New Split porcelain insulator

Split Porcelain Insulator.

A new type of porcelain insulator, known as the "split porcelain insulator" is manufactured by the Western Electric Company of Chicago. The accompanying illustration gives a good idea of the general construction. The insulator is made of the best grade of porcelain and is cylindrical in shape, divided into two parts by an irregular transverse cut. The holes for the conductors are situated on either side of the cylinder and are intersected by the dividing line, the interior of the holes being corrugated to secure a good grip on the wire.

Split Porcelain Insulator.

One screw passing up through the center serves the double purpose of clamping the two parts together and fastening the insulator to the ceiling. As seen in the illustration, the two parts are symmetrical with respect to the dividing line and there-fore are interchangeable, any two pieces making a knob.