US1899448A - Sawmill - Google Patents

Description

19 E. P; Tu-FTs- 1,899,448

' SAWMILL Filed Sept. 2, 1952 2 Sheets-Sheet 1 Inventor Edward P. TuFTs wwkm Attorneys E. TU FTS 1,899,448

SAWMILL File Sept. 2,1932 2 Sheets-Sheet 2 Feb. 23, 1933.

This invention relates to sawmills an htticill arlyjtoi the. head qblock ;.I'1 1f h3r ii I1f jzgwhiph z th..kneesjgof:theoarri geare ade H .Jo r l th i upp rt n is i e a h 1 w ends lon i dinal rria e an Wh Pr v d d. t i s wv-.: 1- 1-pi1 1 lrw ii h mes wi ra kse te ne i y sec r d oe ece rr a e- 5 ;suit b ep w i a d .mt'sh'etmp eni i I employed. for turninglthe 1 a direci-i o ,jtionuto feed thefifidfl 9 fvvith its kneesn fi for? ievanced after Leach lboa'rd :or 1 slab has, been Limit to positionlthe log-for a Qfres'heut and WhiChxthQ; knees ;,are. mtr'nc;ted) v to place :fthQIIl QiIlnafl position. {Ito have an uncut log qilareed \on thehaJfriageJ-g In ;many, sawmills thegforfivar'di eadvanceu oi the vkneesiofjipos i-i @3510 tioning the log after eich cntisaCGOn PIished Ethrofigh-..t. a :iemanu ally -opei'ated' epa'iwl', fan d lratchet mechanism; ;1 land; thejireturn move- --.'ment ofilthe. knees to their retracted .position" m I g l i Qen -,wfeedsp i He-Whi i ilp Qwll'y eonne'e ed 50 w an"eo emt n llev fi'- 1 iandi is adapt d in 9Qf0P ra Qyitli-;then

- is izccornplished "by means whichi is actuated 'byithefrnovement.oithemcarriagez Qnelof thei obj, ts ofig'my;,ypresient; invene -:.tion; to provided novel, construction -by' ifmohanism ewillplbe'z automatically released ;;whn;theoniechanisinifonretreoting the knees Qisgrendered noperative; thus obviating any possibility athate the? pawls might 1 be in en- .gtg'ement' during {such return; movement."

In ordertorigivefan illnder'standing .;of;the

invention I have illustri'aited fin'the drawings selected. mbQdiment thereof whichpiwill A v 1 adv n he: slide 9 to thedQSir d ex en 1. in c s' top. pe p vom xmeunte 3 r vat 41" and jadapted-toengage a ratehetgor a Y to h Wheel fi nwh ch is f n t e; ha s10- JTheit t j fzt h tl3, aresqm fthe ratehgit;

i ne beid'scribedga'fteri which the novel j fee:

' ;.tliresi. .willo.be pointed Tout T- inIthe appended I leis; ee -perspective lview lvvith gperts ebrokenufoutiiilllistrdti gi'iisavvmill fembody h I H hficoarsrthan.; thefte th ing my invention;

Ff @2'is aifragmentary plan oif the H g r 1 s M ens r p vided.f ritraet gth lpawhreleasingjmechanism which are of usual; constructionfa're sillus-f atrslt'ed in: dottedrlines' iindzthe parts embody a g V v thlss haft QOiS prml 'ded'With n frigtionjwh ln;

-ingg-thiinvnt10n are showminfull liness 1'iThe's2iv vmi11 .compriseswthe usnal frame 1 which iineludes sthe' iraiils" 2?: and 3 011; which ..thex.cerriege- 4 'rides back-andfforthl ,The

frame is. provided with :the extension. .18 -;6v1iichi supports the saw 'arbor. "5: carrying the 7 'saw 6, said saw arbor being driven from a driving pulley 7. The carriage illiasfithefz :usi i: 8 zmountdithereon,which; are-1: adaptedltohe movedtransverselyv offtheoar i riagena Inl the presentg construction :fthese have m m tra r e yvi e e l ieg ends i ratehet Wheel 13.; I

.1 T re s r 1. speci l y;equat d igfi shaft a.n. l t spr vricledz ith 11 lvr nm I Vat i sup r en whi rmin s. neiha v dle, e hand is o itu t with nlc venient reachl ofthe operator hogener eHy t nd ixo' i 'on s deof; th s l 21 adi q i th mm ext ns o 1 1 1 W i h-t s w arb r im llnteiy manipul ng-the, 1e th ope t r can tu n t e af and: hus" w s sl1mi ni' w-millnfeeddevibes; v

esl I ,v ic pshe t carrying: t-i s upp en na pinioni'21' which, meshe with} af 'raclgl22 ou tedvon t e; slide 9- The, low r ,.e d 0 L-Whi h. is d pt o engage. the", si e. ac

24 1f af longitudinalllyeextending member 25.

The member 2 i ymo nted f r movemen -f 1 Ward and, from'the rail 3. saidgn emberjjis 5 51 0 1 31 in'lpos fiiongwherethe fa ce QA is;out e V oi engagement with the frictionwheelfl i hut whe'mthe op atiorf wi hes t ract; he. sli

91 he1 'shiftS-v the,position of; th emb f e ,away from th rai113 to bringt ei r ct n, a M-thereof into, engagement withfth e frictionithe medium of a spring 27. The member. v is moved into its operative position-through. the movement of" a treadle 28 pivotally mounted in bearings 29 which areconnected to the rail 2., This treadle has the downwardly-extending endpportion f 30-.which is connected by a cord 31 to one end of the member 25.. When the tread-1e is depressed a pulling force will be appliedtotheconk connected thereto, which link is provided nection 31 which will move the longitudinally-extending member 25 away from the rail 3and the links 26 serveto maintain the face24 of said member always in parallel relation with the rails. Such movement of the member 25 brings the face 24 into engagement withthe friction wheel 23 as above de scribed with the result that the movement of a the carriage on the rails will serve to shift the slide 9 on thecarriage. v

The present invention provides novel means whereby the shifting of the longitudinally-extending member 25 into its operative position will automatically release the pawls 14 and 19 so as to permitthe free back- -ward rotation ofthe shaft 10. This release of the pawls is secured by a pawl-releasing mechanism which is rendered operative by the member 25 when it moves into its operative position.

-=The carnage 4" has suspendedltherefrom an arm 32 which is pivotallyinounted at 33 34 adapted to be engaged by the longitudi- 1 nally-extending member 25 when the latter and which carries at its lower end a wheel is'moved into its operative position. This arm 32 is connected to a pawl-releasing member '35 WlllCll is mountedon the carriage and "extends transversely thereof. Such pawlbearings 48 mounted on' the carriage4 releasing member is supported on arms 36 a which are pivoted at one endin bearings 37 secured to the carriage'and'which are pivoted at their upper ends to the member 35.

46 indicates a shaft which is journalleg in ne end of said shaft is provided with an offset portion 49 which is-pivotallyconnected to the pawl-releasing member 35 and the other end is provided with an arm 47 which is pivotallyconnected to the upper end of a link 38, the lower end of which thearm32. 1 7

When the longitudinally-extending member-25is moved into operative position into engagement with the friction wheel 23 said is pivotallyconnected to member will engagethe wheel 34 at the lower end of the arm 32 and swing the latter to the left Fig. 3. Suchswinging movement ofthe,

arm- 32 operates through the link 38 to turn the shaft 46 and the turning movement of the shaft operates through the arm 49 to raise the dog-releasing member 35, such member swinging about the arms 36during its rising movement. Such rising movement of the member 35' serves to release the. pawls 14 and 19 by the following mechanism.

with apin or proj ecti0n43 that extends across the upper edge of the quadrant39 so that when said quadrant is turned about its axis the upward swinging movement thereof Wlll operate through the link 42 to raise the "pawll4 out of vengagement with the ratch- Thelower end of the quadrant member 39 hasaalaterally-extending foot 44 secured thereto which normally rests on the pawlreleasing member 35. When said pawl-releasing member is raised as above'described it acts throughnthe foot 44 to swing the quadrant member 39-about its pivot 41 thereby raising the feed pawl 14 out of engagement Withthe ratchet 13 as above described.

Such swinging rmovement of the quadrant member also operates through the finger 45 to raise the stop pawl 1-9 so that both pawls 14 and=19 are disconnected from the'ratchet structure by the swinging movement of the quadrant member 3 9.

the use of the swinging arm 32, the link 38 and dog-releasing member 35, the pawls14 and 19 will be automatically disconnected from the ratchet structure by the movement given to the longitudinally-ex tending member 25by the depression of the treadle 28. r i

The clearance between thermenibers25" and the roll 34 is less than that between said,

c member andthe wheel 23 so that the pawls will be releasedbefore the member 25 is brought into operative engagement with the wheel23. V. i,

i There is herein shownmeans fo'r:releasing the pawls manually. The arm 1 16 is provided with a lateralprojection 53'wh'ich is connected a link 54 to the quadrantmem- 'ber 39 so that an upward swinging move- 0 ment of the arm l6'wil1 operate to raise the quadrant member 39 and thus disconnect the pawlsn J l i I claim: 4

3 1; A sawmill having a carriage provided with transversely-extending racks, rails on whichilsaid 'carriageQt-ravels, a knee-support operativ, said pivoted member having an extension adapted to be engaged by the pawlreleasing member when the latter moves up wardly thereby to give the pivoted member its swinging movementby which the awls are released.

name to this specification.

EDWARD P. TUFTs.

c ln testimonywhereofil havesigned my ly ito release both pawls from the ratchet,

mounted on the carriage and extending transversely thereof, meansto'raise said pawl-releasing member when the slide-re tra'cting means, is rendered operative, and means actuated bythevertical movement of said pawl-releasingmember to swingsaid upwardly thereby to release 7 pivoted member the pawls. a a

2. A sawmill having a carriage-provided with transversely-extending racks, rails" on which. said carriage travels, a knee-support ing slide mounted on the carriage to ;.move

a transversely thereof, a shaft ,journal1ed-. in said slide, pinions on the shaftmeshing with i j 7 said racks, a ratchet on said shaft, 'a manual;

Y a vertically-movable pawl-releasing member 'ly-operated feed pawlco-operatingwiththe f ratchet for rotating the shaft tofadvance the. slide, a stop pawl to prevent retrogrademove5- ment of'the slide, slide-retractingmeans actufated by the movementofthe carriage, a mem ber pivoted to thecarriage and operating when swung upwardly to release both pawls? from the ratchet, a vertically movable pawl-c releasing member mounted onthecarriage and extending transversely thereof,1means to I raise said pawl-releasing member when the slide-retracting means is rendered operative, andconnectionsbetween said pawl-releasing member and said pivoted member which are operative in all positions of theslide and by which the rising movement of thepawl-re- 5 leasing member swings the pivoted member upwardly and thereby releases the pawls.

3.7 A sawmill having acarriageprovided with transversely-extending racks, rails on which said carriage travels,;,a knee-supporting slide mountedgon the carriage to move transversely thereof,fa shaft journallejd in;

said slide,'pinions;on the shaftmeshingiwith V ly-operated feed pawl co-operatingnwith the ratchet for rotating-the shaftto'advance the i said racks, a ratchet on said shaft,a manual- 1 slide, a stop pawl to prevent .--retrogrademovement of the slide, sliderretracting means actuated by the movement. of the'carriage, a

' member pivoted to the: carriage and operat ing when swung upwardly to release both 7 pawls from the,ratc het,"a vertically-movable; r

pawl-releasing member mounted on the carriage and extending transversely thereof,

means to raiseisaid pawl'-releasing,member when the Shde retractmgmeans is rendered

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