US1058897A - Resawing-machine. - Google Patents

Description

G. M. PELTON.

BESAWING MACHINE.

APPLICATION FILED JULY 26, 1909.

Patented Apr. 15, 1913.

4 SHEETS-SHEET Z.

Inventor. WOW

Witnesses; W WW fl ttorne'ys.

COLUMBIA PLANOURAPH JO-,WASHXNOTON. D. c.

. PELTON.

RESAWING MACHINE. APPLICATION FILED JULY 26, 1909.

Patented Apr. 15, 1913.

4 SHEETS-SHEETS.

Invert/t0 r,

Witnesses M Palm uittorneya.

COLUMBIA PLANOGRAPH CO..\VASHINOTON, D. c.

UNITED STATES PATENT OFFICE.

GEORGE M. PELTON, OF MILWAUKEE, WISCONSIN, ASSIGNOR TO THE FILER AND STOWELL COMPANY, OF MILWAUKEE, WISCONSIN, A CORPORATION OF WIS- CONSIN.

RESAWING-MACHINE.

1' b ail whom it may concern:

Be it known that I, GEORGE M. PnL'roN, a' citizen of the United States, residing at Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented certain new and useful Improvements in Resawing- Machines, of which the following is a specification, reference being had to the accompanying drawing, forming a part thereof.

The main objects of this invention are to recut lumber to smaller dimensions with as little waste as possible; to facilitate setting the feed rolls for cutting different dimensions; and generally toimprove the construction and operation of machines of this class.

It consists in the construction, arrangement and combination of parts as hereinafter particularly described and defined in the claims.

In the accompanying drawing like characters designate the same parts in the several figures.

Figure 1 is a front elevation of a resawing machine embodying the invention; Fig. 2 is a horizontal section on the line 2 2, Fig. 1, and a plan view of the lower part of the machine; Fig. 3 is an enlarged vertical cross section of the feed mechanism on the line 8 3, Figs. 2 and 4:; Fig. 4 is a vertical longitudinal section on the line L 4:, Figs. 2 and 3; and Fig. 5 is a detail view of one of the pawl and ratchet locking devices for setting and holding the feed rollers in different positions.

Referring to Figs. 1 and 2, a designates a band saw mounted on band wheels 6 and c in the usual or any suitable manner, the upper wheel being mounted in adjustable and yielding bearings for properly adjusting and guiding the saw and subjecting it to the requisite tension. Upon the base d of the main frame are mounted transversely and horizontally movable roller supports 6,

on opposite sides of and adjacent to the plane of the descending or working side of the saw. These supports are connected with the frame and guided in a rectilinear direction by parallel motion linkage consisting as shown in Figs. 8 and 4, of connected links f pivoted at their upper ends to said'supports and at their lower ends to vertically movable slides g guided in brackets or stands 75 mounted on the base (Z, and of links i pivoted at their lower ends to the links f Specification of Letters Patent.

Application filed July 26,

between their pivot connections with the supports 6 and slides g and at their upper ends with upwardly projecting ears on the brackets or stands h. The supports 6, which have approximately triangular shaped bases, are each carried and guided at or adjacent to their angles by three such parallel motion linkages.

Vertical feed rollers are journaled in the supports a on each side of and parallel with the saw plane. In the present case three pairs of rollers are shown, but the number may be varied. The upper bearings of the feed rollers are preferably formed in or inonnted on detachable plates 70, which are bolted to the upper ends of the supports 6. -Below the supports 6 and parallel with the direction of their movement, a transverse driving shaft Z is mounted in suitable bearings on the main frame. It is driven at a variable speed from the lower band wheel shaft by the following mechanism, as shown in Figs. 1. and 2:

m is a counter shaft parallel with the shaft Z and connected therewith by a pinion n and gear 0. A friction wheel 29 is feathered and movable endwise on the shaft m by means of a rock q and a pinion 1" mounted on a shaft .9 which is provided with a hand wheel 25. The friction wheel 27 engages with the face of a friction disk u fixed on the end of a shaft 0 at right angles to the shaft on and parallel with the lower band wheel shaft with which it is connected by a belt and pulleys w and 00. The friction disk u is held in yielding engagement with the wheel 39 by a thrust bearing y on the front end of the shaft '0, a lever e and a threaded {rod 2 provided with a spring 3 and an adjusting nut 4: for varying the pressure of the lever 2 against the bearing 9, and hence of the friction disk at against the periphery of the wheel 79.

By turning the hand wheel 6, the driven wheel 9 is adjusted toward and from the center of the disk 11. and the speed of the feed roller driving shaft Z is correspondingly varied.

rollers j are fixed spur gears 5, the gears of the rollers on each side of the saw plane being connected by idle gears 6, by which the rollers of each set are caused to turn in the same direction as indicated by arrows on Fig. 2.

To the upper ends of the shafts of the In each support 6 outside of and parallel with the axis of the middle roller, is journaled a shaft 7, which is provided at its lower end with a bevel gear 8 and at its upper end with a spur gear 9 meshing with the gear 5 of the adjacent roller j.

On the under side of the bases of the supports 6 are journaled in horizontal alinement with each other, bevel gears 10 in mesh with the gears 8. The gears 10 are formed or provided with elongated hubs or sleeves having flanges or collars at their inner ends and held in bearings formed therefor in the bases of the supports 0, as shown in Fig. 3. These bearings are preferably extended to form housings for the gears 8 and 10, and the lower parts 11 thereof are made detachable and bolted to the upper parts as shown, for assembling the gears. The gears 10 are splined or feathered and movable endwise on the drivin shaft Z.

For adjusting the feed rollers j to cut lumber of different dimensions, the following mechanism is provided: Racks 12 and 13 are attached to the supports 6 on the under side thereof in different horizontal planes parallel with the shaft Z. As shown in Figs. 1, 3 and 4, a shaft 14, parallel with the band wheel shafts, is provided with a pinion 15, meshing with the rack 13, and a tubular shaft or sleeve 16 mounted and movable endwise on the shaft 14, is provided with a wide faced pinion 17, meshing with the rack 12. On these shafts 14 and 16, at or near their front ends, are fixed pawl carriers 18, made in the present case in the form of wheels, and between these pawl carriers hand wheels 19 are revolubly mounted on their hubs. On the opposite sides of and next to the pawl carries 18, ratchet or looking wheels 20 are arranged concentric withthe shafts 14 and 16. The inner ratchet wheel 20 is fixed on the ad- .jacent' bearing in which the shaft 16 turns,

while the outer ratchet wheel 20 is loosely mounted on the extended end of the shaft 14, being held thereon by a cap or washer 21 bolted to said shaft. This outer ratchet wheel which determines the adjustment of the outer set of feed rollers j, is provided as shown in Figs. 1 and. 2, with a weighted arm 22, which normally rests on a part of the frame oZ serving as a stop therefor. Each of the pawl carriers 18 is provided as shown in Figs. 4 and 5, with a pair of pivoted pawls 23, which are normally held by an interposed spring 24 in engagement with the toothed rim of the adjacent ratchet wheel 20. Each hand wheel 19 is provided with a pin 25 which projects therefrom through an elongated opening in the associated pawl carrier between the pawls 23, which are normally held against it by the spring 24. One of the hand wheels is provided with a pin or projection 26 adapted to enter a corresponding socket or opening in the other hand wheel and thus lock them together when the tubular shaft or sleeve 16 is shifted forward so as to carry the rear set of pawls 23 out of engagement with the rear or fixed ratchet wheel 20. The shaft or sleeve 16 is shifted endwise by a forked lever 27 fulcrumed on a part of the frame and engaging with a grooved collar on said shaft or sleeve, as shown in Fig. 4.

The lumber is supported as it is fed between the rollers j and after it passes the saw, by horizontal live rollers 28, which may be connected and driven one from the other by a belt passing around pulleys 29 on their extended shafts, as shown in Fig. 2. These rollers may be driven from any convenient part of the machine by a belt and pulley or other connection, which is not shown.

In the operation of the machine the inner set of vertical feed rollers 7' is adjusted and set to cut lumber to the desired thickness or dimension by means of the inner or rear hand wheel 19 which turns the tubular shaft or sleeve 16 and operates through the pinion 17 and rack 12 to adjust the inner support 0 toward and from the saw plane. The parts of the roller shifting and adjusting mechanism being in the positions in which they are shown in Figs. 4 and 5, the initial movement of either hand wheel 19 operates through its pin 25 to disengage the advance pawl 23 from the associated ratchet wheel 20, thus permitting the pawl carrier 18 to be turned with the hand wheel by engagement of said pin with the front end of the slot or opening in the pawl carrier, the other or rear pawl yielding against the spring 24 and riding over the teeth of the ratchet wheel. hen the feed rollers are thus brought to the desired position as indicated by an index or pointer on the graduated rim of the pawl carrier, the hand wheel being released, the spring 24 throws the adwince pawl back into engagement with the ratchet wheel, thereby locking and holding the pawl carrier and the rollers with which it is connected, in the desired position and moving the pin 25 slightly backward to its central or neutral position in the slot or opening of the pawl carrier, as shown in Fig. 5.

The inner set of rollers is ri 'idlv locked and held in place by the engagement of the rear pair of pawls with the rear or fixed ratchet wheel 20, but allowance is made for variation in the thickness of lumber being resawed in the adjustment of the outer set of feed rollers j, which is approximately adjusted so as to certainly and effectively engage with the outer face of a piece of timber or lumber to be cut, and is permitted to yield away from the saw plane by lifting the counter-weighted arm 22 of the outer ratchet wheel 20 with which the shifting mechanism of the outer set of rollers is locked by the front or outer pair of pawls 23. It is sometimes necessary or desirable to shift or adjust both sets of feed rollers simultaneously toward or from the saw plane. To accomplish this, the lever 27 is thrown backward thereby shifting the tubular shaft or sleeve 16 forward and carrying the rear pair of pawls 23 out of engagement with the rear or fixed ratchet wheel 20 and the pin or projection 26 on one hand wheel into the socket or opening in the other hand wheel. The two hand wheels are thus locked together and operate as one, with the shafts 14 and 16 under the control of the front J-air of pawls 23 and the yielding ratchet wheel 20. When the hand wheels are thus locked together, if they are turned to the right, both sets of rollers j will be simultaneously moved toward the saw plane, while if they are turned to the left the rollers will be simultaneously moved away from the saw plane. hen both sets of rollers are locked to the front ratchet wheel 20 they are permitted to yield away from the saw plane, such movement of the rollers tending to turn the hand wheels and the ratchet wheel to which they are locked to the left, thereby lifting the weighted arm 22 away from the stop on which it normally rests.

Various changes in the details of construction and arrangement of parts of the machine may be made without affecting its principle and mode of operation and without departing from the spirit and scope of the invention.

I claim: 1. In a resawing machlne the combination with a saw of roller supports mounted upon parallel motion linkage and movable horizontally toward and from the saw plane, vertical feed rollers mounted on said supports parallel with the saw plane, means for adjusting said supports and rollers toward and from the saw plane, and means for rotating said rollers in different positions.

2. In a resawing machine the combination with a saw and frame, of roller supports movable horizontally toward and from the saw plane, parallel motion linkage connecting said supports with the frame and consisting of links pivoted to the supports and to slides guided vertically in the frame and of links pivoted to the frame and to the first mentioned links, vertical feed rollers mounted on said supports parallel with the saw plane, means for adjusting said sup orts and rollers toward and from the saw p ane, and means for rotating said rollers.

8. In a re-sawing machine the combination with a saw, of roller supports movable transversely toward and from the saw plane, feed rollers mounted on said supports parallel with the saw plane, shifting mechanism for adjusting said supports toward and from the saw plane, comprising hand wheels connected with said supports, locking wheels parallel with the hand wheels for setting and holding said hand wheels in different positions, one of said locking wheels being fixed and the other yieldingly held in its normal position, means for locking the said hand wheels to said locking wheels, and means for detachably engaging said handwheels with each other independent of the means of engaging one of them with the yieldingly holding means.

I. In a re-sawing machine, the combination with a saw, of feed rollers parallel'with and movable toward and from. the saw plane, shifting mechanism for positively adjusting said rollers toward and from the saw plane, either independently or simultaneously in opposite directions, means yieldingly operating on said shifting mechanism, and devices for connecting the yieldingly operating means to the shifting mechanism, permitting disconnection of the yieldingly operating means from the shifting mechanism while leaving the shifting mechanism operative for adjusting the feed rollers in opposite directions, unaffected by or independently of the yieldingly operating means.

5. In a resawing machine the combination with a saw, of roller supports movable transversely toward and from the saw plane, feed rollers mounted on said supports parallel with the saw plane and provided in different horizontal planes with transverse racks, coaxial shafts provided with pinions, one meshing on the upper side with one rack, and the other meshing on the lower side with the other rack, ratchet wheels arranged concentric with said shafts, one being fixed and the other provided with a weighted arm for yieldingly holding it in a certain position, pawl carriers fixed on said shafts and provided with pawls normally engaging with said ratchet wheels, hand wheels mounted on said shafts next to said pawl carriers and adapted by their initial movement in either direction to release the associated pawls from the ratchet wheels engaged thereby and then to turn said shafts for shifting the roller supports, and means for rotating said rollers.

6. In a resawing machine the combination with a saw, of roller supports movable transversely toward and from the plane of the saw, feed rollers mounted on said supports parallel with the plane of the saw and provided in different horizontal planes with transverse racks, coaxial shafts provided with pinions meshing one on the upper side wit-h one rack and the other on the under side with the other rack, one of said shafts being tubular and movable endwise upon the other, ratchet wheels arranged concentric with said shafts, one being fixed and the other yieldingly held in a certain position, pawl carriers fixed on said shafts adjacent to said ratchet wheels and provided with pawls engaging therewith, hand wheels rotatably mounted on said shafts between and adjacent tosaid pawl carriers and adapted by their initial movement in either direction to release the pawls from the ratchet wheels, and by their further movement to turn said shafts, means for locking one hand wheel to the other when they are brought together .by the endwise movement of said tubular shaft, and means for rotating said rollers.

7. In a resawing machine the combination with a saw, of roller supports movable transversely toward and from the saw plane, feed rollers mounted on said supports parallel with the saw plane and provided in different horizontal planes with transverse racks, coaxial shafts provided with pinions meshing one on the upper side with one rack and the other on the lower side with the other rack, one of said shafts being tubular and mounted on the'other, ratchet wheels arranged concentric with-said shaft-s, one being fixed and the other yieldingly held against a stop, pawl carriers fixed on said shafts between and adjacent to said ratchet wheels and each provided with .a pair of pivoted pawls, springs interposed between the pawls and tending to hold them in engagement with the teeth of the ratchet wheels, and hand wheels loosely mounted on said shafts between and adjacent to said pawl carriers and having pins passing loosely through openings in the pawl carriers between the pawls, each hand wheel being adapted by its initial movement in either direction to disengage the advancing pawl from the associated ratchetwheel and then to turn the pawl carrier with the shaft on which it is fixed.

8. In a resawing machine the combination with a saw, of roller supports movable transversely toward and from the saw plane, feed rollers mounted on said supports parallel with the saw plane and provided with transverse racks, shafts provided with pinions meshing with said racks, one of said shafts being tubular and movable endwise on the other, a lever for shifting said movable shaft endwise, ratchet wheels arranged concentric with said shafts, one being fixed and the other yieldingly held against a stop, pawl carriers fixed on said shafts between and adjacent to said ratchet wheels and each provided with a pair of pawls, springs tending to hold said pawls in engagement with the teeth of the ratchet wheels and hand wheels loosely mounted on said shafts between and adjacent to the pawl carriers and provided with pins passing loosely through openings in the pawl carriers between the associated pawls, each hand wheel being adapted by its initial movement to disengage the advancing pawl from its ratchet wheel and then to turn the pawl carrier with the shaft on which it is fixed, one of the hand wheels having a projection for locking it to the other when they are broiight together and one set of ;pawls is carried out of engagement with the associated ratchet wheel by the endwise movement of said tubular shaft.

In witness whereof I. hereto afiix my signature in presence of two witnesses.

GEORGE M. PELTON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G.

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