Cinch insulator

The "Cinch" Insulator.

The suspension of the trolley wire in such a way as will secure perfect insulation, and yet hold the wire firmly to the supporting arm or stringer has been a problem of much difficulty in constructing overhead lines for electric railways. Unfortunately, the best insulating material is not best adapted to endure the continual strain to which a trolley wire supporter is subjected, or resist the action of the weather to which it is always exposed.

The manufacturers of the insulator herewith illustrated claim, however, that it unites, in an exceptional manner, strength, durability and high insulation. Combstock rubber is the insulating material used, and of this is formed the top of the insulator, which is clasped to the supporting wire, as shown in the cut. Into this head is fitted the malleable iron stem to which is riveted the brass fin that supports the trolley wire. The cross section of the head of the insulator shows an entire absence of screw threads

The "Cinch" Insulator.

or other parts subject to deterioration by exposure to the weather, while its design is such that compression is the only strain placed upon it. Much care has been given to the details of the insulator, and, though its price is low, the makers claim that in strength, durability and insulation it will be found well adapted for its purpose. This insulator is manufactured by Messrs Emmet Bros. & Griswold, New York.