US1154998A - Mold for concrete columns. - Google Patents

Description

C L M E Y E R.

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M 0L D FOR CONCRETE COLU M NS.

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y Patented'Sept. 28,\1915.

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MOLD For. concentre COLUMNS.

T0 all 'whom t may concer-n Be it known that I, CHARLES L. MEYER, a citizen of the United States, residing at Omaha, in the county of Douglas, State of Nebraska, have invented certain new and useful Improvements'in Molds for Concrete Columns, of which the followingis a speci-A fication.

This invention relates to improvements in molds or forms for concrete pillars and columns, and the general purpose or object of the invention is to cheapen and facilitate the work of erecting concrete pillars, columns,

and like structures, through an improve.`

stood when considered in connection with y the accompanying drawings, wherein I have illustrated my invention as embodied in forms or molds for the erection of square columns and generally-round columns, and referring thereto,

Figure 1"is an elevational view of a mold or form for a square column, showing the same as adapted to support a concrete floor girder or beam; Fig.- 2 is an elevational view of the upper portion of' Fig. 1, in a plane at right angles to that of the latter figure; Fig. 3 is an enlarged cross-sectional view taken on the line 3-3 of Fig. 1; Fig. 4 is' an edge elevational view of one of the clamp bars; Fig. 5 is a detail fragmentary viewof one of the channel beams in side elevation, illustrating the form'v of the apertures in the side walls or flanges thereof; Fig. 6 is a vertical longitudinal section taken through the abutting ends yof two channel-beams and the cleat or splice uniting the same; Figs. -7 and 8 are cross-sectional views through a pluarlity of channel beams arranged sideby side, with the cleats which connect vertically alined beams, taken in the planes indicated by the lines 7-7 and 8-8'of Fig. 6; Fig. 9 is an enlargederosssectional view, similar to Fig. 3, showing a mold or `form for a column of generally-4 round formation in cross section; and Fig. 10 isan edge view of one'of the main clamp bars employed 1n the'structure of Fig. 9,

Specification of Letters Patent.

PatentedSept. 2 8, 1915.

Application led March 12, 1915. Serial No. 13,906.

In the embodiments of the invention herein illustrated, the` unit ,of 'construction is a channel-beam section such as is shown at 11. In the erection of Va mold or form of rectangular cross-section,'such, for instance, as the square mold illustrated in Figs. 1, 2 and 3, I employ a plurality of these channel beams l1, disposed vertically side .by side, to makeup each wall or face of the mold. These channel beams, which are of uniform sizes throughout (except in cases where two opposite sides of the column are carried higher than the tw'o intermediate sides to facilitate the formation of a concrete girder or beam of less width than the column at the upper'end of the latter, as shown in Figs. 1 and 2), are fo/rmed'with oblong apertures 12 through the. side walls or flanges thereof at intervals throughout their length, said apertures preferably lying4 close to the inner surface of the web of the beam. In assem bling, the requisite number of beams to form -each side of the mold are laid'side by side,

with each other,l after which the entire assembly forming each side is raised to vert i cal position, and the several sidesv` are brought together into correct relative posi-V 1.'

tions,.the rods 13 maintaining the alinement ofthe individual units duringl this operation. By giving the apertures 12Ithe 'elongated form illustrated, the supporting rods of two opposite sides are adapted to overlie or underlie the ends of the supporting rods of the two intermediate sides, without necessitating any specialselection of beams for. any particular side. The sides of the mold having been thus erected, they are securely bondedy together by a series ofduplicate clamp bars, each of which comprises a straight, flat body-portion 14: that is provided with a groupof relatively offset or staggered, elongated apertures 15, and a loop 16 at one end. These bars lie edgewise l'against the outer edges of the flanges of the channels, as clearly shown in Fig. 3, with ythe apertured body portion of each bar extending through the loop 16 of a bar on an adjacent side. driven through that one of the apertures 15 Wedge blocks 17 are then of eachmbar which lies just outside the loop 16 of tihe coperating bar, this obviously tending to draw and clamp the bars tightly around, theshell of the mold, thus-bonding the units of the latter securely together and preventing outward yielding or spreading of the walls from the internal pressure of the fresh concrete.

Where the column is of such Iheight as to require the erection of the mold or form in two or more superposed sections, the said sections are united at their meeting joint by cleats, herein shown as consisting of short channel-beam sections 18, of slightly less width and thickness than the main channelbeam sections, Jnesting withinand overlapping the joint 19 between the latter. Preferably, and as herein shown, the side walls .orflanges of the cleats are cut away inwardly of the ends of the latter to enable thel bling `rodsl, whichv additionally tie the cleats in place and preventy any relative endwise movement between the cleats and the main channels. Fig. .1 of the drawings illustrates. two superposedl mold-sections united by cleats in the manner described; and Figs. 1 and 2 also show channel units 11 of increased length relatively to the channels used throughout the principal height of the column to facilitate the formation of a mold 20 at the top of the column for a cross beam or girder 21.

In the erection of the mold of a generally- ,round column of polygonalv external form, such as is `shown in Fig. 9, the same structural units 11 are employed, all the units being connected up laterally by running rods or stiff wires 22 therethroughv before erection, then flexing the assembled group of beams into the generally-round form shown, and twisting the ends of the rods or wires together as shown at 23, thereby creating a temporary bond suficient to maintain the form of the mold while the bonding clamps are applied. 'A column of this cross-sectional form, of course, requires a somewhat larger number of clamp bars, the arrangement shown in Fig. 9 being 4practicable, wherein the four main 'clamp bars 14 are connected up as in the square form shown in Fig. 3, andy additional diagonal or oblique, plain bars 24 are interposed crosswise of the corners of the frame formed by the main bars 14, the auxiliary bars 24 being Vforced against the sides of the mold by wedges 17. If desired, the main clamp bars 14 may, in this instance, be providedwith apertured keepers 25,as shown in Fig. 1.0 secured thereto by rivets 26, for the reception of the ends of the diagonal bars 24, to prevent any edgewise cantingof the latter, and the channel-engaging edge of each diagonal clamp bar 24 may be out away, -as illustrated at 27, to adaptsai'd diagonal bars to a bearing upon the flanges intermediate the flanges -engaged by the main bars.

j From the foregoing it will be evident that l by constructing the shell of the mold or form out of units identical in shape, size and structure, which -units'are capable of being assembled to produce. any desired cross-secmaterial and labor, especially where the unit of structure selected isa standard structural beam. The described means for laterally bonding the shell is obviously adapted to a wide variety of sizes and shapes of molds,

' and can be very easily applied and removed.

The alternating or staggered arrangement of apertures in the clamp bars to receive the wedges renders these clamp bars practically universal for any sizes within the longitudinal limits of the bars themselves.

While I have herein illustrated my invention as embodied in amold for a concrete column, and contemplate that such will be its principal application, it will be evident that the same is applicable to and useful in molds for other concrete structures, such as girders or floors. Hence the invention is not to be understood as limited in its application to column molds exclusively.

I claim:

1. A mold for concrete structures, adjustable as tol cross sectional form and comprising a pluralityof channel beams of uniform size disposed in edge-to-edge contact around a longitudinal axis, the llanges of said beams having laterally registering apertures, Stringer rods or wires slidably mounted in registering groups of said apertures and serving to bring and hold said units in correct lateral registration, and means for bolnding said channel beams together lateral i A mold for concrete structures, adjustable as to zcross sectional form andcomprising a plurality of channel beams of uniform size disposed with their channelsides outward and in edge-to-edge contact around a longitudinal axis, the outwardly extending flanges of said channel beams having laterally registering apertures spaced nat intervals throughout the length of the structure, stringer rods or wires slidably mounted in registering groups of' said apertures and serving to bring and hold said units in correct lateral registration, and tie-bars embracing the edges of said flanges and bonding said channel beams together.

3. In an adjustable mold for .concrete 'tional form of column, and are capable of structures, the combination of a group of channel beams of uniform size disposed in edge-to edge contact around a longitudinal axis, the flanges of said channel beams having laterally registering apertures, a second like group of Vchannel beams disposed in 1ongitudinal alnement with said irst named group and abutting the latter vendwise, the flanges of said second group likewise having laterally registering' apertures, channelshaped cleats nested yWithin and lapping the abutting ends of the beams of said groups, the flanges of said c'leats having apertures registering with the apertures in the flanges of said beams, Stringer rods or Wires slidably mounted in the registering. apertures of said beams and' cleats, and means for bonding the beams of said groups together laterally.

o. LoUIs MEYER.

Witnesses:

Aivros THOMAS, ARTHUR V. JESSEN.

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