US1288763A - Deformed bar. - Google Patents

Description

CLAUDE A. ".P. TURNER, OF MINNEAPOLIS, MINNESGTA.

DEFORMED aan.

Application led July 2, 1918.

To au vwhom t may concern:

Beit known that I, CLAUDE A. P. TUR- Nnu, a citizen of the'United Stat-es, residing in the city of Minneapolis, in the county of Hennepin, in the State of Minnesota, have invented certain new and useful Improvements in Deformed Bars, and have de' scribed the same in the following specification, illustrated bythe accompanying drawings.

My invention relates to that class of deformed bars which are commonly used for reinforcement of concrete constructiomand which are individually provided with a plurality of projections, surface irregularities. or socalled deformations` for the purpose of increasing themechanical bond resistance operatively occurring between thel bar and the concrete in which it is embedded. It is the main object of the invention to facilitate the formative process of rolling` a bar of this class; to avoid reducing the strength of the bar in its final pass between the rollers. and to provide the barvvith all necessary or desirable deformations without producing thereby any avoidable reduction of its strength; to distribute the mechanical bond resistance of the deformations uniformly around 'the body of the barz' at the same time to adapt the completed bar to be bended, as use may require` in either or both of two planes, at right angles with each other, without any interference between the deformations and the bending rolls; and in gen-f eral to produce a" deformed bar of simple design and easy construction, and of superior convenience and eiiciency. To accomplish these. objects I incorporate in my improved bar, as parts thereof, a c vlindrically round bar body and a plurality of spaced projecting ribs, formed integrally therewith, which have a special form, a special individual arrangement and a special distribution upon the round body.

In said drawings, illustrating the best manner in Which I have contemplated applying the principles of the invention ,`Fig ure 1 is a side elevation of a specimen por- .tionof a deformed bar which is consti-noted in accordance with 'these principles. Fig. Q is a cross-section of the same bar on the section line 2-2 of Fig. l. Fig. 3 is a side elevation of Athe same portion of the same bar rotated in the direction ofthe arrow in Fig 2V throughan angle of forty-five de, `.O frees from the position shown in that gure.

Specification of Letters Patent.

Patented Dec. 24, 1918.

Serial No. 243,000.

Fig. 4 is a cross-section on the section line e-i of F ig. 3. Fig. 5 is a partial axial section of the same bar.

In the illustrated specimen of inyvinvention the body of the bar is a straight round rod, denoted by the numeral 6. It is of any desired or predetermined length, and is pro vided with a plurality of ribs, 7, 8, 9, 10, formed integrally therewith and thereon by the operation of formatively compressing the rod between rolls. in side elevation the form of a crescent, as shown in' Figs. :Z and e; and in cross section resembles a truncated screw-thread, as shown in Fig." 5. These ribs are individually disposed in circumferential directions on the periphery of the bar body, and are uniformly spaced apart in four separated series extending lengthwise of the bar. andcomprising the ribs T. 8, 9 and l0 respectively. Each series forms part of a single sector of the bar, and each ribspans an arc of approximately sixty, and not more than ninety. degrees of such sector; so that in an end elevation of the described 'bar all the ribs are seen to lie within a circumscribed square i whose sides are tangent to the body (S. The

ribsef each sector are spaced uniformly apart a distance preferably exceeding the diameter of the bar; those of diametrically opposite sectors are directly opposite: and those 4of adjacent sectors are iu relatively staggered positions, as show-'11.

As the ribs are distributed uniformly around the body of the bar. the hond resistance referred lto is operatively distrib uated in the same manner; as the individual ribs lie eircumferentially and not lengthwise of the bar, they are neither weakened nor ruptured by longitudinal tension or compression when the bar is bent; and, as the deformations lie Within said circumscribed square, the bar can be passed between bending rolls without either choking the rolls orflattening out the ribs, and can be bended in either of two rectangularly intersecting planes with equal smoothness and Asame size and shape and being small in Each of these ribs has sov with respect to the ribs in any adjacent row und each rib being One of a pair of diametrienlly opposite ribs, whereby the mechanienl bond of the Concrete to the beii will 10 be equally distributed and the bar may be.

bent in two directions at right angles Without interference with` the ribs.

fitness my s'` mature at Minneapolis, Minnesota, Junel1 1918. CLAUDETA.- P. TURNER.

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