US1279431A - Joint for concrete structures. - Google Patents

Description

A. E; POULSTON.

JOINT FOR CONCRETE CTURES.

.APPLICATION FILED N 191 1,279,431 Patented Sept. '17, 1918.

, w Q 5, v M) JlZPaaZaZam v v l O dttoz oration;

" v UNITED STATES ARTHUR E. roULs'roiv, or RAVENNA, onro.

aom'r non CONCRETE s'rrwo'rnnns.

To all whom it may concern:

Be it known'that LARTHUR E. PoULs'roN, a citizen of the United States, residin at Ravenna, in the county of Portage and State of Ohi I Joint for Concrete Structures, of which the following is a specification;

This invention relates to joints for concrete structures such as roads, sea walls, retaining walls,,-fire walls, etc., where the concrete is. exposed to climatic changes and is necessarily formed in sections, therebyto allow for expansion and contraction. Owing to the relative movement of separate con- I crete sections andany metal housed in and connecting the same, it has not ordinarily been practical to connect separate concrete SBCtlOIiS w1th metal, concrete 1s exposed to severe climatic changes.

For example, in many-localities, concrete pansion sleeve being provided in connection with these metal members to permit said members to expand and contract independently of the concrete while, at the same time, holding the engaged sections of concrete in proper relation to each other under various climatic conditions.

A still further object is to provide an expansion sleeve of simple and inexpensive construction which can be. applied readily to the metal rods and embedded therewith Within the concrete at the time of the formation of the concrete sections, these expansion sleeves being out of direct contact with the rods, thus to allow for the free expansion and contraction of the rods.

With the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter de- Specification of Letters Patent.

have invented a new and useful particularly where the stitute eflicient supports.

material,

suflicient to keep the concrete Patented Sept. 1'7, .1918.

Application filed November 24, 1917; Serial No. 203,818.

scribed and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed, can be made within the scope of what isclaimed, without departing from the spirit of the invention.

In the accompanying drawings the present invention has been shown applied to a road construction and the preferred form of the invention has been shown.

In said drawings Figure 1 is a plan view of a sectionof a road formed of concrete and showing,

in dottedlines, some of the positions in which the expansion sleeves'and rods can be placed within the ends of the sections ofthe road.

Fig; 2 said section being on an enlarged scale.

Fig. 3 is a section on line 3-3 of Fig. 1. Fig. 4 is an elevation of an expansion sleeve. a

. Fi 5 is a longitudinal section through the s eeve and showing the rod therein.

Referring to the figures by characters of crete road, the ends of the section being preferably obliquely disposed as indicated, thus to permit the weight-of a load to be gradually transferred from one section to the other at the joint. The ends of the sections can, if desired, be mounted on inverted T- rails as indicated at 2 in Fig. 3, which con- The means employed for holding the sections of concrete flush under various climatic conditions includes a metal rod 3 which can be of any desired length and of any desired cross-sectional contour. This rod is provided with a sleeve 4 formed of thin material and which is slightly longer than the rod, the ends of the sleeve being closed by caps 5 which can be made of any desired.

so that spaces are thus left between the caps and the ends of the rod 3 to allow for expansion of the rod within the sleeve 4. The sleeve 4 can be made of any material desired. Under ordinary conditions it is preferred to make these-sleeves by wrapping the rods with waxed paper, the caps 5 being pressed out of waxed paper adapted to maintain their; shape while the sleeves are being embedded within the concrete as hereinafter pointed out. The sleeves can also be made of wood shavings wrapped about a is a section on line 2 2 of Fig. 1,

80 reference 1. designates a section of a 0011- are molded as ordinarily but within the ends "maintained at ll times with their faces flush and one cannot'be caused-to rise'or fall as a result of climatic changes, Without a corresponding movement of the other. The rods rod or they can'be made of fabric-which can be creosoted, ofglass, celluloid, metal or rubber. In fact the casingcan be of any material suflicient to completely surround the rod and prevent it from coming intocontact with the concrete in which the, sleeve or casing is embedded.

V In constructing; for example, a concrete road havlng the present improvements combined therewith, the sections of the road of the'sections are embedded the rods 3 with their'sleeves' 4 and caps 5 arranged thereon. These rods will extend into the ends of two adjoining sections and will bridge the space between the'sections, as shown particularly in Fig. 3. The'sleeves with the rods therein are preferably arranged with their uppermost portions approximately along a line extending transversely of the concrete road.

at the center thereof. The caps 5 will keep the concrete away from the ends of the rod thus leaving-spaces into which the rod can expand when subjected'to heat. The sleeve 4 will keep the concrete away from the rod' rod will not be interfered with.

By arranging a series of these sleeves and rods at the ends of they-sections as shown, for example, in -.Fig. 1, the"said sections will be so that the expansion and contraction of the crete is not permitted.

As the sleeve can be made of paper, the cost of incorporating the improvement in a concrete structure will not beobjectionable and will more than offset the cost of repairs and reconstruction which is constantly necessary in order to keep the ordinary concrete structure in goodcondition. What is claimed is t v The combination with a concrete structure made up of separate sections, of a rod extending into the meeting portions of the two sections, an expansion sleeve extending around the rod forholding the rodout of contact with the concrete, said sleeve extending beyond the endsof the rod, the ends of the sleeve being closed and spaced from the rod. i

In testimony that I claim the foregoing as my own, I have hereto aflixed signature in the presence of two witnesses.

I ARTHUR E. POULSTQN.

V Witnesses:

IVY E] SIMPSON," t I .PHILOMENA A. ROCKELLI.

Images