USRE458E - Improved saw-mill for resawi - Google Patents

Description

NITED STATES PATENT OFFICE.

lMPROVED SAW-'MILL FOR RESAWIl G BOARDS AND OTHER LU'ilBER.

Specification forming part of Letters Patent No. 2,321.

lli, ich) Extended Ortobcr H0, 18 5;

lo @E whom, it' may concern/L 13e it known that l, PEAnsoN CROSBY, of Fredonia, in the State of New York, have in vented certain new and useful Improvements in Sawliiills for Rcs-anfing Boards and other Lumber; "and l do hereby declare that the following isla full, clear, and exact description thereof, rei'erence being had to the accompanying drawings, making, part oi' this specilicat-iqnLin which- Figure l is a perspective view ot' the machine;.'l`|`i`g. 2, a vertical section of the apparatus for gaging, controlling, presenting, and feeding theboards; and Fig. 3, a vertical section of a modification thereof.

The other figures, representing some of the details, will be referred to hereinafter; but in all v'the lignres the same letters indicate like parts,

ln resawing lumber, and particularly in resawing,r thin boards, it is of the utmost importance that the boar-d be presented and moved to the cutting action in the plane of the saw, vfor if there be any deviation from this the sawing becomes imperfect, the saw is strained and bent, andthe line of out is liable to bev carried ont of the required track, so that ncither of the boards producedA will be of an equa-i thickness. It is well known that much of the lumber Alzrronght to market, which rcquircs to be res'awed, sometimes into Very thin boards, yis more or lcss warped or bent in the direction .of the length or breadth, or both, and hencea .saw-mill to be practically adaptcd to this purpose must be capable ot' resawingsuch as 'wellas straight lumber. In the .welhknown versiering saw-mills this can be done, because the piece to be resawed is previously placedalong its entire length against the vertical face of a carriage parallel with thc' plane of the saw, and secured to such face, so that it can be lirmly held and prevented from bending, and, if desired, the warps and bends can be forced out in securing it to the face of 'the carriage; but this modeofprocedure is attended with great labor and consumption ot' l"time, and for any other purpose than that of cutting Veneers from very costly lumber is in every respect too expensive.

Now, the object of my said invention is to rcsaw boards as they are found inthe market iaied November 2%, 18.41; Ress'ile NoA 130,dated March l; eissne No. 45S. dated April 2S, i857.

hv a selfadapting: or automatic mechanism bperating in such a manner that one of the 'noards produced by each resawing will be of a' uniform or equal thickness from end to end, however the original board may be bent 'or lrifarped or vary in thickness from end to end,

or boards in succession, however they may vary from each other in thickness; and to this end y my said invention consists in combining with the saw of any `suitable, kind and operating in any suitable manner a mechanism fol` gaging one face of the board to be sawed and guiding it in a plane parallel with the plane of the saw, and a seltadapting mechanism for making pressure on the opposite face of the board to hold that face of the Aboard which is to be gaged in Contact with the gaging and guiding mechanism as it is advanced to the guiding and the said self-adapting mechanism being such as to force and hold the gagged face of the board against the face ol the gage, and. to force or bend out the warps o1" bends of the gaging and guiding mechanism consisting of two parallel rollers or an equivalent therefor, and the said self-adapting mechanism consisting of two yielding pressure rollers or an equivalent therefor, under the said combination And my said invention also consists in connecting the gaging and the self-adapting pressthe first part of my invention is applied by means of rollers, with the mechanism for'imparting motion .to them bymeans of universal joints, that the axis ofthe gagingsrollers may be maintained in a plane parallel with the plane of the saw at1 whatever 4distance'from the plane of the saw they maysbeplaced, and

the gage-rollers or other gage may adapt them-- vselves to the face of the boards, however the boards 'may vary `in thickness one from anedge.

And z'ny inventlon also consists 1n the method of straining the saw by means of two stirrnpsback edge and the other toward the front edgeand to produce a like result on,any number cutting-edge of thcsaw, the said gagging and plank when they are `warped or bent, the said nre-rollers, or either, when the principle of that the rollers which force the board againstA other, or from end to end or from edge to v one secured to the end ofthe saw toward the. y i

' upper and lower girts of the and these two stirru ps in turn being connect-` ed by a play-joint with a th'ird or straining stirrnp connected with the saw frame or gate.

The frame represented in the accompanying drawings is adapted to the purpose, hut may lie-varied at pleasure. The saw-frame ismnoh lighter and narrower than the ordinary one.. l. strain thesaw hy the following contrivanoe: Instead of the common stirrup, 'll use bolts, las at Figs. 1 ando, which pass through the gate, and are secured and strained hy nuts. One end of the bolt is fastened and passes through a stirrnp, l, Fig. 6, which rests on a pin passing; through said bolt, as at' r. lhe stirrnp'is susceptible of a vibration as well as a lateral movement. At each end of this stirrup is anotherstirru p, in form of an inverted V, as at d resting on pins ee. These stirrups also may v move laterallyhy means oll oblong holes, as at. a, Fig. l'. slit, so as to yreceive tlul end u, Fie'. T.

The

lower ends of the stirrups rl l are also open y or split, so as to receive the saw ol` which i is a section. .'lhel holes inthe saw and in the stirrups ld are to receive pins or rivets. Il v means of' theohlong holes, as n, lfig. T. the saw n\ay have an equal strain, and hy a lat'- eral shift ot' stirrup v1'; on the piu f' the strain may he thrown on the front ot' tlnl saw and gire the saw more or less rake. a holt', as n., Fig. ti, passing thrl'iuu'h the ernt'er oi' each grirt, not only the saw is kept in place, hut the grato is kept in proper trim or hal-ance, and not allowed to twist or warp. and thisconstrnction requires much less weight' otl met-al or material. l

4ln addition tothe straining apparatus already described for stitfening the saw. ll use the following.;r apparatus, similar to that described in Letters lalent granted to me .lune 7, lls.

ln order to he ahle to use a very thin saw, l make use of the following contrivanee for kccpil'ig the saw true and preventing its running aside: lmtwecn the two center posts ot' the frame, and atsuitahle height, is placed the stock lil, Fig. l, containing' the rollers 2 2, between which the saw mores.

purpose of keepingtlul hoard t'rom rising, and

, opposite to this and hack ol' the saw is another (Not isilrle iu the drawings.)- 4 V --l isa piece extending up from the stock, passA like` roller.

ing through a mort isc or opening in the frameA piece 5 5 willi the rack (i. ln the framdpiece 5 5 is a pinion helow t5, hy` which the rack is raised orplowered to rcgnlal'tthe height ol` the Stock and rollers. 0n the right, in the picec HL 4, is a series of holes, 't'- -t to receive a pin .to retain or hold np the piece /twith thestoek ahdvrollers. instead ot' a series of holes and a pin, a ratchet and hand may he used for this purpose. -,l`hc ratchetniay he on the shaft of' the pinion which raises thc rack. 'lhc cross part 7 7 is a horizontal extension ot' It 4, sliding against the upright l'ein'leuposts, to

rate and 'lhe ends of stirrnp 'h are open orl llily means otI ily regulat ing-screwslhose ure kept in place. groowal roller, 3, in front ol' the saw is used for the :ist

| keep the piece 4.- t and stock and rollers steady, There is also another stationary stock and rollers below the platform b b, for the same purpose of regulating or steadying the saw. 'lherollers are ont of view in Fig. 1, but reptorni b b. l

To hohl the hoard or plank to be saWed, I use the following` apparatus: On the platform b l, Fig. '1, is a eross-slidc platform or oar- .tn'st platform h v. means otpa setserew, as at d, Fig. 1. On this platform c cenare arranged the vertical rest or gage rollers ce, Figs. 1 and 2. Figs. l and 2 is a metal frame to support the rollers, which in thesetigures are represented as being` on one shaft having the projecting hearings g gg, Fig. 2. and the lower bearings are in the platform 'c c, Figs. 1 and 2. There is '.xnothcfl ol' rollers at i' yi i', Figs. 1 and 2.

fing' with the first set, cc. ly the horizontal pieces l.' l.- the sets are connected, and they l form bearingsandsupportstorthern. Through i tho pieces I. passes a shaft, l, which also passes through thelever m. which lever m has t for its fulcruui the shal't'n u, and this shaft u n is supported at the top hy the frame o o. an arrangementof holes or hearingspp the position ol' the shaft n n may he shifted to su it di I'lerent thicknesses ottimtier. The shaft is placed in the pieeesvordcvers lr 7., so as to como snliieienlly between the twoscts of rollers i v to have a partial effect ol' the lever 'nion the near rollers, or those which introduce the hoards. 'lhe lower part of the shaft ofthe rollers passes down through a slot, p, in the slide en. (Ser 4f". Fig. 2.) The board,'an end viewol' which is represented hy the dots lf. infine' placed between therrollers, then hy means of the level-1u, which possesses Snitahle elasticity, and the winch-drum, cord, and ralehrt and hand, as at s s, Fig. '1., the rollers connv flied with theI lever press. the hoard against the rollers e c, and thus gripthe hoard. lhe shaft of the rest or gage rollers o c passes through the hand rl, Fie'. i.

lhe lateral movement of the carriage c fr., hy means of the set-screw d, Fig, tl, is for the purpose of regulating the thickness to he eut, as the rollers in the frame ff are hy this means thrown nearer to or farther from the plane ot' the saw. The rollers on each side of the'hoard turn in toward each other to advance the hoard toward the saw, and the rollers on-caeh side nearest the saw vhave the shafts extended down to the drivingwhcelsfl, Figs. l and 2; and 1r u u, Figs. 1 and L, isa framework which supports and holds the parallel posts V yV of thevshafts, whichretain the same relative position to each other.

\ hors il and VK. AS the rollers e e and i li, to accommodate different thicknesses of stuff, require either to approach to or recede fromeach other. it is requisite to use universal resented in the sectional Fig. l of the plat;-

riage, r c, whiclrvis moved laterally on the.

lhese last alsocousist' ot' two sets correspond platfrnm rf e, as seen at the right Thisframework Iu yu is supported hy the tim-4 joints in the daides, as at; 1* q q q', Fig. 2,

,Iiig. 5 is a side view of the said feeding-ratchet ling-rod rests on the horizontal piece or lever Vhand g/ on any part of the lever on a portion ,represented in this tignrc by means of univer- \t`i0n other suitable :.irrangcnients may be subst'tl'ited at the pleasure of the constructor.

., duced between two sets of rollers, c c and 'i i, with one edge resting on the platform l of the ltwo sets oi' rollers by drawing:r llie lever in,

y nre-rollers.

N2-Fig. 2, being the Ai'ccdinglratchet on the seme 'shaft with the ruiter-wheel Z and XV.

with the pawl. y is the feeding-rod which moves the ratchet. The' lower end ofthis feed 1. Thislcverhasa'groovc (represented bythe dots) `r`-hieh the tongued base of the feedingrod rests. is a cord attached to the rod. and alsot-o the end of a spring, 3, which maybe of Wood or metal, ci' suitable length to give the requisite motion. 4 a cord attached to the feeding rod or hand, which passt-s around a pulley, and extends np to a istening, G, convenient to the tender. li", Fig. l, is the' fastening. 7, Fig. 5, is aeord attached tothe feedinghand near the top, u'hich extends downward to a horizontal spring, The position and arrangement of parts represented by 2. 3, 4, 5, and ti are'to place and retain the ofthe frame of the mill. i0 is a roller in the end of lever l, on which plays the eccentric driver 11. The circle l2 represents the driv` ing-pulley 12 of Fig. 1. 13, liig, 5, is the shaft of the eccentric driver Il, pulley l2, and fiy 14, driven by wheel 15 and belt 1G of Pig.

17 17, Fig. 1, is thc connectings'od between the crank-pin on the fly-wheel and the gate.v

l losaw diagonally the feeding-rollers at the right, as'a a a, Fig. 3, are put in the position sal joints between the rollers, raade'and mounted as represented at 'l 2 in the sectional Fig. 4; i; b Zr, Fig, 3, are pieces of stuff tobe sawcd. confined by the feediiig-rollers. The dotted lines represent the line ot' the cut of the saw.

Instead ot'threcroliers, one above the other, more or less may he substituted.

From the ii'ircgoing' it n'iilbc soon that the saw-gate is operated by crank motion in the usual manner, and that the saw,uhich should be thin for-tl|e purpose ofresawngboards, is

,rangement makes part of, my present inveir fho board to be resawed or slitted is intro.-

franie, and its suri'acegripped between the which causes the rollers to operate as press Vhen thus grippeihthc board iscarried forward or fed to the edge olthe saw by means of the rotatiin,r motion given to the rollers, thus constituting them at the saine time feed-reliers; and while the board is acted upon by the saw it is prevented from beingsr lifted up by passing under the rollers 3 3, the posit-ion of which is regulated to suit different widths oi." boards by the sliding and adjustable fraine'workin which they are hung4 As the gagging and gniding-appara-tns is placedncar tothe cntting-edce of the saw.

andthe self-adapting pressure apparatus el`' fects the gripping,r of the board againstthe gaging apparatus and across the entire breadth of the board, and with a force suiiieient to bend ont. the wai-ps or bends, and lo hold the board lfirmly during thc cutting aetionof the sau', it follows thatlhowever the board may be vwarped or bent itavill be presented to the cuttingV action ofthe saw in astraight plane parallel with the pl ane.ot'tl1e saw, although after passing: the sau' the two parts into which it is divided 'will resume thc warps or bends of t-he 'orginal board, sotha't in constructingsue'h a machine care must he taken not to place the gagging, guiding, and pressing apparatus at too great a distance from thc cuttingedge of the saw; and whatever modification may be lnade in the mechanism for gagingand guidiupr thc board, and for making pressure to hold it against the gage or guide, they must, in combination, perform the function of bend ing ont the warps or bends of the boards if they he bent or warped in the direction-of the length or breadth, or both, and keeping them straight alongv that portion oftheir length for the time being which extends to the cuttingcdge ot' the saw, and the pressing apparatus must extend across the entire breadth of the boards, and in making pressure must be selfadapting to the varying thick ness ofthe boards, not only in the direction ot' the length, but also in the direction of the breadtln'that its gaged face may be maintained in the required plane, whether its upper edge be of the same or ofgrcater or less thickness than its lower edge;- and if the machine be intendedfor s'llt' ting boards to diti'erent thicknesses, the gaging apparatus must be capable of ready adjustment toward or from the plane of the saw; but as an erpiivalent therefor the saw-frame, or that which controls the saw, may be made to shift toward or from the gage, although I prefer tlnl shifting of the gagging apparatus.

' And although 'I have aboveA described the gagging;- and pressure apparatus as performing also the operation' ot' feeding or advancing the hoard to the saw, it will be obvious that the feeding operation may be performed by other means, in which ease thc gag-ing and directing function may be performed by a tiat gageor other equivz'ilent means, provided it presents a surface of sufficient extent against Awhich to press that face of the board which is to be gaged, that t-he Wai-ps or bends may be forced out if the board be warped or bent;

and so with the apparatus for making pressnre against the opposite face ofthe board. A\lthou,;^h rollers for this purpose are, in my .j udg-nien t,the l est,nevcrtheless, ifother means be employed -for feeding or advancingthe board, non-rotating bars may be employed, providcdthey he so arranged as to make the required pressure on the face of the board, and they be made selfu adapting 4to the varying; thickness of the board, as before described; and although two rpllers or bars are required for making pressure, when the gagslitting boards.

ing apparatus consists of tuo rollers a single roller or bar may be substituted as an inferior equivalent when a plate is substituted t'or two .rollers as n, means imagingr and guiding, as it will be Obvious that si single pair ot rollers-one for gaging' andthe other V[or making pressure-canuot bend out the u'arps or bendsv of the board nor guide it in the piane of the saw, nor cana single roller 'for making pressure ans ver the purpose incombination with two gagerollers i'or gag-int;- :iml guiding, for it' placed opposite to one ot' the ,fa'nie-rollers they wili simply act as a single pair, and ill placed opposite the space between the in'o gage-rollers thereI will be no resistingsurfaee opposite the line of pressure, and in consequence, it the pressure applied be suiiicient to bend ont the warps of' the st'it'test part 0l" a plank, which a necessary condition, it will bend the weak parisino much, and hence. fail to present. the board in atruc plane to the aetion ot' the saw.

And although T prefer the Inode herein described ol' hanging and straining the saw,- as it enables' me to use a thinner saw than by the uscof auyaothcr known means, nevertheless I (lo not wish to be understood as limiting mysell'totheI use ol' all the parts of my invention in conneuliolnas thtl mode ol" gaining, guiding, and presentingihe board may be advantageously employed in connection` with any other molle ol' straining the saw, or, in fact, with any. kind el' uiillsaw suitable t0 What I claim as'my invention, and desire to seeure by Letters Patent', is

l. rlhe Inode ot' operation, substantially as herein described, cfg-aging, guiding, and presenting,Y boards to the action of a saw, which inode of operation results from combining with a. diiingsaw the mechanism, substan tia'llj as lescribed, for gaging and guiding one 'l'aec ot' the boards, and the mechanism for making: n self-adjusting pressure, Substaulially as described, on the opposite t'aee of the bfmrds, so that the boards will be clamped between the two said mechanisms on opposite 'ln'es'aud immediately in front ot' the cut-tingedge ot' thesawso as to prescntvthe gaged face of thc boards, however warped or bent they may be, in aI plane parallel with the plane ol' tl1esaw,` as set forth.

2. ln combination with :L slittinf.;` saw and f

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