New break arm insulator bracket

TRADE NOTES AND NOVELTIES

AND MECHANICAL DEPARTMENT.

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A NOVEL BREAK ARM.

In the varied electrical industries, as in other mechanical lines, the old and heavy cast iron appliances are being supplanted by lighter and neater ones of wrought or malleable iron. Quite recently we described a malleable iron wall-bracket, made by the Great Western Electric Supply Co., which marks another step in this direction. The same firm is now putting out the Chubbuck break arm, which is also made of malleable iron, and is claimed to be stronger, lighter and tougher than the forms now in use. Our illustration shows the rather neat design, with the strengthening rib and taper screw as in the Chubbuck (Springfield) bracket. The star shaped section of the arm gives great strength, while the hollow split screws have a slight spring and grip the insulator firmly. Another new feature is the small barbed pin used. As this is made for a 5/8 inch hole, the cross arm is weakened much less than by the 1 1/2 inch holes needed for other break arms. Moreover, when once driven in, the barbs catch in the wood, holding the arm firmly in its place.

A Novel Break Arm.

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