E. S. Greeley & Company, New York

Duplex Pin and Insulator.

The accompanying cuts illustrate a new style of insulator and pin, being introduced by the E. S. Greeley & Co. of New York. In Fig. 1 are shown the pin and insulator as they appear when detached from the cross-arm. Fig. 2 represents the manner in which the insulators are set, so as to facilitate the changing of the relative positions of the lines toward each other at every fourth or fifth pole, or as often as desirable.

Duplex Pin and Insulator.

The advantage of this arrangement when applied to telephone lines for anti-induction purposes, is evident. The application of the device to a testing pole is shown in Fig. 3. The wire is fastened to the top insulator, and a continuation of it fastened to the lower insulator. Connection between the two is made by a short piece of copper wire, which can be readily removed for purposes of testing, and restored again to close the circuit.

Duplex Pin and Insulator.

In Fig. 4 the device is applied as a "break-arm" for the establishment of loops. Fig. 5 shows the application of the system to elevated railway and other similar structures. It will be noted that not only is the distance between the various wires precisely the same with the use of this device as when the old style pin is employed with double the number of arms, but the strain of the wire is balanced so that there is no torsion upon the cross-arm.

Duplex Pin and Insulator.

Duplex Pin and Insulator.

Duplex Pin and Insulator.