US567153A - Veneer - Google Patents

Description

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L. A. MGRRISON & J. LARSBN. v MACHINE FOR MANUFACTURING V'BNEER.

Na. samsa. Patented Sept. 8, 1896.

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L. A MORRISON & J LARSEN MACHINE FOR MANUPAGTURING VENEER. No. 567,153.

Patented Sept. 8, 1896.

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L. A. MORRISON & J. LARSEN. MACHINE FOR MANUFAGTURING VENEER.

' No. 567,153. Pat ted Sept. 8, 1896.

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" L. A. MORRISON & J. L-ARSEN.

MAGHINE FOR MANUFACTURING VENEER.

' No. 567,153. Patented Sept.'8, 1896.

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LLEVVELLYN A. MORRISON AND JOHN LARSEN, OF TORONTO, CANADA; SAID LARSEN ASSIGNOR TO SAID MORRISON.

MACHINE FOR MANUFACTURING VENEERS.

SPECIFICATION forming part of Letters Patent No. 567,153, dated September 8, 1896.

Application filed February 7, 1893. Serial No. 461,403. (No model.)

To aZZ whom it may concern.-

Be it known that we, LLEWELLYN A. Mon- RISON and JOHN LARSEN, of the city of Toronto, in the county of York, in the Province of Ontario, Canada, have invented a certain new and Improved Machine for the Mannfacture of Veneers, of which the following is a specification.

The object of the invention is to produce a veneer-cutting machine in which the angle of the veneer-knife may be altered to suit the thickness of the veneer to be out without moving the cutting edge of the said knife, and to arrange, in connection with the veneermachine, a crosscut-knife which will automatically cut the sheets of veneer into predetermined lengths; and it consists, first, of a veneer-knife having its cutting edge set on a line leading to the center of the log and carried on a circular bearing having the cut ting edge of the knife as the center of its circle; second, of a crosscut-knife provided with mechanism arranged in connection with the veneer-machine,-s0 that the movement of the veneer shall put the mechanism into action at predetermined periods, so as to cut the sheet-veneer into predetermined lengths, the machine being otherwise constructed in detail as hereinafter more particularly explained, and then definitely claimed.

In the accompanying drawings, Figure 1 is a perspective view of our improved machine. Fig. 2 is an enlarged cross-section of the veneer-knife and its supports. Fig. 3 is an enlarged perspective detail of the gearing for feeding the carriage. Fig. 4 is a perspec-' tive view of the scarfing-carriage. Fig. 5 is a cross-section of the scarfingcarriage and the log on the line 0c 41;, Fig. 4. Fig. 6 is a sectional elevation of the clutch-pulley. Fig. 7 is a sectional elevation showing the balljournal on the log-spindle. Fig. 8 is a perspective View of a crosscut-knife and mechanism connected therewith. Fig. 9 is an end section of the crosscut-knife. Figs. 10, 11, and 12 are details of the friction-pulley. Fig.

13 is a view showing the connection between the veneer and crosscut-knife.

A represents the main frame of the machine; B, he carriage; O, the block or frame by which the veneer-knife D is supported. Each end of this block or frame 0 is shaped on a circle and rests upon a block E, formed on a circle and fixed to the carriage B. The face of each block E and bottom of the block O,restin g thereon,are shaped on a circle struck from the cutting edge of the knife D. Consequently by moving the block or frame O in its supports the angle of the veneer-knife D may be altered without moving the cutting edge of the said knife. The angle of the block or frame O is adjusted by the movement of the set-screws F, the jam-nuts G being employed to lock the frame 0 when it has been set at its proper angle. As the cutting edge of the knife is the center of the circle on which the bearing is formed and as the said cutting edge is set on a line leading to the center of the log any adjustment of the angle of the knife for the purpose of cutting thin or thick veneer is accomplished without moving the position of the cutting edge. The cutting of the knife will remain the same whether in removing a thin or a thick veneer. I

H is a pressure-bar slidingly supported upon the block or frame 0. A worm-wheel I, connected to a spindle and situated one at each end of the frame C,is connected by means of a nut to the pressure-bar H in sucha manner that the revolving of the worm-wheel I adjusts the pressure-bar I-I toward or away from the log. A spindle J is supported, as indicated in Fig. 1, which has two worms K formed on it to engage with the worm-wheels I. On one end of the spindle J we place a crank or hand wheel L in order that the operator of the machine may easily adjust the pressure-bar H to suit the thickness of the tion and operation of the scarfing-knife-N will be understood. This scarfing-knife is fixed on the spindle O, which is pivoted or j ournaled in the frame or bracket P, suitably connected and carried by the pressure-bar II. Q, is a bar connected to the spindle O and designed to rest upon the spindle R, by which the log is supported. S is a spring connected to the swinging frame by which the knife N is carried. This spring is acted upon by a set-screw T, so that the depth of the cutting made by the knife may easily be regulated. The scarfing-knife N is placed in the proper position and set at the proper angle to bevel or scarf the end of the log, and the bar Q rests upon the spindle R, by which the log is supported, and the scarfing-knife is held at the proper relative angle to the circumference of the log during the whole time that the sheet of veneer is being cut off.

In Fig. 7 we show a sectional detail to illustrate the antifriction-bearing which we provide to resist the thrust or back pressure upon the end of the spindle R. This spindle, it will be observed on reference to Fig. 7, passes through a sleeve U, which is supported by the frame A. The outer end of the sleeve U carries a threaded spindle R which is screwed through a nut V, formed on or connected to the interior of the spindle R. The spindle R is held from end motion by the hub of the hand-wheel U and the collar U It will be seen from this construction that the spindle R may be readily adjusted lengthwise and that its thrust is entirely conveyed to the sleeve U. Between the flange TV, on the end of the sleeve U, and the face of the frame A we place three annular plates or rings a, b, and c. The plates at and c are preferably made of hardened steel and the plate or ring I) of brass. This latter ring has a series of holes cl, (see Fig. 7,) which are arranged as shown zigzag around the center of the plate or ring 0, as shown. Into each of these holes at we insert a small ball 6, preferably made of hard steel and projecting slightly through both sides of the plate I), so that the plate a and 0 will fit against the balls 6 when they are brought together, as indicated in Fig. 7. By providing the balls 6 in the position indicated, the weight of the back thrust 011 the spindle R will be entirely carried by them, and as they are arranged so that they do not follow each other the surfaces of the plates a and 0 will not be channeled by the action of the balls as much as it would be if the balls were arranged in line, and it will be found that the friction from the said back pressure will be imperceptible.

X is a rod suitably supported in bearings in the frame A and provided with two miterpinions Y, arranged to mesh with miter-wheels Z, which are fixed to the screw-spindles by which the carriage B is adjusted. Near the end of the rod X, which is divided, as indi cated in Fig. 6, we fix a clutch A, and opposite to the clutch A we loosely journal a similar clutch B, which is driven by an independ (Not-shown in the drawings.) Beent belt.

tween the clutches A and B we place the movable clutch O, which is held to the rod X by a feather-key (not shown) and which permits it to be longitudinally adjusted on the red X. The two ends of the clutch O are shaped to engage with either of the two clutches A and B. are engaged with the clutch A. Consequently the rod X is made to revolve in the direction necessary to move the carriage B toward the log. This motion is produced from the main shaft by means of the gearing shown in Figs. 1 and 3, which is suiiiciently clear in the drawin gs to avoid the necessity of further descrip tion in the specification, particularly as we do not claim anything peculiar in the said gearing; nor do We claim anything very special in the clutch, but, however, we do claim some originality in the mechanism we use for moving the clutch C, by which the motion of the carriage is automatically arrested.

On reference to Fig. 3 it will be observed that we provide a forked rod D, which engages with the groove E, (see Fig. 6,) formed in the clutch O. This rod is pivoted at f and extends back over the rock-shaft F. 011 this red we fix a dog g, which serves as a lock to hold the forked rod D in position while the gearing is in action. A spring 7b is fixed to the rod D and is set so as to fit below the dog g, so that the rod D shall beheld against the said dog.

Gr is a crank fixed to the rock-shaft F, and from this crank G we carry a rod H. Acollar j is formed on the rod 11. When the carriage by which the knives are supported has been fed in as far as desired, it comes in contact with the collarj, which pushes the crank G over and carries the dog g clear of the forked rod D, which Will immediately spring past the said dog by the action of its spring 72 and thus carry the clutch C clear of the clutch A, and thus stop the forward movement of the carriage. The clutch C is run by an independent belt in the opposite direction to that in which the clutch A is caused to revolve. In order to cause the carriage to travel back, the clutch O is moved so as to engage with the clutch B.

The foregoing is a description of the mechan ism we employ for cutting the veneer from the log, and as it is necessary or advisable to cut the sheets of veneer into predertermined sizes we provide the following mechanism to work in connection with the mechanism just described. a

Fig. 8 is a perspective view of the crosseutknife.

The side frame 2 is suitably connected to support the following parts:

3 is the bed-plate, provided with the bearing-boxes 4. In these bearing-boxes is fitted the shaft 5. The portions of the shaft 5 which fit into the bearing-boxes i are concentric with the center of the shaft 5.

6 is the cross-head, arranged to support the As shown in Fig. 1, they knife 7. Bearing-boxes '8 are made in the cross-head 6 to rest upon and be fitted to the shaft 5. The portions of the shaft 5 which fit into the bearing-boxes 8 are eccentric to the center of the shaft 5. Consequently when the said shaft revolves the cross-head 6 will Joe caused to rise and fall in proportion to the throw of the eccentric formed on the said shaft 5. In order that the entire weight of the cross-head 6 and its knife 7 shall not be carried by the bearings, we provide springs 9, which are arranged to support the major portion of the weight.

10 is a beam having jaw-shaped ends 11. Each end 11 is connected to its frame 2 by the pin 13, and at each end 11 a block 14 is fitted into the jaw. These blocks 14 are connected, respectively, to-each end of the crosshead 6 by means of a pin 15. The projection 16 is made on the end of the cross-head 6 and is flexibly connected to the short shaft 17, which is movably connected to the block 18, formed upon or attach ed to the end of the vertical shaft 19-, which is geared, as indicated in Fig. 8, to the shaft 5. The block 18 acts as a crank upon the shaft 19-, and as the short shaft 17 is adjustable in the said block the length of the throw of the crank may be altered to give the length of the stroke to the knife desired. As the beam 10 is pivotally connected to the frame 2 and the cross-head 6, carrying the knife 7, is pivotally connected to the blocks 14 in thebeam 10, the said crosshead with its knife will move freely without fear of any binding or straining of the parts. On the bottom of the beamv 10 we connect by clamps 20 a piece of hard wood21, which acts as a cutting-block against which the knife 7 acts while cutting the sheet of veneer which is carried between the said knife 7 and beam 10. Owing to the arrangement of the parts described, when the shaft 5 revolves the cocentric portion of the said shaft imparts, as before described, an upward and downward movement to the knife 7, and a longitudinal movement is simultaneously imparted to the said cross-head, and as the knife 7 is carried by the said cross-head a similar cutting movement is imparted to the said knife, causing the knife at each revolution to act. upon the veneer carried past it.

On reference to Fig. 9 it will be observed that an extension-piece 22 isformed on the cross-head 6 to form a back for the knife 7, and to this back 22 we pivot one or more spindles 23 to fit into springs 24, thereby formingflexible supports to the extensionpiece of the cross-head 6 in order that the said cross-head may be supported and yet move freely in the different positions required. In order that the knife 7 will only act at predetermined periods, we-provide the following mechanism, by which the cross-cutting machine is thrown into action when required'by the movement of the veneer leaving. the veneer machine: A pulley 25 is loosely joun naled upon the shaft 5, and has a projecting rim into which the following clutch mechanism is inserted. This consists of half-rims 26. In the center of each half-rim 26 a projection 27 is placed, and from this projection a pin 28 extends and fits into one of the arms of the spider 29. (See Fig. 11.) To each projection 27 two springs 30 are connected at one end, the other end of each spring being connected to the spider 29, the tension of the said springs holding them close together, so that the outer periphery of the half-rims 26 shall not be in contact with the inner circumference of the pulley 25. Consequently the said pulley 25 will continue to revolve freely until the rim 26 is brought into contact with it. On the inside of each half-rim 26 a lug 31 is formed, and through each of these lugs a set-screw engaging the end of the pivoted dog 32 is placed.

On the end of the arm 33' of the spider 29 we pivot a fly 34, and. on the end of its pivot we connect an arm 35, and the other end of the said arm is connected to. the plate 36, which is attached to or forms part of the hollow sleeve 37 (see Fig. 12,.) in which sleeve a spiral spring 38 is. placed, one: end of this spring being fixed to the sleeve 37, which is loose on the shaft 5, and the other end to a collar 39, which is secured to the shaft 5.

40 is an arm connected to the sleeve 37 and extending behind the stop 41. The normal position of this stop is in the path of the arm 40, and so long. asthe. stop ll remains in this position it resists the strain of the spring 38, and the fiy 34 is held in such a position as to be clear of the dogs 32,, and the rims 26 remain clear of the pulley 25.. The moment that the stop 41 is moved clear of the arm 40 the spring 38 immediately causes the sleeve 37 to revolve in the direction of the arrows, thus moving the arms 32 by means of the arms 35 and fiies 34, and pulling the halfrims 26. apart and pressing. them against the interior surface of the pulley 25,.thereby connecting the said pulley 25 to the shaft 5 and causing the said shaft to. revolve. By the time that the shaft 5 has made one revolution the stop 41 has byi-ts spring 42- returned to. its initial position in the path; of thearm 40, arresting the motion of the said arm andconsequently of the sleeve 37, thereby moving the arm33 so as to throw the fly'34 clear of the dogs 32,.thereby permittingthesprings 30 to draw the rims 26 together, clear of the interior surface of the pulley 25, consequently arresting the motion of the shaft 5. Simultaneously with the arm iO'comi ng in contact with the stop-41 the arm 43. strikes the said stop, and as this arm. 43 is fastenedtothe shaft 5 the, said shaft is thereby prevented being acted upon by the spring. 38-;

Various devices may be arranged to cause the stop-4L1 to; be tripped, but the following will be found a simple device: On reference to. Fig. 13 a trigger'ii willbe observed located IIO at the end of the veneer 45, which, as shown in this figure, has been cut by the veneer-ma chine and carried over the knife 7. By the time that it has reached the trigger 44 it is time that the sheet should be cut oif, to do which it is necessary to start the mechanism by which the knife 7 is operated. It will be noticed that the trigger 44 is pivoted on the end of a rod 46 and that this trigger is connected to the horizontal rod 47, so that when the veneer 45 pushes against the trigger 44 the rod 47 is rolled so as to throw the arm 48 (see Fig. down, and as this arm 48 is connected to the stop 41 by the spring-dog 49 the said stop 41 is drawn down clear of the arm 40, thereby bringing the clutch mechanism into contact with the pulley and thus cause, as already described, the shaft 5 to revolve. The moment that the stop 41 is carried clear of the arm 40 the said arm strikes the dog 49, throwing it off the stop 41, which is instantly brought back into its initial position by the action of its spring 42. The moment that the clutch mechanism already described is carried clear of the pulley 25 the action of the knife 7 is stopped until sufficient veneer has passed it to strike the trigger 44, when the cutting action is once more started. It will of course be seen that by moving the trigger 44 the length of the sheet to be cut off may be altered.

What we claim as our invention is- 1. In a veneer-machine, and in combination with log-supporting means and the pressurebar, of a swinging frame, a scarfing-knife pivotallysupported in the frame, a spring secured to the said frame and bearing on the knife, and an adjusting-screw to set against the spring and adjust the cut of the knife, substantially as shown and described.

2. In a veneer-machine, and in combination with log-supporting means and the pressurebar, of a frame pivotally supported on the pressure-bar, a scarfing-knife pivotally supported in the said frame, a spring to bear on the knife, an adjusting-screw to set against the spring to adjust the cut of the knife, and means for automatically adjusting the knife to keep it at the same angle to the leg as the log decreases in size, substantially as shown and described.

3. In a veneer-machine, the combination of a shaft having bearings concentric to the axis thereof, and portions intermediate of the bearings thereof eccentric thereto, a cross-head having bearings on the eccentric portions of the shaft and formed with a back piece, a knife seated in the back piece, and yielding supports connected to the back piece,wl1ereby the cross-head is supported to move freely in its different positions, as specified.

4. The combination with the knife-operating shaft having an eccentric portion, the cross-head and knife operated thereby, said knife being carried and supported by the cross-head, of springs 9 arranged under the cross-head, one end of said springs being connected to a laterally-projecting portion of said cross-head and the other end to a pro jecting portion on the base of the machineframe, substantially as shown and described.

5. In a veneer-machine, the combination of the beam 10, having jaw-shaped ends 11, supported 011 pins 13, and provided with a buffer-strip of wood 21 fixed to the bottom edge of the beam, a vertically-reciprocating crosshead 6 having the ends arranged to slide in the jaws on the beam ends, a knife secured to the cross-head, and means to reciprocate the cross-head, substantially as shown and described.

6. In a veneer-machine, a knife for cutting the veneer into predetermined lengths, mechanism for operating said knife, and a clutch for putting said mechanism into and out of gear, a stop 41 acting on said clutch to hold the knife in an inoperative posit-ion, a rockshaft provided with means for moving said stop, and a trigger having a connection with said rock-shaft and arranged to be struck and moved by the veneer, thereby rocking said shaft and cutting said veneer, substantially as described.

7. In a veneer-machine, a knife arranged to cut the veneer into predetermined lengths, a driving-shaft 5, having a spider fixed thereto and adapted to operate said knife, a pulley loosely journaled on said shaft and provided with a projecting rim, half-rims connected to said spider and held inside of said pulley, springs normally holding the rims together, flies connected with the spider and adapted to separate the half-rims, arms 35, each having one of its ends connected to one of the flies and its other end to a sleeve on said driving-shaft, a spring having one end connected to said sleeve and its other end having a connection with said shaft, an arm projecting from the said sleeve and a stop in the path of said arm, in combination with means for moving said step arranged to be operated by the veneer as it leaves the machine, substantially as and for the purpose specified.

8. In a veneer-machine, a knife arranged to cut the veneer into predetermined lengths, a driving-shaft having a pulley thereon and arranged to operate said knife, a clutch mechanism within said pulley adapted to start and stop said shaft, an arm 40 depending from said mechanism, and a stop 41 in the path of the stop 40 arranged to keep the driving-shat? t inoperative, in combination with mechanism arranged in the path of the veneer as it leaves the cutting apparatus and constructed to move the stop 41 by the action of the veneer when leaving the machine, whereby the driving-shaft is operated and the veneer cut, substantially as described.

9. In a Veneer-machine, a knife arranged to cut the veneer into predetermined lengths, a driving-shaft having a pulley thereon and arranged to operate said knife, a clutch mechto be operated by the said veneer, whereby 1o anism within said pulley adapted to start and the driving-shaft is operated and the Veneer stop said shaft, an arm 40 depending from out, substantially as described.

said mechanism, and a stop 41 in the path of Toronto, January 26, 1892.

said stop 40, in combination With the rock- LLEWELLYN A. MORRISON. shaft 47, arm 48 connected thereto, and a JOHN LARSEN.

trigger 44 having a connection with said rock- In presence ofshaft and arranged in the path of the Veneer O. M. NEFF,

as it leaves the cutting apparatus and adapted J. EDW. MAYBEE.

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