US1260331A - Insert. - Google Patents

Description

w. A. commas.

INSERT.

APPLICATION FILED 050.27.1915.

Patented Mar. 26, 1918.

2 SHEETS SHEET l- PNI FIEIQEQ WILLIAM ARTHUR COLLINGS OF KANSAS CITY, MISSOURI.

Insnrvr.

Specification of Letters Patent.

Patented Mar. 26, 19318.

Application filed December 27, 1915. Serial N 0. 68,810.

To all whom it may concern:

Be it known that I, WILLIAM A. CoLLINcs, a citizen of the United States, and a resident of Kansas City, in the county of J ackpart of this specification.

In concrete buildings it, of course, becomes necessary to provide suitable supports on the ceilings and the floors for the attachment of machinery and the like, but since it is very diflicult and expensive to install such supports after the building has been finished and due to the unsatisfactory results obtained from such supports after installation, it has become the practice in structural concrete work to anticipate the requirements for such supports, and accordingly inserts of sufficient strength are embedded in the concrete ceilings and floors at the time of building to meet future requirements.

It is a well known fact, in concrete engineering, that approximately the lower half of a concrete floor or beam isnormally in tension while the upper half is under compression, these stressed portions having what is termed a neutral plane or axis therebetween. Any loads imposed upon the cons crete member should preferably be so disposed that the stresses resulting therefrom. are located in the compression or upper part of the concrete above the neutral axis in order to obtain the greatest factor of safety.

Heretofore the manufacturers of inserts for use in concrete constructions, have disregarded the vital factors of adhesion or bonding, and also the proper construction and location of the inserts in relation to the neutral axis of the concrete member. 'Another difficulty encountered in the past in the manufacture of inserts, lies in the fact that the inserts are shaped to afford flanges or projections having sharp edges and corners which, under load,-tend to split and form line-cleavages in the concrete construction, thus producing a weakened and dangerous structure. i

This invention relates to an insert having an opening in the base thereof adapted to removably engage or hold bolts or other fastenings for attaching, supporting or re taining pipes, machinery, shaft hangers, rails, or other mechanisms upon ceilings, floors or wallsof concrete structures. insert is constructed with projecting portions having rounded corners and edges, and integral corrugations around the exterior thereof, and is adapted to be embedded in concrete with the interior of the base accessible and with the upper portions of sufiicient length to permit the same to extend into the concrete beyond and above the neutral axis and into the upper or compression part of the concrete so that the insert will have its major sustaining portion above the neutral axis, said rounded edges and corners insuring a good bond to be formed between the concrete and the insert, without danger'of cracking or splitting the concrete.

It is an object of this invention to form an insert of sufficient depth or length to insure a large portion of the exterior surface thereof bonding in the concrete above the neutral axis of the concrete structure in which the insert is embedded.

It is also an object of this invention to construct an insert having a hollow base provided with exterior rounded corrugations, and with an integral upright portion having rounded projections thereon, said insert, when embedded in a concrete floor or beam, adapted to extend therethrough beyond the neutral axis thereof with the upright portion embedded in the upper or compression half of the floor or beam, permitting an excellent bond to be formed between the concrete and the insert around said rounded corrugations and projections.

It is also an important object of this i11- vention to construct an insert adapted to be embedded in a concrete structure without interference with the reinforcing members and with one portion thereof projecting The construct an insert having a corrugated base and anchor adaptedto be embedded in a concrete structure to obtain the greatest sup porting effect therefrom, said base cored out to receive removably therein an attaching member for supporting mechanisms from the ceiling or upon the fioor of a con crete building, or fastening a rail to a concrete tie.

It is a further object of this invention to construct a corrugated insert having a hollow tapered base adapted to removably receive an attaching bolt removable therein,

and with the upper portion of said insert surrounded by a coiled reinforcement member to increase the strength of the concrete around the insert.

It is furthermore an object of this invention to'construct an insert having a tapered hollow base with exterior rounded corruga tions, adapted to receive detachably engaged therewith a supporting bolt and provided with an integral upright anchor extension member having a plurality of corrugations integral therewith spacedfrom one another and decreasing in size from the upper end down to the base to obtain the greatest sustaining ef ect from the concrete in which it is embedded. 7

It is finally an object of this invention to construct an insert of simple and durable construction adapted to be embedded in concrete with the corrugated anchor portion thereof disposed above the neutral axis of the concretestructure to derive the greatest retaining effect therefrom. Y

The invention (in a preferred form) is illustrated in the drawings and hereinafter more fully described.

Inthe drawings:

Figure 1 is'a section through a concrete floor having embedded therein a ceilingsupport embodying the principles of my invention. V

Fig. 2 is a view similarv to Fig. 1, showing. the base of the embedded device in section. I

Fig. 3 is a cross section of a concrete floor having embedded therein the device in an invertedposition to afford a floor attaching means.

Fig. 4 is a view similar to trating a modified form of the device.

Fig. shows a modified fornrof the device in elevation having two anchor members, with the device embedded in the underside of a concrete floor as a ceiling support. Fig. 6 is a top plan view of the device shown in- Fig. 5. r

Fig. 7 is a bottom plan view thereof.

intervals below one another.

a portion of the slotted base showing a liner for use with small sized bolts.

As shown on the drawmgs: The reference numeral 1 designates a concrete floor having reinforcing rods 2, and

an insert embedded therein, said insert comprising a base 3, with the sides andcnds thereof tapered downwardly and inwardly, and having integrally foried around the outer periphery thereof a plurality of rounded corrugations eh A threaded aperture 5, is provided in said base 3, extending upwardly from the bottom thereof adapted to receive a threaded stud or bolt 6, or. any other suitable supporting means. threaded therein for securing machinery or the like to ceilings or floors of concrete buildings. Integrally' formed on, said base 3, and projecting upwardly from the upper surface thereof a suspending arm or anchor 7, having an integral fiat circular top 8, and integral flat circular flanges or projections 9, extending outwardly at right angles to said arm and spacedone below the other with agradualdecrease in the diameter of said flanges from the upper to the lowermost one thereof. Formed or drilled in tne surfaces of each ofthe sidesand ends of the base 3, at the middle of the lower edges thereof, are recesses 10, each adapted to receive a nail for securing the insert to the wooden form ormold to hold the insert in place particularly during the pouring of the concrete.

In the modified form of device shown in Fig. hthe construction of the insert-is exactly the same as that above described with the exception that a spiral coil 11, is slipped over the anchor member 7, and spaced therefrom to permit the concrete to pass therethrough to bond around; saidainsertfand spiral, thus greatly reinforcing the concrete immediately surrounding the insert for sustaining heavy loads. 7

Figs. 5 to 9, inclusive cover a modified form of insert having two or more su'spende ing or anclioi'.n 1enibers. constructed as ala outer periphery of said base '12, are a phi-'- rality of rounded corrugations 13;spa'ced at Formed or machined in the lower central portion of each of the ends and sides of the base 12, are tapering recesses 14, each adapted to receive a nail for securing the insert in place in a wooden form or mold for the concrete. Cored within said base 12, is a long narrow recess 15, the lower wall 16, of which is identical with the lower wall of said base 12, having a longitudinal slot 17, therein, opening at one end into a substantially square enlargement 18, adapted toreceive the head of a bolt 19, therethrough, to permit the bolt to be slidably engaged in the slot 17 with the threaded portion thereof projecting outwardly to receive a nut or other object thereon. To prevent the bolt head from accidentally sliding or working its way out of the recess 15, lugs or projections 20, are integrally formed on the inner surface of the wall 16, on each side of the open end of the slot 17.

In the modified form of the device shown in Fig. 10, the construction of the anchor members is the same as that shown in Fig. 5, said arms integrally formed upon an L- shaped base having a long leg 21, and a short leg 22, at one end thereof and at right angles thereto. Integral with the sides and ends of the base are peripheral rounded corrugations 28, and spaced at intervals at the center on the exterior of and near the bottom of said base sides and ends are recesses 24-, affording a means for securing the device in position in a mold. Cored out of the leg 21, of the base is a long narrow slot 25, having a short slot 26, at one end thereof and at rightangles thereto communicating with a square enlargement 27, formed in the short leg 22, of the base, and adapted to receive the head of a bolt inserted therethrough to permit the bolt to be engaged in the slot 25.

Fig. 11, is a top plan view of a modified form of an anchoringarm having a starshaped top 28, to allow the concrete to flow easily therearound and prevent the formation of pockets beneath said top.

The fragmentary section of the base 12, shown in Fig. 12, has a small sized bolt 29,

' slidably mounted in the slot 17, and to prevent said bolt from turning in the recess 15, a liner 30, is removably placed around the head of the bolt, thus making it possible to use bolts of various sizes with the inserts.

The operation as follows:

When it is desirable or necessary to support or suspend machinery, or the like, from the ceilings of a concrete building, the inserts are first positioned with the base thereof resting on the floor of a wooden form or mold and held in place by means of nails engaging the recesses 10, of the insert; The reinforcing rods 2, are then installed on both sides of the inserts after which the mold is filled with concrete, which due to the rounded surfaces, corners and'edges of the tops 8, flanges 9, and the corrugations 13, thoroughly molds around the insert and forms a bond therewith. After the concrete has set and hardened the mold is removed and the machinery or machinery supports may be secured in place by means of the bolts 6, which engage themachinery, and are threaded into the threaded apertures 5, of the inserts. W ith the anchor members 7, extending into the upper or compression part of the concrete floor 1, above the neutral axis and with the base 8, tapered as described, the insert is prevented from withdrawal from the concrete and the structure is capable of sustaining great loads without danger of the concrete splitting or cracking thus weakening the structure. In fastening machinery on concrete floors, the inserts are simply inverted with the bottom of the base 3, flush with the surface of the concrete floor, as shown in Fig. 8. For the purpose of supporting extra heavy loads, a spiral 11, is slipped over the anchor member 7, for reinforcing the concrete immediately surrounding the insert.

The gang inserts shown in Figs. 5 to 10, inclusive, are bonded into the concrete, as above described, the connecting or retaining bolts 19, having their heads inserted through the square enlargements 18 or 27, and moved so that the threaded shanks of the bolts may project outwardly through the slots 17, or 25, respectively, to permit the attachment of mechanisms thereto. Bolts of different sizes may be used with the slotted inserts and to prevent the small sized bolts from turning in the recess 15, liners 30, are placed around the heads of the bolts.

It will, of course, be understood that the inserts may be made with a plurality of anchor members, with the tops and flanges thereof of various shapes, and having recesses in the base thereof adapted for receiving a number of supporting bolts. The details of construction may be varied through a wide range without departing from the principles of this invention, and I therefore do not purpose limiting the patent granted otherwise than necessitated bythe prior art.

I claim as my invention:

1. An insert for concrete, comprising a tapered base having formed integrally thereon a plurality of rounded corrugations, and an anchor formed integrally with said base, said anchor having an integral fiat outer end and having bonding elements disposed between its end and the tapered base.

2. An insert for concrete, comprising a tapered L-shaped base, one wall of said base having registering long and short slots conforming to the L-shape of said base, the short slot being formed with an enlargement, a bolt adapted to have the head thereof inserted tln'oi-igh said enlargement to per mit said bolt to be shifted to engage the longer slot, and anchoring means integrally formed on said base.

8. An insert for concrete, comprising a corrugated tapered base having recesses in the sides thereof to permit attachment to a mold tapered suspending means integral with said base, and a coiled member engaged thereover and spaced therefrom to reinforce 10 the concrete molded around said insert.

In testimony whereof I have hereunto subscribed my 112M116 inthe bresence or two subscribing witnesses. o t l.

WILLIAM ARTHUR COLLINGS. V

itnesses CHRIS PnA'RsoN, FLORENCE SN DER.

.Cepies of this patent may be obtained for five cents each, by addressing the Commissioner of Ifatents, V i 7 Washington, D. G.

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