US1447324A - Sawing machine - Google Patents

Description

Mar. 6,1923.

c. F. REICHSTEIN.

SAWING MACHINE.

FILEDMAR.15.1921.

4 SHEETS- SHEET 2.

' WHA/8858 ATTORNEYS 4 SHEETS-SHEET 3.

llllurl C. F. REICHSTEIN.

SAWING MACHINE.

FILED MAR.15, 1921.

Mar. 6,` '1923.

lll-ln lll-Illu! .lllllll-Illlll INH WHA/58858 Fatented Mar.. 6, i923.

UNHTEH STTE PATENT @FFCE CHARLES FRED EEICHSTEIN, OF MEDFORD, OREGON.

SAWING MACHINE.

Application filed Marc-h 15, 1921.

sary to saw the timber into the proper lengths to lit a particular stove. The wood is l renerally sawed in either twelve or sixteen inch lengths, and it is the purpose of my invention to provide a sawing machine which is adjustable to saw the sticks into twelve or sixteen inch lengths although it is to be understood that-the machine can be so designed and adjusted as to cut the sticks into blocks of any requisite stove length. It is also a purpose of my invention to provide a sawing machine which is capable of beinpoperated by a single individual,

and in which novel means is provided for` adjusting' the saws to vary the length of the blocks cut, and to provide means for positively maintaining the sticks against turningr or twisting during` the interval in which they are in engagement with the saws so that the proper and accurate cutting of the blocks is insured.

I will describe one forni of sawing niachine embodying' my invention and will then point out the novel features thereof in claims.

In the accompanying drawings:

Figure l is a view showing in side elevation one form of sawingF machine embodying my invention.

Figure 2 is a top plan view of Figure l partly broken away.

Figure 3 is a top plan view of the table comprised in the machine with portions thereof broken away. u e

F igure ilA is a vertical sectional view of the machine shown in Figure 2.

Fig-ure 5 is a vertical sectional view taken on the line 5-5 of Figure Figure 6 is a vertical sectional view through one of the adjustable rotary saws shown in the preceding` views.

Serial N0. 452,413.

Figure 7 is a vertical sectional view taken on the line 7-7 of Figure 6.

Similar reference characters refer to similar parts in each of the several views.

Referring specifically to the drawings and particularly to F igure l, my invention in its present embodiment is shown as positioned on a truck which permits of the ready removal of the machine from place to place to facilitate the cutting of the cords. The truck is designated generally at T and includes a bed l5 from which extend uprights 16 for supportinga table designated generally at i in inclined position thereon. As illustrated to advantage in F igure 3, the table comprises loi'lgitudinally extending beams 17 connected by transverse beams 18. Supported upon the beams li' and 18 are hingedly disposed partitions 19 arranged to provide a longitudinally extending` slot in which endless conveyors designated at C are adapted to work. The conveyors C comprise in the present instance endless chains 2O trained about sprockets .21 fixed to shafts 22 journaled in the outer ends of relatively short beams 23 secured to the beams 1S. The chains Q() carry triangular shaped projections 24 at regular spaced intervals throughout their length, such projections serving as followers for effecting the movement of the sticks of wood over the table.

As shown in Figure 3, shafts Q5 and 26 are journaled in suitable bearings supported upon the beams 17, such shafts being arranged transversely of the table and having one of their ends provided with pulleys 27 and 27, respectively, to which power is adapted to be applied as will be hereinafter described. The shaft Q6 has keyed thereto at a point intermediate its ends a rotary saw S, while the shaft 25 carries two rotary saws S and S2 which are keyed to the shafts in the manner shown in Figures 6 and 7 to permit of the rotation of the saws with the shaft or to allow of a longitudinal movement of the saws on the shaft in order that they may occupy various spaced positions with relation to each other. As shown in Figures 6 and T, the saw S or S2 is secured on a hub 2S by means of threaded collars Q9. The hub 2S is slotted longitudinally on its inn-er side to receive a key 30, and the adjacent portion of the shaft 25 is likewise slotted to receive suoli key, it being noted that the key is of suiiicieut length to permit of the necessary longitudinal movement olf the hub 2S thereon while at the same time locking the hub and consequently the saw to the shaft 'for rotation therewith.

As shown in Figure 3, the sa s are arranged to project troni the upper side ot the table ll between the conveyor belts C with the saws S and spaced apart and the saw S arranged in the rear oil. these saws and on z. line between the saws. The relative position ot the saws tu" and ffl adapt-ed to be varied 'for the cuttingv ol bl clvs ot' different lengths by means o'i" yokes 'K and li which are slotted to accommodate the saws S and S2 and vwhich embrace the hubs Q8 and collar 29 so that when moved laterally a correspoiuling` more ment ot the saws upon the shaft is ettected shown in Figure 5, the yoltes K and li are mounted Ltor lateral sliding' movement in slots 3l termed in two et the adjacent cross beams i8, the opposite ends of the volies being provided with suitable tongues 32 which slidably lit within these slots. Lateral movement ot the yolres is etfected through the medium ot the bar 33 which is connected to the yokes by toggle links 3i, such linls being' arranged in pairs with ther links o't each pair pivoted to the bar Aat a common point at one end and to the voles K and K at a corresponding point at the other end. The toggle links 35e oil Vach pair occupy divergent positions with .respect to each other so that by moving the bar 33 longitiulinally a spreadii'ig or coutracting oi the links is ei'ected according;- as the bar is moved in one direction or the other and thereby elli'ecting the movement olf the yoles K and K" toward or a ay 'from each other. Movement o'l the bar 33 is et'- lected by means ot a lever 35 vfulcrumed uponV thestable at the point indi :ated at BG and pivotally connected at -one end of the bar 323 at a point indicated at 3T. The. free end oit the lever 35 projects 'trom the side ot' the table so that it can be readily manipulated by the operator. is adapted to be engaged by a latch 38 lor maintainingr the lever in that posit-ion wherein the yokes l( and K occupy their greatest spaced position. The yokes are normally urged toward each other by means ot' coiled contractile springs till connected to the'confrontingr sides olf the yokes in the manner shown in Figures il and Referring;` now to Figures l, 2 and 4l, l have here shown means for maintaining` the sticks of wood in imniiovable engagement with the followers 2li during the interval in which the sticks are engaged by the rotary saws S, S and 55:. rlhis means in the present instance comprises a pair of channeled members M and M which, as shown in Figure 2, are positioned above the tableT and between the saws S, Si and S2 so that cer- This end o'lf the lever they are beingv sawed.

tain ot the conveyor belts C are 'tree to more within the channels of the member The upper ends oi the members M and vM are pivotally and slidably connected to a cross bar 4 0 mounted in standards 4l and extends transverselyof the table at a point adjacent its upper end. This connection is etl'ected through. the medium oi' arms 42 provided with T-heads which are pivotaliy mountcd in ears ist secured to the upper ends ot the members M and lvl. The arms #i2 are slidably lit-ted within couplings which latn ter serve to connect the several sections of which thc cross bar -gtO is composed. These couplings 45 are mounted for movement upon the cross har l0, and beingn siidably associated with, the arms .it will be clear that the members M and M are capable ot longitudinal sliding' movement upon the table. ly virtue of the pivotal connection between `the arms i2 and the members, the latter are capable o't.' vertical swinging' movement. but are locked against lateral swinging moven'ient so that they occupy the same position with respect to the saws and conveyor belts at all times and thus permit the proper operation ofthe latter, The lower ends oi the members M and irl." are beveled as indicated at 46 in Figure l, and these beveled ends carry hingedly supported bearings sti in which shafts Li8 are jouri'ialed. rthe opposite ends of the shafts i8 carry rollers 49 that are adapted to be projected into the path ot u'iovement ot vthe sticks oil wood so as to ruido the sticks into engage.

ment with the beveled ends ot the members and ultimately beneath the n'iembers where they are maintained during' the interval in which the severalsaws engage the sticks. Owing to the manner et supporting the members M and M it will be clear that the weight of such members is free to'act upon the sticks oil wood as they are successively (ilelivered to the saws, and under such action the sticks are maintained in immovable en- `gageinent with the conveyor belts so that it is impossible for them to twist or turn while For the purpose ot preventing lat-eral movement ot the lower ends oi' the members M and M. l provide a plate 5t) hineedlyA in inclined position with its lower edge .provided with extensions y 0" which are interposed between each pair o'r rollers 49 so as to engage the rollers `when the inenibers lll and ivi" tend to move laterally and thus to lock the men'ibers against such movement.

CIK

This arrangement in conjunction with the. means -tor supporting the upper ends ot the members insures that the members will at all times occupy a predetermined position transversely oil the table and to thereby permit of the proper operation ot the saws and conveyor bolts.

Any suitable means may be provided tor continuously driving the conveyor belts and rotary saws, .l having in `the present instance provided an internal combustion engine li mounted on the bed 15 ol. the truck. rl"hc engine is adapted to be operatively connected to the saws by means ot a pulley l keyed to the. engine shaft 53 and about which is 'trained a belt This belt 5ft is also trained about the pulleys 27 and 2T so as to etlectrotation of the saws S, S and S2 in the direction ot' the arrows in Figure l. Between the pulley l. and the pulleys QT and 27, the belt 54 is engaged by a tension ing device which in the present instance comprises a` pulley journaled on the upper end of an arm 56 hingedly supported at the point indicated at. 5T. A. cable 5S is connected to the arm 5G and trained about a shaft 5S) which is adapted to be operated by a crank 60 tor moving the arm so as to cause the pulley to tighten or loosen the belt 54: and to thereby operatively connect or disconnect the pulley P to or from the pulleys 2T and 2T". The shaft 59 can be locked so as to maintain the pulley 55 in operative position by means ot a ratchet wheel 61 which is engaged by a spring pressed pawl 62. The several conveyor belts C are adapted to be continuously rotated so that their upper stretches move upwardly oit the inclined table by inea-ns of a pulley 63 fixed to one end ot the upper shalt 2Q. The pulley 63 is operatively connected to the engine shaft lby means ot a belt G-lf. which is twisted intermediate its looped ends so as to elect rotation of the pulley 63 in the direction ot' the arrow in Figure l. The belt Gat. is also engaged by a tensioning device which comprises a grooved pulley 65 pivotally supported upon an arm 6G which is engaged by a` spring 67 for normally maintaining the pulley in tensioning position with respect to the belt so as to operatively connect the shaft to the shatt 53. This: tensioning device can be actuated by the operator while standing at the lower end oi the table by'means ot' a flexible cable 68 which is trained over a pulley G9 supported on one edge of the table. The upper end ot t-he cable is connected to the arm GG while its lower end is adapted to he disposed at the lower end oli the table within easy reach ot the opera-tor. Staples TO are arranged at intervals along` the edge of the table and through which the cable GS is adapted to be trained so as to properly support the cableA for operation.

The operation of the sawing machine is as follows: ll'lith the engine .ll operating and the pulleys and G5 in tensioning position. the upper stretches ot the conveyor belts move upwardly ot' the table, while the several saws are rotated so that their projecting portions move in a direction opposite to the direction ot movement ot the conveyor belts. li a stick ol wood is now placed upon the lower end ot the table and transversely ot the conveyor belts. it will be engaged by the followers 2-l. and thus carried ul'i-wardly ot the table in the direction oi the saws where it first engages-the several rollers elf) and is thus guided into engagement with the bev cled ends atti o't' the members M a nd M. The beveled edges serve to elevate the members M and M as the stick of wood passes beneath such members. and by virtue ot the weight oil the members and the frictional contact between the wood and the members. the stick of wood is immovably held in enx gagement with the conveyor belts so that when the saws S and S2 engage the stick ot wood it will not twist or turn wheret'or the saws will etlfect a clean cutting ot the wood. By virtue ot the arrangement ot the saws S' and S2, it will 'be clear that the stick oll wood is cut at two ('lilt'ereut points within its length so as to divide the stick into three blocks. These blocks under the action ot the conveyor belts are carried upwardly ot' the table where the saw S engages the center block and thus cuts the same into two small blocks. This center block is also ininiovably held against twist-ing or turningbecause ot the tact that the members lvl and M are still in engagement with the wood. and remain in contact therewith until all ot the blocks have passed out ot engagement with the saws. rl`he several blocks are ultimately deposited from the upper end ot the table into any suitable receptacle arranged therebeneath. Should the sticks ot wood tend to jam between the members lll and M and the table or conveyor plate, it willbe clear that by virtue of the mounting of the members they are tree to move upy"al'iflly ot thc table thus releasing the wood and permitting ot' the proper operation ot the conveyor belts. Because ot the inclination of the members M and M they will return to normal position after all the blocks have passed trom beneath the same so as to be in opera-tive position ior succeeding blocks introduced on the conveyor belts at the lower end ot the cable.

As previously stated, this sawing machine is primarily designed tor the cutting ot sticks ot tire wood which are usually tour teet in length. These sticks are generally cut in blocks ot twelve or sixteen inches in length. lilith the saws S and S2 in the position shown in Figure 2. they are iulaptcd to coact with the saw S to cut the sticks ol Wood into four tivclve inch blocks. Then it is desired to divi( e a strip ot Wood into three sixteen inch blocks, the saws S and S2 are moved outwardhY from each other by a manipulation ot' the lever 35 in the manner previously described, and with the saws in this expanded position it ivill be clear that when a stick ot wood is placed so as to lbe engaged by the sans Si and S or l2 and S, it will be cut into three blocks oit equal length, it being understood that during this operation the saw S or Si remains idle.

From the foregoingoperation taken in conjunction `with the accompanying drawings.y it will be manifest that l have provided a sawing n'iachine which is operable to cnt sticks ol ivood into various lengths by an adjustment ot certain oi the sa-ivs, and that such adjustment can be effected Without the necessity ot disassociating am7 partot' the machine and While the machine is in operation. Furthermore, the machine includes positive means for maintaining' the sticks ot' Wood in operative relation to the savvs and against turning' ot' twistingl so that the proper cutting otfthe wood by the sans is insured.

Although I have herein shown and described only one torni of sawing` machine nfl/insee embodying my invention, it is to be under stood that various changes and modifications may be made herein Without departing from the spirit ot the invention and the spirit and scope otl the appended claims.

that I claim is:

l. A sawingv machine comprising, a table, conveyor belts movable over the table, a shaft journaled on the table, rotar7 sans mounted tor longitudinal movement on said shaft but rotatable therewith, yolies mounted -lor sliding movement on the table and embracingy said sans, a bar between the sans, links connected to said 'vokes and har, springs connecting said yoles for normallyv 'urging the yokes toivard each other, and a lever connected to said bar for manually actuating` the same.

2. ln a sawing;- machine, a pair oit rotary saws mounted for lateral movement with respect to each other, `volzes embracing the saivs also mounted tor sliding movement, toggles connected 'to the yoles, springs connecting' the vokes tor normally urging the same toward each other, and manuall)1 operable means tor simultaneously actuating the toggles against the action. oit said springs.

CHARLES FRED REICHSTEIN.

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