US1132047A - Apparatus for crushing or recrushing rocks, ores, &c. - Google Patents

Description

M. T. THOMPSON. S POR GRUsHlNG 0R BEGRUSHING ROCKS, GRES, 5w.

APPARATU APPLICATlON HLED DBG. 5. 190?. Y 4

Patented Mar. 16, 1.915.

2 SHEETS-SHEET l.

hem im M. T. THOMPSON. RATUS POR @RUSHING- OR REGRUSHlNG ROCKS, GEES, lfsm.

APPLICATION FILED DEG, 5. 1907.

Patented Mar. 16, 1915.

2 SHEETS-SHEET 2.

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@ULM/Lewes 1 .ELTDN T. THGMPSOT, OF MEXICO, MEXICO.

APPARATUS FR CRSHING 0R RECBUSHING ROCKS, GRES, 85o.

Lianne?.

Specication of Letters Patent, Patented Bitti". i6, 1915i Application filed December 5, H3G?.Y Serial No. 65,933.

To all whom a't ma concern Be it known t at I, MILTON T. Tiioiurson, a citizen of the United States, residing at Mexico city, State of Mexico, and Republic of Mexico, have invented certain new and useful improvements in Apparatus for Crushing or ltecrushing Rocks, Gres, dac., of which the following is a specification.

My invention relates to .an apparatus for crushing rock or similar material, and more particularly to such machines comprising a casing within which is located a rotary Crusher, the rock being broken and comminuted by said pressure passing out of the bottom of the Casing and more particularly my invention relates to a Crusher wherein rotary freely swinging hammers are pivotally mounted 'to rotate about a central shaft but having their axis of rotation radially arranged at a distance therefrom and whereby a shattering blow is struck the rock before it is brought beneath the hammers and either so finely broken as to pass out through' the lower portion of the apparatus or thrust against the hardened and reinforced walls to be again brought iny Contact with the hammers.

The object of my invention is to provide a machine for this purpose which will crush or 4coinniinute the rock to 'a degree of neness not readily attainable with ordinary wcrushers or crushing machinery; and more particularly to treat material previously crushed in a primary Crusher, my machine being eminently suitable to be used as a. re-

crusher to any of the large standard makes of rock crushers,-another object attained by my machine being that the rock is acted uponby the hammers almost immediately upon its 'introduction to the casing, thus vobviating excessive wear on themachine.

My invention consists in thearrangement' of parts and details of construction herewith described and particularly set forth in the appended claims. v

In the drawings, Figure 1 is a longitudinal section of the crusher, the rotating hainmer element, however, being in elevation. Fig. 2 is a transverse section on the line of Fig. i, the hammer heads them selves, however, being in elevation.

Like reference characters v"designate like y parte.

fy crusher comprises agrasing having a gea-eral hopperhke. shape, an inlet opening in and e rotatabie element se i0-,

cated with reference to the inlet opening that the material falling therethrough will be caught and thrown against the sides of the casing, the Walls of the casing being provided with hardened anvil plates for the purpose of breaking the fragments of material hurled against it. The lowest portion of the casing is provided with a perforated bottom through which the coniminuted material passes.

Iii-detail the construction is asfollows': The casing is inade of ordinary sheet steel such as used in the construction of tanks, etc., and is of any desired thickness. It comprises side walls 1 and end pieces or aprons 15. The side walls 1 are supported by angle irons A which in turn vrest upon sleepers A. l

18, 1S are bolts which connect the side walls of the machine to each other, and 18',

18 are spacing sleeves surrounding the bolts and located between the side walls and holding the saine spaced apart. 1X designates the top of the casing which is uninterrupted save for the inlet opening 19 hereafter referred to. Attached to the top of the casing by means of angle irons and bolts, and

cated a series of blocks 11, the same being preferably manganese steel castings. As I have embodied my invention in the draws ings there are four of these blocks to each pair of plates 9, said blocks being located onfour sides of the octagonal plates.r These blocks are held in Dlace by a pin or rod 11, which passes throiigh all the disks from one side to the other. This rod may be held inA place by a nut or by a key as I have shown it. In order to hold the blocks 11 firmly in such position that the axis of the blocks projects radially from the center of the shaft 1, I provide the filling or corner pieces 10. `@ne of these iilling pieces is placed on the rear side of the block 1l and is fastened in place by bolts or rivets l0 passing through each pair of plates. .These lling pieces 10 as will be noted from Fig. 1, have their upper edges parallel with the edges ofthe Between plates 9 and oroiect beyond the same. thus forming shoulders or buiers which protect the corners of the'plates 9 and prevent contactbf the rock therewith. At the same time they provide additional means whereby the plates 9 are properly spaced apart and the block 11 held in position.

Attached between each two of the blocks 11 is a hammer or breaker 1Q of cast or forged manganese steel. These hammers hare at their outer ends a head and at their inner ends are pivoted or loosely hung between each two of the blocks 11 upon a rod or pin 1:7. which passes through all the blocks and is common to all the hammers.

The shaft 10 is supported in bearings 16 and carries a band wheel 2O whereby it may be driven.

The interior of the casing is lined with plates of chilled steel which are made so as to be readily removable and replaceable when worn out, the relatively small area of the plates permitting of their easy handling and also obriating the necessity of throwing away a large plate because.v of its being worn out in one portion. The particular plate so Worn may be quickly detached and anotherA one replaced. As will be seen in Fig. l, I

preferably line the sides of the casing withv a series of segmental plates 8 which project inward toward the shaft 16 to aposition within the periphery of the plates 9 and project slightly' outward beyondthe hammers 12. The rest of the side walls is covered by the plates 6, 6 and 7, 7 TheitopI of the entrance end of the casing is covered by the plates 5. All of 'these plates are held in position by the tapered, square-sectioned bolts 1T. The heads of these bolts, as will be seen, are square and gradually, taper down to the bolt shank proper which pro.- jects through the casing walls and .is there provided with a nut. By this means the lates may be drawn securely in position and held firmly from any rotative action, and they may be also drawn up tightly at any time, while at the same time the bolt itself dees not project out beyond the face of the chilled steel wall. f 3, 3 designate angle irons bolted tothe side of the walls and carry upon them a plate of sheet steel this plate in turn supporting at a tangent to the arc ot rotation of the hammers 12, the heavy cast steel platesl 5, 5', which receive the shock of the falling material driven down upon them by the hammers 12. .lt will be seen that the casing end '21 does not extend downward to the plate '-1 or to the angle iron 3. and through the opening thus formed in the inlet end ot' the machine the plate 4 and the heavy face plates 5. 5 may be inserted or removed. Inasmuch as these plates have to bear the brunt of the downwardly driven material and hence are subjeted'to great Wear', they need to be more frequently re' moved and replaced than either the'plates 6, T or the top plates 5. It is to be noted Ithat the inclination of the plates, 5 is such as brings them at right angles to the line taken by a piece of rock falling through the opening 19 and struck by the hammer 12, the plates being therefore set at a tangent to the circle described by the hammers.

'2, Q designate angle irons bolted to the side walls which extend beneath the rotating hammers in the arc of a circle and then upward at an angle slightly less than a tangent to the upper corner of-the casing opposite to the inlet end. The ends `of these angle irons 2 act as stops for the plates 5", 5, 1nd they also, as will be seen Jfrom Fig.` Q, support the gratings 13,14. These gratings are preferably made in sections and may be easily removed, the sections extending transversely and filling the space between the angle irons '2. Each grating is provided with two ribs 13 projecting down'- wardly below the ylevel of the upper portion of the angle irons 2 and thus acting to hold the sectional grat/ing in place. The gratings 13 extend upward on the tangentialextension of the angle iron 2 to a point somewhat beyond the arc of rotation of the hammers 12, the remainder of the distance to the upper corner of the machine being covered by a perforated plate 14 of sheet metal. Inasmuch as the material carried upward by the hammer at what may 'be termed the rear of the machine is thrown upward against the top of the machine, there is no f necessity for making the portion 14: of heavy grating as -is the case with the sections 13. The upwardly tung pieces of roclr strike against the face of the' casing or are carried over and Hung violently against the facing of the end portions 21'.

19 designates the opening whereby the material is delivered to the hammers, this opening being so located that vthe material is deliveredinto the path of the hammers themselves,

22 designates the outlet opening of the machine at the lower end of the aprons 15. l5.

In operation, the shaft 16, the plates 9 and the attached hammers 12 are rotated at a peripheral speed of approximately 4,000 feet per minute. This is fthe leastlspeed under which the machine't-'willdo good work. Material is introduced through the opening 19 and at once falls by, gravity into the path described by vthe hammers 12, is struck -by them and dashed violentlyfdown- Ward against the two lower plates 5', 5". From these plates theY material settles by gravity downward toward the middle of the machine and again comes within the circle described by the hammers and is dragged or ,Y raked over the perforated gratings 13. The

i insana? 8 leventually being carried around bythe sweep o violently down upon the plates 5'., to be again,` dragged over the gratings 13. Portions. of stone .which are' broken by being thrownfviolently upward at a tangent'to the are of rotation of the hammers and against the top of the machine will fall directly downward against the perforated plate 14. Material sufficiently bomminuted will pass Y through these plates and the rest will gradually' worlr downward along the plate le and the gratings 13 to beeagain thrownupward lby the hammers, as beforey de` scribed. A

While' have shown whatv I deem to be l the. preferable construction -o my Crusher,

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I do not wish to be limited 'to theiexact details shown as the spirit of my invention might be embodied in diierent forms without in any way departing therefrom.

. The adyantages of my machine are particularly in the means whereby the material introduced into thefcrusher -is immediately attacke'ld' and reduced in size before being conveyed to some other portion of the inter'ior, distant'from the point of introduction, thus wear Aand tear on themachine is considerably reduced. 'Another point of advantage lies in the fact thatthe material, thrown from'the hammers, tends vto break upon itself, since. material or rock carried over bythe uppermost hammersis thrown against ,the descending pieces of rock,

breaking the saine and being. broken and flung with great' orceagainst' the end plates 5 5. Thus Ynot only do the hammers opcrate directly omthe'material to be treated but also indirectly by means of the manner in which pieces of roclr are thrown olf from the hammers against each other and against the plates 5. It will be seen then that there is Ano 'grinding-action but a breairiingorA crushing action,y one'A piece againstenother or. againt theliardened steel `plates 5', 5';

' Because of -thedact that therapie no actual grindingffgthe s'tones,.the sets of hammers may-be rotatedfat ayeryxhighl speed. The

.combination4 of disks, bushings and the the hammers and again thrown hammers is particularly convenient in case 'it is desired to repair or renew the hammers or any one of the elements of the combination. lhe same may be said with regard to the sectional gratings and the sectional lin- , ing pieces 5, 6, 7 and 8. Any one of these may be easily renewed without removing` the bthers. and thus delays are very largely minimized. It will alsoibe noted that the tapered bolts do not lose their grip or enggagement with the plates 5, though the end of the-bolt may be constantly wearing down along Vwith the plate. important as the heads of bolts of the ordinary'character would be soon worn away whereupon the plates would fall out of position'or become loose.

1 Having described my invention what I claim is:

1.1m a rock Crusher, a casing having hardened interior walls, an inlet opening andan outlet 'grating 5 a shaft passing diametrically through said casing; a series of pairs of spaced plates mounted to rotate with said shaft; a series of blocks located between each pair of plates and radiating therefrom and removably attached to said plates; and hammers located between each two of said blocks, all of the adjacent hammers being pivoted to said blocks by a com- 'mon pin or shaft passing through all of said blocks and hammers and being movable independently of each other on said shaft.

2. In a rock orusher, a casing. having This is particularly hardened interior walls, an inlet opening and an outlet grating; a shaft'passing diametrically through said casing; a series of pairs of polyhedral plates mounted to rotate with said shaft; a series of blocks located between each pair of plates and radiating therefrom and removablyfattached to said -plates; relativelyhardened boiling corner pieces attached between each pair of plates and progectmg beyond and protectingthe 'corners thereof, said pieces being located one on each Side of each of the projecting blocks; and hammers located between each twobf said blocks, all of "the adjacent hammers being pivoted tov said blocks by a com- .mon pin or shaft passing through each row otsaid blocks and hammers.

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1n testimony` whereof, I hdve signed-my name to this specification inthe presence of two subscribing* witnesses, v"this twentieth day of November 1907. Y l -MILTQN T. THOMPSON. I

,Witnessesz Cantos `MNDEs "CANTRI, "EDnAnoo Yonssms Osanna..

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