US2377505A - Loading machine - Google Patents

Loading machine Download PDF

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US2377505A
US2377505A US405068A US40506841A US2377505A US 2377505 A US2377505 A US 2377505A US 405068 A US405068 A US 405068A US 40506841 A US40506841 A US 40506841A US 2377505 A US2377505 A US 2377505A
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clutch
lever
shaft
cam
actuating
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US405068A
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Edward G Lewis
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Jeffrey Manufacturing Co
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Jeffrey Manufacturing Co
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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F13/00—Transport specially adapted to underground conditions
    • E21F13/02—Transport of mined mineral in galleries

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  • a further object efthe ⁇ ir/enti@n 1e te provide f f1 a-novel" controlling means forfajfpluralityof trib; tion clutches, ⁇ particularly useful jin connection With-loading'inachines.
  • ⁇ More particularly ⁇ it is the objectof thepresent invention rto provide friction clutch'contrdlled ⁇ ref Versible ⁇ power-transmission ⁇ means for loading machinepropelling means ⁇ ,and cable reelr ⁇ r1'echa ⁇ , ⁇ V nism so that as ⁇ the "machine lin'cves lforward, the
  • FIG. 4 is a transversesectional View taken on the line ⁇ 4 ⁇ 4v1of flf'liglfl looking ⁇ in ⁇ the direction of ⁇ 1thearrotirs;
  • i 1 Fig. 8 is an ⁇ elevational viewnof themanual 1 mechanism 'for operating the -ffriction'1 clutches;
  • the loading machine illustrated Lin the .accompanyingdrawings comprises atrack mountedV truck 40 :upon which is mounted 11a gathering con-- ⁇ veyor 1.44 and a dischargeconveyori42,ftheiformer being adaptedlto dig :into andegather loose ⁇ or semi-compactfcoal andconveyit to the latterby ⁇ which" it'1 is discharged intotrack mounted coal e cars.
  • V-w111 be hereinafter ⁇ described.
  • the main -frame Adjacent its forward end the main -frame comprises a Jbed1plate 49 1(Fig. ⁇ 12) rigidly attached to the tops 1- of ⁇ the side members( 4 ⁇ 4 and iront crosspieceaslbywelding.
  • I1 and the drive vmeans therefor- are supported on ⁇ thisbedplateau.
  • 1 Adjacent its rear -cnd, ⁇ thejmain frame is provided with a bed platell '(Fig ⁇ . '21) which is rigidly attached to ⁇ ⁇ the bottoms of the side members M supports the-.single drive electric motor 224wl1ich drives all ofthe apparatusonfthe loading machine and supports most of the power-transmission gearing for controlling fthe loading machine.
  • the truck 40 ⁇ s mounted uponapair of forward track engaging flanged ⁇ Wheels 5 I.
  • the truck 40 is also provided fth rear track engaging flanged wheels V56,156 mounted upon-axle '51 journaled in bearlngrboxesja, 58 ewige-2e) -slidablelngitudil vide within the hopperI it is driven, as hereinafter described "in' full d'e tail. It is thus evident that driving power will be supplied to all the track engaging wheels.
  • the bottom plate 69 is removably the casting 1 3 by a threaded ring 16 the top ⁇ oflthe said-casting 13 and held locked by a set screw. i. .If-x w
  • the discharge conveyor 42 comprises three'articulated parts includingastationary. hopper ⁇
  • 69 comprises a bott omplate
  • the electric motor 224- is provided (with a forwardly extending armature shaft 225 (Fig. 1) drive pinion 226 meshing with 221 which is rigidly attached housing 228 is keyed to a vertical shaft 239 which bracket 23
  • anti-friction ball bearing 232 is interposed between the bracket 23
  • the bottom of the shaft 239 is supported '1n a bracket 234 (Fig. 4) formed rigid with the bottom plate 59, lsaid support being through an antifrictionball bearing 235.v Keyed to the lower end of the shaft 239 and above the'ball vbearing .235, should be ⁇ noted that the gear 221 and the gear 23'6 are both keyed tothe shaft,239,.xandrboth will therefore be driven -together aty all times fromthe motor 224.
  • the shaft 239 is a clutch member 231.
  • the gear ⁇ 249 which is controlled by the ⁇ clutch 229 is individual to a gear trainfor driving the gathering conveyor chains.
  • Thegear 249 meshes with the idler; gear'25l mounted upon anantifriction supported shaft 252 journaled in a cup Journaledv looselyon -the central portion of 4therefore a detailed stantly in" mesh 2,377,505 253 ⁇ (Fig. 1)" and removably attachedI tothe fronty b'ed 'plate 49.1
  • the gear 25Iin turni meshes with the large gear 254 carried by a shaft ⁇ 255 on antifrictionbearings in the previously described casting 13. It should be particularly noted that since the vertical axis aboutwhich the gathering conveyor 4
  • y transmission mechanism for the truck propelling means includes the previously described gear 236 which is driven directly from the motor 224.
  • the gear 236 is beveled and meshes onopposite sideswithbevel gears 258,258 of reversing friction clutches 259 and 260; respectively, as shown iIiFig.4.- i Y l
  • the clutches 259 ⁇ and 260 are similar and description of clutch 259 will sufce for both.
  • Theclutch 259 comprises a housing 26
  • is loosely journaled on a longitudinally extending hollow drive shaft 262 to which member 263.
  • Housing'26l and" clutchmember 263 carry alternate stacked ⁇ friction clutch plates 264 which ⁇ may be compressed l is keyed a clutch into clutch engaging position by an operating ring 265 adapted to be engaged by the opposed heads Aof an operating key 266 (Fig. '1) which extends through an elongated slot 261in the drive shaft 262 Vand through an elongated slot 268 ,(Fig@ 6) in an operating shaft 269 and is removably held in place bysaid end heads, one of which is formed by spaced bars 265 rigidlyjand removably attached by rivets 266',
  • both of the clutch elements ⁇ 285 and 28 ⁇ 6fo ⁇ f ⁇ Fig. 2 arefiny clutchmreleasing or disengaging position 'and whatever will be transmitted to thecountershaft ,215.
  • ⁇ clutch ele- ⁇ ment 285 will be moved to applied or engaged position whichwill effecta high speed connection 215.
  • the truck propeiling mechanism ⁇ may be operated at a high transportation speed by ⁇ throwingin the clutch 283, 285 and ata low feeding speed by throwing injthegoluton 284, zas. mechanism may be reversed bymeans of thereversing' Vgearing, shown in Fig. 4, without reversing' theidirection of rotation "ofthe motor 224. ⁇
  • the truck propelling Y ally mounted on the rear bed plate 50 by a shaftv journaledin abearing 326v mounted on anarm pivoted to a bracket 321 carried on the top ofan oil reservoir 328 of the hydraulic control system ofthe loading machine.
  • the drum 325 is adapted to carry ⁇ a flexible electrical cable which connects the source of electrical power supplyto the electric motor 224.
  • Rigidlyattachedftc the cable drum 325 is a drive sheave 330 driven by chain 3 3l from a sheave 332. The ratio of the sheaves 330 and 3 32 ,is so selected that the.
  • the drum 325 must rotate at different speeds yrelatively to the speed of travel of the loading machine during the hauling in of the cable due to variation in the effective rdiameter of the drum 325,.
  • the sheaves 330 and 332 have smooth surfaces so that the chain 33
  • the sheave. 332 is a one-way power driven sheave so that when the loading' machine is operating to pay out the electric cable, the tension on the latter is relied on to rotate thevdrum 325, the electric cable being pulled in, ofcourse, under power.
  • the sheave 332 is journaled loosely on a cup sleeve keyed to the shaft 2 15. Pawl and ratchet mechanism between the cup sleeve and the sheave 332 permits rotation ofthe sheave 332 from the shaft 215 only when the electric cable is to be pulled in.
  • a flexible steel' cableA is adapted to be associated with' the'cable drum 336, the free end of which may be connected to an anchorage in the mine -extraneous to the loading machine in such position as to cause power rotation of the cable drum 336 to aid the loading machine inrcli'mbing a hill.
  • it is not necessary tov use this flexible steel cable but sometimes severe conditions are encountered, making its use desirable.
  • the former is provided with ;aws adapted to co-operate with vjaws of a sliding clutch member which is feathered to the end of the shaft 215 and operated by ⁇ a shipper.
  • the rear crosspiece 46 of the main frame of the truck 40 carries' a guide member having top, ⁇ bottom and side anti-friction rolls.
  • the electric cable may besupported on the guide member 35
  • the pump 351l is of such a construction that regardless of its, direction of rotation it will always supplyv pres-l. sure at the same port. tain full control of the machine in the event that the motor 224 is driven in reverse direction.l
  • a' guide pulley 342 is carried by a bracket 343 supported by the bed plate 50 directly tothe rear of the drum Y336, to act as a guide for the aforementioned steel cable.
  • a pair of guide pulleys 344 and 345 are provided adjacent the rear end of 'thel frame 40,
  • whichis connected by ymeans of the pin 432 to a rod 433 both endso'f which are' screw-threaded as shown in Figs.' 4 and l2..
  • the spacing block 439 has extending laterally therefrom an arm 439'. ⁇ The aforesaid unit thus.
  • the outer end of the arm 43,9 an opening 543 in the reciprocating plate 444, the upper .and lower edges of which'have ⁇ tongue and groove connections at 444, 445 ,with the uppery and lowerv guide bars y443 and',44 ⁇
  • the upper guidebar446' mayb'e secured to the spacing plate 61 by means vof the bolts This is useful to main-l ⁇ extends through f ⁇ the front quadrant plate ⁇ the outer end of which ⁇ and ⁇ 411 ⁇ is t a 4 spacing is horizontal at ⁇ the finger 50
  • the spacing plate 461f mayibe secured to the plate 410 by means oftbolts 41
  • Thelowerend ofthe lever 443 is ⁇ Welded. to 413 which is journaled 414 on the bearing415, is provided with a discshaped ⁇ head 416 of enlarged diameter. Also by ⁇ means ⁇ of ⁇ the bushing ⁇ journaled on the bearing 415 is a rear quadrant plate 411. Intermediate the quadrant ⁇ plates 413 ⁇ block 418pwhich ⁇ is also journaledby meansI of ⁇ vtherbushing 414 on the ⁇ bearing 415. The front and rear quadrant plates ,413 and ⁇ 411 are respectively pinnedV at. 419 and 480 to thespacing block 418, as shownin Fig..l4. Lubricating means may be provided at 48
  • the rear end of the bearing 415 is provided with an annular shoulder ⁇ 482 which nts against the front side of thespacing plate 461
  • the rear end of the bearing 4.15 is screw-threaded at- 483. ⁇
  • a nut 484V is screw-threaded ⁇ on the rear end ⁇ 483 to force a-Washer 485 back plate 410 to very securely holdwthe bearing 415 rigidly connected to the plates 4'61 and 410, thereby holding the upper and lower guide bars 446and 441 rigidly connected to the bottom plate 50 shown in Fig..4.
  • centering mechanismv at 4911 which will also serve to limit the throw of Athe lever 443,l and when ⁇ the latter is released such centering mechanism will automatically re-V turn the lever 443 to its4 vertical position.
  • the centering mechanism comprises - ⁇ a bracket plate 498 bolted at ⁇ 499,499 to the reciprocating plate 444.
  • the plate 498 is provided ⁇ with ⁇ a downwardly extending linger 500 through which ex tends a bolt 50
  • a spring 504 intervenes thenger 500 andthe head of the bolt 50
  • ⁇ By means oi-a nut 506cm y the threaded end of vthe bolt 50
  • Y Located within the cylindrcalbody portion 5
  • Fig. p12,r abutment washers 523 and 524 are adjustable along the screw-,threaded of the rod 433 ⁇ by .means of the nuts 521 and 528. Additional nuts: ⁇ 529 and 530 are. provided as lock nuts to firmly hold ⁇ the ball bearing unit 509 the spring 52
  • the lever 443 need be moved only about vthirty-five kdegrecs in either direction to move one of the rollers 490 or 49
  • may be pulled or pushed 4approximately horizontally with the assurance that the operator can easily move the lever to its locking position or slightly beyond the dead center locking or holding position.
  • a threaded rod 449 provided with adjustthe reciprocating plate 444 te'ndable nuts 450 and a compression. ⁇ spring 45
  • the rod 449 is pivoted to an eccentric crank pin,453 the axis of whichis spaced from the axis of the shaft 454 to which it is rigidly connected.-
  • the shaft 454 is journaled in a bearing box 455 carriedby the plate 248.
  • An operating handle 456 is keyed to thershaft 454.
  • Suitable means (451, 464, provided on the loadingfmachine for starting and stopping the electric motor 224 and for reversing the same.
  • it may be 'crammed or propelled along the mine track to the place where the loading loperation is to be performed'.
  • the ⁇ drive wheels of the vtruck will be driven at their fast speed and the electric cable will be paid out freely from the cable drum 325.
  • the gathering conveyor will have its front end supported above the track rails.
  • the gathering a'ncirdischarge,y con'- veyors may be controlled yby the operator ⁇ who rides on a small platform on the'truck v40 adjacent the various levers connected to valveshjfor controlling the hydraulic motors, particularly to swing the gathering and discharge conveyors as required by the travel of the loading machine along a ⁇ curved track in amine.
  • the entire machine may be fed forwardly pro- 466, Fig. l) may be up-in accordance wi ⁇ site directions. of the gear254clockwise and the movement of vidingr a ⁇ frenan attackl ofthe ⁇ gathering con- ⁇ 'vey'o'rfli on the coal fatthe bottom ofthesemicompact mass of dislodged coal to be loaded.
  • the gathering conveyor may bereciprocated 'to umore efdciently effect loading of the coal, byoperating the reversing clutches 259 and 260 ⁇ of "Figi In other wordsywith ⁇ the electric motor 224 continuouslyoperatingin the Harborrection, vtheoperator may move the lever 443 'in eithei ⁇ direction from neutral position to effectoperation ofthe reversing clutches 259 and 260 tofeflect reciprocations of thegathering" conveyor ⁇ during loading operations.
  • i of'thelgatheringconveyorthe clutch 286 (Fig. 2i)
  • the electric cable onythe drum 325 may be paid out orV wound ing machine.
  • the whole loadingmachine may be transported along the mine track under control of theoperator'who maystart or stop or reverse-the elec- 'tric motor 224 by ⁇ means i of suitable controlling 'mechanism (451,146 ⁇ 4, ⁇ 3466, Fig'l) connected thereto.
  • the gear 236 Since@ the gears 221, 240 and 236 rotate to# gether with the shaft 230 ⁇ whenfthe clutch 229 ⁇ is applied. the gear 236 will ⁇ be rotated clockwise as viewed iniplan in Fig. 1. As shown in Fig. 2, the sprocket 291 is: located on the left-hand side of the loadingmachine looking forward, and consequentlyA when the gear 236 rotates clockwise; as viewed in plan, the :gear y258wi1l eiect clockwise rotationA of :the shaft 262, as viewed in Fig.1.
  • the operator has no occasion for reversinggthe motor 224, but if the gathering nights become stalledlin the semi-compact mass of coal adjacent the coal wein, it'sometimes ⁇ is desirable to ⁇ reverse the elec in order to assist in releasing the coal nights from During loading operations, the electric motor'224 should always be operated-in such direction as to effect proper direction of the coal mass.
  • the truck propelling mechanism comprises power transmission mechanismbetween the electric motor 224 andall of the wheels 01j the truck.
  • This power transmission mechanism is primarily under the control ofthe main friction clutch 229 shown in Figs. ⁇ 1 and 4.
  • the operator may apply or release the clutch v229 by means of the lever 456 as shown in Fig. ⁇ 5; ⁇
  • the truck i propelling power transmission mechanism also includes the reversing clutches 259 and 260 shown inFig. ⁇ 4, either of which may be applied by the operator actuatingithe lever 443 in ⁇ onedirection or the other, as shown in Figs.
  • the floading machine during operationi may be moved along the mine track in either direction ⁇ without ⁇ reversing the electric motor ⁇ 224 but even if the electric motor 224 is reversed for the purpose above explained, the loadingm'achinefmay 'be moved in either direction along the minetrack at any time by means of the reversing" clutches ,i
  • the ⁇ gathering mechanism maybe moved forwardly or rearwardly under the control of 'the op- ⁇ eratolpandV such forward or rearward movement may be at relatively fast speed or relativelyslow speed under the control'ofthe clutches 2B5and 236 of Fig. 2; A slow, powerful sumping movement into the semi-compact mass of shot down coal may thus be effected, andwhenever desired la slcw powerful withdrawal movement of the gathering mechanism may beeiTectedL
  • the starting and vstopping of the pair of end ⁇ less chains SI ofthe gatheringconveycr are controlled by the mainclutch 229 shown ⁇ inliigsl and 4.
  • the sprocket 291 mayalways be rotated in th'e same direction when the motor 224 is rotated -in a'lgiven'direction.
  • the cable reel 325 may be operated by power to wind up the electric cable thereon, this cable containing the insulated Wires connecting the motor 224 to the distant source of electric power supply. 'The pawl and ratchet mechanism above referred to, permits the paying out of ythe electric cable as the -loading machine movesforward along the mine track.
  • the clutches are individually operable and the actuating mechanism for each may be individually adjusted. Each clutch is yieldingly applied and each maybe set to slip upon reaching a predetermined load. Therefore, by reason of the springs 52
  • the combination with a driven shaft, of reversing friction clutches associated therewith mechanism comprisingI a rod movable axially of said shaft for applying said friction clutches, an operating lever, mechanism comprising dead-center means for limiting each movement of said lever to its opposite-positions from neutral to substantially -less than 90 and locking said operating leverat its limiting positions, and connections comprising adjustable abutment'mechanism on said rod Vfor cam device to reciprocate rectilinearly, means on said lever in position to engage said cam device to move the same rectilinearly when saidlever is moved onits pivot, mechanism limiting the movement of said engaging means to a, position just beyond dead centerv relative to the pivot of the lever to effect locking of the latter just beyond such dead center position, and clutch actuating mechanism between said cam device and said clutch.
  • the combination with ⁇ a; friction, clutch, of i means comprisingan axially vmovable rod for applying said clutch, an abutment ⁇ mounted on said rod for adjustment therealong, and mechanism compris ⁇ ing an actuating device spaced from said abutment but movable along said rod into ⁇ engagement with said abutment to effect axial movement of saidrod ⁇ and the application of said clutch, the construction and arrangement being ⁇ such that such actuating deviceyhas a predetermined lost motion from neutral before engaging said abute ⁇ ment, to apply said clutch.
  • mechanism" 4 comprising an actuatingdevice betweensaid abutl ments andv movable valong said rod into engagement with either of said abutments to apply one of saidclutches, the construction and arranger ment being such that such actuating device when in neutral position ⁇ is spaced from both ⁇ of said abutment devices and has predetermined lcst1n0 ⁇ tions from neutral before engaging ⁇ said abutments to apply said clutches.
  • a clutch adapted to connect said shafts, a pivoted ⁇ operating lever, a movable cam device, ⁇ mechanism ⁇ guiding said cam device for movement rectilinearly, means on saidleverin positionto engagesaid cam device ⁇ tomove the ⁇ same rectilin- ⁇ early when said lever is moved on its pivot, mechanism limitingthe.- movement of saidengagtuating unit mounted Aonsaidrod to slide along the same toward and from saidabutment, and means for sliding said ,actuatingunit along said rod to engage said abutment to elect axial movement of said rod and the ⁇ application of said clutch.
  • tion and arrangement being such that when the locking cam surface is engaged as aforesaid the said engaging means is at or beyond dead center relative to the pivot of said actuating lever.
  • a cam device comprising an lactuating cam face merging into a locking cam face, mechanism for guiding the actuating movement of said cam device, operating connections between said cam device and said mechanism on said operating lever in position to engage said cam faces one after the other when the lever is moved through an angle of about thirty degrees, and means for pivotally mounting said operating lever in position to enable said locking surface to establish a dead center holding position for said lever.
  • the combination with clutch mechanism of an actuating lever, a cam plate having an actuating cam surface merging into a locking ⁇ cam surface, a cam engaging device on said lever, mechanism pivotally mounting said lever'in position to enable said cam engaging device to co-act with said locking cam surface to hold such device'at dead center relative to the pivot of said lever, mechanism for guiding said cam plate in opposite directions in accordance with the position of said cam engaging device, and operating connections between said plate and said clutch mechanism.
  • the combination with a friction clutch of mechanism comprising a rod connected to said clutch to applyr combination with spaced friction clutches, of an actuating rod movable axially of said friction clutches to apply the same, spaced abutments on said rod each adjustable along said rod'to various positions thereon, an actuating device between said abutments and spaced from both of them, an operating lever, mechanism limiting the throw ois'aid lever through a predetermined angle, and mechanism between said lever and said actuating device to slide the latter along said rod into engagement-with said abutments, the construction and arrangement being such that when said Alever is moved through a predetermined angle one vof said abutments will be moved to vsuch extent as will take up wear in the clutch andapply the latter with a force predetermined by the adjustj ment of the corresponding abutment alongsaid lli'.
  • the combination with a vfriction clutch of means comprising a rotary rod movableaxially to apply the clutch, an abutment mounted on said rod and adapted to rotate therewith, an actuating unit mounted to rotate on said rod and to slide along the same toward and from said abutment, vand means for sliding said actuating unit axially along said rod to engage said abutment-to effect axial movement of said rod and the application of said clutch.
  • the combination with a friction clutch of means comprising a rod movable axially to apply" the clutch, an adjustable resilient abutment on said rod, an actuating unit mounted on said rod to slide along the same toward'and' from said re- 1 silient abutment, said actuating unit when in neutral position being spaced from said resilient abutment, andmeans for sliding said actuating unit along said rod to engage said abutment to effect axial movement of said rod and the applicombination with ay clutch, of a cam device hav- 1ng an actuating cam surface and a locking cam surface, an actuating device, mechanism for supporting said cam device for actuating movement, ⁇
  • the ⁇ combination with a, driving shaft, of a driven v shaft, reversing ⁇ mechanism comprising spaced friction clutches between said shafts, an operating lever pivoted for movements of substantially less than 60 in either direction from neutral position to either one of two dead center positions,
  • the combination with a drivingshaft, of -a driven shaft, power transmission mechanism between said shafts comprising a clutch, a pivoted operating lever, a movable cam device having a cam opening therein, mechanism for guiding said cam device rectilinearly, means extending from said Cil operating lever into said cam opening for effecting movement of said cam device rectilinearly and the locking thereof slightly beyond a deadcenter position relative to the pivot of the lever, and clutch actuating mechanism between said cam device and said clutch.
  • the combination with ashaft of means comprising friction clutches for effecting reversal of rota- ⁇ tion of said shaft, an operating lever, a cam device having a cam-faced opening therein, means connected to said lever and extending into said cam-faced opening in position toco-act with the ends of opposed cam faces of said opening to limit the throw of said lever in either direction from neutral position,- and lost-motion operating connections between said cam device and said clutches, said last-named connections being adjustable to effect a variation in the application of the clutches in accordance with the wear thereof and thereby secure regulation of the slipping of said clutches when a predetermined load thereon is reached.
  • combinationrwith reversing means comprising e two separate friction clutches, of a manual operating lever, a cam plate, means between said lever and a cam-faced openingin said plate yfor limiting the throw of said lever in either direction from neutral and locking the same in either positionspaced from neutral, and actuating mechanism between said cam plate and said friction clutches for applying the latten said actuating mechanism being adjustable for each of said clutches ⁇ to vary the pressure applied to each clutch independently of the other, the construc' tion and arrangement being such that for a predetermined movement of the operating lever in eitherdirection from neutral the throw of each clutch will be in accordance with the wear thereof to secure the desired applied pressure on each clutch independently of the other.
  • the ⁇ combination with a driving shaft, of a driven shaft means comprising a friction clutch for connecting said shafts, a cam Vdevice comprising an actuating cam surface merging into a locking ⁇ camA surface, an actuating lever, operating mechanism between said cam device and said clutch,
  • an operating lever, mechanism comprising deadcenter means for limiting the movement of ⁇ said operating lever to its opposite positions from neutral and locking said lever in its limiting positions, and connections between said lever and said rod comprising -adjustable abutment mech- ⁇ EDWARD G. LEWIS.

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Description

June 5, 1945.
Nv o Ot June 5, 1945. E. G. I Ewls LOADING MACHINE Filed Aug. l, 1941 5 Sheets-Sheet 2 /NVENTo/E'. EDWARD G. Lrfwnsl June 5, 1945. E. G. LEWIS LOADINQ MACHINE Filed Aug. l, 1941 5 Sheets-Sheet 3 w, Rw f mnov. L VQ. mmm. uwvbM E .Y .ww -B ATT June 5,V 1945. E. G. LEWIS 2,377,505
. l LOADING` MACHINE Filed Aug. 1, 1941 5 sheets-sheet 4 /NVE/vTo/e EDWARD G. LEWIS,
I HTT'Y June 5, 1945.
E. G. LEWIS LOADING MACHINE Filed Aug. l. 1941 5 Sheets-Sheet 5 --uLL UNITEDSTATES 1 ingiset forth in the appended claims.
Pefented June 5, 1945` d PATENT eeeee a y e e LoADINGMAoHmn e x t 1 t 1,:Edward G.`Lewisf,1;enaen,ohidlessigner te The Jerey Manu actiirng Qompanypacorpora- `ApplicationAugust `1, 1941,` serial Ne; 405,058
" H30 claims.' (cruz-721i f This invention relates to loading -Inachines par-4 ticularlyadapted for loadinglcoal ina coal mine, and one oi" its objects is theprovisionof 'improved power-transmission mechanism for operating traveling conveyor `n1eans1 embodied 1in the 1mgchinefm 1 11 11 't '19.1.
v Another object er the inventien" i'sgthe provision of clutch `controlled reversible 1poWer-transmis sion mechanismfor propelling means othe load` ing machine.
A further object efthe `ir/enti@n 1e te provide f f1 a-novel" controlling means forfajfpluralityof trib; tion clutches,` particularly useful jin connection With-loading'inachines.
` More particularly `it is the objectof thepresent invention rto provide friction clutch'contrdlled `ref Versible` power-transmission `means for loading machinepropelling means `,and cable reelr`r1'echa`,`V nism so that as `the "machine lin'cves lforward, the
cable "reel mayfbe paidout and as the'machine Other` objects theinvention v/,ill appear hereinafter, the novel features and.:combinations` be-` In the ac,compamrirlg(.lrawings` f y Fig.`1` is avertical longi udinalsectional .view of the `loader comprising my ventio'n "showingpan:y ticularly the rear endportion thereof `A Fig, '2 represents a sectionalljplan` View ,of the power-transmission mechanism for the gathering conveyorand power-transmission mechanism rfor the. cable reeltogether with Vthetruck propelling' 1 machine embodyingmy improvements; t "FigL 4 is a transversesectional View taken on the line `4`4v1of flf'liglfl looking `in `the direction of` 1thearrotirs;` i 1 Fig. 8 is an `elevational viewnof themanual 1 mechanism 'for operating the -ffriction'1 clutches;
nnen-somiglia; l 1 1 rie '10 isaseciofralflevatioe iakenonihelzie Fi`g.1"9 "is1 a. sectional plan View -taken on moves'rearwardly, the cable `reellmay be 4wound l up. 1 l l 1.0;10 er Fig.' a makinginthescdireetien ver the arrows;` i 11 1 Figs; 11,f11'2and 13 are enlarged detail `vlewsof the lostemotionconnectionsbetween the lever of Figexa and 1o and the nietleniclutehes .shown in H 11Fig; `.4',v Fig. w12 being a section taken Aon the 1 line |2-l2 offiFig. `11 lookingdn the direction of the the arrows;1and 1 1 Y -;1Fig.14is1another detail-view, 1j Y e e t The loading machine illustrated Lin the .accompanyingdrawings comprises atrack mountedV truck 40 :upon which is mounted 11a gathering con--` veyor 1.44 and a dischargeconveyori42,ftheiformer being adaptedlto dig :into andegather loose `or semi-compactfcoal andconveyit to the latterby` which" it'1 is discharged intotrack mounted coal e cars.` V-w111 be hereinafter` described. 1n 'compete detail, powerimeans is provided to .propel the loading? machine 1' along a mine track1lat `a relatively l'fast speedfand to operatefitalong such mine track 1 at ra fedingtor operating -speed vWhilev at the same time operating the 1gatheringtand`dis- 1 charge conveyors together and load coal into coal cars. 1 1 1 The Atruck 40 comprises 4a main `iframe formed t byllongitudinally extending side frnembersJM rigidly attached together at theirforward ends 'by an* arcuate 2 cross-piece preferably welded tothe side members land rigidly attached at their rear ends,` =asby"welding, toan arcuetecrossgpiece I6 (lig.s21)` having 4removably 1.a`ttached thereto an arcuate Jbumper plate v4l held' in place `by nuts and bolts. 1 g
t Adjacent its forward end the main -frame comprises a Jbed1plate 49 1(Fig. `12) rigidly attached to the tops 1- of {the side members( 4`4 and iront crosspieceaslbywelding. Thegathering conveyor 4| I1 and the drive vmeans therefor-=are supported on `thisbedplateau. 1 Adjacent its rear -cnd,\thejmain frame is provided with a bed platell '(Fig`. '21) which is rigidly attached to` `the bottoms of the side members M supports the-.single drive electric motor 224wl1ich drives all ofthe apparatusonfthe loading machine and supports most of the power-transmission gearing for controlling fthe loading machine.
The truck 40 `s mounted uponapair of forward track engaging flanged `Wheels 5 I. The truck 40 `isalso provided fth rear track engaging flanged wheels V56,156 mounted upon-axle '51 journaled in bearlngrboxesja, 58 ewige-2e) -slidablelngitudil vide within the hopperI it is driven, as hereinafter described "in' full d'e tail. It is thus evident that driving power will be supplied to all the track engaging wheels.
It will be evident that the thrusts receivelby- I the gathering conveyor 4| willY be transmitted to the truck 49 through the casting13and`ftherefore this casting and the Journalbearing 19 asis'mounted at its top ina sociated therewith are made of very rugged construction.
The bottom plate 69 is removably the casting 1 3 by a threaded ring 16 the top `oflthe said-casting 13 and held locked by a set screw. i. .If-x w The discharge conveyor 42 comprises three'articulated parts includingastationary. hopper `|55 supported upon the `front .bed plate 1 49 ofthe truck l49 by spaced side brackets? This hopper comprisesispaced side. members |58 and'ga downwardly inclined rear chutefor-med integral with said side platesy |58. Thechuteis adapted toreceive the material, such as from the rear end of `thegathering.v conveyor 4|. Pivotally attached tolthe hopper |55 by means of spaced side brackets |66,.|56 (Fig.y 1) carried by the `sidelmembers I61,;=|61 andjournjaled on pins. |68,y |68,.is a discharge boom dent that the boom :|69 is pivoted about a horizontaluaxis formed by, pins |68 for' vertical swinging movement with respect to the hopper, I 55 and the truck 49. The discharge boom |69 is formed [59. It is eVv threaded to coal, as, it;4 discharges .1
in two parts comprising-theforward part |19 and .i
the rear part, |1| lwhich are pivotally attached about a verticallaxis, the rearward part 1| vbeing swingableyhorizontally about such vertical axis. The forward part |19; of the boom |69 comprises a bott omplate |12 which-acts: somewhat as a continuation of the bottomiplate |62 of thefhopper |55. i
y A guide sprocketforthe chain atthe rearmost'endof therear part |11.;
155515 vprovided At the forward end; of the discharge conveyor 42 I; proa` centrally disposed guide 'sprocket forthe chain |6 5.T1o efectthe driving of the chain |65 I provide a driveisprocket |89 (Fig. l) .p 'l'omaintain the chain |65 in meshing relationjwith the drive sprocket;,|89. I provide a curved wear shoe |92 mounted -on the false-bottomplate |94.;
-The chainv |65 carriesaplurality ofspaced flights which', during -the upper vrun of thechain |65, are adapted-to' scrapeI over y the false bottom plates |64, |13 andt |89 successively, thereby conveying material rearwardly from the hopper |55 fordischarge into the mine cars. 1
- The rear end of thel discharge conveyorA section carrying a beveled v` a beveled ring gear 4.to the housing 228 of a friction clutch 229. The
wardly from the hopper |55. Due to this positioning of the electric motor v224 it is possible to provide a very large and powerful motor which is capable of effecting any and all of the drives required at any time while maintaining a machine of low height to permit its use in a relatively low roof mine or low vein coal mine. r
The electric motor 224-is provided (with a forwardly extending armature shaft 225 (Fig. 1) drive pinion 226 meshing with 221 which is rigidly attached housing 228 is keyed to a vertical shaft 239 which bracket 23| rigidly attached to the main frame of the truck 49. anti-friction ball bearing 232 is interposed between the bracket 23| and the shaft 239, which is held in place bya removable cap 233.
The bottom of the shaft 239 is supported '1n a bracket 234 (Fig. 4) formed rigid with the bottom plate 59, lsaid support being through an antifrictionball bearing 235.v Keyed to the lower end of the shaft 239 and above the'ball vbearing .235, should be `noted that the gear 221 and the gear 23'6 are both keyed tothe shaft,239,.xandrboth will therefore be driven -together aty all times fromthe motor 224. the shaft 239 is a clutch member 231. `Splined ontheinterior of the housing 2x28Y and on the exterrory of the clutch memberr231,which members 228and 231v comprise co-operating' clutch members, is a YpluralityA of overlapping stacked friction plates 238, alternateones of which are connected to fthe housing 22'8Jnand the. clutch member 231, respectively. Adjacent its ,bottom the clutch member 231v is provided with anintegral extended flange 239 to which isfsecured a gear 249;- The flange 239, in "addition to supporting the gearv249, also acts as one compression member. for the friction clutch plates 238. i To effect thecompression of theclutchplates 238 (Fig. 4) :andthus to effect'engagement' o'f the clutch members 228 and 231, I 'provide.a"`com pression ring 24| with inftliefhousi ng 228. "The circularflangemof the ring 24| bears against the plates 238. -Downwar'd movement of the ring`24| to effect the aforementioned compressionaction is effected by a plurality of pins 242 which' extendithrough 'apertures' in the housing 228` and are carried by aring 243 operable throughan antifriction ball bearing 244'operable by 1a trun-4 nion lcollar 245 which is' controlled by a shipper 246 keyed on a shaft 241 (Fig. 1) ,which shaftv 241 is'journaled at one endxln an upwardly extending plate 248 (Fig. 4) rigidly attached to a false bote llltyis supported bythe hydraulicmotor|94 for adjustmentin'elevation on thepivot |88, .i f
j lttentionisno w directed tothe powerytransmissionmechanism connected to the various devices to .operatethe same. Atthefoutset it may bejstated `thatonly asingle orncomrnon electric `r 1 49 and compvactly positioned belowthe discharge conveyor 42V which extends upwardly and reartom plate 249 which, in turn, is rigidly attached to the main frame of thetruck 49.1VA L"Adjacent its other end the shaft 241 is'supported in a pair of downwardly extending apertured plates 259,259 (Fig.- 2)` whicharebolted to the brackets 23|. Y `f Rocking movement of the shaft-241 to urge the collar 245 (Fig.l 4) downward, vwill cause an application of the friction clutchr229 to drive the gear 249. When the shaft 241 isl'released the clutch 229 will automaticallybecome disengaged due to lack lof suicient clamping pressure .on the plates 238. The operating means for/rotating the` shaft 241is shown inFigs. V4 and 5.V
The gear` 249 which is controlled by the` clutch 229 is individual to a gear trainfor driving the gathering conveyor chains. Thegear 249 meshes with the idler; gear'25l mounted upon anantifriction supported shaft 252 journaled in a cup Journaledv looselyon -the central portion of 4therefore a detailed stantly in" mesh 2,377,505 253 `(Fig. 1)" and removably attachedI tothe fronty b'ed 'plate 49.1 The gear 25Iin turni meshes with the large gear 254 carried by a shaft `255 on antifrictionbearings in the previously described casting 13. It should be particularly noted that since the vertical axis aboutwhich the gathering conveyor 4| swings is alongthe axisof the shaft 255,
power vcan be transmitted 'to said gathering conveyor through lthe geari254 while the gathering lthe ,the same" speedsbut in reverse directions, in fixed vrelation,
the flights jon one" chain tothe flights on the otherchain.'
Attention is'now directed `to the gear train which'is operative to drive the truck `40 either forwardly or reversely` and at either a fast tramor` sumping speed. y transmission mechanism for the truck propelling means, includes the previously described gear 236 which is driven directly from the motor 224.` The gear 236 is beveled and meshes onopposite sideswithbevel gears 258,258 of reversing friction clutches 259 and 260; respectively, as shown iIiFig.4.- i Y l Except inrespects hereinafter described in full detail, the clutches 259`and 260 are similar and description of clutch 259 will sufce for both. Theclutch 259 comprises a housing 26| to which the bevel `gear 258 `is keyed. The
housing 26| is loosely journaled on a longitudinally extending hollow drive shaft 262 to which member 263. Housing'26l and" clutchmember 263 carry alternate stacked` friction clutch plates 264 which` may be compressed l is keyed a clutch into clutch engaging position by an operating ring 265 adapted to be engaged by the opposed heads Aof an operating key 266 (Fig. '1) which extends through an elongated slot 261in the drive shaft 262 Vand through an elongated slot 268 ,(Fig@ 6) in an operating shaft 269 and is removably held in place bysaid end heads, one of which is formed by spaced bars 265 rigidlyjand removably attached by rivets 266',
"By referring lto l i bevel gears258 are rotated by thebevel gear 236 in reverse directionslf clutch 259 is applied, theshaft 262 will be rotated in` one direction by the motor 224, and when the clutch 260is applied`,.the shaft262 will be rotated in the reverse direction.`
formed` rigid with the falso bottom plaie 249,
, Keyed to the shari zszis o. drivejpinionm as l shown in Fig; 4. By referring to Fig. it Will be s eenftl'iat` the pinion`212 drives a variable speed reduction mechanism comprising la gear 212 con- Wlththe ge`a1'1212, `The gear '213 m1ng or transportation speed 0r at a lowfeeding` This gear train or` power Fig.` 4 it` willbe seen thatthe r meansfof which the shaft l therefore no drive the gear 214 are journaled looselyon A"the counter.'
shaftl215 mounted for'free rotation 'inijournals which are carried by `thefalsev bottom plate 249- The pinion 214 meshes' with a larger gear 219A keyedtofa` pinion 219.` The gear 218 andplnion' 219 are mounted upon a, shaft 289 journaled inv bearings (28 I, 28 l. The pinion 219 meshes Iwith al gear282 whichis loosely journaled ont the `count-` erL-shaft-215iw` i i C M l The-gears 213 and 282 are provided Withiclutch jaws `283` and l284 appropriate co-operating jaws. `A shipper Av281 i`s` provided for `the clutch elements `285- and'286; This shipperis` adjustably mounted on a shiftalzlleA shaft 288-slidab1e at'onefend'in a` journal'3289 (Fig.` 2) carried `by the'siderplate 44. l"Il'ieshaft"288 at tsther-end is pivoted' tOah pellting lever 290' mounted on" the bracket `29| carried ofi-the plate 248, asshown inFigsniand. V 1
As clearly illu `ratedin- Fig, 5,`the,lever' 299 is provided with `locking mechanism 292cooperati'ng with a plate 294 having three holes '295' Fig. 4)
288 'may locked in any oneof three three positions; ,i Y 1 In the position illustrated inI Fig." 4, both of the clutch elements `285 and 28`6fo`f`Fig. 2 arefiny clutchmreleasing or disengaging position 'and whatever will be transmitted to thecountershaft ,215. AlIf the shaft `2288 "is` moved to the left,` as viewedin Figi `4, `clutch ele-` ment 285 will be moved to applied or engaged position whichwill effecta high speed connection 215. When the clutch element 286 "is moved into applied or `engaged position 288 to the right,as viewed in Fig. 4,(a low-speed connection will,` beY effected between the, drive shaft"262 and the countershaft 215. Fora given direction of rotatiori of the shoftztztno shaft- 215 will be rotated in,the-oppositedirection mechanism shown in Consequently, when the `lillongated slots 269 are `so spaced with respect` in` operation.1 This cangreadily befunderstod by referring to Fig. 2 from which itwillbe seen that if the gear 212 rotates in a cloclwise direction, the gear 213 will `be rotated"anti-clockwise. and-also the shaft 215, whether the clutch 283.` 285 is applied or whetherthe clutch"2484,l286 is applied. Reversal of speed is effected by Fig. lltand described more fullyhereinafter.
Keyed to the oouo'torsnafi 215 is derive. sofoot;
etv 293 (Fig. 2)` which drives the sprocket `5,9 through `a drive chain 2931. `The ydrive sprocket 59 is connected `to the axle 51 and the wheels 56; of the truck 48. The axle 51inturn drvesthe. front axle through the drive chain 65 Vfto drive the front wheelsil of the truck 4U.` Itwill thus be manifest that the loading machinel maybe driven through `the traction wheels from the motor 224 "either forwardly lor reversely` either at a high transportation speed orlowffeeding speed with out requiring, reversal of direction Iof rotation of the motor 224. In other words, the truck propeiling mechanism `may be operated at a high transportation speed by `throwingin the clutch 283, 285 and ata low feeding speed by throwing injthegoluton 284, zas. mechanism may be reversed bymeans of thereversing' Vgearing, shown in Fig. 4, without reversing' theidirection of rotation "ofthe motor 224.`
As "clearly disclosed in'Fig` 2, I provide a power respectively which cooperate with clutch elements 285, `'28'6respectivelyhaving andthe countershaft by moving the shaft i Vrotation ofrjtlie shaft 2115 g either at high transportation speed orflow feeding means of the reversing,"
The truck propelling Y ally mounted on the rear bed plate 50 by a shaftv journaledin abearing 326v mounted on anarm pivoted to a bracket 321 carried on the top ofan oil reservoir 328 of the hydraulic control system ofthe loading machine. The drum 325 is adapted to carry` a flexible electrical cable which connects the source of electrical power supplyto the electric motor 224. Rigidlyattachedftc the cable drum 325 is a drive sheave 330 driven by chain 3 3l from a sheave 332. The ratio of the sheaves 330 and 3 32 ,is so selected that the. speed of rotation of the drum 325 will'be sufficient to pick up the` iiexible electrical cable toV prevent,y an accumulation of slack therein even when substan-y tally all of the cable has been paid out, with the ,effective diameter of the cable drum 325 at ay minimum., The drum 325 must rotate at different speeds yrelatively to the speed of travel of the loading machine during the hauling in of the cable due to variation in the effective rdiameter of the drum 325,. To provide for this the sheaves 330 and 332 have smooth surfaces so that the chain 33| anslip with respect thereto. If the drum 325 tends to rotate at a speed too fast for that required to take up the slack in the electric cable, there will be slippage between thechain 33| and oneor both of the sheaves 330 and 332.
Furthermore, the sheave. 332 is a one-way power driven sheave so that when the loading' machine is operating to pay out the electric cable, the tension on the latter is relied on to rotate thevdrum 325, the electric cable being pulled in, ofcourse, under power. Tov provide this oneway drive, the sheave 332 is journaled loosely on a cup sleeve keyed to the shaft 2 15. Pawl and ratchet mechanism between the cup sleeve and the sheave 332 permits rotation ofthe sheave 332 from the shaft 215 only when the electric cable is to be pulled in. It will therefore be seen that when the loading machine moves for-` ward, tension on the electric cable will cause the cable drum 325 to rotate freelysince the sheave 332 maybe rotated vfreely on the shaft by reason ofthe slipping of the pawly and ratchet mechanism.
Secured -te the sheave 332 to rotate therewith is a haulage or towing cable drum 336 (Fig. 2). A flexible steel' cableA is adapted to be associated with' the'cable drum 336, the free end of which may be connected to an anchorage in the mine -extraneous to the loading machine in such position as to cause power rotation of the cable drum 336 to aid the loading machine inrcli'mbing a hill. In general, it is not necessary tov use this flexible steel cable but sometimes severe conditions are encountered, making its use desirable. To effect a driving connection between the drum 336 and the counters'haft 215, the former is provided with ;aws adapted to co-operate with vjaws of a sliding clutch member which is feathered to the end of the shaft 215 and operated by `a shipper.
is directed to the front end of the loader it will,
in addition,v be reeved about the pulley 3451to' extend forwardly along the side of the truck 4|).`
It should also be `noted that the rear crosspiece 46 of the main frame of the truck 40 carries' a guide member having top,` bottom and side anti-friction rolls. The electric cable may besupported on the guide member 35| particularly.A
when it is being paid outby forward movement of the loading machine. ,l
As was previously pointed out, the swinging'of;
`the rear of the motor casing, as shown in Fig.` 2,
and drives a hydraulic pump 351, preferably an oil pump, through a chain and sprocket drive mechanism 358. The pump 351`Vis preferably a relatively high pressure pump capable of producing pressure up `to one thousandY poundsl per square inch andA is mounted upon'the oil reservoiry 328. It will thus be seen that the pump 351` is continuously driven whenever the motors2r24vis operated. 3, y.
It may alsobe mentioned thatl the pump 351l is of such a construction that regardless of its, direction of rotation it will always supplyv pres-l. sure at the same port. tain full control of the machine in the event that the motor 224 is driven in reverse direction.l
may be operated to reverse the direction of yro t`a,`
' tion of the shaft 252 to whichis keyed the pinion As shown in Fig; 2, a' guide pulley 342 is carried by a bracket 343 supported by the bed plate 50 directly tothe rear of the drum Y336, to act as a guide for the aforementioned steel cable.`
.As shown at the lower left-hand cornenof Fig. 2, a pair of guide pulleys 344 and 345 are provided adjacent the rear end of 'thel frame 40,
t'o guide the flexible steel cable from the lrearl of the main frame of `the truck 40 to extend either forwardly or rearwardly.y When thewsteel'cable extends rearwardly it will pass directly from the pulley 342 to the pulley 344,4 and when thecable 212` (Fig. 4). vlt has been found in practice that clutches tend to become Aworn and I have there fore provided improved means t0 compensate for this wear on the clutches 259 and 26'0. Remov ably attached to the operating shaft 269 for the clutches 259 and 260 is a removable extension shaft 43| whichis connected by ymeans of the pin 432 to a rod 433 both endso'f which are' screw-threaded as shown in Figs.' 4 and l2..
To the false` bottom plate 2 49f is welded the` upright cylindrical socket 434 forreceiving the lower end of the vertical shaft bearing 435(Fig. 13) which may be secured to the socketA byV lmeans of the set screw 436. To thev upper portion off reduced diameterof the shaft `bearing435r is journaledby means ofthe bushing 4,31,v the` arms 438, 43B and the spacing block 439.
Keys 44D, 440 are inserted ,between the sparc-f.
ing block 433 and the arms 438, 438l as shown in Fig. 13. By means of the bolts 44|, 44|' the` arms 43B. 438 are clamped to the spacing block to form a single unit. A cotter pin 442 may. be relied on to retain this unit journaled on the stationary or xed shaft bearing 435.` y
The spacing block 439, has extending laterally therefrom an arm 439'.` The aforesaid unit thus.
becomes a bell-crank pivoted for rocking movements on the shaft bearing 435,.
The outer end of the arm 43,9 an opening 543 in the reciprocating plate 444, the upper .and lower edges of which'have `tongue and groove connections at 444, 445 ,with the uppery and lowerv guide bars y443 and',44`|, as `shownin Fig. 10. The upper guidebar446'mayb'e secured to the spacing plate 61 by means vof the bolts This is useful to main-l` extends through f `the front quadrant plate `the outer end of which `and `411 `is t a 4 spacing is horizontal at` the finger 50|)` plate 461 as indicated at 468 in Figs. 81and 10. The spacing plate 461fmayibe secured to the plate 410 by means oftbolts 41|, 41|,` and `the back plate; 410 may be'isecured `to the bottom plate 50,by meansof welding as; indicated at 412 inF'ig/l;V
Thelowerend ofthe lever 443 is `Welded. to 413 which is journaled 414 on the bearing415, is provided with a discshaped `head 416 of enlarged diameter. Also by `means `of `the bushing `journaled on the bearing 415 isa rear quadrant plate 411. Intermediate the quadrant `plates 413 `block 418pwhich `is also journaledby meansI of` vtherbushing 414 on the `bearing 415. The front and rear quadrant plates ,413 and `411 are respectively pinnedV at. 419 and 480 to thespacing block 418, as shownin Fig..l4. Lubricating means may be provided at 48|. The rear end of the bearing 415 `is provided with an annular shoulder`482 which nts against the front side of thespacing plate 461 The rear end of the bearing 4.15 is screw-threaded at- 483.` A nut 484V is screw-threaded `on the rear end `483 to force a-Washer 485 back plate 410 to very securely holdwthe bearing 415 rigidly connected to the plates 4'61 and 410, thereby holding the upper and lower guide bars 446and 441 rigidly connected to the bottom plate 50 shown in Fig..4.
. .By means of l cotter are connected `between pins `486, shafts488, 489 the quadrant plates `413 and 411, `as shown in Figs. 8 and 10.r These shaftsserveas `journal bearings `for `the rollers 490, 49| which are .in position to engagethe cam surfaces 492, 493 `of the opening in thereciproeating plate 444. i' q e Theopening 494 in the reciprocating plate 444 the upper portion,` as indicated at 495.` The lower p ortion of this opening is` also horizontaLas indicated `at 496 in Fig.` 8. `Either the upper horizontal portion'` 495 or'the lowerI `horizont-,al portion 496 will serve to limit the `443 in either e direction `when engage the same. However,
throw of the lever the rollers 490, 49|
it is preferred to provide centering mechanismv at 4911which will also serve to limit the throw of Athe lever 443,l and when` the latter is released such centering mechanism will automatically re-V turn the lever 443 to its4 vertical position.
The centering mechanism comprises -`a bracket plate 498 bolted at `499,499 to the reciprocating plate 444. The plate 498 is provided `with `a downwardly extending linger 500 through which ex tends a bolt 50|. is riveted at 503A tothe guide bar.441.\; A spring 504intervenes thenger 500 andthe head of the bolt 50|, and a spring 505 is locatedbetween the fingerv 500 and the bracket plate 502. `By means oi-a nut 506cm y the threaded end of vthe bolt 50|,
with `the vertical `position ofthe lever 443 and so that when the lever443,is in its vertical or neutral `position ,the `springs will e be counterbalanced. It can-readily be seen that `wlfien the lever ,143 is moved in an anticlockwise direction, asshown in Fig.. 8, thesprng 504 `willtbe-,com-v Dressed, and` when-the lever` `4,43 is released this springwill return the lever vto neutral` position. When the lever 443 is `moved `in a clockwise directionthe spring 505 will be compressedyand when the lever is released, e turn thelev'er to its neutral or4 vertical position. `The `spacing. plate 461` ist provided with. an opening 501 to provide ample `agansttthe rear `side of the e An angular bracket plate502 .i
this `spring will 're,
Space @the inner v 'Bia-77,505
' but the spacing between the ball `may be adjusted in .accordance `portions 525'` uand 526 i friction clutch 259 and ing shown inFigs. 1 and 4 the lower portion of the in Fig. 8; 4to providefadditional bearing for `the `screwthreaded end 483 of the journal bearing as an abutment for fthe annular shoulder482 Shownin Fig.` 14. i l
Between v,thecarms .438, and `439` of the bell crankV leverunitshown; in Fig. 11 islocated a ball bearing abutment device 509,the` upper end 5|0 of `whichtis journaled vinthe arm 433,` the lower endillmbeingvjournaled.in the arm 4385, 'as shown in Fig. 412.
The tau; bearing abutment sus is sudati@ along `therodr 433,1with all parts thereof remainingn the co-relation shown in Fig. 12:`
Y Located within the cylindrcalbody portion 5|2 of the ball bearing unit-509.yis a retaining ring 5|3 whichv has kagperipheral ilange adapted` to engage a complementaryilange on the body portion 15|2,. asshown `in Fig. l2. Fitted within the bodywportion` 512 isythe outer cylindrical ball bearingirace 5|4. VA cylindrical inner race 5|5 is slidable on, the rodi-433. i Between the two races are located the balls |i|6.\ The retaining ring 5|1 isfslidableon therod 433 and has a peripheral ange.. which isd adapted .to `engage a complementary `flange `on `the ring 5|8. By means of rivets 5|9 520,1theringl5l8'is secured tothe body portion 5|?` of the `b all-` bearing unit 1509.. The lattertherefore has its parts in interlocking relationandis adapted to slide as a unit along the rod433 to engageeither. the spring 52| or 522.
As shown` Fig. p12, r abutment washers 523 and 524 are adjustable along the screw-,threaded of the rod 433` by .means of the nuts 521 and 528. Additional nuts: `529 and 530 are. provided as lock nuts to firmly hold `the ball bearing unit 509 the spring 52|` is engaged 17o-move` `the-rod43l `to theleft.;` as viewed in Fig. 4, the operating key-266 will be effective tomove theoperating ring` 265 tothe left to apply the therebyA transmit rotary movement fromthemotor 224fthrough the geartothe shaft 262 in a certain direction... lWhen the ball bearing .unit 509 ismoved toward theright to move the rod 43| towardY the rightas viewed inl Fig. 4, Athe clutch` `260` willbe vapplied toeffect rotation of themshaft 262 Jin theloppositedirection. l l i, It is desirable that .bymeans of the handle 53| the leverw443 may always bemoved inone direction crthe other through aecertain definite angle, bearing unit 589 and. the spring` 52 |1 and the spacingl between the ball bearing unit "iiltyandV the spring 522 are variable and adjustable. ,In other words, a certain amountof` adjustablelost motion is providedin the actuationgof the rod 43| although the .lever 443 isV always moved` through `the same angle-eitherdn oneid-irection or the other. The lost motion between the ball bearing unit and the rod 43|4 is Vinitiallyat amaximum eitherfor Y the applicationoftheclutch 259 or the application of the clutch 260. The lost `motion for each of `these- clutches 259 and 260 `may be reduced as :5 :ends of the shafts 488-4 and 489.` Intermediate the ends of= theopening 501 plate 46-1projects upwardly, as indicated at508 position of the ball bearing unit 509, and as the clutch 260 becomes worn the spring 52| is adjusted to a position closer to the ball bearing unit 509. In other words, as the clutches 259 and 260 ybecome worn, the lost `'motion connections rmay be adjusted accordingly.
1 Movement of the lever 443 in either direction is limited by the roller 490 or the roller 49| engaging the horizontal straight surface 495 Aat the bottom of the opening 494 inthe reciprocating plate 444. It should be noted, however, that at the ends of the horizontal surface 496 the edges curve upwardly to vertical portions 532 and 533. Consequentlyl when the rollers 490 and 49| are moved downwardly along the vertical surfaces 532v and 533, the centers of rotation ofthe rollers will be below the center vof rockingv movement of the lever 443. InV the application of either of the friction clutches 259, 260, either one or the other of the springs 52|, 522 will be under compression and there will be a strong back pressure on the bell crank arm 439' to exert a strong force on ing to move the latter backto neutral position, but when the roller 490 or the roller 49| ismoved below dead center with respect `to the rocking axis of the lever 443, the latter will be held in either of its lower positions and so locked there as to enable the operator to release the lever 443 with the assurance that the frictionclutch 259 or 260 will be held applied. When theA clutch 259 or 260 is to be released, all that the operator needs to do is to release the roller 490 or the roller 49| when it is below dead center position, whereupon 'the centering mechanism 491 will automatically move the lever 443 to its neutral position and ho'ld itthere. i
It should be particularlynoted that the lever 443 need be moved only about vthirty-five kdegrecs in either direction to move one of the rollers 490 or 49| to its locking dead center position. This is decidedly advantageous in a loading machine that is used in coal mines where'the-available space is very limited and the operator desires toV stand between a coal rib and that side of the machine where the lever 443 is located. By limiting the throw of the lever 443 to approximately thirty-five degrees in either direction, the handle 53| may be pulled or pushed 4approximately horizontally with the assurance that the operator can easily move the lever to its locking position or slightly beyond the dead center locking or holding position. As above explained, the throw of the actuating lever 443 in one direction or the other fromits neutral position shown in Fig. 8 will always remain substantially the same, but the extent of throw of the actuating rod 43| must be varied to compensate for the wear in the clutches 259 and 260.`
It should also be noted that when the lever 443 is in its upright or neutral position, as shown in Fig. 8, both of the clutches v259 and 260 will be released or disengaged and consequently the drive shaft 262 will remain stationary. The operating lever 443 may be biased to this upright or neutral position by means of the centering mechanism 491. n l y y Attention is now directed particularly to Figs. 2 and 4 and to the means forrotating the shaft 241 to effect application of the friction clutch 229 to effect a driving of the gathering conveyor chains of the gathering conveyor 4|. This means comprises a lever 448 keyed to the shaft 241l to cause rotation thereof.
Through the lever 448 extends a threaded rod 449 provided with adjustthe reciprocating plate 444 te'ndable nuts 450 and a compression.` spring 45|* held in place by an adjustable nut 452'. The rod 449 is pivoted to an eccentric crank pin,453 the axis of whichis spaced from the axis of the shaft 454 to which it is rigidly connected.- The shaft 454 is journaled in a bearing box 455 carriedby the plate 248. An operating handle 456 is keyed to thershaft 454.
In the positions of the parts illustrated in Figs. 4 and 5, the clutch 229 will be released. By the operator pulling the handle 456 toward him, shaft 454 will be rotated, and threaded rod 449 will be lifted by the crank action'of the eccentric crank pin 453. Through the compression of spring 45| the lever 448 will rotate 4the shaft 241, thereby moving the collar 245 (Fig. 4) downwardly to y*compress the friction plates 238 through the ring 243 and the pins 242. The handle 456 is held in clutch applied position by virtue of the factthat `it strikes'a stop (not shown) carried by thema'in frame of the truck 40, slightly after the lcrank pin 453 passes over its dead center position. It is therefore evident that the clutch 229 will remain in clutch applied position whenv operating nthis position, until it is disengaged byy opera- Y tion of the handle 456.
Suitable means (451, 464, provided on the loadingfmachine for starting and stopping the electric motor 224 and for reversing the same. In the operation of the loading machine embodying my improvements, it may be 'crammed or propelled along the mine track to the place where the loading loperation is to be performed'. During such ltransportation the `drive wheels of the vtruck will be driven at their fast speed and the electric cable will be paid out freely from the cable drum 325. The gathering conveyor will have its front end supported above the track rails. The gathering a'ncirdischarge,y con'- veyors may be controlled yby the operator `who rides on a small platform on the'truck v40 adjacent the various levers connected to valveshjfor controlling the hydraulic motors, particularly to swing the gathering and discharge conveyors as required by the travel of the loading machine along a` curved track in amine. i
Should a very steep incline be encountered it may be necessary to employ a exible steel cable or rope associated withl the drum 336 and reve it about' the two pulleys 344, 345 (FigjrZ) with the free end connected to an anchorage in the mine extraneous to the loading machine. This arrangementis particularly desirable when the traction'feed tends to cause the truck wheels to slip on the mine track.A
When the loading machine has reached the place where the coal is to be loaded, which coal has been previously .dislodged by cutting and 286 (Fig. 2) will be thrown in while at the same time the clutch 265 will be released',-thereby op` erating the propelling mechanism at a slow or sumping speed. The operator will then adjust the gathering conveyor 4| and the discharge con-7 veyor 42, the former by lowering it in contacting relation with the mine bottom in advance of the mine track, and the latter by swinging it for dis-V charge linto mine cars either on the same mine track or a parallel track. f
With the conveyor mechanisms of the discharge and gathering conveyors set into operation, and with the front end of the gathering unit resting on the mine oor in advance of the mine track, the entire machine may be fed forwardly pro- 466, Fig. l) may be up-in accordance wi `site directions. of the gear254clockwise and the movement of vidingr a `frenan attackl ofthe `gathering con- `'vey'o'rfli on the coal fatthe bottom ofthesemicompact mass of dislodged coal to be loaded. Y The gathering flights operate not onlyto gatherf the coal rfrom the minebottom but also to tear apart *and lo'osen up the semi-compact mass which then moves 'forwardinto the-mine chamber, necessi-` "tatingfrequent'retractions of thewhol'e machine "along themine track. With the electricmotor 224 continuously operating in the same direction,
`the gathering conveyor may bereciprocated 'to umore efdciently effect loading of the coal, byoperating the reversing clutches 259 and 260 `of "Figi In other wordsywith` the electric motor 224 continuouslyoperatingin the samedirection, vtheoperator may move the lever 443 'in eithei` direction from neutral position to efectoperation ofthe reversing clutches 259 and 260 tofeflect reciprocations of thegathering" conveyor `during loading operations. During such reciprocations i of'thelgatheringconveyorthe clutch 286 (Fig. 2i)
maybeieft in appiied'rposition so as .to effect the slow mover'nentof` the `truck"proi'oelling mechaing upon the extent of reciprocations of themining `machine along a mine track, the electric cable onythe drum 325 may be paid out orV wound ing machine. i i
A* general reviewoff'theconstruction and operationVoffthe loading machine shown in the accompanying l drawings" vwill demonstrate more tain theA mostflefficient operation in loading' coal draulic motor I02"(Fig. 3) `thefrontend ofthe gathering conveyor may be adjusted in' elevation.
`The whole loadingmachine may be transported along the mine track under control of theoperator'who maystart or stop or reverse-the elec- 'tric motor 224 by `means i of suitable controlling 'mechanism (451,146`4,` 3466, Fig'l) connected thereto. Inasmuch f as the power transmission `mechanism between the electric motor 224 and the-gathering and'discharge conveyors is iniixed relationito'the latter, itisnecessary for theop- `erator to start the motor` 224 in `the` proper di-` rection.L In order` to" secure upward movement of :the adjacent flights'along the central trough ,"ofjthe gathering conveyor unit, the sprockets at the', upper ends ofthe shafts must rotate in oppo- This necessitates the movement thegear125l anti-clockwise." Therefore the gear 241)(1ig.` 1) mustmoveclockwise as viewed in plan; and to secure such rotation the armature shaft 225 `mustrotate;'clockwise when viewed from the right-hand end'thereof in Figi 1,
Since@ the gears 221, 240 and 236 rotate to# gether with the shaft 230 `whenfthe clutch 229`is applied. the gear 236 will `be rotated clockwise as viewed iniplan in Fig. 1. As shown in Fig. 2, the sprocket 291 is: located on the left-hand side of the loadingmachine looking forward, and consequentlyA when the gear 236 rotates clockwise; as viewed in plan, the :gear y258wi1l eiect clockwise rotationA of :the shaft 262, as viewed in Fig.1.
'I 'hisisthe proper rotation `forcausing the sprocket chain `302 to rotate the sprocket |89 in. a clockwise directioniv asviewediinFig. 1, to drive the conveyor chain |6501? the `discharge.conveyor 42 th the movements of tlieloadin the proper direction for discharging the coa'l into"mine cars.
During normal operation `of the gathering conveyor and discharge conveyor the operator has no occasion for reversinggthe motor 224, but if the gathering nights become stalledlin the semi-compact mass of coal adjacent the coal wein, it'sometimes` is desirable to` reverse the elec in order to assist in releasing the coal nights from During loading operations, the electric motor'224 should always be operated-in such direction as to effect proper direction of the coal mass.
travel of the gathering conveyor and the discharge conveyor, the reversing clutches 259 and 260 of Fig. 4` being then relied `upon to effect reversal of travel ofY the whole loading machine along the mine track. i
The truck propelling mechanism comprises power transmission mechanismbetween the electric motor 224 andall of the wheels 01j the truck. This power transmission mechanism is primarily under the control ofthe main friction clutch 229 shown in Figs.` 1 and 4. The operator may apply or release the clutch v229 by means of the lever 456 as shown in Fig.` 5;^ The truck i propelling power transmission mechanism also includes the reversing clutches 259 and 260 shown inFig.`4, either of which may be applied by the operator actuatingithe lever 443 in `onedirection or the other, as shown in Figs. 2 and 3, and consequently the floading machine during operationimay be moved along the mine track in either direction `without `reversing the electric motor `224 but even if the electric motor 224 is reversed for the purpose above explained, the loadingm'achinefmay 'be moved in either direction along the minetrack at any time by means of the reversing" clutches ,i
259 and 260 of Fig.` 4.
When the shaft 262 of Fig. 4 is rotated in one direction or the other, the pinion 212 thereon sprocket 293 on the shaft 215` connects the latter Withtheaxle 51, as shown in Fig. 2. It will thus be seen that the electric motor 224` may be continuously operatedin the same direction, while by means of the clutches 259 and 260 `of,Fig. 4
the `gathering mechanism maybe moved forwardly or rearwardly under the control of 'the op-` eratolpandV such forward or rearward movement may be at relatively fast speed or relativelyslow speed under the control'ofthe clutches 2B5and 236 of Fig. 2; A slow, powerful sumping movement into the semi-compact mass of shot down coal may thus be effected, andwhenever desired la slcw powerful withdrawal movement of the gathering mechanism may beeiTectedL The starting and vstopping of the pair of end` less chains SI ofthe gatheringconveycr are controlled by the mainclutch 229 shown `inliigsl and 4. During normal operation of the" gatherling lconveyor the ightsthereofvmove `in pairs toward the discharge conveyor `unit 42l and therefore the motor 224 should be continuouslyloper- 'atedfin the same direction.l If there isy an overloadgontl'ie'y gathering conveyor chains .due to contact between the flights thereof and the solid or irremovable coal caught between the conveyor and roofof the mine chamber, the friction clutch I 4trolled by themain motor 224 to secure proper direction of rotation of the shaft |98 to move the discharge conveyor along the conveyor trough 11| to convey material rearwardly into the `mine car. It should be particularly noted by reference to Fig. 4 that notwithstanding the association of thelclutch 259 with the bevel gear V253 and the shaft 252, the sprocket 291 mayalways be rotated in th'e same direction when the motor 224 is rotated -in a'lgiven'direction. v
The cable reel 325 may be operated by power to wind up the electric cable thereon, this cable containing the insulated Wires connecting the motor 224 to the distant source of electric power supply. 'The pawl and ratchet mechanism above referred to, permits the paying out of ythe electric cable as the -loading machine movesforward along the mine track.
f When the shaft 215 (Fig. 2) is rotated in a clockwise direction as viewed from the Vrighthand side of the machine the truck wheels are also being rotated to obtain, if possible, traction feed. The rope drum 33B and the truck propelling mechanism, therefore co-operate to secure very powerfulforwardfeed of the machine particularly when the nose of the gathering conveyor `unit is to be forced into a semi-compact mass of y shot down coal to be loaded.
When the shaft 215 is rotated in an anti-clockwise direction as viewed fromk the right-hand side of the machine, the truck wheels will be rotated to retract the machine along the mine track, the steel cable on ythe rope drum 336 will be paid out and the pawl and ratchet mechanism will drive the rope drum 325 to wind up the electric cable thereon.
When the shot down coal at the coalface is vto `be loaded considerable power may be necessary to ram the nose of the gathering conveyor along the mine bottom into the tight coal, Iand for this purpose the traction of the wheels I', 56 may be insufficient and under such conditions the use of the rope drum 336 and a wire cable anchored extraneous-ly tothe machine may be advisable. However, it should be understood that in order to protect the truck propelling mechanism the clutches 259 and 26!) may each be set `to slip when the load on the clutch reaches a predetermined limit.
The clutches are individually operable and the actuating mechanism for each may be individually adjusted. Each clutch is yieldingly applied and each maybe set to slip upon reaching a predetermined load. Therefore, by reason of the springs 52| and 522 the regulation of slippingA at certain loads may be sufficiently sensitive to more eflicientlyfprotect the propelling mechanism.
It will thus be seen that the adjustment of the lost motion connections between the ball bearing unit 509 and the springs 52|, 522 is not only for Y stances the factor of reason of the springs usmall sogas to maintain a high factor of f Having thus described asf/:7,505
the. purpose of taking up wear in the. friction .clutches from time to time but also for the purpose of regulating the point of slippage of each clutch in` accordance -with the load on the clutch. Under normal conditions slippage of the clutches may .occur when the loads thereon are relatively safety. Whentheshot Adown coal remains standingin a semi-compact mass, the slippage may be setfor a relatively large load, particularly when the gathering mechanism is moved forward into such semi-compact mass, .although under such circumsafety may be lowered.iA By 52|, 522 the adjustments of thepoints of slippage may be varied over a wide range. Of course, when either clutch slips the operation of the propelling mechanism is discontinued and. movement of the loading machine along the mine track stops.
Obviously thoseskilled in the art may make various changes in the details and arrangement of parts without departing from'the spirit and scope of the invention as vdefined by the claims hereto appended, and I therefore wish-not to be restricted to the precise construction'herein disclosed. a 1 and shown an embodiment of my invention, what I desire to secure by Letters Patent of the United States is: y 1. In a machine of the classdescribed, the combination with a driven shaft, of reversing friction clutches associated therewith, mechanism comprisingI a rod movable axially of said shaft for applying said friction clutches, an operating lever, mechanism comprising dead-center means for limiting each movement of said lever to its opposite-positions from neutral to substantially -less than 90 and locking said operating leverat its limiting positions, and connections comprising adjustable abutment'mechanism on said rod Vfor cam device to reciprocate rectilinearly, means on said lever in position to engage said cam device to move the same rectilinearly when saidlever is moved onits pivot, mechanism limiting the movement of said engaging means to a, position just beyond dead centerv relative to the pivot of the lever to effect locking of the latter just beyond such dead center position, and clutch actuating mechanism between said cam device and said clutch. l f
3. In a machine of the class described, the combination with a clutch, of a pivoted operating lever, a movable cam plate, mechanism for guiding said plate for movement along straight lines, means on said lever for engaging said cam plate to move the same rectilinearly in opposite directions, mechanism limiting the movementv of said engaging means to opposite positions beyond dead centers relative to the pivot of the lever to effect locking of the latter adjacent such dead center positions, and clutch actuating mechanism between said cam plate and said clutch. i
4. In a machine of the class described, the combination with a clutch, of a pivoted operating ylever, a cam plate, mechanism for guiding said cam plate for rectilinear movements in oppositedirections, means on said leverfor engaging said cam plate, actuating connections between said cam plate and said clutch, means for' effecting locking means. A
lever, a cam plate having an opening 2,377,505 e locking of the lever in clutch applied position, and
resilient means for automatically returnmg said levelv to initial position when released from said 5.. In a machine` of the class described, the combination with a drivingshaft, of a driven shaft,
reversing mechanism comprising spaced i friction device and said driven shaft, said lconnections in-A cludinga rod movable axially of said driven shaft in` opposite directions to effect application of either of said friction clutches and said connections also including adjustable abutmentmechanismon said rod for varying the extent `of movement ofsaid axial actuating device to compensate for wear in the clutches. v
, 6. Ina machine bination with reversing clutches, of a cam plate having a relatively large opening therein affording l spaced'opposite cam surfaces, a pivoted actuating lever, spaced-apart actuating devices carried by said lever for respectively engaging said opposing j cam surfaces and `servingto move said camplate in opposite directions when said lever is moved in `opposite directions,- and connectionsbetween said cam plate and said clutches forapplying the latter when said lever is actuated.` f l e 7. In a machine of the class described,the com.- bination with spaced clutches, of
therein relatively wideat one portion and narrower at an-` otherportion to `afford opposing cam surfaces, spacedfapart cam engaging devices on said lever at the `relative wide portion of said opening when the lever vis in neutral position, mechanism for` guiding the cam plate in opposite directions when shifted by movement of said cam engaging devices in opposite directions to the narrower posi-` e tion of said opening, and connections between said plate and said clutches to `eiect operation. ofthe latter when said plate is shifted.
bination with spaced 4friction clutches, of `an actuating rod movable axially of said friction clutches to apply the same,` spaced-abutment nuts threaded on said rod, buier springs associated withl said abutment nuts, a` bell-crank one arm of which is in position to engage either of said buffer springs tomove said rod axially,` a cam plate having an opening to receive theother arm of said bellcrank, an actuating lever, rollers carried by said lever in position. to engage Opposing cam faces in said plate, and means for limiting the throw of said actuating lever in opposite directions to 106king positions just beyond dead centers so that when said actuating lever is released the applied clutch will not be released. l c l 9. In a machine of theclass describedthe comofthe dass described, the eonian actuating l 8. In a machineof the class described, the com-j ing means to a position just beyond deadcenter relative to `the pivot of the lever to effect locking ofthe latter just `beyond such dead center` posif tion, and lclutch actuating .mechanism betweenv said cam ,device and said clutch. e
- 10. In a machine ofthe class described, the combination with `a; friction, clutch, of i means comprisingan axially vmovable rod for applying said clutch, an abutment `mounted on said rod for adjustment therealong, and mechanism compris` ing an actuating device spaced from said abutment but movable along said rod into` engagement with said abutment to effect axial movement of saidrod `and the application of said clutch, the construction and arrangement being `such that such actuating deviceyhas a predetermined lost motion from neutral before engaging said abute `ment, to apply said clutch. t
11.111` a machine of the class" described, `the combination with a frictionclutch,` of mechanism comprising a. pivoted lever for applying said clutch, an actuating plate, mechanism forguiding said plate for reciprocating `movements ina plane extending transversely of the planein which said lever is movable, an actuating lever, mechanism supporting saidactuating lever for pivotal move ment in aplane parallel to said plats and transf versely ofithe plane of said rst-named lever, and
adjustable clutch pressure `mechanismrfor transmitting movementfrom said first-named lever to applysaid clutcnvariably. l l
12. Inga machine of-the class described,` `the I combination with a drive shaft, of a driven shaft, reversing mechanism` between said shaftscomprising two friction clutches, meanscomprising anaxially` movable rod for applying said clutches, l
spaced-,apartabutments `mounted,V o-n said rod each for adjustment therealong, and mechanism" 4 comprising an actuatingdevice betweensaid abutl ments andv movable valong said rod into engagement with either of said abutments to apply one of saidclutches, the construction and arranger ment being such that such actuating device when in neutral position `is spaced from both `of said abutment devices and has predetermined lcst1n0` tions from neutral before engaging `said abutments to apply said clutches. i
13. In a machine of the class described, the combination with afriction clutch, of means comprlsinga rod movable axially to apply .the
l clutch, an abutment mounted on said rod, an acbination with a driving shaft, of a driven shaft,
a clutch adapted to connect said shafts, a pivoted` operating lever, a movable cam device, `mechanism` guiding said cam device for movement rectilinearly, means on saidleverin positionto engagesaid cam device `tomove the` same rectilin-` early when said lever is moved on its pivot, mechanism limitingthe.- movement of saidengagtuating unit mounted Aonsaidrod to slide along the same toward and from saidabutment, and means for sliding said ,actuatingunit along said rod to engage said abutment to elect axial movement of said rod and the `application of said clutch. i i
`14. In `a machine of the class described, the combination with a ldriving shaft, of a driven shaft, -means comprising two friction clutches for connecting said shafts forl operation of the drivenshaft in reverse directions, an operating lever, an
actuating rod connected to said friction clutches,-
an .actuating abutment connected to said lever and .slidable along said rod, resilient abutments on saidtrod on opposite sides of'said actuating abutment, and means for operating said lever to slide said 4actuating abutment along said rod against either of said resilient abutments and thereby secure, axial movement of said rod and,
the, applicationof one ofsaid clutches.
15. InV a machine of the class described, the
combinationwith a friction clutch, of a cam defvice comprising a cam plate having an actuating.
cam surfacefmerging into a locking` cam surface,
, tion and arrangement being such that when the locking cam surface is engaged as aforesaid the said engaging means is at or beyond dead center relative to the pivot of said actuating lever.
16. In a machine of the class described, the combination with a friction clutch, of anoperating lever, a cam device comprising an lactuating cam face merging into a locking cam face, mechanism for guiding the actuating movement of said cam device, operating connections between said cam device and said mechanism on said operating lever in position to engage said cam faces one after the other when the lever is moved through an angle of about thirty degrees, and means for pivotally mounting said operating lever in position to enable said locking surface to establish a dead center holding position for said lever.
1'7. In a machine of the class described, the combination with a clutch, of a cam plate having an .actuating cam surface and a locking cam surface, an actuating lever, mechanism for supporting said cam plate for actuating movement, operating connections between said cam plate and said clutch, means on said lever for engaging said cam surfaces one after the other to effect application of the clutch and the locking thereof in applied position, mechanism pivotally mounting said lever in position to effect dead -center locking of said lever when said engaging means is associated with said locking cam surface, and means at one end of said locking cam surface for limiting the throw of said lever to approximately thirty ldegrees from neutral position, the construction and arrangement being such that notwithstanding such limited throw of said lever the said engaging means is associated with said locking cam surface to provide a dead center connection relative to the pivot of said lever to hold the latter in its clutch applying position after being manually released.
18. In a machine of the class described, the combination with clutch mechanism, of an actuating lever, a cam plate having an actuating cam surface merging into a locking `cam surface, a cam engaging device on said lever, mechanism pivotally mounting said lever'in position to enable said cam engaging device to co-act with said locking cam surface to hold such device'at dead center relative to the pivot of said lever, mechanism for guiding said cam plate in opposite directions in accordance with the position of said cam engaging device, and operating connections between said plate and said clutch mechanism.
19. In a machine of the class described, the combination with a friction clutch, of mechanism comprising a rod connected to said clutch to applyr combination with spaced friction clutches, of an actuating rod movable axially of said friction clutches to apply the same, spaced abutments on said rod each adjustable along said rod'to various positions thereon, an actuating device between said abutments and spaced from both of them, an operating lever, mechanism limiting the throw ois'aid lever through a predetermined angle, and mechanism between said lever and said actuating device to slide the latter along said rod into engagement-with said abutments, the construction and arrangement being such that when said Alever is moved through a predetermined angle one vof said abutments will be moved to vsuch extent as will take up wear in the clutch andapply the latter with a force predetermined by the adjustj ment of the corresponding abutment alongsaid lli'.
l cation of said clutch l i 24. In a machine of the class described, the
rod. v f
21.4In a machine of the class described, the combination with a vfriction clutch, of means comprising a rotary rod movableaxially to apply the clutch, an abutment mounted on said rod and adapted to rotate therewith, an actuating unit mounted to rotate on said rod and to slide along the same toward and from said abutment, vand means for sliding said actuating unit axially along said rod to engage said abutment-to effect axial movement of said rod and the application of said clutch. y
22. In a machine of the class described,V the combination with a friction clutch, of means comprising a rotary rod movable axially to apply the clutch, an abutment mounted on said rod, a ball-bearing actuating unit mounted to rotate on said rod and to slide along the same toward and from said abutment, and means Ifor sliding said ball-bearingactuating'unit along said rod to engage said abutment to effect axial movement of said rod and the application-of said clutch, the
construction and arrangement being suchr that when the clutch is applied ythe sliding means is stationary while said rod and said ball-bearing unit rotaterelatively to said sliding means.
23. In a 'machine of the class described, the combination with a friction clutch, of means comprising a rod movable axially to apply" the clutch, an adjustable resilient abutment on said rod, an actuating unit mounted on said rod to slide along the same toward'and' from said re- 1 silient abutment, said actuating unit when in neutral position being spaced from said resilient abutment, andmeans for sliding said actuating unit along said rod to engage said abutment to effect axial movement of said rod and the applicombination with ay clutch, of a cam device hav- 1ng an actuating cam surface and a locking cam surface, an actuating device, mechanism for supporting said cam device for actuating movement,`
operating connections between said cam device and said clutch, said operating connections being separate from said cam surfaces, means on said actuating device for engaging said cam surfaces one after the other to effect application'of they clutch and the locking thereof in applied position, mechanism mounting said actuating device in position to eiect such locking, and means at one end ofl the locking cam ,surface for limiting the throw of the actuating-device from neutral position; the construction -r and arrangement being such that when said actuating device is at the limit of its throw from neutral said locking of the"y appli-cation of the clutch will continue even after said actuating device is released.
e 2,377,505 "25. In a machine of the class described, the` combination with a, driving shaft, of a driven v shaft, reversing `mechanism comprising spaced friction clutches between said shafts, an operating lever pivoted for movements of substantially less than 60 in either direction from neutral position to either one of two dead center positions,
means for applying either clutch comprising an additional lever, adjustable lost-motion take-up mechanism between said additional lever and said friction clutches, a plate having two openings therein one for receiving one arm `of said additional lever, the other opening having spacedapart cam faces, and transmitting connections positions of the operating lever but the extent of application of the clutches may vary individually according to the adjustment of said lost-motion take-up mechanism.
26. In a machine of the class described, the combination with a drivingshaft, of -a driven shaft, power transmission mechanism between said shafts comprising a clutch, a pivoted operating lever, a movable cam device having a cam opening therein, mechanism for guiding said cam device rectilinearly, means extending from said Cil operating lever into said cam opening for effecting movement of said cam device rectilinearly and the locking thereof slightly beyond a deadcenter position relative to the pivot of the lever, and clutch actuating mechanism between said cam device and said clutch. Y
`2'7. In a `machine of the class described, the combination with ashaft, of means comprising friction clutches for effecting reversal of rota-` tion of said shaft, an operating lever, a cam device having a cam-faced opening therein, means connected to said lever and extending into said cam-faced opening in position toco-act with the ends of opposed cam faces of said opening to limit the throw of said lever in either direction from neutral position,- and lost-motion operating connections between said cam device and said clutches, said last-named connections being adjustable to effect a variation in the application of the clutches in accordance with the wear thereof and thereby secure regulation of the slipping of said clutches when a predetermined load thereon is reached. j
2s. In a machine of 'the class described, the
combinationrwith reversing means comprising e two separate friction clutches, of a manual operating lever, a cam plate, means between said lever and a cam-faced openingin said plate yfor limiting the throw of said lever in either direction from neutral and locking the same in either positionspaced from neutral, and actuating mechanism between said cam plate and said friction clutches for applying the latten said actuating mechanism being adjustable for each of said clutches `to vary the pressure applied to each clutch independently of the other, the construc' tion and arrangement being such that for a predetermined movement of the operating lever in eitherdirection from neutral the throw of each clutch will be in accordance with the wear thereof to secure the desired applied pressure on each clutch independently of the other.
29. In a machine of the class described, the` combination with a driving shaft, of a driven shaft, means comprising a friction clutch for connecting said shafts,a cam Vdevice comprising an actuating cam surface merging into a locking `camA surface, an actuating lever, operating mechanism between said cam device and said clutch,
means on said actuating lever to engage said cam surfaces, and mechanism for pivotally mounting said actuating lever position to enable said engaging means to move along said cam surfaces successively to first apply the clutch :and then lock it in applied position at or beyond dead center relative to the pivot of said actuating lever.
30.` In a` machine of the class described, the combination with a driving shaft, of a driven shaft, reversing mechanism comprising friction clutches associated with said driven shaft, mechanism comprising a rod in alinement With and movable along the center of the driven shaft axially thereof for applying said friction clutches,
an operating lever, mechanism comprising deadcenter means for limiting the movement of `said operating lever to its opposite positions from neutral and locking said lever in its limiting positions, and connections between said lever and said rod comprising -adjustable abutment mech- `EDWARD G. LEWIS.
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