US 632640 A
Description (OCR text may contain errors)
.Nu. 632,640. Patented Sept. 5, I899.
I 8. W. BUTTERFIELD.
LOG SAWING MACHINE.
Application filed May 11, 1899.) -No Model.) 3 Sheets-Sheet l,
B y 5 @W I A 770/?NE rs No. 632,640. Patented Sept. 5, I899.
S. W. BUTTERFIELD. LOG SAWING MACHINE.
(Application filed May 11, 1899.)
3 Sheets-Sheet 2,
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No. 632,640. Pa tented Sept. 5, I899.
s. w. BUTTERFIELD.
LOG SAWING MACHINE.
v (Application filed May 11, 1899.) (No Model.) a Sheets-Sheet 3,
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UNITED STATES PATENT OFFICE.
SAMUEL \V. BUTTERFIELD, OF THREE RIVERS, CANADA.
sPEcI'FI'cATIoN forming part of Letters Patent No. 632,640, dated September 5,1899.
Application filed May 11,1899. Serial No. 716,421. (No model.)
To all whom, it nuty concern:
Be it known that I, SAMUEL W. BUTTER- FIELD, of Three Rivers, in the Province of Quebec and Dominion of Canada, have invented a new and Improved Log-Sawing Machine, of which the following is a full, clear, and exact description.
The invention relates more particularly to machines for sawing logs transversely into blocks to be ground into pulp for papeumaking; and the object of the invention is to provide a new and improved log-sawing machine which is simple and durable in construction, completely under thecontrol of the operator, and arranged to bring the saw and the log quickly in proper position for sawing off a block in a very short time and to remove automatically the sawed-off block from the machine.
The invention consists of novel features and parts and combinations of the same, as will be fully described hereinafter and then pointed out in the claims.
A practical embodiment of my invention is represented in the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views.
Figure l is a sectional side elevation of the improvement on the line 1 l in Fig. 2. Fig. 2 is a sectional front elevation of the same on the line 2 2 in Fig. 1. Fig. 3 is a sectional plan view of part of the improvement on the line 3 3 in Fig. l, and Fig. 4: is a sectional plan view of the several driving-gears.
The log A to be sawed transversely into small blocks of a suitable length is mounted on a log-feeding device formed by spiked rollers B B, receiving an intermittent rotary motion to intermittently feed the log at the will of the operator until the forward end of the log abuts against a stop 0, made in the shape of a transverse slide extending in the path of the log. A circular saw D is normally in a depressed position, as indicated in full lines in Fig. 1, until the log has been fed forward against the said stop G, and then the circular saw D is caused to move upward to saw the log transversely a distance from the stop'and out off a block of wood from the end of the log of a desired length, according to the distance between the saw and the said stop. As soon as the block is cutoff from the log the stop 0 is automatically withdrawn and then a kicker E engages the cut-off block at one side and forces it off a table A at one side of the machine.
The saw D has its arbor D journaled in suitable bearings on a lever F, preferably formed by two beams fulcrumed at F on a suitable framework G, supporting a platform G for the operator to stand on and which platform also supports said table A and the bearings for the carriage-rollers B. The fulcrum F of the lever F is located somewhat in advance of the main drivingshaft 11, journaled in suitable bearings on the framework G and provided with a pulley l-l, connected by belt with other machinery to impart a rotary motion to said shaft H. The latter is provided with a pulley H over which passes a belt H also passing over a pulley H secured on the arbor D, carrying the saw D, so that when the shaft His rotated a continuous rotary motion is given to the arbor and its saw D by the connection above described. The lever F receives a swinging motion, and for this purpose is connected by pitmen I with crankdisks 1, secured on a shaft 1 journaled in suitable bearings on the frame G and adapted to be driven by a friction-gear under the control of the operator standing on the platform G. For this purpose the shaft 1 is provided with a friction-pulley 1 adapted to be engaged by a friction-pinion 1 secured on a shaft 1 journaled at one end in a bearing on a lever J and loosely at its other end in a bearing held on a fixed beam J, forming part of the frame G. The shaft 1 is provided with a pulley 1 over which passes a belt 1 also passing over a pulley 1 secured on the shaft H, so that when the latter is rotated a rotary motion is transmitted to the shaft 1 and the friction-pinion I. The lever J is connected at its upper free end by a link J 2 with a lever J extending above the platform G, to be under control of the operator, so that when the latter moves the said lever in the direction of the arrow 0. then a forward swinging motion is given to the lever J to bring the friction-pinion I infrictional contact with the friction-pulley I to rotate the latter. The motion given to the friction- IOO pulley 1 and its shaft 1- causes the crankdisks 1 and pitmen I to impart a swinging motion to the saw-carrying lever F and move the saw upward in engagement with the log to cut off the block, as described, and to return the saw to a lowermost position. By pivoting the levers F somewhat in advance of the shaft H, which furnishes the driving power for the saw, I provide a tightening de- Vice for the belt H when the lever F swings upward and the saw is doing heavy workthat is, cutting a log. WVhen the lever F swings back to its normal lowermost position, the belt H is again slackened. The stop 0 receives its motion from the up-anddown motion of the leverF, and for this purpose said stop is pivotally connected with one arm of a bell-crank lever O, fulcrumed on an overhead framework G and the other arm of said bell-crank lever is pivotally con nected by a link 0 with the lever F. When the lever F swings upward, the linkC imparts a swinging motion to the stop from the lever C, so as to gradually withdraw the stop 0 from the end of the log A, and the stop 0 moves completely out of engagement with the end of the log at the time the saw D has completely out through the log. lVhen the lever F swings downward, the stop 0 is moved in an opposite directionthat is, forward hack to its former position into the path of the log to cause the log to abut against the stop when fed forward, as hereinafter more fully explained.
The kicker E is in the form of a lever pivoted at its upper end on the overhead framework G and the said lever is provided with a rod F. and a spring E coiled on said rod and pressing with one end against the kicker and at the other end against an upright of the overhead framework G and which upright also forms a guideway for the free or rear end of the rod E. The kicker E is normally locked in a vertical position against the tension of the spring E by a lockingcatch N, having a notch engaging a fixed keeper N on the operating-beam of the overhead framework G The free end of the catch N is adapted to be engaged by a vertically-disposed rod N fitted to slide in suitable bearings N carried on the upright of the overhead framework, and the lower end of said rod is adapted to be engaged by a lug or projection N carried by the lever F. A foot N is adapted to rest on one of the bearings N to limit the downward sliding motion of the rod N and hold the upper end there of in contact with the catch N. When the leverF swings upward, as described, and the saw has cut through the log and the stop 0 has been withdrawn then the projection N engages the lower end of the rod N and lifts the same to cause an upward swinging of the catch N to lift the latter out of engagement wit-h its keeper N, so as to release the kicker E, which is now caused to swing forward by the action of its spring E In doing so the kicker engages with its lower endthe cut-01f and released block' of wood and pushes or kicks the same off the table A to one side of the machine. The kicker E is brought back to its forward position on the downward swinging of the lever F, and for this purpose the kicker is connected with one end of a chain 0, passing overa pulley O, journaled on the upright of the overhead framework G the chain then extending downward to connect with the lever F. When the lever F swings downward, a pull is exerted on the chain 0, the kicker is swung back into its vertical po-' sition, the spring E is again compressed, and the catch N is again engaged with its keeper N to lock the kicker in its normal position.
During the downward swinging movement of the lever F the link C the bell-crank lever 0, and the stop 0 are actuated to move the stop 0 into active position, as shown in Fig. 1, and then the operator causes the log to be fed forward until it abuts against the said stop 0. For this purpose the feed-rollers B have their shafts provided with bevel gear-wheels B, in mesh with bevel gearwheels B secured on a longitudinally-extending shaft B journaled in suitable bearings and provided with a bevel gear-wheel B in mesh with a bevel gear-wheel B, attached to the upper-end of a vertical shaft Bfllikewise j ournaled in suitable hearings and carryingat its lower end a bevel gear-wheel B engaging the bevel-wheel K, secured on one end of a shaft K, journaled in suitable bear ings on the framework G, carrying a friction-pulley K in mesh with a friction-roller K secured on a shaft K journaled at one end in a bearing held on a lever L, the other end of the shaft K being loosely journaled in a hearing held on a beam L, forming part of the framework G. The lever is pivotally connected by a link L with a hand-lever L extending above the platform G at one side of the lever J so that the operator can conveniently take hold with the right hand of the lever J and with the left hand of the lever L On the shaft K is secured a pulley K over which passes a belt K also passing over a pulley K secured on the main driving-shaft H, so that the rotary motion of the latter is transmitted by said pulleys K K and belt K to the shaft K and when the operator imparts a swinging motion to the lever L then the roller K is moved in mesh with the friction-pulley K and consequently the shaft K is rotated, and by the gearing described a rotary motion is transmitted to the spiked rollers B, forming the feeding device for the log. Thus when the rollers are rotated the log is advanced, and when the log abuts against the stop 0 the operator swings the lever L back to its forward position to move the roller K out of engagement with the pulley K and stop further feed of the log. The operator then actuates the lever J to cause an upward swinging motion of the lever F for the saw D to cut off another piece of the log, as above explained. The above-described operation is then repeated-that is, the kicker is-released and the sawed-oft block is pushed off the table A. The lever F is again caused to swing downward, and then the log is again fed forward until it abuts against the stop C. The lever F is preferably counterbalanced, and for this purpose is connected near its free end by a link F with a lever F carrying a weight F, as is plainly shown in Fig. 1.
Having thus fully described my invention, I claim as new and desire to secure by Letters Patent- 1. A log-sawing machine, provided with a feeding device for the log, a lever mounted to swing up and down and under the control of the operator, a circular saw journaled in the free end of the lever and adapted to pass transversely of the feeding devices at the front end thereof to saw the log thereon, a movable stop for the end of the log to abut against, the stop being connected with and actuated from said lever, and a movable block-kicker normally held in a locked position and out of engagement with the front end of the log, said kicker being automatically unlocked by said lever at about the time the saw has passed through the log and the stop has been withdrawn to allow the kicker to move the cut-off block transversely off the log-feeding device, substantially as shown and described.
2. A log-sawing machine, provided with a pivoted spring-pressed kicker for automatic ally pushing the cut-off block away from the log, a locking device for normally holding the kicker in an inactive position, and a releasing device for the said locking device to release the latter and the kicker at the time the saw has cut off a block from the log, to allow the kicker to push the block from the end of the log, substantially as shown and described.
3. A log-sawing machine, provided with a lever carrying the saw, a movable springpressed kicker normally locked in an inactive position, and a connection between the said lever and the kicker, to release the latter at the time the saw has cut off a block from the log, to allow the kicker to push the block from the end of the log, substantially as shown and described.
4.. A log-sawing machine, provided with a lever carrying a circular saw for cutting 0d a block at the end of a log, a kicker mounted to move transversely of the log at the front end thereof, a spring pressing said kicker, a locking device for locking the kicker against the tension of its spring, and a releasing device for the said kicker and controlled by said saw-carrying lever, substantially as shown and described.
5. A log-sawing machine, provided with a lever carrying a circular saw for cuttingofi a block at the end of a log, a kicker mounted to move transversely of the log at the front end thereof, a spring pressing said kicker, a locking device for locking the kicker against the tension of its spring, and a releasing device for the said kicker and controlled bysaid saw-carrying lever, said releasing device consisting of aslidable rod adapted to be engaged by said lever and adapted to engage a lockingcateh on said locking device, to move the catch out of its keeper and release the kicker, substantially as shown and described.
6. A log-sawing machine, provided with a lever carrying a circular saw for cutting off a block at the end of a log, a kicker mounted to move transversely of the log at the front end thereof, a spring pressing said kicker, a locking device for locking the kicker against the tension of its spring, a releasing device for the said kicker and controlled by said sawcarrying lever, a stop for the front end of the log to abut against, and a bell-crank lever connected with the said stop and with the said saw-carrying lever, substantially as shown and described.
7. A log-sawing machine, provided with a saw-carrying lever, a movable kicker, a looking device for said kicker, and a connection between said lever and said kicker, to move the latter back into a locking position, substantially as shown and described.
SAMUEL W. BUTTERFIELD.
THEO. G. HOSTER, EVERARD BoLToN MARSHALL.