US1961580A - Pavement joint - Google Patents

Description

, June 5, 1934. I H. BROWN Jahn EH. Brumm zzzm/ EW:

Patented June 5, `1934 A i UNITED STATES PATlslwl';j OFFICE PAVEMENT JOINT Jtlm E. H. Brown, Elgin, 111. Application November 14, 1931, Serial No. 574,938

3 Claims. (Cl. 94-1.5)

My invention relates in general to pavement the downwardly extending element 2 may be joints, and more specifically to aweakened plane made in any desired form, such as a single center joint for street pavements or thelike, part projecting downward, the only requisite which also serves as a traffic line marker. being to provide an element which gives a divid- As is well known, it has been found advisable ing line in the pavement lor separates the two 60 to provide a longitudinal center joint in concrete sides thereof. The upper' ends of the V-shaped highways to compensate for the expansion and channel are bent outward and extend horizoncontraction of the pavement during changes of tally like distances and are then Curved upward temperature. For instance, during the night an and inward to form hook-shaped o1 curled edges l() inequality of cooling is known to cause longialong the length Of the Strip. At Various dis- 65 tudinal cracks in the road. In order to overcome taIlCeS 310mg the hOlfiZOIltal DOltiOhs Of the Strip this, it has become the practice to provide an a series of arrow-shaped anchors, Such as 3, expansion joint` or weakened plane along the are punched Out Of the body f the material center of the road so that the edges can lift and and bent dOWllWaId at right angles, as Clearly l5 fall'without cracking the road at any point eX- ShOWIl in Figs- 1 and 2- These aIlChOlS may, 70 cept along that plane. It has also been common 0f Course, be Of any desired Shape other than practice to apply a center line painted or simithat ShOWh, the main requisite being that the larly applied, along the center of the pavement We1` DOFtiOIl iS enlarged t0 DlOVde anchors or longitudinally to separate trame lanes, holding surfaces to hold the device securely to It is, therefore, the object of my invention to the QOHCIete When the anchors are embedded 75 provide an improved center joint which eiiitheleln cently Supplies a longitudinal weakened plane In the flat Channel frn'led the llorlzontal along the center of the pavement, and which Section5 0f Daft 1 and the Curved edges thereof also provides an improved traffic lane marker 1s inserted a preformed strip of filler or mastic which is lasting and easily applied. material, such as 4, which may be similar to 80 Among other Objects of my nventjdnare; To that used in preformed expansion joints, which provide an improved traflic lane marker of masitS snugly in Place between the curved edges. tic or other material, anchored in the pavement, These edges may, if desired, be clamped down and which may be of any desired C0101-, to hold the ller more securely and may lie o0 To provide a weakened plane center joint efhbel0W the upper edges thereof. The ller used is 85 eiently anchored in the pavement sealed at the preferably of bituminous material, it may vary in top by preformed or mastic material, which maform and C0101', and SelVeS the dual DHIDOSe 0f terial also provides the traic lane marker. v sealing the tOD 0f the V-Shal3ed element 2, and other objects of improvement not specifically also acts as a trame lane marker longitudinally mentioned will be appar-ent from the following alone the Center of the highway. The mate- 90 detailed description of the embodiment of the lial iStOllgh and lasting, and fibel, felt, 01 other invention disclosed inthe accompanying draw Alleilthening materials may be used t0 toughen ing 6 ET.

Fig 1 is a sectional View of the device of my After the device is formed from strips of sheet 40 invention showing it in position in a pavement metal aS ShOWh irl Fig. 2, the tOD Surface 0f Dart 95 and with the pavement cut away to show the 1 iS Preferably COated With asphalt or other anchors in position. waterproof adhesive and the strips 4 are in- Fig 2 is a View taken from the bottom of a, serted and the devices are ready for use on a section of a strip with the lower end tilted up highway- The strips may be made of any deshghtly, sired length convenient for handling and ship- 100 Fig. 3 is a top view taken from a slight'angle pingoi a center joint in position in a pavement. The assembled Strips are IJlaCed in the high- Referring to the drawing, 1 designates a strip Way as shown in Figs. 1 and 3 with the concrete of sheet metal formed as shown with an element level With or' Slightly abOVe the strip 4. The

2 extending downward from the center portion anchors 3 are as shown embedded in the con- 105 thereof. This element 2 may be of substantially crete and hold the device securely in place. V shape as shown in the drawing, or the twol The strip is preferably secured in the pavement sides of4 the V-shaped element 2 may be close after the concrete has been poured and is formed together and parallel to each other if desired. into place Ias shown before the concrete has set.

Also, it should be understood that if desired It will thus be seen that the part 2 extending .110

below the strip 4 provides a weakened plane along the center of the highway so that if the edges of the pavement tend to rise or fall with expansion and contraction the pavement will crack or give only along the line of the provided weakened plane.

The traffic lane marker provided by strip 4 is also Very desirable, and is a distinct advance over the present method of painting a strip along the center of the roadway. The strip 4 being of bituminous, asphaltic, or other compound will act as a preservative to the metal strip of material forming the weakened plane since with high temperatures bituminous elements of the strip may melt and flow over the metal strip to preserve it from rust.

Having fully described the features and aspects of my invention, what I consider to be new and desire to have protected by Letters Patent will be pointed out in the appended claims.

What is claimed is:

1. A combined weakened plane center joint and traino lane marker consisting of a wide strip of preformed mastic material flush with the upper surface of the concrete, a metallic member having its outer edges curved over the edges of the strip and extending ush with the under side thereof to the center of the strip, said member having a loop projecting down into the concrete and projections cut out from that part of the member flush with the under side of the strip, said projections anchored in the pavement to hold both the member and the strip locked to the pavement.

2. A trac lane marker comprising a metallic strip having a V shaped part extending downward into the concrete acting as a weakened plane, extensions from the sides of the V part extending outward parallel to the upper surface of the concrete and just below said surface, anchors embedded in the concrete attached to the under side of said extensions, and a strip of preformed mastic material lying on said extensions and secured thereto by the edges thereof bent over the edge of the strip.

3. A combind weakened plane center joint and traino lane marker for a pavement formed as a unitary structure from sheet metal having a fold extending down into the pavement, the ends of said fold bent outward near the surface of the pavement and parallel to the surface thereof, said ends bent over and partly enclosing a strip of preformed mastic material, and. anchors extending into the pavement from said ends holding the joint secured t0 the concrete.

JOHN E. H. BROWN.

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