US920807A - Paving-block. - Google Patents

Description

E. ALCOT'I'.

- PAVING BLOCK.

APPLICATION 11.51) JUNE 26, 1908.

Patented May 4, 1909.

lmnntoz EDWARD A LGCT T, OF PIITSBURG, PENNSYLVANIA.

PAVING-BLOCK.

Specification of Letters Patent.

- Patented May 4., 1909.

' Applicationfiled June 26, 1908. Serial No. MOAM.

To all whom it'may concern:

Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Paving- Blocks, of which the following is a specification.

' This invention relates to wood pavements of the class which. is made up of individual blocks, each of which is com osed ofa'plurality of sections of hard woo held in a rigid relative position to present a most effective wearing surface.

With the above and other objects in view the invention contemplates the employment.

of sawed sections of hard wood, preferably white oak, owing to its wear-resisting qualities and special adaptability for this purpose, said sections being held in a ri id relative position by means ,of suitable binders, and the several sections presenting their ends for tions.

the wearing surface, and having differently running grain, thfatis, the grain of the wood in some sections runs 1n a different direction frornthat in the other sections, and all of the sections are so arranged as to havethe differ.

ently running grain-in opposition, thus mate-5'- rially strengthening the block bodythroughout and providing a wearing surface of great resisting andwearin r qualities.

In carrying out t e invention it will be understood that changes in details and structural arrangement may be resorted to, but certain preferred and practical examplesfare' shown in the accompanying drawings, where- Figure 1 is a perspective View of a form of the improved sectional block, the sections thereof being held in rigid relative osition by means of side binders extending ongitudinally of the block. Fig. 2 is a plan view showing a preferred arrangement of the sec- Fi 3 is a horizontal sectional view showing t e sections held in rigid relative position by means of transverse binders.

Like characters of reference designate eorresponding parts.

In the accompanying drawings, and referring for pur oses of example first to the forms of the look shown in- Fig. 2', the pav-' ing block in its entirety has been designated by the numeral 10, and the samepreferably consists of a plurality of sawedwhite oak sections, the end sections -11-11 being preferably of slighter thickness than the: adjoining I sections 12-12, which abut against thetwoit known ..tl1at I, EDWARD ALooT'r, a citizen of the Lnrted States, residing at part or double sections 13.-1.3 which are of the same thickness as the end sections11-1 1 said two-part sections 1313being spaced apart by a central section 14. While the described arrangement .of sections is onethat'has been found to possess great practical advantages, it will of course be under stood that the invention is not in any way limited thereto, as various other arrangements may be resorted to, the object being toprovide a compact structure in which each section is held in a' vertical position to present its smaller end grain-edgewisa to receive the wear incident to heavy traiiic.

The sections may be held in the desired position to form the complete block in various ways, examples of which have been shown in the accompanying drawings. For instance, in'Fig. 1 the sidesof the sections have been shown. provided with. saw cuts 15'15", which aline with each other to form -continuous grooves 16-1'7 into which n1etallic binders 18.19 are driven to retain each section in a rigid relative position.

In Figs. 2 and 3 the inside meeting faces of each section have been shown provided with a continuous transverse saw-cut 20, which, when the said sections are in position form looking recesses 21 into which binders .22 are driven, the arrangen'ient being such that each section has an independent locking engagement with the ad oining sectlon.

As has .beenbefore stated, the sections 9Ov forming thepaving block are preferably of white oak on account of its well known hardness, and the same are of such a size that they may be readily sawed from 'the waste pieces from saw mills. Such pieces, after being treated as will be described later on,

have their-grains running in different directions, and it is contemplated using these difierently grained pieces to present a wear-' ing surface of the block which presents opposing grains. An iiample of such arrangement is shown in Fig. 2 of the accompanying drawings,and by reference to said figure it will be 0 served that the grain of the and sections 11-] 1 runs longitudinally, the grain of the adjoining sections 1 2-12'ru.ns transversely, the grain of the two pairs of sections 13--13 runs longitudinally, and the grain of the central sectionli runs transversely. B this arrangement it will be seen that t e crushing or spreading strain on the wearingsurface of the blockmcident on all of said sections which prevents the formation of any ridges and the like such as are formed on surfaces when the grains all run in the same direction.

Irrespective of whether the block sections aresawed from waste pieces of material or not, a necessary and important feature of the invention is that the sections are specially prepared in order to provide a plurality of sections in the same block which have the grain running in ditlferent, directions, and which are capable of being so related when assembled as to have the differently running grains in opposition. For instance, one or more sections of the blockpresent the grain running transversely of the end of the block, and tins is produced by the ordinary cross grain sawing. That is also true of those sections of the block wherein the grain runs across the ends transversely but also more or less oblique. Again, other sections of the block, wherein the grain runs in a direction longitudinally of the end of the section, such sections are prepared by the operation of quarter sawing, or in other words sawing with the grain of the wood. \Hence, it will beobserved that the improved sectional block claimed could not be formed from ordinary sections, pieces, or slabs sawed out in the usual manner.

-l igs. 2 and 3. of the drawings exemplify the plan of having the sections with oppositely running or opposing grains arranged in regular alternating relation, while Figs. 1 and 3 suggest one of the variations which may be resorted to by utilizing a more promiscuous arrangement of the sections, while at the same time preserving the idea of having the differently running grains in opposition. And this may be v aricu within reasonable limits without departing from the scope of the invention.

A practical feature of the invention is enlb'odied in the structure at one or more places two-part sections, 13-13, is that the same increase the number of joints, thus making the wearing surface more even, and at the same time giving a better foothold for tra'll'ic. Furthermore, these two-part sec tions possess the distinctive advantage of contributing to the economical construction of the block from picccs that are ordinarily waste in saw mills.

As is the usual custom in wood pavements, the sp aces betweon'each section are filled. with tar, or the like, which compensates for all expansion and contraction due to atmospheric conditions.

Refcrring particularly to the arrangement of sections shown in Figs. '1 and 3, the reference numeral 25 designates one of the ter minal or end blocks havinga transversely running grain at the end, while 26 designates the other end block having the grain at the end running in a general longitudinal direction. Intermediate narrow sections or pieces 2727, 28 and 28, having the grain. running as shown in Figs. 1 and 3 are sandwiched in the body of the block with the end sections, and with two-part sections 3030, and 3131.

Claims 1. A paving block composed of a plurality of wood on sections having diilerently running grains presented on-cnd at the wearing, surface,said several block sections being also arranged to present their diil'erently running grains in opposition to check slipping and resist fracture and uneven wear by the trallic, and fastenings connecting adjoining bloch sections.

2. A paving blocl; composed of a plurality of wooden sections having dil'lerent] y running grains presented on cnd at the wearing surface and arranged to present their diil'ereutly running grains in opposition, said block sections being provided in their inside faces with transverse grooves, and interior transversely extending binders fitted in said grooves to fasten together the adjoining block sections.

In testimony whereof I hereunto allix my signature in the presence of two witnesses.

El) WARD- ALOOTT.

lilitnesscs:

it. C. BRADDooK, I D. P. WOLHAUPTER.

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