US1733610A

US1733610A - Nonmetallic paving block and method of manufacturing the same

Info

Publication number: US1733610A
Application number: US148629A
Authority: US
Inventors: August H Leipert
Original assignee: RUBBER SHOCK INSULATOR CORP
Current assignee: RUBBER SHOCK INSULATOR Corp
Priority date: 1926-11-16
Filing date: 1926-11-16
Publication date: 1929-10-29
Anticipated expiration: 1946-10-29

Description

Oct. 29, 1929. LElPERT 1,733,610

NONMETALLIC PAVING BLOCK AND METHOD OF MANUFACTURING THE SAME Filed Nov. 16, 1926 2 Sheets-Sheet l H mm INVVENTOI? Azw'uptfl. Lci vcrt WQWIUBZWWW 477 HNEYS Oct. 29,1929. A. H. LEIPERT 1,733,610

NONMETALLIC PAVING BLOCK AND METHOD OF MANUFACTURING THE SAME Filed Nov. 16, 1926 2 Sheets-Sheet 2 INVENTOR Auaust H La ipert Br I w a un 'su w m ,4 omrs Patented Oct. 29, 1929 UNITED STATES PATENT OFFICE" AUGUST 11. Lemar, or COLLEGE romr,

NEW YORK; N, Y., ASSIGNOR, BY MESNE ASSIGNMENTS TO THE RUBBER SHOCK INSU'LATOR CORPORATION, OF WILMING- TON, DELAWARE, A. CORPORATION OF DELAWARE NONMETALLIC PAVING BLOCKAND METHOD OF MANUFACTURING THE SAIZE Application filed November 16, 1926. Serial No. 148,629. g

In co-pending United States applications .Ser. No. 722,648 filed June 27, 1924, now Patent No; 1,640,460 and Ser. No. 726,441 filed July 17, 1924, now Patent No.- 1,643,024, issued jointly to A. F. Masury and. A. H. 'Leipert, there areshown, described and claimed non-metallic paving blocks of which a roadway may be comprised and methods of laying the blocks.- It is there proposed to retain the yielding non-metallic material,

such as rubber, of which the blocks are composed under compression, wherebytheir strength, resiliency and wearing qualities are materially improved. These blocks when placed under compression and laid to form the surface of a roadway afiord a degree of nonrigidity, whereby shocks may be cushioned and noise deadened during the pets sage of vehicles thereover. Roadways having a surface made up of blocks of such material havebeen found to show practically no perceptible wear in even the most trying conditions of usage over long periods of time.

The present invention is concerned pri marily with a non-metallic paving block somewhat similar in general to the block shown and described 11113116 second abovenamed application and method of manufacturing thesa'me. The improved blocl: difl'ers principally in the means for retainmgmaterial of which the block is composed under compression. In accordance with the invention the block comprises a preferably seamless metallic ring orba'nd which encircles a block of yielding non-metallic material substantially about its middle portion vthereby maintaining it under compression, the ends being free and bulging slightly so that when laid to form a roadway the surface thereof will be wholly non-metallic.

- The improved method consists essentially in introducing a mass of yielding non-metallic material into a seamless metallic band under the application of external forces, whereby the non-metallic material confined within the band is maintained under a degree of internal static pressure depending upon the relative dimensions of the mass of nonmetallic material and the band.

In practicing the method the band is placed be left open 1 being forced therethrough.

upon a fixture which supports it upon two ledges in such a manner that the bottom may and the rubber block forced therethrough. Over the top of the band is placed a funnel-shaped fixture designed for the purpose of, initially contracting the block.

The block of non-metallic material, the out-' side dimensions of which are greater than the inner dimensions of the band is placed within the funnel-shaped fixture and forced. through the ring by any convenient means, such as a power press. The funnel-shaped fixture serves the purpose of initially contracting the block to the inner'dimensions of the band thereby facilitating its passage therethrough. When thefunnel-shaped' fixture is removed the band remains about the middle portion of the block thereby maintaining it under compression.

In order that the invention may be better understood, it will now be described more fully in connection with the appended drawings in which:

Figure 1 is a view in perspective of a block of non-metallic material suitable for use as a paving block'before being placed under compression. 1

Figure 2 is a view in perspective of a band adapted to be placed about the middle portion of the block to maintain it under compres;

Fi the band in place on a it against displacement while gure 3 is a view in perspective showing fixture adapted to hold the block is Figure 4 is a view 1n perspective of the funnel which is adapted to be placed above the band to facilitate forcing the block therethrough. v

Figure 5 is a view showing the band and funnel in place upon the fixture with a block of non-metallic material being forced therethrough by means of a power press, part of the funnel being broken away in the interest of ,clearness.

Figure 6 is a view in perspective of the block with the band in place thereon and maintaining it under compression.

Figure 7 is a view in vertical section of the fixture, band and funnelnvith a block of nontion'of the block as shownin' Figure 6. The

' of which may be beveled as at a", which it is proposed to confine under compression within a preferably seamless ring or band I) designed to be placed about the middle porinner dimensions of the band I), as from b to b and I) to b, are le s than the outer dimensions of the block, a a to a and a to a,

so that when the band is placed about the block the yielding non-metallic material will be pla'ced'under a degree of compression and internalstatic pressure depending upon the .relative dimensions of the band and-the block.

. An apparatus adapted to force the yielding non-metallic aterial into the band is shown in Fi re 5. he band 6 rests-upon shoulders carried" with the fixture (Z and over the bandis'placed a funnel-shaped fixture c. The fixture-d may be formed, as shown in Figure 3, of two angle pieces having horizontal and vertical sides d, 1, respectively, and held togetherin fixed relation by a piece of metal (Z welded or otherwise afiixed thereto. Upon the adjacent vertical sides d are aflixed shoulders (1 having formed thereon ledges d adapted to hold the band. On the outer edges of the vertical sides d there may be formed ears or brackets d having bolt holesformed therein for a purpose which will become apparenthereinafter.

The funnel-shaped fixture (Figure 4) may be formedofa single piece of metal having opposite sides converging as indicated at c, c from the largest portion at the top 0 to the smallest portion 6' at the bottom. The small'bottom portion? may be formed of sides whose elements are mutuall perpendicular from 0' to the bottom e ge of thefunnel andis so dimensioned that the inner bottom edges of the funnel coincide with the inner side of the band b'when the'funnelshaped fixtureic is placed thereupon. The funnel-shaped fixture may have formed thereon ears or brackets 0 having bolt holes 0.

In forcing band the band is placed upon the ledges d on the shoulders d? carried with the fixture d.

The funnel is then placed over the band in such relative position that the inner bottom edges of the funnel coincide with the inner edges of the band. As shown in Figure 5 the/bl ck of non-metallic material is then placed within the funnel and over it is'varranged a ram fof wood or other suitable material which is adapted to force the block downwardly and through the band by means of a power press indicated in part at e and adapted to be operated by rollers as shown at e. It will be observed that in being forced into the band the block of non-metallic Y material is contracted to the inner dimensions ofthe band-while-within the funnel as'at a thereby facilitating its. passage through the band. 1

Figure 7. is a view in vertical section showing a slight modification in the construction of the bottom portion of the funnel. It will be seen that the bottom portion may be machined out as indicated at 0 so as to fit about the band and assist in maintaining the proper relative position between the funnel and the band while the non-metallic fmateriaLis being forced therethrough.' The proper relationship of parts may be also insured by clamping together the brackets c on the funnel and brackets d on the fixture as'by bolts hpassing through the bolt holes 0 and d, respectively. The completed paving block is shown in Figure 6 with the band in place about its middle .portion. The ends of the non-metallic material may project beyond the edges of theband and bulge out as indicated at a the material confined by the band being under a greater degree of compressionthan that pro-- mensions of the band. It-will be apparent, however, that the means for introducing the mass of yielding non-metallic material into the band may take other forms than that shown in the preferred embodiment and no limitations areintended except as indicated in the appended claims. It will also be obvious that the band I) may be formed with circumferential corrugations or other means to reinforce it against the pressure set up by the compression of the yielding non-metallic materia. the nonmetallic block into the It will thus be seen that there has been provided a paving block of yieldin non-metallic materia which is maintaine under compression by a seamless metallic band and which presents a neat appearance havin no projections or other lncumbrances w ich might cause difliculty in laying the blocks side by side in paving a roadway. The process of manufacture is simple and inexpensive and aflt'ords means of producing such paving blocks in quantities notheretofore possible.

It will be seen that thepaving block presents. a wholly non-metallic surface to the roadway thereby cushioning shocks and deadening noises due to the passage of vehicles thereover. Since it is maintained under compres sion its resiliency and wearing qualities are such as will allow its continued use without replacement over a practically indefinite length of time.

What is claimed is: In the manufacture of paving blocks, the method of inserting a block of yielding material into and against a relatively rigid metallic retaining band which is somewhat smaller than the normal perimeter of the block, comprisin firmly supporting the band, compressing at east a part of the block in suitable means aligned with the band until one end of the block has a perimeter equal to the interior perimeter of the band, positioning the means and block so that the block is aligned with the band, the compressedend of the block being next to the band, and forcing the block from said means directly into' the band until it protrudes from both ends thereof, the block havingno chance to expand before coming within the band, and the said means remaining always entirely without the band though abutting against it.

This specification signed this 13th day of November A. D. 1926. so AUGUST H. LEIPERT.