US1052149A - Concrete-insert. - Google Patents

Description

J.KENNEDY.

CONCRETE INSERT.

APPLICATION FILED APR.30, 1912.

1,052,149 I I Patented Feb. 4, 1913.

wi/tvwooeoz 3 win nfor JOSEPH EENNEDYQOF NEW YORK, 3i. Y.

CONCRETE-INSERT.

Specification of Letters Patent.

Patented Feb. 42,1913.

Application filed April 30, 1912. Serial No. 694,212.

To all whom it may concern:

Be it known that I, 'Josnrrr KENNEDY, a citizen of the United States, and a resident ofthe borough of Bronx, 'city, 'county, and State of New York, ha ve iii-vented certain new and useful Improvements inConcrete- Inserts, of which the followingis a speck fication, accompanied byfdrawings.

This invention relates to concrete inserts adapted to be secured to the mold board of a form of mold into which the concrete or other cementitious material is poured, and thus become embedded in the material, so

' that the insert remains after the mold in the form or mold.

boards are removed, and forms a socket or anchorage in the concrete for attaching -various objects.

Difficulty has been experienced in suitably and conveniently fastening the insert to a mold board in such manner that the insert is held in proper position and alinement during pouring, and moreover the. ordinary means, such as nails or screws for fastening the insert to the mold board, remain embedded in the concrete, and are objectionable and may be unsightly.

My improved insert is capable of being fastened or contered in position in the mold preparatory to pouring, by means which come away with the mold board, thus leaving 'no nails, screws or other fastening devices in the concrete, to be afterward'cut 05 or bent backward.

My preferred method of procedure is to fasten a supporting plug, as for instance of wood, to themold board of the form and support the insert upon the plug, then fill the mold with concrete, and finally remove the mold board and'the plug, thereby leaving the insert embedded in the concrete.

The insert in one of its preferred forms is illustrated in the accompanying drawings, in which- Figure 1 is a side elevation of van insert embodying the invention; Fig. .2 is a top plan view; and Fig. 3 is a longitudinal sectional view showing the insertin position Referring to the drawings, A represents an insert embodying the invention, adapted to be embedded inthe cementitious material B formed in the mold C. The insert comprises the shell D, referably cylindrical in form, and preferaby closed at one end E, by forming the inclosing portion of the shell integrally with the b0 y of the shell;

or by inserting a dot-ted lines.

The shell D may be cast, preferably in one piece, or otherwise suitably formed and is interiorly threaded at F for a portion of its length, in this instance the threaded porplug indicated by the tion beingffshown substantially midway of the length of the bore, while the remaining end portions G and H of the bore have smooth surfaces and are of greater diameter than the threaded portion. The open throat G of the device, having a smooth guiding surface should be elongated and of substantial depth as compared with the length of the central threaded portion of the shell and affords means for centering a bolt or other fastening device, as it is forced into the insert, and thereby directs the bolt, so that it will more readily engage the threads F. The enlarged blank or smooth portions G and H of the shell are preferably of substantially'the same diameter and also afford certain manufacturing advantages, because if the insert is made from a casting, the enlarged core has a tendency to make that portion of the casting which is to be threaded free from blow holes, and in tapping the portion to be threaded, a taper tap may go through said portion without f0 ow. The smooth throat portion G "also has a particular function in enabling me to carry out my improvement as will hereinafter appear.

The exterior of the shell B is provided with anchoring projections of any suitable form, in this instance the upper portion of repluiring a seconding or bottoming tap to the insert being provided with a flange J and webs K extending between the flange and the body portion of the shell. The flange J and webs K prevent both longitudinal and torsional movement of the insert,

but I am not to be understood as limiting my invention to any particular anchoring pro ections on the exterior of the demos.

In carrying out my invention 1 provide a plug L of wood or other suitable material, which is adapted to enter the smooth throat portion G of the insert and bemaintained' in said end portion by frictional engagement 1 with the smooth interior surface of the bore This plug L is preferably slightly tapered,

ngitudinal aperture R to. receive the screw or other The insert may be provided with the lugs] fastening device P. The plug is preferably first screwed to the mold board and then the insert is supported over the plug, as shown in the drawing. After the concrete has been poured and has s'ufliciently set, .the

mold boards are removed and with them the plug or plugs, thereby leaving-the insert embedded in the concrete.

S at its base, if desired, ada ted to receive nails or screws to aid in hol ing the insert 'upon the mold board, although I prefer to omit the holding lugs S. If such lugs are used, they should be bent backwardly away from the lane of the base of the insert, so

.rth'at the insert rests upon the mold board I claim and desire to obtain by Letters- Patent the following:

1. A concrete insert comprising a hollow; shell orcasing having its parts integrallyi formed from a single piece of metal, anchoring means on the exterior of the shell, said shell having a cylindrical bore 0 n at one:

end and closed atthe other en the openi with-engaging means for-a fastening de-i end of the shell' being adapted to bear flush; against a mold board or other support-, the central portion of the bore being provided? vice, the integral end portions of the shellj having smooth interior cylindrical surfaces; Q

and a removable plug adapted tolbe insertedi in the smooth bored end portion at the open? 'end of the shell and be maintained in said; end portion by frictional engagement with I V the smooth interior surface of the bore, andZ other support.

means for securing said plug to a mold board or other support, whereby theinsert is maintained in position during pouring and the plug comes away from the insert with the mold board or other support.

2. A concrete insert comprising a hollow cylindrical shell or casing having its parts integrally formed from a single piece of metal, anchoring means on the exterior of the shell, said shell having a cylindrical bore open at one end and closed at the other end,

'theopen end of the shell being adapted to bear flush against a mold board orother support, the central portion of the bore be ing of smaller diameter than the remaining integral end portions and threaded to. receive a fastening device, the said end portions of the bore being of substantially the same diameter andhaving smooth interior cylindrical surfaces, the smooth bored end portion at the o en end of the shell being elongated and 0 substantial depth as compared with the length of the central thread ed portion of the shell andforming a smooth J throat for guiding the fastening device into the sald threaded portion, and a removable plug adapted to be inserted in the. smooth bored open end of the shell and be maintained in said end portion by frictional en- 4 gagement with the smooth interior surface of the bore, and means for securing said plug to a mold board or other support,

whereby the insert is maintained in position from 'the'insert with the mold board or In testimony whereof I have signed this during pouring and the plug comes away specification in the presence of two subscribing Witnesses I i '5 "Users KENNEDY, Wi nesses: i I H l. B.- Moons,

. ELIZABETH ALEXANDER.

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