US715054A - Sawing-machine attachment. - Google Patents

Description

No. 715,054. Patanted 1m. 2. 1902.

J. N. GRAHAM. SAWINE MACHINE ATTACHMENT.

(Applica. n filed Aug. 12, 1901.)

n on LA Patented on. 2. m2.

J. H. GRAHAM. SAWING MACHINE A TACHMEN-T.

(Application fllsd 12. i 1.

Z Z INVEZTOR.

ATTORNEY:

UNlTED STATES JOHN N. GRAHAM, OF

PATENT OFFICE.

FRANKLIN, INDIANA.

SAWlNG-MACHINE ATTACHMENT.

{SPECIFICATION forming part of Letters Patent No. 715,054, dated December 2, 1902.

Application filed August 12, 1901. Serial No. 71,763. (No model.)

To all whom it may concern.-

Be it known that 1, JOHN N. GRAHAM, of Franklin, county of Johnson, and State of Indiana, have invented a certain new and useful Sawing-Machine Attachment; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying draw ings, in which like numerals refer to like parts.

The object of this invention is to provide an attachment to a sawmill or a sawing-machine for automatically returning a board that is being sawed into pieces or strips to the operator near the saw, and thus dispense with the services of the man who would otherwise be needed to return the board after each strip or piece has been sawed oil from it.

The nature of this invention will be understood from the accompanying drawings and the following description and claims.

In the drawings, Figure 1 is a perspective of the machine. Fig. 2 is an elevation of the right-hand end. Fig. 3 is a horizontal section through a part of the machine on the line A A of Fig. 1. Fig. 4 is an elevationof the left portion of the left end of the machine. Fig. 5 is a crosssection of a portion of the machine on the line B B of Fig. 1, parts being broken away. Fig. 6 is a plan of a portion of the top'of the machine, showing the guide for separating the sawed strips from the board being sawed up. Fig. 7 is a bottom view of a portion of the table at the left end, showing the means for separating and holding the guiding-beam, parts being broken away. Fig. 8 is a cross-section of a portion of the table in line with theslot through which the guide is adjustable, the table being partly broken away. Fig. 9 is a part of a modified form showing in perspective the right-hand end of the conveyor and the means thereon for preventing the board from being entirely discharged by the conveyor.

In detail, 1 represents the table of a sawmill or sawing-machine, 2 being a circular saw. There is nothing peculiar about this part of the machine, and its description will not be fully given, as the attachment may be made to any kind of sawing-machine.

In connection with the table of the machine I provide a slatted conveyor the top of which is movable toward the table, said conveyor extending beyond the left end of said table. As here shown, the conveyor consists of two sprocket-chains 4, with cross-slats 5 placed close together and secured to links of the chain. The chains run on the sprocketwheels 6 and 7, carried on the shaft 8, that is mounted in the posts 9 and 10 and driven by the pulley 12, secured to said shaft. This is the mounting for the right-hand end of the conveyor. The mounting of the left-hand end is substantially the same, there being a pair of sprocket-wheels upon a shaft mounted in the horizontal boards 13 and 14. The board 13 is secured to the inner faces of the posts 15, 16, and 9. The board 14 is fastened to the inner face of the post 17 at the lefthand end and at the right-hand end is supported by the shaft 8, as appears in Fig. 2.

A cross-board 18 connects the two boards 13 and 14 to brace the legs 15 and 17. The conveyor is driven With the top moving toward the saw, and consequently toward the operator, who stands at the right-hand end of the conveyor.

The operator places a board on the table 1 in position for the saw 2 to out a lath or small strip therefrom. The lath or strip passes behind the saw and beyond the guide 20, while the main part of the board remains on the near side of the saw and guide 20. As the sawing continues the end of the board projects beyond the left end of the table 1 until it rests upon the rollers 21 and 22. As soon as one board is sawed and has been pushed to the left of the saw another board is immodiately fed to the saw, and the forward end of the second board pushes the first board farther to the left until the rear end of the board drops off the left end of the table 1, as shown in Fig. 1, by the boar-i123. As soon as the end of the board 23 drops down upon the conveyor, the conveyor draws the board to the right, and off the roller 21. Then that board lies flat on the conveyor and is carried end wise to the operator at the right-hand end of the conveyor, who takes it up and again feeds it to the saw until the board has been entirely sawed up as may bedesired. While sawing one board it may be fed through the The object of the rollers 21 and 22 is to diminish the friction with the board 23, whereby its rear end will be readily carried off the rear support by the frictional engagement between the conveyer and the front end of the board after the board has assumed the position shown in Fig. 1. Said rollers also promote the readiness of the movement of the board from the saw by reducing the friction of the board against its support.

The posts 15 and 16 are short and do not extend above the conveyer. In fact, the board 13 extends above said posts and the board 26 is secured to the side of board 13, so as to leave a space or guideway between the rear ends for holding and adjusting the posts 27 and 28, which carry the rollers 21 and 22. The posts 27 and 28 are merely boards narrow enough to fit loosely in the guideway between the boards 13 and 26, so that they will have movement longitudinal of said guideway. Across the upper end of the boards 27 and 28 there is a cross outside board 29, then a cross inside board 30. The board 29 is secured stationary to the post 2'7 and 28, as they are shown in Fig. 3; but the board 30 is independent of them and is supported by the screw-bolts 31, said board being locked into position by the end nuts 32. The rollers have hearings in the board 30, and said board can be adjusted by loosening the bolts 31 and driving a wedge between the boards 29 and 30 until the board 30 is pushed inward far enough, and then the nuts 32 are tightened.

The rollers 21 and 22 are mounted on shafts 33, which, as stated, have bearings at their outer ends in the board 30 and at their inner ends extend through a slot in the beam 35 and hearings in the board 36. The adjustment of the board 30, which was above described, is necessitated when the beam 35 is adjusted laterally, as and for the purpose hereinafter explained. The board 36 is clamped tightly against the beam 35 by bolt 37, which has the head 38 on one end hearing against the board 36 and at the other end is screw-threaded and extends through the board 29 and carries the nut 39 for clamping. By this means the rollers 21 and 22 and the means for carrying their outer ends is held in place with relation to the beam 35. To prevent the clamping-rod 37 from clamping the ends of the rollers 21 and 22 against the adjacent parts so they will not turn, I place The separating-boards 40 between the beam 35 and board 30, the ends of the boards 40 being set in recesses in the board 30.

The beam 35 is provided with a longitudinal slot 41, into which the narrowed ends of said boards 40 extend loosely, said boards being, however, thicker than the width of the slot, thus providing shoulders on the boards 40, (not shown,) that bear against the face of the beam 35. The shafts 33 of the rollers extend loosely through the slot 41, and when the boards 40, just described, are loosened by the nuts 39 the whole stand, which carries the rollers 21and 22, may be pushed along toward or from the saw to suit various lengths of boards that may be worked upon. If the boards are short, these rollers must be placed much nearer the end of the table 1 than as shown in Fig. 1. When the rollers are in the proper place, their supporting structure is tightened stationary by the nut 39.

In order to make the machine complete, it is necessary also to make the beam 35 adj ustable somewhat toward and away from the conveyer. To accomplish this result, said beam is mounted at its end next to the table 1 upon a metal lip or support 43, that is secured by bolts to the under side of the table 1 and which extends to the left somewhat from the table enough to furnish a ledge upon which the beam 35 may rest, as shown in Figs. 5 and 7. This metal support 43 has a lengthwise slot 68, as appears in Fig. 7, and through it the bolt 69 extends for securing the beam. The outer end of the beam is carried upon the bracket 46, extending rearward and secured to the posts 17. It is similarly slotted longitudinally, and through it the bolt 47 extends for securing the beam 35 in place where adjusted, as appears in Fig. 4. Said beam 35 carries the guide- strips 20 and 50. The guide-strip 20 is a piece of metal very narrow and about two inches high. It is secured to the beam 35 by the bolt 51. The end of the guide-strip next to the saw extends on the table 1 and is held and adjusted by the bolt in the groove or recess 48, that permits its lateral movement.

The guide-strip 50 is pivoted at 52 in a suitable recess 53 in the beam 35, so that the boards passing from the guide-strip 20 will not engage the end of the guide-strip 50. To help deflect the board, an enlargement 54 is made thereon, so that the ends of the moving boards will not engage the end of the strip 50. The strip 50, while pivoted at 52 at one end, is laterally adjustable at the other end and held in place by a pin 55, that may be placed in any one of the series of'holes 56 in the beam 35. By the strip 50 the small strip of lumber cut ofi from the main board is deflected out of the way to the rear.

In order to throw the board 23 forward as.

it falls off the table land place it properly upon the conveyer, I employ a deflectingboard 60, that is hinged at 61 along its upper edge to the bottom of the beam 35. The deflector is preferably formed of sheet metal, as shown in Fig. 5, and preferably of two strips overlapping each other and clamped by the bolts 62, and they are vertically adjustable by slots 63, through which the bolts 62 extend. The deflecting-board 60 is held in proper inclination by the curved slotted bar 64, secured to said board 60'at one end and clamped to the arm 65 by the bolt 66 through the slotted bar 64. Said arm 65 is secured to and extends down from the bottom of the beam 35.

11 is the stationary post behind what has just been described and supports the table 1.

Another guiding or deflecting board 70 is provided under the table 1. It is hinged to the under side of the table 1 and is not only vertically inclined, but also is longitudinally inclined toward the conveyer as it approaches the right-hand end of the conveyer. The other end of it is placed to the rear of the board 60, so that it will not interfere with the movement of the sawed board as it is moved forward along on the oonveyer. This deflecting-board 70 is formed of two parts adjustable like the board 60, the means for vertical adjustment not appearing in the drawings. Means are also provided for preventing the board from being discharged by the conveyer upon the floor. As shown in Fig. 9, but not elsewhere, a bar or board 80 is placed crosswise at the forward end of the conveyerframe, being secured to the post 9 and the end of the board 14. It is beyond and does not interfere with the movement of the conveyer, and the top of the board is on a lower level than the top of the conveyer. Consequently the board 23 while being moved bythe conveyer does not engage the board 80 until it has been moved over the end of the conveyer so far as to tip. I provide back from the end of the conveyer an arm 81 to engage the rear end of the board when it tips and hold the forward end of the board off the floor. The board 23 is then in a convenient position for the operator to pick it up. The arm 81 is a rectangular bar secured to the inner face of the board 14. It is not needed particularly when the table 1 is as wide as that shown in Fig. 1, for the end of the board 23 would tip against the bottom of the table unless the table 1 were too high. When the table 1 is too high above the conveyer or when it does not extend out far enough over the conveyer, the arm 81 is used.

The roller 22 is a little larger in diameter, and therefore its upper surface is a little higher than the roller 21. The object of this construction is to cause the board to be tipped by the higher roller about the time the board leaves the end of the table. In such movement the board is pushed forward by another board being sawed immediately after it, and when the forward end of the forward board strikes the second roller 22, which is higher than the first one, it helps to separate the rear end of said board from the forward end of the following board and to assist in tipping it.

What I claim as my invention, and desire to secure by Letters Patent, is-

1. The combination with a sawing-machine having a suitable table, of a support on substantially the same level as the table to receive the forward end of the board as it moves from the table, said support being spaced from the table and behind the saw to permit the rear end of the board to drop between it and the table, and a horizontal conveyer below the space between the table and said support movable toward the table to receive the rear end of the board as it drops from the table.

2. The combination with a sawing-machine having a suitable table, of a support to receive the forward end of the board as it moves from the table, means for mounting said support whereby it is adjustable toward orfrom the end of the table, and a conveyor on a lower level than the table movable toward the table and adapted to receive the rear end of the boards as they drop from the table.

3. The combination with a sawing-machine having a suitable table, of a supportto receive the forward end of the board as it moves from the table, guideways in which said support is mounted whereby it may be moved toward or away from the end of the table, means for clamping the support in any desired position, and a conveyer beneath the table and said support movable toward the table.

4. The combination with a sawing-machine having a suitable table, of a roller mounted some distance from and in line with said table to receive the forward end of the board as it passes from the table, and a conveyer on a lower level than the table movable toward the table and adapted to receive the rear end of the board as it drops from the table.

5. The combination with a sawing-machine having a suitable table, of a roller mounted some distance from and in line with said table to receive the forward end of the board as it passes from the table, means for mounting said roller whereby it is movable and adjustable toward and from the table and a conveyer on a lower level than the table movable toward the table and adapted to receive the rear end of the board as it drops from the table.

6. The combination with a sawing-machine having a suitable table, of a pair of rollers mounted some distance from and in line with said table to receive the forward end of the 1 board as it passes from the table, one of said rollers being farther from the table and higher than the other roller, and a conveyer on a lower level than the table movable toward the table and adapted to receive the rear end of the board as it drops from the table.

7. The combination with a sawing-machine having a suitable table, of a pair of rollers mounted some distance from and in line with said table to receive the forward end of the board as it passes from the table, one of said ceive the rear end of the board as it drops from the table.

8. The combination with a sawing-machine having a suitable table, of a conveyer on a lower level than the table movable toward the table and adapted to receive the boards from the table, a vertically-inclined board along the side of said conveyer for deflecting the boards as they come from the table upon said conveyer, means for hinging said deflectingboard at its edge, means for altering the angle of the inclination of the deflecting-board and holding it in its altered position, and means for adjusting the width of the deflectingboard.

9. The combination with a sawing-machine having a suitable table, of a conveyer on a lower level than the table movable toward the table and adapted to receive the boards from the table, a stationary beam or extension beyond and in line with the end of the table and to one side of the conveyer a vertically-inclined deflecting-board hinged at its upper edge to said beam or extension, means for adjusting the inclination of said deflectingboard, and another deflecting-board secured beneath the table inclined vertically and also longitudinally toward the discharge end of the conveyer.

10. The combination withasawing-machine having a suitable table, of a conveyer on a lower level than the table movable toward the table and adapted to receive the boards as they pass from the table, and a stationary horizontal bar at the discharge end of the conveyer on a lower level than the top of the conveyer upon which the board may tip.

11. The combination with asawing-machine having a suitable table, of a conveyor on a lower level than the table movable toward the table and adapted to receive'the boards as they pass from the table, a stationary horizontal bar at the discharge end of the conveyer upon which the board may tip, and means for engaging the upper end of the board when it tips on said bar.

In witness whereof I have hereunto affixed my signature in the presence of the witnesses herein named.

JOHN N. GRAHAM.

Witnesses;

O. A. COVERT, G. W. NEAL.

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