US2447303A

US2447303A - Crushing machine for rocks and the like

Info

Publication number: US2447303A
Application number: US517167A
Authority: US
Inventors: Einar H Anderson
Original assignee: Individual
Current assignee: Individual
Priority date: 1944-01-06
Filing date: 1944-01-06
Publication date: 1948-08-17
Anticipated expiration: 1965-08-17

Description

Aug 17, 1948- E. H. ANDERSON 2,447,303

\ CRUSHING MACHINE FOR ROCKS AND THE `LIKE Filed Jan. 6, 1944 4 Sheets-Sheet l cnusHINe MACHINE Foa` nocxs Aun frag LIKE Filed Jam e, 1944 l 4 Sheets-sheet 2 @md/MMM arraeys Aug. 17, 194s.`

Filed Jan. 6, 1944 E. H. ANDERSON CRUSHING MACHINE FOR ROCKS AND THE LIKE 4 Sheets-Sheet 3 iormeys Aug.' 17, 194s. E, H. ANDERSON 2,447,303

CRUSHING MACHINE FOR RoCKs- AND THE LIKE Filed Jan. e, 41944 v sheets-sheet 4 ing means for protrusively adjusting the pivot seat of the toggle plate to vary the clearance or jaw openings between the cooperating jaws;

Figure is an elevation of the receiving end of my crushing machine;

Figures 6 to 8 are diagrammatic side elevational views showing the relationships of the concave surface of the common reciprocating jaw member to the opposed crushing roll in maximum retracted or material-receiving position, completion of crushing stroke and material discharging positions respectively;

Figure 9 is a similar diagrammatic View showing the relationship between the concave crushsurface of a reciprocating jaw and the concave surface of the crushing roll when adjustment has been made for crushing material to a finer mesh; and

Figure 10 is a similar diagrammatic vew showing the relative positions of the concave crushing surface of the reciprocating jaw and its opposed portion of the crushing roll when adjustment has been made for producing a coarser processed maj terial with the machine working at high capacity; and

Figure 11 is a vertical section illustrating the simplified embodiment of my invention.

In the drawings a Crusher unit forming a part of a complete crushing and screening plant is illustrated, comprising a main frame H having heavy vertical side plates I0 which are suitably secured together and spaced apart and which have inwardly offset upper wall portions lb deiining the sides of an upper crushing chamber and further acting as a support for a heavy actuating shaft II. A heavy tie I2 connects and reinforces the upper wall portions IIlb at the material receiving end of the machine, having a jaw carrying surface inclined rearwardly slightly from the vertical and to which a stationary jaw plate I3 is detachably secured. The jaw plate I3, as shown, extends the entire distance between the two side plates Illb of the frame and may be provided with a multiplicity of flutings or ribs extending upwardly and downwardly of the jaw.

A rotary axle I4 is mounted transversely of the frame journaled in heavy bearings I5 secured to the outer surface of the lower side plates I0 and disposed some distance below the stationary jaw plate I3. Axle shaft I4 has aixed thereto a relatively large crushing roll I6 constructed of suitable hardened material. This crushing roll is disposed below the tiemember I2 and the jaw carried thereby in spaced relation thereto to permit material to be fed to the top of the crushing roll from the rear of the machine in a line of travel substantially tangential to the roll I6. As shown, a declined delivery screen or chute I1 is supported to the rear of and above roll I6 with its inner or delivery edge disposed slightly forward of the vertical diameter of the roll I6.

I provide a plurality of reciprocating, jawcarrying pitmans I8 cooperating with both the stationary jaw I3 and the crushing roll I6 to produce two stages or steps of crushing operations. For purposes of illustration a rock Crusher having only two of said reciprocating pitmans is illustrated in the drawings, although it will be understood that a greater number may be utilized to better balance the crushing operations and to provide for a more steady stream of crushing impulses against the stationary jaw I3 and crushing roll I6. Each of the jaw carrying pitmans I8 is journaled upon an actuating eccentric I9 fixed to or otherwise provided upon the horizontal tightening plates I0.

4 actuating shaft II, said shaft being journaled in heavy bearings attached to the upper and forward portions of the upper plates I0b of the frame. The two eccentrics I9 have their axes angularly spaced apart relatively to the axis of shaft II to cause successive crushing operations on the part of the respective pitmans I8.

The ends of actuating shaft II extend considerably beyond the side plates IIlb of the frame and have attached thereto large fly wheels 20, one of which may be driven by belt or otherwise from a suitable source of power. A horizontal transverse counter-shaft 2| traverses the lower portion of the frame below the actuating shaft II, extending through the widely spaced side plates IIl and as shown being journaled in suitable bearings 22 attached to the outer sides of side The bearings 22 are eccentrically mounted in the heavy collars 22a which are adjustablyv aiixed to side plates 29 to provide for `oscillatory adjustment of said collars with eccentric effects for positioning bearings 22 for chain purposes in the driving of the machine. Counter-shaft 2| is suitably driven from actuating shaft II and as shown a heavy roller chain 23 is trained about a driving sprocket IIa xed to one end of shaft II and about a relatively large driven sprocket 2Ia fixed to the corresponding end of counter-shaft 2 I.

The opposite end of counter-shaft 2I as shown has afxed thereto a driving sprocket 2lb for driving the crushing roll I6. The shaft I4 of the crushing roll is provided with a relatively large sprocket I4a axed to the projecting end thereof on the same side of the frame as driving sprocket 2 Ib and an endless roller chain 24 is trained about sprockets 2lb and |40, for driving the crushing roll at relatively high rate of speed.

The heavy pitmans I8 are for the most part of the conventional construction used in rock Crushers and have enlarged horizontal journals I8a at their upper ends which surround the respective eccentric cylinders I9 of the actuating shaft, suitable roller bearings and races being interposed between said parts for smoothly resisting wear. The pitmans IB are provided along their rear edges and adjacent their lower ends as shown with adjustable, double fulcrum seats 25, each of said seats having two spaced seating channels 25a adapted for reception of the forward edge of a toggle plate 2'I and each being interposed for limited vertical adjustment through the medium of one or more spacers or shims 26 between heavy seat attachment lugs 28, rigidly' secured to the pitmans. Each of the toggle plates 21 is of conventional structure, having a weakened central portion 21a extending throughout the length thereof and having its rear edge seated in an elongated pivot seat or groove 29 which is adjustably mounted in a tie frame 30 connected across the side plates I0 of the frame at the lower forward corner thereof. The construction of this seat and its adjustment mechanism is of special and improved construction and will be described later in detail. The lower end of each of the pitmans I8 is connected by a, spring tensioning link designated in its entirety by the numeral 3I with the transverse tie plate or frame 30, said spring link holding the fulcrum seats of the pitmans at all times against the forward edge of the toggle plate.

Each of the pitmans I8 has detachably secured to its inner longitudinal face a pair of

jaw members

33 and 34 opposed respectively to the upper stationary jaw I3, and to one side of the crush-l incirca Iii. The upperjaws-aaf of thetwo:piti'nans-` are-of" approximately ono-half thel width ofi stationaryjaw IS-'a-'ndare opposed thereto inside by side relati'on'shipas clearly show-nin Figure 2 and maybe-provided withlongitudinal iiutings or ribs-to match' thetlutings of the-stationary jaw I3.- By reference to Figures 2 and 5 it will be noted that the upper: crushingchamber defined between-.the upper plates- Ililb ofthe trameis-substanti'ally'A oil less width than the lower crushing chamber extending between. the lowermain plates [2U-of the' frame andthat-the -end's of crushing rol-i- 6A project outwardly for. considerable distances beyf'oildtheY outer longitudinali edges: oithe upper reciprocating j'aws- 33; The lower reciprocating jaws-345-aiie--thus--forrned to eachoppose approxi-- mately' ot'thelength--of'crushing rolliii-and ably secured to the lower portion oi e' 'p'itmansfacesand as shown have -shi'nig surfaces- 3la arcuately curved oni-'substantially the radi-usefcrushihgroll It, andi are' positioned and related to the opposed peripheral surface oi' the crushing roll, at the maximum crushing positions of pitmans I8,- in substantially concentric rel-'ation therewith for customary operation of the machine. The upper or hing area 'of the lower jaws @il may be more or'less planul-ar as shown-5 or may be concave as illustrated inherein identified (so-pending application, but -an-yeven-t divergesangularl-y from the lower con-cave crushing surface 3io-andailso iron-r the-opposing portionof the crushing rolli delriin-g'wi-th. the lower concave surface Mc a ridge Mb'- Wh-ich has an important classifying function the operation oi the machine and particularly controlling and directing the materiali-received for crus-hing between the vlower concave portion of the jaw 34 and the crushing rol-1i as will herein be more full-y explained.

It desire-leleI for certain purposes of adj-ustvin varying the speed and capacity of thev machin-efor production of particles of varying size-y thfatth-'e relationship of the' concave crushing surface 36a and the opposed portion oi the crushing rol-1 be vertical-ly varied Within a slight range.- mile-this varian-ce in the said relationshipmay `be accomplishedin several ways, as shown in the-drawings, I provide above and below the-'respective horizontal jaw edges of member 3%, a sriesof? spacing elements or shiins -3'5 which may vbe removed or 're-arranged to position jaw member 34 somewhat higher or somewhat lower, as desired to its position shown in the drawing. The jaws 3-3 and 3d may be removably secured to the respective pitmans I8v in any suitable manner andas' shown, rectangular retaining clips 3S are employed for engagingA certain of the transverse edges ofthe jaws, clamped to the pitmans by suitable clamp-ing b-olts 36a.

The upper longitudinal edges of the upper jaws 33 are-secured' Aby undercut longitudinal receiving edges `I8b formed just below the journals Ida at the upper portions of the pitmans. The lower edges of the lower jaws 34 as shown, are clamped by upwardly extending clamping bolts 3'! threadedi-y engaging the flanged jaw-holding edges I8c attire lower edge of pitrnans I8.

.In Figures 2 and 3.1 illustrate suitable mechari-ism for controlling distribution oi less coarse material tothe top of rcrushing roll It, said mechanism as shown comprising a pair of ldiverging adjustable deflector plates 39 pivoted at their outer ends to a common hinge axis 4S which extends" normal to the screen chute I1 and having their loweredgs disposed vflush against the top or said screen. The-hinge-for deectingrpiatesia issecured* to landlsupported from. arearwardly: extending post'. Ill: which as. shown. is rig-idlyv at'- tached to; a mounting -plat'eor' bracket 42' secured as by bolts 4'3-'to1the'rear edges off the longitudinal 'ribs IJZa, provided by the heavy tie member i12 which. carries stationary j awf-If3; The d'eector plates 39" are1 .angularl-y adjustable tl'irough: wide limits bymeansof. pivoted links (19a pivoted. to the' ir-mer sides `thereof` and each` hav:- i-n'g-at" the .outer end. thereof; aJ ser-ies of attach.-

ent: apertures. adapted tofreceifvean upstanding pin da provided: by the supporting post 4I. It will beseen thatLthe.-less coarse material. delivered to. the-machine bythe screen-chute. I1 which is promoted*with.E guiding sides I 15a, may be. deflected as: desired. tobe. distributed through. substantially the entire. top: of crushing roll. I6-.or may. be deflected for distribution throughout various areas adjacentithe endsoif; roll L6.I

I providefscraper'.means 'associated with the revolving Crusher rolltoprevent accumulation of gummy material uponthev concave crushing surfacef'd of the-lower. jaw. As show-n, this mecha.- nism comprises ascraper blade -44'of channel construction mo-.unt'ed longitudinally upon the periphery of roll Iwith its. channel. disposed outwardly and asshown'removabl'y secured to 'theouter roll by a plurality ci clarin-.ping bolts 44a. LT-heedges of. the channel bar are adaptedit'o scrape against theconcave surfaces-Mani the lower jaw duri-'ng the operation of lthe machine, .removing any gummy or sticky materiallthereirom in the innermost position-s of the reciprocating jaws.

To protrusively adjust the toggle pivot-seat 29, and-consequently the clearance of thezreciprocating. jaw, efflcient'- mechanism is-.provided as. in Figures Lian-d. 1,.

The, heavy tie bar or frame memberlllwhich connect-s' the lower portions of the; side Walls in, rigidly carries a. pair of spaced perpendicular inwardly extending .webs 39a between which the adjust-ment elements-:tor the pivot' seat are .slidab-ly mounted. 'The back. web or ups-tanding body portion. 3d of .the tiemember constitutes, a seat or vbedxfo-r .the adjustment mechanism and inwardly otsaifdi bed a plurality ofremovable spacer bars. d5 .are disposed. Opposed. rectangular 4apertures VIic` are formed: in the vertical frame. walls it aligned -wifth the; Aspace between the-housing webs that to facilitate removal of one. or. more of the spacing bars `lli from one or bothzsidesrof thev machine. 'The pivot seat member or block .29. has opposi-tely inclined 'or beveled surfaces Maat its rearside extend-ing longitudinally .of the block from the center thereof to the end,`lthe inclination of said -bevel'ed surfaces being o-frelatively small angularity,preferablyless than 30.". I provide a--double wedge. lmechanism inter-posed be-- tween said Abeve-led surfaces 29a and the base -of resistance of the adjustment mechanism, which asf-shown comprises a pair oi" aligned Wedge blocks' E6 i/iavin'g plane surfaces extend-ing #perpendicula-'rly to the ends thereof for engagement with the iin-ner surfaces of the innermost spacer-bar 45 or the tie bar-30 as the case may be :and having inclined or beveled surfaces 46a complementarily for-med and angled for 'engagement with the oppcsitely beveled thrust surfaces 29a offt'h'e pivot seat block 123. vEach 'of-the wedge blocks d6, `as shown, is provided Witha tapped Core #Gb constructed of suitable hard metal, `the coresb of the two Wedge blocks bein-'g oppositely threaded to engage the opposite threads ",ofga 4double screw-operating `member `47 which lis 'dis-f 7 posed transversely of the machine and has, as shown, squared manipulating ends 41a extending beyond the walls of the machine frame for connection with an adjustment crank or other device for turning the double screw.

With my said toggle pivot-seat adjustment mechanism, because of the combination of the removable spacer bars 45 with the wedge mechanism having wedge surfaces angled quite gradually, power application is multiplied when the double screw 41 is turned and wide adjustability of the pivot seat and consequently the spaced relationship of the Crusher jaws is efciently obtained. Thus when it is desired to space the crusher jaws widely apart, one or more of the spacer bars 45 may be removed through one of the lateral apertures IUc in the frame wall and the wedge mechanism adjusted properly thereafter,

To close the apertures Ilib in the frame walls I0, to prevent leakage of oil or lubricant and access of foreign material to the adjustment mechanism, I provide at each side of the machine frame a closure plate 48 which overlaps the associated aperture II'Ib. Each of the closure plates 48 is provided for bolt and slot connection with the edges dening the aperture and secured adjustably over the aperture by bolts 48a. The plate is sufficiently long in each instance to cover the aperture and provide a bearing 48D for the double screw member in the various positions of the wedge block-s 46 when one or more of the spacer bars 45 are removed.

Operation The crushing unit illustrated in Figures 1 to 10 inclusive and herein previously described, is associated with a crushing and screening plant having a feed conveyor (not shown) and having a classifying two-deck screen of which fragments of the upper coarser screen Ell and the lower finer screen I1 are shown in Figure 1. In such a plant the coarse material to be ground is conveyed by the screen chute 50 to the top crushing jaws and the material crushed is received below the machine by return conveyor not shown and conveyed to the finer screen I1 for secondary grading, the finely ground material dropping through screen I1 into a collection bin shown in Figure 1.

It will, of course, be understood that my crushing machine, or unit, including the ecient crushing cooperation between revolving roll I6 and the reciprocating

jaws

33 and 34 per se, may be utilized in many installations and for many purposes all within the scope of my invention.

In operation rocks or other hard material of 12-inch ring size or smaller are delivered to the top screen chute 50 which separates off the larger material to be crushed above a predetermined size-say for example, a size in excess of 2 inch ring. The small rocks and material drop upon screen chute I1 and are fed thereby between the heavy tie bar I2 carrying the Xed jaw I3 and the roll I6 being delivered to the top of the roll which guides the smaller material between the crushing portion of the roll and the reciprocating jaw 34. The fines, of course, drop through screen I1 and are collected in the bin or hopper B. The larger rocks and material are fed by the coarse screen chute 50 and the top of jaw I3 to the entrance of the machine between stationary jaw I3 and the upper reciprocating jaws 33 where they are crushed and reduced to smaller size. In the successive reciprocation of the two or more pitmans I8 the

jaws

33 and 34 are moved successively toward the stationary jaw I3 with a coni-I pound downward movement as they approach maximum crushing position, this downward movement tending to draw the material downwardly between the jaws. The distribution of applied power with my improved device is greatly improved over machines of the prior art since a plurality of pitmans are used having eccentric connections with the main shaft I I at varying angles to successively move the several jaws against the associated crushing elements, thereby improving the crushing efiiciency of the machine and more uniformly applying crushing power against the upper stationary jaw and the crushing roll.

The material crushed between stationary jaw I3 and the upper jaws 33 of the pitmans drops by gravity to the secondary crushing mechanism below and is fed between the roll I6 and the lower jaws 34 of the pitmans. To this material is added material which is being fed to the machine by the declined classification screen I1 entering the machine laterally between the stationary jaw I3 and the top of crushing roll I6. By reference to Figures 6 to 8 it will be seen that in view of the compound movement of the pitmans and the cooperation between the roll I6 and my lower jaws 34 particularly the concave portion 34a, the receiving position between the lower jaws of the crushing roll as shown in Figure 6 presents a converging space for the material dropping by gravity from the first crushing operation or fed into the machine by screen I1 and thereafter in the maximum crushing stroke or position shown in Figure 7 causes disposition of the concave surfaces 34a of the lower jaws in substantially concentric relation with the crushing roll and thereafter as pitmans I8 are retracted from the crushing roll, presents a diverging space between the cooperating portion of the roll and the concave portions 34a of the jaw for discharge of crushed material by gravity and with the assistance of the revolving roll. At the times of discharge and of maximum crushing (Figures 8 and 1 respectively) it will be noted that the transverse rib 34h defined by the intersection of the concave jaw portion 34a, with the upper substantially flat contiguous jaw portion, is maintained at more or less a predetermined spaced relation to the contiguous surface of the crushing roll acting as a classifying mechanism to prevent reception and discharge of material below a predetermined size as the jaw is retracted from the crushing roll. The surface above the concave surface 34a of the lower jaws is angled with respect to the concave surfaces and with respect to the crushing roll and diverges sharply from the Crusher roll to properly guide the material for the secondary crushing.

Thus an eflicient control of the feeding of all material between the crushing and cooperating lower jaws 34 is provided with the vwithholding of this first crushed material between the crushing roll I6 and concave portion of the lower reciprocating jaw 34 until one or more full strokes of the reciprocating crushing jaws have acted upon the material. The material crushed between the roll and lower jaws drops in the discharge strokes of the respective lower jaws upon a return conveyor (not shown), if desired, which delivers to an elevator (not shown) which delivers to a feeding conveyor (not shown) carrying this material to the classifying screens or at least to classifying screens I1, the fines then passing through screens I1 into the collection bin B. In the crushing of the material between the roll I6 and reciprocating jaws 34a the jaws move,

9i at relatively .high ,speed to fthe travel oftheI roll. The speed ratio, timingand relationship .of `the concave areas with the resultant slight tilting of the -pitmans in their reciprocation with the small downward and upward component movements are such that preferably material will not be released at the bottom of the machine until .it has been subjected tol `at least. two .crushing strokes of the reciprocating jaw. The controlV effected by the relationship of the ribs V3111) at'they upper edge of the yconcavecrushingsurfaces is important in cooperating to'A this unitary result and consequentlythe crushed material dropping from the bottom of the machine is of Aquite uniform size. This means that a much smaller percentage'of material mustbe returned to the'machine for axsecond .crushing than in Crushers now extensively utilized.

Great latitude for adjustment inthe spaced relation and positioning of the lower jaws 34 and particularly the Aconcaved portions 34a to the associated side of the crushing roll is made possible with my improved construction. The spaced relationmayibe readily adjusted bythe double screw actuated mechanism for adjusting the -pivot seat 29-of1the toggle. Adjustment of therfulcruming of the pitmans `I8 within 1limits is made vpossible with my .improv-'ed structure, first by selectively engaging the inner or upper edge of the -toggle plates 21 withone `of the other of the `rrecessesy 25a ofthe fulcrum seats 25 secured to'the'respective pitmans and secondarilyby re-arranging the shim, or shims, or other spacing means 26 interposed between'theseat block 25 and its attachment 'lug'sr28.

'Another ver-y important relational adjustment whichis obtained with my improved apparatus is effected through the provision of means -zfor` ver,- tica-lly adjusting the 'concave' surfaces 3`4a of the lower jaws relative to the cooperating side por-y tions of roll I6. The provision for such adjustment in -th'eembodiment shown comprises la lplu-V rality of spacerv strips or shims 35 interposed between the upper and lower edges of jaWfSI-and-its seat and securing members, whereby the rearrangement of thev shims, as illustrated-in Figures. 9-and 1,0.=and the relation of the concave surfaces 34a of the jaws to the crushingI roll can be changed Withinilimits.

In Figures ,9 and the lower jaws and rolls are illustrated inl extreme crushing position. vIn Fig*- ureg, Vthe lower jaw has been raised above the position shovfninligu-res'land 6 to 8 of the drawings. This is desrablewhere a very fine grade of Y,the output of material is desired and-where the 4material `fed into the machine''is not '-too coarse. 'in the-adjustedposition shown in Figure 9,-whi=ch it is lto be remembered is the maximum' crushing'position, the concave surface ySila isnot disposed quit-e concentrically of roll' t6 but diverges'from'fits upper-to its lowerportiontherb Mb stillacting as a classifying medium but `the lower ribs -'flcdened by the intersection of the concave surface with the lowermost surface of the jaw'also beinga classifying medium and -servingto retain material forone orlmore additional crushing lstrokesbefore it is discharged from' the machine.

-InFigure 10 the positional relationship of the lower crusl'iingrjaw--3ltA has been lreversedfrom that shown. in 'Figure 9, Figure l0 being in lowered position'` obtained by-shifting of `spacing shims 35, than theusual operating position-showniinfFigure'l-.andzl'igures 6 to 8. Againit is tube-remembered that in-li'lligu-re 10 jawA34 .s-ishown'fin 10 its vmantimum crushing position 4relative tothe roll IS.. Here it will be seen that the space between the jaw and roll diverges from top to bottom of the crushing area, thereby tending to speedup ldischaI-geof `material and the rib 34h of thefupper edge ofthe concave surface chiefly acts as the classifying medium. 'Iihis positional relationship shown in Figure -10 is preferred for the crushing of coarser products and for speeding'uptheicapacity yof the machine, andthe material crushed between roll |56 and jaws .34 may be 'subjected Ito only one complete crushing action before discharge.

The area .relationship between the upper reciproeatingv jaws 33 and the lower -jaw '34 which crush aga-inst vthe .roll as well vas the distribution of .the crushing load is very important. `With my lconstruction the feed gates or deector plates- 35 mounted edgewise upon the screen chute-fl :1 may b e adjusted depending upon the amount lof material at any predetermined' time which is fed tog-the secondaryxcrushing mechanism by screen i l to obtain a substantial uniform crushing load over the entire 'length' of crushing roll l5. Thus if the raw material to be crushed containsaconsiderable percentage of small material which passesthrough .the upper classifying screen :50, the gates 'are adjusted to Vdistribute pretty' yuniformly to the greeter-.portion of the crushingroll. Winilei'f only a relativelyzsmall amount of smaller sized material is .being fed into the machine'over the screen. chutev Il, the gates are adjusted to direct most of thismaterial to the outer o1-end portions of the crushing roll since 'the lload upon the ,central vportion ofv the crushing( roll will y'be relatively -hea-vy `duetto a greater percentage of raw material being crushed by jaws .33 and" the stationary-jaw. f f

.:Erom vthe foregoing description it' will beseen Jchat fI have provided a. comparatively light, highpowered vcrushing unit having a .very high eiliciency and capacity for its weight `and furthe power applied and particularly' adapted for' a .number of different .adjustments Vto suit -`particu lar requirementsv as to size of the crushed material desired. Y I

'In :Figure 1d. .asimplied crushing Amachine-#is illustrated employing many of .the features of the o rm` of my,inyentionxiirst described. In lthis machineno .stationary crushing law is utilized but all crushing operations Vare effected between a reciprocating jaw .5l and a revolving crusher` roll 52. Ilhe mounting, toggle mechanism 4and adjustment mechanism -for the 'pitmans and ire-- ciprocating jaw :55| are vsimilar to the ymachine first described and, therefore, need not be .here described-inldetail. :The-,jaw 5.| has an upper concave .crushing portionffila which diverges considerablyrfrom'fthe .:lower .portion thereof to its upperifportion with reference tothe cooperating sidefof, crushingarollrZ .and `is preferably provided with aseries of transverse yteethor ribs 51h-to cause-,the larger material lintroduced to'be gripped andifprevented'from upward slipping.

uppenconcaye crushing surface .5 I amerges at lrits lowerfedge, .with a lower concave crushing surface' ..5105 defining in :its intersection*` with said lower concavensurface'a classifying rib 51d, the

said upper Ysurfacediverging materially from thel curve `or segment ofthe lower concave surface 51e.A 'Ehe-lowerconicave surface 51o is preferably unribbed and uncorrugated. K

While thejaw 51- may be integrally formed throughout to .denethe -two concave crushingy portionsfor surfaces 5ta Land y."I c, I' prefer--tcform f a concave crushing jaw portion 51o through the provision of a replaceable jaw section. Thus this jaw section Ic which receives more wear than the upper concave section 5Ia vmay be readily replaced and, as shown, is attached to the pitmans by means of a plurality of clamping bolts 54, which extend through truncated conical apertures disposed in transversely spaced relation across the pitmans.

In this form of my invention the crushing roll is revolved in clockwise direction to assist in feeding material between the cooperating crushing members and to move such material downwardly for crushing and discharge, and the fast reciprocating jaw will first crush the coarser material between the upper concave area and the crushing roll, such material after original crushing, working down and being classified by the relation of the lower concave crushing surface 5 I c and classifying rib 5Id into position between the lower concave crushing surface 5lc and the lower side of the crushing roll 52 opposed thereto. Secondary crushing .then takes place and the material in sub-divided state and in fairly uniform size is delivered at the bottom of the machine.

Here again `as illustrated in Figures 9 and 10 the positional relationship of the lower* concave crushing surface 5 Ic may be varied within limits through the arrangement of two sets of spacing strips or shims 35 between the edges of the jaw member 5|' proper and its seated edges. In this formof the invention two or more reciprocating jaws may be employed in opposition to the revolving roll,l if desired, to more uniformly and efficiently distribute the power from its source and the application of that power against the crushing roll.

It will, |of course, be understood that various changes may be made in the form, details, a1'- rangement and proportions of the parts without departing from the scope of my invention.

Y What I claim is:

1. In a crushing machine, a rotary crushing roll, a reciprocating crushing jaw opposed to one side of said roll, means for revolving said roll in a direction to cooperate with said reciprocating jaw for material feeding and crushing purposes, means'for reciprocating said jaw toward and away from said crushing roll with a compound, limited downward movement as said jaw approaches said roll, said jaw having a lower concave crushing surface opposed to a side of said roll and extending substantially concentric thereof and said roll carrying a Vlongitudinally extending blade protruding from the periphery thereof for engaging said jaw to scrape sticky material therefrom.

2,. In a crushing machine, a stationary crushing jaw inclined somewhat from the vertical position, a horizontal 'crushing roll mounted below said' stationary jaw and spaced therefrom, said roll being substantially longer than the width of said stationary jaw with its ends projected beyond the sides of said jaw and mounted with one side of its periphery disposed at least close to vertical alignment with the lower edge of said stationary jaw,'a Aplurality of common reciprocating jawcarrying members opposed to both said stationary jaw and said crushing roll, a plurality of upper crushingk jaws attached to said reciprocating members and disposed in side by side relationship and having an aggregate width substantially equal to the width of said stationary jaw, a plurality of lower crushing jaws also securedl to said respective reciprocating member and disposed in side by side relationship in opposition to one side of said crushing roll, the aggregate width of said lower jaws being substantially greater than the' aggregate width ofsaid upper jaws and being substantially equalto the lengthof said crushing roll, means for feeding coarse material between the upper portions 'of said stationary jaw and said upper reciprocating jaws, means for feeding less coarse material from outside of said machine over the projecting ends of said roll, means forrevolving said roll to convey said last mentioned material downwardly toward said lower reciprocating jaws, means for reciprocating said plurality of reciprocating members in4 staggered relation to produce successive crushing operations of said several reciprocating jaws against said stationary jaw and said crushing rol1,`and means for varying the area of distribution of said less coarse material upon the top of said crushing roll.

3. In a crushing machine, a horizontal crushing roll, a reciprocating jaw-carrying member opposed to one side of said roll, means for revolving said roll in a direction to cooperate with said reciprocating member for feeding and crushing of material, means for reciprocating said member toward and away from said crushing roll with a compound limitedl downward movement as said member approaches said roll, a jaw attached to said reciprocable member and having a concave crushing surface opposed to one side of said roll and curvedin general along a segmental path substantially concentric with said roll and means for supporting said jaw from and attaching said jaw to said reciprocable member in a plurality of different vertical positions relative to the lower end of said reciprocable member to thereby vertically vary the positional relationship of said concave crushing surface relative to the opposed cylindrical surface of said roll whereby the discharge ofv crushed material from the machine may be selectively retarded or expedited within limits;

4. Ina crushing machine, a stationary crushing jaw inclinedsomewhatfrom the vertical position, a horizontal crushing roll mounted below said stationary jaw and spaced therefrom, said roll being substantially longer than the width of said stationary jaw with its ends projected beyond the sides of said jaw and mountedwith one side of its periphery disposed at least close to vertical alignment with the lower edge of said stationary jaw, a plurality of common reciprocating jaw-carrying members opposed to both said stationary jaw and said crushing roll, a plurality of upper crushing jaws attached to said reciprocating members and disposed in side by side relationship and having an aggregate width substantially equal to the width of saidstationary jaw, a plurality of lower crushing jaws also secured to said respective reciproeating member and disposed in side by side relationship in opposition to one side of said crushing roll, the aggregate width of said lower jaws being substantially greater than the aggregate width of said upper jaws and being substantially equal to the length of said crushing roll, means for feeding coarse material between the upper portions of said stationary jaw and said upper reciprocating jaws, `means for feeding less coarse material from outside of said machine over the projecting ends of said roll, means for revolving said roll to convey said last mentioned material downwardly toward said lower reciprocating jaws, means'for reciprocating said plurality of reciprocating members in staggered relation to produce successive crushing operations of said several'reciprocating jaws against said stationary 13 jaw and said crushing roll and means for controlling the feed of less coarse material from outside of said machine over said roll.

EINAR H. ANDERSON.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 49,032 Ingersoll July 25, 1865 55,181 Wagner May 29, 1865 197,643 Lanyon Nov. 27, 1877 697,802 Calkins Apr. 15, 1902 Number 1o Number France Nov. 22,1906