US404232A - Pole for electric wires - Google Patents

Description

(No Model.)

U. SNEAD. POLE FOR ELECTRIC WIRES.

No. 404,232. Patented May 28, 1889.

@Q'vtmesoeo W {7140mm UooLPHo SNEAD UNITED STATES PATENT OFFICE.

U DOLPIIO SNEAD, OF LOUISVILLE, KENTUCKY.

POLE FOR ELECTRIC WIRES.

SPECIFICATION forming part of Letters Patent No. 404,232, dated May 28, 1889.

Application filed January 28, 1889. Serial No. 297,892. (No model.)

To all whom it may concern.

Be it known that I, UDOLPHO SNEAD, a citizen of the United States, residing at Louisville, in the county of Jefferson and State of Kentucky, have invented certain new and useful Improvements in Poles for Electric Wires; and 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 and use the same.

My invention relates to the construction of iron supports for the connecting-wires of electric apparatnssuch as telegraphs, electric lights, and telephonesand for analogous purposes-such as flag-staits and the like and its object is to give durability and sightliness combined with strength and lightness. To this end I construct my improved pole of a cast-iron base, an open wrought-iron column, and a cast or malleable iron top, as hereinafter described.

In the drawings, in which like letters indi cate like parts, Figure 1 is a front elevation of a form of my improved pole in which the wrought-iron portion is composed of two channel-irons. Fig. 2 is a section of the same through the line a a. Fig. 3 is a section of the same through theline Z) I). Fig. 4 is a side elevation of the same. Fig. 5 is an elevation of a form of my improved pole in which the wrought-iron portion is composed of four iron rods and the cast-iron base is cylindrical. Fig. 0 is a section of the same through the line 0 c. Fig. 7 is an enlarged view of the top, with cross-piece carrying insulated connections for the wires and a ratchet, pawl, and drum for tightening the cross-wires of electric railways. Fig. 8 illustrates the insulated bolts r being a rubber sleeve.

A is a cast-iron base, which I prefer to make hollow for lightness and economy, and furnished in the part beneath the surface of the ground with the openings (1, to more securely hold the grouting. This base may be provided with braces 'c to give it greater support, and it is prolonged above the moldiugf, on which the wrought partof the pole rests, and to this eilt-ension the wrought portion is securedas by bein riveted, bol ted, screwed, or the like.

B is the wrought-iron part of my improvement, and is securely fastened to the part g of the base, and is firmlyheld together by the wroughtiron bar 71, which runs in an angular or spiral manner between the bars or rods 4', and is secured to them by the rivetsj. It is obvious that the bars or rods 2' may be of different formsof angle-irons, channel or T irons, or of fiat or round or half-round barsand vary in number and in the form in which they may be set in. the column without affecting the principle of my invention.

C is the top of the pole, which I prefer to make of cast or malleable iron. It carries the cross-piece 7. of any suitable material, to support the insulators Z, and is provided with the drum and ratchet m and the pawl 01, for tightening the cross-wires in electric railways, the insulators Z being intended for the support of electric wires extended on the poles. The top C is also furnished with the flanges 0, which rest on the insulating material, q, and are connected, by means of insulated bolts'r, with the plate 1), which covers the wrought part B of the pole.

I propose to use wood or rubber for the insulating material, 7, and to insulate the bolts 0' by means of a hard-rubber casing around them with a flange at the top. This complete insulation bet-ween the part B and the top C will completely out elf the electric current from passing down the pole, and thus prevent accidents. The top may be con structed of such dimensions as to acconnnodate any desired number of cross-pieces and insulators for additional wires.

The advantages of my invention are that the lower part, being of cast-iron, has great stiffness at the place where it is most needed, where it enters the ground, is of better material for receiving the grouting, thereby rendering the pole more stable, and is not liable to decay from rust, as wrought-iron is. The wrought-iron or upper part combines great lightness with great strength, is more sightly than a solid pole, and makes the pole easily accessible for painting in all its parts, for repairs, and for the placing and arrangement of the wires.

Having fully described my invention, what I claim therein as new, and desire to secure by Letters Patent, is

1. A support for electric wires, composed of a cast-iron base, an open wrought-iron upper part, and a completely insulated top oarrying insulators for such wires, and provided -wit11 means for tightening cross-Wires, substantially as and for the purpose set forth.

2. A support for electric wires, composed of a cast-iron base, an open wrought-iron upper part, and a completely-insulated top pro- IO vided with means for tightening cross-wires,

substantially as and for the purpose set forth.

3. In a support for electric wires, the combination of a cast-iron base and an upper part of wrought-iron composed of upright 15 bars or rods connected by a bar running bar running angularly or spirally between them, and a top part completely insulated, substantially as and for the purpose set forth.

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

UDOLPI-IO SNEAD.

"Witnesses:

, ANDW. ELLISON,

J AMES W. BEATTIE.

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