US412498A - Metal post - Google Patents

Description

(No Model.)

' I O B.;HALL.

METAL POST.

N0. 412,4 98. Y I Patentedflot. 8, 1889.

N. PETERS. Pnolol lfnknphur. wnhmm'u. B.

UNITED STATES PATENT OFFICE.

OSBORN B. HALL, OF MALDEN, MASSACHUSETTS.

METAL POST.

SPECIFICATION forming part of Letters Patent No. 412,498, dated October 8, 1889.

Application filed July 31, 1889- Serial No. 319,295. (No model.)

To all whom it may concern.-

Be it known that I, OSBORN B. HALL, of Malden, in the county of Middlesex and State of Massachusetts, have invented a new and tion of the post shown in Fig. 1 on line X.

their upper end are in like manner secured Fig. 3 shows an enlarged modification of Fig.

1. Fig. 4. is a section taken on line Z, Fig. 3. Fig. 5 is an enlarged sectional elevation showing the upper portion of the post shown in Fig. 1. Fig. 6 is an enlarged section taken on line W, Fig. 1. 1

This invention relates to the metal posts which are placed near the outer edge of the portion of streets that are traveled by vehicles, to support the short wires extended across the street, and upon which the trolleywires, so called, are arranged to conduct an electric current to be utilized in propelling street cars upon tracks beneath the lastnamed wire; and the invention consists in features of novelty, which will, in connection with the drawings, be hereinafter pointed out, and specified in the claims.

Referring again to .the said drawings, A represents a cast-metal base which is inserted in the earth to the extent shown in Fig.1, where B represents the surface of theearth or sidewalk in which the post is placed. From base A rises the single tube or column 0, which terminates at the top in the head (1, oval in plan, and in which are secured by screw-threading the tubes or rods e, the central one of which may, as shown in Fig. 2, be inserted in a hole that communicates directly with the axial passage in tube 0. The upper ends of tubes 6 are screw-threaded in coupling f, in the upper side of which are in like manner secured the tubes or rods g, which at in cap h. The cross-streetwire is shown at k, and in Fig. 1 it isshown as extended from post to post across the street. 7 As a constant tension must be maintained on wires 70, and

as the posts are by the slight yielding of the earth liable to yield laterally under pressure, it is desirable to provide some means to insure such tension upon the wire without the constant care that is now necessary; and to effect such result I interlock between tubes 9 the weight g, to move freely up and down, and I attach the wire to the weight by means of the short interposed section of wire rope, (marked 1,) one end of which is attached to wire 70, and the other to an eye secured to the weight, as shown, said rope passing over truck 41, loosely mounted on pivot j, which is supported in ears or, formed upon coupling h, the pivot being so arranged that the rope above the weight is tangential to the periphery of the truck. Said wire it may be secured to the posts on the opposite side of the street by means of an eye 19, formed in cap h, as shown at the right'in Fig. 1, or in any desired manner. will necessarily be sufficient to hold taut wire is with its maximum load or strain, and as it is always possible that the support of the weight may suddenly give way through defects or breakage in the wire or rope, and as casualties might occur by the falling of the weight to the sidewalk, therefore the interlocking of the weight in tubes 9 is of essential value and importance, as the weight can only fall to coupling f, where it is en-' tirely accessible for replacement in connection with the wire, while if the weight were arranged in a post tubular in its entire length the falling of the weight would place it beyond reach or recovery.

Base A may be formed with the wall I), either with or without the openings 0 through the same, as shown in Figs. 1 and 2; or it may be formed, as shown in Figs. 3 and 4, with a smaller central tube having radial flanges s, which,with the tube, are formed integral with base-plate a, and when so formed the flanges that are in a plane at right angles to the line of strain upon the post through wire 70 should be wider than are the flanges that are in the line of such strain, as the former-mentioned flanges are the principal resistants against deflection of the post from a vertical position.

The column (1, instead of being formed integral with base A and head (1, may be of The avoirdupois of weight g thick wrought-metal pipe dulysecurcd in the base and head,- as shown in Fig. 3.

The advantage gained by forming the lower portion of the post with but a single pipe or column 0 of a height to bring head (1 above the tallest pedestrian (as the column shown in Fig. 1 represents a height of twentyseven feet) is the fact that by so doing the post occupies noniorc of the sidewalk than does the ordinary post, while by forming the upper sections with a plurality of rods or tubes in each section much less metal is required than if the post consisted of a single tube in each section.

I do not claim herein forming metal posts in sections with a plurality of rods or tubes in the same section with couplings to receive the ends of the several sections or groups of pipes, as the pending application, Serial No. 317,893, filed by me July 18, 1889, is for such a post; but

\Vhat I do claim is- 1. A post formed with a suitable base, a single column or tube rising from said base to the requisite height and terminating with a head formed to receive a plurality of rods or tubes, and one or more sections above said head, having a plurality of tubes or rods in each section, substantially as specified.

2. A metal post formed with a suitable base and subdivided into lengths or sections, the lower section being formed of a single tube or column, and the other and upper lengths being formed with a plurality of tubes or rods in each length, said several lengths being coupled together, in manner substantially as specified.

A metal post provided with a sheave or truck, pivoted and arranged in manner substantially as specified, and a weight arranged in and to be guided and supported by the post and to coact with said sheave, substantially in manner as specified.

OSBORN l3. HALL.

\Vitnesses:

T. W. PORTER, EUGENE IIUMPHREY.

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