US836122A - High-potential insulator. - Google Patents

Description

No. 836,122. PATENTED "NGV, E, M06, E. M. LOGKE.

HIGH OTENTIAL INSULATGR.

APPLICATION FILED MAR.23,1903.

WIT/VE' S SE S,

To v1r/ZZ whom it may concern."

FRED M LooKEQ or vieron, NEW roEKl HleH-PQTENi'IAL'iNsuLATon.

no. 836,122.l

`Be it known that 1,' FRED M. Looms, oi Victor, in the county of Ontario, in the State of New York, have invented new and useful Improvements in High-Potential Insulators, of which the following, taken in connection With the accompanying drawings, is a full, clear, andexact description. y

This invention relates to improvements in high potential insulators and fastening means therefor, and refers more particularly to that class in which a center insulatingsleeve is held to the cross-arm by a clampingbolt anchored within the sleeve and clamped to the cross-arm.

The primary object of this invention is to anchor the head of the bolt wholly within the body of the sleeve tor the purpose of' increasing the arcing-space between the bolt and the electric conductor, which may be secured to the insulator. These insulators are adapt- -ed to support the conductors for high-voltage electric currents; and my object, therefore, is not onlyto guard against the punctural'iility of the insulators, but also to prevent the leakage of part of the current to the cross-arm or anchoring-bolt.

In the drawings, Figure 1 is a transverse vertical sectional view of an insulator, a cross-arm, and a clamping-bolt for securing the insulator to the cross-arm. Fig. 2 is a transverse vertical sectional view lof a slightly-modified form of insulator and tastening means therefor.

Similar reference characters indicate corresponding parts in both views.

In carrying out the objects of this invention I have shown a porcelain insulator composed ot an inner hollow center piece or sleeve 1 and anouter bell-shape section 2, the inner section being mounted upon a cross-arm and is provided with. a lengthwise yaperturet for receiving a clampingbolt 5.

The aperture 4 of thersleeve 1 is enlarged at its upper end for forming a socket 6 and a shoulder 7, the socket 6 opening from the outer end of the sleeve 1 and extending inwardly a considerable distance from said outer end, so as to form a considerable arcing-space between the conductor and bolt 5.

The clamping-bolt is arranged in the aperture 4, and its outer end is provided with a head 8, which engages the shoulder 7 at the base of the socket 6, while the other end of l Speccaton of Letters Patent.

- v l Applicata@ tied March 23. 190e. 4serai No. 149,124.

Athe cross-arm and is threaded `Patented. No'v. 2o, 190e.

the bolt 5 is passed through an aperture Qin for receiving a clan'iping-nut 10,` engaging the opposite face of the cross-arm, whereby when thev nut is screwedy in one direction the insulatingsleeve 1 is drawn into .engagement with the cross-'arm andheld fromendwise or lateraly movement. i .l

In Fig. 2 I have shown an insulator composed ot an inner sleeve 1 and an outer section 2', the inner sleeve resting upon a crossarm 3 and is provided with a lengthwisetapering opening 4-, which gradually increases in diameter from its inner end adjacentto the cross-arm toward the outer end for receiving a tapering clamping-bolt 5', which also increases in diameter from its inner end adjacent the cross-'arm outwardly for the purpose of forming an enlarged head to hold the insulator-sleeve 1 when the bolt is clamped to the cross-arm 3.

The outer end or head of the bolt terminates a considerable distance within the outer end of the sleeve 1, so as to remove it as far as possible from the conductor, (not shown,) and thereby prevent the arcing of the current from the conductor to said bolt or shaft.

The outer tapering end of the bolt or shaft 5 within the socket 4 is surrounded by a suitable cement or filling 11, which serves to secure the adjacent parts together, while the lower end of the bolt or shaft extends through an aperture 9 in the cross-arm 3 and is threaded to receive a clamping-nut 10, whereby the bolt or shaft is drawn endwise, and thereby clamps the insulator-sleeve 1 firmly upon the cross-arm.

The center piece (shown in Figs. 1 and 2) is also bell shape, except that the center-bolt opening extends entirely therethrough from top to bottom, so that the exterior diameter of the lower end of this center piece is greater than that of its upper end, while the interior diameter'of the upper end is greater than that of its lower end, and in both instances the upper end of the bolt terminates some distance below the upper end of the center piece Vfor the purpose of establishing an arcing-space between the head of the bolt and the conductor, which maybe attached to the outer' sleeve, as 2 or 2. l,

The obj ect oi' flaring the bases oi the insulator-sections outwardly' from top to bottom is to neutralize as far as possible the static in positionI ICO injurious effects upon the oross-arin or insulator-pin and also to prevent short circuits between the conductor and fastening-bolt' for tne insulator.

It is now a parent that the lower portions of each-of tile bolt-openings 4 and 4 are smaller than their upper portions `and that the upper end ofthe bolt is larger than the lower end of the opening through which it passes, while the diameter oi the upper end of the bolt-opening is equal to or greater than the upper Aend of the bolt, so that the head of thel bolt is sunk some distance beneath the upper end of the center piece, but is prevented. from being drawn through the lower end of the bolt-opening.

Having thus described Inv invention, what l. claim, and desire to secure by Letters Patent, is

A high-potential insulator having a center piece of porcelain formed with a central tapering opening which is smaller at the bottom than at' the top, in combination with a tapering bolt in the opening and having its upper end smaller than the upper end, but larger -than the lower end of said opening, whereby the ,bolt is removable from one end only of the opening and wedges in the .opposite end.

In witness whereof l have hereunto set iny hand this 5th day of March, 1903.

FRED M. LOCKEv Witnesses:

MILDRED M. Nori, HOWARD P. DENIsoN.

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