US2284149A - Construction form - Google Patents

Description

, May26,1942. E, E. JONES 2,284, 9

' CONSTR CTI Filed Jan; 29, 1940 2 Sheets-.Sheetl 2 Sheets-Sheet 2 Filed Jan. 29, 1940 INVENTOR.

Patented May 26, 1942 f 2,284,149 constrauc'rronronm Earl E. Jones, Houston, Tex. Application January 29, 1940, Serial No. 316,102-

6 Claims. 01. 25 -1315) j I I, I

This invention relates generally to concrete forms and particularly to those of the inverted pan type used in the construction of concrete floors, ceilings and the like. It has for its general object the provision of an improved pan type form and an improved means of arranging and supporting the same.

In the past, various arrangements have been resorted to for the support of'pan type forms. Chief among these are constructions in which the inverted pan type of form is made up in a plurality of relatively short lengths and these lengths are placed in overlapping relation upon wooden beams and supporting structure customarily referred to as centering.

In the conventional construction the oVerlaD- ping of the sections just referred to produces a finished concrete structure which, when the forms are removed, shows seams at the points where the forms overlapped. The structure is thus somewhat unsightly in that it does not possess a smooth exterior surface where it was in contact with the forms. In addition to the fact just noted, the conventional forms require a considerable amount of carpenter work in building the wooden supports which not only support the pans along their opposite edges and extend from one end to the other of each joist formed bythe pans, but in many types of pans the woodwork actually forms the bottom surface of each of the joists and is for this reason known as centering. It is, furthermore, necessary in such construction that the woodwork be removed, at considerable cost of labor and time, before the metal pans can be removed and, due to the manner in which the pans are mounted on the woodwork, this removal almost invariably results in a certain damage to the pans, shortening their useful life and tending to damage them so that theycannot be reused.

It is, therefore, an object of this invention to provide forms of the general type referred to, which may be easily and quickly removed without damage to the forms and reused many times.

It is another object of this invention to provide forms of the general type referred to, which require a minimum of temporary support.

Another object of this invention is to provide such forms in which the overlapping of the pans will be unnecessary and by which a much neater finished job may be produced.

Another object is to provide such forms which will have a very long life compared with the life of the present conventional forms.

Other objects and. advantages of this invention will become apparent from-the following descrip tion taken in connection with the accompanying drawings, wherein is ,set forth one embodiment of this invention. In the drawings: 7 e I Figure 1 is .a perspective view illustrating forms constructed in accordance with this invention, together with a preferred manner of mounting the same. I

Figure 2 is a transverse cross section through a portion of two adjacent pans-of the nature illustrated in Figure 1, showing the same after the concrete flooring has been poured therein.

Figure 3 is a longitudinal cross sectionthrough one of the'pans illustrated in Figure '2- and through the flooring which has been poured thereon, this figure illu'stratingthe manner-in which the ends of the pan forms are mounted within the pans and on the Wooden supports for the forms. 1

Figure 4 is a perspective View of one of the end members shown in Figure-3.

Figure 5 is a perspective View of one of the locking. keys for securing together the abutting flanges of adjacent pans.

Figure 6 is a view illustrating forms shown in Figures 1 to 5 inclusive, with an additional thicker joist.

Referring now more specifically to the drawings, there is shown in Figure 1 the manner of mounting forms constructed in accordance with this invention. As shown, each of the pans is of inverted channel shape, having a top I and sides 2 extending downwardly from the top. At the lower edge of each of the-sides 2, each of these pans is turned outwardly in a direction parallel with the top to form a'flange 3 adapted to extend horizontally when the form is in place and to serve as a centering along the bottom of the joist. Each of the flanges 3 is turned downwardly at 4 and perforated at intervals as shown in 5 for the purpose of receiving a locking key 6.

Each of the pans illustrated rests at its oppo-.

quate bearing forsupporting the pans. The

flanges 4, however, will serve to stiflen the portions -3 and make it possible for each of the pans to bridge the entire space between adjacent support members 1 without any intermediate supthe use of the I inserted member for producing a port such asthe usual wooden centering or shoring. r

p The. support members 1 will be secured either to walls II) or to suitable supports l I; which may also serve as supports .for the bridging 'joist' The ends of the pans are closed by means of lower edgesof these 'end'members extend down-- wardly below the inturnedend edges [51:0 form a g projection 16. Each of the endmembers I3 is of a size such that the inturned edges I4 and I5 Willi; just fit within the end of a panand substantially.

close the same. The downward extending pro- The lower extremities ofthe inturned endpor tions are adapted to I seat themselves 'upon the e members are not secured inpositionby any-means I upper edges of the support members 1. The end whatever except by being clamped between the support members 1 and the adjacent soflitor other part. The support members -1 may be se cured in place either by'nailingorby asuitable beam tie suchasillustrated at-H.

The pansim'ay be transversely strengthened soas to carry the weight of a heavy body of concrete either by forming the pans: of corrugated *nature in a well known manner or by bracing them with small angle irons [-8, or-thelike, suitably secured in place to the undersidepf the top portions lofthepans. j

maybe easily and quickly dismantled and removed after the concrete has set. In fact, it has been found that upon removal of the support members] and the end members I3, the pans will in most instances drop out of their own weight. -The construction is such that the removal of the pans and end members does not in any way damagethem or render them unsatisfactory for further service, and thus not only is the expense of placingand removing the forms substantially reduced, but the forms themselves are of much longer life than the forms of con- .ventional construction. It is apparent by the construction shown in Figure 6, joists of any de- 15 jecting edge It is adapted to fit between thej. support member 1 and the adjacent wall or soifit...

s'ired'widthmay be produced without eliminating :fromjthe forms any of the various advantages j secured by the other partsrof the construction.

- Having'described' my invention, I claim:

1.'-In combination, a pair of inverted channel shape'pan' type forms having laterally extending lower edges with dependingflanges, means for securing said flangestogether to form a stiffening rib endmembers received'by' said forms to close theends-the'reof, each of said end members being free from lateral-projections which would prevent'it from fitting entirely within'i'said forms and having a downwardly extending part;.and a single support bar extending transversely beneath saidform adjacent each end thereof, said bars forming the sole support for said forms and endmembers.

2 In combination, an open end invertedjchan- 'lnel-shape pan typefo'rm', an end member received The iriturned upper edges 14 0f the endmem bers may be perforated at, l9, if desired,'for the purpos'eof receiving'suitable projections in the end of the pamand thus prevent possible slippage of the end member with respect tothe-p'an. 1 Each of the end members may also be provided'with a special angle shaped portion '20 on its inner surface adapted to receive awr'ecking' bar2 l,fl0r' the I like, in {the manner illustrated in Figure -3, for

the purpose of pulling against the end-member in removing the forms after the concrete has set.-

The key 6' for securing :together ,the down turned edgeslof the pans is illustrated more in by and'closing each end of said -form and keeping said pan from collapsing, and-a single support bar extending transversely beneath said form adjacent each'end thereof, said bars forming the sole support for said form and saidend members, whereby when said support is removed said end members may b'e removed and said'form then collapsed and removed; 7 r I 3'. In combinatioman open end inverted chane net-shape pan type form, an end member for detail in Figure 5 and consists essentially of "a relatively flat member capable of passing through the perforations} formed in the flanges 4 :and having notches 2|" formed in its opposite edges so that after insertion into said perforations it may be turnedby means or a handleportion '22 to positively and tightly secure the'do wn'turned flanges 4 of adjacentpans-to each other.

If it be desired to provide a wider joist than that forwhichthe pan's'are originally 'made, a

suitable spacer 23 may be provided, having on each of its opposite edgesdown turned flanges 24, corresponding to the flanges and adapted to be securedto-the flanges t in the-same manher that the flanges l aresecured to each other in the set up shown in Figs. l to 3,inclusive.

' From the foregoing it will be appreciated that a construction :has been provided in which the overlapping of pans insettinglup forms has been eliminatedrand also inywhichthe usual extensive. shoring and supporting is rendered unnecessary.

closing-each endjo'f said fo'rm and keeping saidpan'from collapsing, said end members'being free from lateral"projections whichwould prevent downward movement of said-end members after concrete or the like has been "poured over said form, said-end members each having-a downwardly projecting part projecting belowthe lower edges of said form, and asingle support bar'extending transversely ofgs'aid' form adjacent each end thereof, said bars'having notches in their upper surfaces adapted to'receive the edge portionsof safi'd forms and having apart adapted'to receive and clamp said downwardly extending It willfurther be seenthattthecustomary center- 7 ing beloweach joist has been eliminatedby the. construction provided, =and .that the forms are such that they maybe easily andiquicklywase,

sembled without the -use',o'f skilled labor and without the necessity for, extensive work and shoring construction. 7

It is 'further apparentthat the forms provided part of each of the end members respectively, said bars formin'g the sole supportfor said forms and end members, whereby when said support is removed said end members may be removed and said form then collapsed-and removed.

4. In combination, a pairof inverted channel shape pan type forms having laterally extending loweredges-with depending flanges, said flanges abutting each other, means for securing said flanges together to form a stiffening rib, end members received-by-saidforms to close the ends thereof, eachof saidend members-having a downwardlyextending'part and support means beneath said forms having openings receiving said stifie'ning rib, flat surfaces supporting said laterally ex- 4 tending lower edges of the forms, and separable carpenter parts embracing and clampingbetween themsaid do wardly extending-parts on saidend mem- 5. In combination, a pair of invertedchannel shape pan type forms having laterally extending lower edges with depending flanges, said flanges abutting each other, means for securing said lower edges with depending flanges, said flanges abutting each other, means for securing said flanges together to form a stiflening rib, end members received by said forms to close the ends thereof, each of said end members having a downwardly extending part and support means beneath said forms having openings receiving said stiifening rib, flat surfaces supporting said laterally extending lower edges of the forms, and separable parts embracing and clamping between them said downwardly extendinglparts on said end members, said supportmeans forming the sole support for said forms and end-members, whereby when said support means is removed said end members may be removed and said forms then collapsed and removed.

' EARLE. JONES.

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