US929132A - Insulator. - Google Patents

Description

E. R. HILL.

INSULATOR.

APPLICATION FILED MAY 25, 1908.

929,132. v Patented July 27,1909.

2 SHEETS -SHBET 1.

ERR human y ERHL ZZ, in 001M601 E. R. HILL.

INSULATOR.

APPLICATION TILED MAY 25, 1908.

Patented July 27, 1909.

2 SHEETS-SHEET Z.

E.R.Hi ll, 5] vwa W606 551 h elite awe vS ERNEST ROWLAND HILL, or EAST ORANGE, NE ERSE INSULATOB.

Specification of Letters Patent.

Patented .m ev, 1909.

Amputation filed Kay 25, 1908. Serial No. 484,716.

To all whom ti 1M?! concern:

Be it known that I, ERNEST ROWLAND HILL, a citizen of the United States, residing at East Orange, in the. county of Essex and State of Newilersey', have invented certain new and useful Improvements in Insulators, of which the following is a specification, reference being bad to the drawings accompanying and forming part of the same.

- My invention relates to insulators, and has for its chief object to provide a simple, compact, and thoroughly reliable insulating de vice for sus ending electric cables, trolley wires, or 01; or conductors from the under side of structures of any sort, such as bridges, tunnels, mines, girders, brackets, etc. I An important field in which the invention finds special utility is that of alternating current railways where the trolley wire or wires from which current is taken are to be supported from overhead bridges-or hraclc ets, from bridge 'rders where crossing'the same, and from t e roof or arch of tunnels. Insulators for the class of service mentioned have heretofore been made .by molding inlsulating material around pins and supports or by cementing the latter to porcelain bodies. The former type has not proved wholly satisfactory in many cases. It is "generally conceded that porcelain is the superior material, especially for high tension work, but insulators with cemented parts are not satisfactory where reliance for mechanical strength is placed wholly upon the resistance of the porcelain or cement to tension or compression. Such insulators when broken, either from mechanical or electrical causes, allow the conductors to fall.

- In the present invention, porcelain, glass, or other suitable material is depended upon for insulation, and to .1 limited extent for mechanical strength, but the distinguishing feature of the invention is a-nove use of strong metal bonds for securing the wiresupport to the insulatin member and the The annular Figure 1 shows the insulator in vertical section. Fig. 2 is a vertical section at right angles to theplane of Fig. 1. Fig. 3 is a lan view of base or supporting plate by w ich the insulating portion of the device is suspended. Fig. 4 is a vertical section of another embodiment.

Referring to Figs. 1, 2 and 3, A designates an insulating body, referably a single piece of orcelain. This ody'may be, 'and prefera ly is, rovided with one or more petticoats, as s own, va 'ng in number, size and arrangement acoor ing to the voltage requirements and conditions of use. The to of the body, which in the form illustrated 1s circular in plan, is made slightly flaring, as shown at B. On this flaring topis a supporting member or base by whlch the insulator may be suspended For some purposes it may be desirable to provide the sup porting member with trunnions, to permit slight play of the insulator in the direction of the conductor, but in general I preier"-to have the insulator mounted rigidly and hence prefer to make the supporting member in the form of a plate, 0, provided with upwardly and outwardly extending ears D by which it may be sccu-rel bolted to the underside of the structure .111 which the insulator is tobe used- On the bottom of supporting member or plate is an undercut recess E to receive the flaring top of the body A. ace between the two parts may be filled with cement if desired.

Extending through-the body, and open at the top thereof, is an arc-shaped passage or aperture F, to reeeive an arc-shaped U- bolt G, which, extending through the plate or supporting member 0, binds the body A firmly and rigidly thereto. At right angles to the passage or aperture F is a similar aperture, H, crossing above the former, so

that the two are linked, soto speak. The

aperture or passage H is downwardly dissed, and carries a U-bolt I, similar to the ormer. v

On the underside of the body A 1s a conducto-r-su porting member or device J, rovided with suitable means, as for exam e a downwardly extending threaded stem for sup rting a conductor. The device J is pre erably a dish-shaped plate, as shown, and is 1'1 'dly bound to the insulating body by the bin ing bolt or bond I in the manner shown. The space between the center portion of the device J and the insulating body, and also any s ace between the body and the plate C, may e filled withgrout or cement, if desired.

The body A is not molded around the U- bolts; instead, the apertures therefor are formed in the body and the bolts inserted afterward. Hence, in order to permit insertion of the bolts, the apertures therefor are made circular, with their centers outside the body, thus enabling the bolts to be slipped into place easily and quickl An space left in the passages may be ed wit cement or grout.

Another form of binding members for securing the three parts of the insulator-together is illustrated in Fig. 4. Here the form of the passages in the insulating body A is such that unyielding bonds cannot be assed through them, and hence I use flexi le devices for the purpose, such as short pieces of cable, G, I. In order to secure the ends of .the bonds, so as to bind the insulator parts together with the desired rigidity, the openings in the members C and J which receive the bonds are enlarged and the ends of the bonds are expanded tightly therein in any convenient and suitable way. i

From the-foregoing description it will be seen that practically the only stress on the insulating ody when the device is in use is a compression between the binding members. If from any cause, either electrical or mechanical, the porcelain body should be broken, the insulating properties of the structure are not wholly destroyed-unless the insulating material should actually be displaced from between the linked binding members, thus allowing the same to come mto contact. In any case, however, the suspended conductor will still be supported instead of being allowed to fall to the ground as usually happens when breakage occurs in an insulator 1I1 which the supporting members are secured by cement.

The device can be made in very compact form, as in the forms illustrated, so as to take up only a small sIpace, a feature of special advantage where c earance above a car or train is slight. The device is also sim Is in construction, can be assembled quic y, and the metal supporting members can be cheaply made by casting.

While I prefer the forms herein specifically described, as the best forms for most purposes, it is to be understood that the invention is capable of other embodiments without departure from its proper spirit and scope as defined by the appended claims.

What I claim is:

1. In an insulator, the combination'of a one-piece insulating body; a member for supporting the said body in depending position; a U-shaped bond passin through the body and binding the same to the supporting member; a second U-sha ed bond assing through the body and .lin ed with t e first but spaced therefrom; and a conductorsup orting device secured to the underside of t e body by the second U-shaped bond; as set forth.

2. In an insulator, the combination of a one-piece insulating body; a member for supporting the body in depending position; a U- olt passing through the body and binding the same to the su porting member; an inverted U-bolt asslng through the body and linked with t e first U-bolt but spaced therefrom; and a conductor sup orting device secured to the underside of the body by the inverted Ubolt; as set forth.

In an insulator, the combination of a one-piece insulating body; a member for ,supporting the body in depending pos1t1on a U-bolt assing through the body and havlng its en s extending upwardly through the supporting member to secure the body thereto; a conductor-supporting device on the underside of the body; and an inverted U-bolt passing through the body and having its ends extending downwardly through the conductor-supporting device to secure the same to the bod as set forth.

4. In an insu ator, the combination of a 5. In an insulator, the combination of a supporting plate; a one-piece insulatin body fitting the underside o the plate; sai

body being provided with upwardly and downwardly extending arc-shaped assages or a ertures, crossin one above t e other within the body; a ate on the underside of the body and rovi ed with means for supportin a con uctor; and arc-shaped bolts exten ing' through the said passages 01' a ertures and binding the said plates and t e body securely together; as set forth.

6. In an insulator, the combination of a sup orting member; a one-piece insulating bo y on the underside ofthe sup orting member, provided with upwardly and downwardly extending arc-shaped apertures crossing one above t e ot er at right angles within the body; a su porting member on the under side of the ody for supporting a conductor; and arc-shaped bo ts extending through the said passage or apertures and binding the supporting members and the body rigidly together; as set forth.

7. In an insulator, the combination of a supporting plate having an undercut recess assa es of on its under side; a one-piece insulatin body having a flaring top cemented in sai I recess, said body bemg provided with upwardly and downwardly extending areshaped assa es or apertures crossing one above t e ot er within the body; a-oonductor-supporting member on the under side of the body; and ai'c-shaped binding bolts ceinented in the passages or apertures of the boclfi and binding the supporting plate, the 10 ins atin body, and the eonductor-supporting mem er 'dl toether; ess'etforth, 5 ER E T1 fiDWLAND Witnesses:

THOMAS J. BIRNES, S. DUNHALL.

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