US2115137A - Wall tie - Google Patents

Description

G. B. Bosco April 26, 1938.

WALL TIE Filed NOV. 5, 1957 Patented Apr. 26, 1938 UNITED ASTATES PATENT OFFICE Y 2,115,137 Y Y, WALL'rrm f K `('Jleorge Bf Bosco, Chicago, Ill. I Applicationnovember 5,1937, sentirne. 172,869

4 claims." (cm2- 103) This invention relates to the general art of masonry and concrete structures, and more specifically to bonding and tying devices for such structures. In a well known form of such devices metal anchor channels, usually of dovetail form in cross-section, are embedded in the surface portion of a concrete column, and in thesey channels are inserted at intervals the correspondingly shaped heads of key strips, the body portions of which project from the side of the columnand have transverse corrugations or teeth that are embedded in the mortar of a masonry facing that is built up entirely or partly around the column to conceal the latter. These anchor channels are fastened to the inner surface of the wall of the wooden form of the concrete column, usually by nails driven through the transverse limb of the channel into the Wall of the form. As the concrete is poured into the form it is usually stirred by mechanicalV agitators to prevent voids in the concrete body, and this often has the effect of loosening the nails and causing cracks or gaps between the edges of the channel and the inner surface of the form. The lateral thrust of the wet concrete also causes the wall of the form to bulge outwardly more or less, unless it is very strongly supported against such bulging, and this bulging also creates cracks or gaps between the edges of theV channel and the inner surface of the form. 'I'hrough these cracks or gaps, whether resulting from either or both of the above named causes, the wet concrete works into the channel, more or less filling and clogging the latter, so that the mason has difficulty in entering and properly positioning the heads of the key strips, and frequently finds it necessary to dig the concrete out before he can properly enter and place the heads of the key strips; and this involves extra labor and loss of time.

One object of this invention is tol provide an improved means for attaching the anchor channels to the wall of the form by which the above mentioned cracks or gaps cannot occur from either of the above mentioned, or any other, causes, so that no time and labor are lost in cleaning mortar out of the anchor channel.

Again, the pressure of the wet mortar against 50 the sidewalls of the channel often bends the side walls inwardly on their joints with the transverse wall to such an extent that, because of the resultant narrowing of the channel, it is diflicult or impossible to properly position the heads of 55 the key strips therein. Another object of the invention is to provide an .improved attaching means for the anchor channel by which such lateral bending or displacement of the side walls of the channel cannot occur.

The anchor channels are made in sections Which are successively nailed to the form wall in endwise abutting relation; and considerable skill and care are required to attach the successive sections in accurate alinement with the meeting ends of the side and transverse walls of a previously applied section in perfect register with each other. A still further object ofy this invention is to provide a means for facilitating such alinement of meeting sections, such means in its preferred form consisting of a compressible elastic strip, such as a strip of felt, that can'be pressed into each section through its open side and when so entered expands laterally and lls a longitudinal portion of the section and projects beyond one end of the section. When one such loaded section has been nailed in place on the form, the next abutting section, similarly loaded, is applied, its empty portion being forced over the exposed projecting portion of the preceding strip, so that the latter spans the joint VVbetween themeeting ends of the two sections and thus serves as a sort of mandrel to center the two sections in alinement with each other. After the form yhas been taken down, Ythe felt strips are dug out and re-used or discarded. Y 13.6

Illustrative embodiments of the invention are shown in the accompanying drawing, in Which:-

Fig. -l is a fragmentary elevation viewed from the inner side of a form, showing two vertically alined anchor channels secured thereto by my improved'attaching means, and also showing a portion of the temporary felt alining strip.

Fig. 2 is a horizontal section, takenon the line 2--2 of Fig. l.

Fig. 3 is a horizontal section through a portion 'of the concrete column, showing the wall of the form removed, the anchor channel embedded therein, and the projecting portions of the nails Fig.` 8 is a perspective view of the key strip appearing in Figs. 4 and 5. Y

' face of which is applied a vertically disposed anrchor channel II of the dovetail form in crosssection clearly indicated in Figs. 2 ancdf.Y The anchor channel I I i is1 cbmmonly "madeY in'` predetermined lengths that are applied in endwfise abutting relation to the height or length required by any particular job, the line I2 in Fig'. 1

' dicating the joint between the meeting ends-'0f no; novelty is. .claimed therefor.

" shownin Fig. 1, thev nailsA I4 on two adjacent sections.

Y The side limbs of the channel' have-lon* their' free longitudinal edges, outwardly directedrflanges Si the anchor channel is. secured tothe wall I0 by4 nailsV I4. rThese nails Yare preferably applied as shown in Fig. 2, being locatedon the-outer sides of vboth side walls of lthe, channel and prefierably in `Contact:with said walls, and driven through the flanges I3 into, the form wall ID obliquely tothe plane ofv the' latter. ,The'fnails are formed withheads I 5 that overlap thev transe verse limb Aof thechannel, 4and 'preferably vthe heads are-each vformed with a' tooth l I6 that. as

the nail is driven home, bites into thetransverse ,limb and thus locks Ythe nailagainst spreading outwardly of thechanneh. y Y. ,A 1

This attaching means is very `effective; to prevent the presence of any crack origap between the flanges I3 and thefvfo'rm-wall I0 yduefeither"` to thevconcrete .puddling operationor r.to swelling and consequent bendingof; the form wall,V `and the described manner of applying the nails leaves Ytheinterior of the channel free and unobstructed f for theready application lof the key pieces.

l. To facilitate the accurate VValining of thesectionsof the anchor channel, I preferably employ filler v`strips I1. of felt` or similar compressible elasticV material that can be inserted through lthe open side of vthe channel and will lthen ekpand andvirtuallyfill the Ylatter.-Eah section of the filler strip I'I ,is entered yinto, its channel' section before the latter is nailed to the Wall,

and a portion of it projects beyond the end of .the 'Vchannelsection as indicated in Fig.y 1, so

that the empty portion o f the next adjacent channelY section may be .forced over the projecting portioniof the-strip, as shown in Fig. 1, thelatter thusiserving as a *temporaryl mandrel to aline the two sections at their meeting ends..

Incidentally, 'thellller strip; I'I ,further serveschannelY is horizontal, as shown inFigs. 6,',7 ,and

Before the concrete is poured intotheform,

9, a key strip such as I9 is employed. kThe key strip I9 differs from the key strip I8 only in having-its shank warped through an angle of Y90` degrees to form a vertical head I9 for engagement with the horizontal channel II. The other end of each key stripV is split and the portions on eachside of the splitl are turned in opposite directions to form teethV 2D that, as sho-wn in Figs. 5 and 7, are emedded in cement 2i between and connecting adjacent tiles 22 of a hollow ktile facingy that is applied to V`the 'concreteV column or Vwall; the key strips usually spacing the facing approximately one-'inch from the column or wall. kThe structural forms of thekey strips 18g-fand I9jherein shown are old and known, and

the two sides ofthe channelare preferably located in `alternating orrstaggered relation. f 7

Although but one specific embodiment of this invention has beenfherein shown and described, it willl be. understood that details of the construction shownma'y be altered or omitted without departing froml the spirit of the invention as defined bythe-.following claims. Y Y :Iclaim:

, Y 1. In a wall tie of theclass described, the com-f lbination with an anchor channel of -dovetail form in vcross-section, of `means for attaching said channel to a form Awall consisting of'nails Ydriven intol said wall robliquelycto the plane ofthe latter'and lying crcsswise of and substantially parf allel with both side walls of the channel and having heads overlapping and contacting Awiththe transverse llimbV of the channel.

2;'y In a wall .tieof the class described, the comfbinationwitlraln" anchor channel, of means for 'attaching'said' channel to a vform wall consisting ofv nails driven intofsaid `wall iobliquely tothe plane fof the latter, said nails lying Yon the outer sides of both side walls of the channel'fand having heads overlapping thegtransverse limb of the lclann'el,v an'd'jsaid headseach having a toothY y adapted to bite into said'transverse limb.

3. In a wall tie of lthe class described, the combination with an anchor ..channel having out-Q1 wardlydirected angesfongthe free longitudinal j edges orfhitsjsidewalls,of means for-attaching saidchannel t6 'a form"wall consisting of nails driven through'` j saidflangesfand V'into-1 said wall ('JbliqllelytoY the plane of. the latter, said nails lying ,onfthe outerfsides of bothV side walls of the channel and havingjheads overlapping and contacting withthe transverse limb of the channel. e ffl' ,21. In a wallftieloffthe class described, the combination` with endwise abuttingy anchor channel sectionsof means foralining the meeting endsV of said sections when attaching them to a form .wall consisting' of Va transversely compressible strip ofY resilient material filling and projecting sides Vof'said sections. l Y B. BOSCO'.

Y65 sertibleand removable laterallythrough the ,open Y f beyond the meeting end` portion of one of said

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