US1775278A - Construction of roadways and the like - Google Patents

Description

Sept. 9, 1930. L. GAISMAN 1,775,278

CONSTRUCTION OF ROADWAYS AND THE LIKE Filed July 16, 1928 3 Sheets-Sheet 2 @4. d! ffy-5- 7 El 'df/LD- j@ Z j@ 6.

Sept. 9, 1930. L. GAISMAN 1,775,278

CONSTRUCTION OF ROADWAYS AND THE LIKE Patented Sept. 9, 193() LUCIEN GAISll/IAN, yOF AUDNSHW, NEAR MANCHESTER, ENGLAND CONSTRUCTION ore neanwerfs ann THE LIKE Application led July 16, 1928, Serial No. 92,93S, and in Great Britain September 22, 192?.

This invention refers to roadways of the kind comprising a resilient surface applied to and supported by a relatively hard surface, usually in the form of blocks, the upper surfaces of which are in part formed of rubber or rubber composition.

One of the objects of the invention is to provide an improved roadway of the kind named giving an improved non-skid and comparatively noiseless surface, while a further object is `to provide a construction of block embodying in its top face the two materials'V for producing the improved roadway in a manner such as to prevent relative 1'5 displacement of such materials in all directions.

According tothe invention, 4the improved roadway comprises parallel and continuous (or substantially continuous) lines or '20 strips' of rubber or the like, and alternate continuous lines or strips' of hard road material, the lines running parallel with the normal direction oftra-vel of the tratlic and being spaced apart and of such a width that the wheels of most vehicles are supported partly on therubber,andv partly on the hardv material; kbut never on the hard material only. v

Paving blocks suitable for producing the .30 mainv parts of' the improved roadway are preferably made with two parallel grooves in their top faces, and in suchgrooves strips j of rubber or-the like are mouldedfthe top surface of the rubber lying flush with the top 05 surface of rthe block material, or being slightly proud of. same'. The size of the blocks and spacing of the rubber strips will besuch as to allow the rubber strips when the blocks 4are laid in staggered relationship, or otherwise,-to form a continuation of the stripsofthe Anext succeeding and preceding blocks. n

For-completing the roadway next a kerb, gutter, etc., the blocks are half-width and have oneY groove only. Alternatively, the whole roadway may be made of the halfwidthblo'c-ks with a single groove in which case `the blocks are laid end -to end and in other than staggered relationship.

The lformation of'. each `groove and/or of the block immediately below the groove is such as to alford a irm anchorage of the rubber to the block in all directions and especially in the direction of trahie, the preferred arrangement consisting of dovetail shaped re cesses in the floor of each groove, which latter may also be of dovetail cross section, or which may be of rectangular cross section with lateral notches in the ver-tical sides of the groove. The floor of each groove or recessl may also have small sinkings.

The rubber may be of two degrees of hardness, giving a relatively resilient upper surface or tread, and a relatively hard (unyielding) base to ensure t'lrm connection and keying to the block.

The invention will be further described in reference vto the accompanying drawing, wherein:

Fig. l is a perspective view of part of a road surface constructed according to the invention, and showing the continuous lines of rubber and the alternate continuous lines7 of hard road material.

Fig. 2 is a perspective view of one of the paving blocks used in forming the road surface shown in Fig. l.

Fig. 3 is a like view of the same block but without the rubber strips.

Fig. fl is a longitudinal geometrical section on line mm of a like block to that shown in F 2.

Fig. 5 is an inverted plan view.

Fig. G is a side view, and

Fig. 7 an end view of one of the rubber strips separate from the block.

Fig. 8 is a longitudinal section of a part of a modilied torni of block.

Fig. 9 is a plan view, and

Fig. l0 an end view of another example of the improved paving blocks.

Fig. ll is a plan of the same block prior to being fitted with the rubber strips.

Fig. l2 is an end elevation of the upper parts of two blocks laid side by side.

Fig. 13 is a cross section of Fig. 2 on line .f/-r

Fig. 14 is a plan view of an alternative way of laying the blocks shown in Figs. 2 and 3.

plastic, or semi-plastic state, and preferably by the machine forming the subject of Letters Patent No. 1,629,660 dated 24th May 1927. In the case of metal blocks, the recesses will be formed in the casting or moulding of the metal.

Although preferring circular and segmental recesses in the floor of each groove for anchoring the rubber to the block, it will be under-stood that other forms of dovetail or undercut recesses may be employed, although these will usually only be used when the block is moulded on to the already-formed rubber strips.

At cross roads, the blocks may have grooves running at right angles to one another` see Fig. 16, and at other than cro-ss roads such as right angled, or curved bends, the blocks and grooves may be curved, in order that the rubber strips may follow the line of traffic at such bends. Y

If desired, there may be more than two grooves and rubber strips in each block, the number depending on the width and spacing of the rubber lines and/or size block. Fig.

l2 shows the usual spacing and width of rubber and block material, but the width of the strips of rubber and of the alternate block material may be varied to suit the wheels of the vehicles mostly to be expected in any particular locality.

The floor of each groove c may be flat (horizontal), or it may be convex or concave longitudinally, or corrugated transversely, in order to further help in resisting the endwise disturbance of the rubber. The tread surface of the block and of the rubber (or both) may be flat and smooth, or they may be ribbed or studded, or have a pattern to increase the nonslip properties.

With a roadway paved with the improved blocks, and with the rubber strips arranged in continuous lines a kroad surface is produced in which continuous lines of rubber and alternate continuous lines7 of hard block material are provided with which the wheels of vehicles can each simultaneously and continuously engage and thus benefit by the properties of both. With the rubber anchored to the blocks toresist movement in all directions, the lines of rubber have no tendency to creep or become dislodged when heavy traffic is passing over them. And with the rubber of hard wearing quality, it serves toprotect the block material (say terra cotta or concrete) from excessive wear, and by its resistance the rubber will usually take the bulk of the load, and will tend to equalize the wear of the two materials, whilst always giving a practically noiseless and non-skid surface.

In addition to affording a combination of different wearing and supporting surfaces, the improved block, as compared with a block of like size with its top surface Wholly covered by rubber, effects a considerable saving in cost.

l/'Vhat I claim is:

l. A roadway 0r the like for vehicular traffic, the surface of which is composed partly of hard road material and partly of rubber, the rubber being embedded and anchored against relative movement in all direction-s, in the hard road material, the hard road material having undercut grooves extending longitudinally of the roadway and parallel to one another, and said grooves in their bottom faces having undercut recesses for the reception ofthe rubber, which completely fills the grooves and recesses, the hard road material and the rubber forming alternate parallel strips of hard and elastic material which extends over substantially the whole area of the roadway and present an elastic, non-skid and noiseless surface in strip form, inter-mixed with a surface of hard road material in strip form` the width of the strips being such that vehicle wheels not less than three inches wide will always run partly on the rubber and partly on the hard road material, as set forth.

2. A roadway orthe like for vehicular traffic, the surface of which is composedof paving blocks of hard wearing, heat-resisting yet mouldable material, and strips of rubber lying in undercut open-ended grooves in the upper faces of said blocks, each groove having undercut recesses in its bottom face and the rubber completely filling the grooves and recesses so that it is anchored relatively to each block in all directions, the blocks being laid side by side and collectively producing a road surface composed of alternate longitudinal strips of rubber and block material, which extends over substantially the whole area of the roadway and presents a combined elastic, non-skid and noiseless surface in strip form, intermixed with a surface of hard block material in strip form, the width of the strips being such that vehicle wheels not less than three inches wide will always run partly on the rubber and partly on the hard block material, as set forth.

3. A roadway or the like for vehicular traffic, the surface of which is composed of paving blocks of hard wearing, heat-resisting yet mouldable material, and strips of rubber lying in undercut open-ended grooves in the upper faces of said blocks, each groove having undercut recesses in its bottom face and the rubber completely filling the grooves and recesses so that it is anchored relatively to each block in all directions, the blocks being laid side by side and collectively producing a road surface composed of alternate longitudinal strips of rubber and block material, which extends over substantially the whole area of the roadway and presents a combined elastic non-skid and noiseless surface in strip form,

intern'iix'ed with a surface of hard block niaterial in strip i'erin, as set forth. c y

4. Paving blocks ior roadways andthe like y as claimed inv claim 2, wherein each groove has at each end in its bottoni face an undercut recess which is more than half a circle and less than a full crcle in pla-n and opens on to the adj acent end face or' the block, and each groove also having a vfurther undercut recess in its bottoni face at a poiiitinterniediate of the ends ot the groove, which further recess is circular in plan, as set forth.

5.' ljaving blocks composed of a hard wearing, heat-resistingfyet inouldable material having,` inlaid rubber strips in their top faces anchored in all directions, assembled in staggered relationship one to another to forni a roadway, and to provide parallel and narrow trips ef block material, and alternate pui allel and na-rroa7 strips of rubber, the strips running` longitudinally of the roadway and lying at distances apart which divide the road surface into a multiplicity of non-skid. and noiseless lines, alternating with similar gf, lines of' block material, as set forth.

6. Paving blocks as claimed in claim 5, wherein the rubber strips are located in openended grooves'having vertical. `faces and vertical notches in said faces, and wherein each no groove has undercut recesses in its bottoni face, which are engagedv by like projections on the underiiaces ofthe rubber strips, the recesses, grooves and notches preventing movenient of the rubber relatively to the bloclr in 3;, all directions, as set forth. v

In testimony whereof l have signed my name to this specilication.

Lucien eAisMAN.

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