US 1502766 A
Description (OCR text may contain errors)
v J. F. CURLEY v INSERT FOR CONCRETE CONSTRUCTION Filed Feb. 5. i921 Patented July 29,
JAMES F. CURLEY, 0F YONKER-S, NEW YORK, ASSIGNOR TO CONCRETE STEEL COM- PANY, OF NEW YORK N. Y., A CORPORATION OF DELAWARE.
INSERT FOR CONCRETE CONSTRUCTION.
To all whom it may ooncem:
Be it known that 1, Jeanne F. CUR EY, a citizen of the United States, and a resident of Yonkers, county of VVestchester, State of New York, have invented an Improvement in Inserts for Concrete Construction, of which the following is a specification.
This invention relates generally to concrete construction and more particularly to metallic inserts adapted to be embedded in the concrete to provide means for attachin various devices, such as shaft hangers an the like, to the concrete structure.
One of the objects of this invention is to provide a metallic insert for incorporation in concrete structures that will be of simple construction and inexpensive manufacture and of eflicient action when in use.
Another object of this invention is to provide an insert of the above type that may be readily and conveniently incorporated within the concrete mold construct-ion preliminary to the pouring of the concrete and which, in addition to reinforcing the concrete structure of itself, will also distribute the load carried by the insert so as to avoid the concentration of stresses within the concrete itself.
This invention aims also to provide a metallic insert which will give a desirable flexibility as to adjustment and arrangement of the devices that it is desired to support therefrom.
Other objects will be in part obvious or in part pointed out hereinafter.
A preferred embodiment of the invention has been selected herein for purpose of illustration and description, the same being shown in the accompanying drawing, wherein,
Figure 1 is a perspective view showing the metallic insert assembled with its associated anchoring devices.
Fig. 2 is an end view, and i Fig. 3 is a side elevation showing the relation of the insert and its anchoring devices with respect to the securing bolts.
Fig. 4 is a bottom view showing details of the construction, and
Fig. 5 is an end view of the insert, illustrating one stage of the manufacture thereof.
Fig. 6 is an end view in part of the in- ;sert, showing a preferred means for closing the end of the insert, and
Application filed February 5, 1921.
certain Serial No. 442,670.
Fig. 7 is a sectional view of the closure taken on the line 77 of Fig. 6.
In reinforced concrete construction of mill or factory buildings, it is desirable to provide the walls and principally the ceilings of such structures with means whereby various devices, such as shaft hangers and the like, may be readily and positively secured thereto without necessitating the use of expansion bolts and the like, which weaken the concrete structure at their points of application and which also form only an inefiicient means of support.
Furthermore, it is advantageous to reinforce the concrete structure at the points of support and also to provide a means whereby a greater and more convenient flexibility of adjustment and arrangement is afforded than is possible in the case where devices such as expansion bolts alone are relied upon. According to this invention a longitudinally extending member 10 of substantially U-shaped cross section is provided, whereby the desired flexibility as well as reinforcement of the structure, is readily attained. The U-shaped member 10 is preferably made of steel and is conveniently made first by rolling into the form shown in cross section in Fig. 5. It will be noted that member 10 is rolled in such manner as to provide a pair of ledges 11 and 12 on one face thereof and a second pair of ledges 13 and 14 upon the other face of the member 10, and preferably, though not necessarily, opposite the individual members of.-the pair 11 and 12. The member 10 is furthermore rolled to provide a pair of upstanding flanges 15 and 16, the several ledges and the flanges extending longitudinally throughout its extent. The member 10 having been given its preliminary form as above described is thereupon further rolled or otherwise formed to give it a substantially U- shaped cross section, as is clearly shown in Fig. 2, the formation being made in such manner that the ledges 11 and 12 extend inwardly between one another from the interior faces of the two legs of the U-shaped member 10 and that the ledges 13 and 14: and flanges 15 and 16 extend outwardly from the exterior faces of the legs of the member 10.
The several proportions given the interior dimensions of the u-shaped member 10 are so chosen that the space within the U-shaped member 10 and the ledges 11 and 12 will conveniently accommodate the en- V the interruption in the ledges being of suffi- 1 placed upon the ceili cient extent to permit the entry therethrough of the upper enlarged portion or head 17 of the bolt.
The ledges 13 and 1 1 and the outwardly extending flanges '15 and 16 upon the exterior faces of the legs of the. U-shaped member preferably extend continuously throughout the entire length of the insert member 10 and form a groove on the exterior of each leg of the member 10 as for example between the ledge 13 and the flange for a purpose to be hereinafter described. The flanges 15 and 16 are provided at suitable intervals with apertures 21.
Suitable anchoring devices, such as the inverted U-shaped members 22, are provided with inwardly extending ends 23 adapted to enter the grooves upon the exterior face of the U-shaped member 10 and adapted also to engage the exterior ledges 13 and 14: to support the insert 10 within the'concrete' and to distribute the load carried thereby throughout the mass of concrete immediately surrounding the insert 10. A suitable number of anchoring devices 22 are provided and distributed at suitable intervals throughout the length of the U-shaped member 10 to insure the proper distribution of stresses throughout the concrete structure.
Figure 1 illustrates in perspective the relation between the U-shaped member 10 and the anchoring devices and illustrates also the manner of assembling the several parts with relation to the concrete mold previous to the pouring of the concrete. The insert 10 is 11,, form 2%, assuming that it is desired to provide the ceiling of a concrete structure with the fixture supporting means of this invention, the flanges 15 and 16 contacting with the mold 24 and forming the means whereby the insert 10 is securely positioned with'respect to the mold as by means of nails or screws extending through the openings 21 provided in the flanges 15 and 16. The anchoring devices 22, if not already attached, may now be placed in position so that the inwardly extending ends 23 thereof engage-the external grooves upon the legs of the U-shaped member 10 and contact with the exterior ledges 13 and 14.
To prevent the concrete from entering the insert 10 endwise during the pouring thereof, a suitable closure 25, more clearly shown in Figs. 6 and 7, is provided and may be conveniently formed of sheet metal bent into the shape shown in Fig. '2 to provide an inwardly extending portion adapted to enter and fit into the end portion of the insert 10 between the upper portion thereof and the interior ledges 11 and 12. The member 25 may be so proportioned with respect to the end section of the member 10 that the spring of the metal thereof will securely hold it in position and will avoid the necessity of additional securing means. The member 25 is obviously used where the insert 10 extends only throughout a fraction of the extent of the ceiling of the concrete structure and may or may not be used where the insert extends throughout the entire dimension of the ceiling.
The concrete having been poured and hav ing set, will be found to engage the U-shaped member 10 at the groove extending exteriorly throughout the length of the legs of the member 10 and will securely hold the insert 10 embedded therein. The insert 10 is thus laterally supported in the concrete by the exterior ledges 13 and 14.
The stresses due to the load which may be carried by the insert 10, as will be hereinafter more clearly described, are preferably distributed throughout the mass of concrete immediately surrounding the insert 10 by means of the inverted U-shaped anchoring devices 22 which, being engaged and surrounded by the concrete, distribute throughout the concrete the stresses transferred from the insert 10 to the anchoring devices 22. 1
Upon the removal ofthe mold, the interior of the insert lO will be exposed together with the lower faces of the flanges 15 and 16.. The interior ledges 11 and 12 may then form the supporting seat for the heads 17 of any desired number of fastening devices or bolts 18, which it may be necessary to employ to suspend from or secure to the hinging features, such as shaft hangers and the like. The cut away portions or recesses 19 and 20 of the interior ledges 11 and 12, being located at convenient intervals throughout the length of member 10, pro vide a simple and convenient manner for inserting the bolts 18 within the insert 10 and permit of a desirable flexibility of adjustment and positioning thereof throughout the extent'of insert '10 without disturbing such fixtures as may also have been positioned and secured. The load transmitted to the insert 10 by the fastening devices or bolts 18 is distributed substantially throughout the length of the insert itself and in turn is distributed throughout the concrete structure surrounding the anchoring devices 22 and the exterior ledges 13 and 14.
The member 10 having a cross section which is substantially U-shaped or channeled, offers considerable resistance to stresses and hence functions not only to distribute the stresses imposed upon it by the bolts 18, but also functions as a substantially reinforcing member in the concrete structure itself.
It will be noted that there is as above provided in this invention an insert of simple and inexpensive construction and of highly efficient action. It will also be noted that the several objects, as well as others, of this invention and many advantages have been effectively obtained.
It will be understood that the illustrative embodiment of the invention herein shown may be variously modified and the invention may be variously embodied within the scope of the following claims.
I claim as my invention:
1. An insert for concrete construction of the character described comprising a channel having parallel side walls with opposed ledges projecting respectively outwardly and inwardly from each side wall in a plane spaced from the top and bottom of said channel, the inwardly projecting ledges being arranged to receive and retain a bolt head and being recessed at opposite points to permit the insertion and removal of a bolt head, and the outwardly projecting ledges being arranged to be anchored in the concrete; and a flange parallel to the opposed ledges projecting from the outer edge of each side wall and arranged to be secured against a form, substantially as described.
2. An insert for concrete construction of the character described comprising a metal strip having ledges projecting from opposite sides thereof along spaced parallel lines and flanges projecting from one side thereof at the edges, said strip being of bent form with the two portions thereof from which said ledges and flanges project lying in parallel relation and the two ledges which project from the inner side of the folded strip lying in opposed relation in one plane, the construction being such that the strip may be rolled in flat condition and bent to channel form to provide an insert having inwardly directed bolt-supporting ledges and outwardly directed anchoring ledges and edge flanges, substantially as described.
In testimony whereof, I have signed my name to this specification this 8rd day of February 1921.
JAMES F. CURLEY.