US1807364A - Dowel bar support - Google Patents

Description

May 26, 1931. v w. E. WHITE I 1,307,354

DOWEL BAR SUPPORT med June a, 1929.

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Patented May 26, 1931 UNITED STATES PATENT OFFICE WILLIAM E. WHITE, OF CHICAGO, ILLINOIS, ASSIGNOR TO KALMAN STEEL COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF DELAWARE DOWEL BAR SUPPORT Application filed. June 8, 1929.

My invention relates to concrete road con-' struction and particularly to a novel support for the transverse rods or bars extending between adjacent slabs. The construe tion is an improvement on that shown in Figs. 7 to 10 in my Patent No. 1,631,609 of June'7, 1927.

In the process of building concrete roads, it is customary to install a sheet metal or other 10 parting strip and to provide a. plurality of transverse rods extending across the joint between adjacent slabs, with their ends embedded in the concrete. I Some means must be provided for securely retaining the rods or dowel bars in posit-ion during the process of pouring the concrete, and the supporting chair herein disclosed is particularly adapted for the purpose.

My novel chair is of extreme simplicity, of relatively small cost and possesses adequate strength for the purpose.

The construction will be more readily understood by reference to the accompanying drawings, in which 7 Fig. 1 is a perspective view showing the supporting device in operating position; and

Fig. 2 is an enlarged side elevation of the chair. g

In the drawings, I have illustrated a slab 10 of concrete, a metal parting strip 11, a

dowel bar 12 projecting through an aperture in the strip, with its ends supported by the chairs of my invention.

These chairs consist of a single length of Wire bent into an outline resembling a figure 4. The stem 13 of the 4 constitutes a leg or stake, being straight and having a pointed end. At the upper end of the leg the wire is given a complete turn, thereby forming an eye 14 for the reception of the dowel bar. The wire rod is then continued diagonally downward as at 15 then horizontally as at 16 to form the transverse stop which serves to define the limit of the insertion of the leg 13 into thesoil. The foot Serial No. 369,437.

portion 16 therefore acts as a gauge for determining the vertical location of the dowel bar in the concrete block.

The manner of installation is obvious. If the soil is hard, a few blows on the top of the eye will serve to seat the chair in position without distorting the eye. The shape and arrangement of the foot is such that when installed it resists the movements that would tend to permit the bar to assume an improper position; that is, it effectively resists vertical and later motions of the bar that might be induced by the pouring and tamping of the concrete.

The design of the chair is such that it may be formed in an automatic wire machine and thus produced very cheaply. While it is desirable to arrange the portion 15 diagonally as shown in order to brace the foot 16, it is obvious that it might be arranged parallel to the leg 13 with advantageous results. This and other modifications are considered to be within the scope of my invention.

I claim:

1. A bar support formed from a length of wire rod having a vertical leg adapted to enter the soil, a complete turn of the wire at the top of the leg providing an eye, the rod then extending downward and terminating in a horizontal portion located midway of the height of the leg and acting as a stop.

2. A dowel bar support consisting of a single length of wire bent to provide a vertical leg adapted to enter the soil, the wire at the upper end of the leg being formed to provide an eye to receive the bar, the wire thence extending downward and terminating in a horizontal foot, said foot extending across the leg and being of substantial length to insure ample supporting area for a load carried by said leg.

3. A dowel bar support consisting of a single length of wire bent to provide a vertical leg adapted to enter the soil, the wire signature.

WILLIAM E. WHITE.

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