US2352783A - Demountable form for poured concrete - Google Patents

Description

July 4, 1944. R. L. GEER DEMOUNTABLE FORM FOR POURED CONCRETE Filed Feb. 10, 1941 s Sheets-She et 1 FIVE-Prop Qzsaell 1,. Gear Y mow-29's v July 4, 1944'. R. L. GEER 2,352,783

DEMOUNTABLE FORM FOR POURED CONCRETE Filed Feb. 10, 1941 3 Sheets-Sheet 2 m '7 Quasefl A. Gee) OaTTOmEyJ R. L. GEER DEMOUNTABLE FORM FOR POURED CONCRETE July 4, 1944. 2,352,783

Filed Feb. 10, 1941 26 re @6 i H J/H g5 20 3 Sheets-Sheet 3 mad Qg/Lszse// 1.. Gee)" Qllrrowys MM. QfA V v J.

Patented July 4, 1944 DEMOUNTABLE FoRMroaPoURnn CONCRETE Russell L. Geer, Grand Island, Nebr.

Application February 1941, Serial No. 3.78,169.

7 Claims. (01. zt si The present invention relates to demountable. forms for poured concrete, and has particularlyto do with the problem ofprovidingformsof such character for use in making walls of angular or corner configuration. H l

One general object ofthe invention is to provide a novel andsimplified system of elements which can be easily erected, or taken down, in forming a poured concrete wall .of angular con-- figuration.

More specifically, it is an object of the invention to provide an improved, demountable corner form' arrangement such that a minimum amount of change in the same is requiredin setting up forms for walls of a wide variety of thickness.

Anotherobject is to provide an improved form.

of structure such-that it can beused in forming the merging corner between either twoor'three wall forms, as the requirements of aparticular. structure may dictate. j

"The invention also resides in various improvements and innovations in the corner form :arrangement disclosed, by-virtue of which ease of erection anddismantling; simplicity of manipulaticn, and wide flexibility of use, are all combined in an extremely simple and rugged structure of low cost. 7

Further objects and advantages of the invention will becomeapparent as the following description proceeds, taken in connection with theaccompanying drawings in which:

Figure 1 is a fragmentary perspective view of a form embodyingthe invention.

Fig. 2' is a detail perspective view of a crosstie clamp included in the arrangement of Fig. 1.

Fig. 3 shown in Fig. 1.

Figs. 4 and 5 are detail perspective views of, respectively, a cross-tie bar and key included in the apparatus of Fig. 1.

Figs. 6 and 6 are diagrammaticplan views showing, respectively, the structurally separate form parts and assembled form parts for a form constructed in accordance with the present invention. v v

Figs. '7 and '7 are diagrammatic views correspending to Figs. 6 and 6 but showing the elements used in a form'for a'wall ness than that of Fig. 6.

Figs. 8 and 8 are diagrammaticjviews also corresponding toFi'gs. '6and 6 showing the-form elements arranged for a T-shaped corner juncture.

While the invention is susceptible of various modifications and alternative constructions, I haveshown in the drawings and will herein'describe in detail the preferred embodiment, but it is to be understood that I' do not thereby intend togiimit the invention to the specific form disclosed, but intend to cover all modifications i an enlarged plan View of the'form of lesser thick the inner edges of these wooden plates.

and alternative constructions falling within the spirit and scope of the invention as expressed in the appended claims.

In the exemplary construction (see Figs. 1 and 3) I have shown' the invention as embodied in a demountable formassembly for a poured con crete wall, comprising, inbrief, a corner form A- ticularly' described and claimed in my copending application S. N.-345,296, filed July 13, 1940.

Herein Lhaveclescribedonly so much of the wall.

form arrangement as coacts directly with the elementsof the corner .form.A.

The corner form A comprises innerandouter form elements, designated generallyas J2. and i3. respectively, which define between.them ;a wall cavity of right .angular or. .L.-shape. .to receive the poured concrete. l .The forms. I.2.and 13 include. mold wallsfl-of. angularuconfiguration.

which constitute, in effect, continuations of,., or

merge with, the mold [walls J0. and. H of the.

wall forms B and buttfrom which they are structurally separable--.

Turning now to the details of the. outer corner form [3, it includes. two right angularly .disposed mold wall or mold boardv sections made. up. of an outer layer of rough lumber i4 coveredby an inner facing l5 of smooth sheet material such as plywood. A cove I6 .(Fig. 3) presenting an arcuate inner face extends along the juncture between these two mold wall sections--.

On the exterior of the; mold .wall sections for the outer corner form 13 is a reenforcing arrangement including a vertically extending angle iron H which embracesthe corner juncture :of the mold wall sections as well as the cove I6 and rigidly reenforces the same, being bolted .to the mold wall sections. Welded to the angle iron .11 at spaced pointsalongsthe latterslengthare a plurality ofvertically spaced L-shaped metal reenforcing members. l8v (only one of whichis here shown). These members 18 are fashioned from flat metal stockand extend generally horizontally along respective mold wall sections in .re-.

enforcing relationship. thereto. .Wooden plates or timbers l9 are screwed to the loweiafacenfv each of the L-shapedireenforcements I8 and the.

mold walls may be nailed orotherwise securedito Inlthis manner an extremely rigid and durableouter corner form i provided.

The inner corner form i2 includes as one of its principal elements an upright corner post herein shown as being a relatively heavy timber -'20 of members, strips of hardwood 23.may be secured to the edges of the wall form mold boards and strips 24 to the edges of the mold walls on the outer corner form l3 (Fig. 3). These hardwood strips and the edges of the mold boards 2| are fashioned to form tongue and groove joints as indicated. This not only affords a tight joint but also assures proper alinement of the mating portions of the mold walls.

Provision is made iorremovably securing both the outer and inner corner forms 13 and I2, respectively, to vertical reenforcing studs 25 and 2B of. the wall forms B and C. It will be observed in Figs. 1 and 3 that the studs 25 are fixed to the outer side of the outer mold walls of the wall forms and are disposedadjacent the ends thereof. Similarly, the studs 26 extend in reeni'orcing relation along the outside of the inner mold walls of the wall forms adjacent the ends of the latter. To secure theouter corner form iii to the studs 25, bolts 21 are passed through registering holes in the studs 25 and through complementally located vertical reenforcing studs 28 fixed to the exterior of the outer corner each of the brackets. Furthermore, slots 39 are formed in each of the brackets adjacent the guiding lugs 38. In each of the tie rods 31 a corresponding slot 40 is formed adjacent one end of the rod and a series ofsuch slots 4| at spaced pointsadjacent the'other endfi'Keys I! (see Figs. 3 and 5) are inserted through registering ones of the slots in the brackets and tie rods to hold them aaginst displacement with respect to each other. In the assembly of these brackets in the illustrated structure, engagement form, The studs 28 are held in place by boltsv 29 passing through apertured, angular flanges'3il on the ends of the .L-shaped members l8.

1 The studs 26 on the inner sides of the wall forms are similarly secured by through fasteners to an adjacent vertical reenforcement of the inner corner form l2. In the illustrative construction bolts 3| are disposed substantially at right angles to each other (Fig. 3) and pass through the corner post 20, projecting from the respective outer faces of thelatter. These through bolts 3| are each threaded in a pair of nuts 32 welded together and countersunk in the respective innerfaces of the corner post. It will be noted that the mold boards 2| cover these countersunk nuts.

The drawing together of the complementally located uprights of the corner and wall forms, by the through bolts Zland 3|, may also serve to cause these uprights to grip and hold in position clamps or brackets 33 which are included in .the .cross tying arrangement for the wall forms. In the present instance the clamps 33 have been shown as being of a novel form described and claimed in my copending application S.- N. 345,296 referred to above. Upon reference to Fig. 2 it will be seen that each of the brackets 33 is fashioned as a unitary structure from a single metal plate having a body portion 34 whichis generally square in outline. From two adjacent edges of this body 34 integral ears 35 and 36 are bent to overlie in spaced relation the opposite faces of the body 34. The cars 35, 36 thus define with the body apair of right angularly related channels on opposite sides of the body 34 and to receive one of the wall form studs 25 or 26, to which it is applied,

Tapering tie rods 31 (see Figs. 3 and 4) are arranged to traverse the wall form and are suitably secured to opposed pairs of brackets 33. For this purpose, the end portions of the tie rods are received between and guided by opposed pairs of lugs 38 struck out from the ear portions of in Fig. 6

of a bracket channel with any stud 25, 26 will, 'as shown in Fig. 3, dispose an ear thereof between that stud and the complemental member 20 or 28. When the associate through bolts 21 or 3| are tightened, the brackets will be secured in place. i v

The versatility of the sectionalized system of forms described can best be appreciated upon reference to Figs. 6 to 8*. The transverse ties have, been omitted from these figures for clarity. In Fig. 6, I have shown diagrammatically the parts of a corner form A and wall forms B and C priorto their assembly in the configuration indicated It should be noted that the ends of the inner and outer corner forms are substantially alined with each other in a direction transverse of the wall cavity which they define between them. This being the case they are, when assembled, properly alined with respect to the complemental ends of the wall forms which are in similar alinement with each other. It is obviously a simple matterv to bolt the corner form elements l2 and I3 to the wall forms tov effect a strong rigid structure, and equally simple to unbolt them and disassemble the form for use at another point and without injuring the form parts.

In order to set up a formfor a wall of somewhat lesser thickness, such as that indicated in Fig. 7 and still maintain the transverse alinement of the ends of the wall forms, it is necessary merely to use a set of form elements like that indicated in Fig. '7 whichis identical with those of Fig. 6, except that the inner corner form I2.

Figs. 8 and 8 In this instance the form elements areused to define a generally T--shapecl v wall cavity such as is used at the juncture of three wall forms B, C and D. In this'case two inner corner forms [2 are utilized together with'a filler wall 43, which may be simply a plain section joining the adjacent and-alinedouter mold walls for two of the wall forms.

From the foregoing it will be appreciated that I have provided a wall form arrangement of extreme simplicity. Its heavyreenforcement'injsures great ruggedness and strength, though its general simplicity makes it.low in cost as well as simple for even the unskilled to use. Because "of the variety of shapes and'sizes of walls which can be easily and economically assembled and disassembled on many successive work sites because the versatility or flexibility of shapes in which the parts can be erected makes it suitable for the variations that may be encountered in each new job.

I claim as my invention:

1. A form for poured concrete comprising, in combination, a pair of demountable Wall forms disposed at an angle to each other, each of said wall forms comprising a pair of opposed mold Walls defining a wall cavity therebetween for poured concrete, said mold walls having vertical reenforcing members fixed to their outer sides adjacent their respective ends, cross-ties joining the opposed mold walls of said wall forms, means including brackets having portions lying on the end edges of said reenforcing members for removably securing said cross-ties in place, inner and outer corner forms including mold walls of matching configuration disposed to joinrespectively the inner and outer walls of said wall forms, the outer ends of said corner form mold walls being substantially in alinement with each other in a direction transverse of the respective arms of the cavity defined therebetween, each of said L corner forms having. vertical reenforcing members fixed to the outer faces of their respective mold walls and extending adjacent the outer ends thereof, and means for removably securing said vertical reenforcing members on said corner forms to the adjacent reenforcing members on said wall forms and drawing them toward the latter to clamp said portions of said brackets between the adjacent reenforcing members on the wall and corner forms.

2. A form for poured concrete comprising, in combination, a pair of demountable wall forms disposed at an angle to each other, each of said wall forms comprising a pair of opposed mold walls defining a wall cavity therebetween forpoured concrete, said mold walls having vertical reenforcing members fixed to their outer sides adjacent their respective ends, inner and outer corner forms including mold walls of matching configuration disposed to join respectively the inner and outer walls of said wall forms, said mold walls of the corner form being disposed in abutting edge-to-edge relation with said mold walls of the wall forms and having tongue and groove connections therewith along the abutting edges thereof, the outer ends of said corner form mold walls being substantially in alinement with each other in a direction transverse of the respective arms of the cavity defined therebetween, each of said corner forms having vertical reenforcing members fixed to the outer faces of their respective mold walls and extending adjacent the outer ends thereof, and through fasteners for drawing said vertical reenforcing members on said corner forms against the adjacent reenforcing members on said wall forms and at the same time seating the coacting elements of said tongue and groove connections.

3. In a demountable corner form for a poured concrete wall, the combination of a mold wa l presenting two angularly disposed sections having a vertical line of juncture, a vertically extending angle iron fixed to the outer side of said mold wall and extending along the line of juncture between said angularly disposed sections, and a plurality of generally L-shaped reenforcing members rigidly fixed to said angle iron at spaced points along the latter's length, said reenforcing members being disposed substantially in horizontal planes with their arms embracing the mold wall sections extending in reenforcing relation along the outer surfaces of said mold wall sections.

4. In a demountable corner form for a poured concrete wall, the combination of a mold, wall presenting two angularly disposed sections having a vertical line of juncture, a vertically extending angle iron fixed to the outer side of said mold wall and extending along the line of juncture between said angularly disposed sections, a plurality of generally L-shaped metal reenforcing members rigidly fixed to said angle iron at spaced points along the latters length, said reenforcing members being disposed generally horizontally with their arms embracing the mold wall sections and extending in reeenforcing relation along the outer faces of said mold wall sections, and wooden plates extending along the arms of said L shaped reenforcing members and fixed thereto as well as to said mold walls.

5. In a demountable corner form for a poured concrete wall, the combination of a mold wall presenting two angularly disposed sections having a vertical line of juncture, a vertically extending angle iron fixed to the outer side of said mold wall and extending along the line of juncture between said angularly disposed sections, and a plurality of generally Lshaped metal reenforcing members rigidly fixed to said angle iron at spaced points along the latters length, said reenforcing members being disposed substantially horizontally with their arms extending in reenforcing relation along the outer surfaces of said mold wall sections, and said L- shaped members having integral means on the outer ends thereof for attachment of the same to adjacent wall forms.

6. In a form for poured concrete, the combination with a demountable wall form adapted to define one side of a wall cavity near a corner thereof, vertical reenforcing means fixed on the outer side of said wall form adjacent the end thereof nearest the corner, a cross tie supporting bracket having a portion lying on the end edge of said reenforcing means, a corner form mold wall disposed to join said wall form, vertical reenforcing means fixed to the outer face of said corner form mold wall and having a surface for abutment with the reenforcing means on said wall form, and means for drawing and securing the reenforcing means on the corner form mold wall and on the wall form together with said portion of said cross 'tie bracket lying between adjacent surfaces of said reenforcing means.

'7. In a form for poured concrete, the combination with a demountable wall form adapted to define one side of a wall cavity near a corner thereof, vertical reenforcing means fixed on the outer side of said wall form adjacent the end thereof nearest the corner, a corner form mold wallv arranged for edgewise abutment with said wall form, the meeting edges of said wall form and said corner form mold wall having a complemental tongue and groove connection, reenforcing means fixed to the outer face of said corner form mold Wall and presenting a surface opposed to a surface on the reenforcing means on said wall form, and through fasteners providing connections between said reenforcing means operable to draw them securely together and at the same time seat the complemental elements of said tongue and groove connections.

RUSSELL L. GEER.

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