US893265A - Insulator. - Google Patents

Description

No. 893,265. PATENTED JULY 14. .1908. A. RICHARD.

INSULATOR.

APPLICATION FILED MAR. 19 1905.

In en t r Wan A itomeys.

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- AUGUSTO RIcHARn'oF MILAN, ITALY.

msULAtron.

Specification of Letters Patent.

Patented July 14, 1908.

Application filed March, 1905. Serial No. 250,806.

To all whom it may concern:

. Be it known that I, AUGUsTo RICHARD, a citizen of the Republic of Switzerland, residing at 115-117 San Cristoforo, Milan, Italy, have invented certain new and useful Improvements in and Relating to Insulaand I do hereby declare the following to be a full, clear, and exact description of the invention, such; as will enable others skilled in the art to which it appertains to make andjuse the same.

This invention relates to insulators such as are used for high voltage electric power transmission lines and aims at reducing the possibility of grounding the line through reakage or accident to the insulator.

A further aim; of the invention is to produce an insulator composed of two or more separable arts adapted to be interchanged or replaced by duplicate or similar parts.

Besides the electrical properties. exclusively depending upon the material it is made of and the shape chosen, an insulator, in order to give good results, must possess s ecial mechanical qualities on which the urability and exchangeab'ility of the insulator, as well as of the possibility of avoiding contacts, leakages and accidents in the 7 case of breakage, entirely depend.

. independent of each other.

The several pieces which an insulator of a somewhat large size usually consists of,

have been heretofore connected by means mastlcs, and other slmiof molten varnishes,

lar substances. In the case of one part only (usually the upper part) of an insulator getting broken, the-other part was generally injured or was at least not longer available, owing to the adherence of the mastic, therefore the whole insulator had to be renewed.

An insulator made according to the present invention, consists of two or more parts These parts are connected together by means of a detachable mechanical joint (screws and nuts, bayonet joints, grooves and tongues, etc.) Owing to the nature of the materials, (porcelain, glass, earthenware), it is impossible to provide the pieces themselves with nuts and screws exact y fitting into each other; moreover, the brittleness and hardness of such materials would render the direct application of a mechanical union by no means practical. It is therefore necessary in order to overcome these drawbacks, to interpose between theparts to be joined a substance" more elastic and resilient than porcelain,

glass, or earthenware, a substance, namely, susceptible of being shaped into theform of screws, etc., according to the special construction of the insulator.

The accom anying drawings show, by Way of examp e only, Figure 1, an insulator embodying my invention; Fig. 2, the bush ing made of elastic material interposed between the two parts of which the insulator consists; 3, a vertical section of a modification 'on the line "If-LI] of Fig. 4; Fig. 4, a horizontal section thereof on the lines 0cw; and Fig. 5, a sectional view, enlarged, of a portion of the bayonet joint.

In the insulating device the elements A and B, of which the insulator consists, enter each other in a manner analogous to a spigot and faucet, and are connected together by means of screw threaded metallic bushings a, b, (see Fig. 2).

By such an arrangement the elements A and B composing the insulator, are rendered quite independent of one another as the elastic and tough intermediate material prevents anybreakage from extending from one to the other part of the insulator. The bushings are secured in position by means of cement or other material, 0, d. It is moreover possible to change only that element of the insulator, which has been broken, whereby a considerable economy in the maintenance'fof the line is obtained. The bpshings, o1 sockets, a, b, may also-consist 0 etc.) complying with theabove conditions.

They may also consist of fusible mastics or molten metal provided it be possible to cut screw threads therein.

It is not indispensable to interpose two bushings between the elements to be connected. One bushing only may do, either with the male or female member being caused to fit exactly to the screw or nut out into the surface of the porcelain, glass, earthenware, or other material, of which the elements of the insulator are made.

In the modification shown in Figs. 3 to 5, the male member e is in the form of a ring carrying a pin h on opposite sides. These pins engage with slotsf, formed in the ring 9, which constitutes the female member. rings are secured to their respective supportteri Having now'particularly described and ascertained the nature of my said invention,

shown in Fig. 1,

non-metallic substances (leather, wood,

Both,

ing liarts by means of cement or other ma'- and in what manner the same is to be per-. formed,'l declare that what I claim is:

1. An insulator composed of two readily separable elements made of insulating material, of the character of porcelain having co-acting male and female parts provided with interacting fastening devices, substantially as set forth.

2-. In an insulator, the combination of two readily separable elements made of insulating material, of the character of porcelain, one of such elements having a projection entering a socket in the other element, and interacting fastening means carried by the coacting male and female parts of the elements, one of which fastening means being made of a different material from the elements, subst antially as set forth.

3. In an insulator, the combination of two readily separable elements made of insulating material, of the character of porcelain, one element having a projection entering a socket on the other element, and bushings carried by the male and female parts of the elements and provided with interacting fastening means, substantially as set forth. I

4. In an insulator, the combination of two readily separable elements made .of insulating material, of the character of porcelain, one element having a projection entering a socket in the other element, ofmetallic bushings having interacting ried by and secured to parts of the elements, substantially as set forth.

5.' In an insulator, the combination of two readily separable elements made of insulating material, of the character of porcelain, one element having a projection entering a socket in the other element, and screw fastening means care threaded metallic bushings carried by the male and female parts of the elements and cemented thereto, substantially as set forth.

6. In an insulating support, in combination, a plurality of membersformed of nonconducting material, and metallic parts on each of said members co;acting to form are tallic joints, byineans of which said members are detachably connected to each other.

7. In an insulator, in combination, a member composed of non-conducting material, a

the male and female metallic bushing affixed to the underside of said member, a second metallic bushing detachably carried by said first named metallic bushing, and a second insulating member affixed to said second metallic bushing.

In testimony whereof I aflix my signature in presence of two witnesses.

l AUGUSTO RICHARD. Witnesses:

.CARLO SALVOTTI,

MIcnELE DE DRAGO.

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