USRE13072E - Clutch - Google Patents

Description

E. C. SMITH.

GLUTGH. APPLICATION FILED 00T. 18, 1909.

Reissuea Jan 4, 1910.

`shows in vertice UNITED sTATns ijirENT ERNEST C. =SMI'1H, OE ANTON,ILI1INOIS,

CLUTCH,

original Nm-916,372 Ydated March 23`,

le it 'known' that l, -EnNns'T C! SMITH, a citizen of 'thefUnited Statesf-and resident of `Canto'n, county ofcFnlton, Stateofilllinois," `have`inve1ited certain new and useful Improvements in Clutches, :of which the' follow 'ing is al specification, whi'chare'illustrated in the accompanying -ing a part thereof.

drawings', form- 'The invention relates kltb clutchesE for use in power transmitting f'maehinery lfor releasably' connecting a` rotatably :drivingfand a` driven member, and itv has been divided out of my cti-pending.application for patent on;

"fertilizerdistributors, Serial Number 287.,-`

718, filed November 16,'1905.

YMore specifically the invention relates to those clutches for releasably connecting. a: Idriving and a driven member whereinone of such members isa' rotatable shaftand the shiftable member sof the clutch is `fixed against rotation on the shaft. v y

Heretofore it has been the customary practice kto operatively connect the 4shaft and shiftable clutch member of devices of this kind by ,a Spline and groove. :It is well known, however, that when the' .members so connected are employed for transmitting great power the spline is Lcaused yto -bind in the groove, thereby presenting. so. much' fric tional resistance tothe shifting ofthe clutch that thisis effected with great difliculty and sometimes rendered quite impossible.

A feature ofthe present vinvention contemplates a shiftable clutch member slidably mounted upon a driving shaft and fixed against rotation thereon by means of'adog rigidly secured to ythe shaft and having a slid able engagement with the clutch member. One of the ob]ectsof the invention is to provide a clutch which shall be of simple and efficient const-riliction'and so'arranged that it maybe released from its power transmitting position with but little effort.

detail ofthe invention provides a clutch adapted to play between two power transmitting members with either of rwhich it may be separately engagedfand having an intermediate position in which `it is disen gaged from both, while automatic means are ro'vided` for shiftingv the clutchl member rom lone eXtreme-position to-Ithe other. In the accom anyingdrawings: Figure l llongitudi-n'al section aclutch Specification of ReisSued-,Letters Patent. leisrsuedutn, 4, 1910,

Application -for reissue ".led October =16,

- embodying the invention AsFig. 2- isav transverse sectionalA view ofthe saniefztakenon `the`l line 2N2, ofFig. 11; Fi'gQ 3 is ya detail yplan section as viewed fromy the' line '3-3, of Fig.' 2 ;']3`ig.4r4 is a'detailface view of one of lthe clutchA members :Figs and G are sectional views'ctaken on the. line 5-:5,Fig. l, Fig-6 being' viewed from the direction indicated by thefarroivs designated 6,' 6;iFig. 7 lis -a detail; plan sectional view taken onv the line 7-7, ofFig. Gylig. 8 shows in side elevation a-f'detail of themechanism.provided `for shifting the cluteh;'1 `ig. 9 is a front elevation of1 the `mechanism" illustrated in Fig.

8 Fig: 10 showsin verticalf longitudinal section ai fertilizer distributer wherein the clutch `illustrated MinFigs; l to 9-inclusive is em- .ployedifor controlling its operation; and, Y F ig; 1l isla detail plan 'View of rthe Edistribu- *ter illustrated inFig. 10. j

Adetailvof arotatable driving shaft is illustrated "in 'the drawings at 115. .As shown,` this-shaft is` the rear aXleuof affera-pplication for patent heretofore mentioned, out of .which this invention has: been divided. The distribute-r comprises a hopper tilizer distributerlike that described. 'iny .my

'16"having-'front and rear carrying Wheels rdesignated-17,18 respectively, and a movable 'bottom'19- l The bottom of the hopper is carried by'endless chains 20 each turning over sprockets 21, 22 .adjacent the front and rear ends'of tliehopper and the axle l5 extends transversely beneath the i hopper where =it is journaled in bearing blocks, as 23,' aiid'is rotated by the rear carrying wheels for -iiioving 'thel hopper'` bottom 19 whenjthe vdistributer is drawn over the ground. 'The operative connection between y the driving 'shaft l5- and the hopper .bottom 19 comprises a variable speed gear 24, which,

-as`sliown,' is loosely mounted ontlie driving shaft adjacent the hubofone-of the carrying.\vhee1s` 18 and a Worm sl-iaftQG which is journaledin .a bracket 29 secured to the hopper frame` and carries a'fgea-r pinion 25 for engaging the variable :speedgea-r 24 and a Worm 30 for engaging a-wormy wheel 2T .mounted on a shaft-'2.8which-carries1the `sproeketwheels 22a't therear Aof the hopper. ""'jThe `Clutch provided by; Ltlie'invention. isv employed. vin v-tlie apparatus; just I described for establishi- =a n riving `conn ection`. betweentheeh f 15-endthe`variab1e speed vprovided and Yis adapted to gear 24 for 'turning the ear in either direction. As shown, a shi table clutch membcr 3.1 loosely mounted on the shaft 15 is lay between the hub of the varia le speed) gear 24 for directly connecting this gear to the shaft and a sprocket `.Wheel. 32. The sprocket wheel 32 has gear connection with the variable speedgear 24 for reversely rotatin it, clnmprising a countershaft 33 journale in t e 32 by a sprocket chain 35 and with the variable speed gear 24 through a gear 36 mount-l ed on the countershaft and meshing 'with gear teeth formed u on the hub of the variable speed gear. , lut'ch teeth 38 and 39 most clearly shown in Figs. 4 and 5 ofthe drawings are formed upon the hub of the variable speed gear 24-and upon vthe face of the sprocket wheel 32, respectivel and clutch fingers 40 and 41 are provide upon.

the vends of the shiftable clutch member 31 for en aging these clutch teeth.

A 50g rigidly secured to -the driving shaft 15 is employed vfor reacting upon the shiftable clutch member 31 to rotate it with the driving shaft. Preferably two such dogs are provided one for engaging 'the .the varia vclutch fingers 40 and 41 at each end of the clutch member 31. As shown, these dogs are secured to the driving shaft 15 by pins, as 44 and l'45. The dog 42 is most clearly'y shown in Figs. 1 and 2 of the drawings and preferably takes'the form of bushing surroundin the driving shaft 15 and turning within t ebeari'ng block 23. As shown it is provided Awith apertures 46 for receiving the clutch fingers 40. The dog-43 is most clearly shown in Figs. 1 and-6 of the drawings and preferably takes the form of a collar which incloses the shaft 15 and is provided With arms 47, 48 for bearing upon the clutch fingers 41 of the shiftable clutch member. In order to facilitate the shifting of the clutch, the apertures 46 provided in vthe bushing 42 for receiving the clutch fingers 40 and thevarms 47, 48 formed upon the dog 43-for engaging the clutch fingers 41 are providedV with anti-friction rollers '49.

The variable speed Agear 24 and the i sprocket wheel 32, while normally free to racket 34 adjacent the driving shaft 15 and operatively connected with the sprocket member`53 which preferably takes the form of a bell crank lever pivotally attached to the bracket 34 at 5 4, is provided for shifting the clutch member 31,'the shorter arm of the bell crank being of yoke form to straddle the clutch member, and the arms of the yokebeing provided with inwardly directed studs 55 and 56 for en a ing a circumferential groove 57 forme -iout the body of the clutch member. 1

Means 'are provided'for4 manually shifting the clutch to any one of its ositions and automatic means are provided or shifting theclutch from one extreme position to the other. As shown, ahand lever 58, illus- .trated in detail in Figs. 8 and'9 of the drawlngs, and having a spring-controlled pawl .y 59 which plays over avquadrant 60 is provided adjacent the forward 'endA of the machine and is connected b a rod 561 to the free end of the bell cran levei` 53. Preferably the pawl 59 takes the, form Zof a roller and the quadrant 60 is providedwith rounded notches 62, 63, 64 v:for-receiving the roller, the notches 62, 64 being" prop-4 erly placed upon the quadrant for retaining the hand lever 58 in those positions corresponding to the two f extreme -positions of the clutch member 31 andthe notch 63 being adapted to retain the hand lever in .l

fan intermediate position corres onding to the intermediate position of the c utch mem.-

:ber` 31. In order that the hand lever 58,

T,when rapidly shifted,'may be moved in one direction fromone extreme position to. the` other without raising the awl 59'the'notch 163 is guarded at one side y, a shoulder-65,

For automatically shifting thehand lever 58 with sufficientforce to causethe'p'awl 59 to lea over the notch 63aspring, as 66, is'

rovi ed which is adapted to b e compressed n As shown,

)y a moving part of the machine. the spring 66 is coiled about the ship er rod 61 and reacts between a stop 67 fix in fposition on the-'shipper rod anda movable contact piece 68 slidably mounted on the shipper rod in the path of the forward edge 69 of the movable hopper bottom. YThe usual grip lever 70 'pivotally attached tothe hand .115

ever\58 and connected to the pawl.59bya rod 71 is .provided for lifting the pawl when -the lever 58 is to be manually shifted for operating the clutch. l l l By means of the invention a vclutch is provided Which may be easily shifted yeven though reat ower beA transmitted thereby. Each o the logs 42 and 43 bears directly l upon the side of the clutch member 31 in 'the direction ofits rotation and the parts' therefore cannot become bound together nor,-

cramped in position by the pressure developed 1n the transmission of power.

As'` shown, the clutch memberv 31 maybe 1 automatically shifted out yof vdriving engagement with the variable speed gear to an able hopper intermediate position by Aa stop 73 carried' by one of the sprocket chains 20 for engaging a pin 74 provided at the foot of the hand lever 58 and projecting into the path of the Sto 1 When t e contact piece 68 is engagedby the advancin forward edge 69of the movottom, the springGG is compressed until it reacts upon the sto 67 with sufficient force to displace the paw 59 from the forward notch 62. of the quadrant 60.. The expansion of the spring G6 then servesl to swing the hand lever 58 backwar'dly with sufficient force to causetlie pawl 59 to clear the intermediate notch G3 of the quadrant 60 and to reach the notch 64, whereby the lever is .retained in its extreme backward position corresponding to a reversed position of the clutch. f

I claim as. my invention-' 1. In combination, a shaft; a pair of wheels loose on the shaft; a "clutch fixed against. rotation on the shaft and reciprocable between the wheels; manual means for shifting the clutch to its extreme or intermediate positions; and automatic means for shifting the clutch from one extreme position to the other, including a spring for moving the clutch lover the intermediate p oi sition, said spring being compressed by a moving part of the mechanism prior to the y shifting.

2. In combina-tion, a driving shaft, 'two wheels loose on the shaft, adjacent faces of the wheels being ada ated for engagement by it clutch, .ai sleeve sli'dably mounted on the .shaft between the wheels and having clutch fingers vextending toward each of 4the wheels, the arrangement being such that when the sleeve occupies its mid-position its clutch l'fingers are disengaged from both of the wheels, a-dog fixed to t-he shaft between the sleeve and each of the' wheelsand bearing on the fingers, and automatic means controlled by mechanismA driven by the Wheels for shifting the sleeve from one extreme position to the other.

3. In combination, a driving shaft, two wheels loose on the shaft, adjacent faces of the wheels being adapted for engagementby a clutch, a sleeve slidably mounted on vthe shaft between the wheels and having clutch fingers extending toward each of the wheels, the arrangement being such that when the sleeve occupies its mid-position its clutch fingers are disengaged from both ofthe wheels, a dog fixed to the shaft between the sleeve and each of the wheels land bearing on vthe fingers, a detent engageable by a l moving part of the mechanism driven by the wheels, and elastic connection between the detent and the sleeve.

4. In combination, a shaft, a pair lof wheels loose'on the shaft, a clutch driven by 4 the latch.

the shaft and reciprocable betweenl the wheels, a latch for securing the clutch in engagement Avwith one ofthe wheels, and a.

spring adapted to be `compressed by a mov- 4ing part driven bythe said wheel for releasing the latch and 'moving the :clutch into engagement lwith the other wheel.

5. In combination,l a pair of -'rotatable members, .a clutch driven by oneA of -sucli members and movable into and out of engagement with the other, a latch for securmg the clutch in engagement with the lastnamed member, anda Contact piece adapted to be engaged by a' moving part driven by the said last-named member for releasing 6. In combination, a pair of rotatable members, a clutch driven by one of' such membersl and movable into and' out of engagement withthe other, a'latch for .securing the clutch in engagement with the last-v named member, and a contact piece adapted to be engaged by a moving part driven by the said last-named member for releasing the latch and moving the clutch.

In combination, a pair of rotatable members, a clutch driven by one of such members and' movable into and out of en agement with the other, a latch for securing the clutch in engagement with the lastnamed member, and a spring-returned con! tact-piece adapted'to be engaged by a, moving partdriven by the said last-named member for releasing the latch.

. 8. In combination, a pair of rotatable members, a clutch driven by one of such members and movable into and out of engagement with eachother, a latch for securing the clutchin engagement with the last-named member, and a spring-returned .contact-piece adapted' to be engaged by a moving member the clutch.

9. In combination a pair of rotatable fpart driven by said last-named ,members, a clutch driven by one of such members and movable into and out of engagement with the other, a latch for securing the clutch in engagement with the lastjnamed member, and a trip operated by the said vlast-named member for releasing the' latch.

members, a clutch driven by oneof such members, and movable into and out of engagement with the other, a latch for securing the clutch in engagement with the lastnamed' member, and a trip operated by the last-named member forl releasing the. latch and-moving the clutch.

ERNEST.. C. SMITH.

W. F. MOORE,

SINGLETON.

10. In combination a pair of rotatable or releasing lthe latch and moving l

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