US1152606A - Deformed reinforcing-bar. - Google Patents

Description

W. A. COLLINGS.

' DEFORMED REINFORCING BAR.

AIPL1CATION FILED FEB. 24, 1914.

Patented Sept. 7, 1915.

- dent of the city of Kansas City, in the Fatate I tit complicated manipulations through an intricate number of rolls of arn WILLIAM A. CQLLT'NGS, OF KANSAS CKTY, MISSOTJ'ET;

I 'lDEF-QLRMED HEINFQlltCTNG-BAR.

Specification of Letters lat'ent.

Patented dept. t, 11915.

Application filed February or, 191 ficrial N0. [320,ll5'2.

To all whom, it may concern Be it known that l, WILIMM A. Continue, a citizen of the United States, and a resi of Missouri, have invented certain new and usefullmprovemcnts in Deformed, Heinforcing-Bars;- and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, and to the numerals of reference marked thereon, which form a part of this specification.

It is a well known fact that although con crete acts admirably under compression, that it is very liable to fail under tension. Ac cordingly, 'he'concrete is usually reinforced by steel reinforcing members disposed below the neutral axis in a beam or the like, so that said members receive the tension to which the lower layers of concrete are subjected. It has been foun'i, however, that even with reinforcmg members, a beam is liable to failure, owing to the fact that reinforcing elements which are improperly formed may slip in the concrete and may even, due-to their configuration, promote a cracking thereof, which'is, of course, dan' gerous and undesirable.

This invention relates ing bar which to a steel reinforcrelative one another along the ban The bar disclosed in my invention is readily formed between rolls for the purpose and does not necessitate a construction involving of the bar length of the one configuration, but only requires the use of simple types of rolls, permitting easy and cheap manufacture of the bar.

it is an ob ect of this invention to pro-- vide a reinforclngbar of circular cross-section, though not necessarily so, and with ribs integrally formed on portions of the periphery thereof and in oflfset relation with one another.

lit is also an object of this invention to construct a device adapted to effectively bond in the concrete, andadording rounded surfaces at the points of contact therewith except at the extreme ends of the deforming, elements formed on the bar.

It is further an object of this invention to construct a reinforcing bar wherein ribs are helically disposed on the periphery thereof has integrally formed thereon helically disposed rounded ribs staggered with an end of each of said ribs affording a flat contact surface to bond in the concrete to insure a fixed position of the bar therein and to prevent rotation thereof even in slight amounts.

ft is finally an object of this invention to construct a reinforcing bar having ribs helically disposed thereon so as to prevent sliding or rotational movement of said bar in the concrete.

The invention (in a preferred form) is hereinafter more fully defined and described. in the fication. v

In the drawings: Figure 1. is a top plan view of a portion of a reinforcing bar with the ribs shown diagrammatically or straight thereon. Figjjris aside elevation of a portion of a bar showing the ribs in their true helical position upon the-bar. Fig. 3 is a section on line 3-3, of Fig. 2. Fig.- 4 is a fragmentary section on line H of Fig. 3.

As shown in the drawings: The bar itself, which is conventionally shown as of circular cross section, is denoted by the reference numeral 1, and during the process ofrolling the-same is formed with the various helically disposed ribs 2, and 3, respectively on its pcriphery.. It is to be noted that each of said ribs has a fiat surface f, forming the termination of one end thereon and that said flat surfaces are in line with one another longitudinally of the bar and substantially at right angles to the surface thereof. As

already stated, it has been found very diificult to roll certain reinforcing bars for the faces of'the'ends of the ribs formed on the bar in my invention represents the parting line of the rails, and it is readily evident that the forming or rolling operation is not only.

practical, but exceedingly simple to perform,

thus chcap'ening the cost of manufacture of the device. It is to be further noted that the ribs :2, extend for substantially a quarter of the circumference around the bar,' andare helically in line with one another. 'i' H p The ribs 3, are semrclrcumfe'rentlal with respect to the bar and, of course, are helicall y disposed thereon. The adjacent ends of the respective ribs 2, terminate in a rounded contour as denoted by the reference numeral 5, so that thus a rib is afiorded havdi'cular to the surface of the bar; andthe ing one end flat and substantially perpenother end tapered and rounded off relative thereto. The rounded ends 5, on certain: of the ribs, afford a smooth and easily bondedsurface on the bar, while the helical disposition of the ribs prevent a rotation of the bar when embedded in the concrete and the.

saine are further prevented from rotation by the'fi'at abutting surfaces 4.

I am aware that various details of construction may be varied through a wide range without departing from the principles of'this invention. I therefore do not purpose limiting the patent otherwise than necessitated by the prior art. I claim as my invention:

In a device ofthe class described, a bar,

v WILLIAM A. COLLINGS.

Witnesses:

CHARLES W. 'HiLLs, Jr., FRANK K. HUDSON;

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