US1695458A

US1695458A - Insulator

Info

Publication number: US1695458A
Application number: US611132A
Authority: US
Inventors: Walter T Goddard
Original assignee: LOCKE INSULATOR CORP
Current assignee: LOCKE INSULATOR Corp
Priority date: 1923-01-06
Filing date: 1923-01-06
Publication date: 1928-12-18
Anticipated expiration: 1945-12-18

Description

Dec. '18, "1928. 1,695,458

w. T. GQDDARD INSULATOR Filed Jan. 6, 1923 '2 Sheets-Sheet l Patented Dec. 18, 1928.

UNITED STATES PATENT OFFICE.

wimma r. comma, or summon, ouranro, cannon, ASSIGNOR T0 LOCKE msnm'roa conronnrron, or summons, MARYLAND, a CORPORATION or MARY- LAND.

INSUMTOB.

Application flied January 6, 192:. Serial 1%. 611,132.

The invention relates to insulators, and more particularly to means for connecting the parts of an insulating member to each other, and to the method of applying said means. To this end the princi al ob ect of the invention, generally state consists in providing a metallic connecting member adapted to be interposed between adjacent surfaces of an insulator, said connecting member being adapted to form a rigid bond between the adjacent surfaces.

Another object of the invention consists in providing a bonding member for connecting parts of an insulator, said bonding member bein unaffected by exposure to atmospheric con itions and being adapted to be inserted into and removed from between the adjacent surfaces without detriment to the letter or to the adjacent members.

Another object of the invention consists in connecting adjacent surfaces \of-an insulator by interposing therebetween a series of metallic units. b v

A still further-object of the invention consists in the method of connecting adjacent surfaces of an insulator by pouring there-' between spaced bands, strips or sections of a molten metal.

There are other objects of the invention, as will hereinafter be set forth in the detailed description of the insulator and the method of connecting the same, which I haveiliustrated in the accompanying drawing forming a part of this application.

In the drawings,-

Figure 1 is a view, partially in section and partially in side elevation, of a multiple unit insulator of the pin type, showing the invention applied thereto. Figure 2 is atransverse horizontal-sections view taken on the line 22'of Fig. 1.

Figures 3 and 4-are fragmentary sectional views showing on a somewhat larger scale the method of connecting insulating units.

Figure 5 is a view, partially inventical section and partial in side-elevation, of a'conventional type 0 suspension insulator showing the parts thereof connected by the method which I have devised.

Figure 6 is a transverse horizontal sectional view taken on the line 6-6 of Fig. 5.

Figure 7 is a top planview of the cap -illustrated in Fig. 5.

Figure 8 is a fragmentary View, partially I lVithin the cavity 4 is the capor stem 5 of the base or co-actin unit of the insulator. It is to be understoo that While I have illustrated a two unit pin type insulator, the invention is not to be construed as being limited tothis only since it will be apparent from the detailed description of the-invention that it is equally applicable to various other forms of insulators.

To connect the units 1 and 5, I preferably form on the connected surfaces thereof roughened or corrugatedportions 6, these portions being arranged opposite eachother when the insulating units are assembled. The stem 5 of the base member is of less diameter than the diameterofthe recess 4 so that when the parts are assembled they will be spacedapart, as shown in tlie drawings. I interpose between the units a washer 'or spacing member 7 which .is preferably formed of felt, asbestos, or like material. This spacing member overlies the head5 of the base unit and is preferably formed with a series of notches or recesses 8 opening from the peripheral edge thereof, the peripheral edgeof the spacing member 7 terminating preferably at a point Within the recess 4. V b

When the arts are assembled as shown in Fig. 1, the insulator is inverted anda molten metallicsubstance 9, preferably lead or an alloy thereof, is poured within the recess 8 of the spacing member or washer 7. It will be obvious that the size and spacing of the molten alloy connecting strips determined by the size and spacing of the notches or recesses 8 within the washer or spacing member 7 and may be arranged or altered ing a downwardly opening recess 11 and upwardly projecting perforated cars 12, the latter providing means for connecting the cap to an adjacent insulator or to a euppo t as the case may he. The recess 11 is ad; tried to receive the neck or stem 13 formed on and projecting from the upper face of the insulating unit 1%. The unit is likewise provided with a centrally arranged downwardly opening cavity or recess 15 in which received the stem 16 of the eye-bolt The inner wall of the recess 11 is preferably corrugated as shown at 18 and the vertical surface of the necl: or stem 13 is roughened preferably by the so-called sanded process. This process consists in applying to the neck or stem a sand formed by granulating tired porcelain waich adheres to the freshly glazed surface of the stem and which is fused to the stem upon the filll v of the insulator.

The method of connecting the cap 10 to the stem 13 is as follows: Seated within the cap is a felt or asbestos washer or pad 19 which is preferably providen with a series of spaced fingers 20 which may correspond in length with the depth of the cap. This washer is positioned within the cap so that the openings between the fingers 20 thereof are in alinement with the openings provided in the upper face of the cap, as clearly shown in Fig. 7. The cap is then placed over the neck or stem until the washer 119 is in contact with the top of the stem 13 and molten metal, as hereinbefore described, is then poured through the openings 21 so that the molten metal on solidifying forms a firm bond, as indicated at 9, between the cap and the stem.

A like method is employed to connect the eye-bolt 1'? within the recess 15. The vertical wall of the recess is provided with a roughened or sanded surface and a washer l9 having a plurality of fingers 20" is seated within the recess 15, preferably by assembling the washer and eye-bolt and forcing the assembled washer and eve-bolt into proper position. The spaces between the fingers 20* are then filled with the molten metal or alloy and the latter on solidifying forms a firm bond between the stem 16 of the eye-bolt and the adjacent walls of the recess 15, the corrugations 22 on the stem 16 of the eye-bolt materially improving the grip between the alloy and the eye-bolt.

In Fig. 8 I have illustrated a fragn'lentary portion of a post or column insulator having a metallic base member 28 on the up surface of which is provided a circular flange 2% within which is adapted to seat the lose 25 of the post insulator 26. The latter is preferably provided with a corrugated sur face. as shown at 27, to increase the le, lz-age distance and may have the base portion 25 thereof sanded so a to form a roughened surface, as hereinbefore described. To connect the insulator 26 to the base member 23 I interpose between the inner wall of the flange 2i and the circumference of the base a strip or spacing member preferably composed of felt or asbestos or like material, as ilhistratcd at The said strip is preferably formed with a series of spaced upstanding "'L'IS or tongues and the spaces between the a d tongues 29 are then filled with a molmctal or alloy which on solidifying forms a rigid bond serving to firmly connect the insulator to the base member. If desired the inner wall of the flange 2% may be ccrrugated or roughened as shown at 30.

'llhroughout all of the devices illustrated the molten metal on hardening inter-lochingly connects the adjacent surfaces between which it is interposed. against separation. The shrinkage of the metal on com from its molten stage provides suliicicnt clearance between the adjacent surfaces to compensate for the thermal changes in the latter, and therefore does not subject these surfaces to excessive strains. In this connection it might be pointed out that a metal connecting member being a good conductor of heat serves to equalize the temperatures of the adjacent surfaces.

Another great advantage of the method of connecting insulators as shown and described herein resides in the ease by which these units may be disassembled if desired. By .lI1ll1'l(f!'S ing the connected units in a bath of oil whose temperature is above the melting point of the metallic bond, or by subjecting the units to this temperature, which temperature is not dctrin'iental to the material forming the parts of the insulator, I am enabled to melt the bond and hence may disconnect the units without detriment to the latter.

By spacing the parts of the connecting metal apart, that is, by utilizing a series of spaced strips, bands or segments, I am on abled to use as the connecting medium a metal or alloy whose melting point is comparatively high, such, for instance, as lead, which cheap and which, on cooling. forms a bond having the requisite tensile strength to satisfactorily perform the functions required. Another result of the spacing of these units resides in the fact that no detrimental heating elfects are produced even when a metal having a relatively high melting point is used as the connecting medium since by interrupting the continuity of the metal by felt strips or the like the detrimental heating elleets of a large body of metal at a high temperature is avoided.

Having now described the invention, what I claim and desire to secure by Letters Patent is 1. The method of connecting an insulating unit to an adjacent member which consis s in assembling said unit and said member in nested relation with spacing means thereloo between, and finally connecting adjacent surfaces of said unit and member at spaced intervals by pouring molten metal therebetween.

2. The method of connecting parts of a multiple unit insulator which consists in providing adjacent surfaces of said parts with rou hened ortions assemblin said surfaces in nested relation with a spacing device therebetween leaving spaced pockets between the parts, and finally connecting the adjacent surfaces at spaced intervals by pouring molten metal into said pockets.

3. The method of connecting parts of a multiple part insulator which consists in forming a cavity in one of said parts, forming a neck or stem on another of said parts, roughening portions of the surface of said cavity and said stem, assembling said parts by inserting the said stem within the said cavity, spacing means being employed for dividing the cavity between the parts into a series of pockets and finally connecting the roughened portions of said adjacent surfaces at spaced intervals by pouring a molten metallic alloy in said pockets.

4. The method of connecting units of a multiple part insulator which consists in forming a cavity in one of said parts and forming a stem on another of said parts, said stem and cavity being adapted to be assembled in nested relation, applying a spacing member between said units, and finally connecting adjacent portions of said surfaces by pouring therebetween a metallic alloy in a molten state.

5. The method of uniting porcelain insulator sections comprising arranging the sec-- tions in nested relation with a circumferential space between them, obstructing the spaces at intervals between the sections, and filling said spaces with molten metal, contiguous portions of the sections having roughened surfaces providing a grip for the metal.

In testimony whereof I afiix my signature.

WALTER T. GODDARD.