US2669000A - Form and holding means therefor - Google Patents

Description

Feb. 16, 1954 w. A. SEEMANN FORM AND HOLDING MEANS THEREFOR 2 Sheets-Sheet 1 Filed March 8, 1952 8 WILLIAM A. SEE/MANN INVENTOR HUEBNER, BEEHLER,

WORREL 8 HERZ/G ATTORNEYS WWM Feb. 16, 1954 w. A. SEEMANN ,669,000

FORM AND HOLDING MEANS THEREFOR Filed March 8, 1952 2 Sheets-Sheet 2 w x m WILL/AM .4. sEEm/v/v INI/ENTOA HUEBNER, BEEHLER,

WORREL 4: 1159216 ATTORNEYS Patented Feb. 16, 1954 UNITED STATES PATENT OFFICE FORM AND HOLDING MEANS THEREFOR William A. Seemann, Piedra, Calif.

Application March 8, 1952, Serial No. 275,587

7 Claims. (Cl. 25-131) The present invention relates to concrete forms and the like and more particularly to the combination of such a form with improved holding means therefor.

In the construction of dams and other massive structures formed of concrete, it is the usual practice to pour the concrete in successive batches which when hardened are so integrated as to form the resultant structure. It is the usual practice to permit preceding batches to set preliminary to the pouring of a successive batch so that the preceding batches are utilized to hold forms and such batches themselves frequently constitute portions of the form. It is the usual practice to embed anchor pins, referred to as hair pins, in predetermined positions as each new batch of concrete-is poured so that the pins can be used in anchoring the forms in new positions for successive batches. In mounting the forms on the previously located anchor pins, the forms temporarily are held in desired position by means of cranes or the like and drawn tightly against the previously set batches of concrete by means of she bolts extended through the forms and screw-threadably tightened onto the anchor pins.

The conventional practice just described, is subject to certain disadvantages which the instant invention has overcome. The she bolts are exposed in positions where they are frequently struck by buckets of concrete lowered adjacent thereto for adjacent pours. Inasmuch as the buckets of concrete are of great weight, the she bolts are snapped ofi whenever engaged thereby. Inasmuch as the she bolts are relied upon to hold forms in place, the breaking thereof is of serious consequence, normallyrele'asing forms held thereby permitting displacement from precisely predetermined position. If the form has already received fresh concrete which has not yet hardened, such a release of a portion of a form results in a waste of concrete and jeopardy to workmen and materials working or positioned in proximity thereto.

' The removal of a broken she bolt is a difl'icult and frequently hazardous task. Its replacement is a time-consuming operation. The cost of the she bolts thus broken in dam construction is frequently large. For example, in a large dam currently under construction, $100,000 worth of she bolts were broken in the pouring of the first million cubic yards of concrete.

An object of the present invention is there.- fore toprovide an improved holding means. for

:concrete forms and the like.

2 Another object is to eliminate the expense, inconvenience, hazard, and waste incident to the breaking of she bolts in concrete construction, as described above.

Another object is to provide a combination of concrete form and holding means therefor in which the holding means is housed by the form and thus shielded from damage.

Another object is to provide a holding means for concrete forms of the character described in the preceding paragraph which are adjustable so as to facilitate precise form positioning.

Further objects and advantages will become apparent in the subsequent description in the specifications.

In the drawings:

Fig. 1 is a perspective of a dam under construction showing forms positioned for subsequent batches of concrete, illustrative of the operational environment of the subject invention.

- Fig. 2 is an enlarged foreshortened vertical section taken on line 2-2 of Fig. 1.

Fig. 3 is a fragmentary side elevation of a combined form and holding means embodying the principles of the present invention.

Fig. 4 is a horizontal section taken on line 4-4 of Fig. 3.

Fig. 5 is a vertical section taken on line 5-5 of Fig. 3.

Fig. 6 is an enlarged fragmentary elevation of a portion of the form shown in Fig. 3.

Fig. '7 is an enlarged fragmentary vertical section taken on line 1-1 of Fig. 3.

Fig. 8 is a side elevation of a holding means embodying the principles of the present invention, a portion thereof being shown in vertical section and foreshortened for illustrative convenience.

Fig. 9 is a top plan view of an anchor pin utilized in mounting concrete forms.

Referring in greater detail to the drawings:

In Fig. 1, a partially constructed dam of concrete is indicated generally at H) for illustrative -purposes only. The dam is shown as formed of an upstream layer II and a downstream layer 4'2. As shown, the upstream layer has progressed higher than the downstream layer and thus the upstream layer is utilized as a portion of a form for pouring each successive batch of concrete in the downstream layer. Further, it will be noted that successive islands of concrete l3 are upwardly extended from each layer in spaced relation so that islands also constitute portions of a form for successive pours.

, =Mcyable iorm' sections l5 are conventionally and bolted into position by means of the? she 2 bolts by operators supported on retractable catwalks 1% pivotally mounted between the stud.- dings 16 for retraction inwardly between the studdings. The catwalks are supported in. outwardly extended position by means of cables l9, shown in Fig. 2. point is essentially conventional. and attention is now directed to the improvements of the present invention.

In a manner which will subsequently become apparent, anchor pins. 2?. are embedded; in; the concretein sets of vertically spaeedpinsarranged in predetermined positions. As shown in. Figs. 8' and 9, each anchor pin preferably has: a. corrugated portion 23 and a male threaded:- portion 21; The corrugated portion is preferably con.- fined to a common plane to which the male threaded portion: is an'gularly relayed.

As evident in Figs. 7 and? 8, an elongated: bolt 26 having a tapered end portion 2.? is provided in which an internally threaded bore 28 is'iiormed which is releasably engageable with the male threaded portion 24 of the. anchor pins 22'. Each of the bolts has. an opposite end providing a wrench head 29 and an elongated externally screw-threaded portion 30 adjacent'tathewrench head.

A thimble 32 is provided having a. hollow substantially cylindrical central sleeve: portion. 313.

The sleeve portion has an inwardly turned end providing anannular shoulder 34 defining a bore 35 concentrically of the sleeve. For descriptive convenience the end of the sleeve portion; provi'ding' the annular shoulder is referred to as. the

substantially closed end and: the opposite end of the sleeve as the open end The sleeve: portion 33 is loosely mounted on the bolt 2% with. the bolt slidabl'y positioned in the bore 352 with the wrench head 29 thereof within the sleeve and the tapered end 2 7 extended endwardly of the sleeve. A nut 3-1 is screwthreadably mounted on the threaded portion 30' of the bolt within the sleeve engae'eable with the annular shoulder' 34*.

The thimble 32 also provides a mountingp-late 4'0 lweldably secured thereto, or cast. integrally therewith, and radially extended incircumscribing relation to the open end 36' of the sleeve portion.

A plurality'of bores 41 are formed through each of the form sections #5 in long'i tudinally spaced relation in each of the studdings: l6. Each of the bores is substantially larger than the bolts 26' and are preferably elongated longitudinally of the studdings inasmuchas a wider range of vertical adjustment is required in positioning the form sections than the range of horizontal adjustment. A. counterbore it is formed in a1ignment with each of the boresand similarly is preferabl'yverticallyel'ongated' for adjustment purposes. The counterbores 43' are: oppositely disposed in the studdingsfrom the planks t1 and recessed areas 44 provided there-about.

Operation The operationand utility of the present'im The structure described tothis vention are believed to be clearly apparent and are briefly summarized at this point. For descriptive convenience, it is assumed that a pre vious mass of concrete has been hardened with the anchor pins 22 arranged therein in predetermined positions. It will be observed that the pins are embedded in the concrete with the threaded portions 24 thereof housed in pockets 46 formed in substantially erect surfaces 47 of the concrete mass". The threaded portions 24 are substantially horizontally disposed.

Preliminary to forming an island on the upstream layer H, as illustrated in Figs. 1 and 2, any-required. number of form sections iii are positioned against the surfaces ll and upwardly extended therefrom in cantilever arrangement. The. bores 42. and counterbores #33 are aligned with the pockets 5% and the bolts 26 extended thrcu'gh' the bores and counterbores and screwthreadably mounted on the anchor pins 22. This isv conveniently accomplished by an. operator supported onthe catwalks it while the form'is supported. in position by a crane. or the. like. Any suitable socket wrench adapted to. lit the wrench head 29; may be employedv to tighten, the bolt onto the pin and tightly to seat the tapered end- 21 of. the bolt in; its pocket 46..

The operator then slides the thimbles 32. into the counterbores 31 with, the annular shoulders "i, the sleeve portions 33 areloosely fitted to the bores Nuts 3? are screw-threadably mounted on the bolts and. drawn inwardly against the; annular shoulders. 34. also by means of any suitable. socket wrench. not. shown. The rose 5.4. substantially larger than the moon 1g plates. at, so that preliminary-to tightening the nutsinto' place, theiorm sections may be precisely positioned. Subsequent. to tightening of. thennts the form. sections. are, dependably held position against the: surfaces 41".

It willbe: noted in Fig- 2 that the: lower ends of studsv it are notched at' 9 and inner adjustment nuts 51') screw-threadably mounted. onthe bolts 2'6 in engagement, with the studs. The extent of the notching is exaggerated in the drawing; more clearlyto show thestruciture. When the. notched portions; 6.9; are as deep as shown in Fig. it is necessary to employ thimbles of somewhat reduced length, for obvious reasons. By adjusting the nuts 3.1 and the ad ustment nuts 53 inwardly outwardly on their bolts 2-6;, the precise attitude, within. relatively narrow limits, of the up. wardly extended studs, l6 and the planks; I! can be p e isely de m ned- The lowermost planks. ll are enga ed against the surfaces, 4?: and define, an upwardly extended wall therefrom- Adjacent to the upper ends of the studs: thedescribed bores 42, counterbores 43', andreeessed' areas are provided as described. Inorder to locatev anchor pins 222 in fresh concrete to be poured into the form, the thimbles 32 and bolts 26 are mounted therein as shown, and anchor pins 22 sGrew-threadably mounted in the bores 28' of the bolts in the precise; positions desired in the newly formed island or pour. To retain the bolts and thimbles in assembled relation in the bores and ccunterbores at the upper ends of the studs, screws iii: are; extended through the mounting plates ti? and engaged in the studs. The screws are employed only to hold the uppermost thimbl'es, bolts, and pins. in position while a newpour is made. finrther; if desired, a. piece of sheet metal 55 may be Emotionally mounted on each of the bolts v26, holding the pins 22 to be embedded in the new concrete, in engagement with the back sides of the form sections. The sheet metal facilitates the holding of the bolts and pins in desired positions in the forms and yet permits the removal of bolts from the bores '42 and counterbores 43 after the new concrete has hardened. The desired frictional engagement is readily achieved by simply driving the bolts through light sheets of such material preliminary to installation on their respective pins. The tapered ends 21 of the bolts 26 are preferably greased to preclude adherence of concrete thereto.

Ends of form sections I5 are interconnected by transverse form sections 53 of any suitable form bolted or otherwise secured to opposite ends of the sections I5, as shown in Fig. 1, when an upwardly extended island I3 is to be formed. When making a fill between upwardly extended islands in an elevated layer, only a pair of form sections I5 is required inasmuch as islands at the opposite ends of the fill take the place of transverse form sections 53. In forming a fill between spaced islands in a lower layer, only a single form section is required, as indicated.

When it is desired to employ a plurality of form sections I5 in endwardly abutting relation, the studs I6 at the end of the section are conveniently of only half the normal width and fitted against studs at the end of an adjacent section and thebores 42, counterbores 4'3, and recessed areas 44 formed therebetween, as evident in Fig. 3. In such instances, the mounting plates 40 span the juncture of sections [5 and dependably hold the endwardly adjacent sections in place.

When the form sections are installed, concrete is poured therebetween and settled about the anchor pins 22 and tapered ends 21 of the bolts 26. When the concrete has set, the screws 52 are removed from the mounting plates 40 of the uppermost thimbles 42, the nuts 31 released from the bolts in these thimbles and the bolts unscrewed'from their respective anchor pins 22,

leaving the anchor pins embedded in the newly I set concrete with the pockets 46 thereabout formed by the tapered ends 2'! of the bolts. Similarly, the other nuts 31 are removed, releasing the thimbles 32, and permitting the unscrewing of the bolts from the previously set anchor pins The present invention has proved dependable in holding concrete forms precisely in position. The loose fitting of the thimbles 32 and bolts 26 to the counterbores 43 and bores 42 accommodate adjustment of the form sections I 5 into precisely desired position preliminary to tightening the nuts 31 to draw the mounting plates 40 tightly against the recessed areas 44. Inasmuch as the nuts 31, bolts 26, and thimbles 32 are completely housed during use, there is no danger of their breakage or displacement incident to inadvertent engagement by heavy buckets of concrete or the like and thus, the expense of she-bolt replacement as well as the hazards, inconveniences, and readjustment expenses have been obviated.

Although the invention has been herein shown and described in what is conceived to be the most practical and preferred embodiment, it is recognized that departures may be made therefrom within the scope of the invention, which is not to be limited to the details disclosed herein but is to be accorded the full scope of the claims so as to embrace any and all equivalent devices and apparatus.

6 Having described my invention, what I claim as new and desire to secure by Letters Patent is: 1. In combination with a concrete form or the like having a bore, a counterbore aligned with the bore, and a recessed area circumjacent to the counterbore; a, hollow substantially cylindrical sleeve loosely mounted in the counterbore having an outwardly disposed open end and an inwardly disposed end provided with an inwardly directed annular shoulder defining a bore concentric to the sleeve; a mounting plate radially extended from the outer end of the sleeve slidably engaged with the recessed area of the form; an elongated bolt extended through the bore of the sleeve having an end disposed within the sleeve and an opposite end loosely extended through the bore of the form; means engaged with the extended end of the bolt rigidly mounting the bolt in predetermined position; and means adjustably positioned longitudinally of the bolt in engagement with the shoulder of the sleeve to draw the sleeve, plate and form toward the rigid mounting means for the bolt.

2. In combination with a concrete form having a bore, a counterbore aligned with the bore, and a recessed surface area circumjacent to the counterbore; a hollow substantially cylindrical sleeve loosely mounted in the counterbore having an inwardly disposed end provided with an inwardly directed annular shoulder defining a bore concentric to the sleeve and said sleeve having an outwardly disposed open end; a mounting plate rigidly mounted on the outer end of the sleeve and radially extended therefrom in sliding engagement with the recessed surface area of the form; an elongated bolt slidably mounted in thebore of the sleeve having an end disposed within the sleeve and opposite tapered end loosely extended through the bore of the form 'provided with an internally screw-threaded longitudinal bore; and a nut screw-threadedly mounted on the bolt within the sleeve in engagement with the annular shoulder thereof.

3. In concrete construction, the combination of a plurality of rigidly mounted pins having substantially horizontally disposed male screwthreaded ends; a elongated bolts screw-threadedly mounted on the screw-threaded ends of the pins in housing relation thereto and endwardly extended therefrom; a concrete form having bores formed therein loosely fitted over the bolts, counterbores concentric to the bores oppositely disposed from the pins, and recessed surface areas circumjacent to the counterbores, the bolts being endwardly extended from the pins a distance less than the combined lengths of the bores and the counterbores; thimbles loosely fitted into the counterbores of the forms having hollow central portions received in the counterbores in circumscribing relation to the bolts, substantially closed ends slidably mounted on the bolts, opposite open ends, and mounting plates radially extended from the open ends in engagement with the recessed areas of the forms; and nuts screwthreadedly mounted on the bolts within the thimbles in abutting relation to the substantially closed ends thereof.

4. In a concrete form, the combination of an anchor pin having a corrugated portion and a male screw-threaded portion adapted for embedding in a mass of concrete, the corrugated portion lying in a plane angularly related to the screw-threaded portion; an elongated bolt hav-- ing an externally endwardly tapered end portion having a longitudinal bore provided, with female screw-threads releasably mounted on the screwthreaded-end portionof the pinpannppositea Providing "a wrench .head, and an externally jscrew-threaded portion adjacent ,}to "the end of the "bolt providing .the wrenchhead; .a oth-inible ,having hollow cylindrical porition :in toil-cumzsoribingrelation to the externally screw-threaded tportion ,of the belt, a "siibs'tantiallyemsed rend is'lidably, mounted ,onhthe bolt, an open opposite lendtendwardl-y extended :f-rom the wrenh "head Tof [the bolt, and a mounting plate ,iradiallywextendedrtrom the open end .of nthe cylindrical porztion; a nut screw-threadedly mounted onithe externally screw-threaded portion of-thefbolt within -the thimble in engagement with. the substanwally-closed end of the thimble; and .a concrete ifomntproviding :a bore loosely receivingthe bolt rand; a -:oounter,b ore loosely receiving-the thimble vtherein 1 with o the mounting -.plat,e of the thimble slidablyengagedagainst the form. I

, 5.f In combination with azconcrete formhaving a m-opening therethrough, a hollow vsleeve Sloosels amounted =intheopeninguhaving an outt ardly'disposed open end and an inwardly disposed end within ;the vform provided with an inwardly di- ,rected annular shoulder defining an opening .therethroug11,-a mounting. plate radially extended ,vfrom theonter-end of the sleeve slidahly engaged against the form, an elongated bolt extended 'ithrough the opening definedtby the shoulder of the sleeve having an end disposed within the sleeve :and an opposite end extended loosely -;t-'hrough theopeningdnthe form, means engaged -with 'the extendedendof the bolt rigidly mounting theiboltiin predetermined position, andmeans adjustably positioned ;longitudinally of the bolt :within the sleeve in engagementi with the shoulder adfithe sleeve to draw the sleeve, plate "and form -towardthe mounting means 'for the-*bolt.

5.6. Releasable retainingmeans for concrete tforms and' thelike adapted for connection toan i'anchoripin comprising a flat mountingd'plate-hav- :iingan: opening centrally therein, a hollow sleeve rigidly connected to themounting plate in'registr-y twithfthezopening and extended substantially right angularly from the plate to one side thereon. the

'"Number .extended ..,end of ,the sleeve ,=havin g an L inwa y .posedface into which the bolt and nut are recessed and shielded "by the sleeve from,.inad- .vertent contact.

'7. In combination .with a concrete form having an'opening therethrough and a recessed-area circumjacent to the opening, a hollow vsleeve loosely mounted in the opening having anoutv-Wardly disposed openend and an inwardly dis- ,posed end Within the-$013111 provided with an inwardly directed'annular shoulder dBfiDiI'lgIQCOIL- striated opening therethrough, .a mountingtplate radially extended from theouter end of the sleeve sIidabIvengagedagainst the form in the recessed areacircumjacentto the-opening, an elongated shoulderextended through the opening defined by the shoulder of 1 the sleeve having :an :end {disposed within the sleeve and antopposite "end extended looselythrough vthetopening in thefform, ,means engaged within v"the extended-lend of :the bolt rigidly .mounting the bolt in -1oredetermined position, and-a nut screW-threadabl-y;mounted on the. bolt within thesleeve in engagementgwith the a shoulder of thesleeve to draw the sleeve, plate,

and form toward the mounting means :for Ith'e .bolt.

WILLIAMAPsEEi/IAmt. References Cited 'in the me of this patent UNITED STATES PATENTS Name Date I Colt Mia-n23, I937 Schenk 'Novfi30, 1937

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