US1325029A - Cutting-chain for mining-machines. - Google Patents

Description

E. C. MORGAN. CUTTING CHAIN Foa NNNING MACHINES. APPLICATION FILED SEPT. 5. 1914.

Y 'To all whom t 'may Concern EDMUND C. MORGAN, F CHICAGO, ILLINOIS. i

CUTTING-CHAIN AFOR.

Specification of Letterslatent.

Minimo-MACHINES.

Alipncationnied'september 5, 1914. serial No. 860,371.

Beit knownl that I, EDMUND C. MORGAN, a citizen of the United States, andresident of Chicago, in the county ofV Cook and State of Illinois, have invented certain new-and useful Improvements in Cutting-Chains for Minii'ig-Machines, of which the following Ais a specification.

My invention relates to improvements in cutting chains and has more particular reference to improvements in cutting chains of the type used in `mining machines.I One of the objectsof my invention isto provide an improved device of this oharacterwhich will be simple, durable and reliablein con struction, and effective and efficient 1n 'op-V oration. Other objects of my invention will appear hereinafter.

Referring to' the accompanying drawings: Figure 'l is side elevationof a" portion ofa cutting chain embodyingmy invention. A

Fig. is a longitudinal section on theline Q-2 of Fig. l. g A Fig. 3 is a transverse section on the line 3 3 of Fig. l. Y Fig. l is a. sectional view similar toFig. 3 illustrating a. 'modified' form'v of my invention. i Y Fig. 5 is a sectional view illustrating'still another modification, and Y Fig. 6 is a sectional view illustrating still another modification. Y i

It is desirable in mining 'machines to use chains having a plurality ofc'uttingbits or parts carried thereby so that as the chain travels the bits progressively cut into the mine wall. rlhe bits however are likely to-V become damaged or broken or become dull from use, and it is desirablettherefore that the `bits be quickly andl conveniently removl able and replaceable.V Inthe drawings -I- have shown severalstructures whicliembody my invention and which provide for-the con-1 venient removal ofV cuttingbits. i In the construction shofwnfthe chain isvof the side cut# ting type, that'is to say.v the cuttingV bits pro-1 Y ject laterallyk at intervals .from theside` of 1 the chain and in operationthefchain enters the wallof the mine in a directionv transversey to the line oftravel of the vchain itself@ This' chain is made upof plurality ofspaced':V

side links of each pair, as clearly shown in the sectional View of Fig. 2. The links are fastened together by means of bearing bolts 3 passed -through suitable holes in the intermediate and side links to makeup a completevch'ain. These bolts are threaded at one end and are provided with nuts 4- thereon for the purpose of holding them in position. l At their other ends the bolts are slightly enlarged as at 3a and a portion of this enlargement is flattened as at 3b and engages lugs 3 on the side links to prevent the rotation of the bolts with respect to the links. Interposed between the nuts and the side links of the chain are washers 5, preferably of the-locking type although they may be of any suitable construction for the purpose. The intermediate'links inthe present construction have lateral extensions 6 atY one side projecting preferably to a point sub-l stantially iush with then-ut ends of the bolts. These extensions 6 together With theY main portions of the intermediate links 2` are providedy with holes orV openings, preferably extending entirely therethrough, to'provid sockets for holding the Shanks of the cutting bits. The Shanks 7 of the cutting bits are preferably of rectangular section so as to prevent the rotation of the bits, and the sockets or openings in the intermediate links are preferablyV of corresponding 'sectional transverse cutting edges 9. The knifeporrtionsv 8 of thecutting bits are inclinedV at, an angle to the vlongitudinal axes ofVv rtheir shanks and these cutting portions 8" are ge'nV erally positioned in the chainl so thatthey point vin the direction in which the rchain Vt-ravels.- The sockets kin the intermediate links are-also inclined or angularly disposed so;V that they hold the bits in position to cut a kerf which is wider than thethickness of the chain, thereby readily admitting the chain into the kerf. Alternatebits are preferably-staggered or linclined in opp'osite'di rection's as shown clearly in Fig.v 3 so as to secure the proper vwidth of kerf. In the I, construction. shown, I v'provide fasteningmeans which vremovably Vhold these bitsr in place. Infnthe structure shown in Figs. land 8 the :fastening means is in the form of'a'v wedgey shaped orjtap'ered member 10 Whichs;ins'erted in afsocket 11 alongside the bitI Y Patented' Dee. 16,1919.

ioo

@ne `oflthe walls 12 of the socket isrtapered Y corresponding to the taper of the wedge member and it will be observed that the socket 11 and the wedge shapedl member converge in the direction of removal of the bit. In order to maintain vthel wedge member tightly in clamping position against thel shankof the bit, I provide means which has a tendency to constantly draw or vpull the wedge member toward the converged or smaller fend of its socket 11.V -This means, in Figs. 1, 2, and 3, consists of an elastic or spring member13- One end of the spring membe'lis fastened to the end of the extension ofthe intermediate link by means of a bolt and nut14. VThe'other end of the spring is bent around a smallheaded projection 15 on the end of the vwedge member 10. This spring exerts'a force upon the wedge member 10 tending to pull it out of its socket; consequently it' holds the bit firmly in place. It willbe noted that during the operation of the chain ,any force which tends to pull the bit out of its socketacts upon the Wedge in such amanner as to cause it' to increase its clamping effect upon the bit. Hence the greaterthe force tending the pull the bit out, Vthe greater clamping. effect the Wedge will have upon the bit. In Fig. -2 I have in-l dicated .i means by which vthe bit may be quickly and convenientlyreleased. A tool A, `such as indicated in. dotted lines in Fig. 2, has a heel A1 arranged-to press upon the outer end ofi-the wedging member 10. This tool may havea long handle .for operating it and in order to give the properrleverage itV Y ,count I provide theY bearing bolts V3 with is provided with a hooked portion A2. i This hoo-k is intended to engage a loop member l'carried by the chain adjacent each bit. In

the construction shown this loop maybe Vin the form of a piece of rod bent in the form ofa loop and having a portion 17 positioned.

between the nut 4: and one of the side links y in the `place of the washer 5 for clamping the loop in position. To release the bit it is thus simply necessary to hook the portion A2 of the tool intov the loop 4and operate the handle portion s0 vas to press upon the end of the wedgeor clamping member 10. The clamping.memberv 10 can'thus'be held in a nonyclamping position until abitV has been removed and'another one inserted. The ends ofthe spring 13 can also be fastenedV in such f a manner asto prevent the loss ofthe wedge ing.v member-jin case there'is no bitV in lits socket.l In Figs. 1,2,"and 3, it will benoted thatthe longitudinal axis 'of the socket 11 is inclined in the Qsamedirection as the longitudinal axis 'of the socket for holding the bit.

. InFigA- this is slightly modified in that the longitudinal laxis ofthe socket 11 landthe f ivedging-ncemberl()V is at 'right angles to the line-of'travel `of the chain itself 'so that each` clamping memberV 10 occupiesa position at.'

' an angle. with1`respect" .totheVv shankv of the( bit. .'Furthermore this'clamping member isv kthe longitudinal axis of the socketl is in-A clined or positioned atan angle to the axis of the bit shank the degree being such as to press the flat face 10 of the flattened mem# ber againstthe bit. .This member, ,like in the construction in Figs. 1 and 3, is 4also i" Y forced outwardly in the direction of removal of the b-it but in this case a Vcompression spring 21 is positioned between theV Yinner end of the clamping member 10 and the bottom of its socket. The ends kof the'spring may be attached to the end of the socket and to end of the member 10 respectivelyby` means of pinsl 22 or otherwise so as to prevent the loss of the member 10 in case there is no bit in position. The chain, in orderl to hold it substantially'rigid while itis cutting along its proper lines, is adapted to be supported by a frame or guiding member.

In'this constructionv this frame 25 as .shown in Figs. 1 to 5 has a flange or extension 264 on one side forming, in a sense, a runway in which the chain may travel.'` This Vhowever does not preventthe chain from becoming separated from the frame and lon this ac-v heads 27 preferably circular in form.` The edge of the frame 25 is'prov'ided with a continuous channel or groove in which these heads may travel. One` sideo'futhe undercut groove may be formed in the 'frame itself and the other side formed by Va iianged strip or plate 28 securedgtothe` frame bymeansI ico of the bolts 30 or otherwise." This construction is clearly shownin Fig. 3 andl operates t0 prevent the relative displacement Vof theV chain and frame while it is operating. In Fig. 6 the construction is slightly modifiedV in that thebolt has an offset portion 31 ateneV endv andv this-oii'set portioncarriesa lateral extension or head 32 which engages the` ange 33 on the holding plate 28. The side .linklfmay have a 'correspondingly Yshaped f gsocket 34 to hold the offset portion 31 of the bolt and in' this'manner the bolt maybe positively locked against rotation on its own axis while the chain is traveling..

`The speciiic 'formof guiding'mechanism herein described and sho-wn in the vdrawings, is'coveredby claims yin' my copending application Ser.` No. 848,726, filed July' 3v,

iic

1914, forf'anv improvement cutter chains forV miningv machines. Y Obviouslythose skilled in 'the art -Inay make Vvarious "changes Y in the Vdetails and isc i arrangement of the parts without departing from the spirit and scope of my invention as dei-ined by the claims hereto appended, and I wish therefore not to be restricted to the precise construction herein disclosed.

I claim:

l. In a chain cutter for miningl machines, the combination with a plurality of links and transverse pivotal connections between said links, oi' guiding mechanismen one side of the chain at the inner ends of suoli pivof tal connections, a plurality oi' cutting 'tools removably mounted in some of said links and extending into lthe same substantially parallel with said pivotal connections and projecting from suoli links into cutting position on that side of the chain opposite the guiding mechanism, and means extending longitudinally of each of said cutting tools 'for holding the saine in cutting position during the travel thereof parallel to the plane of drive and spaced therefrom.

2. rIn a chain cutter for mining machines, the combination with a liiik having a socket therein, of spaced-apart pivot pins for pivotally connecting said linkV to the next adjacent links, said pivot pins extending in the direction of feed of the chain cutter and said socket being substantially parallel to f said pivot pins, mechanism extending substantially parallel to said pivot pins and located between the same in said socket to hold said cutting tool tor travel parallel to the plane ot drive and spaced tliereiroim after said tool has been inserted in said socket.

Y 3. A chain cutter for mining machines comprising a link having a transverse socket with straight walls where engaged by the j tool shanks, a cutting tool having a shank adapted to be Vinserted into said socket .and

engage such straight walls, Va fastening wedge in said link in position to engage the back'of the tool shank relative to the direction; of cutting travel of the tool, means vieldingly urging saidy fastening wedge in a. i

direction approximately longitudinalof said socket and against said shank when'inserted.

Y in said socket topermit free vinsertion .of-

said shank and lock it automatically against withdrawal whether fully or partially inserted` in said socket, said shank lia'v'ing'iiat Yso' plane faces for engaging the wallsof Vsaid 'socket Vat various Vdepths' relative to saidlii'ik, andgan extension progecting from said wedge Vin position to ,receive Va:'hammer*blow' to i quickly release said wedge-'and permit quick Y withdrawal' ci saidtool.

, 4i.y In a chain cutter for miningfma'chines, the combination 'with:'a1chain coi'nprising,

side links and intermediate links; said` side links being in spaced-apart parallel planes parallel to the plane of drive', said"` intermediate links having sockets therein@ extending transversely of suchY plane of drive; cuttingv bits inserted in said sockets imposition:l for a cutting path of travelf parallelav toi-the*y plane of drive and spaced therefrom, sardil bits/being removable from the outer edge ofsaid intermediate links, wedging memberseat^r tending" transversely of said links backof the cutting bits` relatively to their cutting path of travel and in position to permitfzree and quick insertion *ofV said: bitsy in saidsockets, resilient means for forcing; said' members in wedging positionsv alongy said bits to lock saidV bits` against removal from said sockets, and projections from' said wedging membersin position@to=receivefham nier blows against the a'ctionof saidl resilient means to release saidV wedging: members quickly and' also release saidbits` for quick Withdrawal from their' socketsiv 5. In a chain cutterv for iniiiingxmachines, the combination-with a chain` having a piemel of drive transverse tol a'y planey extending? through they chain fa-n'df the line' of cutting travel, oit' guiding mechanism for sai'di chfain Y along ay path parallel to said planeiof-driv'e and spaced therefrom on one side off 9,5- chain, said chain embodying sideflifnks and?` an intermediate link. having. a tooly socket extending i substantially at' right angles f tof' the plane of drive',- saidi chaiir also compris; ing parallel'spaced-apart VpivotalV connections? 100 extending in the directionof feed atly right angles to the plane of drive andbe'tweentlife intermediate link and the'fside links', a@ cut'- ting bit inserted in' the socket s'aid interi-Iv `mediate link toextend from' the?A sid'e ofth'e 105 chain: opposite the guiding. mechanism in yposition to have a pathv ofv travel paralleli to'- the plane of drive and spaced: therefromg'a wedge member coperating ,withA the'y walls of said socket to clamp said cutting; bit/,in' 1110 position and resilient means connected to said wedge to automatically replac'ei saii'dl wedge in locking lposition when released'.v

6. AIn a chain cutterxior mining manchi-11%,. the combination with a chain link having: a- 1'15 tool socket thereinfo a cuttingqbit insertedk in lsaid socket, a wedge member coperating.- with the walls ofsaid socket to clamp said cutting bit in: position, spaced apartv piv'- Votal bearings each substantial-lyparalleli toy 152'0 VtheV Ycombination with'a cha'i'n` embodying: M5

flat side links and an intermediate" cutter*` holder link having a transverse socketrelaI` `V tively toV said tlat side links,"pivot" pins eX- teiiding through holes :in the end poi-tions of, said sidelinksafnd throughend portions:v 1590-. 5

i operating position.

of said intermediate link also transversely of said intermediate link and said side links, means for holding said pivot pins in position, a cutting-bit having a shank extending into said socket in substantial parallelisinl with Vsaid pivot pins, and means for lautomatically clamping said cutting .bit in 8. In a chain cutter for miningv machines,

the combination with a cutter holder linkA having a socket therein, of a cutting tool ,having a shank extending into said socket, 'a' wedge in said socket engaging said shank,

said wedge having an exteriorly extended portion, and aspring mounted on said cutter holder and connected to the extended said sockets and a ycutting member extendingfrom one side of said chain for travel along a path parallel to said plane of drive and spaced therefrom, Wedges each extendingitransversely of the plane of drive and eacli'- in position to hold one of said tools in v cutting Vposition during the lineal travel ofV said chain, and yguiding mechanism for that side. of Athe chain opposite the side fromY which the, cutting end is projected, said cnttingfmechanis'm extending along va path sublstantially parallel to the plane of drive and spaced therefrom.

n10. A traveling chain cutter comprising a link having spaced-apart pivotal bearings substantially parallel to each other and .an

. intermediate socket substantially parallelto said bearings and substantially perpendicular t'o thel planeof drive, a cutting tool exteiidingintolsaid. socket fand having a cutting pathof travel .spaced from the plane ofdriveandsubstantially parallel thereto,

' av-member extending into saidsocketv to- 'i of the plane 'of drive, and a spring conleased: after insertingpsaid tool f' into said f, SOClGlij; i

getherf .with Ysaid toolto'hold thelatterin cutting position during lineal travel of Ysaid tool and during they feed thereof in. the direction of saidvpivotal bearings transversely neeted to-said member to move Vthe same'to holding-position when said member Vis' revllf-A travelingV chaincutter comprising valli-nk having aV socket .extendinginto the same transversely of tlie cha1'n,'pivotal'con' nections for the next adjacent links spaced apart on opposite sides of said socket and extending transversely ofthe-chain, a cutting tool extending into said socket directly between said pivotal connections, device extending into said socket and engaging said tool, and a spring acting on said device for holding the same against said tool during lineal travel thereof.

12. A traveling chain comprising a link having a socket extending into thev same along the directionn of feed and transversely ofthe plane of drive of said chain, pivotal connections between said 'linkand saidA adjacent'links, said pivotal connections extending in the direction of feed and subf stantially at right angles to the plane of said socket transversely of the plane of drive and Vbetween vsaid pivotal connections and extending from one side of said chain. to'

cut during lineal travel of said chain along a path spaced from and parallel to said plane of drive, and a clutch embedded in said. link back'of said tool relatively to the cutting travel thereof to prevent with'- drawalV of said tool during lineal cutting travel thereof but said clutch having an 13.. A traveling chain comprising a chain Y link .having a socket extending.,transversely of the chain, a cutting tool capable of being freely insertedV directly Vinto* the socket insaid link from the "outer side of saidchain without altering theV connectionsbetween said tool holder and other parts of ysaid chain, and automatic mechanism carrieddi rectly by said link and extending `transversely thereof in positionto coperate with drive and spaced apart onopposite sides of said socket, aV cutting tool extending intoV such socket to permit free insertion' ofsaid on to automatically hold said lookin-gde;-

vice in locking ,v position to prevent withdrawal ofsaidrciitting toolduring operation Y thereof. i Y. 'j g 111 15. In achain cutter for mining machines, the combination with a chain having spacedl apartfflatlinksV in l.parallel planes .and in parallelis'mwith the' vplane of Vdrive between them, saidj chain also having Van interinev` diatef' link 1with -atoolf'socket extending .lio

izo

therein in; Vthe Vdirection'offeed' of? said 1 chain and transversely Tof the planey of drive, c a pair of pivot pins extending transversely i to 'end portions ofgsaid intermediate link leov and end portions of said side links, means for holding said pivot pins in position for relative pivotal movement between said intermediate link and said side links, said side links having a lineal travel in their own planes, a cutting tool extending into said transverse socket transversely of the plane of drive and extending from such socket in position for a cutting path of travel spaced from the plane of drive and parallel thereto, a wedge in said socket for engaging said cutting tool to hold the latter in said socket during lineal cutting travel of the chain and the feed of the latter in the direction of said pivot pins, a guide frame, and interlocking mechanism between said guide frame and that side of the chain opposite the side from which the cutting tool projects for guiding the chain along saidl frame but preventing it from moving away therefrom when said guide frame is vwlthdrawn from the kerf produced by said cutter.

16. In a chain cutter for mining machines,

the combination with a link having a tool socket extending` transversely thereof and transversely of the plane of drive of the chain cutter, of a cutting tool extending into said socket and extending from one side of said chain for a path of cuttii'ig travel parallel to said plane of drive and spaced therefrom, a key located in said socket to engage said tool and projectin' from said socket on the same side of said chain from which said cutting tool projects, and a spring carried directly by said link and connected to said key for yieldinoly holding the latter against said tool to lock the latter in position during the cutting travel thereof but permitting free and quick removal of said tool when said key is released by striking it a blow on that portion projecting from said socket.

17. In a chain cutter for mining machines, the combination with a link having a socket, of a tool having a shank extending.` into said socket, a wedge-shaped key iny said socket engaging said shank, and yielding means exteriorly of said link for holding said kev against said shank to lock the cutting tool in said socket during cutting operation thereby but permitting free removal of said cutting tool when said key is re-V leased.

18. In a chain cutter for mining machines, the combination with a link having a socket extending in the direction of feed and transversely to the plane of drive, of a cutting tool having a shank embedded in said socket', means for limiting the extent of movement of the shank into said socket to hold the cutting member of said tool inposition for a path of cuttin travel spaced a predetermined distance rom the plane of drive, a key embedded in said socket extending along one edge of said shank back of the tool relatively to its lineal cutting travel and projecting from said socket in position to rectly in said link and projecting from said socket back of the cutting tool relatively to its cutting path of travel, and yielding means for holding said key against said tool to lock the latter in cutting position,

:the exposed end of said key being adapted to be struck against the action of said yielding means to release saidv tool from its socket to permit quick withdrawal and the quick insertion of another tool.

20. In a chain cutter for mining machines, the combination with a link, of a tool having a shank mounted in a socket extending directly into the link itself, a key in the link itself extending approximately longitudinally of said shank, and means urging said key against said tool to lock the same in cutting position, said key being exteriorly extendedl and adapted to receive a hammer blow to quickly release said tool for withdrawal from said socket, thereby permitting quick replacement of the withdrawnV tool by another tool, such replacement being effected against the action of such urging means and the latter acting automatically to lock the new tool in position.

21. In' a chain cutter for mining machines, the combination with a chain comprising a plurality of socket links, of guiding mechanism associated with one edge of said chain, cutting tools mounted in said vsocket links with their shanks inthe plane of travel of said chain but extending transversely thereof, keys extending longitudinally of said Shanks, and yielding means exteriorly of said chain for holding said keys against said Shanks.

22. In a chain cutter for mining machines, the-combination with a socket link, of a cutting tool having a shank mounted in said socket' link, and a` self-acting clamp associated with said shank and extending longitudinallythereto and back thereof relatively to the lineal cutting travel of said cutting tool to lock the latter rigidly in position relatively to said link.

28. In; a chain-cutter for mining machines,

traveling cutter having a shank extending gripping' clamp mounted in saidsocket link lthe combination with a socket link, of a back of said cutter relatively to the cutting i 24, In a chain cutter for mining machines,

the combination with a link having a tool socket extending transversely thereof directly between the pivotal end portions of said link, of a cutting tool mounted directly in said socket to extend transversely of said link between the pivotal portions thereof, and means 'comprising a yieldingly mounted clamping member extending transversely of said link between the pivotal portions thereof in position to permit free and quick insertion from the exterior of the link of: said cutting tool but gripping said tool upon attempted Withdrawal of said tool from said socket, and an exterior extension on said member adapted to receive a hammer bloiv to release said tool from its socket to permit quick Withdrawal thereof.

25. In a chain cutter for mining machines, the combination With a link having a cutting tool socket extending entirely through said link and transversely to the plane of drive of the chain cutter, of a cutting tool having a shank embeddedin said socket and a cutting member extending into position for a cutting path of travel spaced from said plane-of drive, and means also embedded in said socket back of said shank relatively to the cutting path of travel of said cutting tool for holding the tool in cutting position and taking the direct thrust of said tool during its cutting operation, said means extending from said socket longitudinally of said cutting tool in position for receiving a hammerblovv to release the same quickly, the embedded portions of said cutting tool and said holding means being entirely inclosed.

26. In a chain cutter for mining machines,

Y the combination With a chain comprising a tool socket link, of acutting tool extending directly into the socket of said link, clamping mechanism extending along the said tool in the link itself for holding said tool firmly in position to move bodily vvith said link Without movement relatively thereto, and a shoe Ahaving a toe adapted to step on a part' of said chain While its heel engages said clampingmechanism for the application of force longitudinally of said clamping mechanism to release said clamping mechanism.

27. In a chain cutter for mining machines, the-combination With a link socket member, of a cutting tool mounted therein, clamping mechanism for said cutting tool and comprising a member extending into said socket and an exterior projection, a hooked device having a heel engaging said exterior proj ection, and a seat mounted on said chain to receive the hooked portion of said member.

28.. In a chain cutter for mining machines,

the combination with a plurality of alternate socket links and alternate intermediate links, of cutting` tools mounted in the socket links, yieldingly mounted Wedges in the socket links acting as clamping mechanism for said cutting tools, said Wedges having exterior projections, a seat mounted on an .versely thereof, yieldingly mounted Wedges in' the, socket links acting as automatic clamping mechanism for said cutting tools, each of said Wedges having an exterior projection, seats, nuts on alternate bolts for holding said seats against the 'corresponding outer intermediate links, nuts for holding the other bolts in position, and a releasing shoe having a heel engaging said exterior projection and a toe stepping on said seats.

30. In a chain cutter for mining machines, the combination of a plurality of side links and intermediate links, said intermediate links having transverse sockets, cutting tools removably positioned in said sockets, clamping devices positioned in saidintermediate links, and means exterior of said intermediate links for yieldingly urging said clamp.- and devices toward said cutting tools in a direction approximately longitudinally thereof.

31. In a cliain cutter for mining machines, the combination With a link having a tool socket extending entirely through the same and transversely thereof, of means for piv-A otallyV connecting said link with the next adjacent links on pivotal axes extending transversely of said link, a cutting tool extending into said socket, a key in said socket and engaging said cutting tool, and a spring mounted on said link exteriorly thereof for yieldingly holding said key against said tool i to lock the same in position during cutting operation but permitting free removal of said tool when said key is released by a sufli cient endvvise pressure thereon. c

32. In a chain cutter for mining machines, the combination with a socket link, of a cutting tool having va shank extending into said lsocket link transversely thereof, said shank vhaving straight plane surfaces on. all four sides, means forpivotingsaid socket linksl 'to next adjacent links on axes extending transversely of ysaid socket link, and a selfacting clamp extending transversely of said socket link and acting on said cuttingv tool;v

. tool.

.33. In a chain cutter formining machines, tliecombination with a link having spacedapart perforations in itsy end ,portions for pivoted connections -to the next adjacent links on parallel axes extending transversely of said link and in the direction of feed, said link having va tool socket extending transversely of said link in said perforations and having a forwardplane wall and spacedapart vside walls, a cutting tool havinga shank with a straight plane forward .face to engage the Vforward .wall of said socket, and straightplane side faces to engagexthe side walls of said socket, and means .ini said socket back of said shank relative to the direction of -travelof the cutting tool tohold the cutting tool automatically in adjusted position after said shank has beenv inserted into said socket partiallyor `fully to engage the 4i'j'orward wall and side walls of p said socket.

34. In a chain cutter for mining machines, the combination with a Aplurality lof tool socket links, of intermediate connecting links, ypivot rods extending ytransversely of said tool socket links and of said intermediatelinks to pivotallyconnect said tool socket links to said intermediate links ion-axes extending transversely-ofv said tool socket links, a guide frame, extensions fromrsaid pivot rods, mechanism on said guide frame to coact with said extensions to guide said links over linear travel, cutting tools mounted in said socket links and extending'transversely thereof between said pivot rods, said cutting tools extending into cutting position on the side of the links opposite the guiding mechanism, wedges in said sockets approximately in parallelism with said pivot rods, and springs acting on said wedges for continually holding the same in locking positions.-

35. In a chain cutter for mining machines, the combination with a chain comprising a link having spaced-apart parallel bearings extending in the direction of feed of the cutter and intersecting the plane of drive thereof, of a cutting tool extending into a socket in said link transversely of said plane of drive between said spaced-apart bearings and projecting from said link in position for a cutting path of travel spaced from the plane of drive and substantially parallel thereto, automatic clamping mechanism carried by said link in position to permit quick insertion of said tool in said socket and prevent withdrawal thereof by locking said tool in rigid connection with said link, said clamping mechanism being releasable from the outer side of said chain to permit withdrawal of said tool from such side and the substitution therefor of another tool, pivot pins extending through said spaced-apart bearings a,y uide frame followino' the chain cutter relatively to the feeding direction thereof, Imechanism :between vsaid guide frame and `said pivotpins for rguiding the chain :to cause the cutting -toolto describe its aforesaid path `of travel and lock said chain against Ymovement from :said guide frame in fthe .direction of feed of said guide frame in the .opposite direction from said chain,andmechanism for Aholding saidipivot pins inixed relation to said guide frame v.in the plane thereof and .projecting .in the -Vdirection .of feed to confine the kmovement of the cutter to a lineal path,

436. 'In a'chain cutter for miningmachines,`

the combination with a plurality of pairs of lside links and having a toolsocket extending transversely thereof and -transversely of the plane of drive,clampingmechanisin on lsaid intermediate link for 'holding said tool rigidly in position relatively-to said Aintermediate link Vfor bodily travel therewith, spaced-apart pivot pins extendingthrough said pairs of links and through the end portions-of saidintermediate `link in feeding direction substantially atright angles lto the plane of-drive, means forpreventing `the turning of said pivot pins relatively tol the inner side links, a supporting frame for the chain and movable bodily therewith in feeding direction, and mechanismv between said supporting frame and vthe inner ends of said pivot pins for guiding said chain to cause the cutting tool to have a path of travel spaced from the plane of drive and parallel thereof while confining the cutting tool to such path of travel by preventing tilting of said chain transversely to said frame and relatively thereto.

37. In achain cutter for mining machines, the combination with aV chain comprising two pairs of spaced-apart side links, of an intermediate socket link, pivotal connections between the respective pairs of side links and the end portions of said intermediate link, a tool extending into the socket of said intermediate link transversely of the plane of drive and projecting from said intermediate link into position for a path of travel spaced from said plane of drive and parallel thereto, clamping mechanism extending into the socket of said intermediate link back of the cutting tool for holding the latter rigidly in position relatively to said intermediate link, said clamping mechanism extending outwardly and being releasable exteriorly to permit quick replacement of the cutting tool by another, a supporting frame, and mechanism between said pivotal connections and said supporting frame for guiding said cutting tool along such path of travel and confining said tool to such path of travel by preventing movement thereof sol transversely off such path of travel, said mechanism between said vpivotal connections and said supporting frame guiding the chain along the forward portion ofv said framein a direction transverse of the feeding direction and holding said chain in alinenient with said f'rame.v

38. In a chain cutter for mining machines, the combination with a chain comprising a plurality of pairs of side links, of an intermediate socket link, pivotal connections between the side links and socket links, a cutf frame for preventing tilting' of said rchainV relatively to said vframe and also preventing movement of said chain away from `said frame to conine the path of movement of said cutter to a lineal path spaced from the plane of drive at right angles to said pivotal connectionsv and parallel to such plane of drive and the forward endy of' said frame.

39. In a chain cutter for mininginachines,

the combination with sideslinks 'and an inter-V mediate socket link, ofpivotal connections between said side links and said 'intermedi-V Y ate socket link extending in vfeeding direction at right angles to the plane of drive, a tool extending into the socket of the inter-y mediate linktransversely to the plane ofV drive and between said pivotal connections, clamping mechanism extending into the socket of the intermediate linkin positionV for'releasably holding said cutting tool rigidly in connection with said socket link, a

ygr'ooved supporting frame extending back from the chain along the line of said pivotal connections, 'and mechanism` between the inner side of the chain and said frame and comprising members extending from said pivotal connections mto the groot/edv frame for preventing tilting ofthe vchain relatively to said Vframe while guiding the chain along said frame to cause said cutterv tohave a path'of travel conformingto the' contour of the forwardedge of said frame and in alinement therewith in the direction of feed. r

In testimony whereofl I have signed my name to this specification, in the presence of two subscribing witnesses, on this'Qd da of September, A.'D. 1914./

` EDMUND C. MORGAN.

IVitnesses: f

' `,CiaiARLns II. SMM, Y `v EDGAR FRANCIS BEAUBIEN.

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