US1773390A - Concrete-form clamping apparatus - Google Patents

Description

Aug. 19, 1930. s. s. COLT CONCRETE FORM CLAMPING APPARATUS 2 Sheets-- Sheet 1 Filed July 2, 1929 IN VEN TOR.

ATTORNEY I Aug. 19, 1930.

S. S, COLT CONCRETE FORM CLAMPING APPARATUS Filed July '2, 1929 2 Sheets-Sheet 2 Samuel 5;

IN V EN TOR. air,

an, A A TTORNEY Patented Aug 19, 1930 SAMUEL S COLT, OE ORA1 IGE,NEW JERSEY q me reee rmmem ermee s 'epvi e nfi ea my a 922- Se al v s *This invention relates to improved adjustahlc clamping devices for locking 'forinwalls, used in pouring concrete, in operative as- "seinbled relation. i

This invention ject to provide a novel construction and arrangement of means for adjustably mounting on the form-wall retaining bars tightening wedge devices adapted to line up and lock said retaining bars in holding relation to the form walls. To this end thetightening wedge devices include a wedge. carrier, having means to receive anend of a retaining bar, and neansto lock said carrier against displacement from its initial adjusted position on the retaining bar, together with a wedge movably related to said carrier but normally non-separable therefrom;

This invention has for furthlobjects the provision ofimprovements inthe structure whereby the wedge ismovah'ly related to its carrier, whereby firm bearing support for the operative end of the wedge is provided as part of the'carri'er; and the provision of .a construction of wedge carriers and associated wedgeswhich may be conjointly used in pairs ,to mutually "support each other in producing the desiredti'ghtening stresses on the retaining bars, or which maybe used singly in conjunction with a wedge abutment block;. all whereby the retaining bars may he squarely and tightly set up holding relation :to the assembled form walls about which they extend.

Other objects of thisinvention, having to V do with more detailed improvements in the structure and design of the novel wedge car riers and associated wedge s, and not at this time more particularly enumerate will he ill lie e od f m he fe lo in etaile descriptionofthesame.

Illustrative embodiments efthis invention m ws int iiia eexepaey es drawin s in Pie 1 i a p nfv mw n he e el g ri r fled esses e d W dg s meed We ls rin r te ins t nd e -ed in pairs l 3@I mutuallyfepoperate provide thrust abutments for the wedges, all, arranged in holding relahas for its-principal oh for retaining the wedge thereof against. disand 12 the other set ofii'orm walls whichare 'tion to assembled form walls; Fig. 2 is a fragmentary edge elevation, on an enlarged scale, viewed in the .d1rect1on ofthe arrow 09 n Fig; 1; Fig. 3 1s anenlarged plan view of a carrier and'its associated wedge as mounted 55 'used singly in conjunction with wedge abutment blocks; and Fig. 7 is a'fraginentarysectional View, taken on line 7-7, in Fig; ,6.

" Fig. 8 is a-plan View of a carrier and'its wedge showing a modified means for fixing the carrier in desired adjusted position on a retaining bar; Fig. 9 is a similar view showing another'arrangement for fixing the car? rier 1n des1redad u sted pos tion on a'retain- -ing']oar; and Fig. 10 is a plan view of a carrier and its wedge showing a modified means assembly therefrom.

* Similar characters'oireference are "employed in" all the vhereinabove described views, to indicate corresponding parts.

Referring to'the drawings, the reference character 11 indicates one set of form walls 0 arranged at right a'ngles'to the walls 10, so as to provide a mold or formof rectangular section, such as'is employed in pouringconcrete piers, columns and similar structures.

The "form clamping apparatus, according to this invention, comprises retaining bars 13, 14,15 and 1 6 of lengths exceeding thelateral dimensions of the form, thesame being adapted to hedispos'ed respectively around the respective form walls, with their adjacent intersecting ends overlapping, Adjacent overlapping ends 'of'the retaining bars 13-414 are isuit secured together by any suitable means adapted tofreta i'n the same from sep;

aration at such-points. Illustrative of one method of sosecuringsaidbars,-'I have shown, in Fig. 1, the ends of tjhe'hars providedwith perforations 17, so that a perforation- 055.011 "bar may heregistered with a perforation of the other barfand thereupon a holding pin or the like 18 passed therethrough to thus secure the bars against relative displacement. In like manner, adjacent overlapping ends of the retaining bars 16 are secured together by registered perforations 17 through which are passed a holding pin 18.

VVit-h the retaining bars arranged as above set forth, the free ends of the bars 1316 will overlap in intersecting relation, and on these free ends are then disposed the wedge earriers and wedges of the clamping devices.

Each clamping device comprises a wedge carrier consisting in a main body 19 longitudinally apertured to provide a passage 20 therethrough to receive a retaining bar whereby the wedge carrier is adjustably movable on the latter. Connected .with the inner side of said main body 19 is a laterally projecting boss or neck 21, through which extends an internally threaded opening 22 terminating at its inner end in communication with the passage 20. Threaded into said opening 22 is a set screw 23 which may be tightened to bind against a side of the retaining bar to thus hold the main body 19 in locked adjusted position on the latter. Integrally formed with the outer side portion of the main body 19 is a longitudinal portion arranged so as to form the outer side wall 24 of the passage 20, and extending longitudinally forward beyond the inner end of the main body 19, so as to lie against the outer edge of a retaining bar extending through said body 19, thereby also forming a wedge bearing 24. Extending laterally beyond the outer side portion of the main body 19 are spaced wing-plates 25 to provide a supporting slideway for an adjustable wedge member 26, which is disposed to extend through the slideway with its straight edge slidably bearing on the side wall 24 and wedge bearing 24', and withv its oblique edge outward. In order to retain said wedge member 26 in the described assembled relation to the carrier, and yet free for longitudinal movement, cooperative male and female keeper means are provided. In one form the female kee er means which is I o I provided 1n -the wedge body, comprises a de pressed longltudlnal channel or groove 27 I which is counter-sunk in a face of the wedge,

and the male keeper means, which is provided in connection with the carrier, comprises atongue or lug 28 struck downwardly out of the overlying wing-plate25, so that its free end engages in said channel or groove 27.. It will be obvious that the int-erengagement of the described male and female parts will retain the wedge'against separation from the carrier, while nevertheless permitting adequate longitudinal movement of the same. A modifiedconstruction and arrangement of cooperative male and female keeper means for retaining a wedge in assembledrelation to its carrier is shown in Fig.10, wherein the wedge member 26 is cut away along a portion of its outer side'to provide a longitudinally indented marginal way 29, and wherein the outer marginal free end portion of wing-plate 25 is bent over to provide lip 30 entered in said way 29 of the wedge. This arrangement likewise retains the wedge against separation from the carrier, while nevertheless permitting adequate longitudinal movement thereof.

Extending longitudinally of the Wedge member 26 is a row of spaced perforations 31, for purposes subsequently mentioned.

Integrally connected with the inner end of the main body 19 of the carrier is a horizontally off-set clip-member 32, which, when the carrier is placed upon a retaining bar, provides a receiving space in which may be engaged a portion of overlapping retaining bar, so that the thus associated bars are held against separation in vertical plane one from the other.

In applying the clamping devices to overlapping free end portions of retaining bars so that the former are related in mutually cooperative relation, as shown in Fig. 1, and, for example, as applied to the bars 13-16 in said Fig. 1, the body member 19 of one clamping device is engaged over the end of the bar 16 and the body member 19 of the other clamping device, in reversed position, is engaged over the end of the bar 13. The clamping devices are then moved or slid inwardly on the respective bars so that the wedge 26 of one will abut against the body 19 of the other, said wedges being each drawn outward to an initial non-wedging po sition. As thus arranged the wedges will respectively lie in overlapping planes and in intersecting relation. This preliminary positioning of the clamping devices is effected while the set-screws 23 are relaxed, and may be rapidly and easily accomplished since the main bodies 19 are then freely 'slidable on their respective bars 13-16. 7 hen the clamping devices have been thus positioned, the set-screws 23 are tightened, thus locking the main bodies against displacing movement relative to the bars on which they are respectively mounted. An advantage of the structure, having the set-screw form of looking means, is that the preliminary positioning of the clamping devices may be such as to bring all the parts of the latter into snug cooperative relation even with the wedges 26 drawn to their outward limit of movement or fullyrelaxed, and consequently the maximum tightening effect of the wedges, when the sameare driven home is obtainable, with out loss of a portion of the wedge thrust required to take upinitial slack between the cooperating clamping devices.

l/Vhen the clamping devices have been set up and locked in initial cooperative relation, the wedges 26 are driven inwardly, whereby the wedge on the clamping device mounted on the bar l3 thrusts outwardly on the clamp ing daemon the bar 1 6, and vice versa, thus drawing the bars tightlyaround the form. i It will be understood that a pair of clamp.- ing devices mutually cooperative in the manner above described are also mounted on the free overlapping ends of the barslt and 15, and that the same will be diagonally opposed to the first mentioned set of clamp-ingdevices; consequently when, both sets are tightened up by manipulating their wedges the effect will be to draw or contract all the bars into a form and tight encircling orembracing relation to the form walls.

After-the wedges of the clamping devices are driven home they may be locked against relaxation in any suitable manner, for example, either by passing a lock-pin 33- through holes in the Wing plates 25 and through a registered perforation31 of thewedge, or by oassin such a lock in 33 throiwh re isl 2: P n r:

tered perforations 31 positioned at the intersection of said wedges.

Preferably each. wedge 26' is provided at its outer .ior rearw ard end with an enlarged head-portion 34, the inner shoulder of which .forms'a-stop which, on abutting a p'ortionot the main body member of the carrier to which it is attached, serves to limit the inward movement of the wedge. Additionally said head portion 34 provides an enlarged portion well calculated to receive and withstand the blows administered to. the wedge when driving the latter home to desired tightening pomarginal notches 35, and the free end of the bearing member 2 1, which abuts the outer a edgefof the bar, may be provided with an inwardly projected spur .orlug 36. The passage 20 of the body 19 of the carrier in this ease, is made of a width exceeding that of the bar, so that lateral play of the body relatime to the bar is possible, suflicient to permit disengagement of the spur or lug 36 from a notch 35, so that longitudinal adjustment of the 19 on the bar may beattained'and selectiye-engagement ofthe spur or lug 36 with ag ven notch 35, according to the required disposal of the body in initialaset up position on the bar. Agaim for' example, as

shown in Fig. Qiapother form of carrier lock ng meansmay be ut1l1zed ,the,same comprising the prov sion in the bar of long tudr ial'lyspasd p for n 3 5 w t al gn perforations inthe horizontal wallsgoff the body pass ge .20 ith wh h el e P iration1-37- may be registered so that a holding Pin may be passed through the parts to retain the same against relative movement.

. InFigsUfi and '7 I have shownthe novel clamping device's arranged in single unit relation at each corner of a form and in cooperatiye relation with a wedge abutment block. The form,- in such case, may comprise thewalls 11 and 12, and the retaining bars lg l, 15 and 16 areemployedvto ex tend around or embrace the form walls. A single clamping device comprising the wedge carrier and its associated wedge is mounted onanend oft-he bar 16 adjacent to the point where theo latterioverlaps and intersects an end of: the bar-13, and the clamping device is locked on the bar 16 in initial holding posi- I tion. Mountedon the adjacent end of the bar 13 is an abutment block 39, the latter having a longitudinal passage through which the 7 bar 13' extends,rand' a set-screw 140 laterally threaded thereinto to fix the abutmentbloek in operative position. The inner end of the abutment block 39 has an oblique portion 3&1 corresponding to the angle of inclinationof the outer margin of the 'wedge 26. a In practice, after the carrier is fixed on the bar 16 and its wedge member 26' outwardly withdrawn to relaxed position, the abutment block 39 is slid up on the bar 13 until its oblique portion 41 engages the wedge membeligfi, whereupon the abutmei it block is secured against displacement by, screwinghome the seta I screw 450.. A carrier andassociated wedge with 'cooperatingabutment block 39 is fixed, I in like manner, to the overlapping and intersecting ends of the bars 13 and 14, 1a and 15, and 15 and 16, thus providing a clamping structure at each corner'of the form. oWhen the clampingdevices arethus-initially set' up therespective wedgemembers 26 may be driven inward; to thereby contract the bars about the"form.walls and intotight holding relation thereto. The wedge; members are then locked against relaxation by passmg holding, pins through thawing plates 25 of .thewedge carriers: and through aper f oravtion 131 of the'wedge, as alreadyabove ex.- plained 7 H i In thenovel construction of zwedge carrier and associated wedge,the provision con;- nection' with the formerot the wedge hearing portionfletris of considerable advantage;

first, for thereason thatit permits the body mem er 1 of; the ca ie t entir ly mbrace of. encircle the'barhon which-it is mounted an .SfiQOBdi'lbfiCW i pr ide a St! aadtr e bear ng- --suprert ag inst'i i wed e WW slide; and as a d 'f rom ing'the Wedge i was a t; or batte g j of tlf ewbars I am aware "that some .cha

gl t- Ig ne ili a range en s a he vari us de ice and P detailsbfthecqnst li k 1 d rei g faem hssceeeeithis i.

self to the exact details of the construction of said parts as illustrated in the accompanying drawings.

I claim Y 1.. In a form clamping apparatus having retaining bars to girdle the form with their adjacent end portions in overlapped relation, wedge carriers each comprising a main body having a passage therethrou gh to receive a retaining bar end portion, means for fixing said main body against movement on the bar,

a clip on said main body to engage over the adjacent overlapping bar, said main body including a wedge bearing portion extending along an edge of the bar on which said main body is mounted, a wedge slidably disposed against said bearing portion, means/for retaining said wedge in assembled relation to said main body but free for wedging movement, and means on an adjacent overlapping retaining bar against which said wedge may thrust.

2. In form clamping apparatus having re- I taining bars to girdle the form with their adjacent end portions in overlapped relation, wedge carriers each comprising a main body having a passage therethrough to receivea retaining bar end portion, means for fixing said main body against movement on the bar,

1 a clip on said main body to engage over the adjacent overlapping bar, said main body including a wedge bearing portion extending along an edge of the bar on which said main body is mounted, a wedge slidably disposed against said bearing portion,'me'ans for retaining said wedge in assembled relation to said main body but free for wedging movement, and means on an adjacent overlapping retaining bar against which said Wedge may thrust, and means for retaining a tightened wedge against relaxation.

3. In a form clamping apparatus, retaining bars to girdle the form with their adjacent end portions in overlapped relation,means for securing certain overlapping end portions of said. retaining bars together, wedge carriers engageable in mutually cooperative relation on remaining overlapping end por tions of saidretaining bars, each wedge car-- rier comprising a main body having a passage therethrough to receive a retaining bar end portion, means for fixing said. main body against movement on the bar, a clip on said main body to engage over the adj acent overlapping bar, said mainbody further including a wedge bearing. portion extending along an edge of the bar on which said main body 7 is mounted, a wedge slidably disposed against said bearing portion,- and meansfor retaining aeeo said wedge in assembled relation to said main body but free for Wedging movement, said wedge carriers on adjacent overlapping retaining bar end portions being cooperatively associated whereby the wedge of one thrusts against the main body of the other.

4. In a form clamping apparatus, retaining bars to girdle the form with their adjacent end portions in overlapped relation, means for securing certain overlapping end portions of said retaining bars together,

wedge carriers engageable in mutually'cooperative relation on remaining overlapping end portions of said retaining bars, each wedge carrier comprising a main body having a passage therethrough to receive a retaining bar end portion, means for fixing said main bodyagainstmovement on the bar, a clip on said main body to engage over the adjacent overlapping bar, said main body further including a wedge bearing portion extending along an edge of the bar on which said main body is mounted, a wedge slidablydisposed against said bearing portion, means for retaining said wedge in assembled relation to said main body but free for wedging movement, said wedge carriers on adjacent overlapping retaining bar end portions being cooperatively associated whereby the wedge of one thrusts against the main body of the other, and. means for retaining said wedges when tightened against relaxation.

5. In a form clamping apparatus, retaining bars to girdle the form with their adjacent end portions in overlapped relation, means for securing certain overlapping end portions of said retainingbars together, wedge carriers engageable in mutually cooperative relation on remaining overlapping, end portions of said retaining bars, each wedge carrier comprising a main body having a passage therethrough to receive a retaining bar end portion, a set screw threaded through one side of said main body engageable with the bar to lock said main body against movement thereon, a clip on said main body to engage over the adjacent overlapping'bar, sa-id'main body further including at its opposite side a wedge bearing portion extending along an edge of the bar on which said main body is mounted, a wedge slidably disposed against said bearing portion, and means for retaining said wedge in assembled relation to said main body but free for wedging movement, said wedge carriers on adjacent overlapping retaining bar end portions being cooperatlvely associated whereby the wedge of one thrusts against the main body of the other.

i 6. In a formclamping apparatus, retaining bars to girdle the form with their adjacent end portions in overlapped relation, means for securing certain overlapping end portions of said retainingbars together, wedge can riers engageable in mutually cooperative re: lation on remaining overlapping end portions of said retaining bars, each Wedge carrier comprising a mam body havmg a passage side of said main body engageable With the bar to lock said main body against movement thereon, a clip on said main body to engage over the adjacent overlapping bar, said main body further including at its opposite side a Wedge bearing portion extending along an edge of the bar on which said main body is mounted, a Wedge slidably disposed against said bearing portion, means for retaining said Wedge in assembled relation to said main body but free for Wedging movement, said Yvvedge carriers on adjacent overlapping retaining bar end portions being cooperative- 1y associated whereby the Wedge of one thrusts against the main body of the other, and means for retaining said Wedges When tightened against relaxation.

7. AWedge carrier for engagement on retaining bars of form clamping apparatus,

comprising a main body having a passage therethrough to receive a bar, means for fixing said main body against movement of the bar, a Wedge bearing portion connected wlth I "said main body to extend along an edge of the bar, a Wedge slidably disposed against said bearing portion, means for retaining said mainbody against movement on the bar,

and said main bodyfurther including an ofi' set clip to engage a bar overlapping .said first mentioned bar.

10. A Wedge carrier for engagement on retaining bars of form clamping apparatus, comprising a main body having a passage therethrough to receive a bar, a set screw threaded through one sideof said main body engageable with said bar to lock said main body against movement thereon, a Wedge bearing portion at the opposite side of said main body to extend along an edge of the bar, wedge supporting means laterally projecting beyond said bearing portion, a Wedge slidably mounted in said supporting means and slidably disposed against said bearing portion, said supporting means and Wedge having cooperative male and female means to retain said Wedge in assembled relation to said main body but free for vvedging movement, and said main body further including an oif-setclip to engage a bar overlapping said first mentioned bar.

In testimony, that I claim the invention set forth above I have hereunto set my hand this 29th day of June, 1929.

7 SAMUEL S. COLT,

said wedge in assembled relation to said main 1 body but free for Wedging movement, and said main body further including an off-set clip to engage a bar overlapping said first mentioned bar.

8. A Wedge carrier for engagement on retaining bars of form clamping apparatus, comprising a main body having apassage therethrough .to receive a bar, a wedge bearing portion at one side of said main body to extend along an edge of the bar, Wedge supporting means laterally projecting beyond said bearing portion, a Wedge slidably mounted in said supporting means and slidably disposed against said bearing portion, said supporting means and wedge having cooperative male and female means to retain said wedge in assembled relation to said main body but free for Wedging movement, and means for fixing said main body against movement on the bar.

9. A wedge carrier for engagement on retaining bars of form clamping apparatus,

comprisingamain body having a passage therethrough to receive a bar, a Wed ebearing portion at one side of said main ody to extend along an edge of the bar, wedgesupporting means laterally projecting beyond said bearing portion, a Wedge slidably mounted in said supporting means and slidabl disposed against said bearing portion, sai supporting means and edge having cooperative male and female means to retain said Wedge in assembled relation to said main body but free for vvedging movement, means for fixing

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