US1785373A - Hand-operated lumber trimmer - Google Patents

Description

Dec. 16, 1930. c. w. wlLLETTE HAND OPERATED LUMBER TRIMMER Filed April 9, 1928 2 Sheets-Sheet l ATTO 2 sheets-*sheen 2 Dec. 16, 1930. c, w. wlLLETTE HAND OPERATED LUMBER TRIMMER Filed April 9, 192e hanger. This comprises a sleeve 31A, riding shaft 9,' which sleeve has twodownwardly di- Y rected arms 84:' and 34' each provided with a bore 30. The a1-m34( has a'hori'zontal eXtentirety by the numeral 8 is pivoted to. a shaft.

I ed'at one end on rocker arms, Vthemembers L{tl-'f' and 34:', whichwhen rocked 1n one direction'-V v1 passes about the : pulleys 21 and 28;.

31 which in turn has'its ends carried in the' bores 30. .Set screwsl 32 and 33hold Vshaft two frame members 13 and 114 which are in the Vform of arms, provided'with lifnisingsl'?V and 18 respectively. The arms'andfhousings are Vheld together bymeans ofthebolts and 16. The housings haveiinwardlyprojecting` annular - faces 19 and 20 and a pulley 21 is mounted within the sameand between` the hub of which andthe-'annular faces19a`nd20 are disposed frictionlessbearings 22'. Running transversely .of the pulley 21 isfa saw arbor- 23, and a :closurefplate-Mis disposed upon one v`end ofthe arborand collars 25are'disk posed upon'the oppositelydisposed end with a saw .28A disposed therebetween. ,ThepuL ley 21 has a central rib 26 against .which the:

inner endsofthe annular faces are made to engage. A groove-274` 1s disposed upon the ln.

ner face edge of each annular rface,-wh ichl may be drilled/with zanysuitable. material, as

felt-,to maintain `'lubricants Within the fric'- tionless bearings.. The pulley 21 isin alignment with thepulley` 28 disposed upon'the primary .shaft 5,1' and aV Y driving element 29 .Itwillfbe seen that-thes'aw {frameis meant-v *move the pulley 21 toward rpulleyV 28,' yand whenrocked in the oppo'site direction-more move pulley 21 away from4 pulley 28. g "The i c -normal tendency of arms 34and34 is to rock away from pulley 28fand-thereforemove pulley21away 1 also, byreason of,'the'grayitational pull on lever 151.7and `weight-12. 'This f movement islimited'bythebeltf29, which will'. at all times betightened 'suliciently to drive4 thejpulley 21. fThetightness imposed upon.

the driving element 29 isdependent upon' the i position of the yweight 12.Y Thenormal pof'V sition v ofthe saw 26 'disposed 'upen the arbor 2 8, isthat of beingraisedhor elevated and outsof 'contact withr the material .passing thereunder upon the tablegandfwhenitis;` desired to actuate-any one of the cutffoH saws to cutthezmaterial atanys'pecied position,

This is accomplished thefollowingman Y the particular saw to `be actuated?i'slowered.

Each of the heads is depending from -allink motion'orla'zyftong's,

.: of l which isV Vsecurfedtoy thelcross; supporting rod Y 35',` the same being adjustably-.pos'itioned Y l to the bell crank 38 is fastened a connecting bar 40fsecured to the hand operated lever 4l. a

The :hand operated lever 41is positioned upon j a key boardV conveniently located in advance ofA che Vsa; @suspended from the super- 3l-against movement.` V`Frame* 8j consists ot structure of 'the mill, any suitable sup porting element, as a fabricated frame work "f l3. Thefpositionof theloperator is conveniently'locatedtogpermit of an inspection ofthe material passingover the table and the sla-w: head throughthef link 44, the lower end of .whi ch is secured to the savvarbor head andthe upperf endofwhich is secured :to a counterbalanced arm 45.V The; counterb'al anced ,ar1n45 has; a knife edge lbalance "46 resting"uponaffsuitablebearing. 47. The arm carries anfex'ten'sion arm L19providedwith a counterbalance'flS-whichmay beadjustably position'edlt'.elevatel or depress thearm 49; small movementimparted tofthehand manipulating lever '41:1Y is multiplied .in the linkj` motion 34A so thatha small-movement imparted to the hand leveris multiplied i they movement in, raisinsl and :lowering the saw} arbor ,and,headfwith-a minimum oijlex-A penditure of (muscular getfort.

YVhile theorrn of mechanism andldeseribed, admirably adapted to fulfill theobjec't's primarily stated, lit is tobeunderstoodf'thatvit'isnot intendedto conne the .invention tQ;L the oneform ,of embodiment her.ei n` 1 show n and described, rvas itl isfsuscepf A tible of. ,erribodiment in various lforms, allV eomingfwithin the "scope of. the claims whichVv f nu combinatien with a; lumber trimmer,i a saw herein'shown arborfframe 'cemprisingitwocomplementary J prising af-sleeve having addwnwardly and dly'j'directedelbolwf-providedwith a n* paralleli'alignment Awith Ithe sleeve; the sleeve" being pivotallyconnected withy a j ournalbearingblock/'by' a supporting' shaft,

j the 'rearwardly extending armfmember, hav

ing-fawei'ghted elementadjustablyfpositioned Y thereupon beingremovablysecured to elbow oflfthefsupport bracket, the V14forwardly feX- tendingfarm. memberffbeing pivotally con-- nected to the 4support bracketbya secondary shaftextendingithreugh boresof the support bracket-, 'the's forwardly'extending' fbeing. splitand.fhavingfhousings :f with inwardly.

las

projecting annular faces, a pulley positioned within annular faces and round saw arbor 1 maintained in alignment with drivingshaft pulley.

and rearwardV respectively,the rearwardly extending .arm member -movably connected' with a journal bearing block by a supporting y shaft, said journal bearing block removably secured to the structure and means for adjust- .fr l

ing the same en said structure, a Weighted element adjustably positioned on the rear` wardly extending arm member, the forward` ,Y ly extending arm member movably connected Y j With the rearwardly extending arm memberf by a secondary shaft passing throughbores of the support bracket secured to rearwardly extending arm member, adjusting means on support bracket to maintain said secondary shaft parallel to a primary drive shaft, said i forwardly extending arm member i being split i and having housings with inwardly projecting annular faces, a saw arbor, a j

pulley upon said arbor, the hub of `which Y being positionedwithin said annular facesV and the rim of which being positioned exi teriorly thereto, and vfrictionless bearings fdisposedbetween the annular faces andhubs" of said pulley. n Y, y w j '-3. Ina device of thev class described, in combination with a lumber Vtrimmer structureof a saw frame comprising two .lcomplemen-Y l tary arm ymembers extending forward and Y rearward respectively and movably'joined'itof a journal bearing block by a supportingshaft,

the rearwardly extending arm member hav# ing a weighted element adjustably positioned l 7 thereon, the forwardlyA extending arm mem- -l ber being split,having housings with inwardly projecting Vannular faces, a pulley positioned within `said annular faces and around saw arbor substantiallyv as described.

crixRLEs WILLIAM wiLLETrE. I

a device of the class described, inV4 combination with a lumber trimmer structure Y of avsaw arbor frame, comprising tvvocom-` plementary arm-members extending forward A

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