US139504A - Improvement in lamp-posts - Google Patents

Description

UNITED' STA-res IMPROVEMENT in 'iAMptpogj-S, n

Specification forming part of Letters Patent No. 139,504', dated June 3,1873;` app1icationitiled' f i i. October1,1872.

larnppost, iu part, constructed in accordance with my invention. l

This invention relates to lamp-posts for street use and other purposes o rplaces in which the post is composed of a main body or base part having an extension or trunk which rims down into the ground, and upper portion usually made separate from the main body. Ordinarily the trunk or lower extension of the main body of the post is cast in common or of one piece with said body. Thi; not only makes the structure heavy to handle by reason of the weight ofthe two parts in a single casting, but the post after 'erection is very liable to fracture from a variety of causes at thel junction of the main body or base-piece with the trunk or lower extension, said junction being where the post rests upon the pavement oris level with the upper surface of the ground. In such case, the breaking of the post at the place indicated entails loss of the whole casting. My invention obviates this; and consists in the construction of the post in sectionsthat is, not only the upper part made separate from the base portion or main body substantially as referred to and described in Letters Patent, No. 121,165, issued to me November 2l, 1871, but also the latter and its trunk or lower extension constructed separate one from the other, and tted together by an upperinternal ange' in the base piece arranged to receive a tapering upper-stem portion of the trunk orlower extension, and the latter being secured below by wedges interposed between the bottom ofthe base piece and trunk-whereby the lamp-post is sti'encd at its level with or in proximity to the ground; and in case of fracture at such point but one of said parts requires to be removed. Furthermore, the disconnection of the fractured piece may readily be made by simply knocking out one or more of the wedges, and a new casting be as readily replaced, and the pf `ist, when its several parts are litted together', beingiriner than if it were made of a single casting.

In the accompanying drawing, A represents the main body or base pieceof the posa-the upper portion ot' which is constructed, substantially ange of the base-piece A and stein of the' upper piece B, to obtain a vertical adjustment of the latter piece in themain .body or basepiece. C is the trunkorlowerfextension of the 'main body A, said trunk entering the ground below the pavement and having the usual base-flange and slots in its sidesltogive it a steady seat and provide for the introduction of the gaspipe.` Instead `of `casting this trunk, however, in one piece with the `main body, as has been the custom heretofore, I

make it like the upper part B, separate and distinct from the :nain body A, and construct the latter with a supplemental internal entire or divided flange, j', at any desired distance from the bottom external liange g, which rests upon the pavement or upper surface of the ground; and further construct the upper portion of the trunk C with a tapering extension, @arranged to snugly [it or Wedge itself within tle internal llangef, but offless diameter than the interior ofthe lower end of the main body A, in order that wedges 'i may be inserted within the external `flange portion g, or, in

`other words, between the lower end of the main body and sides of the tapering extension h, to obtain a vertical adjustment of the trunk Q and main body A, and, in connection with the internal flange j', to hold said two parts of the post tirmly together. Y

By this separate construction and mode of unit-ing the main body andtrunk of the post, the latter is generally sti'ened and strength, ened, and in case of fracture at or near the root of the main' body, only one part of the post will require tobe renewed, By the divis.- ion of the post, too, the handling of any excessive Weight' is avoided, and a lamp-post made up of three parts, united as described, is not liable to disturbance of its perpendicularity of one part Without the Whole. The

Weight of the base part A, and upper part, B,

is, by the arrangement of the ange f, taperi ing portion h of the trunk, and wedges i, made to directly contribute to the firm or solid union of the separately constructed main body A and trunk C.

L. A. GOUCH.

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