To all whom it may concern:

Be it known that I, FRED M. LOCKE, of Victor, in the county of Ontario, in the State of New York, have invented a new and original Design for an Insulator, of which the following, taken in connection with the accompanying drawings, is a full, clear, and exact description.

Figure 1 is a side elevation of an insulator complete.  Fig. 2 is a top plan view thereof.  Fig. 3 is a vertical section through the center.

The leading or material feature of my design consists in an insulator substantially as shown herein.

a is a concavo-convex disk, b is the boss, and C is a peripheral groove forming the line

of demarcation between the disk and the boss and creating a bead d upon the face of said boss, the whole forming a unitary article of manufacture.

      Having described my invention, what I claim, and desire to secure by Letters Patent, is--

      The design for an insulator substantially as herein shown and described.

      In witness whereof I have hereunto set my hand this 27th day of November, 1900.

               FRED M. LOCKE.

Witnesses:

H. E. CHASE,

HOWARD P. DENISON.