US1720181A - Insulator - Google Patents

Description

July 9, 1929. K LE 1,720,181

INSULATOR Filed Jan. 25, 1926 W11hdmD-Ky1E Patented July 9, 1929.-

UNITED STATES 1,720,181 PATENT OFFICE.

WILLIAM D. KYLE, F MILWAUKEE, WISCONSIN, ASSIGNOR TO LINE MATERIAL GOM- PANY, OF SOUTH MILW AUKEE, WISCONSIN, A CORIPORATION OF WISCONSIN.

INSULATOR.

Application filed January 25, 1926. Serial No. 83,564.

This invention relates to certain new and useful improvements in insulators of that type commonly known as house brackets.

Heretofore insulators or brackets of this type have been usually supplied with an attaching member cemented in a recess formed therein. This construction has several inherent deficiencies or failings the most noticeable of which is its inability to successfully withstand .the various stresses applied thereto and, therefore, it is an object of this invention to provide an insulator having means for attachment to a support whereby the insulator is free to adjust itself to more readilyv l5 withstand all working stresses.

Another object of this invention resides in the provision of an insulator having a securing means, whereby upon attachment of the insulator to a support, the porcelain thereof is free to pivot to a position in which the insulator is better adapted to meet the given stresses and put the porcelain thereof in compression.

A'further object of this invention is to rovide an appliance of the class described w ich is of simple and durable construction and which r uires no assembling of parts.

With t e above and otherobjects in view which will appear as the description prol0 coeds, my invention resides in the novel construction, combination and arrangement of parts substantially as hereinafter described and more particularly defined by the appended claims, it being understood that such 5 changes in the precise embodiment of the herein disclosed invention may be made as come within the scope of the claims.

In the accompanying drawing, I have illustrated one com lete example of the physia cal embodiment 0? my invention constructed according to the best mode I have so far devised for the practical ap lication of the principles thereof, and in which: I

Flgure'l is a perspective view illustrating i the a lication of my improved insulator to a bui 'ng or other support;

Figure 2 is a sectional view of the insulator detached from its support and taken through Fi re 1 on the plane of the line 22, and

l igure 3 is a sectional view of the insulator taken through Figure 2 on the plane of the line 3-3.

Referring now more particularly to the accompanylng drawing in which like numerals designate .like parts throughout the several views, the numeral 5 designates a support shown in the drawing as a portion of the wall of a building. The insulator or bracket 6 preferably of porcelain or other insulating material is secured thereto by an attaching screw 7, passed through a longitudinal bore 8 which is offset with respect to the longitudinal axis of the insulator. The outer end of the bore is preferably countersunk, as at 9, to receive the head of the attaching screw.

The insulator is further provided with a transverse o ening 10, adapted to receive a wire, and a c annel 11 in its outer periphery and in line with the transverse opening.

If desired, the line 12 may be passed directly through the opening 10, but the more usual method is to engage the line in the channel 11 and thread its tie wire 13 through the opening. This secures the line to the insulator with a minimum of efiort. In attaching the insulator to its support, the screw 7 is preferably drawn just tight enough to draw the approximate oval shaped base 14 of the porcelain against the support, but at the same time permit the porcelain member to swivel or plvot on the screw 7 when moved under str In the drawing'I have shown the insulator supporting a horizontal line wire, the stress applied thereby is all in a downward direction and the insulator due to the eccentric position of the screw 7 has taken a position with the toe of its'base in line with the direction of the applied stress, thus putting all parts of the porcelain in compression.

Assume now that instead of continuing the end 12' of the line horizontally as shown, it is brought down vertically in line with the side of the building, the direction of the resultant stress is at an angle toboth ends of the line and substantially .bisects the angle formed thereby. The porcelain insulator will no longer retain its (position with the toe of the base pointing ownward, but is swung on the screw so that the direction in which its toe points coincides with the direction of stress. Thus it will be seen that the insulator is free to adjust itself to a position putting it in compression no matter what the direction of the applied stress is.

What I claim as my invention is:

An insulator of the class described, comprisin a body portion substantially oval shape in cross section with its lnner end perpendicular to its axis and having a single bore in its major axial plane extending longitudinally through said body at a point spaced from its center of gravity and an opening passing transversely through the body portion, the opening communicating With a reduced medial portion at the outer end of the body portion and With a circumferential channel, and means passed through the longitudinal bore for securing the insulator to lo means to point its center of gravity towards the direction of stress.

In testimony whereof I afix my signature WELL1AM D.

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