US130754A - Improvement in machines for cutting veneers - Google Patents

Description

esheetS--shem J. N. SEIB. Improvement in Machines for Cutting Veneers. NO. 130,754. Patented Aug. 270, 18172.

3 Sheets--Sheet 1.N.VSE\B. Improvement in Machinesor Cutting Veneers. No. 130,754. Patented Aug. 20, H872.

Slheetsl--Sheet J-. N. SEIB.

Improvement in Machines for Cutting Veneers.

N0. 130,754, Patented Aug. 20, 1872.

M1. PhaTwL/mamn/wc caMxfUsHaRA/s Moons) UNITED 'STATES PATENT OFFICE.

JOHN N. SEIB, oFpBoSToN, MASSACHUSETTS.

IMPROVEMENT' IN MACHINES FOR CUTTING VENEERS.

Specification forming part of Letters Patent No. 130,754, dated August 20, 1872..

To all whom it may concern:

Be it known that I, JOHN N. SETE, of Boston, in the county of Suffolk and State of Massachusetts, have invented a new Improvement 'in Machines for Cutting Veneers; and I do hereby declare the following to lbe a full, clear, and exact description thereof, which will enable those skilled in the art to make and use the same, reference being had to the accompanying drawing forming part of this specilication, in which drawing- Figure l represents a plan or top view of my machine when` arranged to cut straight. Fig. 2 is a similar view of the same when arranged to cut veneers from a semi-cylindrical log. Fig. 3 is alongitudinal section of one ofthe spindles, between which the semi-cylindrical or cylindrical logs are fastened. This view is in a larger scale than the remaining figures. Fig. 4 is a transverse section of my machine, the line as m, Fig. l, indicating the plane of section. Fig. 5 is a similar section of the knife with its cap and support in the plane y y, Fig. 1. Fig. 6 is a transverse section of my machinewhen set for cutting veneers from a semicylindrical log, the line z z, Fig. 2, indicating the plane of section. Fig. 7 isV a similar section of the machine when set for cutting veneers from a cylindrical log.

Similar letters indicate corresponding parts.

This invention relates to a veneer-cutter which is so constructed that it can be readily set for cutting veneers from a flat or straight log, or from one of a semi-cylindrical or of a cylindrical shape; and my invention consists in a certain combination of machinery whereby the above purpose can be eected with ease and facility.

' In the drawing, the letter A designates a frame which forms the support for the working parts of my machine. From this frame rise two standards, B B,the edges of which are T-shaped, `and form guides for the staylog G, to which the dat or rectangular log D, Figs. 1 and 4, is secured. "Said stay-log connects 'by rods a a with working-beams b b, which swingon pivots c, Fig. 4, and to which an oscillating motion is imparted by connecting them to eccentric wrist-pins d, secured in cogwheels e, which are mounted on the opposite ends of a shaft, f. These cog-wheels gear into pinions g, mounted on a shaft, h, which can be made to slide in its bearings so that the pinions g can be thrown in or out of gear with cog-wheels e. On the shaft h is also mounted a cog-wheel, z', which gears in a pinion, j, on the drivingshaft k, and this pinion is made of such a width that it will not be thrown out of gear with the wheel c' when the shaft his made to slide in its bearings. On the shaftf is mounted a bevel-wheel lwhich gears in a corresponding bevel-wheel, m, mounted on the end of a transverse arbor, a, and in the face of this lastnamed bevel-wheel is secured an eccentric wrist-pin, o, which connects by a rod, p, with another eccentric wrist-pin, q, secured in the face of a disk, r, (see Figs. 1 and 6,) which is mounted on a transverse shaft, s, the front end of which has its bearings in a carriage, E, which supports the knife-carrier F, (see Fig. 5.) On the under surface of this knifecarrier is secured a toothed rack,`t, which gears in a cog-wheel, u, mounted on the shaft s, and

as the arbor a revolves, an oscillating motionis imparted to the arbors, andthe knife-carrier receivesatransversereciprocatingmotioninfront of the log,whereby the operation of cutting veneers is materially facilitated. In the disk r are secured two eccentric wrist-pins, one diametrically opposite to the other, so that by changing the rod p from one to the other the motion of the knife-carrier can be reversed and accommodated to the nature of the log to be cut. In the ends of the carriageE are secured two nuts, w, which iit on screw-spindles al and on the inner ends of these screw-spindles are mounted bevelwheels b1, which gear in corresponding bevel-wheels c1, mounted on a lon- Y gitudinal shaft, d1, which has its bearings in the main frame A. On this shaft is also mounted a ratchet-wheel, el, and a lever, f1, which swings looselyT on said shaft, and carries a pawl, g1, (see Fig. 4,) that engages with the ratchet-wheel el. ln this lever is secured a stud, h1, on whichrides a rod, il, that is hinged to an eccentric wrist-pin, d, in one of the wheels e, and which carries two tappets,I wk1, which straddle the stud h1, and'which mayr be so arranged that they can be set closer together or further apart, for the purpose of increasing or decreasing the motion imparted to the 1ever f1. As the wheele revolves an oscillating motion is imparted to the lever f1, and the shaft d1 receives an intermittent rotary mcerated by hand-wheels or cranks as.

tion, which motion is transmitted to the feedscrews al, and thereby the knife is moved toward the log once for every complet-e stroke or revolution of said log. motion the shaft s must be made to slide in its bearings in the carriage E. Y

By referring to Figs. l and 4 of the drawing it will be noticed that the stay-log C does not slide directly on the standards B, butit is connected to slides l', which are provided with holes to receive pins projecting f'romthe stay-log. By this arrangement I am enabledl to remove the stay-log C whenever I desire to insert a semi-cylindrical or, cylindrical log inv place of the rectangular or dat log D.

The knife-carrier F is provided on its under surface with ribs m1, which catch in aslot in the carriage E, and serve to retain said knifecarrier in position. Between the ribs m1 is secured the toothed rack t, (see Fig. 5,) by which a reciprocating motion is imparted to the knife-carrier. On the top of said knifecarrier is fitted a cap, G, the front edge of which is adjusted at the proper distance from the cutting-edge of the knife by means of pinions nl which are mounted on a shaft, o, extending through the cap Gr, and which pinions gear in racks p1 secured to the sides of the knife-ca-rrier. (See Figs. l and 4.)

When it is desired to cut veneers from a semi lcylindrical log, H, Figs. 2 and 6, the stay-log G is removed and the stay-log I is inserted. This stay-log is formed of a metal tube provided with longitudinal flanges or ribs q', for the purpose of attaching it to the log, and with end flanges, r', which are provided with holes to receive pins which projectffrom the chucks s. These chucks are also provided with center-points, (see Fig. 3,) which catch in the hole of the tubular stay-log I, and, by the aid of these center-points and pins, a firm connection can be effected between the staylog and the chucks. These chucks are secured to the ends of the tubular spindles t', Fig. 3, which slide in tubes u', being prevented from turning by screws c', which catch in slots in their sides. The tubes u have their bearings on one end in boxes secured to the main frame A, and on their oppositeends in the standards B, and through them extend screws w', which screw into the tubular spindles t', and are op- These screws are prevented from moving in the tubes u in the direction of their length, (see Fig. 3,) and, by turning them, the chucks s can be moved closer together or further apart, and consequently, if the stay-log I is brought in line with the spindles t, and the screws w are turned in the proper direction, the pins and center-points of the chucks s can be made to engage with the stay-log, and, by imparting to the tubes u( a rotary motion, the stay-log, together with the log attached to it, is caused to revolve. On the tubes u are mounted cogwheels yf, and if the shaft h, Fig.Y 2, is moved in the proper position, pinions z', which are mounted on' said shaft, are thrown in gear with To allow this feedcog-wheels y', and the motion which is im' parted to the shaft h from the driving-shaft is transmitted to the tubesu, and through them to thestay-log and to the log attached thereto.

The knife, the knife-carrier, and the knifecarriage used in cutting veneers from the semicylindrical log are the same as previously described. The carriage receives the same feed motion, land, if desired, a reciprocating motion may be imparted to the knife-carrier, or by disconnecting the rod p from the wrist-pin o, this reciprocating motion may be stopped.

In order to cut veneers from a cylindrical log, K, Fig. 7, I provide each end of the log with suitable holes to engage with the centerpoints and pins of the chucks s', and then I secure my log directly between said chucks without the use of a stay-log. In this case the reciprocating motion of the knife-carrier is stopped, and, as the knife is gradually fed toward the log, a continuous sheet of wood is cut off from the log. In order to cut this sheet inv veneers of convenient width, I extend through the knife-carrier, in the rear of the knife, two shafts, a2 b2, one below the other, (see Fig. 7 ,)vv and through the lower shaft a2 I pass a knifeblade, cz, the cutting-edge of which, on passing the upper shaft, extends close to the surface thereof. 0n the shaft a2 is mounted a" pulley, d2, which connects by a belt, e?, with a pulleyy, mounted on a shaft, g?, which has its bearings on brackets h?, sliding on pins 2, which rise from the standards B. From t-heA pulley f? extends a second belt, k2, to a pulley, Z2, which is mounted on a shaft, m2, that has its bearings in brackets n2, whichslide on horizontal rods o2, secured onthe main frame A. On the shaft m2 are also secured two or more friction-disks, p2, which are pressed up againstthe circumference of the log by springs or weights, and, as the log revolves, a rotary motion is imparted to the shafts m2, g2, and a?, and the sheet cut off from the log on passing through between the shafts a? b2, is cut in veneers or pieces of the required width. The belts e2 and 7a2 are kept taut by springs or weights acting on the brackets h2, which supu port the shaft g2. In order to save the cutting-edge of the knife-blade c2 the shaft b2 may, be covered with leather, India rubber, or other suitable material.

By these means I have produced a machine I for cutting-veneers which can be readily adiusted for cylindrical, semi-cylindrical, or flat logs, so that the wood can be cut to the best possible advantage with one and the same machine.

What I claim as new, and desire to secure by Letters Patent, is-- l. In a machine for cutting veneers theslides l1, chucks s', and screws w', in combination with the knife, the knife-carrier, and'the feedcarriage, all arranged and operating in respect to the stay-logs C I or K, substantially as described, for cutting veneers from a flat, semicyliidrical, or vcylindrical log, as herein set ort 1.

ceives a, revolving motion from a shaft bearing disks, which are held in frictionai contact with the cylindrical log, substantially as described.

` JOHN N. SEIB.

Witnesses 3. The knife-blade c2, secured in the shaft a2, W. HAUFF,

E. F. KASTENHUBER.

which has its bearings in the cap Gr, and re-

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