US1423163A

US1423163A - John thomas simpson

Info

Publication number: US1423163A
Authority: US
Publication date: 1922-07-18
Anticipated expiration: 1939-07-18

Description

3-. T. SIMPSON.

DEFDRMED- REENFORCING BAR.

APPLICATION FILED 020.213.1920,

Patented July '18, 1922.v

uNiTEn stares rarest caries.

JOHN THOMAS sIMrsou, or NEWARK, new JEnsnY.

DEFORMED REENFORCING BAR.

To all whom it may concern.

Be it known that I, J OHN THOMAS Sun soN, a citizen of the United Statesand a resident of Newark, in the county of Essex and State of New Jersey, have invented a certain new and; useful Deformed Reenforcing Bar, of which the following is a specification. I 1

The invention relates to reenforcing bars adapted to be embedded in concrete whereby the resulting structure will be strengthened, as is well known in the reenforced concrete art.

The object of the invention is to. produce a deformed reenforcing bar which will be of uniform cross section whereby the strength thereof will not vary at different points on the bar.

A further object isto so proportion and arrange the deformations that the bar when embedded in a matrix will be prevented from longitudinal movement due to thrust, expansion or contraction in either direction.

A further object'of the invention is to produce such a bar, which is capableof being rolled, and therefore cheap of construction.

These and further objects will more fully appear in the following specification and claims, and in the accompanying drawings, considered together or separately.

One embodiment of the invention is illustrated in the accompanying drawings, in which like parts in each of the several figures are designated by similar characters. of references, and in which-- c Fig. I is a side "elevation of a 'reenforoing bar deformed in accordance with the invention. Y r

Fig. 2 is a'se'ction on the line 2-2 of Fig. 1.

Fig. 3 is a similar View of a modification, and

Fig. 4: isiai side elevation of a further modification.

In the embodiment of the the invention illustratedin Fig-s1 andjQ, Ldesignates reenforcing bar, preferably of rectangular cross section, provided' onitssides with deformations.- The deformations, are preferably on all of the four sides of the bar and consist of portions raised above the major portions of the plane surfaces thereof.

The deformations are in the form of three Specification of LettersP-atent.

Patented July 18, 1922.

Application filed December 28, 1920. Serial No. 433,625.

pointed stars each having one of its salients 2 longer than the others and extending longitudinally of the bar, and in the center line of the side. The salients of each star are preferably triangular in cross section with the altitude perpendicular to the plane of the surface'of the bar, and the sides thereof are at angles slightly less than 45.

' The starsare arranged in two series a. and

:6, those of thefseries at having the salient 2 aside will be opposed to the short salients" of the next adjacent star, the extremities of the salient of adjacent stars being spaced apart. a

Each star of each series is opposite one of the other series in the opposite side of the barand said opposed stars have their salients 2 extending in opposite directions as shown. 1

Instead of-making the bar rectangular, as above described, it may be made of any other desired cross section, and in Fig. 3

a bar 4 of circular cross section is shown.

The deformations 5 are proportioned and arranged as inFig. 1, but instead of'being angular are of curved cross section.

in Fig. 4 is illustrated an arrangement in' which the deformations are in the form of symmetrical stars 6 arranged in a single series spirally around the bar. Being in a single seriesthere is no star opposite another. 7

The longitudinally alined stars on each plane side ofthe bar are so arranged that a re entrant angle 7 of each star is opposed to an opposite reentrant angle 8 of each adjacent star whereby a pocket is formed between each pair of stars, and said pockets are of the pockets being opposed.

The stars may be of forms other than those shown, it being understood that when unsymmetrical stars are employed they will be arranged as shown in Fig.- 1 whereby thoseofoneseries will form reentrant angles to prevent movement of the bar in one partially and angularly "enclosed by the salients of the stars the angular boundaries direction, While those of the other series will form oppositely disposed reentrant angles to prevent movement in the opposite direction.

lVhen symmetrical stars areemployed each deformation will present reentrant angles to prevent movement of the bar in either direction.

In all cases the deformations are so arranged relatively to each other in the longitudinal dimension of the bar that the cross sectional area thereof will be equal at all points.

When the bar of Figs. 1, '2 and 3 is embedded in concrete the pockets between the reentrant angles a and b will of course be filled and when the concrete sets the Walls a will prevent movement of the bar relatively-to the concrete in one direction, and the Walls 6 Will prevent movement in the opposite direction.

lVhen symmetrical deformations are em ployed each projecting portion of the bar, that is each star, will act to prevent movementof the bar in either direction.

It is to be understood that-the invention is not limited to forming the distortions on diametricallyopposite sides of the bar, nor on all of the sides of a bar of angular cross section. An angular bar may have the distortionson any or all of its sides, or a nonangular bar may have them arranged in any number of longitudinal lines.

The distortions need not be so disposed relatively to each other that the cross sectional area of the bar, as a Whole, will be uniform although such a construction is desirable and preferred.

In accordance with the provisions of the patent statutes. the principle of the invention has been described,together With What is now considered to be the best embodiment thereof, but it is desired to have it understood that the example given is merely illustrative, and that the invention may be carried out .in other Ways.

The invention having been describechwhat isclaimed and desired to be secured by Letters Patent is as. follows:

1. An article of the character described, comprising an elongated body, a plurality of protuberances on the body, each protuberance having at least three salients extending parallel to the plane-of the surface of the body, one at leastof said salients extending longitudinally in :the plane of the axis of the body, and one at least of the reentrant angles of the protuberance having each of its sides at an acute angle to the longitudinal axis of the body.

2. An article of the character described, omprising an elongated body, a plurality of protuberances on the body, each protuben ance having at least three salients extending parallel to the plane of the surface of the body, one at least of said salients extending hmgitiu'linally in the plane of the axis of thebody, and one at least of the reentrant angles of the protuberance having each of its sides at an acute angle to longitudinal axis of the body, the reentrant angle of one protuberancebeing opposed to tlie reentrant angle to the next adjacent protuberance.

An article of the character described, comprising an elongated body, a plurality of protuberances on the body, each protuberance consisting of an unsymmetrical threepointed star, one of the salientsof the star extending longitudinally of the body, the other salients extending at acute angles relatively to the axis of the body, the stars being so arranged and disposed that the angular salients of one star are opposed to the angular salients of the next adjoining star, at one side thereof, and the longitudinal salient of said star being opposed to the similar salient of the next star on the opposite side thereof.

4:. An article of the character described, comprising an elongated body, a plurality of protuberances on the body, each protuberance consisting of an unsymmetrical threepointed star, one of the salients of the star extending longitudinally of the body, the other salients extending at acute angles relatively to the axis of the body, the stars being so arranged and disposed that the angular salients of one star are opposed to the angular salients of the next adjoining star at one side thereof, and the longitudinal salient of said star being opposed to the similar salient of the next star on the opposite side thereof, all of the salients being triangular in cross section.

5. An article of the character described, con'iprising an elongated body, a plurality of protuberances on the body, each protubel ance consisting of an unsymmetrical threepointed star, one of the salients of the star extending longitudinally of the body, said salient being longer than the other salients of the star, the other salients extending .at acute angles relatively to the axis of the body, the stars being so arranged and disposed that the angular salients of one star are opposed to the angular salients of the next adjoining star at one side thereof, and the longitudinal salient of said star being opposed to its similar salient of the next star on the opposite side thereof, all of the salients being triangular in cross section.

6. A device of the character described, comprising an elongated body, four sets of equally spaced protuberances arranged longitudinally of the body, those of one set being diametrically opposite a set on the opposite side of the body, each protuberance being in the form of an unsymmetrical three-pointed star, one of the salients of each star extending longitudinally of the body, said salient being longer than the bar being staggered relatively to those of the other salients, each of said other salients next adjoining set.

being at an acute angle to the longitudinal This specification signed and witnessed axis of the bar, adjoining stars of each set this 23rd day of December, 1920.

pointing in opposite directions longitudi- JOHN THOMAS SIMPSON. nally of the bar, each star pointing in the Witnesses: opposite direction to the star on the opposite MABEL G. BUSH,

side of the bar, the stars on each side of the FLORENCE I. CARMAN.