US1769282A - Concrete form - Google Patents

Description

A. L. ALIN CONCRETE FORM Jul 1, 1930.

Filed Jill izs. 192v:-

1 INVENTOR H82 1.. 0/07 In the drawings:

Patented July 1', 1930 entree STATES AKE L. ALLEN, or SPOKANE, WASHINGTON CONCRETE mm Applicationffiled 311113 25,

' My invention relates to forms "for use casting concrete and refers particularly to forms whichare-adjustable in size to provide finished concrete shapes of 'diiferent dimen- 5 sions.

It isithe practice erecting concrete structures to provide forms to determine the finished shape ofthe structure. These forms usually are constructed :of wood erected es pec'ia'l ly for the purpose are removed when the concrete has set. "It is necessary to 'erect a form for each structure and to provide'fo'rms of different size for-different sized structures. The labor of assembling, erecting and remov ingthe formsm ust be gone through witheac'h time t'hey'are used. 7 7

It is an Object of my invention to lessen materially the labor necessary to erect and remove a concrete form. I a

'Another'obj'ect of invention-ism provide a form which can'be used a plurality of times without total dismantling each time.

Arurther object of my invention is to rovide a concrete "form'whic'h'can be utilized on concrete shapes of different sizes. r A further objectof my invention isto provide a concrete form whichcan be put in position and dismantled quickly and easily.

An additional object of my invention is to prov-idea simple locking device forfian adjustabl'e concrete'fo rm. v

My invention possesses other advantageous features, some of-which with the foregoing 'willbe se'tf forth'at length in the following description where I shall outline in full that form of-the concrete form 'Ofmy invention, which I have selected for illustration in the drawings accompanying and forming part of the present specification. In'said drawings Iliave shown-one form of concrete form embodyingmy invention, but it is to be'understood that I do not limit myself tosuch form since the invention, as set forth in the claims, *may be embodied in a plurality lof' forms.

Fig. 1 is aside elevation of aj form ofj m y invention adapted for u'se with a column.

Fig. 2 is an enlarged detail "ofa corner 'of v p j metaland'c'onvenientlyjoinedtothe railgby the several'beuse. Preferably the plates are the form of my invention.

""5 Fig-58 is across section'ofthe form of my 1927. Serial No. 208,091.

invention adjacent 'a corner, the plane o'f section being indicated by line 3+3 in Fig. 2.

In its preferred embodiment," the concrete form' of my invention preferably comprises a plurality of walla-each wall being made up of a pair of rails movable towardand away from each other in "fixed; relationshipfand each being provided with a pl-ate, the plates overlapping to form a continuous confining surface-for the concrete. T v

The adjustable form "of' my invention is capable offavariety 'of uses and is described herein as adapted for forming columns "of concrete. It of coursecan be used in making "beams and "other structuralunits but finds 565 perhaps its widest range of applicability to columns. In making the form of-my invention, I ,preferablyprovide a pair offrails 6 and? which conveniently can be metal shapes such as angles. The rails generally are dis posed in parallel relationship although in some instances they can be inclined. As disclosed in the drawing, the rails are preferably parallel and areoined by means for permitting them to be moved toward and away from each other but at the same time maintaining their parallelism."

These means preferably comprise a. plurality of bars8, Which also can be metallic angleajoining the rails. The bars'are aper- Jt-ure'd at each end and are pivoted to the rails at, suitably spaced points. Preferablyythe bars are spaced farther} apart adjacent the top of the form asgthe 'load'in that region is not as great as it is adj aeent the bottom where the bars :are more closely spaced. The "plurality of pivoted-bars '8 permit the rails 6 and 7 to be moved toward and away from each other with some longitudinal ior axial displacement but at the same time maintain the rails 'in'parallel relationship. A convenient form of pivotal'connection between the rails and the bars 8is by means of fiat headed bolts 19 and nuts 10 which permitthe dismantling of the'various portionsif desired. I I To form an abutment for retaining the concrete. within theform, each of the rails 6 and (is provided with a plate 1'2, usually ofsheet of thin section and overlap adjacent the midportion of the bars 8. The overlapping plates permit lateral expansion and contraction of the rails relative to each other but nevertheless provide a substantially continuous wall for the retention of concrete.

Means are provided for retaining the two rails 6 and 7 in fixed lateral adjustment and these means conveniently take the form of apertures 13 passing thru the plates 12 for the reception of suitable fastening means such as stove bolts and nuts for securing the plates 12 together. This provides an adjustable fastening means for maintaining the widt-h of the wall formed by the plates and fails at a fixed amount. A plurality of such apertures 13 permit-various lateral widthsto be given the wall. f V j The usual column is rectangular in transverse section and I therefore usually provide four of the described expansible walls to encompass the space for the column. The four walls are joined together by suitable fastening means which can quickly and easily be placed in position. At each corner, the angles 6 and7 are preferably disposed as shown in Fig. 3. On each angle 6 and abutting. the corresponding plate 12 is a strip 14 which extends for the entire length of the angle and is adapted to lie against the plate 12 of the adjacent angle 7. Against the strip 14 is a strip 16 on angle 7 which extends for the full length of that angle also but is interrupted at intervals to accommodate the heads of the bolts 9. V e

To hold the strips 14 and 16 in close abutment to prevent the escape of any concrete thru the joint at the corner, I provide a plurality of wedges 17 preferably aflixed to the angles 6 at intervals throughout their length and which can be suitably attached thereto as by welding. Adapted to cooperate with the wedges 17 are a corresponding number of tie strips 18 spanning the adjacent angles and overlying the wedges. Each tie strip at one end is hooked to fit over the cooperating wedge 17 and at the other endis also hooked to slip over the projecting portion of angle 7. When the tie strips 18 are forced downwardly over their corresponding wedges 17, they force the two angles 6 and 7 into abutting relationship and, together with strips 14 and 16, provide a very tight junction. The tie strips can readily be forced into place with a hammer and can as readily be released.

Thelongitudinal movement of the'rails 6 and 7 to vary the lateral width causes diflerences in the total length of the Walls, and for that reason I have provided means at the top and bottom of my form to continue the plates 12. At the top of the column I provide a plurality ofoverlapping sheets 19 and 21 which arev suitably bolted together. These sheets preferably lie withinthe overlapped plates 12 and are secured in place by perforated anerected and locked in position.

heights and contours to accommodate a beam or other shape extending across the top of the column.

At the bottom of each of the walls formed with my device, I usually leave an aperture to permit cleaning out of the interior of the form, or the aperture can be sealed by a clean out plate 24 of suitable configuration which will seat between the plates 12 and the lower cross bar 8. The clean out plate 24 preferably is held in place by a tongue 26 projecting from the adjacent angle 6 and, passing through a perforation in the plate. A key 27 passing through a similar perforation in the tongue holds the plate 24 in place.

In using the concrete form of my invention,

tened together by suitable bolts passing through apertures 13. The extension sheets 19 and 21 are then bolted to the plates 12 at each side and the four walls arethen erected to vertical position with their lower ends positioned within the collar. Vhen thefour walls are erected, the tie strips 18 are applied to the angles 7 and the various wedges17, and are driven into place. The form' is thus After the four walls are erected, the extension sheets 19 and 21 are joined togetherand the securing strips 22 are fastened in place. When the interior of the form has been cleaned, the clean out plates 24 can be moved into positionand the form is ready to receivev the concrete.

I claim: t V j V 1. A concrete form comprising a pair of overlapping sheets, a rail on each of said sheets, a plurality of bars pivotally attached to both of said rails, and means for retaining spaced position. 7 V

3. A concrete form comprising a pair of intersecting walls, a flange on each of said walls, said flanges being in abutting relationship, a plurality of wedges on one of said flanges, and a plurality of tie strips'engaging the other of said flanges and said wedges for securing said walls in position.

- A c n r m QQmP n a pluia r ,tions for maintaining said rails in selected of abutting walls arranged to form a po1yhe-.

my hand' AKE L ALIN

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