US2823441A

US2823441A - Dummy she-bolt

Info

Publication number: US2823441A
Application number: US233851A
Authority: US
Inventors: Chester I Williams
Original assignee: Individual
Current assignee: Individual
Priority date: 1951-06-27
Filing date: 1951-06-27
Publication date: 1958-02-18
Anticipated expiration: 1975-02-18

Description

Feb 1S, 1958 c. l. WILLIAMS DUMMY SHE-BOLT Filed June 27. 1951 xthegform.

United (States gPatenti' "ice 2,823,441 DUMMY SHE-BLT cheiferfr. Williamson@ Rapids, Mich. Application June 27, 19s`1,isena1o.`2sss1 Ys claims. (Cl. 2s-:131)

This invention relates to.` concrete forms, and more particularly it relates to 'a she-bolt construction which permits the erection of concrete forms in a minimum time.

YPrior to my invention, concrete Aforms were erected in the usual manner by using what is known as ordinary she-bolts fastened to -tie-rods, and othe'r, `-forms of anchoring devices, and the concrete, afterit lhad beeny set, 'anchored'the tie rods in place. Howeverfaigreatjdeal of effort Wa's necessary kto remove the she-bolts'fro'm the tie rods when the Vconcrete'rorm was detached and raised to the next pouring level. Itis therefore a principal object Yof 'my invention to provide an improved form of Ydummy she-bolt -in combination with any anchoring *means which 'will permit the'rea'dy removal of the she-bolt in the Vraising of the forms, after` which an ordinary she-bolt may 'be attached tothe ranchoring means, and the form leveled, ready "for the next pouring.

It is also another object of the invention to provide an improved form -of dummyshe-bolt which need not be -placed in the-form until just ahead Vof the pouringo that suiiicient headroom is always available alongside the form While readying the form and the surface of the concrete for the nextvpouring.l w u h Another objectof the invention is to. provide'ajsmple lform of dummy she-bolt whichmay be readily attached to the strong back or waler Ysupports in-a minimum lof time, permitting the anchoring rodslto YberattachedA after the dummy she-bolts have been-.positioned onthe vform.

Another object or the invention is to providefa dummy she-bolt having suilicient taper that it may be readily removed from the set concrete, and to-.permit replace- :ment thereof by a standard she-bolt forclamping the -rornr in position 'after it has vbeen raised. M

yStill 'another'object of the invention-is to `providefan improved supportbracket for the dummy she-bo'ltwhich is readily attached to the strong back or waler supports for -the form,Y and permits ease in mounting ofA the -dummy she-bolt yupon the bracket after it isgplaced in Still another object of the invention is toprovide an improved dummy lsheltiolt and anchor therefor vwhich mayibemounted from the exterior of the fform, simplify- :ing theeerection ofthe form as the various lif'tsiare ipoured.

In orderl'to accomplish the above Hhjee't's of iinii'ventitm, Ijhave fp'rov'ided a dummyfshe-'boltwhichlis :adapted to -be detach'ably'cn'nected t'ofa fp'igtail l`a'rilitfirhe- 'bolt waiter "it lbeen 'removed fro'm't'he setV concrete,

pouring "another lift. A"sui`t'able supporting bracket y'has LA 2,823,441 I throated Feb. rs, 195sv applying 'a wrench =to the dummy -she-bolt to detach the she-bolt =from vthe complementally formed end on the vanchoring means -to which the dummy'she-bolt is at-1 tached. Y

Many other objects and advantages of the construe-- :tion herein shown and described will be obvious to those skilled -in the iart from the -disclosure herein given.

r'flfo this l'end my l'invention consists in the novel Vcon- Ylfst'ctorr, Yarrangement, 'fand Vcombination of'parts'herein means.

f'fo'r the fst pouring.

'showirand-described'and more :particularly pointed out -'in 'the vclaims'. In Ethe edrawings,

'represent like or corresponding A'parts wherein like lreference characters Fig. '1 is a vertical, ysectional view -illustrating v"the erection Jof l1a -concrete form using 4the dummy she-bolt construction of this invention;

*Fi-g'. 2."is ea view, .partially in cross-section taken "substantially along line 2;2-of Fig. -1, illustrating the con- "struction iof fthe dummy :she-bolt;

Fig'. 3 is'a'ffr'o'irt view offthe Vdummy she-bolt and its v'supporting -bra'cket mounted upon spaced vertical Waler members of ="a `concrete form;

Fig. 4 illustratesa ymodified form of she-bolt structure Fi'g. S illustrates another embodiment 'of an anchoring Referring ynow to the drawings, a dummy 'she-bolt constructionlO `isshown mounted in a simple concrete -for'm Aconstruc'tio'n VV11 comprising strong backs 12`a'nd sheathing -13. 4For anordinary Yconcrete form construeftion where large ilifts of concrete are b'eing cast', the vk'relative sizeof the'strong backis'substantially 1-2 inches by '12 inches, and the 'sheathing i's'fmadeup of nembers substantially 4 inches in'thi'ckness. The re'ative v`length of these forms'as they are erected ymay range Iup -vto twenty-tive feet inlength, and "the `spacing between lthestrong backs vris usually'six feet. T heinve'ntion -ha's be'err particularly illustrated in connection "fwith "Fig. y1 'to show the method ofapplyi'ng the forms when pouring se'veral lifts `or'layerfs,one"upon the other, wherefit iis necessary ft raise the form. The forms `inay"us1ially beset =`in *the 'ordinaryrnaniler Vstarting fr'om bedrock, and pi'g- 'tails' or tie rods Fmay be anchored in place inthe rock lin the 'rdiiary manner, 'to Vwhich the forms lare mounted and the fn'eces'sary bracing applied for'erecting the form l I'n 1, 'for`i`exa`mple, there is illstrated the 'use of the A:invention in which the'concrete form T1 is Sapplied lfor th'e'pnr'pose of illustration fafteijthe first .pour 14 "has been vvmade and set, whereupon the 'concrete form -11 is Trai'sed t'o'tle position shown vin the solid lines.

-Fi`g. 1, 'U'was *seti'n the vform ls'o that its tapered end YI5 isi extended through the form yto 'the position `shown, land Thisftaperedopeiingfformed 'by the tapered end of the Ydinnnry `vshe-limitjper'r'nits the insertion rof the tapered 'end'bran fordinary-slfi`eiblt construction 21a-s the relative taper *vor the dn'rrirny she-bolt is greter than g'finto "the tapered opening #19 -ieft by :the lit:-

Tapers 15 which have been found satisfactory for the the anchoring ends 16.

the necessary adjustment.

vfrom 1% inches to 11/16 inches in diameter.A For 1% iinch diameter dummy she-bolts, a suitable taper has been 'lfound to be from 1% inches in diameter to 11/8 inch di- :ameter in 6% inches. The taper of the regular 1% inch -diameter she-bolt would also be reduced 1n the same relaztive proportions as the regular 1% inch she-bolt.

For the purpose of simply illustrating the invention, a :simple pigtail 16 has been shown. It is within the scope #of the invention that other suitable lengths and shapes :may be used without departing from the scope of the in- `\vention. For example, a pigtail construction 16', illusltrated in dotted lines in Fig. 1, found to be suitable may Lextend horizontally from the threaded end a predeterimined distance X, after which it may be inclined at an langle of 10 for any predetermined length Y. The pigtails may be varied in length at the threaded end and at the opposite end to suit various conditions encountered and to develop the maximum holding strength of the shebolt depending upon the forces developed in the erection of the form and the pouring of the concrete.

The concrete form 11 is then raised by suitable hoisting means to the position shown in solid lines, and While suspended in position, the regular she-bolts 21 are placed through the concrete form in the same holes provided through the strong backs for the insertion ot the dummy she-bolts. The regular she-bolt 21 is affixed to the threaded end of the pigtail anchor 16 by attaching the wrench to a squared end 22 of the she-bolt, and firmly threading the she-bolt in position on the threaded end of It is customary that the end of the pigtail shall be threaded into the she-bolt so that the end of the pigtail is approximately 3 inches in from the -rear face of the sheathing to develop the maximum strength of the connection of the pigtail with the shebolt. The bracket 23 and adjusting nut 24 therefor,.is then threaded upon the she-bolt clamping the form against the face of the cast block, after which the double-headed nails 25 may be suitably mounted in holes provided in the bracket 23 to fix the bracket in position upon the strong back of the form.

An adjusting or alignment jack 26 is also mounted on the end of the strong back having a threaded bracket 27 abutting the rear face of the strong back, whereas a base 28 of the jack abuts the front face of the cast concrete block. This same construction of the regular shebolt and adjusting jack is provided at frequent intervals across the width of the form, and provides the thrust support for the form when erected in place and concrete poured against the form. The forms are leveled by adjusting the jack 26 through a squared end 29 by rotating the shaft of the jack in the required direction to make When the, form is correctly leveled, the adjusting nut 24 is firmly secured to take the thrust of the concrete when poured against the form.

With the usual she-bolt construction and anchoring means, the pigtail thereof will develop approximately a 35,000 pound pull in each anchor under test, whereas the actual load usually is approximately 17,000 pounds so that there is a sutlcient factor of safety.

In a form construction erected in the manner described, it is possible to work along the sides of the form preparing the surface of the concrete for the next pour with a great deal of freedom, since by using this type of form construction, it is not necessary to place the anchoring means for the next pour until just ahead of the pouring operation. This has been made possible by the dummy she-bolt construction of this invention. The vertical yspacing for the location of the she-bolt has beenY determined when the forms have been fabricated so that all that is necessary is for the dummy she-bolts 10 to be set in the form, as illustrated in Fig. l.' In some instances,

there is usually provided a scaffolding built on the form (not shown) for erecting the she-bolts in position. The she-bolts 10 may have the pigtail anchor 16 attached thereto for erecting, and the she-bolt 10 and the pigtail anchor inserted through a hole 30 in the form.

A- support bracket 31 for mounting the dummy shebolt 10 is mounted contiguous to the opening 30 through the form, and nailed in position by double-headed nails 25, as shown in Figs. 1, 2, and 3. The bracket 31 has an arcuate struck-out portion 32 from the bracket which provides an opening for the dummy she-bolt 10 as the bracket 31 abuts the face of the strong back 12 or vertical walers. The arcuate struck-out portion 32 is also provided with an opening 33 for the passage therethrough of the dummy she-bolt 10. The dummy she-bolt is held in position with respect to the bracket 31 by a pin 34 inserted through a complementally formed hole 35 in the dummy she-bolt. The pin 34 is pointed at one end for ease in insertion through the hole in the she-bolt, and provided with a hooked portion at the opposite end for ease and removal of the pin from the she-bolt. The shebolt is provided at its outer end with a squared end 36 for vrotating the she-bolt for detachably connecting the shebolt to the pigtail anchoring means 16 by the complementally formed threaded

portion

17 and 18 of the anv choring means and the she-bolt.

Usually the bracket 31 is assembled to the she-bolt 10, and the pin 34 mounted to latch the bracket to the she-bolt so that in the erection on the form, the assembled pin, bracket, and she-bolt may be readily mounted on the form by the insertion of the dummy she-bolt within the holes provided in the form, after which the bracket 31 is nailed in position, using the double-headed nails 25 permitting ease of removal later. If the assembled she-bolt 'and anchoring means are inserted and erected in place on the outside of the form, they may be suitably aixed together, but if it is desirable, because of working conl the dummy she-bolts may be threaded to the tie rods from the outside, after which the pin is applied, securing the l dummy she-bolt in relative position with respect to the form.

The form may then be poured to a predetermined level 37 and, as pointed out above, the particular form of dummy -she-bolt permits the erection of the dummy she-bolts just ahead of the pouring. With this improved form of dummy she-bolt construction, it is therefore possible to pour a greater amount of concrete than has heretofore been possible, since the construction permits ease in erection of the form, and aligning thereof.

After the poured layer of concrete has been set for the required period, the dummy she-bolts are then re- Hmoved by first detaching the pin 34 and unscrewing the Vdummy she-bolt from the threaded end of the anchoring means 16. The brackets 31y are then detached, and the she-bolt and bracket and pin Vare re-assembled together to prevent displacement of the parts so that they may be readily assembled when the next layer 38 is poured i after the forms have been raised and realigned. This is' shown in the dotted position 11' of the forms, and l0 of the she-bolt of Fig. 1.' Removal of the dummy Vshe-bolt with its enlarged tapered end 15 provides the enlarged tapered opening 19 as described above so that the threaded end 17 of the anchoring means left by the removal of the dummy she-bolt,r The ordinary she-bolt `the `-for-ms leveled.

Although it is preferred `to use a pin 34, constructed as shown, it is also within the scope of the invention to use a hairpin type of pin (not shown) either 'end of which may enter the hole 35. While the other end is adapted to engage the groove 35', suitably spaced holes 35 and grooves` 35 may 'be formed on the dummy shebolt as shown in Fig. 2 to provide for ylongitudinal adjustment of the she-bolts if necessary to accommodate changes in thickness of sheathing and variations in dimensions of strong-backs, etc.

The anchoring means with which it is preferred to use the dummy she-bolt and ordinary she-bolt construction is what is known as a pigtail anchor having a series of undulating deformations 39 which serve to anchor the anchoring means within the cast concrete, and which develops sufficient strength when cast therein so as to support the form in position. It is preferred that the deformations 39 shall be laterally olset slightly greater than the diameter ofthe rod which usually is inch in diameter, and not more than twice the thickness or diameter of the rod. It has been found that this relationship permits the maximum development of tension in the rod when cast into the concrete preventing removal, and also permits ease of erecting the anchor into rock foundations where it is necessary to drill a hole for the anchoring rod, and cementing it in place to provide an anchor for erecting the form in place upon bed-rock. The 'pigtail anchors may be straight, as illustrated, or other suitable shapes as illustrated at 16' and described above. Y

Referring to Fig. 4, there is illustrated a modied form of clamping device such as a dummy or ordinary she-bolt construction in which the tapered end 15 is provided with a lag screw thread 18' to engage a complementally formed thread 17 on a helically formed anchoring means 16a. The anchoring means is formed with a plurality of helical coils 40 suicient in number to retain the form in position when an ordinary she-bolt construction having a similar lag screw thread is threaded into the anchoring means 16a. The spacing of the helical coils andv diameter thereof is such that the poured concrete when puddled thoroughly surrounds the anchor- -ing means.

Fig. 5 illustrates an anchoring means 16b similarly constructed with helical coils 40, asV the embodiment of Fig. 4. The anchoring means 16b is however provided with a threaded end 17 asY the anchoring means 16 of Fig. 1 and Fig. 2, so that it may be readily attached and detached to the dummy she-bolt construction 10 and ordinary she-bolt construction 21. Although there has been illustrated in connection with Figs. 1, 2, 4 and 5, particular embodiments of anchoring means and clamping devices such as dummy she-bolt and ordinary shebolt constructions, it is to be understood that it is within the scope of the invention that other similar forms of the construction may be used. In the claims, it is to be understood that clamping device and dummy she-bolt and ordinary she-bolt are synonymous.

Although there has been described a particular size of form which may be used for pouring lifts of approximately tive feet, the forms may be of any desired length and height, and the forms are adapted to be dismantled and used repeatedly for pouring the concrete either for the construction of vertical or battered Walls. The various members forming the concrete form are secured together by conventional fastening devices, and the bracing for the form may be suitably spaced to provide the requisite form rigidity. The form so constructed may be used with the preferred form of dummy she-bolt of this invention along with ordinary she-bolts, and may be raised and relocated, as is well understood in the art.

"The 'construction of the dummy she-bolts and `the'ordinary she-bolts Apermit ready dismantling thereof, and

'reuse or storing :as desired.

`dummy she-bolts of this invention and anchoring means work equally well on vertical or battered walls, or for erection of the forms directly to a rock foundation. Furthermore, the dummy she-bolts and ordinary shebolts, 'together with the levelling means, provide asimple means for erecting a concrete form in which the load on the form is carried through the levelling jack, and the ordinary she-bolt isy anchored to the anchoring means, the original location of the anchoring means having been provided by the dummy she-bolt construction permitting ease of removal of the dummy she-bolt, and ease of mounting an ordinary she-bolt in place of the dummy she-bolt to the anchoring means.

Having thus described my invention, it is obvious that various immaterial modifications may be made in the same without departing from the spirit of my invention; hence, I do not wish to be understood as limiting myself to the exact form, construction, arrangement, and combination of parts herein shown and described, or uses mentioned.

What I claim as new and desire to secure by Letters Patent is:

1. The combination with a concrete form, of a dummy she-bolt adapted to extend through a hole in the concrete form and an ordinary she-bolt adapted for replacing the dummy she-bolt, said dummy she-bolt having a tapered end, undulating elongated rod-like anchoring means adapted to be detachably connected to the dummy she-bolt, complementally formed means `on the dummy she-bolt and the anchoring means for detachably connecting them together, and said tapered ends of the dummy she-bolt and the ordinary she-bolt ditering whereby removal of the dummy she-bolt. from the cast concrete forms a larger. tapered opening in the concrete for de@ tachably mounting the smaller tapered end of the ordi'-A nary she-bolt upon the anchoring means when the forniA is raised and the ordinary she-bolt afxed to the afore-l said undulating elongatedr rod-like anchoring means precast in the cast concrete.-

tapered end, a pigtail anchor adapted to be detachably connected to the dummy she-bolt, complementally formed? means on the dummy she-bolt and the pigtail anchor forV detachably connecting them together, and said tapered ends of the dummy she-bolt and the ordinary she-bolt;

differing whereby removal of the dummy she-bolt from.

the cast concrete forms a larger tapered opening in theconcrete for detachably mounting the smaller tapered.` end of the ordinary she-bolt upon the pigtail anchor wherrV the form is raised and the ordinary she-bolt axed to thev aforesaid pigtail anchor pre-cast in the cast concrete.

3. The combination with a concrete form, of a dummyl she-bolt adapted to extend through a hole in the concrete lform and an ordinary she-bolt adapted for later replacing the dummy she-bolt, said dumy she-bolt having a tapered end, a pigtail anchor adapted to be detachably connected to the dummy she-bolt, said pigtail anchor comprising a threaded end and longitudinally extending anchoring deformations formed thereon, complementally formed threaded means on the dummy she-bolt and the pigtail anchor for detachably connecting them together, and said tapered ends of the dummy she-bolt and the ordinary shebolt differing whereby removal of the dummy she-bolt from the cast concrete forms a larger tapered opening in `the concrete for detachably mounting the smaller tapered end of the ordinary she-bolt upon the pigtail anchor when the form is raised and the ordinary she-bolt afxed to the aforesaid pigtail anchor pre-cast in the cast concrete.

4. The combination with a detachable anchoring means for a concrete form adapted to be detachably connected to eitherV a dummy she-bolt or an ordinary she-bolt, each of said she-bolts having a tapered end, of a dummy shebolt adapted to extend through the concrete form, said dummy she-bolt including an enlarged tapered end, larger than the tapered end of the ordinary she-bolt, to which the anchoring means is adapted to be detachably connected, said enlarged tapered' end adapted to form an enlarged opening in the concrete cast against the form, whereby the tapered end of an ordinary she-bolt is adapted to be inserted freely for detachably connecting to the anchoring means, supporting means for the dummy shebolt adapted for detachably mounting the she-bolt therein, means for detachably mounting the supporting means on the concrete form, said supporting means including an arcuate portion formed on the supporting means forming a vertical opening, said arcuate portion adapted to lreceive the dummy she-bolt, whereby the dummy shebolt is adapted to extend through the supporting means, securing means complementally formed to means formed Yon the dummy she-bolt, and said securing means adapted to extend through the vertical opening in the supporting means provided by the arcuate portion, whereby the supporting means and dummy she-bolt are detachably connected together. Y

5. The combination with a dummy she-bolt for erecting concrete forms, said dummy she-bolt adapted tol extend beyond the inner face of the concrete form fordetachably mounting anchoring means thereon, supporting means for the outer end of the dummy she-bolt comprising a struck-out portion from the face of the supporting means adapted for detachably mounting the she-bolt therein, and quick detachable means adapted to be inserted through the she-bolt between the struck-out portion and the face of the supporting means for attaching and detaching the dummy she-bolt to the supporting means for locating the inner end of the dummy she-bolt with respect to the inner face of the concrete form, whereby an ordinary she-bolt may replace the dummy she-bolt as the concrete forms are relocated.

6. As an article of manufacture, a support bracket for detachably mounting a dummy she-bolt on a concrete form, said supporting means including an arcuatel struckout portion formed on the supporting bracket forming an opening in the bracket between the inner face of the struckout portion and the outer face of the support bracket, said arcuate portion provided with an opening adapted to receive said dummy she-bolt whereby the dummy she-bolt is adapted to extend through the supporting means, said opening provided by the struck-out portion adapted to receive securing means for detachably connecting the support bracket and the dummy she-bolt together, and said supporting bracket adapted to be detachably afxed to the concrete form.

7. The combination with anchoring means for erecting concrete forms, having longitudinally spaced undulating deformations adapted 'to be cast integrally in concrete, of either a dummy she-bolt or an ordinary she-bolt adapted to be detachably connected to an end thereof, each of said .she-bolts having a tapered end and said dummy she-bolt having an enlarged tapered end having the diameter of the free end larger than the diameter of the free end of the tapered end of the ordinary she-bolt and adapted to be detachably aixed to the anchoring means whereby upon removal of the dummy she-bolt, the enlarged tapered end forms a tapered opening about the end ofthe anchoring means, whereby the smaller tapered end of an ordinary she-bolt is readily attached to the end of the integrally cast anchoring means for erecting and securing concrete forms to the cast concrete.

8. The .combination with a detachable anchoring means for a concrete form, ofv a clamping device adapted to extend through the concrete form, said clamping device includingk an enlarged tapered end to which the anchoring means is adapted to be detachably connected, and said free ends. of said anchoring means and clamping device adaptedtto be connected complementally formed, said enlarged tapered end adapted to form an enlarged opening in the concrete cast against the form, whereby the tapered end of a smaller similarly formed clamping device is adapted to be inserted freely for detachably connecting to the anchoring means, and said anchoring means comprising a large diameter helix extending rearwardly along the length of the anchoring means for retaining the anchoring means when embedded within the concrete cast within the form.

References Cited in the le of this patent UNITED STATES PATENTS 1,042,648 Crary Oct. 29, 1912 2,074,460 Colt Mar. 23, 1937 2,100,614 SchenkV NOV. 30, 1937 2,164,592 Pilj July 4, 1939 2,190,748 Williams Feb. 20, 1940 2,534,154 Williams Dec, 12, 1950