To all whom it may concern:

Be it known that I, JOSEPHUS C. CHAMBERS, of Newport, Campbell County, Kentucky, have invented a new and useful Improvement in Lightning-Rods and Insulators, of which the following is a specification:

My invention relates to a form of glass or other suitable insulator for lightning-rods and similar conductors.

In the accompanying drawings, Figure 1 is a partially sectional elevation of a rod and insulator embodying my improvements. Fig. 2 is a perspective view, showing a series of the insulators supported by standards from the comb of a roof, and one for the attachment of the ground portion of the rod. Fig. 3 is a detailed view on a larger scale.

The insulator A is of glass, and may have the usual interior screw a, for attachment to a suitably screw-threaded stem or post, B. The said insulator expands at bottom into a shield, C, the flaring form of which adapts it to serve as a hood, preventing the electric current reaching the post B in a nearly vertical line, and has in its crown a notch, C', to receive and hold the rod D.  Said insulator has also a circumferential groove, B, for the reception and retention of the wire F, wherewith the rod is bound fast to the insulator.

For a spiral rod, such as D', Fig. 3, the bottom of the notch C' may have oblique indentations, as at c, to prevent the overturn or displacement of the rod by high winds or other causes; but I find in practice that the flanges of the spiral rod afford so secure a hold for the tying-wire that

when said wire is tightly applied the rod is firmly held against turning, even without the supplemental notches c.

In practice I place the points G G' at least six feet apart, and not less than six feet above the building.  When both points are upon a single insulator, one of them may be multiple in form, as at G', Fig. 1.

I claim as new and of my invention--

1. The spiral rod constructed with a horizontal attaching portion and one or more upturned receiving-points, in combination with the insulator constructed with a summit groove to receive the rod and a circumferential groove for the tying-wire to secure said rod in position, substantially as described.

2. The combination of the main groove C', for the reception of the rod, and the supplementary oblique grooves c, to receive the spiral flanges of the rod, and prevent it from turning.

3. A lightning-rod insulator constructed as herein shown, with a screw-socket for application to the post, an enlargement below the said screw-socket to prevent contact between the post and the neck of the insulator, and an umbrella-shaped flange expanding downward from the neck, serving to shed the rain and as a shield.

In testimony of which invention I hereunto set my hand.

  JOSEPHUS C. CHAMBERS.

Attest:

GEO. H. KNIGHT,

WALTER KNIGHT.