US839103A - Crushing-machine. - Google Patents

Description

116.839,103.- PATBNTED-'DEG.25,1906. M. G. BUNNBLL.

- GRUSHING MACHINE.

` APPLICATION FILED 00T,24, 1900.

4 sums-SHEET 1.

No. 839,103.- PATENTBD DBO. 25, 190e.

TM. G. BUNNBLL.

L5 with comparatively little wear to reduce the yzo of action, particularly when it is found de- 45 pitman above the eccentric device, and thus UNITED sTATns` PATENT onnron.

MORTON BUNNLL, OF CHICAGO, ILLINOIS, ASSIGNOR TO WESTERN WHEELED SCRAPER- CO., OEAURORA, ILLINOIS.

QRUSHlNG-.NIACHINE- N0. 839,103. Specification of Letters Patent. Patented Dec. 25, 1906. Continuation of application Serial No. 9,870, filed lviarch Z3, 1900. This application filed October'Zfl, 1900. Serial No.'34.,105.

-To a/ZZ whom it may concern,.- ment, and organization of parts and new Be it known that I, MORTON Gr. BUNNELL, mode of operation results in permitting praca citizen of the United States of America, tically any degree of speed on the part of a and a resident of Chicago, county of Cook, jaw having a movement found to be highly 5 State of Illinois, have invented certain new 1 satisfactory and effective and in a conse- 6o and useful Improvements in Crushing-Maquent improved and highly-efficient crushing chines,ofwhichthe followingisaspeciiication. action; and another feature of my invention My invention relates to that particular l| consists in providing a supporting-bearing class of crushing-machines known as jawfor the movable jaw, preferably of such charro ierushers. acter as to leave the jaw free to be raised and 6-5' Objects of my invention are to provide a in then maintaining the jaw in place upon simple, compact, and an easy-running crusher such bearing during the crushing action by capable of high speedl and rapid crushing positioning the pivotal or hinge-like connecaction and capable of continuous operation tion between the pitman and the toggle-arm at avpoint on a level, or substantially so, with 7o the upper edge of the crushing-face of the movable jaw, so as to permit the thrust or reaction in the crushing-hopper to be eX- erted in a direction below or practically benumber of bearing-points, so as to reduce friction, and to avoid the use of certain objectionable features heretofore considered desirable and necessary; to insure'certainty sirable to drive the machine at high speed,

and to so distribute the weight and strain as -to reduce vibration and danger of breakage,

and to provide certain details and features z5 of improvement `tending to increase the general efficiency and to render a machine of this character serviceable and comparatively reliable for all kinds of work., j

` My invention relates to crushing-'machines 3o of that particular type in which a crushinghopper is formed in part by a movable jaw having a pivotal or hinge-like connection,

through the medium of a rigid toggle-arm,

with a pitman fulcrumed at its upper end 3 5 upon a swinging yoke and actuated at its lower end by an eccentric device 5 and in a machine of the above general character an important feature of my invention consists of a movable crushing-jaw having a rigid 40 toggle-arm and of a vertically-disposed pitman having its upper end tied to the swinging yoke and` its lowerend actuated by an eccentricv device, together with means for tying the movable jaw to the portion of the man and so that the jaw, although, as stated, being preferably free to be raised, is effectually prevented from jumping up or leaving its bearing while the machine is in operation;

and a further feature of my invention con- 8o sists of a roller or equivalent member interposed between the bottom. of the movable jaw and a portion of the body-frame, the said roller or like device thereby constituting both an antifriction supporting-bearing and 8 5 rolling fulcrum upon which the jaw moves back and forth and tilts or oscillates when actuated by the pitman; and still another feature of my invention consists of the rovision of means passing through the mi dle 9o or intermediate portion of the pitman and connected with the movable jawin such manner as to keep the pitman in pivotal engagement with the rear end of the toggle-arm, saidV arm'being rigidly connected with the 95 back of the movable jaw, and said means being preferably adjustable for the purpose of taking up wear and lost motion; and another feature of my invention consists in the provision of means for taking up wear between roo the swinging yoke and the body-frame and between the swinging yoke and the upper end of the pitman, so as to prevent lost motion and permit the machine to beun atany keeping the pitman in pivotal engagement with the rear lend of said toggle-arm, whereby the said jaw swings or oscillates relatively to the pitman and is also actuated or moved j 50 bodily `in both directions-that is to say, to desired speed, and in addition the specific 105 ward and away from the other jaw of the means for tying the movable jaw and pitman hopper-by the middle or intermediate porl together and for tying the ends of the swingtion or by the upper end portion of a pitman ing yoke to the body-frame and upper end of fulcrumed at its upper end and actuated at the pitman, consisting of U-bolts employed,

55 its lower end, which construction, arrange- 1 preferably, in the manner hereinafter eX- rio low the connection between the jaw and pit- 7 5 j groove c in the pitman.

plained, also constitute valuable -features of my invention.

In the accompanying drawings, Figure l is a plan of a aw-crusher embodying the principles of my invention. Fig. 2 is a longitudinal section on line X X in Fig. l. Fig. 8 is a transverse section on line Y Y in Fig. l. Fig. 4 is a plan of the movable jaw and pitman, the latter being in horizontal section. Fig. 5 is a plan of the rear portion of the yoke, showing the adjacent portion of the pitman in section. Fig. 6 is a plan of the forward portion of the yoke, the adjacent portion of the frame being shown in section. Fig. 7 is a diagrammatic view illustrating different positions of the parts and showing how the roll provides a shifting fulcrum for the jaw.

As thus illustrated, my invention comprises a frame or body A, adapted to provide a stationary support for the various operative parts. The stationary jaw B is rigid with the forward portion of the frame. 'lhe movable jaw B is arranged in opposition to said stationary jaw, and together the two jaws form a hopper for receiving the material to be crushed. A. vertically-disposed pitman C, fulcrumed at its upper end and actuated at its lower end by an eccentric D, is arranged in rear of said movable jaw. Ihe toggle-arm B2 is rigid with said movable jaw. rlhe rear end of said arm is formed with a cylindric portion B3, extending transversely across the machine and engaging a U-bolts E, extendin through the pitman, are employed for ho ding or binding the jaw and pitman together, it being observed, however, that the joint is of a pivotal or toggle-joint nature. The jaw is preferably supported by an antifriction-bearing-as, for example, by arranging a roll F between its bottom and the frame. The said roll being interposed between the flat surface b on the jaw and the flat surface e on the frame serves as a sort of shifting fulcrum and supports the jaw for a bodily forward and back vibratory movement practically without friction. As a means for providing a fulcrum for the pitman I connect the upper end of the latter with the frame by means of a swinging yoke G. The cylindric forward portion g of this yoke is j ournaled in a bearing a rigid with the frame, and the cylindric rear portion g of said yoke is seated in a groove c on the pitman. The yoke and pitman are secured together by U-bolts H, and U-bolts g2 are provided for takin@ up wear, which is only very slight. It will lbe observed that the jaws are each provided with a removable die and that each die is backed by one or more shims, preferably wedge-shaped in form. The dies and shims can be retainedin place by bolts I, having wedge-shaped heads i, the bevel being preferably en the under side, as shown. With this construction the dies can be readily removed, and by the removal or insertion of shims the distance between the jaws vcan be varied according to the character desired for the product. The wedge-shaped shims permit the angle of the aws to be varied according to the character of the rock, ore, or other material to be crushed.

In operation the pitman is reciproeated by the eccentric, and as it is fulcrumed upon the yoke it acts as a lever. The vibratory movement of the pitman operates to alternately thrust the jaw forward and draw it back and to in this way effect the desired crushing aetion in the hopper. It will be observed that the jaw, although supported by a roll which leaves it free to rise, is held down by the resistance offered by the rock, the lines of resistance passing below the toggle-joint. In this way the jaw is self-controlled and capable of rapid vibration without danger of jumping up or leaving its cally without friction. that the yoke provides a fulcruni at each stroke of the jaw, the side portions of the yoke with the particular toggle arrangement shown sustaining a tensile strain when the jaw is advanced, and these same side portions being subject to some endwise compressive strain when the jaw is retracted and the movement of the yoke and roll com bining to give the jaw a combined bodily forward-andback and vibratory movement.

It will be readily understood that the bearings for the eccentric shaft can be of any known or approved form' and that the machine can be driven by an engine or other suitable power. Even when driven at high speed there is no lost motion and comparatively little vibration, the pivotal connections all being of such character that slight wear can be readily taken up and as to make it unnecessary to employ connections between the movable jaw and body-frame for retracting the jaw and holding the parts together.

With further reference to the antifrictionbearing it will be observed that the roll F is preferably confined between two depending lips on the bottom of the jaw. In this way the roll is prevented from being displaced. Also and as a further advantage of my simplified and improved construction the parts can be readily assembled, and each part can be readily removed for the purpose of repair or substitution.

By referring to Fig. 7 it will be seen that the roll F shifts slightly during the vibration of theI jaw. It will also be seen and, as previously stated, that the general trend of the lines of resistance is below the axis about which the jaw swings, or, in other words, that no lines of resistance are liable to occur in such direction as to pass above such axis. In this way or by placing the toggle-joint high, so that all or at least most of the resist- It will also be seen bearing and praetiback and forth withrelation to said bearing.

In this way, as'previously described, the jaw is arranged for a vibratory movement practically without friction. Although supported in such marmer thatI it can be instantlyT raised or removed from its bearing, the jaw is nevertheless maintained in rm contact with itsbearing, as the actuating and other f movable parts coperate to hold it down in `to the upper'end of the pitman.

crushing the ro ckor ore,

place upon said bearing. It willalso be observed that the swinging yoke is lirmly tied at each end-that is to say, thatits forward end is secured or tied to the bed or body frame and that its rear end is secured or tied be seen that the jaw is firmly tied to said pitman by devices which are 'adjustable for the purpose of taking up wear, and thereby-preventing lost motion. In this way the eccentric and pitman actuate the jaw in both directions, the rear cross-bar of the yoke serving as a fulcrum for .the pitman at both the forward and back strokes of the jaw. v Thus positively actuated in both directions by the pitman thejaw is made cap able of free and unhindered movement b ack and forth up on a single supporting-bearing. Furthermore, and as previously explained, lthis arrangement vmakes it unnecessary to resort to independent devices or means for retracting the jaw. For this reason the eccentric in thus actuating the jaw in both directions will not be subject t'o uneven wear and will not become flattened. The portion of .the pitman above thdeccentric does all of the work. The roll upon which the jaw is supported acts as a rolling fulcrum-for the purpose Vof supporting the jawin its combined -vibratory and bodily forward and back movements. I n other words, the movable jaw and its rigid toggle-arm serves as a lever for the pitman applying the power tosuch lever at its rear end an the roll serving as a rolling fulcrum upon which this lever is supported. Thus it will be seen that the roll or rolling fulcrum is not only ofl a character to provide a frictionless bearing for the jaw in its forward and back movements, but also provides a fulcrum upon which the jaw may tilt or rock while it travels back and forth. In this way the roll serves as a rolling fulcrum and antifrictionbearing, and `it .is for this reason that it is thej aw B', although It will also.

' and actuating termed va rolling fulcrum. vThe movable jaw and its rigid arm constitute a lever-like .crushing member. .A

Withfurther respect to the .desirability and advantage of combining high -speed -with l an effective and satisfactory movement or motion Yon the part of the jaw without .dan- :ger `of breakage and with a good distribution of the strain and of insuring an .effective balance and .distribution of the weight of the different parts at any and all times and with any desired speed it will be observed that the pitman is not only subject to the strains incident to employing its middle or intermediate portion or its upper end portion for actuating or bodily moving the movable crushing-j aw in both directions or in all of the di'- rections of its motion, the jaw being connected to swing or oscillate relatively to the pitman, but is also by reason of its being fulcrumed at its upper end and actuated at its 'lower end subject to the weight y.or compressive strain imposed upon it by the swinging yoke,l the movable crushing' aw thereby having a pivotalconnection with and being actuated bodily in opposite directions or in all necessary pitman between its upper and its lower or actuated end, yor in any event by that portion which is above the eccentric device, thus imposing the entire work of manipulatingl or opera-ting lthe toggle-joint the Vmov-able aw in all of the directions of its motion upon some portion or .portions of a pitman which is actuated. at a point below ysuchportion or portions and which is fulcrumed at a point .above the eccentric dev-ice by which it is actuated at its lower end, and as far as the broad feature of employing that portion of the pitman which is above the eccentric device for both manipulating the toggle-joint or pivotal or hinge-like connection between ythe pitman and movable jaw and actuating said movable jaw in all of the directions of its motionit being obvious that the said pivotal or hinge-like connection or engagement between the pitmanand movable jaw is ,of a togglelike character, inasmuch as it constitutes a joint or point of articulation intermediate of the face of the jaw and the fulcrum-point vof the pitman-it is obvious that various devices may be employed for connecting or tying the movable jaw to some portion of the pitman above the eccentric device, so.y as to.

directions by that portion of the or fulcrumed end j IOO IIO

cipal objects of In invention to said movable jaw, the upper end or fulerum of the pitman than -upon the rock or other -powerful leverage` for actuating the jaw by -Ineans of .a

Vtuate i at its lower end trie device.

Ithis character can be :the weight that the stantially on a level ing one end tied to AvAiLAeL-E copy without iny anyway departing from the spirit of my invention.

he arrangement ofthe engagement or connection between the pitman and the end B3 of the arrn of the movable jaw at a point on a level or substantially on a level with the top of the crushing-face of and considerably nearer point of pivotal its lower or actuated end regardless of the character of the means for supporting the movable jaw, constitutes an important feature of the invention, as it combines the advantages of preventing any tendency on the part of the movable jaw to rise while-acting material and of a pitman C, which is fulcrumed at er end upon a swinging yoke and acby a suitable eccenits-up It `is obvious that a crushing-machine of whiehthe motive power work. It is desireonsequently, to'insure a high degree of of the power as possible in the real work of .exerting a crushing action on the rock. In

other words, I aim to reduce the i-nternal resistanee, so to speak, of the crushing-machineas' much as possible. Therefore I have, as explained, made it one of the prinso connect erent parts and distribute result will be a perfectly armonious organization and operation and a consequent increase in efficiency. What I claim as my invention is- 1. A j aw-crusher eomprisinga bed or body,

and balance the di a hopper for-med in part by a movable jaw, a

supporting-roll inter osed between the bed or frame and the bo y of the said jaw, a pitman for actuating said jaw. and connected with thelatter at a point practically or suband thereby above or substantially above the lines of resistance, and a swinging yoke havthe pitman and the other end tied to said bed or frame, said yoke thereby adaptedto sustain both tensile and endwise compressive strainsduring the operation of the erusher, and the roll, yoke and pitman combining to :give the jaw a combined oseillatory and bodily forward-and-baek movement, the said lroll constituting an antifriction supporting bearing upon and about which the movable jaw is tilted or oseillated by the said pitman.

2. A crushing-machine comprising a movable jaw, a vertically-reciprocating pitman adapted and `arranged for actuating said j aw in both directions, said jaw having a rigid driven by any suitable Imotive power. In such ease the crushin -y -machine constitutes4 the connection or medium through and by :is converted into useful xable, efficieney-that is to say, to utilize as much said movable with the top of the jaw,I

arm swingingly connected at its end to sai( pitman, a swinging yoke having one end tie( to said pitman and the other end tied to thi crusher frame or body, so as to provide thi pitman with a fulcrum at both forward an( back strokes of the jaw, adjustable bearing: for taking up wear between the pitman anc the jaw and yoke, so as to prevent lost mov tion, and means for actuating said pitman the side portions ofthe yoke thereby adapted to sustain both tensile and endwise compressive strains during the operation of the crushing-machine, and the means for maintaining the connection between the pitman and the said arm being applied to the pitman at a oint above the said means for actuating the atter, the point of engagement between the said arm and pitman constituting an axis about which the movable jaw and the pitman have a relative swinging motion.

3. A crushing-machine comprising a suitable bed or body structure, a stationary jaw, a movable jaw, arranged opposite said stationary jaw, a rolling fulcrun'i upon which jaw rests, a vertically-reciproeating pitman actuated at its lower end by an eccentric, a toggle-arm rigid with said movable jaw and journaled in the pitman at a point substantially on a level with the uppe'r edge of the face of said jaw, and a swinging yoke connecting the upper end of the pitman end of said bed or body structure.

4. A crushing-machine comprising a suitable bed or body structure, a stationary jaw, a movable jaw arranged opposite said stationary jaw, a vertically-reci V)rocating pitman actuated at its lower en by an eccentric device, a single bearing for said movable jaw consisting of a rolling fulcrum interposed between the bottom of the jaw and a portion of said bed or body structure, a toggle-arm rigid with said movable jaw and engaging the pitlnan at a point substantially on a level with the upper edge of the face of said jaw, clips extending through the pitman and binding the toggle-arm and pitman together, a swinging yoke connecting the upper end of thepitman with the forward portion of said bed or body structure, and clips extending through the pitman and binding said yoke and pitman together.

5. A crushing-machine comprising a suitable bed or body structure, a stationary jaw, a movable jaw arranged o1 osite said stationary aw, a single bearing iiir said movable jaw consisting of a roll interposed between the bottom of the jaw and a portion of said bed or body structure, a vertically-reeiproeating pitman actuated by an eccentric device, a swinging yoke having one end tied to the upper end of said pitman and the other end tied to the forward portion of said fran'ie or bodystrueture, and a toggle-arm rigid with said movable jaw and connected with tuting a lever-like crushing member,

` with `tionary jaw, a single means for tying vman together, said means having a pivotal 10. A crushing-machine comprising a stationary 'aw and a v mov-able jaw, a togglearm rigid with said movable jaw, cally-reciprocating pitman actuated by an eccentric device, said pitman having between its upper and lower ends a point of connection with the rear end of said toggle-arm, means Jfor tying the movable jaw and pitman together and pitman and the toggle-arm, said means having a pivotal connection with the toggle-arm and extending through and engaging thef back of the pitman above the said eccentric device, a swinging yoke having one end tied to said pitman and the other end tied to the stationary jaw, and suitable devices for taking up wear at each end of said yoke.

1 1. A crushing-machine comprising a bodyframe, a vertically-disposed pitman, a stationary crushing-jaw, a movable jaw supported for bodily movement toward and away from the stationary jaw and provided with a rigid arm pivotally engaging said pitman, an eccentric device for actuating the lower end of said pitman, a swinging yoke having one end tiedV to the body-frame and the other end tied to the upper portion of said pitman, and means extending through the pitman above the eccentric device to bind the movable jaw and pitmantogether, whereby the movable jaw swings about its point of pivotal connection with the pitman the pitman at a point .substantially on a level with the upper edge of the face of the jaw.

A crushing-machine comprising a suitable bed or body structure, a stationary jaw, a movable jawarranged opposite said stabearing for said movable jaw consisting of a rolling fulcrum interposed between the bottom oi' the jaw and a portion of said bed or body structure, a vertically-reciprocating pitmanactuated at its lower end by an eccentric, and a toggle-arm rigid with said jaw and pivotally connected with said pitman at a point substantially on a level with the upper edge of 'the 'face of said jaw7 whereby the .pitman and toggle-arm cooperate to prevent the movable jaw from rising from its bearing. p

7. A crushing-machine comprising a suitable bed or bodyy structure, astationary jaw,. a movable jaw arranged opposite said stationary jaw, a Asingle supporting-bearing for said movable jaw consisting of a cylindricrolling fulcrum interposed between the bottom of the jaw and said bed or body structure, a vertically-reciprocating pitman actuated at its lower end by an eccentric, and a togglearm rigid with said movable jaw and pivotally connected with the upper -portion of said pitman.

8. A crushing-machine comprising a suitable bed or body structure, a stationary jaw, a movable jaw arranged opposite said stationary jaw, a single supporting bearing or ulcrum upon which said movable jaw rests, said jaw being left free to be raised, -a vertically-reciprocating pitman,l an eccentric for actuating said pitman,l and a toggle-arm rigid with said jaw, the jaw and arm constiand the toggle-arm being pivotally connected with the pitman ata point between the upper and lower ends oi the latter, and at a point vsubstantially on a level with the upper edge of the face ofsaid jaw, whereby the pitman and toggle-arm cooperate to maintain the jaw in place upon said Julcrum during the crushing operation.

9. In a crushing-machine, the combination of a suitable body-frame, a jaw rigid with said bod -rame, a movable jaw yopposed to said stationary jaw and provided a rigid rearwardly-extending togglearm, a vertically-reciprocating pitman actuated at its lower end by an eccentric device, said pitman being provided between its upper and lower ends with a bearingv adapted to engage the rear end of said toggle-arm, the movable `iaw andpitthe middle or intermediate portion of a pitman lulcrumed at its upper end.

frame, a stationary crushing-jaw, a movable crushing-j aw supported for bodily movement toward and away from the stationary jaw and provided with a rigid arm, a pitman fulcrumed at its upper end and actuated at its lower end by an eccentric device, and means extending through and engaging the back of said pitman above the eccentric device to keep the end of said arm in pivotal engagement with the face of the pitman, whereby the movable jaw swings relatively to said pitman and is actuated in all of the directions of its motion yby the portion of the pitman having pivotal connection with the end of said arm.

13. A crushing-machine comprising a bodyframe, a stationary jaw, a movable crushingjaw provided with a rigid arm, a pitman actuated at its lower end, means extending through and engaging the back of said pitman between its upper and lower ends, and at a point above the means for actuating the pitman, to keep thesaid end of said arm in pivotal engagement with the face of the pitman, a swinging yoke having one end tied tothe body-iframe, and U-bolts for tying the other end of the yoke to the upper end of the pitman, said bolts extendingthrough the upper portion oi the pitman.

connection with the toggle-arm and extending through and engaging the back of the pitman above the eccentric device, and a swinging yoke having one end tied to the u er end of said pitman and the other end c tied to the body-trame.

a verm-- for taking up wear between the and is moved bodily in both directions by 1 2. A crushing-machinecomprising a bo dy- IOO rio

14. A crushing-machine comprising a bodyframe, a stationary crushing-jaw, a movable crushing-jaw provided with a rigid arm, a swinging yoke, a pitman fulcrurned at its upper portion upon said yoke and actuated at its lower end, and U-bolts for keeping the end of said arm in pivotal engagement with thc pitman, said bolts extending horizontally through the pitman above the point at which the latter is actuated, and said yoke having its opposite ends tied respectively to the bodyframe and the upper end of the pitman, whereby the said movable crushing-j aw is actuated in all ofthe directions of its motion by that portion of the pitman which is tied by said U-bolts to the end of said arm.

l5. Acrushing-machine comprising amovable crushing-jaw tied to and having' a direct pivotal connection with, and actuated bodily in opposite directions by, a pitman fulcrumed above and actuated at apoint below, the jaw thus actuated being adapted to swing relatively to the pitman during the operation of the machine, said pivotal connection or axis about which the jaw and pitman have a relative swinging motion being above the point at which the pitman is actuated.

16. A crushing-machine comprising a movable jaw having a direct pivotal engagement with, and actuated in all of the directions of its motion by, a pitman ulcrumed at or near its upper end and actuated at its lower end., the jaw thus actuated being adapted to swing relatively to the pitman during the operation of the machine, said pivotal engagement or axis about which the jaw and pitman have a relative swinging motion being above the point at which the pitman is actuated.

' 17. A crushing-machine comprising a suitable body-rame, a jaw rigid with said bodyframe, a movable jaw opposed to said stationary jaw and provided with a rigid rearwardly-extending toggle-arm, a verticallyreciprocating pitman actuated at its lower end by an eccentric device, said pitman being provided between its upper and lower ends with a bearing adapted to engage the rear end of said toggle-arm, means for tying the movable jaw and pitman together, said means having a pivotal connection with the movable crushing-j aw and extending through and engaging the back of the pitman above the eccentric device, and a swinging yoke having one end tied to the upper end of said pitman and the other end tied to the body-frame.

18. A crushing-machine comprising a movable jaw provided with a rigid rearwardlyextending toggle-arm, a vertically-reciprocating pitman, a suitably-mounted swinging yoke having one end tied to the upper end of said pitman, an eccentric actuating the lower end of said pitman, the said pitman being thereby subject to the endwise compressive strain imposed upon it by the weight ofsaid yoke, the upper portion of the pitman having a pivotal engagement or connection with the rear end of said toggle-arm, and means for tying the movable jaw and )itman together, said means being removablT secured. to the portion of the pitm an above the eccentric device, whereby the said movable jaw swings relatively to the pitman and is actuated in all ot the directions of its motion by that portion of the pitman above the said eccentric device.

19. A crushing-machine comprising a suitably-supported movable aw provided with. a rigid arm, a swinging yoke, a pitman having its upper end iulcrumed upon the swinging end portion of said yoke, an eccentric device actuating the lower end of said pitman., and means for tying the jaw and pitm an together, the end of said arm being held in pivotal engagement or connection with the pitm an at a point substantially on a level with the top of the crushing-face of said jaw, whereby, in the main, the-crushing action docs not tend to lift the jaw, and whereby the said jaw swings relatively to the pitman and is actuated in all ofthe directions of its motion by that portion of the pitman above the said eccentric device.

20. A crushing-machine comprising a suitably-supported movable jaw provided with a rigid arm, a pitman actuated at its lower end by an eccentric device, and a swinging yoke upon which the upper end of the pitman is fulcrumed, the end of said arm having a pivotal engagement or connection with the pitman at a point nearer the latters upper end than its lower end, and at a point substantially on a level with the top of the crushingface of said. jaw, whereby the said jaw is su bstantially free from any tendency to rise or swing upwardly about its axis or point of pivotal connection with the pitman during the operation of the machine.

21. In a crushing-machine, the combination oi crushing means including a pair of jaws, and operating means for producing relative movement between said jaws, said operating means including a pitman, an eccentric ior actuating the lower end of said pitman, means including a swinging togglearm for directly tying and connecting the upper portion of the pitman to one jaw, a swinging yoke for tying the up er portion of the pitman to the other jaw, tlrie said pitman being adapted to tilt relatively to both of said jaws, and that portion of the pitman above the said eccentric constituting a power-transmitting connection through which all power necessary for producing said relative movement, in all of its directions, is communicated from the eccentric to the crushing means.

Signed by me at Chicago, Illinois, this 19th day of October, 1900.

MORTON G. BUN NELL. Witnesses:

ARTHUR F, DURAND, WILLIAM HEARTT.

IOO

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