US1764724A - Insulator - Google Patents

Description

* June 17, 1930. c, E, HOWELL 1,764,724

INSULAT OR.

Filed Jan. 11, 1928 INVENTOR %zfs AI'II'ITORMEY I Patented June 17, 1930 PATENT OFFICE GARLETON E. HOWELL, OF NEW YORK, N. Y.

INSULATOR Application filed January 11, 1928. Serial No. 245,890.

The invention relates to an insulator for high voltage and high tension conductors, and has for its purpose to provide a practical structure that can be advantageously used as either a suspension or a strain insulator.

More particularly, the invention has to do with a one-piece insulator of the general type in which two oppositely arranged straps, cables, or other supports cooperate with crossed openings in the insulator, and has for a further object to increase the leakage path between the metal parts, and afford an insulator of higher mechanical strength and with greater insulating qualities than insulators heretofore manufactured.

To these and other ends, the invention consists in the construction that will appear clearly from the following description when read in conjunction with the accompanying drawings, the novel features being pointed out in the claim following the description.

In the drawings:

Figure 1 is a perspective view of an insulator constructed in accordance with a preferred embodiment of the invent-ion;

Figure 2 is a plan view of the same;

Figure 3 is a side elevation;

Figure 4 is a sectional view on line 4ll of Figure 2, and

Figure 5 is a sectional view on line 5-5 of Figure 4.

It is to be understood that the structure of this application may be made from any suitable insulating material such as porcelain,

glass, or allied substances. Referring more particularly to the drawings, in which like reference characters refer to corresponding parts throughout the several views, the structure comprises a central body portion 1 which may be generally of cylindrical form in crosssection, or otherwise constructed, and is provided, preferably near its ends, with transverse openings 2 and 3 disposed at right angles to each other and adapted to receive the oppositely disposed supporting members l and 5, while 6 and 7 designate grooves forming convenient seats for the members 4 and 5, as shown. This heavy central body using material in compression gives great mechanical strength. The supporting members 4 and 5 may be cables, steel straps, or other metallic connecting or supporting devices, the particular means employed for connecting adjacent insulators forming no part ofthe in vention, and where employed for suspension or strain purposes, it will be understood that a series of insulators may be used one upon the other, as well known in the insulator art.

8 designates radial walls extending from one end of the body portion 1 to the opposite end thereof and constituting electrical barriers between the oppositely arranged supporting members f and 5, and thus preventing any substantial leakage in a lateral path from one metal member to the other, owing to the length of travel that is necessary for current passin around the outer edge of such radial wall. lhese radial walls being an integral part of the central body also add greatly to the mechanical strength of the entire structure. \Vith a construction such as thus far described, there is considerable likelihood of leakage between the oppositely arranged metal supports around the ends of the radial barriers just described and around the ends of the body portion 1 unless this is provided against, and the means for avoiding this will now be set forth.

The radial walls 8 are provided at their ends with transverse segmental walls 9, said walls being formed integrally with the walls 8 and connecting each alternate pair of said radial walls, the transverse walls 9 at one end of the insulator being staggered with reference to the walls 9 at the opposite end thereof. Thus the metal supporting members 4 and 5 are completely isolated and insulated from each other at the ends of the insulator and there is no chance of substantial current leak- 7 age around the ends of the body portion or around the ends of the radial walls owing to the transverse walls 9 which eifectively prevent such action. For any current to leak from one metal support to the other, it is necessary for it to pass either around the outer edges of the radial walls 8 or else around the outer curved edges of the transverse walls 9, and this reduces leakage of current to a negligible amount.

The construction described affords a simple and practical arrangement that will serve effectively to prevent leakage between a pair fiol owing claim;

vention is not confined, t0 the details set forth, and this application is intended to cover any modifications, or changes as come within, the purposes of the invention or the scope of the I claim: I All insulator, comprising a central body portion cylindrical in form and having transverse openings near its ends at right angles to each other to receive metal supporting meinbers, said cylindrical body portion having four relatively wideradial walls arranged at right angles to each other and constituting electrical barriers between the metal sup.- porting members, said Walls alternating radially with the aforementioned openings and equally spaced therebetween, and relatively wide transverse walls which are symmetrically arranged connecting alternate pairs of said radial. walls at opposite ends, acting to I prevent leakage around the-ends of the cylindrical body portion or around the ends oi the radial walls.

' In witness: whereof, I have hereunto. signed my name. I

CARLETO-N E. HOWELL.

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