US2045789A - Elevating form for casting hollow concrete walls - Google Patents

Description

J. T. MCDOWELL LEVATING FORM FOR CASTING HOLLOW CONCRETE WALLS June Sgo, 1936.

Filed June '28, 1955 'v ATTORNEY.

Patented June 30, i936 t nrs PAT oFFicE ELEVA'EING FORM, FOR CASTING HOLLOW CNCRETE WALLSv .ll ames T. McDowell, Denver, Colo.

Application June 28, 1935, Serial No. 28,831

3 Claims. (Cl. .Z5-131) It is desirable under certain conditions to form i3; and maintain the latter in rigid spaced relathe walls of cylindrical concrete storage bins with tion. Curved beams Il extend entirely around vertical air passages throughout the wall area. the form to stiffen the plates l2 and I3. Y Such a construction is shown in copending appli- The HerameS are spaced apart at Suitable in 5 cation, Serial No. 726,662. tervals around the form, and are supported upon This invention relates to a concrete form conjack rods I8 which are cast into the concrete and struction by means of which the vertical passages eXtenOl upwardly therefrom. A tubular jack shaft in the wall can be continuously formed as the wall I9 Surrounds each 0f the .lack rOdS, and iS held increases in heighth. from downward movement thereon by means of 10 Another object of the invention is to combine a ratchet clamp 2t. The jaCk Shaft iS rotated 10 with a vertically traveling mold for casting a conthrough the medium of a head 2l so that it will crete wall means for forming Vertical passages thread itself through a nut positioned between within the wall so that no additional labor will be the upper GrOSS mellflbersl I5. The Cross members involved to cast a wall with passages than one l5 Of the frames are Carried U-DOrl the tubular without such passages threaded shafts I9 so that rotation of the latter` 15 Other objects and advantages, reside in the will lift the frames on the rods I8. detail construction of the invention, which is Thus, after the section of wall between the designed for simplicity, economy, and eiiiciency, forms I2 and I3 has been poured and set, the These will become more apparent from the foljack shafts I9 are rotated to lift the two forms lowing description. I2 and I3 upwardly to a position to receive the 20 In the following detailed description of the in neXt POU-ring 0f C011Cretevention reference is had to the accompanying The hollow air passages II are cast by means drawing which forms a part hereof. Like nuof core forms 22 which are suspended from rods merals refer to like parts in all views of the 23 intermediate the fOrrn plates l2 and I3. The 25 drawing and throughout the description. rods 23 pass through and are suspended from 25 In the drawingzbeams 2e extending between the cross members Fig. 1 is a horizontal section through a typical I6 of adjacent frames. A circular angle bar 25 circular bin having Vertical air passages of the extends entirely around the structure between type which this invention is designed to form. the forms I2 and I3 and is secured to each of the Fig. 2 is a perspective View of a portion of the core forms 25, so as to maintain them in their 30 cylindrical bin wall illustrating the improved conproper Spaeed relation lOetWeen` the form plates I2 crete form in place thereon. and I3. The core forms 22 may have any desired Fig. 3 is a side elevation of the core form emconstruction. It is preferred to form them of ployed in this invention, partially broken away to wood, as illustrated in Figs. 3 and 4, with hollow show the interior construction. v interiors and with each form suspended from a 35 Fig. 4 is a. horizontal cross section through the pair of the rods 23. The length 0f the Core form core form of Fig. 3, taken on the line 4 4, Fig. 3, is substantially equal to the width of the form In the drawing a typical circular concrete bin plates I2 and I3. wall is indicated at I0 provided with a series of It can be readily seen that as the frames move vertical, spaced-apart air passages l I. The pres.- upwardly, they will also lift the core forms 22 so 40 ent invention is designed to cast the complete that the latter Will travel Simultaneously with the wall I0, with its air passages II, and to ascend movement of the entire form, with the rising wall so as to form an ascending With this construction, a hollow wall having form therefor to the top of the structure. vertical air passages may be cast just as readily The improved form comprises an inner form and just aS rapidly as a Solid Wall Since the core 45 plate I2 and an outer form plate I 3. The plates forms interfere in no way with the usual wall I2 and I3 are circular, the inner plate forming the pouring procedure. inner diameter of the desired structure and the While the invention has been described as parouter plate I3 forming the outside diameter of ticularly applicable to casting a circular wall the finished structure. The two plates are mainsuch as used in storage elevator bins and the like, 50 tained concentric with each other by means of it is of course not limited to this particular use, H-frames having vertical side members I4 tied but can also be used for casting a straight, holtogether by upper and lower cross members I5 low wall. and I6, respectively. The legs of the H-frames I4 While a speciiic form of the improvement has extend downwardly over the form plates I 2 and been described and illustrated herein, it is de- 55 sired to be understood that the same may be varied, within the scope of the appended claims, without departing from the spirit of the invention.

Having thus described the invention, what is claimed and desired secured by Letters Patent 1s:-

1. An elevating form for continuously casting a hollow concrete wall comprising: a pair of H- frames, the legs of which extend downwardly over each face of' said wall, an inner form plate extending between the legs on the inner face of the wall; an outer form plate extending between tljle legs on the outer face of the wall; a cross beam extending between said H-frames over said Wall; a series of pairs of vertical rods extending downwardly from said cross beams; and aV core form surrounding each pair of rods between said face plates.

2. An elevating form for continuously ,casting a hollow concrete wall comprising: a pair of H- frames the legs of which extend downwardly over each face of said wall, an inner forni plate extending between the legs on the inner face of the wall; an outer form plate extending between the legs on the outer face of the Wall; a cross beam extending between said H-frames over said Wall; core forms suspended from said cross beam between said faceplates; means for elevating said H- frames; and a tie member secured to and extending between the upper extremities of all of said core forms.

3. In an elevating form for casting concrete Walls, said form consisting of lH-frarnes connected by inner and outer wall form plates, means for supporting core forms therein comprising: a horizontal beam extending between said H- frames; a series of spaced-apart core forms; a pair of `vertical parallel suspension bolts extending upward from each of said core forms through said beam; and a longitudinally extending tie member secured to each of said core forms and extending along their upper extremities below said beam, said bolts being suiciently long to suspend saidrcore forms a substantial distance below said beam so as not to interfere with the pouring of said forms.

JAMES T. MCDOWELL.

Images