US492746A

US492746A - Wood-sawing machine

Info

Publication number: US492746A
Authority: US
Publication date: 1893-02-28
Anticipated expiration: 1910-02-28

Description

. 3 Sheets-Sheet 1.

(No Model.)

W. D. HOPKINS. WOOD SAWING MACHINE.

Patented Feb. 28, 1893,

v.NO. 492,746.

Witnesses.

2 t e e h S S u 6 e h S 3 D d M d O M o m WOOD SAWING MACHINE.

Patented Feb. 28, 1893.

Witnesses.

(No Model.)

3 Sheets-Sheet- 3. W. D. HOPKINS. WOOD SAWING MACHINE.-

No. 492,746. Patented Feb. 28, 1893.

Witnesses.

6 (if/W41.

You, a. c.

7 UNITED STATES PAT NT OFF QE.

VILLIAM D. HOPKINS, OF GOFFSTOWN, ASSIGNOR OF ONE-HALF TO HENRY WV. HOPKINS, OF WILTON, NEW HAMPSHIRE.

WOOD-SAWIZING MACHINE.

SPECIFICATION forming part of Letters Patent No. 492,746, dated February 28, 1893.

Application filed August 6, 1891.

T0 a ZZ whom it may concern:

Be it known that I, WILLIAM D. HOPKINS, a citizen of the United States, residing at, Goifstown, in the county of Hillsborough and State of New Hampshire, have invented a certain new and useful Improvement in VVood- Sawing Machines, of which the following is a specification.

My invention relates to wood sawing machines of the class adapted to saw a log or stick transversely into blocks and is particularly adapted for sawing logs or sticks into blocks to be converted partly by chemicalmeans into wood-pulp for paper.

In the accompanying drawings, on three sheets, Figure 1 is a plan of a wood-sawing machine constructed in accordance with my.- invention; Fig. 2, aside elevation of a part of the carriage, one of the racks by which the carriage is prevented from moving backward, the dog which engages said rack and a transverse section of the dog-releasing shaft and feed-bar; Fig. 3, a plan of a part of the carriage, omitting the log-holding troughs; Fig.

4, a side elevation of the devices which set over the stock for a new cut and the devices which disengage the feed-racks and the feedbar; Fig. 5, a rear elevation of the machine, omitting the upper parts of the band-saws, their upper pulleys, a part of the track-sup porting rails and a part of one of the double inclines; Fig. 6, a side elevation of the dogpost and dogs; Fig. 7, a horizontal section onthe line 7 7 in Fig. 6; Fig. 8, a front elevation of said dog-post and dogs; Fig. 9, a plan of the same; Fig. 10, a left end elevation of the machine; Fig. 11, a plan of the reversing-arms and their eccentric; Fig. 12, a rear elevation of said reversing-arms, their eccentric, a part of the sliding journal-box which supports the shafts of the friction wheels and the brackets between which said eccentric revolves.

Upon the fioor or other surface A rest parallel stringers or longitudinal supporting timbers B B, on which are secured, by screws 0 c, rails O 0, represented as having longitudinal ways or raised Vs 0 0 on which run the grooved supporting-wheels d d of the carriage D. The carriage D is a rectangular frame, the front rail (1 and back rail d of .which are parallel with the track-rails C G erial No. 401,851. (No model.)

and have hangers d 02 secured to their under sides, in which hangers are Journaled the supporting-wheels d cl in a well known carry at their front endsfriction-wheels f f fast on-said shafts and lying in the same vertical planes with said friction-drum. The front journal-boxes f f of said shafts'are secured on a slide f, said slide having longitudinal slotsf fi, through which boltsf f are passed, I

to hold said slide down to its supporting-surface while allowing a longitudinal movement of said slide sufficient to bring either of the friction-wheels f f into contact with said friction-drum and, to facilitate the longitudinal movement of the slide, the rear journalboxes ff'.rnay turn slightly upon vertical pivot-bolts f f. Another shaft F is supported in journal-boxes f f between the shafts F F, and is provided with a fast pul- 8o ley f connected by a suitable belt, not shown, to any motor. The shaft F is provided with speed-cones f f, connected by belts f f 18 to other speed-cones f f fast on the shafts F F respectively, said speed-cones 8 being used for the obvious purpose of changing the speed of theshafts F F, the belt f" being a crossedbelt and the belt-f being an open belt, to drive the friction-wheels fif in opposite directions and to reverse the movement of the friction-drum e and thereby reverse the direction in which the carriage moves as said friction-wheels are alternately brought into contact with said friction-drum, the shaft F having a constant rotation in the 5 same direction.

A reversing-shaft G is supported in a journal-box g and is provided with an eccentric 9', fast thereon and arranged between two brackets g 9 rigidly secured on the slide f [00 in contact with said eccentric, so that a partial revolution of said reversing-shaft G will give a longitudinal movement of said slide sufficient to bring one of the friction-wheels f f against the friction-drum e and carry the other of said friction-Wheels out of such contact.

Upon the reversing shaft G are secured in different planes and at angles with each other, two arms g g and to the carriage D are rigidly secured two laterally-extending arms at d each provided with a down-hanging stud (1 61 one d of said studs being in the same vertical plane in which the arm g swings and the other d of said studs being in the vertical plane in which the other arm g swings, that is, the stud d or d which follows (when the carriage is moving in either direction) strikes the arm 9 or g last reached by said following stud. The arms 9 g are provided with weights g g which cause said arms to complete their movement (in the direction to which. their combined center of gravity is thrown by the action of either of the studs (1 d), the movement of said arms being limited by the striking of the friction wheelsf f against the friction-drum 6 g g are at rest, one of said arms g is in a vertical or nearly vertical position and the other is inclined, as shown in Figs. 5, 11 and 12, and the friction-wheel (f orf) on the same side of the reversing shaft G with such inclined arm is in contact'with the frictiondrum 9 The end-rails d d of the carriage D are.

provided with horizontal slots (Z (Z in which slides a horizontal feed-bar H. Other transverse rails d d, as many as may be desired, precisely like the end rails d d and parallel with said end-rails are secured like said endrails to the back-rail d and front-rail 61*".

To the feed-bar H in each interval between an end-rail and the adjacent transverse rail is secured a vertical dog-post h, see Figs. 6 to 9, the lower part of said post it having a vertical slot h and the upper part of said post having a hole 71 which is in the same line with saidvertical slot. In the hole h turns the vertical screw h the lower portion of which passes through a screw-threaded hole h (shown in dotted lines in Fig. 6), in the shank of the lower dog 71 so that by turning the crank or handle 77. of said screw the lower dog is raised or lowered, said screw having a collar it, fast thereon, which rests upon the top of the post and prevents a downward movement of said screw. When the lower dog is in its proper position, the screw 77. is prevented from turning by a fork or holder h pivoted on an arm h or bracket, secured to the post h, said fork engaging an enlarged end h of thecrank 77. thereby preventing not only the lower dog from movement but also holding the crank parallel with the frontrail 01 of the carriage D and out of the reach of the saws M M, hereinafter referred to.

On each transverse rail, including the endrails, is supported one half or inclined side 2' 1; of a trough I, there. being as many such When the arms troughs as there are dog-posts and the sides of. said troughs flaring upwardly, as shown in Fig. 5. In each troughlis placed,transversely of the carriage D, a log I, after squaring the ends of the log, the rear end of the log being arranged above the dog h Another dog h surrounds the reduced upper part of thepost 71, said upper part of said post being, as shown in Fig. 7, thicker from front to back than laterally and passing upward through a hole in said upper dog, said hole 71. being slightly larger than the part of the post 71 which it surrounds to allow said dog to be raised upon said post to admit the end of the log and the sides of said hole engaging said post and preventing the rising of said dog on said post when the front end of said dog is raised. The upper dog is substantially like the lower dog 71 except as above stated, and except also that it is provided with a handle to enable said dog to be raised and lowered quickly and conveniently. The log being placed in the trough I, when the lower .dog h is in its lowest position, the upper dog is lowered against the top of the log and its teeth maybe driven into said log, if desired, the handle being pressed downward, and the lower dog h is raised by the screw W, as above described, until said lower dog enters the lower side of the log. The outer teeth 71 h of each dog are longer than the inner teeth 72, 71. of the same to adapt said dogs to the curvature of the log.

The feed-bar H is provided, at each end thereof,w1th a fixed dog j 3'' adapted to be engaged by the teeth of a feed-rackj j held over said dog by a guide j j, in which said rack is capable of a vertical movement, said rack near its rear end being pivoted, at j f, to a radial arm j j of the rock-shaft J. The rock-shaft J is journaled in the transverse rails of the carriage D and between the ends of said rock-shaft is provided with a rearwardly-extending arm 7' carrying an antifriction roll j", adapted to run up on eitherof two inclines K K, similar to each other except that they are inclined in opposite directions, each incline descending toward the other and toward the shaft E. When the arm j is raised by either incline the racks 7' j are pushed forward, carrying the dogs jj' and the feed-bar H forward and therefore carrying the post h and log I forward and this forward movement takes place just after the carriage D passes the saws M M in either direction and pushes the logs forward far enough to be cut by the saws when the motion of the carriage is reversed. A stop, represented as a rail or bar d extending from end to end of the carriage and secured to the undersides of the rear ends of the end rails below said'arm prevents said arm from falling below said inclines. The arm 7' is brought down'to said stop by its own gravity or by a spring which may be a spiral spring 7' surrounding said rock-shaft J and attached at one end to said army and at the other to one of the trans- IIO verse rails or other fixed part of the carriage D. Other transverse-racks L L are stationary on the carriage and are engaged by retaining pawls Z Z pivoted on the feed-bar H and said last-named racks and retainingpawls normally prevent a backward movement of the carriage or movement away from the cutting plane of the saws, the teeth of the feed-racks and retaining-racks all pointing forward. When the carriage has reached the limit of its forward movement, the racks fij? are raised out of engagement with the dogs 3' j by means of the cam-shaft J, journaled in the transverse-bars of the carriage and hav ing cams j j, fast thereon, and having a radial arm f secured thereto, which arm 7' being turned over forward causes said cams to press upon said racks in the rear of their pivots in the arms j j and raises the toothed front portions of said racks. The pawls Z Z are raised out of engagement with the racks L L by means of a shaft Z journaled at Z Z on the feed-bar H and having radial arms I Z which reach under said pawls Z Z and raise them when said shaft Z is raised by turning forward the radial arm Z secured to said shaft Z \Vhen all the racks 7' 7' L L are out of engagement with their respective dogs or pawls, the feed-bar H may be drawn back: ward by turning the hand-wheel n fast on the shaft N and causing the wheels 'n n also fast on said shaft N to wind up the straps n n each of said straps being secured at one end to said feed-bar and at the other end to one of said wheels at n. The carriage D is then reloaded and all the racks arebrought into engagement with their dogs or pawls by drawing backward the upper ends of the arms 7' Z and the carriage is started by setting the driving pulley f in operation. The track however may be made long enough to support a second carriage (not shown, but a duplicate of the carriage D) with its traverse rack 6 out of engagement with the pinion e and far enough away from said pinion not to be in the way of the first carriage and by making the incline K double, that is sloping said incline in both directions or adding to it the opposite incline K the second carriage may be run (to the left in Figs. 1 and 5) past said inclines K and K until the traverserack e of said second carriage engages the pinion e, care being taken, however, to remove the reversing-stud d from the arm 01 before said stud comes in contact with the arm 9 to allow the rack e of the first carriage or carriage moving to the left to run so far as to get out of engagement with the pinion. Of course, in like manner the incline K may be made to slope in both directions for the same purpose and a stationary carriage at either end of the track may be filled while another carriage loaded with logs is traversing and gradually becoming emptied, to cause as little delay as possible in submitting a new load of logs to the action of the saws after the sawing of a previous load is completed.

The traverse of the carriage carries the logs 1 past the band-saws M M which are of the usual construction and operation except that, in the machine herein described, two bandsaws are used, their descending members arranged in the same vertical plane with their backs toward each other, so that as the carriage D passes said saws in either direction a cut is made, the logs being set over at or near each end of the traverse for a new cut, as above described. The lower band-wheels m m of the band-saws M M are secured on the same shaft m with each other and with the fast pulley m a belt (not shown) on which fast pulley drives said shaft m which is journaled in suitable boxes m m at right angles with the shaft E, said saws being at equal distances from the front end of said shaft E. The upper wheels (not shown) of the bandsaws'are separately adjustable in the usual manner. A suitable hopper 0, having a flaring upper end 0 is arranged between the wheels m m in the rear of the pulley m and receives the blocks cut from the logs I and may conduct such blocks into a lower room or on to an endless conveying belt of 'ordinary construction, which deposits the blocks in any convenient place.

The machine above described may be used not only for cutting logs into blocks of a suitable size to be placed in the boiler or converter, used in the process of making paperpulp, but for cutting such blocksfor any purpose, as blanks for spools and numerous other articles.

I claim as my invention- 1. The combination of the carriage, the feedbar, adapted to slide thereon, dogs, fixed on said feed-bar, a rock-shaft, provided with arms, racks, pivoted to said arms and eng'ag ing said dogs, another shaft, journaled on said carriage, Wheels, fast on said last-named shaft, and straps or flexible connections, each attached at one end to said feed-bar and at the other end to one of said wheels, as and for the purpose specified.

2. The combination of the carriage, the feedbar, adapted to slide thereon, dogs, fixed. on said feed-bar, a rock-shaft, provided with arms, racks, pivoted to said arms and engaging said dogs, a cam-shaft, provided with cams and adapted to be turned to press said cams against said racks and throw said racks out of engagement with said dogs, another shaft, journaled on said carriage, wheels, fast on said last-named shaft, and straps or flexible connections, each attached at one end to said feed-bar and at the other end to one of said wheels, as and for the purpose specified.

3. The combination of the carriage, the feedbar, adapted to slide thereon,'dogs, fixed. on said feed-bar, a rock-shaft, provided with arms, feed-racks, pivoted to said arms and engaging said dogs, a cam-shaft, provided with cams and adapted to be turned to press said cams against said feed-racks and throw said feed-racks out of engagement with said dogs, retaining racks, fast on said carriage, dogs, pivoted on said feed-bar and engaging said retaining-racks, a releasing-shaft, having radial arms and adapted to be turned to disengage said dogs from said retaining-racks, another shaft, journaled on said carriage, wheels, fast on said last-named shaft, and straps or flexible connections, each attached at one end to said feedbar and at the other end to one of said wheels, as and for the purpose specified.

4. The combination of the carriage, a

trough, secured on said carriage and having a longitudinal opening or space between the sides thereof, at the bottom thereof, a feedbar, adapted to slide on said carriage below said trough, and dogs, secured to said feedbar, and arranged within said trough, as and for the purpose specified.

5. The combination of the carriage, a trough, secured on said carriage and having a longitudinal opening or space between the sides thereof, at the bottom thereof, a feedbar, adapted to slide on said carriage below said trough, a dog-post, secured to said feedbar between the sides of said trough and provided with a slot, dogs, adjustable on said post, one of said dogs being movable in said slot, a screw, to draw said last named dog toward the other of said dogs, to seize and hold a log arranged in said trough, as and for the purpose specified.

6. The combination of the carriage, a trough, secured on said carriage and having a longitudinal opening or space between the sides thereof, at the bottom thereof, a feedbar, adapted to slide on said carriage below said trough, a dog-post, secured to said feedbar between the sides of said trough and provided with a slot, dogs, adjustable on said post, one of said dogs being movable in said slot, a screw, to draw said last-named dog toward the other of said dogs, to seize and hold a log arranged in said trough, said screw being provided with a crank or handle, and a fork or holder, adapted to engage said crank or handle, to prevent the movement of said. screw, as and for the purpose specified.

7. The combination of two saws, arranged to cut in opposite directions in the same plane, a feed-carriage, having a reciprocating movement past said saws in a direction parallel with the cutting-plane of said saws, a feedbar, adapted to slide on said carriage, dogs, fixed on said feed-bar, a rock-shaft,journaled in said carriage and provided with arms, racks, pivoted to said arms and engaging said dogs, and stationary inclines, each adapted, in the movement of said carriage, to raise another arm, with which said rock-shaft is provided, and thereby to move said racks and feed-bar after each movement of said carriage past said saws in either direction, as and for the purpose specified.

In witness whereof I have signed this specification,in the presence of two attesting witnesses, this 31st day of July, 1891.

WILLIAM D, HOPKINS.

Witnesses:

ALBERT M. MOORE, lVIYRTIE C. BEALs.