US1712631A - Combination tie and spreader for concrete molds - Google Patents

Description

May 14, 1929. J. c. NELSON COMBINATION TIE AND SPREADER FOR CONCRETE MOLDS Filed Feb. 26, 1925 fizl/em Z4074 fOhA/C. NELJON .5 a H g r -MM 47-7-0 FPNEYS' tented May 14, 192 9.

G. NELSON, OF MINNEAPOLIS, MINNESOTA, ASSIGNOR TO NELSON SPREADER- llIE COMPANY, OF MINNEAPOLIS, MINNESOTA, A

COMBINATION TIE AND SPREADER FOR CONCRETE MOLZDS;

CORPORATION OF IMIIlINESO'JI'A.

Application filed Febru y 1925- 'seflal HEISSUE 1 This invention relates to new and useful improvements in combination t1es and spreaders particularly adapted for use in the con-' struction of concrete molds, etc., to prevent a the uprights of the mold from spreading and also to provide abutments or spacers for the wallsof the mold thereby to retain them in true parallel relation.

An object of the invention is to provide to such a device of simple and inexpensive construction, preferably, of unitary structure and termed of sheet metal,so that they may be manufactured at a minimum cost.

A further and more specific object ofthe.

to invention is to provide a combination tie and spreader having a main body portion of angular cross-section, comprising two webs of varying lengths, the ends of one web providing abutments for the walls of the mold to prevent their collapse and the projecing ends of the other web being adapted to be secured to the mold uprights to prevent spreading. V

The particular object of the invention therefore is to provide a combination tie and spreader for concrete molds.

Glther objects of the invention will appear from the following description and the accompanying drawings and will be pointed out in the annexed claims lln the drawings there has been disclosed a structure designed to carry out the various objects of the invention but it is to be understood that the invention is not confined to the enact features shown as various changes may be made within the scope oi the claims which follow,

lln the drawings:

Figure l is a perspective view of a portion at a concrete form or mold showing the improved tie and spreader mounted thereon;

Figure 2 is a partial plan view of Figure 1 showing the preferred method oi securing the device to the uprights ol the mold;

Figure his a perspective view of a portion oil the concrete wall with the mold removed therelrom showing the tie and spreader mounted thereon; and a Figure (l is a perspective view of the comhinfation tie and spreader removed from the wail.

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la the selected embodiment of the inven here shown, there is illustrated. a por tion of a concrete form or mold comprismg the usual uprights 5 and the side walls 6 which are usually constructed of lumber.

The novel combination tie and s reader featured in this invention prefera ly includes a main body portion of angular crosssection comprising two webs of varying lengths. The relatively shorter web 7 is adapted to depend into the mold and the ends thereof provide abutments 8 adapted to engage the inner upper faces of the mold to prevent such walls from collapsing. The other web 9 of the device is preferably arranged at right angles to the web 7 and is adapted to be arranged in a substantially horizontal position on the upper edges of the walls As shown in Figures 1 and 2, the projectmg ends 11 of the device are preierably turned at right angles with reference to the main body portion of the web so that their fiat faces may engage the sides of the uprights as shown in Figure 2. Suitable apertures 12 are provided in the projecting ends 11 to receive suitable fastening means such as nails 13, shown in Figure 2. 'lhe terminals of the end-portions ll of the web 9 may be bent around the edges oi the up rights, as shown in Figure 2, in order to more securely tie the two uprights together to prevent spreading thereof, when concrete is poured into the mold.

By: means of this novel device, it will readily be seen, by reference to Figures 1 and 2, that when the tie and spreader is posi tioned in the mold and secured to the uprights, it will be impossible for the walls of the mold to collapse and likewise it will be impossible. for the uprights to spread as a result of the projecting end-portions ll oi the web 9 being secured to the sides and edges or the uprights. The abutments 8 ol the de pending web 7 also provide a spacing means for the opposed walls of the mold thereby to retain them in true parallel relation.

Referring to the drawing, particularly Figures 1 and a, it will be noted that the turned portions 1d of the end-portion ll. are preferably-spaced a distance from the abut ment ends 8 oil the spacing web l, thereby providing the flat portions it which are adapted to engage the edges oi" the boards of the mold walls, as will be clearlr under stood by reference to Figure l, y thus Flt lild

forming the end-portions 11 the boards, from which the walls of the mold are constructed, may be closel fitted together so that the wall, when 7; com eted, will be comparatively smooth an even.

In the use of this novel tie and spreader, the mold will be constructed as shown in Figure 1, the walls 6 and uprights 5 being securely tied together by means of the device as hereinbefore described. After the concrete has been poured and the wall set sufficiently to permit removal of the mold, the nails 13, securing the spreader ends 11 to the uprights, will be withdrawn after which the uprights and also the walls6 of the mold may be disassembled, thereby leaving the tie and spreader embedded in the concrete as shown in Figure 3. The projecting end-portions 11 may then be cut off by suitable means such as a pair of pliers after which the main body portion of the tie and spreader will be substantiall embedded and concealed in the concrete wa l, as shown in the lower portion .ofFigure 3.

These novel ties and spreaders are preferably made in various lengths dependent upon the size of the mold with which they are to be used, which size is determined by the thickness of the proposed wall, it being understood that the over all length of the depending web,

7 will determine the inside Width of the mold and therefore the thickness of the concrete,

wall when completed.

The construction of this device is also very simple and inexpensive as it is preferably of unitary structure and constructed of sheet metal thereby providing a device which may be manufactured at a minimum cost.

Having thus described my invention what I claim as new and desire to secure by Letters-Patent, is:

1. A combination tie and spreader of uni tary structure for concrete molds having a main body portion comprising two webs, the ends of one web providing a spacer for the mold and the projecting strap-like ends of theother web having a partial twist therein so that the fiat faces of said ends may engage and partially encircle the mold uprights and be secured thereto to prevent spreading of the mold.

2. A combination tie and spreader of unitar structure for concrete molds having a ho y portion comprising horizontally and vertically disposed webs, the vertical web being relatively shorter and having its ends adapted to engage the inside of the mold to provide a spacer therefor, the projecting ends of the other web being twisted at right angles to the horizontal lane of said web and having their faces a apted to engage the mold uprights and said projecting ends also being apertured whereby they may be secured to the uprights to prevent spreading of the mold.

3. A combination tie and spreader for concrete molds comprising two integral webs of sheet metal, one of the webs being relatively shorter than the other and adapted to have its ends abut the oppositely positioned walls of a mold to form a spacer therefor, the end portions of the relatively longer web being adapted to extendbeyond the exterior of the walls, said webs being disposed substantially at a right angle to each other so that the outwardly extending portions of the longer web may rest upon t e upper edges of the walls and the shorter web may longitudinally extend between and have its ends abut said opposed walls, and each end portion of said longer web having a quarter twist therein whereby it may be engaged with a mold-upright and secured thereto.

4. In combination with a concrete form comprising side walls secured to exterior vertically arranged supports, a member formed of bendable sheet metal to provide a body portion of V-shaped cross-section including a laterally projecting spacing web against which the side walls abut to definitely space them apart, bendable straps integral with the body portion and forming continuations of the ends of the portion, said straps extending through the side walls contiguous to the vertical supports and being bent around the supports to snugly embrace the latter, said straps having openings therethrough, and fastening members extending through the openings and driven into the supports for positively securing the straps against displacement, to thereby prevent spreading of the walls under the action of plastic concrete when poured into the form.

5. As an article of manufacture, a combined spacing and tie member formed from a single sheet of bendable metal to provide a rectangular bod portion bent along a longitudinal medial line into V-shaped cross-section, straps forming continuations of 'the ends of the body portion at one side of the medial line so that the body portion provides at the other side of the medial line a spacing web against which the side walls of a form are adapted to abut, said straps adapted to be bent around exterior supports of the form and having openings therein through which fastening members are adapted to be extended to secure the straps to the supports.

6. As an article of manufacture, a combined spacing and tie member constructed to provide a strip having a spacing web projecting laterally from its central portion and bent along alongitudinal line so that the central portion is angular in cross-section, the end portions of the strip providing bendable straps adapted to be bent around supports of a concrete form so as to co-operate with said web in tying the walls together in definite spaced relation.

hinecl spacing and tie member constructed to form so as taco-operate with said web in provide a body portion having a laterally protying the walls of the form together indefijecting spacing Web against the ends of nite spaced relation. M which wells of a, concrete form are adapted In witness whereof, I have hereunto set to abut, andjoendable straps forming continmy. hand this 18th day of February, 1925.,

nations of the ends of the body portion adapted to be bent around exterior supports of the JOHN C, NELSON.

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