US1924631A - Form tie - Google Patents

Description

Au 29, 1933. H. H. TOOGOOD Filed Oct. 20, 1932 2 Sheets-Sheet l Aug. 29, 1933.

H. H. TOOGOOD FORM TIE Filed Oct. 20, 1932 2 Sheets-Sheet 2 Patented Aug. 29, .1933

1,924,631 FORM TIE Henry a H. Toogood,

Los Angeles', 1cm.

Application October 20, 1932. SeriaLNo.v 638,808

9 Claims. (01. 25 '131)1 This invention relates to concrete forms and more particularly to a wire form tie and form spreader or spacer;

An object of this'invention is to provide a preformed tie and spreader or spacer for the form boards or walls so that during the mounting of the walls or sides of. the form, certain portions of the sides will not be out of alinement with the other portions, thereby effecting the thickness of the concrete wall or floor construction. a

1 Another object of this invention is'to provide in a form tie means whereby after the concrete wall has been constructed and the form boards removed therefrom, moisture will not seep through the concrete construction along the surface of the tie or spreader under capillary attraction. i w

A further object of this invention is to provide 29 a twisted wire tie and spreader which is so constructed that the'strands of wire are subjected,

under the twisting thereof, to substantially the maximum stretching capacity of the wire so that when the tie is in operative position, it will not stretch additionally under the strain ofthe concrete. i

A still further object of this invention is to provide a twisted wire strand which is constructed initially out of a single strand of wire so looped or bentupon itself as to provide a plurality of wire strands having a co'nfigurathmat a point intermediate the length of the tie to prevent the passage of moisture undercapillary attraction through the. concrete construction when the concrete has set. The above and various other'objects' and advantages of this invention will in part be described and in part be understood from the following detailed description 'ofthe present pr'e ferred embodiment, the same being illustrated in the accompanying drawings wherein:

Figure 1 is a detail top plan view partly broken away of a form tie beforethe wire strands are twisted upon each other. j -Figure 2 is a top plan view of the completed form tie.

Figure 3 is a detail side elevation of the form he shown in Figure 2. i 1 Figure 4: is a fragmentary top plan view of another form of tie construction. Figure 5 isra top plan viewof a further of tie construction. V

Figure 6 is a top plan view or another form of tie construction. i I

form

- Referring to the drawings'wherein like numer tiezro'd hereinafter describedbefore the strands 13,"18,"22 and 24. are twisted 'upon each other als of reference designate corresponding parts throughout the several views, the numerals I0 and 11 designate theform boards or side walls of a form, which areadapted to receive'a concrete construction such as a wall, floor'or other concrete construction. In order to space the form boards orwalls 10and 11 apart the desired dis tance and to prevent spreading of these. boards relative to each other, I have provided a form tie which is constructed out of a single piece of strand Wire, which form ,tie is generally desig-g nated as 12. a, a .v v

The wire strand from which the tie 12 is constructed is first bent inthe configuration'sh'own in Figure 1 with the free ends thereof parallel with each other and terminating at a point adjacent one end of the looped strand; Asshown in Figure 1, one portion 13 of the wire is provided with an angularly related stop member 14" which is adapted to abut against'the inner surface of the form board -10, and the oppositeend I of'this-portion 1-3 is provided with an extension 15,'which terminates in a U-shaped portion 16, and the connection between the u-sh'apedpor tion 16 and the extension '15 forms a loop, 17, the purpose-for which will be hereinafter described. f

The opposite end portion 18 of the wire strand is. also provided with-a stop membe'r 19"extending a direction o'ppositelyfrom the stop 14 and engaging against the inner surface of the form board. 10. This end portion 18has a loop 20 atone endthereof whichlis initially adapted tosubstantially abut against the bight of the U-shaped member 16 and be disposed in substan-' tially the same plane as the extension- 16.

A loop 21 is connected to the loop, 20 by means of a connecting bar '22, and this loop 21 is adapted to be disposed oppositely from the loop 20, and is'adaptedto receive a"tieb ar 23, which abuts against the outer surface of the form board 10. An extension 24 is formed with the loop 21 and extends across the space between'the form boards'lO and ll 'and is conne'cted to'the U- shapedtie rod: engaging member 16 by' means of an extension 25 which also terminates in a loop 26 normally spaced apart from thev 100p'1'1;

A form tie bar 27 is adapted to be engaged in the bight of the U-shaped-member 16' andto abut against the outersurfacefof the form board The construction shown in Figure 1 is'diagrammatic and shows the initial formation of the and the concrete may closely engage about the periphery of the wire strands so as to prevent the passage or "movement of water or moisture along the periphery of the wire strands under capillary attraction. I

Where a form tie is provided which is con-' 'structed principally of wire strands twisted upon eachother, the form tie acts as a guide member to permit the passage of water through the concrete under capillary attraction so that the inside surface of the concrete wall or concrete construction will be dampened when the outside surface of the concrete construction is also dampened. In this manner, Where the inside surface of the wall or the like forms a wall or interior' of a building or the like, the material on the wall willbe moistened and damaged by this mois- V .ture'seeping along the twisted strands of wire.

However, where a block or moisture stop is pro vided by means of the loop 28,. the concrete with- ,inthis loop and disposed about the parallel strands of wire will prevent the passage of water alongthe wire and thereby maintainthe inner surface of the wall in adry condition at all-times.

The loop'20 is adapted to be bent at substantially'a right angle tothe' longitudinal axis of the form tie, as shownfiin, Figures 2 and 3', so that this vloop 20 "constitutesa spacing member cooperating with the spacingmembers or stops 14 and .19 inholdlng the form boards 10 and 11 the desired distance apart."

-As shown in Figures 1, 2 and 3, the loop 21 is adapted to receive a form ti e bar 23 and, the loop 16; adapted to receive a secondform tie bar 27. The two, loops 17 and '26 may beturned so as ;to twistthe extensions 15 and 25 and the parallel legs of the U-shaped member 16 so as-to tighten the tie bar 27 within the'bight of the loop member 16.-'In this manner, when the workman is mounting the tie member hereindis:

closed ,in the concrete form, the stop members 14, 19 and 20 will not only hold the form boards 10 and 11 apart the desired distancebut also the U-shapedorloop'member 16..will prevent movement of the bar '27 in the event the forks formed by the-extensions 15 andj25 and the parallel legs of the member 16 are twisted unduly. J In Figure 5, there is disclosed another type of form tie which is constructed initially of a-single strand of wire looped upon-itself toprovide three strands which are initially disposed in parallelrelation one. to another after, the same manner as the strands shown in Figure -1, and the ends:

of theiwire are twisted upon each others'o as to provide a twisted strand-or tie portion 29. At

each end of this tie member 29, an angularly related spreader 30 is provided, each of which is'adapted toengage against the inner surface of the form boards 10' and 11 V One strand-31 of the rtriple strand, tie. con-v struction shown in Figure 5 is disposed in spaced parallel relationto the twisted tie'portion 29-and at each .endof thestrand member 31 and'the member 29, there isprovided a fork 32 which ter- Inmates in a .U.-. shaped; saddle or bar suppor ing member 33. This saddle 33 is adapted to receive a'tie bar 34, and this bar 34 is adapted to engage against the outer surface of the form members 16 and. 11'.

Through the construction of a form tie, as

shown in Figure 5, the concrete is adaptedto closely engage about the twisted strands of wire, and due to the close twisting of the wire and to the fact that thereare only two strands twisted one upon the other, the concrete will act as a moisture block, not only forthe passage 1" of moisture along the twisted tie portion 29', but also along the surfaceof the tie member 31 which ,is straight. I

block in the form of-a closed loop 35,-which is of a construction similar to themoisture block 28.

strand .termi- 'In' Figure 6, one of the wire. strands terminates whichhas a substantially U-shaped saddle 41 formed therewith within'the bight ofwhich a bar 42 is adapted to seat and engage against'the' outer surface of the wall member 11 As shown in Figure. 4, the form tie -12fis provided with aux-inner loop 20 which is left, or

disposedyin alinement with the forked portion comprising the strand members 15, the saddle member 16' and the strand member orextension In the use of the form tie constructions herein disclosed, where the formtie shown in Figures 2- and 3 is used, the loop 21 may be engaged with the rod 23 and the. opposite end of, the form tie passed between abutting form boards 11 and projecting outwardly beyond the outer surface thereof so that the forked portion of the tie together with the saddle 1'6 willbe positioned beyond the outer surfaceof the form board 11.: The stop memb'er20 will limit the inward movement of the form board 11 so that, each of these boards 10 and 11 willbe spaced apartby means of the.

stop members 14, 19 and 20. The bar 27 is then positioned in the saddle 16 and the freeends of the fork '17 and 26then twisted so as to tighten the bar 2'7 within the saddle and against the outer surface of the form member 11.- Due to the fact that during the twisting of the forked construction, there are four strands of wire which are twisted upon each otheryit is not easy to break'the wire strands.

When the strands have been so twisted as to tightly engage the. bar 27 in the saddle 16, the

bar .27 will not only be held tightly within the saddle but also the form board 11 will be tightly pressed against the stop member 20 and in thesame manner, the form board 10 will be pressed,

against the bar 16 and also against thestop members 14 and 19. -When the concrete is poured into thespace between the form memberslOand 11, a' portion of this concrete will -be disposed within the loop 28 and thisconcrete will act as a block'to prevent-passage of moisture along the surface ofthe tiemember 12. The tie members twisted structure, an openloop formed at the] other end ofthe twisted structure, means formed intermediate the ends'of the twisted portion to shown in Figures 5 and 6 may also. be engaged with the desired form boards and these members tightened by means of the -forked end portions 32 and 40, respectively. The ties shown in Figures 5 and 6 can be used where; a relatively'light con-- crete construction is being formed, whereas the form tie shown in Figures 1 to 4 inclusive may intermediate the ends of the tie: and between the portions of the tie engaged by the form boards.

Preferably, the moisture blocking loops are ofa size such that the loop will not be contracted or reduced under the strain of the wet concrete or the tension applied tothe form tie by the forked loops at one or both ends of the tie,

It' will be obvious, from the foregoing, that a preformed tie can be provided so that the form boards will be spaced apart the desired distance, thereby eliminating the necessity of measuring the distance apartof the form boards-and also eliminating undue pressure on the ends of the tie where the form boardsbulge outwardly a slight. distance. f

This form tie embodies a construction such that where desired, the spacing members for,spac-. ing the form boards-apart may, be eliminated, in 1 which case the forked bar holding member 16 will act to prevent movement'of the form board'jlly relative to the form boardLlO.) In other words, 'the two'loops. 17 and 26'may. be twisted so as to tighten the bar 27 in theloop 16, and due to the construction'of the loop 16, this loop cannot move relativeto the opposite loop 21;

tened out, the tie can be used to hold the form boards in adjusted position and the forked loop 16 can be tightened without'danger of the work man pinching in certain portions of the .form boards as is the case'where no spacing members are used in form ties of a construction not em- 'bodying the looped structure 16.] g e It is, of course, understood that various changes and modifications may be made in the details of construction and design of the above specifically described embodiment of this invention without departing from the spirit thereof, such changes and modifications being restricted 'only.

by the scope of the following claims. What is claimed is:-- j 1 V 1. A form tie comprisinga single wire member looped upon itself to. provide a plurality of strands, the strands being twisted about"each other, a closed loop formed atone erid' of the prevent the passage of moisture a saddle within the open loop.

2'. A form tie comprising a single wire member.

therealong, and

shown the tie members as being looped in a manner to provide ajplurality of parallel wire'strands twisted about each other to form a single tie member for embedding in con 7 crete, a closed loop at one end of the tie member;

an'open loop at the other end of the 'tie'fmember,

the free ends of the open loop extending out 1 wardly, and a saddle within the openloop. I

13. Af,orm tie comprising a. single wire-strand looped upon itself and twisted intermediate the ends of the looped portions to provide a single 'loop at one end, an intermediatei'twisted .portion, an open loop at the other endwith the'openi'ng'of the loop directed outwardly,"r"neans intermediate the two loops to prevent movement Qoi form boards positioned at each end of, the twisted portion, and a saddle Within the open loop. 1

loop at the other endof the tie portion, the open- 4. A form'tie comprising amember constructed ing of the latter loop extending outwardly, means formedintermediate theends of the twisted portion to .prevent passage rof water or 'moisture therealong, and a saddle within the open loop.

5. A form'tie comprising a member. constructed of a single strand of wire looped upon itself, certain portions of.,thef looped portions being twisted together to form a relatively rigid tie,

member, an'open'loopfat each end of the tie member,and a saddle within each open loop.

6. A form tie comprisinga member adapted'to hold opposing walls ofia form in spaced relation to each other, saidmemb'er comprising a single vide a twisted central portion, wall holding mem wire strand looped upon itself. ina manner to pro- I bers at each end of the central portion, anopen closed portion of said loop constitutinga saddle to tate tightening of thefwall engaging member within the closed portion of the loop.

'7 A form tie, comprising amember constructed 8. Aform tie, comprising amember constructed I 'loopat one end of the central-portion, the'open- H ing of said loop extending outwardly and the It will, therefore, be seen that where the spac- 5 ' ing members 14, 19 and 20 are eliminatedor'flatof a single strand of wire loopediupon itself, certam portions of .the wire being twisted together, and a substantially U -shaped saddle at an end of the tie member. having the free, ends thereof ex I tendingoutwardly of the member.

of a single strand of wire, looped upon itself, certainportionsof the wire'being twisted together,

member having the free endsextending outwardi ly, and a pair of loops integrallwiththe' free ends a substantially U -shaped, Saddle at one end of the of the member and the saddle.-

disposed one :on each side of 9; A form tie, comprising amember construct- 1351 ed of a single strand of wire looped upon itself, i

a substantially U-shaped saddleat an endof the member, said saddle having thefree endsthereof disposed outwardly, and a pair of loopsi ntegral with the free ends of the member and the ,tiei 1

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