Патент USA US2107827код для вставки
Feb. 8, 1938. J. w. KERR ' ' ' 2,107,827 DIVIDING AND REINFORCING MEANS FOR‘ CONCRETE ROADWAYS Filed July 17, 1934 1W‘ _ * ' 8 5 . ‘ ' 9 I T 176% Hlfférr, . Ly. Patented Feb. 8, 1938 2,107,827 ul"§>.'v.i<umnzb STATES PATENT OFFICE DIVIDING AND‘ REINFORCING MEANS FOR. CONCRETE ROADWAYS . ‘John .Willard Kerr, Chicago, 111., assignor to Ernest H. Geyer, Chicago, 111. Application July 17, 1934, Serial No. 735,671 3 Claims. My invention relates to dividing and reinforc ing means for concrete roadways and has for its object to provide a simple and inexpensive joint strip and dowel rod which will serve the purpose 5 of holding the slabs of opposite sides of the mid dle of the roadway ?rmly against relative verti cal movement, and will at the same time permit such hinging along the mid-line as may be caused by unavoidable stress. A further object of my in vention is to provide a joint strip of simple con struction that will hold the dowel rod horizontal. A further object of my invention is to provide improved means for connecting successive sec tions of joint'strip. 15 With the objects above enumerated and other objects hereinafter explained in view, my inven tion consists in the construction and combination of elements hereinafter described and claimed. Referring to the drawing: 20 Figure 1 is a plan view of a roadway showing my dividing and reinforcing or joint strip in position. ' Figure 2 is a side view of the joint strip. Figure 3 is a vertical sectional view on line 25 3-3 of Figure 2. Figure 4 is a view similar to Figure 3 but show ing a cap strip for the upper edge of the joint strip. 30 Figure 4a is a fragmentary top plan view of the cap strip. Figure 5 is a side view showing my connecting strip in position. Figure 6 is a vertical sectional view on line 6-—6 of Figure 5. 35 Figure 7 is a plan view of the clip. Figure 8 shows the dowel rod bent into double S-shape. In the drawing, l indicates the central por tion of an underlying roadbed ready to receive a 40 concrete roadway. 2, 2, indicate roadforms usu ally arranged longitudinally of the roadway at its side edges. 3 indicates a longitudinally ex tending joint strip preferably are shaped in cross section arranged midway between and parallel 45 with road forms 2, 2, to separate the concrete of the roadway into a right hand and a left hand strip or slab to lessen the effect of expansion and contraction of the concrete, the joint strip con sisting of a strip of sheet metal of a width cor 50 responding to the depth of the concrete at the middle of the roadway, preferably slightly less in width than the depth of the concrete. 4 indicates a dowel rod carried by the joint strip in a plane between its upper and lower 55 edges and extending laterally in both directions (Cl. 94-17) into the masses of concrete with the purpose of so holding them as to permit slight movement under the in?uence of heat or cold without per manent relative displacement. This dowel rod 4 consists of a metal rod of any desired diameter, -. usually a quarter or three-eighths of an inch, bent into zig-zag form so as to present on each side of a median line a succession of angles or hooks 41, 42, 43, 44, 45, 46. In Figure 1 the angles or hooks 42, 44, and 46, are shown as extending through joint strip 3. The joint strip is pro vided between its upper and lower edges with a series of longitudinal apertures 5 each of a length corresponding to the distance, on the median line of the zig-zag, between the two legs or angles or 15 hooks 42, 44, and 46, so that the angles or hooks on one side of the joint strip will extend into the concrete the same distance as do the angles or hooks on the other side. The dowel rod may be bent into various forms, as for instance, the double 8 shape shown in Figure 8. The edges of longitudinal apertures 5 are pref erably turned outward, so as to form parallel lips 51 and 52 on the inside of the are which serve to hold the dowel rod in horizontal position. 25 These lips may be pressed toward each other to clamp the dowel rod between them. If desired the joint strip may be provided with additional apertures 6 to receive additional dowel rods and the apertures may be on any line be- 30 tween the upper and lower edges of the joint strip. Before completing the ?lling in of the con crete against the sides of the joint strip it is de sirable to place on its upper edge the cap strip l2 shown in Figure 4. This consists of a hori M5 zontal top portion II from the opposite edges of which depend ?anges I2 and I3, the lower edges of which are bent outward to, form horizontal ?anges I 4 and I 5. In these ?anges are found 40 openings [6 large enough to permit concrete to ?ow through them. In order that the joint strip may be continu ous, separate strips 3 must be held together at the meeting ends. For this purpose the strips are provided near their ends with vertical aper tures l and the strips are held together by tongues 8, 8, extending through these apertures ‘I from a clip plate 9, the upper edge portion In of which is bent over the contiguous upper edges 50 of the two strips 3. Having thus described my invention, what I claim is: 1. A dividing and reinforcing strip for con crete roadways comprising a ?at metal strip hav 55 »2 2,107,827’ ing straight upper and lower edges and having between its edges a row of longitudinally extend ing apertures and an anchoring member of such zig-zag form as to present angularly projecting members extending laterally in opposite direc tions from a median line, the apertures in said metal strip being each of such length as to per mit an angular projection of the anchoring mem ber to be passed through it. I 2. A dividing and reinforcing strip for con 10 crete roadways comprising a flat metal strip hav ing straight upper and lower edges and having between its edges a row of longitudinally extend ing apertures and an anchoring member of such 15 zig-zag form as to present angularly projecting members extending laterally in opposite direc tions from a median line, the apertures in said metal strip being each of such length as to per mit an angular projection of the anchoring mem her to be passed through it, and each having its longitudinal edges outturned to form a guide and support for the anchor member. - 3. A dividing and reinforcing strip for con crete roadways comprising a flat metal strip hav ing straight upper and lower edges and having between its edges a row of longitudinally extend ing apertures and an anchoring member of such zig-zag form as to presentv angularly projecting members extending laterally in opposite direc 10 tions from a median line, the apertures in said metal strip being each of such length as to per mit an angular projection of the anchoring mem ber to be passed through it, and each having its longitudinal edges outturned to form a guide and support for the anchor member, and caused to clamp the anchor member. JGHN WILLARD KERR.