US924090A

US924090A - Reinforced concrete construction.

Info

Publication number: US924090A
Application number: US45087808A
Authority: US
Inventors: Egbert J Moore
Original assignee: Individual
Current assignee: Individual
Priority date: 1908-08-29
Filing date: 1908-08-29
Publication date: 1909-06-08
Anticipated expiration: 1926-06-08

Description

E. J. MOORE.

REINFORCED CONCRETE GOHSTBUUTIQK APPLIOATIOH FILED AUG. 29, 1908 I Patented June 8, 1903.

Em'I IIIIIA VIII - inventar 5; Aizfv Attesi:

v To all whom it may concern:

ED S

Earner (J. Moons, or

Beit.known that I, Eennnril; N[00RE, a citizen of the United States, and resident of Yonkers, countyof Westchesteniand State of New York, have invented certain new and useful Improvements in Reinforced Concrete Construction, of which the following is aburied in the massof concrete when it hardens;' 'lhe concrete is 'ta'mped in the mold and owing to this operation, it is very. unceram whether the reinforcinglbars are displaced from their'properpositi'ons and the whole construction thus rendered defective and'weak. Means for preventing the displacement: of the bars are, therefore, very rtant and to providesuch means, as as "to provide means for properly positioning the, reinforcing .bars' in the mold so that they will be enveloped in the concrete "withfa suficient covering of concrete on all sides to obviate all danger of damageby fire, suchpositioning being required by fire-laws in nearly all pities. v p I,

With these objects in view, .my invention consists broadly in a frame work, of metal reinforcing bars for such construction which will. be always held or maintained inproper position during the filling and tampmg ofthe mold and consequently properly position'ed inthe finished concrete beams.

My invention further consists in the. innroved constructiomarrangement and coin ination of parts hereinafter, fully described and afterward specifically claimed.

I have illustrated ,an embodiment "of fif-k invention theaccompanying drawing in ,L Figure 1 is adiagrammatic plan view of; part of the mold for a-;floor, beams girders, with aframe work of reinforcing bars. in place therein, ready for pouring the concrete. .Fig. 2 is a. (view: partly in eleva-' ,7. Specification of lietters Patent.

YoNKEns, New YORK.

nnrnroncnn concnn'rn oons'rnuorron.

Patented June s, 1909.

Application'filed August 29, 190$.fSeria1No. $50,878.

the mold and framework on the line 3-3 of Fig. 1. Fig. 4: is a view in elevation of one .of my. roved bridge-pieces used in asseinbling .t e parts of the framework. Fig. 5 is a similar view showing in full and dotted lines, modified forms of bridge pieces Referring specifically to the drawing, A indicates a metal bar roughened in any approved manner to prevent it slipping in the concrete, in this instance being angular in cross section and twisted to form spiral ridges throughout its length although this specific form, while perhaps preferable, is

of a form in cross section with. that of the bar A.

C, 0 indicate bridge pieces substantially of inverted U shape and preferably made of corresponding .used if desired. The shape of these pieces is shown in Fig. 4: there being formed in the upper edge of each a substantially semi-circular recess, seat ornotch C, and two simila rly shaped recesses, seats or notches C in the under surface, the egs C being-shown as tapering toward the bottom from the points C to the bottom. The recesses C, and C C alternate witheac-h other, the former being intermediate of the latter.

\D, 1) indicate metal stirrups formed of .strap or band iron of a suitable weight to permit of bending readily but at the same timeto retain their bent "position, a suitable 1% by inches.

. To secure the three bars A, B, B together in position for use, the upper bar A may be placed with the part A on'the floor with the ;st1rru'p s'D, D, placed astride of this bar so that .the middle loops thereof embrace or set bverthe part A. The two'bars B, B are tion and partlyvin'; section, showing the beam, girderand framework." Fig. 3 is a sectional parallel with the part A and in the two side loops of each of the stirrups. A workman not necessary to the proper operation of the thickness for general purposes being aboutparts A A in a vertical plane and the two view ona plane cutting transversely through B, B indicate straight metal bars shown as cast metal although other materials might be v now placed, one on each side of bar A and i upper bar' A; being intermediate at each e nd holds down the bars B, B by placing his foot thereon, or otherwise, and raises the center bar A to the upper end of the middle loops of the stirrups. The bridge pieces C, C, are then inserted in the positions shown whereupon the bar A may be released, resting in the upper recesses C of the bridge pieces and hold therein by the middle loops of the stirrups, with the bars B, B resting in the side loops ofthc stirrups and held there in and in the recesses O C of the bridge pieces as shown clearly in'Fig. 2, the whole frame being held in position by virtue of the stiffness of'the bars A and B,

Another method of assembling the parts intoform is to place the bars A, B, 'B, in

approximately the relation they are finally to .hold with'each other, and separatin the bar A fromthe-bars B, B, by small r0 3 or blocks (not'shown). A blank for astirrup may now be bent at its center and placed over bar A with itsends'between the bars B, B, thus forming the middle loop of the stirrup. Theseends now be bent around the bars B, B, formin the side loops of the stirrups, and the bri g'e pieces inserted as before described.

lltwillbe observed that in the completed framewnrlni the bars A, B, B, are arranged so that-they lie substantially at the angles of a triangle, as clearly shown in Fig. 3, the of and in a diiferenti vcrtical plane-from those ofthe lower-bars B,-B. The elasticity of the bars will serve to hold them in position against displacement.

lanai-mas a fioor mold of which E is the trough in'which a beam is molded and E that in which a girder is molded.

A frame-work constructed as hereinbefore.

described is placed in each of the section's E of troughs E between the sections E the ends of the bars extendinginto and nearly crossing the sections E? as ShOWILlIl Flgs.

1 and 2, and when a sufficient number of such frameworks are in position, the concrete is poured in and tamped, 1n the usual manner,

2, the en The lens C enveloping the framework in beams F, Fig.

girders G and floor H, overlapping the ends of the next framework. v i rest upon thefioor E of the mold anol thus support the bars A, B, B, in proper vertical positions, and -the points, 0*

are of a proper size to position the bars away. from the sides'of the concrete of the beam,

' so that when the beam is finished, the reinforcin "bars will not be exposed to the action 0 fire or any other outside influence.

I desire it to beunderstood, however, that I do not limit myself toithe arrangement described, of three bars, I'may use any desired number by modifying the construcat C, for groups of seven bars.

of the-bars projecting into the,

Fig. 5. In this figure, the structure is shown.

in full lines'as suited for groups of firebars and by the addition as shown in dotted-lines Further extension may be ntade in the same manner.

What I claim as new is 1. A framework of reinforcing bars adapted to be embedded in concrete in a 'm old, comprising a group of substantially parallel bars, bridge pieces having notches to receive said bars, and stirrups passing alternately over and under adjacent bars to confine them in the notches of the bridge pieces.

2. A framework of reinforcing bars adapted to be embedded in concrete in a mold comprising a group of substantially parallel bars, bridge pieces having notches in their upper and lower edges to receive the bars, and stirrups passing under the bars in the notches in the lower edge and over the bars in the notches in the upper edge of the bridge pieces for maintaining the bars in the notches.

3. A framework of reinforcing bars adapted to be embedded in concrete in a mold comprising a group of substantially parallel bars, bridge pieces having notches in their lower edges, and notches 1n their upper. edges alternating with those in thelr lower edges, to receive the bars,and stirrups bent over the bars in the notches in the ups edges of the stirrups and bent outw'a tain the bars in position in the notches.

ed to be embedded in concrete in a mold comprising three bars substantially parallel e1 lyi and upwardly under the bars in the notches of the lower edges of the stirrups, to main-f- 109:

4. A framework .of reinforcing'bars adaptt with each other, two being below and one above and intcrmediateofthem means for fixing the bars. with relation to each other substantially at the three angles of a triangle and. stirrups bent over the upper bar and downward and then outwardly and upwardly under the two lower'bars, for retaining the bars'intheir relative positions.

5. A framework of reinforcing bars adapted to be embedded in concrete in a mold comprising transverse bridges of substantheir upper- 3.5143, lower edges and having .tially inverted U-shape having notches in their legs-extendefi laterally, in

- the notches, and stirrups entwined about the bars to hold them in the notches.

.6. A framework of. reinforcing bars. for

concrete construction comprising three bars substantially parallel with each other, bridge pieces of substantially inverted U-shape having triangularly located recesses in which said bars rest, one of said recesses belng 1n the upper edge and the other two in the lower edge of the bend of each of the bridge pieces, and stirrups, each provided with a central 10o passed over the upper bar for 5 holding it own in the 'upper recess and side Witnesses:

loops passed under the lower bars for hold S. BRAsHEARs,

ing them up into the under recesses." v r S. NEWTON.

Witness my hand this 17th day of August 1908, at New York, N. Y.

EGBERT- J. MOORE.