US1528741A - Gyratory crushing machine - Google Patents

Description

Mar. 3, 1925- 1,528,741l

w. s. WESTON GYRATORY CRUSHING MACHINE Filed March 29, 1921 .'5k Sheets-Sheet l z EL 2 V I t 4?, aa /ff j' 'a 27 ,23 FU" l al L- la 23 23 24,

.2 5 Zb/ef M IMI-MMM@ Mar. 3, 1925 W. s. WESTON GYRATORY` CRUSHING MACHINE Filed March 29, 1921 Patented Mar. 3, 1925.

UNITED STATESv i 1,528,141 PATENT OFFICE.

WILLIAM sTEvENsON WESTON, or COLUMBIA, SOUTH CAROLINA, AssIGNOR To `WESTON AND BROOKER, ENGINEERS, or COLUMBIA, SOUTH CAROLINA, A PART` NERSHIP COMPOSED OF W. S. WESTON,

GYRATORY GRUSHING MACHINE.

'l'. I. WESTON, AND B. O. BBOOKER.

Application filed 'March 29, 1921. Serial N0. 456,663.

To all whom t indy/concern Be it known that` I, VVi-LLIAM S. IVESTON, a citizen of the United States. and residing at Columbia, Richlands County, State of South Carolina, have invented certain -new and useful Improvements in Gyratory Crushing .Machines of which the following is a specification.

The present invention relates .to gyratory.I

Crushers of the -kind usually used for crushing rock and ores, to obtain materials to be used in the `building, cementand other related industries. T he invention relates pai'- ticularly to the type of gyiatory crusher having a vertical shaft pivotally mounted at one end in a stationary frame, its other end being journaled within a rotatable sleeve or eccentric, the axis of the shaft being eccentric to the'axis of the sleeve and having powermeans for rotating the sleeve so that the shaft has a. ,gyratory motion which enables the. crushing cone `or head secured thereon at a point intermediate the ends of the shaft, to exert a powerful crushing force against the stone passing downwardly between the crushing head andthe crushino' hopper surrounding the same and secured in the casing, this hopper constituting a stationary cylindrical crushing jaw and the crushing cone constituting a movable crushing jaw of the l,machine t Gyratory crushing machines of this class which have heretofore been designed or suggested have. usually been 'constructed with the shaft pivotally supported at its upper end and with rotatableeccentric' sleeve at its lower end, this sleeve being driven by gearing, belts, or "pulleys, #from suitable power means. The type of gyratory crushing `machine, in which thhegyratory shaft is pivotally supported at-nts base and the rotatable eccentric atr the top has not come into use owing to the practical diiliculties of design met with. such as the diiiculty ofproperly lubricating the eccentric sleeve and the.f difficulty of keeping the dust generated in the crushing operation out Of the driving mechanism and out ofthe lubricating system. IVhere the gyratory shaft is pivoted at its upper end and driven at its lower end trains of'gears, Or systems of sheave and ropes have Lbeen found necessary to apply the power and ,such mechanism mu'st necessarily be containedlwithin a small space, rendering the driving mechanism relatively complicated and causing unneces-A sary frictional losses due to the multiplication of parts. Due to the great frictional losses the bearings must be frequently replaced.

Furthermore, in former types of gyratory crushe-rs in which the shaft is pivoted at the top' and which are particularly adapted to crush -the aggregate of aprevious crush, that is, one which serves as a Secondary or reducing machine, unnecessary power is used due to great frictional resistance, and the parts are subjected to excessive -strain, because ofthe Afact that the crushing action of the jaws is greatest at their lower ends and least at their uper ends due of course to the fact that the eccentricis located at the lower end of the shaft and the motion of the shaft becomes less and less as the distance from the eccentric increases. Theoretically theseconditions should be reversed, that is, the crushing motion should be greatest at the entrance to the crushing jaws and least where the rock escapes.

Another objection to such machines heretofore designed resides in the large size of the eccentric. sleeve found neceary. Increasing the size of the eccentric has cut down the speed at which the shaft can be gyrated on account of the practical requirements of bearing speeds and the limitation of gear speeds.

In addition the machines of the prior art have usually been so mounted upon their foundations that the actual crushing action takes place at an elevation considerably above the point of support, that is, above the point where the frame or casing of the machine is secured to the foundations. This results in an excessive vibration of the entire machine. y

Furthermore, the location of the driving mechanism adjacent the base Of the shaft exposes it to clouds of dust and grit which result from the crushing operation. Usually such driving mechanism is positioned below the foundation level and the opening for feeding the4 rock into the machine. In such exposed location the driving gea-ring or other means must be Carefully surrounded by or enclosed within a substantially dust-proof casing, rendering the -machine more expensiveland complicated and rendering the moving parts of the driving mechanism less accessible.

In accordance with this invention a gyratory crushing machine is provided in which the shaft is driven by mechanism located adjacent its top. This mechanism comprises an eccentric sleeve surrounding the shaft, a swivel bearing supporting the sleeve in such a manner that it may be freely rotated while at the same time may change the direction of its axis to compensate for slight inaccuracies in construction 'and subsequent bending of the gyratory shaft in crushing hard materials, and means for driving the eccentric directly without the usual intermediate gearing. A novel oiling system is provided for maintaining the bearing surfaces of the eccentric and its supporting bearing` properly lubricated at all times. The casng of the crusher is adapted to be supported upon' suitable foundations, the points of support being substantially in the same horizontal plane as the crushing jaws so that the shock and strain incident to the crushing 'operation is transmitted horizontally directly into the foundations. The crushing hopper is formedr in several sections instead of .-1 single piece and may be quickly and easily assembled in position and removed or reversed. rIfhe crushing cone extends upwardly above the upper edge of the crushing hopper a substantial distance and above the level of the entrance through which the rock is supplied, and this extension serves as a stirring member for aligning the stones to more freely enter between the crushing jaws, and to more evenly distribute them around the crushing cone.'

The improved crusher has therefore a number of advantages over crushers of this class heretofore known. As the eccentric is directly driven either by an electric motor or by a pulley, trains of gears, etc. are not necessary, with the resulting loss of power which their use involves. The crushing movement of the jaws complies more nearly' with theoretical requirements inasmuch as the shaft is pivotally mounted at its lower end and driven from its upper end so that the lateral or crushing movement of the movable jaw or cone is much greater at its upper end than at its lower. The eccentric being relatively small and directly driven may rotate at a much higher' speed than other eccentrics, thus increasing the production of the machine. Vibration is decreased to a minimum due to the manner .in which the casing is supported. y The machine is so designed that it is practically impossible for dust to contact with any Wearing surfaces, and the various movingparts are arranged to be readily accessible for thel purpose of inspection and repair. The novel oiling system whereby the eccentric is continuously lubricated involves circulation of a relatively large body of oil in a closed circuit which includes the bearing surfaces of the eccentric and into which circuit no dust or grit may enter.

The construction of the crushing hopper in sections which may easily be taken apart, enables it to be removed and to be reversed whereby its useful life maybe greatly prolonged, and the extension upwardly of the crushing cone above the crushing hopper and feed opening results in a much more even feed of material between the crushing jaws, the individual stones being both properly aligned by the stirring movement of the cone, and the stone being more evenly distrfbuted around the hopper.

To one skilled in the art still other advantages will be apparent from the disclosure of one embodiment of the invention in the following description and 'in the accompanying drawings.

In the drawings:

Figure 1 is a side elevation of the crusher as mounted upon a foundation, partly broken away to show the interior construction;

Fi re 2 is a side elevation of thc eccentric s eeve;

Figure 3 same;

Figure 4 is a section on line 4-4 of Figure 2;

Figure 5 is a section through a portion of the casing showing the crushing hopper;

Figure 6 is a section on line 6-6 of Figure 5;

Figure 7 is a side elevation partly broken away, of the upper portionof the crusher, the eccentric being arranged to be directly driven by an electric motor instead of by a pulley.

The casing of the crusher has three poris a longitudinal section of the tions; a main portion 10, which is substantially cylindrical in shape, and has external annular ianges 11 and 12 at its upper' and lower ends respectivel yy; a bottom portion 13 in the form of a spider having an annular ring porton 14 adapted to be bolted to the flange 12; and an annular cap 0r ring 15 adapted to be secured by bolts to the l.

iiange 11. The casing 10 has two diametrically oppositely positioned openings 16 which serve as feed openings, and has a cylindrical surface 17 directly below the lower edges of these openings to which the crushing hopper is secured. This hopper, as clearly illustrated in Figures 5 an'd 6, comprises four portions, two main portions 18 and 19 and two minor` ortions 20 and 21 which are formed as we ges. four portions of the crushing hopper has a backing of metal such as zinc, as indicated at 22 and these portions are so formed as to fit closely within the cylindrical portion of the casing when assembled. The wedges Each of the and 21, when forced .into position, cause the hopper to be tightly wedged in position but these wedges may be withdrawn and the hopper reversed in position whenever desired, that is, the hopper may be Aturned upside down and re-assembled so that the wear due to the crushing action may be evenly distributed, and amaximum length of llifeV of the hopper insured.

The spider 13 has a plurality of legs 23 preferably three by means of which its central cylindrical portion 24 is suspended from the ring 14. This cylindrical portion 24` has a cylindrical axial aperture 25 therein, the lower end of which is closedby a cap 26. A bearing sleeve 27 serves as a lining for the upper end of the cylindrical aperture 25 and a fiat disk or plate 28 is positioned in the lower end of this aperture which flat plate overlies the upper end of an adjusting screw 29 which may be utilized to adjust the position oflate 28 within the cylinder 25. The sleeve 2 tapers upwardly interiorly and fits closely around, at its upper end, a cylindrical cap 30, the lower end of which rests upon the disk 28 and which has an axial conical socket 31 therein to receive the conical lower end of the gyratory shaft 32. As the shaft gyrates the cap also has a gyratory motion, to have a full bearing against sleeve 27 on the side which bears the pressure. A dust excluding ring 24 slidably rests on the upper surface of member 24 and moves laterally with the cap and shaft. This ring prevents dirt and dust from penetrating into the recess containing cap 30. Shaft 32 extends substantially vertically of the machine and its upper end extends into a cylindrical aperture 33 of sleeve 34 which is rotatably supported in a bearing B mounted inthe top of the casing. The cylindrical aperture 33 is eccentric relative to the cylindrical outer' surface of sleeve 34 so that the sleeve has a thin walled side, as shown in Figure 1.

The bearing B has a cylindrical central portion 35 provided with a cylindrical axial recess to receive the sleeve 34 and an outer shell 36 having an external spherical bearing surface which rests a ainst concentric spherical bearing surfaces ormed on the .1nside of the cap 15I and the adjacent port1on of the upper end of cylinder 10. The bear-l ing B is ifree to swivel therefore relatively to the casing, having in reality a ball and socket connection thereto, but to prevent rotation in the horizontal plane of the bearing relatively to the casing a key 37 1s provlded,

this key having .its shank extending into a recess in the shell 36 and its outer end extending into a groove formed partially 1n the ca l5 and partially in the cylinder 10. This ey is rotatable about its. horlzontal axis and does not hinder the swivel action of the bearing in its seat.

The sleeve 34 is supported at its lower end 'bearing remaining upon an annular shoulder 38 on the inner surface ofthe axial opening through the cylindrical portion 35 of the bearing. The inner and outer walls thereof on the thin walled side are provided with a series o f lnclined grooves 39 and 40 respectively, these grooves extending substantially half way around the sleeve. A small conduit or port 41 may `connect the lowermost groove of the outer series with the inner surface of the sleeve. A secondI conduit 42 formed therein brings the interior of the sleeve into communication with an annular chamber 43 in the bearing B, which chamber communi- Cates in turn, by means of a duct or conduit 44, with the interior of a large deep oil receptacle or container 45 firmly fixed ou shaft 32 below the bearing. The wall of the container 45 extends ya considerable dist-ance above the lower end of the bearing sleeve 34 and its upper edge is inturned, as at 46, the diameter of the opening across the top of the container being as small as possible, in

view of the necessary'clearance which must be left between its edge and the outer surface of the cylindrical portion 35 of the bearing, due to thel fact that relative mo'vement of the container 45 and bearing B occurs in the operation of the machine, the

container moving with the shaft 32 and the stationary, being sup.-

ported by the casing.

A pulley 47 is rlgidly secured to the upper end of the sleeve or eccentric 34 and is adapted to receive a belt driven by suitable power means to cause the rotation of the eccentric and the gyration of the shaft. When in operation the shaft will .gyrate about a point 48, which is the point of in-A tersection of the axis of the shaft with the a plane of the upper end of bearing 27. The belt bearing surface of pulley 47 is horizontally opposite the bearing surfaces of bearing B and eccentric 34, the exact arrangement being such that the resultant of the forces exerted by the belt on the pulley, by the `bearing B on f the casing, and by the sleeve 34 on the shaft and on the bearing B, all lie substantially in the same plane, thereby avoidingfall tendency of the moving parts to bind and considerably reducing the lfrictional resistance of the machine. The inner wall 49 of the shell 36 is cylindrical and positioned between this wall and the outer wall of the cylindrical portion 35 of the bearing is an annular dust cap 50, the edges of which llO are in close proximity to the two concentric ,n

cylindrical walls referred to, to prevent dust from passing around the upper edge or container 45 and becoming mixed with the oil. The lower surface of dust cap 50, that 1s, the

surface which abuts againstthe upper edgey erably formed with a concentric spherical surface, the arrangement beingl such that 44 to the oil chamber.

the crushing jaws.

relative movement of the container and dust cap. opens no crack between these elements through which dust may enter the oil chamber.

The upper end of the cylindrical interior of the eccentric 34 is close-d by a cap 51 which is readily removable for the insertion of lubrication or for the purpose of examination. Supported on shaft 32 horizontally opposite the crushing hopper is a cone 52 which lin turn supports the movable crushing jaw or cone This cone has a separate cap portion 53 which extends -a considerable distance above the upper edge of the crushing hopper and above the lower edge of the feed opening 16. This upper portion constitutes a stirring portion which first contacts with the stone which enters through the feed openings and distributes it around evenly in a circle before it passes between the crushing jaws, and also serves to align the larger rocks or to place them on edge vertically.

An oil cup 54 secured to the casing is connected by means of a pipe 55 to the interior of cylinder 24 and lubricant may be easily inserted into the cylinder by this means to lubricate the lower end of the gyrating shaft. In the operation of the crusher vthe sleeve or eccentric 34 is rapidly rotated by power applied to the pulley 47 thereby giving the crushing cone 53 a gyratory motion in a Well known manner, and crushing rocks or ore which pass through the machine between The lower end of eccentric 34 is always submerged in oil and the inclined grooves. 39 and 40 lift this oil upwardly continuously to be collectedin the chamber 43 and to be returned through duct 40 are formed in the thin walled side of the eccentric which side is under little or no strain due to the crushing action. The thick walled side of the eccentric takes practically all of the strain as it is the wedge which forces the shaft from side to side. The grooves do not therefore cut down the area of useful bearing surface of the eccentric. The oil is continually circulated and no dust can enter the oil chamber. The cap 51 may be removed at any time even 4when the machine is operated and additional oil added. In case it is necessary to vertically adjust* the movable crushing jaw by means of screw 29 the dust cap 50 slides freely upwardly or downwardly as the case may be, without having its eliiciency as a dust guard impaired.

In case the cap 30 becomes worn the spider 13 and the shaft may be dropped and removed and cap 30 removed from the end of the shaft by inserting a screw bolt through These grooves 39 andv the threaded opening 56 in the bottom of the cap, to force it from the shaft. A new cap may be then placed on the shaft and the shaft returned to position in themachine. The crushing action takes place practically in the same plane in which the machine is supported so that crushing shocks are conveyed directly to the foundations, thereby largely eliminating harmful vibration of the machine.

In Figure 7 I have illustrated an electric motor 60 mounted upon the top of the casing and having its shaft directly connected to the eccentric. This mode of operating the Crusher involves no' intermediate connections such as a belt or pulley between the source of power and the eccentric and is especially alyantageous when electric power is availa e.

Other modifications and changes may be made by one skilled in the art to the design and arrangement of the parts of the machine within the scope of the invention, which is not limited to the embodiment disclosed.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is:

1. A gyratory crusher'including, in combination, a frame, a shaft having one end pivotally supported in said frame, a rotatable sleeve having an eccentric aperture to receive the other end of the shaft whereby rotation ofv said sleeve will cause gyration of the shaft, a bearing member mounted on the frame and free to .swivel relatively thereto,

for supporting said rotatable sleeve, and

means for rotating said sleeve.

2. A gyratory Crusher including, in combination, a frame, a shaft having one end pivotally supported in said frame, a bearing member mounted on the frame and free Vto swivel relatively thereto, said bearing memb'er having an axial cylindrical opening therethrough and a shoulder insaid opening near the lower end thereof, a. rotatable sleeve mounted in the axial opening of the bearing and resting on said shoulder, said sleeve having an eccentric aperture to receive the free end of the shaft whereby rotation of said sleeve will cause gyration of the shaft, and means for rotating said sleeve.

3. A gyratory Crusher including, in combination, a frame, a shaft having one end pivotally supported in said frame, a bearing member mounted on the frame, said member and frame having cooperating -spherical bearing surfaces whereby said bearing may have swivel movement relatively to the frame, a sleeve rotatably supported by said bearin ,the axes of said sleeve and bearing being coincident and said sleeve having an eccentric aperture to receive the free end of the shaft, and means for `rotating the sleeve whereby the shaft may be given avgyratory motion. i N

4. A gyratory crusher including, in combination, a frame, a cap removably secured to said frame, a spherical bearing surface being formed partly in said frame and partly in said cap, a bearing member having, a spherical surface seating on thei spherical bearing surface of said frame and cap, a rotatable sleeve mounted axially in said bearing and having an eccentric aperture therein to receive the free end of the shaft,

' and means for rotating said sleeve.

5.. In a gyratory crusher, in combination,

ya frame, a shaft having one end pivotally mounted. in said frame, a bearing pivotally mounted insald frame, a sleeve rotatably supported in said'bearing and 'having an eccentric aperture to' receive the free end of the shaft, and means for rotating said sleeve to give the shaft a gyratory motion.

6. In a gyratory crusher, in combination,

a frame having a spherical seating surface,l

a shaft having one end pivotally supported on said frame, a bearing member having a spherical surface seating on vthe spherical bearing surface of the frame whereby. it may have a swivel movement relatively thereto, a rotatable member concentrically mounted in said bearing and having an eccentric aperture to receive the free end of the shaft, and means for rotating said member.

7. In a gyratory crusher, in'combination, a frame, a shaft having'one end pivotally supported in said frame, a bearing member' having ,a ball and socket connection with said frame and provided with a centralv axial aperture, a member rotatably supported in said aperture and having an eccentric opening therein to receive the free end of the shaft, the cooperating bearing surfaces of the frame, bearing member, and rotatable member, being so positioned that the resultants of the bearing forces lie substantially in the same plane, and means for rotating said rotatable member.v

8. In a gyratory crusher, in combination,

a frame, a shaft having one end pivotally supported in said frame, a bearing member mounted in said frame to have swivel movement relatively thereto, a member rotatably supported axially in said bearing member and provided with an eccentric aperture to receive the free end of the shaft, a-pulley rigidly connected to said rotatable member and having its belt bearing surface concentric with and opposite the bearing surfaces of the rotatable member.

9. In a gyratory crusher, in. combination, `l a frame, a shaft having one end pivotally supported in said frame, a bearing member mounted in said frame'v to have swivel movement relatively thereto, a member rotatably supported axially in said bearing member and provided with an eccentric aperture to 05 receive the free and of the Shaft, a Pune? rigidly connected to said rotatable member and having a belt bearing surface, the belt bearing surface ofthe pulley and the bearing surfaces of the rotatable member being a frame having a spherical bearing surface,

a shaft having one end pivotally mounted in said frame, a bearing member having a spherical surface seating on the spherical surface of said frame and having an axial aperture, a member rotatably mounted in said aperture and provided with an eccentric opening to receive the free end of said shaft, a pulley rigidly secured'to said rotatable member and having a belt bearing surface, the belt bearing .surface of the pulley and the cooperating bearing surfaces of the frame bearing member and rotatable member, being so arranged that the resultante of i the forces exerted respectively by a belt on the-pulley, by the bearing member on the frame, and by the rotatable member on the shaftand bearing member, lie substantially in the same frame.

i 11. A gyratory crusher including, in combination, a vert-ical shaft adapted for gyratory motion, a bearing, a rotatable sleeve mounted in said bearing and having an eccentric aperture to receive the free end of the shaft, an oil containing receptacle 100 mounted on said shaft and extending above the lower end of said rotatable sleeve so that the latter is submerged in oil, and means for rotating said sleeve.

l2. A binati'on, a vertical shaft adapted for gyratory motion, a bearing, a sleeve rotatably mounted in said bearing and having an eccentric opening therein adapted to receive the ifree end of the shaft, said sleeve having 110 an inclined groove in its outer surface, an 011 contalning receptacle mounted on the Vshaft the interior of which is in communication with said groove, and means forrotating said sleeve.

13. gyratory crusher including, in combination, a vertical shaft ada ted for gyratory motion, a bearin a cylindrical member rotatably mounte in said bearing and having an eccentric cylindrical opening 120 therein adapted to receive the free end of the shaft, said 'member having aninclined groove in its inner surface, an oil containmg receptacle mounted on the shaft for feeding oil to the lower end of the rotatable 195y llember, and means for rotating said memr. 14. A gyratory crusher including, in combination, a shaft adapted 4for gyratory movement, a cylindricalmember supported l gyratory crusher including, in com- 105 for rotation about its axis, andprovided with an eccentric cylindrical opening to receive the free end of the shaft, said member having an inclined oove in its in er sur?" mounted in said bearing and having an eccentric cylindrical opening therein adapted to receive thegfree end of the shaft, said sleeve having' a plurality of inclined grooves on one of its bearing Surfaces, an oil containing receptacle mounted on the shaft the interior of which is in communication with the lower groove of the series, and means for rotating said sleeve.

16. A ,gyratory crusher including, `in combination, a vertical shaft adapted for gyratory movement, a bearing, a sleeve rotatably mounted in said bearing and having an eccentric opening therein to receive the free end of the shaft, said sleeve having an inclined groove on the outer surface of its thin-wall side, an oil containing receptacle mounted on the shaft the interior of which is in communication with the said groove, and means for rotating the sleeve.

17.. A gyratory crusher including, in combination, a vertical gyratory shaft, a bearing, a sleeve rotatably mounted in said bearing and having an eccentric opening therein to receive one end of the shaft, said sleeve having a plurality of inclined grooves on the inner surface of its thin-wall side, an

`oil containing receptacle mountedon the shaft the interior of which is in communication with the lower groove of the series, and means for rotating the sleeve.

18. A gyratory Crusher including. in combination, a vertical shaft adapted for gyratory movement, a bearing, a sleeve rotatably mounted in said bearing and having an eccent-ric opening therein adapted to receive the free end of the shaft, an oil containing receptacle mounted Von the shaft in which the lower end of the sleeve is submerged, and oil grooves in the bearing surface of the sleeve and in the bearing member whereby oil may be circulated in a closed circuit from the oil receptacle, along said bearing surface, and back to the oil receptacle.

19. A gyratory crusher including in combination, a frame, a crushing cone movably supported in said frame, and a crushing hopper surroundin said cone and secured to the frame, said four sections, two of said sections being Wedge shaped with their longitudinal axes vertically disposed, and one 0f said wedges opper being formed inr being upwardly directed f and the other downwardly directed. y

2G. A gyratoryv Crusher comprising in lcombination, a vertical gyratory shaft, an

eccentric sleeve for gyrating the shaft and means for lubricating said sleeve including an oil receptacle fast on said shaft and surrounding thc lower end of the sleeve.

21. A gyratory crusher comprising, in combination, a shaft supported at one end for gyratory motion about a point, a rotatable eccentric sleeve for imparting gyratory motion to said shaft, a bearing for said Sleeve, and means for lubricating said eccentric sleeve including an oil receptacle fixed on said shaft and having an open mouth, said receptacle having a cover rest- Y `ing on the edge of the receptacle, the bearing 1 tends upwardly between the downwardly extending portions of the bearing member, and a dust cap for said receptacle consisting of an annular member having its lateral edges slidably fitting against the adjacent walls of the bearing and its bottom resting on the edge of the oil receptacle.

23. A gyratory crusher, comprisin in combination, a frame, ashaft supporte for gyratory motion about a point, a rotary eccentric sleeve for imparting gyratory motion to said shaft, a bearing member supporting said sleeve and having two downwardly extending portions the adjacent walls of which are cylindrical'and coaxial, and means for lubricating said eccentric sleeve including an oil receptacle fixed on said shaft, the cylindrical wall of which extends upwardly between the downwardly extending portions of the bearing member, and a dust cap for Said receptacle'consisting of an annular member vhaving its lateral edges slidably fitting a ainst the adjacent walls of the bearing an its bottom resting on the edge of the oil receptacle, -said bottom having a spherical bearing surface centlrefd about the center of gyration of the s a 24:. A gyratory crusher, comprisin in .Y

combination, a frame, a shaft' supporte for gyratorymotion about a point, a rota eecentric sleeve for im artmg gyratory motion of said shaft, a aring member supporting said sleeve and having a downward- -ly extending portion, the inner wall of which is cylindrical, and means for lubrieatingsaid eccentric sleeve including an oil receptacle fixed on said shaft, the cylindrical wall of which extends upwardly above the lower end of sai-d sleeve, anda dust cap for said receptacleconsisting of an annular member having its circular outer edge slidably fitting against the cylindrical wall of the bearing and its bottom slidably resting on the edge of the oil receptacle.

25. A gyratory crusher comprising in combination, a shaft adapted for gyra-tory movement about a point adjacent its lower end, a rotatable eccentric engaging the upper end of said shaft, and means for o iling the bearing surfaces of said eccentric including an oil receptacle mounted on the shaft the. walls of which extend upward above the lower end of the eccentric, and means fixed against lateral movement for closing the mouth of said receptacle against the entrance of dust.

26. A gyratory crushing machine including in combination, .a frame, a vertical shaft adapted to be gyrated above a point adjacent its lower end, a cap removably secured to said lower end of the shaft and arranged to transmit the weight of the shaft to the frame and also to bear the lateral thrust of the shaft on the frame.

27. A gyratory crusher including in combination, a frame, a verticalshaft mounted in said frame and adapted to be gyrated about a point adjacent its lower end, a cap removably secured to its lower end and .ar-

- ranged to transmit the weight of the shaft to the frame and to transmit the lateral thrust of the shaft tovthe frame, said cap having a cylindrical outer surface.

28. A gyratory crusher vincluding in` combination, ajframe, a vertical shaft mounted in said frame and adapted to be gyrated about a point adjacent its Alower end, a cap removably secured to its lower end and arranged to transmit the weight of the shaft to the frame and to transmit the lateral thrust of the shaft to the frame, said cap having a cylindrical outer surface and a tapered axial recess to receive the end of the gyratory shaft.

29. A cap for the end of a gyratory crusher shaft having. a recess to receive the end of the shaft, a surface to transmit lateral thrust of the shaft to a frame, and a surface to transmit the weight of the shaft to a frame, said cap being removable from the shaft.

30. The combination with the shaft of a gyratory crushing machine having a tapered end, of a. protective cap having surfaces for transmitting lateral thrust and vertical thrust from the shaft to the frame, said cap being removable from said shaft.

31. The combination with the shaft of a gyratory crushing machine, of a protective cap for the end of said shaft said caphaving a recess to receive the shaft," a cylindrical outer surface and an end bearing surface, said cap being removable from the shaft and having an aperture in its end for the insertion of a tool to contact 'with the nd of the shaft to effect its separation thererom.

32. A gyratory crushing machine including in combination, a frame, a crushing cone movably supported in the frame, and a crushing hopper surrounding the cone and secured to the frame, said hopper flaring toward both ends from an intermediate point and said' hopper being divided circumferentially into a plurality of sections, one of said sections being wedge-shaped for the purpose set forth.

In testimony whereof I hereunto alix my signature. v

WILLIAM STEVENSON WESTON.

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