US1203327A - Process of making concrete construction. - Google Patents

Description

, F. W. HARDING.

PROCESS OF MAKING CONCRETE CONSTRUCTION. APPLICATION FILED DEC.26. 19H.

1 ,203,327. 7 Patented Oct. 31, 1916.

UNITED STATES PATENT OFFICE.

FOSTER W. HARDING, OF SANTA ANA, CALIFORNIA.

PROCESS OF MAKING CONCRETE CONSTRUCTION.

Application filed December 26, 1911.

To all whom it may concern:

Be it known that I, Fos'rnn TV. HARDING, a citizen of the United States, residing at Santa Ana, in the county of Orange and State of California, have invented a new and useful Process of Making Concrete Construction, of which the following is a specification.

My invention relates to concrete construction, being particularly designed for piles, such as are used in wharf and pier construction.

It has been customary to place reinforcement, such as metal rods, struts, etc., in molds which are either set in position in which the work is to be permanently placed, or the work is built up in sections, which sections are made in forms. In either case the reinforcement is placed in the form and the concrete poured into the form; but in mv invention the reinforcement and the concrete are placed in the forms at the same time, the reinforcement having one end secured to a suitable core and the reinforcing material and the concrete built up on the core by rotating the same, and one of the main objects of my invention is to produce a concrete construction of maximum strength and durability in a simple and economical manner.

Other objects and advantages will appear hereinafter from the following specification.

Referring to the drawings. which are for illustrative purposes only: Figure 1 is a. front elevation of a device adapted to produce a concrete construction embodying a form of my invention. Fig. 2 is a. sectional view on line n"-.r'- Fig. 1. Fig. 3 is a sectional view. similar to Fig. 2, after the completion of the operation. Fig. 4 is a sectional view. similar to Fig. 2. showing a modified form of my invention. Fig. 5 is a side elevation of a concrete construction shown in Figs. 2 and 3. Fig. (3 is a side elevation. partly in section, of the concrete construction shown in Fig. 4.

The apparatus used in my concrete construction consists of a suitable form of mold 2 formed of two members 3 hinged together at l, the upper portion of each member terminating in an outwardly flaring wall which walls 5 together form a longitudinal feed opening (3. Each member 3 is provided with an end piece 7 which extends inwardly therefrom and fits over a core or foundation 8. The two members 3 are held in closed Specification of Letters Patent.

Patented Oct. 3 1916.

Serial No. 667,986.

position by any suitable closure means, such as eyes 9 on the respective endpieces 7. the opening in the eyes being adapted to register, when the members 3 are in closed position,to receive a wedge or key 11. The reinforcing element consists of wire netting 12 provided at intervals with longitudinal reinforcing rods or bars 13 secured thereto, which rods or bars extend upwardly from the face of the wire. A roll of the wire netting is mounted on a spool 11 supported in suitable brackets 15 above the mold or form 2, the spool 11 being frictionally held against rotation by means of a shoe 17 slidably mounted in a bracket 18, which bracket 18 is supported on one of the brackets 15, the shoe 17 being held against the end of the spool 1% by means of a coil spring :20.

It is understood that the mold or form 2 and the wire netting or reinforcing element may be made any desired length, by lengthening each of the same, to meet the special requirements of the Work being performed.

In the form shown in Figs. 1, 2, 3 and 5, the device is shown as used in the application of a concrete reinforcement or protection for a wooden pile, the concrete being placed on the pile at that portion of the pile adjacent to the water level, being that point in which the pile is subjected to the greatest wear and strain. This is accomplished by placing the core, in this instance consisting of a wooden pile, indicated at 8, in the mold 2, the pile 8 projecting beyond each end of the same. One end of the rein forcement or netting 12 is then secured to the pile by means of nails 21 or other suitable fastener, and the pile rotated by any suitable means in the direction of the arrow shown in Fig. 2, during which rotation concrete is poured into the opening 6 of the mold. The rotation of the pile 8 causes the reinforcement 12 to be built up thereon in spiral form together with the concrete until the concrete andreinforcement fill the in terior of the mold between the pile and the mold. The reinforcement is then cut and the pile rotated several revolutions for the purpose of smoothing the exterior of the concrete, and the concrete is then permitted to set. the construction resulting from this operation presenting a cross sectional. appearance as shown in Fig. 3 and an external appearance as shown in Fig. 5. During the revolution of the core the bars 13 on the netting 12 serve as carriers to take up concrete from the bottom of the mold and deposit the same between the rolls of netting.

If desired, a hollow concrete pile may be constructed by following out the operation above described, except that in fastening the reinforcement to the core the reinforcement is lightly fastened to the core so that after the concrete has set the core may be pulled longitudinally out of the concrete construction, thereby leaving a hollow concrete pile, the inner face of which consists of wire netting and concrete, as shown in Figs. 4 and 6.

While I have shown and described my in vention as applied to the building of concrete piles and coating or reinforcing wooden piles with concrete, it is to be understood that my construction may be applied to various purposes without departing from the spirit of my invention, such as concrete columns, pipes, and numerous other forms of construction.

The operation of forming the pile is continuous, the machine not being stopped during the simultaneous operation of winding the reinforcement and pouring the cement until the pile is finished.

What I claim is 1. The process of producing a reinforced concrete pile which consists in rotating :1 core, winding a spiral reinforcement about said core, adding concrete to said reinforcement during the time it is being wound on said core, and so restraining said concrete that it can at no time during the winding operation exceed acertain diameter.

2. The process of producing a concrete pile which consists in rotating a core inside a cylindrical mold concentrically located with regard to said core, and simultaneously winding a spiral reinforcement about said core and adding concrete to said mold.

3. The process of producing a reinforced concrete pile which consists ,in rotating a core concentrically located inside a cylinder, winding a spiral metal reinforcement on said core, said reinforcement being introduced into the cylinder through a slot in the top of said cylinder, and introducing concrete into said cylinder through said slot during the time the core is being rotated.

In testimony whereof, I have hereunto set my hand at Fullerton, California, this th day of December, 1911.

FOSTER W. HARDING.

In presence of Lee W. KELLEY, R. B. ROBINSON.

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