To all whom it may concern:

Be it known that I, SAMUEL OAKMAN, a Citizen of the United States, residing at Melrose, in the county of Middlesex and state of Massachusetts, have invented and produced a new and original Design for Insulators, of which the following is a specification.

The drawing represents a perspective view of my design in elevation.

Heretofore insulators have been made which presented, when viewed in elevation, an irregular and complicated form not pleasing to the eye.

My design consists in having the insulator

shaped so as to be a regular paraboloid, or so near to this form as to strike the eye as such. This regular paraboloidical surface is interrupted by a single equatorial groove, as shown in the drawing.

I claim --

The design for an insulator herein shown and described, the body having the shape or configurations of the paraboloid traversed by an equatorial groove.

SAMUEL OAKMAN.

Witnesses:

HELEN M. FEEGAN,

WILLIAM EDSON.