US710880A - Corner-strip. - Google Patents

Description

Patented Oct. 7, I902.

W. N. McDONALD.

V CORNER STRIP. (Application filed Dec. 4, 1901.)

(N0 Model.)

I TEES Cl, FHUYOLITNOU WASHINGYON. D. C.

Grains.

\VILLIAM N. MCDONALD, OF HAVANA, CUBA.

SEEGEEXQATZON forming part of Letters Patent No. 710,880, dated October 7, 1902.

Application filed December 4,1901. Serial llo. 84,702. (N0 model-1 To all ZU7L077'L it Hut/j concern:

Be it known that 1, WILLIAM N. McDon- ALD, a citizen of the United States, residing at Havana, in the Island of Cuba, have in vented a new and useful Improvement in Corner-Strips, of which the following is a specification.

My invention relates to an improvement in corner-strips for protecting and ornamenting concrete or mortar against abrasion or grinding, and it is designed that it shall be applicable to use in protecting Stairways, bridgecopings, corners of abutments, door-jambs, and, in fact, all corners of concrete or monolithic structures which are to be guarded and protected from breaking.

iVith the foregoing objects in view my invention consists in certain novel features of construction and combinations of parts,which will be hereinafter described, and pointed out in the claims.

In the accompanying drawings, Figures 1 and 2 show side elevations of slightly-modified forms of protectingstrips. Fig. 3 is a cross-section. Fig. i is a view of a flight of stairs, showing several slight modifications of the invention; and Fig. 5 is a similar view on a somewhat-enlarged scale, showing the application of the improvement to a curb and gutter.

The essential features comprise the outer strip A, which may be in any form and ornamented, if desired, and the bonding portion B, integral therewith or secured thereto. The protecting-strip may be made in a variety of shapes, as indicated in the drawings, and it might be rolled or cast in still other forms. The outer surface is adapted to protect the corner to which it is applied and it forms the outer surface of that portion to which it is applied. Its edges terminate or are embedded in or lie flush with the concrete or mortar, so that the outer surface of the protecting-strip forms a continuation thereof. The bonding portion or shank is likewise subject to indefinite variations. Two forms only are shown, one in Fig. 1 and another in'Fig. 2. In Fig. 1 it is in the form In this rib openings 1 1 are formed, thereby leaving intervening undercut or dovetailed projections 2 2, which latter are embedded in the concrete or mortar, so that the protecting-strip is securely anchored in place against the possibility of accidental displacement, in that way strengthening the structure itself and protecting the projecting corner against abrasion. In the other form shown the rib is modified into the form of a series or plurality of undercut or dovetailed projections 3 3, which, like the projections 2 2 of the other form above described, are sunk or embedded in the concrete or mortar, where they are securely held by virtue of their dovetailed formation against removal unless the masonry itself is torn away.

In Figs. at and 5, while all of the essential elements above described are adhered to strictly, a variety of slight modifications are illustrated, the bonding device in most instances being a continuation of one edge of the protectingstrip.

The foregoing invention has been tested sufficiently to demonstrate its thorough practicability. Besides its efficiency it has the merit of economical construction.

It is evident that other slight changes hesides those shown and described might be resorted to in the form and arrangement of the essentials of the invention without departing from the spirit and scope of my invention, and hence Ido not wish to limit myself to the exact constructions herein set forth; but,

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

1. A corner-strip consisting of a bar of metal punched or cut into shape, and comprising an outer facing-strip of substantial breadth adapted to cover an area upon one or both sides of the angle of the corner to be protected, and a bonding device constructed and adapted to be embedded in a body of concrete or mortar or masonry to be protected, said bonding portion being undercut or dovetailed form, largest at the end remote from the surface plate or strip whereby to insure its permanent anchorage in the masonry.

2. A corner-strip comprising an outerbody portion having a straight or approximately straight inner surface and a curved outer surface with a shank which extends at right specification in the presence of two subscribangles to the inner surface, said shank coming witnesses. v prisin a, plurality of undercut members with s i iitable spaces between them whereby WILLIAM MCDONALD 5 a secure anchorage in the body of cement is Witnesses:

efiected. FERD. BONSTEDT,

In testimony whereof I have signed this T. M. KEENE.

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