US1290972A - Separable core for concrete work. - Google Patents

Description

E. N. GOODLETT &1. B. eoonwm. SEPAR ABLE CORE FOR CONCRETE WORK- APPLICATION F |LED JULY 25.1916.

Patented Jan. 14, 1919.

EDGAR N.

GOODLETT, 0F LOS ANGELES, AND JOHN B. G OODWIN,

0F LONG BEACH,

CALIFORNIA.

SEPARABLE CORE FOR CONCRETE WORK.

Specification of Letters Patent.

Patented Jan. 14,1919.

Application filed July 25, 1916. Serial No. 111,242.

To all whom it may concern:

Be it known that we, EDGAR N. Goonnnr'r, a citizen of the United States, and a resident of the city of Los Angeles, county of Los Angeles, State of California, and JOHN B. Goonwm, a citizen of the United States, residing in the city of Long Beach, county of Los Angeles, State of California, have jointly invented a new and useful inventionto wit, Separable Cores for Concrete Work, of which the following is a specification.

The invention relates in its present embodiment particularly to cores for forming recesses in concrete railway ties, among the objects of the invention are to form a core that may readily be removed from'the concrete mass when the latter has set avoiding the danger of the core becoming permanently embedded in the concrete. Also permitting the removal of the core with the minimum amount of disturbance endangering the integrity of the concrete mass be fore crystallization is complete.

In the specification and the annexed drawings we illustrate the invention in the form that we consider the best, but it is to be understood that we do not limit ourselves to such form because the said invention may be embodied in other forms, it is also to be understood that in and by the claims following the description we desire to cover the invention in whatever form it may be embodied.

In the accompanying one sheet of drawmgs:

Figure 1 is a perspective view from be- .neath of a separable core constructed and assembled in accordance with this invention.

Fig. 2 is a similar view from above of the same.

Fig. 3 is a fragmentary illustrating the manner of rious parts of the core.

Fig. 4 is a further enlarged fragmentary detail of the same.

It is common practice in forming recesses enlarged detail joining the vathe desired contour, of wood, metal or any other suitable material, hollow or solid according to conditions. This form of core is subject to the disadvantage that the shrinkage of the concrete mass in crystallizing is apt to bind the core in the'mass, 1n such a present the maximum manner that it must be forcibly driven out, endangering the integrity of the concrete in the act of dislodging the core by this method. he present invention contemplates formlng the core of a number of interlocking parts so constructed and combined that they resistance against pressure or distortion when assembled, yet may be easily disassembled inwardly, for the purpose of removing the core in parts from the recess formed thereby in the concrete mass.

In detail the structure illustrated in the drawings includes: the end sections alike in construction and comprising the plane 1 tapering from the base 2 to the shoulder line 3. The shoulderd is offset at an angle to the plane 1 and joins the uprising plane 5 tapering away from the shoulder 4E. The lateral edges of the plane 1 are bent at an angle to the plane at the point 6 and terminate in a loop 7 (see Fig. 4:). The lateral edges of the plane 5 are bent at an angle thereto terminating in the flanges 8 (see Fig. The lower edges of the base of the plane 2 are bent inwardly as at 9 to add rigidity to the plane and'to form a smooth edge at this point;

The side sections are alike in construction and comprise the main plane 10 tapering from the base line 11 to the shoulder line 12 and terminating in the flange 18 forming a continuation of the shoulderl which they overlie at the ends. The lateral edges of the main plane 10 are turned inwardly parallel with the plane and terminate in the flanges 14 (see Fig. 4). These flanges 14 lie within the loop 7 formed on the lateral edges of the end sections 1, with which they form a lock joint at the four corners of the core to main; tain the end and side sections in rectangular assemblage. From the shoulder flange 13 the plane 15 rises to the top of line 16, formof the plane 15. The lateral gles to form the flange 17, overlying the I flanged corners of the plane 5 of the end section. The base line 11 of the side sectionsis flanged inwardly at 17 as at 9 on the end sections, and for the same purpose. To give stability to the top of the core and prevent its collapsing inwardly, the top 18 is provided, the corners of the top are cut away as at 19 to clear the overlapping flanges of the end and side sections. The

plane of the top 18 is depressed below the edges to form the loops or grooves 20 and 21, respectively engaging the upper edges of the planes 5 and 15, holding the end and side sections in rigid assembly and preventing distortion of the core at the top.

To prevent the collapsing inwardly of the end sections and the side sections at the bottom, the insert 22 is provided, the edges 23 of which are flanged downwardly to bear against the end sections and the side sections respectively, when the insert is in position in the core. The angle of the flanges 23 and 2 1 conform to the angle of the end planes 1 and 10 and exert a wedging action when the insert is forced into position holding the lower portion of the core in rigid assembly. For convenience in handling the insert, the opening 25, is cut out of the center thereof.

For convenience in assembling the core, it is desirable to make up a form following the contour of the interior of the core between the planes 11 of the end sections and the planes 10-10 of the side sections, this form having the outwardly curled edges 27 and 28. The sequence in assembling the core, is to place the end sections in position on the form within the curled edges 27, then insert the lower edges of the flames let on the side sections, within the loops on the end sections and slide the side section down until the flange 13 rests upon the shoulders 4 of the end sections; then place therover 18 in position and force it downward so that its edges 20 and 21 engage the upper edges of the end and side sec-tions; then remove the core from the form 26 and insert the retainer 22. The core is then in complete and self contained assembly, ready for placing in the mold to have the concrete mass flowed around it.

When this concrete mass has set sufiicientl y to permit the removal of the mold therefrom the cores embedded in the concrete mass can be removed by pressure on the top 18 forcing the whole assembly of the core out of the mass of the concrete, or should the concrete mass have. set so as to bind the core 'it can be disassembled for removal.

This disassemb'ing of the core is accomplished by removing the retainer 22, which permits the end sections to collapse in wardly disengaging from the flanged edges 1d of the side sections, which permits the end sections to be lifted out of the concrete mass disengaging from the edges 20 of the cover 18; with the end sections removed from the recess, the side sections can be similarly moved inward and removed from the recess, disengaging from the edges 21 of the cover. It is obvious that no violent action is necessary in disassembling and re moving the core from the concrete mass, thus saving the concrete from vibration and jar likely to interfere with its proper setting and form. The cores are so proportioned that the cover 18 projects into or through the mold so as to project above the surface of the concrete mass to prevent it becoming embedded therein for obvious reasons. To prevent lodgment of grout or flowing concrete into the top of the cover 18 while pouring into the mold, the top may be covered by a suitable cap as indicated in dotted lines in Fig. 1. This, however, is not necessary to the proper functioning of the core.

WVe do not wish to be understood as confining this invention to the particular form and method of interlocking the several parts of the assembl as they must vary with the modifications in the contour and general application of the core to meet particular conditions, many variations being possible within the spirit of this invention.

Havin thus described this invention, what we claim and desire to cover by Letters Patent is:

1. A core including interlocking side and end walls, said walls being offset to form a continuous horizontal shoulder around the core, a removable top having grooves to receive the upper edges of the walls and. a removable retaining member within said core engaging the walls.

2. A collapsible core having side and end walls, interlocking means connecting the meeting edges of said walls, the core being of a reduced size adjacent its upper end, a top fitting within the core and having grooves to receive the upper edges of the walls and removable means within the core to prevent collapsing thereof.

In testimony whereof, we have hereunto set our hands at Los Angeles, California, this 5th day of July, 1916.

EDGAR N. GOODLETT. JOHN B. GOODVVIN.

In presence of B. M. MURRAY, BALowtN' VALE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C,

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