US1206751A

US1206751A - Process of and apparatus for making roads.

Info

Publication number: US1206751A
Application number: US4784215A
Authority: US
Inventors: James D Clarkson
Original assignee: Individual
Current assignee: Individual
Priority date: 1915-08-28
Filing date: 1915-08-28
Publication date: 1916-11-28
Anticipated expiration: 1933-11-28

Description

J. D. CLARKSON. PROCESS OF AND APPARATUS FOR MAKING ROADS.

APPLICATION F|LED AUG. 28, 1915.

Patented Nov. '28, 1916. zfl -SHEETI.

J. 0. CLARK'SO N. PROCESS OF AND APPARATUS FOR MAKING ROADS.

APPLICATION FILED AUG.28. 1915.

H QUE O/wM V NE du m H 6 t nu D1 47/ mix I @Hio: new

JAMES D. CLARKSON, OFCARTHAGE, MISSOURI.

7 '0 (Ill whom it may (071((4'1'711 Be it known that I, JAMES D. CLARnsoN, a citizen of the United States, residing at tlarthage, in the county of Jasperand State of Missouri, have invented certain new and useful Improvementsin Process of and Apowing: is a specification.

paratus for Making Roads, offivhich the fol- 'My invention relates to an apparatus for and a. novel method of, constructing road surfaces from crushed rock.

j The"invention contemplates and has reference to the production of the wearing surface of 'a. roadway, the body of wh ch is composed of a sheet or layer "ofconsiderable 20. lander or filler. and which layer or sheet,

thus filled, is compacted asby a heavy roller, and has "applied to it a thin coating of fine broken stone which. upon being rolled or compacted, unites with the body of coarser material. to which it is applied and becomes a smooth, and largely impervious, cover therefor. It is to produce in aneco- *nomical, rapid, and satisfactory manner a roadway of this kind that my invention has been made.

In the accompanying drawings; Figure 1 is a sideelevation of apparatus,embodying iny invention and by which. it may be carried out. Fig. 2 is a front view of the ap- )a-1'ati1s showing particularly the screening and distributing devices.

In the accompanying drawing, A designates a tractor which may be of any usual or preferred construction. It prefe ably has broad traction wheels (0 and other features of a machine of thisliind, which need not be herein described. QThe longitudinal sills. of V the apparatus extend from under the tractor a considerable distance in front thereof and are, arranged to support a rock crusherB; which may be of any suitable or preferred type, a. screen or separator C for the products of .the rock crusher; and stm'ageflbins or receivers for the material separated by the screen. The front steering wheels?) su,(- :h as the tractor is ordinarily providealim h, are suitably supported at the forward ends of thelsill pieces The axle or swiveled support for these wheels is comiected with the steering mechanism 0 by links or cables 3 or other suitable con PROCESS OF'AlilD APPARATUS FOR MAKING ROADS. l

Specification of Letters Patent. Patent d N v. 28, 1916. Application filed August 28, 1 915. Seria1No.47 ,842.

the attendant and driver will usually be stationed, The rock crusher is driven from the fly wheel (.Z of the tractor. a belt l uniting such wheel with a pulley 5 upon the main driven shaft .6 of the rock crusher. l The product of the stone crusher B drops into a. receiver 7 from which it is taken by aconveyer 9 to the screen or separator C, where it isseparated 'intoy jreferably, two grades,'co arse material suitable, for the foundation and main bodyof'the road bed,.

.and fine material adaptdto serve as a top dressinga nd"coating therefor. The separator Cmay be of any SllltilblBOl' preferred kind. I have" represented it as consisting ofa rotary screen 10 in which is arranged a screw oraworm conveyer 11 adapted to 'positivelyfforce the. material delivered to the screen throughlfit lengtl'iwise, regardless of the grade or incline on which the apparatus may be working. The screenis driven from theengine of the tractor. ,lVhile I havenotfillustrated the driving gearin detail, I have indicated. thatthe lower shaft 8 of the conyeyer 9 is belted to the shaft 6 of the rock crusher, and also to a shaft 12 at the'head end of the conveyer, which shaft, through gearing 1.3, drives the? separator.

The coarse n iater-ial that does not pass. through the screen isforced out through the delivery 'end thereof and received upon a chute or conveyer '14 that delivers to a receiving and collecting receptacle 15. This receptacle is supported in suitable framework carried bythe supporting and steering wheels band the sill pieces2 of the frame--- work.'. Itterminates in a delivery spout 17 extending transversely across the track of the apparatus. This spout is preferably relatively narrow, considered on lines fore and aft of the apparatus, but is of a'width cor-- responding with-the width of the sheet of rockmaterialtha't is to be delivered by the ED ST T S PATENT OFFICE. j

machine at one time. This latter dimension prevent'an undesirably free deliveryof the material from the receptacle 15., The rear i edge does' not extend quiteso low as the.

to .the surface of the ground and-serves to,

front edge and determines the thickness of the layer of rock delivered.besides operating as a leveling device for the upper surface thereof. It is preferably adjustable. by means of a rack and pinion, l6, permitting a greater or less thickness of rock to be delivered as may be desired.

The spout-section 17 of the receiving and collecting receptacle 15 isprefcrably easily removable, being united with the main portion of the receptacle by bolts 20. The spout will usually be removed when the apparatus is not in use, es .cially when it is moving from place to p ace, in order to prevent it from being broken by engagement with objects projecting from the surfaceof the ground. i I

The fine material that passes through the screen is collected by a casing or jacket 21 that preferably completely surrounds the screen circumferentially, and is .formed with'an inclined bottom 22 leading to a spout 23 that is located laterally to one side of the apparatus so as to discharge outside of the roadway being produced, that is, be-

- yond the side edge of the crushed rock layer being delivered by the spout 17. The outer end 24 of this spout is preferably vertically disposed and is adapted to have applied to it a telescopic extension 25, the delivery end of which is ,close to the surface of the ground. The section 25 is preferably supported by wheels 26, so that/it is free to move upward and downward and thus follow the surface of thcground over which it passes. Its rear wall is preferably vertically adjustable so that the flow of material may be regulated, there being adjusting devices 28 provided for regulating and setting this spout at will.

in using an apparatus such as described for building a roadway, it is taken to the place of beginning the desired improvement. when the engine of the tractor is started. being disconnected from the traction wheels (1, but in driving connection with the rock crusher. Suflicient rock is then crushed to fill the

receptacles

15 and 23, whereupon the engine is connected with the traction wheels and the apparatus slowly moved over the roadway. The. separator C and the adjacent parts are the, advance elements of the apparatus. so that the layer of coarse crushed rock. I). that is laid upon the prepared earth surface is rolled and compacted by the tractor which immediately follows. As will be: seen. the delivery spouts 17 and 25 are open-ended. and are supported so that their ends are quite, close to the surface of the ground. in order" that. though the hoppers or receptacles with which they communicate may be filled. material does' not flow out therefrom to any considerable extent except as the machlne is advanced, when the former produces the sheet or layer one side of the layer I) on the roadway. and the latlcr delivers the line material I; alongside the l'(ulll\ ':l and in position to be conveniently applied to the surface of the roadway al'lcr (lulaycr I) has been filled and compacted.

lt will be seen by reference to Fig. 2 lhal the open end of the spout 1T inclines downwardly each way from its center. this for mation being; adopted inordcr to give a desired crown to the roadway being produced. If the crusher does not produce broken stone rapidly enough lo properly supply the spout 17 as it is being advanced by the. tractor. as will he the case unless the apparatus is propelled much more slowly than the ordinary speed of a traction cnine. the latter is stopped when the supply rom the lbceptaclc 15 is exhausted or nearly so. and remains at rest until the hopper is again filled. when the apparatus 86 is advanced another stage.

It will be seen that the apparatus which I have invented and which is herein described, will operate positively on any grade; and that a road bed with a rock body of' any desired thickness may be produced thereby.v regardless of the character of rock being: en1ploycd.-some kinds of which are reduced more rapidly than others by the crusher as is well known.-by reason of the interposition of the storage receptacle 15, where a supply of crushed rock may be accumulated while the apparatus a n whole is standing still and from which the rock is delivered to the roadwav and spread in a uniform sheet thereon as soon asthe apparatus is advanced.

Vhat I claim is:-

1.. A road building apparatus comprising mechanism for crushing rock. means for I" separating the crushed rock into relatively .coarse and fine material. means for deliveringthe coarse'material in a substantially uniform sheet on the road surface as the apparatus is caused totmverse the roudway, and means for delivering the separated fine material laterally to one side of the sald sheet of coarse material and in position to be conveniently applied thereto subsequently. Ill 2. A rpnd building apparatus comprising in combination a tractor for rollingand compacting the road surface. a rock crusher,

a screen for the product of the rock crusher. means for driving the rock crusher and the screen from the engine of the tractor. a receptacle in which the course material from the screen is accumulated. meansfor delivernig the material from the said receptacle and spreading it in a layer as the apparatus is advanced. and means for delivering the fine material from the screen laterally at of coarse material in a. position to be conveniently applied to the surface of the latter by hand, the said parts ranged to spread the being: connected so as to be'propelledas "a unitary apparatus by the tractor.

3: A road building a ppa 'atus comprising in combination a tractor, a rock crusher; a screen for the product of therock crusher, means for driving the rock crusher screen from the engine otthe tractor, a rematerial from the screen is acciunulatul, and a spout through, which the material from the said receptacle is delivered to the roadway armaterial m a umtorm' la \'er, the spout. being: adjustable toward and from the surface of the ground. the said parts beingconnected so as to be propelled as a unitary apparatus by the tractor.

4:. A road building appayatus comprising, in combination a tractor a 'rock crusher, a screen for the product or the rock crusher. means for driving the rock crusher and the screen from the engine of the tractor, means .for taking the coarse-material from the screen and delivering it in a layer upon the road surface. and means extending laterally to one side of the apparatus and arranged to receive the fine material from the screen and deliver it laterally beyond the layer of coarse material. the said parts being connected so as to be propelled .as a unitary apparatus by the tractor.

A road building apparatus comprising in combination a tractor, a rock crusher, a

means for .elriving the rock crusher and the and receiving;-

, screen for the product of the rock and the screen from the engineot' the tractor, a receptacle in Which the coarse material from the screen is accumulated, means for delivering the material from the said receptacle and spreading it in a layer as the apparatus is advanced, a jacket surrounding the screen the fine material therefrom, and a laterally disposed delivery spout for discharging the said fine material atone side of the layer of coarse material, the said partsbeing connected so as to be propelled as a unitary apparatus by the tractor.

6. k road buildiii'i apparatus comprising in combination a rock crusher, a rotary screen for the product of the rock crusher in which is arranged a screw conveyer for positively forcing the material through the screen regardless ot' the grade on which the apparatus may be operating, means for driving: the rock crusher and the-screen from the engine of'the tra'ctor, receptacles in which the coarse material and the fine material, separated from each other by the screen, are respectively stored, and means for delivering the coarse material from its storage recap tacle over the road surface being produced, and means for delivering the fine material from its storage'receptacle to one sid'e of the roadway. v

" JAMESD. CLARKS ON.

crusher,