US877734A - Reinforced concrete construction. - Google Patents

Description

PATENTED JAN. 28

' R.'G. BROTHER REINFORCED CONCRETE CONSTRUCTION.

APPLICATION FILED JULY 16, 1906.

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' Specification of Letters Patentf Application filed July 16.1906. Serial No. 326.304.

Patented Jan. as, 1908,

To all whom it may concern:

Be it known that I, RICHARD G. REUTHER, a citizen 'of the United States, residing at Detroit, in the county of Wayne, State of Michigan, have invented certainnew and useful Improvements in Reinforced ConcreteConstruction; and I do declare the following to be a full, clear, and 'exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the thereon, which form a part of this specification.

This invention relates to concrete and metal construction of the type commonly known as reinforced concrete, and consists in the association and arrangement of arts hereinafter fully set forth and pointe out particularly in the claims.

[The object of the invention is to provide means whereby a concrete beam or span may be reinforced with metal chords or girders longitudinally and with web members leading from said 7 chords, whereby the elements of a truss are produced, the arrangement being'such as to secure the maximum amount of 'strength with a minimum weight of metal.

'The above object is attained by the structure illustrated in the accompanying drawings, in which Figure 1 is a sectional view through a concrete or cementitious body, showing the application of my invention in trussing said body between its terminal supports. Fig. 2 is a fragmentary view in perspective, showing the manner of associating the major and minor members of the reinforcing metal.

Fig. 3 is an elevation ofthe structure shownbroken away, illus-- in Fig. 1, parts being trating the employment of a second longi-. tudinal member engaging the terminals of the inclined minor members. Fig. 4 is a transverse section through a cementitious body, showing the structure illustrated in Fig. 1. Fig. 5 is a similar view illustrating the application of the structure shown in Fig. 3. Fig. 6 is'a detail in transverse section as on line 6-6 of Fig. 3.

Referring to the characters of reference, 1 designates the major member of the reinforcing metallic. members, which is placed of and within the concrete or cementitious body 2 to correspond with the chord of a truss. The minor members 3 are figures .of reference marked.

connected with the major member and ere i tend at an incline therefrom in opposite directions corresponding in their. function with the web of a truss and transmitting the stress which is placed thereon to the major member.

'The major memberl of the reinforcing 2 members is preferably formed of a round, metallic bar of the requisite length and diameter for the work desired. To provide web members 3 and connect them to the major member in a manner to prevent weakening the major member, I form said minor or web members of steel wire of a suitable gage, which is wrapped spirally around the major member, as shown at 4, and at recurring intervals ina closed coil, as shown at 5, from which coil the wire leads outwardly and the double strands thereof twisted together to form the web members 3, preferably provided with the loops 6 at their ends. Said web or minor members are preferably formed in pairs, as shown, beingarranged to diverge from their common point ofattachment to the bar and being preferably inclined in the direction of the longitudinal axisof said bar.

By employing a strand of wire from which to form the minor or web members, said members may be produced asjoften as the character of the work maydemand, and may be inclined in one'direction or in 0 p0- site directions, as desired, while the emp oyment of a round bar upon which to mount the web members serves greatly to strengthen is wound about the bar 1 I the cementitious body because of the stiffness of said bar.

The s iral wrapping of the wire around the bar hol s said bar against longitudinal movement in the concrete bed, while th'e-securin of the ends of the wire by passing its termina through the transverse 0 site ends of the bar, as s own at 7 in Fig, 6,

prevents the bar turning within the wrapping of wire.

In order to cause the bar to lie in a proper position while being embedded in a cementitious body, the opposite ends of the wire are formed into thelaterallyprojecting loo s 8 which rest upon the support for the en s of the bar and hold the bar from tilting.

Where a greater carrying capacity is required than that afforded by shown in Figs. 1 and 2, additional bars 9 may members 3, where the structures enings in the oppo- 110" be employed by assing them through the is distributed between the main bar '1', and'the 1 .7 ,loo )8 of can 30,:

whole structure is tied together and theweigh-t auxiliary bars 9 through the medium of the minor members 3.

The structure shown in the drawing is that I what" I 0 im as new and desire to Letters Patent, is: 1. Ina reinforced concrete structure, the combination of a cementitious body, a long tudinal stremgthening bar therefor of relativelylarge diameter, a single metal strand of relatively small diameter Wound spirally around said bar. to extend from. end to end secure by thereof, ortions of said strand intermediate 2,5, g

1 int'o pairs of vloops, each pair of loops being its ends cing drawn outwardly at intervals formed .into minor stress members by twisting said 100 edportions oi the strand and the 2 pair being rigidly secured to the bar by having their base portions Wound directly therearound said minor stress memin the cementitious body. A

hers projecting from the main member at an angle and' all of said members being embedded 2. In arei-nforce'd concrete strudture, the rco'mbination'with a cementitious body, of a longitudinally extending strengthening of relatively large diameter, a metal strand wra ped spirally around saidbar and extend ing om end'to end thereof, said strand intermediate its ends being drawn outwardly into loops and twisted to form projecting minor stress members, and said strand having its ends passed through the ends of the strcngthening bar to rigidly secure the ends of the strand to the bar.

3. I In a reinforced concrete structure, the combination with a cementitious body, oi a roundstrengthening bar of relatively large Having thus fully set forth my invention,

sniper diameter extending longitudinally thereof, a metal strand. wra 'mecbsplrally around said bar, said strand intermediate its ends being drawn outwardly into loops and twisted to form diverging minor stress members, the ends of said strand being passed through the ends of said her t6 rigidly secure the ends of thes'trandthereto, the ends of the strand being 'l'or 'ned' 'lnto bearing members to prevent the bar turning W hen placed in. position, and all of sai'dparts being embedded in the cementltious body,

' 4 In a reinforced concrete structure, the

combination with. a cementitious body, of a rigid longitudinal strongtheningbar of relatively large diameter, a plurality of minor strengthening members consisting of-diverg ing twisted strands formed of a single strand wound around the bar from end to end, said twisted StlI'flXKlSdwl ng connected in pairs along the bar and each pair being rigidly connected to the bar to prevent independent move-- ment of said parts and extending obliquely from said bar, said minormernbers having loops in the outer ends thereof, an auXiliar longitudinal strengthening bar passed throng each of the loops in said minor members and all of Sfild parts being embedded 111 said. (Jenn entitious body.

5. A reinforcing member for concrete con struction, com arising a longitudinally ex tending strengthening bar of relatively large diameter, a metal strand wrapped spirally around said bar and extending from end to end thereof, said strand intermediate its ends being drawn outwardly into loops and said loops being twisted to form diverging minor stress members, the base of said loops belng Wrapped directly around the strcngthenin bar and the ends of said strand being passed through the ends oi. the barto prevent independent movement of said parts.

In testimony whereof, I sign this specification 111 the presence o'l' two Witnesses.

RIOI IARD G. REUTHER.

Witnesses E. b. WHE ELER, I. (3.. HoWLnrr.

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