US758061A - Bar for strengthening cement floors or concrete. - Google Patents

Description

No. 758,061. V PA'DBNTED APR. 26,1904.

J. F. GOLDING.

BAR FOR STRENGTHENING GEMENT FLOORS 0R CONCRETE.

APPLICATION Hum IA! 11, 1903.

H0 MODEL. F .1.

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I E Hi Illllli 76 76 Zllllllll UNITED STATES Patented April 26, 1904.

PATENT ()FFICE.

JOHN FRENCH GOLDING', OF NEW YORK, N. Y.

SPECIFICATION forming part of Letters Patent No. 758,061, .lated April 26, 1904.

Application filed May 11, 1903.

To all whom it may concern:

Be it known that I, J OHN FRENCH GoLmNe, a citizen of the United States, residing in the city of New York,'in the county of New York and State of New York, have invented a new and useful Improvement in Bars for Strengthening Oement Floors or Concrete, of which.

the following is a specification.

In the use of cement or concrete for the building of bridges, foundations, walls, floors, and the like and wherein some portions of such structures are subjected to tension it is customary to strengthen the cement or concrete between points of rest or support by means of various forms of metal tension members embedded therein, and in order that there may be no movement of the metal tension members in the cement or concrete the metal members have been formed in various shapes or roughened. My bar is an improvement upon these prior constructions; and it consists of a bar having longitudinal portions which are severed and bent outward from it so as to form loops into which the cement or concrete will enter and firmly lock the bar and cement together.

The invention is illustrated in the accompanying drawings, to which reference is hereby made, and in which 7 Figure 1 is a vertical section of a concrete floor, showing one use for my invention. Fig. 2 is a plan View of the bar, and Figs. 3 and L are sections on the lines 3 3 and 4t 4, respectively, of Fig. 2. Fig. 5 shows a modified construction of the bar, and Figs. 6 and 7 are respectively sectional views of the modified form on the lines 6 6 and 7 7 of. Fig. 5. Fig. 8 is a cross-section of another modification.

In said drawings, 10 represents the concrete of the floor, and 11 represents the strengthening-bars embedded in the depending ribs 12 of the floor. The bar is formed of flat metal and severed longitudinally at invervals and between the points 15, so that the portions 18 at the severations may be bent outward, as plainly seen in Fig. 2. The portions 13 are preferably bent alternately in opposite directions from the plane of the bar, as is clearly shown in said figures. This arrangement,

Serial No. 156,502. (No model.)

however, is entirely optional. The bar is preferably arranged in the concretewith the bent portions 13 extending horizontally, as will be understood from Fig. 1. In this manner I form a series of bends or loops in the bar which are adapted to admit the cement, so that the bar and the cement will be locked firmly together and the weight resisting strength of the bar will be transmitted to the concrete.

In the modified construction shown at Figs. 5 to 7 the bar is out along its center line at intervals and the metal at both sides of the severations is bent outward, as seen at 16, one portion being bent in one direction and the other portion in the opposite direction. Between the severations the bar remains of its original width, forming the bonds at 17.

In the modification shown at Fig. 8 the bars are formed of angle-iron and each of the webs are severed at intervals in a manner corresponding to theseverations shown at Fig. 2, forming bent portions 18, united by the bonds 19. In this modification the bends at adjacent severations are at right angles to each other; but the cement or concrete readily finds its way into the loops formed by them whether the severed portions stand vertically or horizontally in the cement.

The loops are formed in such numbers as may be necessary, and of course I do not wish to be limited to any particular number in proportion to the length of the bar, nor do I wish to be limited to the construction shown, as it is immaterial how the loops are formed, pro vided the cuts severing the parts bent to form the loops are longitudinal of the bars and do not reduce their tensile strength to an undesirable degree.

I It is apparent that a tension-bar of the character described is adapted to be arranged with its longitudinal axis close to the bottom of the cement or concrete floor or beam and at the maximum distance below the neutral plane of the floor or beam, so that the bar has the greatest efliciency as a supporting tension member. At the same time the edge of the bar is presented in a direction to oppose the transverse strain and the loops are presented with their openings upward to receive the cement or concrete.

I claim- 1. A tension-bar for use in cement or concrete, formed with a single series of central cuts, the metal between said cuts lying in a single plane and being unstretched, and having the metal at the sides of said cuts stretched laterally to form bends or loops, substantially as and for the purpose described;

2. A tension-bar having a continuous, longitudinal straight portion, and formed with longitudinal cuts at one side of such straight portion, the metal beyond said cuts being bent alternately to each side of said straight portion to form loops, substantially as and for the purpose described.

3. In combination with a body of cement or concrete, a tension-bar embedded in said body and formed with longitudinal cuts in horizontal planes, the metal at the sides of said cuts being bent out horizontally to form loops and the edge of the bar being in a direction to 0pcement or corror'ete,and a tension-bar embedded in said body below the neutral plane of the floor, and arranged with its edges presented upward and downward and towardth'e plane of resistance of the floor, the bar being formed with a series of longitudinal cuts and having the metal at the sides of the cuts bent out laterally to form loops the openings of which are presented upward, substantially as and for the purpose described. i

' JOHN FRENCH GOLDING.

v Witnesses: I

J Ess'IE M. KENNEDY, MERRILL WA'rsoN.

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