US2276422A - Collapsible core for wall molds - Google Patents

Description

March 17, 1942. E. L; SIEMER COLLAPSIBLE CORE FOR WALL MOLDS 3 Sheets-Sheet 1 Filed April 10, 1939 v INVENTOR.- Z' WARD L. JYEM ATTORNEY.

E Nu m v bN unk . EYE i \Q March 17, 1942. 'E. L. SIEMER COLLAPSIBLE CORE FOR WALL MOLDS s Sheets-Sheet 2- Filed April 10, 1939 0 REE S INVENTOR. EDWARD/L jE'ME Mafia/b4:

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March 17, 1942. E. SIEMER 2,276,422

COLLAPSIBLE CORE FOR WALL MOLDS Filed April 10, 1939 3 Sheets-Sheet 3 vb 1 5e. 1.

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\ IN VENTOR. Z'DwA ML. SIEMEB ATTORNEY.

Patented Mar. 17, 1942 UNITED STATES ATENT OFFlCE 2 Claims.

My invention relates to new and useful improvements in a collapsible form for plastic material, and has for its principal object to construct hollow walls for business, residential buildings, or other purposes.

A further object of my invention is to cast a hollow wall monolithically with respect to its shells and bonds connecting the shells.

A still further object of my invention is to cast a hollow wall as means to insulate against high or low degrees of temperature, and being impervious to moisture passing through the wall.

A still further object of my invention is to provide collapsible forms for the hollow and external faces of the wall, the forms to be withdrawn or removed without serious deterioration thereof, so that the same can be applied repeatedly.

A still further object of my invention is to provide a metallic structure for the forms so that an interior face of the wall may be ribbed to receive and retain a plastic finish as in the case of ordinary construction, while the outside face of the wall may be decorated by embossing the form ornamentally, which in turn will reproduce in the cast of the wall, and the said formed plates may be straight and smooth to produce a like surface for the wall.

These and other objects will hereinafter be more fully explained, reference being had to the accompanying drawings, forming a part of this specification, in which like characters will apply to like parts in the different views.

Referring to the drawings:

Fig. l is a side View of a collapsible core to produce a hollow wall in the course of casting the same.

Fig. 2 is an edge view of Fig. 1.

Fig. 3 is an enlarged upper end view of the core.

Fig. 4 is an enlarged sectional view taken on line 44 in Fig. 3.

Fig. 5 is an outside elevation of the panels constituting forms for the sides of the wall, parts removed for convenience of illustration.

Fig. 6 is an inside view of Fig. 5, parts removed for convenience of illustration.

Fig. '7 is a vertical edge view of Fig. 6.

Fig. 8 is an upper end view showing the interlocking feature of the panel edges.

Fig. 9 is an edge view of the cap as an enclosure for the top of the core.

Fig. 10 is an underside view of Fig. 9.

Fig. 11 is an upper side view of Fig. 9.

Fig. 12 is a plan view at the upper end of the form assembly prior to placing plastic material therein,

Fig. 13 is a side elevation of Fig. 12.

Fig. 14 is a side view of one of the spreaders and fragmentary portion of the vertical bar support.

Fig. 15 is a transverse view tothat shown in Fig. 14.

Fig. 16 is a plan view showing the assembly of the forms as applied to the corner structure of the wall.

Fig. 1'7 is a side view of the centrally disposed strut member for the core, the position of which is shown in Fig. 3.

Fig. 18 is the plan view of a wall fragmentarily shown as cast in the assembled forms, the forms being removed.

Fig. 19 is an inside elevation of a wall and a sectional View of the right angle portion through the hollow thereof, illustrating a horizontal ribbed surface.

Fig. 20 is an elevation of the wall as over coated, the right angle portion being in vertical section between the cores.

My invention herein disclosed consists of a collapsible core and panels to form the exterior of a wall, the core comprising two side plates I, having offsets formed in the body as at A as stifiening means for the plates longitudinally, and the said plates being connected at their opposing edges by end plates 2 having similar olfsets for a similar purpose to that of the side plates.

It will be seen that the edges of said side and end plates converge downward for the removal of the core by drawing the same upward when plastic substance poured in the forms is well set.

As a means to reinforce the side and end plates of the core longitudinally, there is placed medially of their respective members a channel 3, the legs of which are preferably welded to the body of the plates as shown in Fig. 3.

It will be understood that the side and end plates interlock where their edges meet as a convenient meansto withstand an outward pressure imposed at the time of pouring plastic substance in the forms, and also as slideable means to remove the said end members that is accomplished by inserting a hook-like structure in apertures B, punched near the upper end of each of said channel elements, as shown in Fig. 4.

To resist an inward thrust of plates I toward each other, there is placed therebetween a strut member 4, having a like convergence downward to that of the end plate members as a convenient means to remove the same in like manner provided for the plates by an upward pull,

at which time the side plates are free to flex in-' ward toward each other sufiiciently to break the bond of the plastic substance externally applied. To avoid rigid adhesion of plastic to the exterior of the core, there should be applied to the outer surface of the core a coat of paraffin or the like liquified by an appropriate solvent.

The forms for the outside of the plastic wall consist of two ply panels 5 and 6, preferably spot welded together. Fly 5 has a plurality of riblike indentures horizontally disposed and in close relation with each other, as shown in Fig. 6, while ply 6 consists of a smooth field portion having a plurality of channel members 1 spaced apart, vertically positioned, and secured thereto by welding, as shown in Fig. 5.

Being so arranged, it will be seen that the ribs of plate 5 and the channels of plate 6 transversely cross each other as reinforcing means to resist deflection of a side thrust of the plastic substance while being poured or rammed.

It will also be seen that the ribbed side of the panel will be placed inward at the time of assembling the form and the channel elements, being outward, and the said panels being connected at their abutting edges by an interlap, as shown in Fig. 8, rendering the joint fluid tight' and smooth adjacent the wall. The said panels each have apertures 8 punched a spaced distance from the upper and lower ends, and centrally thereof, and being spaced apart horizontally to correspond at intervals with the solid portion of the walls that divide the hollows formed by the cores, at which point, selectively, a tie rod 9 extends therethrough to bind the panels in spaced relation and in parallelism with each other. There is also provided for each tie rod a hollow spreader I0, rectangular in cross section through which said rod extends, the spreader functioning as a separator for the panels, and supported in vertical alignment and in registry with their respective apertures in the panels by a bar 5 I, channellike in cross section, and being punched through its web to receive said spreader securely therein, and the said ducts being apertured along their four sides through which plastic substance will enter to fill the hollow, and the said tie rods extend outward through their respective apertures in the panels and through an apertured timber I2, as shown in Fig. 13, the ends of the rods being bent at right angles and stapled as at C as a convenient securing means to avoid separating of the panels. To remove said panels, the bent portions of said rods are brought to an alignment to freely slide from engagement with their respective apertures provided therefor, and upon removal of the panels the outward extending portion of the rods are removed by cutting the same flush with the plastic wall.

The said forms above described, when set in position to receive plastic material therein, the top of each core will be closed temporarily by a cap l3 as a shield against said plastic substance entering the core, and the said caps being perforated as at D respectively, and in which is secured one end of anchor rods E, while the other ends are secured in their respective apertures F and G in the panels and legs of said channel bar II, by which means the upper end of the core is concentrically maintained to the panels and channel bars, while the lower ends are retained in like position by gravity, seated on the foundation of the wall.

The substance from which the wall is constructed may be of an aggregate similar to that of concrete, or a fibrous pulp may be employed and well tamped as placed in the forms. In case of the latter, an electric or other heating element may be placed downward in the hollow of the wall to assist in drying the pulp when rapid action is desired in a course of construction.

It will be understood that sub-jambs or the frames may be placed in the forms for window or door openings, and the said panels and cores being arranged to conform thereto. Furthermore, nailing blocks may be applied within the forms, seating in the wall, and to which the finish or trim for the openings and base members may be attached by nailing or the application of screws, and the said blocks being secured by adhesion of the plastic substance thereto, and the said window and door frames may be placed within the sub-jamb arrangement or by removing the same, in which case, appropriate nailing blocks will be secured in the jambs of the openings. In case of wide openings, there should be provided a reinforced lintel, the ends of which will bear upon the solid portion between the hollows, by which means, ample carrying capacity is provided for joist bearings or a poured concrete floor or ceiling.

This principle of form arrangement may be applied for the pouring of basement or retaining walls, and for fire walls in the case of a business structure in a fire restricted district.

It will be seen that a wall thus constructed is adaptable for the installation of a conduit, also flues by an appropriate lining for the hollow of the wall, and a wall constructed of pulp is easily cut for the installation of window or door openmgs.

The forms herein set forth are preferably made of sheet metal, but not restricted to such alone, as fibrous sheets may be adopted with suitable reinforcement, in which case, it is simple to arrange for the installation of doors and windows in the wall, and such other modification may be made as lie within the scope of the appended claims.

Having fully explained my invention what I- claim as new and desire to secure by Letters Patent is:

1. A collapsible removable core form for a concrete wall comprising sides and end walls oppositely disposed, respectively, each of said end walls converging downward edgewise, the edges of each end wall being bent in such a way as to interlap to avoid collapsation by an outward pressure, a strut member converging downward edgewise to correspond with the convergence of the end walls, the said strut member engaged between the sides intermediate of their edges to avoid collapsation by an exterior pressure.

2. A collapsible removable core form for a concrete wall comprising sides and end walls oppositely disposed, respectively, each of said end walls converging downward edgewise, the edges of each end wall being bent in such a way as close the same while plastic concrete is being poured.

EDWARD L. SIEMER.

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