To all whom it may concern:

Be it known that I, MINARD Y. HOLLEY, of Washington District of Columbia, have invented an Improvement in Telegraph -Insulators of which the following is a specification:

My improvement consists in constructing insulators, of glass or other non-conducting substance, of a triangular form, thereby presenting only three points of contact to the line and attaching wire, and, consequently saving a large amount of surface contact and a corresponding decrease in escape or leakage of the electric current in damp or wet weather.

The accompanying drawing--in which Figure 1 represents a perspective view, and Fig. 2 a view of the under side of the insulator--shows the nature of the improvement.

In Fig. 1, A A A represent the insulator; D D, the line-wire; C C, the wire that attaches the line-wire to the insulator. E E E represent the notches in which the line and attachment-wires rest. B represents the aperture for the support.

Fig. 2 represents a view of the under side of the insulator with the line-wire attached. d d represents the line-wire; c c c, the wire attachment; a a a, the point of contact; and B, the aperture for the support.

I claim as my invention--

A telegraph-insulator having the triangular form, as and for the purpose set forth.

  MINARD Y. HOLLEY.

Witnesses:

CHARLES BERKLEY,

CORNELIUS NOONAN.