather, such as used by joiners. This can be rolled up. It will protect the tools, and a glance will show if all the tools are CHO Fig. 1416.—Earth-WireClamp. N. T. Co. s pattern CHAPTER VIII INTERMEDIATE SWITCHES AND EXTENSION INSTRUMENTS The simplest form of a telephone installation is a line havinga telephone set connected at each end, as in Fig. 142. Nextto this in simplicity is that of three telephone sets connectedto the same line—one set at each end, and another one con-nected at some intermediate point, as in Fig. 143, the in-strument being connected as a shunt across the metallic SI
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Keywords: ., bookcentury1900, bookdecade1900, booksubjecttelephone, bookyear19
