An Insulator to Prevent the Humming Noise of Wires

AN INSULATOR FOR ELECTRIC WIRES.

To prevent the humming noise caused by the vibrations of electric wires when they are fastened to poles or other supports, the insulator shown in the illustration has been devised and patented by Magin Riera, of Apartado 649, Havana, Cuba. Fig. 1 represents the insulator as attached to a support in use, Figs. 2 and 3 showing its clamping pieces, and Fig. 4 its central elastic insulating portion. The contacting surfaces of the clamping members are concaved and convexed respectively, or have a wedge-shaped projection and a corresponding recess, and they inclose between them an elastic filling slotted to about its center to receive the wire, the clamping pieces causing the split portion of the filling piece to closely hug the wire.

Riera's Insulator.