To all whom it may concern:

Be it. known that I, GEORGE W. OTIS, of Lynn, in the county of Essex and State of Massachusetts, have invented a new and Improved Mode of Attaching Lightning-Rods to Buildings by Means of Glass Isolators; and I do hereby declare that the following is a full and exact description.

This invention consists of three parts, to wit: first, a solid glass cylinder second, a metallic point or conductor, third, a wooden collar.

Said cylinder is one and a half inch in diameter and two inches in length, having in one end bore three quarters of an inch in depth in which to fix said point or conductor, and around the edge of the other end a lip or flange one-eighth of an inch in width and one-quarter of an inch in thickness, by which to be kept in its place by the collar.

Said point or conductor is fixed in said bore in the cylinder, and extends horizontally therefrom four inches.  The first three-quarters of an inch thereof from the end of the cylinder is square, having all opening through for the passage of the lightning-rod.  Thence it tapers to a point.

Said collar is round, and is made, by means of a circular groove inside, to fit over and around said cylinder and lip or flange, so that its base and the base of said cylinder

present a uniform surface.

The three parts being thus put together constitute the isolator, which is to be fastened rectangularly to the building by means of screws or nails throng the collar.  The lighting-rod is then passed up the side of the building through said opening in the point or conductor.

The office of the collar is to fasten the cylinder and point or conductor to the building.

The office of the glass cylinder is, by isolation, to prevent the passage of electricity from the lightning-rod to the building.

The office of the metallic point or conductor is to secure the lightning-rod and to divert and dissipate the electricity.

As many of the isolators are to be used in as may necessary to support the lightning-rod.

What I claim as my invention is--

The insulated support and point for lightning-rods, consisting of the insulated point and opening in its shank, the insulating-cylinder of glass, with its lip or flange, and the wooden collar for securing the whole to the building, all as described.

GEORGE W. OTIS.

Witnesses:

CHAS. W. STOREY,

SETH J. THOMAS.