US499829A - And fred e - Google Patents

Description

(v'NoModeL-S n 3 Sheetssheet 1. H. F. HAWKBS .8v F. E. HERS'EY.

STAVB SAWING MACHINE;

(N0 Modl.) 3 Sheets-Sheet 2.

H. P. HAWKBS & P. E. HBRSEY. STAVB SAWING MACHINE.

N0. 494%829. Patented June 20, 1893.

mi: nowms PETERS co. vnomurno., wumaon, n4 c.

(No Model.) 3 Sheets-Sheet 3.

H. F. H'AWKES & F. E. HERSEY. STAVB SAWING MACHINE.

No. 499,829. PatntedJune 20, 1893.

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UNITED .STATES HARRISON F. HAWKES, OF SWAMPSOOTT, MASSACHUSETTS, AND FRED HERSEY, OF WOLFBOROUGI-I, NEW HAMPSHIRE.

PATENT OEEICE.

sTAvE-SAWING MACHINE.

SPECIFICATION forming part of Letters Patent No. 499,829, dated June 20, 1893.

Application filed November 9, 1891. Serial No. 411,558- (No model.)

To all whom t may concern:

Be it known that we, HARRISON F. HAWKES, residing at Swampscott, in the county of EsseX and State of Massachusetts, and FRED E. HERSEY, residing at Iolfborougln in the State of New Hampshire, citizens of the United States, have invented certain new and useful Improvements in Stave-Sawing Machines, of which the following is a specification, reference being had therein to the accompanying drawings.

Our invention has for its object to produce an elicient and quick working machine for making staves for barrels and the like, and it consists in mechanism for holding and feeding' the blocks from which the staves are cut, and also in mechanism for. cutting them, all organized into an automatically operating machine as hereinafter described.

We have shown our invention inthe best form now known to us in the accompanying drawings to which reference is made in the following description.

In the drawings, Figure l is a plan view of the machine, one half in section and with the table partly broken away. Fig. 2 is a vertical section on line 2-2 Fig. l, on a smaller scale. Fig. 3 is a front elevation of the mechanism foi-holding and feeding the blocks from which the staves are cut. Fig. 4 is a vertical section on line 4--4 Fig. 3. Fig. 5 is a plan View of the same device. Figs. 6 and 7 are details of the adjustable crank.

The machine is comparatively simple in construction and consists primarily of a cylindrical saw adapted to operate in conjunction with one or more holdingr and feeding devices as will be clear from Fig. l, each of said holding and feeding devices being adapted to present one block of wood to the saw so that at each complete vertical movement of the saw one or more staves are cut.

The base or table of the machine, which may be of any desired form, is shown at a. This base is preferably in plan of the shape shown in Fig. l, which consists of a circular portion for the feeding devices with a substantially square portion at one side for the upright frame which supports the saw mechanism. 'This upright frame is shown at B and is so shaped as to extend upwardly and forwardly so that its upper end is substantially vertically above the center of the circular portion of the table upon which are mounted the feeding devices.

The main shaft of the machine is shown at c Fig. l, and to this shaft a suitable driving pulley is secured. A Worm d is provided -ou the sh aft c which meshes with a gearf on the 'a crank of" shown in detail in Figs. 6 and 7.

The crank pin of crank a@ is pivoted in the lower end of the connecting roda. The movement of the eccentric gear is such that the downward movement of the connecting 'rod n which governs the downward movementof the saw p is comparatively slow, While the upward or return movement of the connecting rod n and saWp is rapid.

It will be clear that the vertical movement of the saw p Will require to be greater when long staves are cut than when short ones are made and it becomes therefore desirable to adj ust the throw of the crank a6. For this purpose the crank is formed as shown in Figs. 6 and 7; that is, it consists of two pieces band c6. The piece 196 is fast to the shaft 7c and is recessed to receive the piece c6. The piece c6 is provided with the crank pin d and the two pieces are secured by bolts el passing through slots e17 so that by loosening the nuts of the bolts the pieces may be slid on each other and secured at any point. In this Way the length of the crank may be varied and its throw governed. The upper end of the connecting rod n is pivoted to a' lever Q Which is pivoted at one end to the link o, which in turn is pivoted to an arm r which projects upwardly from the upright frame B as shown in Fig.,2. The forward end of the lever q is forked and pivotally connected With a vertical rod or plunger s which is free to slide vertically in the bearing t on the end of the upright frame B. The said upright frame B is forked as shown so that the rod or plunger shall have two bear- IOO ings in said upright B and so that between said bearings a belt may be applied to pulley f6 to give the plunger s and saw p, which is secured to the lower endl of the said plunger, a rotary movement in order that the saw may be operated to cut the staves from the blocks.`

The saw 19 is formed of a band of metal in the well-known manner, the upper end of the band being secured to a boss or hub u which is fast on the lower end of the plunger' S, while the lower end of the cylinder or band of metal is provided with saw teeth. The vertical width of the bau d is somewhat greater than the length of a stave, as will be clear. The saw is of sufcient diameter to impart to the staves which are cut the proper cross-sectional curve. The cross-sectional curve of staves varies according as they are to be used for large or small vessels. If they are. to be used in the manufacture of a large tub they will be less concaved and more nearly dat than if they are to be used in the manufacture of a small tub or pail. Vhen it is desired to Vary their curve the saw must be taken out and a saw of proper diameter supplied, the feeding and holding devices being adjusted to suit the change madein the saw.

Itis to be noted here that the number of feeding devices employed may be varied and that when a saw of large diameter is used a greater number of feeding devices may be set around it, as will be obvious.

In order to steady the movements of the saw and strengthen the device the plunger s is continued downwardly through the center of the cylindrical saw by means of a rod c which is screwed into or otherwise secured to the v two arms-b one for each upright.

lower end of -t-he plunger s, and passes at its lower end through an aperture in the block or bearing w on the under side of the table or base A.

In the drawings four feeding devices are shown arranged at equi-distant points on the circular portion of the table. As these devices are all alike in construction one only of them will require to be described. The frame portion of the feeding device consists of two uprights a which are adj ustably secured to the table A and which are more clearly shown in Figs. 3, 4 and 5. Near the base of these uprights and projecting in front of them are These arms are bolted as shown at c to the uprights a by means of bolts which pass through slots d which are formed vertically in the uprights as shown. These slots permit of the vertical adjustment of the arms ZJ' when that is desired. Between the arms fb and journaled therein is the lower feed roll e upon which the lower end of the block from which the staves are cut rests. At one end of the feed roll and fast thereto, is a ratchet f and cofoperating therewith is a pawl g the rear end of the pawl g being provided with a spring h as shown which serves to keep the pawl in contact with the ratchet. v The pawl g is mounted on a linkj' the lower end of which is pivoted on the axle of the feed roll and the upper end of which is pivoted to a horizontal link lc', which in turn is pivoted to the upper end of a bell-crank lever Z. The bell-crank is pivoted to a block bolted to the upright a by means of a bolt Z6 which passes through a vertical slot m in said upright, so that vertical adjustment of the bell-crank and connected parts may be obtained if desired. The end of the horizontal arm of the bell-crank is pivoted by means -of a slot and bolt to a vertical connecting rod n', the lower end of which is provided with a bolt and nut pv by means of which its throw may be varied or adjusted -withl reference to the upward movement of the cross-piece q. The adjusting boltp is set in an off-'set portion r of the vertical rod n as will be clear from Fig. 3. By means of mechanism hereinafter described the crosspiece q is raised at stated intervals and as it.

rises it comes in contact with the lower end of the rod n and operates to raise the rod. When the rod is raised the bell-crank Z is moved on its pivot, and the connecting rod k is thrown forward thus causing the pawl gto move the ratchet fj and consequently the feed roll, thus feeding' the block forward. At the upper end of the upright 01, a similar arrangement of mechanism is provided. The upper feed roll t2 is journaled in arms or projecting pieces h2 which correspond with the pieces b the arms b2 being mounted on the upper end of rods @zand are connected by a rigid cross-piece g3 as shown in Fig. 5. The rods c2 project downwardly through apertures or bearings in which they slide which are formed in the lugs d2 which project from the uprights a. Between the under side of the uppermost lug d2 and a nut e2 which is set on the rod c2 is placed a spiral spring]c2 which tends to press the rods e2 downwardly and thus holds the upper feed roll firmly yet yieldingly against the top of the block which is to be fed forward. The upper feed roll is provided with a ratchet g2 and pawl 72,2, the pawl being mounted in the same manner as is the pawl for the lower feed roll, and being operated by means of a link f2, bell crank k2 and the connecting rod n. The bell-crank 7a2 is pivoted to the upper end of the said connecting rod n', which is slotted for purposes of adjustment. The bell-crank 7.52, is, like the bell crank l', pivoted to a block which may be vertically adjusted in the slot Z2 when IIO staves of different lengths are to be cut. The

length. The feed rolls should be toothed to move certainly and securely feed and hold` the wood.

In front of the feed rolls are placed cross` pieces a3 see Fig. 3, which are toothed as shown. As soon as the last stave which a block of wood will furnish has been cut, and the waste piece passes the feed rolls, it is caught between the toothed cross-pieces as thus preventing the waste piece from falling against the saw or into its path. This Waste piece is then removed by hand, and a new block is inserted by hand between the feedrolls. feed rolls, that is raising the upper feed roll when a new block is to be inserted, a handlever b3 is provided which is fast at its lower end to a cross rod c3 which is journaled at either end in lugs (Z3 sce Fig. 5, which project from a cross-head e3. The cross-head c3 is secured by bolts at either end, which pass through slots in the uprights a and thus permit of the vertical adjustment of the crossl1eade3. On the cross-shaft c3 are secured dogs f3 which bear on the under side of the crosspiece which connects the arms b2 and which is shown at g3, Fig. 4. By taking hold of the lever b3 and pulling it down the cross-piece g3 and upper feed roll and connected parts are raised so that a new block may be inserted. As soon as the block is inserted between the feed rolls, the lever b3 is released and the parts assume their normal position.

For the purpose of raising the cross-piece q', which is raised at regular intervals to operate the feed mechanism as hereinbefore described, the following device is-provided A cross-shaft h3, see Fig. l, which is suitably mounted underneath the table A, is connected by beveled gears js k3 with the secondary shaft g. The cross-shaft h3 is also connected by means of beveled gears Z3 m3 with a shaft n3. The shaft n3 carries two cams p3 Q3 which lie directly underneath the cross-pieces qof the two feed rolls on one side of the machine as will be clear from Fig. l. There is one cross piece q for each of the holding and feeding devices. The shaft n3 is also provided with a gear r3 which meshes with a gear s3 on another shaft t3. The shaft t3 is also provided with two cams us o3 which lie directly under the other ends of the same cross-pieces q. As the shafts n3 153 revolve their cams act in unison to raise the crosspieces q and thus to feedthe two blocks for.- ward on one side of the machine. The cross piece q is provided with downwardly projecting` rigid pins Q5 with which the cams p3 g3, tbc., come directly in contact when the cross-pieces are raised. On the other side of the machine substantially the same arrangement is provided, there being two shafts a4 b4 each provided with proper cams and with gears which mesh. The shaft b4 is geared by means of the gears el d4 directly to the shaft g so that the feed movement in each of the four holding and feeding devices is simultaneous.

The uprights et which serve as frames for the feeding and holding devices are each bolted through slots as shown at a5 to the table A, so that the holding and feeding devices may be adjusted as previously stated toward or from the center of the table, and thus provision is made for cutting staves with differ- For the purpose of `separating theV ent cross-sectional curves, that is for making staves for tubs, pails or other vessels of different sizes.

It will be noted that the adjustment of the feeding devices toward or from the saw does not involve any change or disconnection of the mechanism for operating the feed rolls, since the vertical connecting rod n will be operated so long as' the said connecting rod is over any portion of the cross-piece q', and it will be seen that the said cross-piece q is of such a length as to insure contact With the vrod n whether the feeding devices are located near the saw or farther therefrom.

In the table A directly underneath the saw there is an opening through which the staves as they are cut from the block of wood or bolt may fall. Any well-known device such as an endless belt or an inclined chute may be prov ided underneath the said opening in the table for the purpose of conveying the staves to any given point when they have fallen from the machine.

l. The combination with a cylindrical saw, means whereby the same is rotated, and means whereby it is reciprocated in the line of its axis a distance corresponding with the length of a stave comprising a lever q connected at one end with the shaft of the saw, a rod n, and a rotating crank, of devices whereby a block or bolt is held and presented to the action of the saw, and automatic means whereby the said devices are actuated and the block or bolt is intermittingly fed forward a distance equal to the thickness of a stave and less than the radius of the saw as the staves are successively severed therefrom, substantially as described.

2. The combination with a cylindrical saw, and meansfor rotating the same and for moving it in the line of its axis a distance corresponding with the length of a stave, of a series of feeding devices arranged around the said saw as a center and each comprising devices for holding a block or bolt in position to be'aeted upon by the saw, and automatic means whereby the said devices are actuated for feeding the block or bolt forward intermittingly a distance equal to the thickness of a stave and less than the radius of the saw as the staves are severed therefrom, the said means comprising a single driving shaft and operating connections intermediate the same and all the devices aforesaid, substantially as ward intermittingly a distance equal to the thickness of a stave and less than the radius of the saw, substantially as described.

4t. The combination with a cylindrical saw, and means for rotating the same, of means for reciprocatingr the said saw in the line of its axis with a variable motion, comprising eccentric gearing, means for operating the same, a crank of variable throw operated by the said gearing, and operative connections intermediate the said crank and the shaft of the saw, devices whereby a block or bolt is held and presented to the action of .the saw, and automatic means whereby the said devices are actuated and the block or bolt is fed.

forward intermittingly a vdistance equal to the thickness of a stave and less than the radius of the saw, substantially as described.

5. The combination with the cylindrical saw, of the shaft on which the said sawl is mounted, means for reciprocating the said shaft and saw endwise, means for rotating the salne, and bearings for the said shaft on opposite sides of the saw whereby the shaft is steadied adjacent to both ends thereof, substantally as described.

6. The combination with a cylindrical saw, and means for rotating the same and for reci procating it in the line of the axis thereof a distance corresponding with the length of a stave, of rolls for receiving between them a block or bolt and presenting the said block or bolt to be sawed into staves, and means whereby the said rolls are intermittingly rotated to feed forward the block or bolt a distance equal to the thickness of a stave and less than theradius of the saw as the staves are successively severed therefrom, substantially as described.

7. The combination with the feeding rolls, an endwise movable rod, connections intermediate the said rod and the said rolls whereby the latter may be rotated, and an adjustable carrying frame, of a cross-piece with which thesaid rod (zo-operates in allthe positions of adjustment of lthe adjustable carrying frame, and means for reciprocating the said cross-piece, substantially as described.

8. The combination withthe feed rolls for the block or bolt,a reciprocating rod, operating connections intermediate the said rod and the rolls whereby the latter may be rotated, and means for lifting the rod, of an adjustable stop engaging with the framing to determine the extent of the return movement of the rod, substantially as described.

In testimony whereof we affix our signatures in presence of two witnesses.

HARRISON F. HAwKEs.

FRED E. HERsEY.

Witnesses:

CrIAs. F. PARKER, C. H. I-IERsEY.

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