US1599035A - Knockdown form for molding concrete - Google Patents

Description

Sept. 7 1926.

I w. E. BAUMBERGER KNOCKDOWN FORM FOR HOLDING CONCRETE Filed Nov. 9, 1525 2 sheets-Shejepi m t a, @7 y V ail-02 72 Sept. 7 1926. v 1,599,035

w. E. BAUMBERGER KNOCKDOWN FORMIFOR MOLDING CONCRETE Filed Nov. 9, 192 2 Sheets- Sheet 2 ing- "Additional objects and advantages Of- Patented Sept; 7, 1926;

i q to 1,599,035

vsmrr'rrin n satf imsnenn, or sanFRANcisoo, CALI ORNIA.

xnocxpowiv'ronn FORVMOLDING concan'rn Application filed-November 9, .1925. serial No. 67,834

: 'l hespresent invention relates to I knockdown fOlflIlSiOl molding concrete, especially for columns, beamaand the like,

- The: principal:objectfof the. invention is to provide a knock-'dowmform whichcan be used an indefinite numbeigof times, A furtherobject is to providesuch a formv which is adjustable to different sizes. Astill, fur:

therfobjectwi's to eliminate, to a large eX- tent,'the use.of bolts, nuts, or. other small special; fittings which are easily .lOSt. ;A

still further object is to provide a, form of ample strength-and rigidity to prevent bulgthe invention'will be apparent from the followingispecification, which mustbe read with the: understanding that the proportion, arrangement, and form of the several parts; may ,be. varied, within the limits of theclaims hereto appended, without depart-- j 'ing from thespirit ofithe invention as set forth in said claims It is alsoto be, understood that, the invention, although particu-" .larly adaptable for molding columns, beams 'andfthe like,'ma'y be, embodied in .forms of other shapes without material change,

With this in View, a preferred embodiment of the inventionwill'now be fully described with reference toithev accompanyingdrawings, wherein:

Fig. 1 is an elevation of my complete form.;:- U

Fig. .2 is a longltudlnal 880131011 enlarged of oneof the corner channel members,'showing the splicing member for joining two units together, and is takenv onthehne 2 -2 -ofFig..3.w p H j Fig.3,is a transverse section takenon the line,3.3"of Fig.2. I

iFig. 4j-is. atransverse section, enlarged,

of the complete form, and is taken on the line H of Fig. 5.

-: Fig,i..5i;is: a. side elevation of the"tra nsverse jointiibetween .two adjacent unitsrfl Fig. -6=.is"a: perspective detail of theoupper example, thieeYsuch' units are shown in Fig. L'designated A, B, and *Crespectively. All are identical in construction,;and:. are-- built the form being up of four corner sections with intervening side sections, the transverse dimensions of governed bythe Width'o'f saidslde sections The corner sections are all identical, and i x PATENT OFFICE.

each j comprises a longitudinally disposed channel member 1, Figsj l to 7 preferably: iron orsteel, and positioned at an angle of degrees tov the sides of the form, as

shown. To the sides ofthis channel memher are secured, as by nails 2, longitudinally. I

disposed flat, members 3, preferably Wood,

which complete the vcorner, section of the' unit. The edges of the members 3 are out at anangle of 45 degrees, to abut against the sides of thechannel member 1. Obviously, V a

if the cross section of" the column to be molded be otherthan rectangular, as for example hexagonal, the angular dimensions given above would be vari-edaccordingly.

The corner section isfurther held together and strengthened by gussets, there being preferably one such. gusset at each end of the section, and as many in betweenas ay;

benecessary. VThe end gussets only are showninthe drawings, however. Each gusset comprises an ang'ularly formed transversely disposed plate member-4, preferably iron or steel, provided with flanges 5 at its end regions, and said flanges are permanently secured to the backs of the flat members 3 by screws, rivets, or bolts indicatedv at 5, and a triangular flat plate 6 reinforcing the centralbent or, angular re gionof said plate member 4 and secured thereto in any desired manner, not shown. The gussets thus constitute rlgid angular reinforcementsfor the corner sections, holding the membe s 1 and 3 together in thenproper relative positions. Said gussets also provide flanges, extending outwardly from thecorner sections by which they may be connected; together, ,as will, be described hereinafter.

The intervening side sections, which are separable fromtthe corner sect ons above described, are, longitudinallydisposed flat members 7 preferably wood, and are fitted gto theycorner section members 3 by splayed or rabbeted joints 8. Obviously one or more such'fiat members maybe used-to make up each side section- 7, or, in molding small columns, the side sections may. be ensed with entirely. In molding horizontal cams,

the form or unit 'may consistonly of two n s c o as'sh s w o i a taining bars 9, preferably metal. Said locking barsv are provided with suitable connecting means which in their best form comprise angularly disposed notches 10 formed in the edges of said bars, the notches at the two end portions ot'each bar being reversed in direction, as shown. These notches 10 register with apertures 11, Figs. 6 and 7, formed in the gusset members t and 6, there being preferably three such apertures in each gus-' set, so that pins 12, Figs. 1 and 5, may be dropped through to lock the bars 9 and the corner sections together. The side sections 7 are retained in position by the splayed joints-S and by the bearing of their outer surfaces against the bars 9.

The angular arrangement ot' the notches 10 in the locking bars 9 makes for ease in assembling the structure, without impairing the cfi ect'iveness of the lock, for, the greater the lateral expansive force upon the unit, the more securely are thepins 12 retained in said notches; and by providing a plurality of such notches in each bar, the same bars may be used for units of different dimensions.

IVhen'two units are placed end to end, only one set of locking bars need be used at the joint, said bars lying between the gussets of the adjacent units, as shown in Fig. 5, and

the pins 12 being passed through both gussets and the intervening-bar. Said gussets, pins, and bars thus serve to connect the two units, but as a further connection, and to add rigidity to the joint, I prefer to employ the parts shown in Figs. 1, 2 and 3. These comprise splicing bars 13 lying longitudinally within the channels 1 of the corner members and extending across the joints, and clamping screws 1% adapted to bear. against the outer faces of said splicing bars, said screws being mounted in bridges or yokes 15 secured to the open sides of the channel members. As a further precaution I prefer to provide the inner faces of the bars 13 with teeth, as shown at 16, adapted to engage correspondinglytoothed blocks 17 secured to said channel members 1. Thus when two or more units arejoined together, end to end, both by the pins 12 and by the connecting bars 13, a rigid columnar form is provided; j a

It will be obvious that the'splieing' bars 13 may be relied upon exclusively to make a rigid joint between adjacent units, especially in comparatively light work. This construction is indicated in Fig. 1', in which the units Band C are provided with gussets at 1,599,035 a W- l their upper ends only, their lower ends being held against lateral expansion by being connected, through the agency of the bars 13, with the gussets and transverse locking bars 12 of the upper ends of the sections A and B respectively. The use of the splicing bars 13 also permits the adjacent units to be spaced slightly, as shown at 17 in Fig. 2, it such spacing be desired for any reason. In this case, the bars 13 not only connect the adjacent units, but bear the weight of the upper unit as well. The teeth 16 prevent slipping, and provide for reasonably close adjustment of the space 17.

As a further means of strengthening the joints between the ends of adjacent units, I may shift the side sections 7 longitudinally with respect to the corner sections, so that the joints between the ends of said side'sections are out of line with those of the corner sections, as indicated at 18 in Fig. 1. A

short filler piece 19 may be employed at the bottom of each tier of side sections to produce such broken joints. The bottom of the complete form may be secured in any desired manner to a suitable base indicated at 20.

In order to preserve the wooden members 3 and 7 from the deleterious effects of the concrete, I prefer to employ a lining 21, Fig. 4;, which may be made of any suitable material, as for example sheet metal, and which may be held in position by any suitable.

means not shown in the drawings. Such lining may have any desired surface form. For example, I have shown it as corrugated, to produce a rough or corrugated surface upon the concrete for the better adhesion of plaster or other coating subsequently applied.

It is to be noted that my form requires no bolts, screws, or other special small parts capable of being lost easily, with the exception of the pins 12, and for these pins I prefer to use ordinary nails of suitable size. The clamping screws 1 1 are screwed through the yokes 15, and, if desired, some well known means may be employed for preventing their removal. All other parts are of such a size as to keep them from being easily lost or broken.

Having thus described my invention, what I claim as new and desire to protect by Letters Patent ofthe United States is 1. In aknock-down form for molding concrete, a corner section comprising a longitudinally disposed channel member; flat members secured to the sides of said channel member and having their faces angularly disposed toward each other; and a substantially transverse gusset secured to the backs of said fiat members to hold them and said channel member in their relative positions.

In a knock-down form for molding concrete, acorner section comprising an ob.-

lique longitudinally disposed member; flat members secured to thesides of said oblique member and having their faces angularly disposed toward the face thereof; and a substantially transverse gusset secured to the backs of said flat members to hold them and said oblique member in their relative positions.

3. In a knock-down form for molding concrete, a corner section comprising lOIlglillldb nal mold members angularly disposed toward each other, and a. substantially transverse gusset extending across the backs of said members for holding them together, said gussetcomprising an angular member'bent at its central region and provided with flanges at its end regions for attachment to said mold members,and a triangular reinforcingplate secured'to the bent central region of said angularmember.

crete, a corner section comprising anobliquelongitudinally disposed channel member; flatmembeis secured to the sides of said channel member and having their faces angularly disposed with respect to the face thereof; and means for holdingsaid channel member and said flat members in their relative positions.

5. A knock-down form for molding concrete comprising a plurality of cooperating corner sections having substantially transverse apertured flanges pr0 ect1n g from their backs; a plurality of locking bars surround-v ing said corner sections, said bars'having inclined notches in their edges adapted to register with the apertures of sa dfianges;and

connecting pins; removably seated said apertures and notches. I 1 I.

6. A knock-down form forvmolding concrete comprising a plurality of cooperating corner sections having substantially transverse apertured flanges projecting from their b cks; a locking bar extending acrossthe backs of said corner sections and lying adjacent the flanges thereof, said bar having 111- clined notches in its edge adapted to register with the apertures of said flanges; and connecting pins removably .seated in said apertures and notches.

l. In a knock-down form for molding con- 1 7. A knock-down form for molding concrete comprising a pair of corner sections;

gussets secured to the backs of said corner I ner sections each comprising an oblique longitudinally disposed channel member and flat memberssecured to thesides of and angularly disposed toward said channel member; means for releasably holding said corner sections together; and lining members within the form and positionedto cover the faces of said flat members. I

9. In-aknock-down form for molding concrete columns and the like, a plurality of corner sections each comprising an oblique longitudinally disposed channel member and flat members secured to the sides of and anber; means for releasably holding said corner sections together; and lining members provided with corrugated inner faces, positioned within the form and covering said fiat members.

10. In a knock down form for molding concrete, a pair of units positioned end to .end, each unit comprising longitudinally disposed corner sections and intervening side sections, the o1nts between the ad acent ends 7 of said side sections of the two units, lying ina different transverse plane from that of the joints between the adjacent ends of said corner sections; means for separably con-- 'necting the sections of one unit with those,

of the other unit; and transversely disposed means for separably connecting the sections of one unit together,

In testimony whereof I have signed my name to this specification.

WALTER E. BAUMBERGER.

gularly disposed toward said channel mem-

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