US1631154A - Molding core - Google Patents

Description

June 7, 1927.

l 1,631,154 J. C. POETZ HOLDING com Filed Dec. 21. 1925 Jo/m C P062? @Wemag Patented June 7, 1927.

UNITED ySTATES JOHN C. POETZ, OF LEONIA, IDAHO.

v MODDING conn.

Application filed December 21, 1925. Serial No. 76,584.

My pres-ent invention relates to improvements in molding cores especially designed for use with plastic material in the construction of concrete building structures involving cellular-'or hollow monolithic walls.'

The primary object of the invention is the provision of a hollow implement of this character which may be constructed of sheet metal or other suitable material and provided with means for centering and accurately placing the core in position for pouring or tamping the plasticconcrete material. The vcores are used preferably in rows,- in desired numbers in the process of constructing courses or layers in the wall and they are spaced apart in order that the material may fill the spaces formed between adjoining implements or cores. Means are provided for accurately and conveniently spacing` the cores with relation one to another and such spacing means contemplate interchangeable parts for use with the cores whereby the desired distances between the cores or the cells formed about them may be predetermined. The cores are removable and are fashioned with features which facilita-te their removal or withdrawal from the formed cell after the concrete or plastic material has set.

The invention consists in cert-ain novel combinations and arrangements of parts for accomplishing the above indicated purposes and functions as will hereinafter be more fully set forth and claimed.

In the accompanying drawings I have illustrated one complete example of the physical embodiment of my invention wherein the parts are combined and arranged in accord with .the best mode I have thus far devised for the practical application of the principles of my invention.

Figure 1 is a perspective view of a. hollow core embodying my invention.

Figure 2 is a vertical sectional view of ,the core showing it in a section of the concrete wall.

Figure 3 is a transverse sectional view of the core at line 3-3 of Figure 1.

In carrying out my invention the cores may be fashioned in uniform sizes and shapes and employed for molding cells or spaces of complementary size and shape in the concrete wall, and these cells may be spaced at uniform distances apart7 the distance being predetermined to suit different conditions in the structure.

In the present exemplification of my invention I have utilized a generally rectangular shaped hollow core for fashioning a generally rectangular shaped cell C the upper end of which is closed by a metal reinforcing plate P in Figure 2 where a portion of the concrete wall IV is shown in section.

The core body 1 maybe made up of sheet metal or other suitable material with bulging or convex sides and rounded corner-s2 to facilitate withdrawal or removal of the core from the cell after the concrete is set. rlh-e ycore body is open at top and bottom and these parts are closed by removable plates 3 and 4 the former for the bottom and the latter for the top of the open end core.

The bottom plate is secured within the open lower end of the core body and is fashioned with a. central perforated boss 5 struck up from theplate for the reception of 'a tie bolt 6 having an enlarged head 7 on its lower end below the bottom plate.l

The bottom plate as here used is a flat generally rectangular plate with rounded edges to conform to the interior of the core body and fit snugly and neatly within the interior of the open lower end of the core body. At its four. sides the bottom plate is fashioned with turned-down lugs 8 that are seated in the concrete base when the core is placed in position, and with turned up lugs 9 which are slipped or inserted in the loops or complementary straps 10 one of which is attached at the inner side of each of the four walls of the core body. These lugs 8 are used in centering the core in place and seating it firmly on the concrete base preparatory to filling the spaces about the cores and tamping the concrete into place.

The top plate 4L of the core is preferably dished as shown to strengthen it and to form an annular groove 12 at its under side to neatly fit over the top edge of the core body, and a retaining shoulder or flange 13 of the dished plate lits over the top edge and 'down the side of the core body a suficient distance to form a cover for the interior of the core body and prevent access of lling material to the interior of the core.

The threaded endof the central tie bolt 6 is passed up through a bolt hole 14 in the center of the top plate, and a clamp nut 15 is threaded on the end of the bolt against the top face of the top plate. By turning home the nut on the projecting bolt-,end the two heads or plates 3 and 4 of the core are clamped between the bolt head 7 in the boss 5 and the nut l5 on the top of the topplate l of the core.

In use the cores are placed in rows'or in other formations and spacedl` uniform disf.

tances apart from their centers andthese distances may be varied by the use of gage devices preferably arried on the topplatie's of the cores. For this purpose the'top plate is fashioned with' gage-lugs 16 at three of its sides for contactI with adjoining gage lugs as indicated in Figure 2, and a larger or'longer gage lug 17 is provided on the tourt-h side ofthe top plate for contact with a lateral form 18 used in erecting tne concrete-wall, It will be apparent that by lengthening the gage lugs 16 and placing' in contact complementary lugs on adjoining core plates the distancesbetween centers of' the coreswill be increased and the resulting cells C willbe spaced farther apart. Regardless of the shape of the top plate and .cross sectional shape of the core body, these gage lugs may be diametrically disposed with relation to the core body for coaction with complementary gage plates. j

From the above description taken'in connection with my drawings the utility of the implement and its-mode ofV use will be apparent, and it will be evident that the implement as thus constructed and used is coin',-

pact, well braced, comparatively light in weight, durable, and efficient in the performance ot its required` tunctlols.

Having thus fully described my inven` tion, what I claim as new and desire to secure by Letters Patent isl. The combination with a core body having` an open top and bottom, of removable top and bottom plates, a tie bolt and nut connecting said plates,and means for retaining in position the clamped top and bottom plates. Y

2. The combination with a` core body hav- Y lng an open top and bottom, of removable top and bottom plates and a connecting rclamp bolt, guide devices on the exterior of plementary devices on an adjoining laterally l disposed core.. Y

4. Thecombinationwith a core body llaving interior retaining loops, of a reinoyable plate'having lugs to co.-a ot with said'lOQps, a top plate the core and a clamping bolt for said plates. e

In testimony whereof I aliiX my signa-V ture.

JOHN G, PonTZ,

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