USRE2145E - Improvement in stone-breakers - Google Patents

Description

-'UNITED STATES PATENT OFFICE.

' L W. BLAKE, OF NEW' HAVEN, CONNECTICUT.

IMPROVEMENTiN STONE-BREAKERS Speenic'atlon lbrn'ing part'ot Letters Patent had No. 20,542, dated June 15, 1858: Reissue No. 2,145, dated January 9, ieee.

lTo @ZZ whom, t may concern.-

Beit known that I, ELI W. BLAKE,of New i Haven, lin the county of New Haven and State of Connecticut, have invented anew and useful machine for breaking stones for road,

metal, and other purposes,-which machine I call a.Stone-Breaker 5 and I do hereby declare `that the following is a full, clear, and exact descriptio'n of the construction and operation of the same, reference ,being had to the annexed vdrawings, making part oft-his specification.

My stone-breaker, so far as respects its principle or its essential characteristics, consists of two jaws, between which the stones,l are-to be broken, having their acting faces so nearly in an 'upright position that stones will descend by their own gravity between them, aud'convergent downward one toward the 'oth'ee-in snob-manner that-whilc--t-hc space between them at the top'is such as to receive the'stoiies that are to be brokemthat at the` .bottom isonly suiicient to' allow the fragments 'to pass when""broken to the required size;

and of arevolving shaft, driven by steam or other power, which is madeto impart to one of these jaws a continual vibratory movement,

causing -it to alternately advance toward and recede from' the other jaw through ashort and definitely Vlimited space. Hence when the shaft isfrevolve'd and a stone is dropped linto the space between the jaws, it falls down until its further descent -is arrested between their conyergent faces. The movable jaw, advancing, crushes it; then, receding, liberates 4 the fragments, and they again, descend, and if too large are again arrestedjand crushedand so von untilall the fragments having been sufiiciently reduced have passed ont through thel narrow space l.at the bottom.

Inorder that the'machine may be adjusted to produce fragments of anygdesiredA size, I

make provision Afor varying' the 'distancebc- 1 teenthe j'aws at the bottom at pleasure, and

astheresistanceto the motion of the' jaw and shaftis very great when the jaw is advancing,

and .'little or nothing during its receding movement, have combined with the movable jawjandshaft a iiy-wheel, for the purpose of rendering `the strain upon the driving-power more equable.

The details of the structure of the machinesuch as the manner of supporting the jaws parting the definite motion v'withthe required power tothe movable jaw from the revolving shaft-may he varied indefinitely .without affecting its principle of operation. I proceed to give arfull description of all the parts ofthe machine as I have constructedit.

The machine maybe made oi'any size, varying according to the size of'thestones it is -to be capable of receiving and the amount of work.

chine,.s hoWn as resting on two timbers, to 4which it is secured bybolts. .In this figure ,most ofthe parts of the machine are partially f'concealed from view by the main frame or casting, which supports all the other parts. Fig.2 is an Orthographie view of all the parts' in place, as they would appear upon removing one side of the main frame. Figs. 3, 4, 56, 7 aretransverse sections Zoi" the machine at the several. points 'indicated on Fig. Y2.' I In -Figf2 the parts of 'the drawings which .are shaded by diagonal lines are sections of those parts .of the main frame or castingwhich run transversely from one Y' side to the other, connecting the two sides together, and which are supposed to .be cut asunder in order to'remove one side. f j .i A is the stationary` jaw. This is placed against one end of the frame, to which it is secured at the bottom'by a bolt and at the top by' lateral projections, which t into corre- .sponding recesses or notches in the top of the frame, as shown in Fig. 1, and in section, Fig. 3. By sucha construction, making this jaw separate from the frame it can bei removed when worn, and a new one readily substituted in its place.

B is the movable jaw. This piece extends downward to and enters a mortise in the lower in their proper relative position, and of im- Figure 1 is a: perspective view of the mal' transverse part of the main casting, by which means its lower end is prevented from moving in either direction .hoiizontallv To give it a vertical support it is provided with shoulders,

ters the mortise, are slightly rounded, as shown in Fig. 2, so as to allow the upper endV to v brate.

m n is the space .between the acting' faces of the' jaws, into which the stones are introduced. This space is suiciently wideat m` to receive the largest pieces of stone' which the machine is designed to break, and thence converges downward to a width at n which is only sntlcient to allow-the fragments to pass when breken to the required size.

The acting-faces ci thejaws are not plane 'Y surfaces, but are corrugated, the corruga'tions running vertically', so that,a section of the opening n by a horizontal plane would present the outlines shown in Fig. 8. These corrngations serve to diminish the strain to whichlarge pieces of stone would otherwise subject the machine, and also to prevent their fragments of large breadth .from passing through the opening n." l

The two pieces C and D, with the intervention of the piece F, constitute an elbow-joint,

t) and l), articulating on F at their adjacent ends and at their outer ends, one ofl them on E ihc cross-bar E ot' the main frame, and the o1 her on the back of the movable jaw.

The piece F at its lower end articulatcs on the lever G; This lever rests at one end on the t'ulcrnxn H, which forms a part of the inain casting, and the other end is connected by the connectinglrod or piece I with the crank K ot' the shaft L. 0n one end of the shaft L is placed a tl y-wheel, P, four feet indiameter, weighing seven hundred and t'ty pounds, and on the other end a pulley Luot shown in the drawings) to receive-the belt which drives the machine. The spiral spring M,through the medium of the rod N, tends to hold the movable jaw bach, thus keeping the pieces C and D in contact with their bearings and securing the retnrnmotion of the Jaw.

It is obvious that the revolution of the crank will vibrate the lever, and that this, through the medium ofthe pieces F, C, and D, will give a shortgand definitely-limited vibra 'tion to the movable jaw B. The entire operation of the machine will be understood without further explanation.

In order that the pieces C and' D,|wl1en raised to' their highest' Q1evation,"may not bel retained there bythel friction of. their bear? ings, they shonld,"when,thus'elevated, deviate from aline with veach other by an angle of not less than vedegrces; and in order that stones may not be eiected from the jaws lwithout being crushed, the angle of 'convergence of their acting faces should not exceed eighteen degrees. l,

inv order that I 'mayvary the size of the `openingmsti as to adjust the machine to producefi'rgments Y of' any desired size, I" provide several pieces 0, diferin g' sli ghtlyv in length.`

Theny by' substituting@ longer or shorter .one the size of the opening may be diminished or increased at pleasure. By the the opening maybe restored to the proper size when enlarged by wear. To prevent the rapid wearing of the jaws, they should be made of hard iron and be well chilled, and to prevent the wearing away of' the inside of theframe adjacent to the space where the stones are crushed, I contemplate casting the frame in such form asto receive these chilled pieces, which may be replaced When-worn. I also contemplate making the movable jaw-piece in such form as to receive a separate piece of chilled iron for its acting face.

I also contemplate combining with the machine a revolving screen to ,remove the fragments as they fall from it and separate them chine, of the upright convergent jaws with a revolving shaft and mechanism for imparting a definite reciprocating movementto one of the jaws from the revolving shaft, thewhele being and operating substantially as set forth.

2. The combination, in a stone-breaking machine, ofthe upright movable jaw with the revolving shaft and y-wh'eel, the whole being and operating` substantially as set forth.

3. In combination with the uprightconverging jaws and the revolving shaft imparting a denitely limited vibration to the movable jaw, so arranging the jaws that they'can be set at di'erent'distances from each ether at the bottom, so as to prodncefra-gments of any desired size.-

ELI W. BLAKE.

Witnesses: y

W. R. BONALDS, M. N. HU'rcHiNsoN.

same means

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