. American telephone practice . ses no function as a conductor, and might beof insulating material. It is found, however, that insulating materialin this place will not stand the wear of the constant insertion andwithdrawal of the plug, therefore an insulated metal ring is used. The end of the cord opposite the plug end is usually providedwith some metallic clip or terminal, such as shown in Fig. 372, thisparticular cut representing the Kellogg method. The method ofapplying this terminal is similar to that described in applying thetip strand terminal to the plug end, as shown in Fig. 370, but
. American telephone practice . ses no function as a conductor, and might beof insulating material. It is found, however, that insulating materialin this place will not stand the wear of the constant insertion andwithdrawal of the plug, therefore an insulated metal ring is used. The end of the cord opposite the plug end is usually providedwith some metallic clip or terminal, such as shown in Fig. 372, thisparticular cut representing the Kellogg method. The method ofapplying this terminal is similar to that described in applying thetip strand terminal to the plug end, as shown in Fig. 370, but in thiscase the metal terminal is fork-shaped and is squeezed tightlyaround the wrapping of wire on the outside braid of the cord. 524 AMERICAN TELEPHONE PRACTICE. The tinsel projects through this and is soldered to the terminal, as isclearly shown. The switchboard cord, where this is of the two-conductor type, forks at the end opposite the plug end, and at thisfork the braid is usually extended in the form of a loop, which may. FIG. 372.—RACK END OF CORD. be hooked on to the cord-connecting rack to form a support forthe cord, which will relieve the conductors from strain due to thecord weights. The method of connecting the cord to the connecting rack isshown in Fig. 373, which shows two stationary terminals secured tothe rack, to which are secured by screws the fork-shaped cord ter-
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