US963685A - Reinforcing-frame for concrete construction. - Google Patents

Description

APPLICATION IILED FEBJB, 1909.

Patented July 5, 1910.

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Witnuaeo E. CAN N ES. REINFORGING FRAME FOR GONGRETE GONSTR UUTION. APPLICATION FILED I'BB. I8, 1909.

Patented July 5, 1910.

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UNITED- STATES PATENT,

ELIE CANNES, or New YORK, N. Y.

I 'nEINroRorNe-rRAME FOR CONCRETE CONSTRUCTION.

Applicationfiled February 16, 1909. Serial No. 478,225.

To all whom it may concern:

Be it knownthat I, ELin CANNES, a citizen of the United States, residing at New York, in the borough of Manhattan and State of New York, have invented newv and useful Improvements in Reinforcing-Frames for Concrete Construction, of which the following is a specification.-

My invention relates to reinforced concrete construction, wherein the beam or girder is composed of concrete having embedded therein metallic reinforcing bars, and has for its object to provide an improved means for uniting the reinforcing bars to each other in such manner that the connections between the several bars shall be absolutely rigid.

It is well known that when a beam or girder'is loaded the reinforcing bars therein tend to slide in the concrete, this tendency or horizontal strain being zero at the center of the span, and maximum near the supports. The tensile bars should, therefore, all end at the supports. To take up the shear stresses other bars are 'provided,-which are bent up at an angle to the longitudinal tensile bars, and are connected to said tensile bars at fixed points. It is to form these connections absolutely rigid, as well as to rigidly connect said horizontal tensile bars transversely to each other, that my present invention is directed.

In the drawing accompanying this descriptionz Figure 1 is a side elevation of a portion of a beam or girder embodying my invention, the concrete being shown in dotted outline. Fig. 2 is an enlarged detail top plan view of a ortion of one of the tensile bars showing t e connection between the same and one of the diagonalbars for taking the shear stresses. Fig. 3 is a transverse section on the line IIIIII, Fig. 2. Fig. 4: is an enlarged detail edge view of a portion of one of the diagonal bars. Fig. 5 is a face view of the same. Fig. 6 is a. vlew similar to Fig. 1 showing a slightly modified construction. Fig. 7 1s a transverse sectional view taken on the line VII-VII, Fig. 6. Fig. 8 is a transverse sectional view through a plurality of longitudinal tensile bars showing my improved means for rigidly connecting them together to prevent lateral movement. Fig. 9 is a transverse sectional view on the line IX-IX Fig. 8. Fig.

Specification of Letters Patent.

. Patented Jul 5, 1910.

10 is a detail face view of one of the connecting plates shown in F igs. 8 and 9.

Similar numerals of reference denote, as far as possible, corresponding parts in the several views. I

In the said drawings, referring more particularly toFigs. 1 to 5, the reference nuinerali l denotes the horizontal tensile bar extending from end to end of the beam or girder, which is preferably one of a series of similar bars lying in the same horizontal plane but'spaced apart as hereinafter described. .f

In an application for'Letters Patent filed by me November 13, 1908, Serial No. 462,490, I have shown and described a concrete reinforcing bar of novel construction, and in Figs. 1, 2 and 3 have shown that bar 1 of similar construction, that is to say, formed with a series of oppositely, disposed depressions 2 having the form ofa triangular prism alternating with flat projections The diagonal shear bars 4 are bent at their lower ends to lie parallel with the bar 1 and terminate at their upper ends a certain length-in the compression side of the beam. Said barst are providedat their lower ends on one side with one or moreprojections 5 shaped to accurately conform to the shape of the depressions 2 in bar 1 so that when the twoare interlocked they will be rigidly maintained against independent longitudinal movement. To firmly retain the bars 1 and 4 in this engagement I provide collars 6 of a width equal to the distance between the projections 3 on one side of bar 1, but of an interior area large enough to loosely embrace both said bars 1 and 4:, and firmly clamp said collar and bars 1 and 4: together by means of wedges 7 inserted between said collars and bars 4, as shown in Figs. 2 and 3, the result being that not only are said bars firmly held against longitudinal movement with respect to each other, but said collars 6 are also held by said projections 3 against said movement, and a substantially integral construction is produced.

I have shown in Figs. 1 to 5 a flat bar 4; provided with projections 5, but I may employ diagonal shear bars identical in structure with longitudinal bars 1, as shown at 8 in Figs. 6 and 7, in which event it will be necessary to provide intermediate plates 9 having on both sides projections 10 adapted I to register withthe depressions in said bars 7 1 and. 8, saidfbars belng retained together by collars 11 and wedges 12..

. In the construction shown in Figs. 1 to 5,

' it may bedesirable to extend the horizontal portions of the bars 1 to engage two or more of the depressions 2 in bars 1, and in doing this I may position the projections 5 on said bars 4 so that they will register with alter-' nate depressions in bar 1.:

Wherea series of longitudinal tensile bars 1 1 are employed in a single beam or girder, I ';maintain them in position relative to each other by means of cross plates 13,shown in Figs. "8 to 10, said plates having projections 14' corresponding accurately in shape with 3 depressions2 in said bars 1', said platesi being connected by bolts 15 whereby ;the spacesv between said bars 1 are maintained in fiXed I s relation, it being observed that the width crete. that may bereadily assembled, either assembled will form asubst-antiallyintegral as shown at 16, I provide a support for bars 7 '1 and also the necessary space or depth for the concrete below these bars. 7

By means of my improved connections I provide a reinforced structure for the con- 'at-the point ofmanufacture of the iron work, or at the point'of erection, and which when structurein which there can'be no separate movement after the concrete has been ap-- plied 'thereto,"wherebysplitting or disinte grating of the'concrete is etlectually prevented and a true monolithic beam or girder isproduced. 7

.While I have shown and described my in- I 5 vention as particularly applicable to beams,

ing one end lying parallel with said tensile bar and provided with a projection adapted to engage and fit'one of the depressions in 1 said tensile bar, a collar embracing said bars at their point of connection and of'a width equal to the space between the projections on said tensile bar to prevent'longitudinal movement thereon, and means for clamping said collar upon said bars. p

2. In a remforcin frame, a lon itudinal tensile bar having v epressions and projections in its surface, a diagonal shear bar having one end lying parallel with saidtensile bar and provided with a projection adapted to engage and fit one of the depressions in said tensile bar, a collar embracing said bars at their point of connection and of a width equalto the space between the projections on said tensile bar to prevent longitudinal movement thereon, and a wedge for clamping said collar on said bars.

In testimony whereof I have hereunto-set my hand in the presence of two subscribing witnesses. I

ELIE CANNES.

Witnessesi v C. O. HOPPER, WM. B. BARRY, Jr.

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