US145246A - Improvement in iviachines for cutting veneers - Google Patents

Description

.Y .2 Sheets--Sheet l. N. SEIB.

'Machines for Cutting Veneers. No. 145,245. Patented nec. 2,1873.

2 Sheets--Sheet'l N S El B.

y Machines for Cutting Veneers. A N0. 145,246. Patented Dec.2,1873.

f 'vez UNITED STATES PATENT :einen JOHN N. SEIU, OF BOSTON, MASSA(HUSETTS.

IMPROVEMENT iN MACHINES FOR CUTTING VENEERS.

Specification forming pari of licitus latfnt No. 145,1?46, dated Deccmhfr 2, 12573,; application filed O-.tcher 2, 1873.

To all fic/tom lit may concern:

Be it known that I, J onN N. SEIB, of lost0n, in the county of Suffolk and State-of Massachusetts, have invented a new and useful Improvement in Machine for Cuttin g Veneers 5 and I do hereby declare the following to be 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 specification, in which drawing- Figure'l represents a sectional side view of my veneer-cutting machine, when the same is fitted up for cutting straight. Fig. 2 is a transverse vertical section of the same. Fig. 3 is a detached section of the log-carrier in a larger scale than the previous figures. Fi 4 is a similar section of the knife-clamp. Fig. 5 is a plan or top view of the veneer-cutting machine when fitted up for cutting circular. Fig. 6 is a transverse section of the same. Fig. 7 is a transverse section of the circular log-carrier in a larger scale than the previous figures. Fig. 8 is a detached side view of one of the journal-boxes which form the bearings for the shaft support-ing the cireulanlog carrier.

Similar letters indicate corresponding parts.

This invention is an improvement on the veneer-cutting machines patented to me August 20,1872, April l, 1873, and August 5, 1873; and relates to the mechanism for imparting motion to the log-carrier and to the feed mechanism of the knife-carriage in cutting straight; further, to the construction of the 10g-retaining dogs on the log-carrier in cutting straight; also, to the means used for adjusting the knife at the required inclination or rake in cutting from different kinds of wood; further, to the construction of the circular log-carrier; also, to the construction of the journal-boxes which form the bearings for the shaft supporting the circularlog carrier.

In the drawing', the letter A designates the bed which forms the support for my machine. From this bed rise two standards,B B, the edges of which are dovetailed and form the guides for the stay-log C, to which a flat or rectangular log is secured, as shown in Figs. 1 and 2. Said stay-log connects, by rods a,

with working-beams I), which swing' on pivots c, and to which an oscillating motion is imparted by connecting' them to eccentric wristpins d secured in cog-wheels c, which are mounted on the opposite ends of a shaft, f. (Also seen in Fig. 5.) From one of the pitmen-rods g, which form the connection between the eccentric wrist-pins d and the working-beams b, extends a rod, 7L, to a lever, t, that swings freely on a shaft, j, and carries the feed-dogs 7.: l. rIhese feed-dogs extend from the lever 'L' in opposite directions, and they engage with a cog-wheel, m, that is mounted on the shaft j. Behind this cog-wheel is situated a disk, a, a segment of which is equal in diameter to the extreme diameter of theeog-wheel, while the diameter of the remaining portion is equal to that of a circle passing through the bottoms of the cogs of said cog-wheel.

The pawl L' is of such a width that it extends across the cog-wheel and the disk n, but the pawl l engages simply with the cog-wheel m and does not extend across the disk n. If the lever fi swings in the direction of arrow 1, Fig. l, the pawl l turns the shaft j during the entire motion of said lever i, but if this lever swings in the direction opposite to said arrow the pawl L' slides on the enlarged segment of the disk n and drops in gear with the cogwheel m after having' passed said segment. The shaft j is geared together with screwshafts o, which engage with blocks u, that support the knife-carriage E, and by the combined action of the dogs land L' the knife is fed forward just before the log commences its downward stroke, and before the log commences its upward stroke the knife is moved back a short distance, so that the log in its upward motion will not rub against the cutting-edge. The cog-wheels c gear into pinions p on the driving-shaft g, and by turning this driving-shaft a slow reciprocating motion is imparted to the log-carrier C. On the bed A is hinged a standard,D,whieh, when turned up to the position shown in Fig. 2, bears against the back of the log-carrier, and serves to steady the same. In cutting from a circular log, this standard must be turned down to the position shown in Fig. 5.

In a full-sized machine, where the log-carrier C is more than twelve feet long, two or more hinged standards may be applied. Said log-carrier is provided with dogs r, Fig. 3, which extend through slots s, and the shanks of which are provided with slots to receive the ends of screws t, which are tapped into flanges on the log-carrier. In the outer ends of each dog` are two or more holes, u, to receive a pin, which serves to adjust the head of the dog, so that the same will project more or less beyond the surf'ace of the log-carrier. By means of the screws t the dogs are forced up against the 100. (See Fig. 2.)

rlhe knife-carriage E is secured to its supporting-blocks u by means of screws x, which are tapped into spheres or rollers y secured in said blocks, Fig. l, and set-screws z, which pass through the langes of the knife-carriage, near its rear edge, serve to adjust the position of the knife in the desired inclination or rake, the roller-nuts y allowing the screws x to accommodate themselves to any desired inclination. For hard wood, the rake of the knife must be different from what it is for soft wood. The knife a! is secured to the knife-carriage by a series of clamping-j aws, b', which are grooved to engage with a tongue on the breast of the knife-carriage E', (Figs: 2, 4, and G.) Each of said jaws is drawn up against the knife by two or more clamping-screws, c', Fig. 4, and set-screws d serve to press the faces of the jaws firmly up against the knife, so that the knife `is rigidly retained in position. By unscrewing the set-screws d ,the knife is released, so that it can be readily removed whenever it may be desired, and not much time is lost in readjusting said knife.

When it is desired to cut from a revolving log, the reciprocating log-carrier C is taken off and the revolving log-carrier Gr is inserted. This carrier is composed of two halves, (sec Figs. 5, 6, and 7 which are united by screws, c', passing through lugs f. By unscrewing these screws the two halves can be taken apart, and by re-insertin g said screws the log-carrier is firmly clamped on this shaft. In each end of the log-carrier G is a groove, g', Fig. 5, to it in projections h', Figs. 2 and 5, formed on collars of the shaft f, so that when the logcarrier is clamped on said shaft it is effectually prevented from turning round independent of said shaft. Each half of the log-carrier G is provided with flanges t perforated with holes for the admission of screws j', by means of which the logs are secured to the log-carrier, as shown in Figs. 5 and 7. The shaft f has its bearings in braces II, Figs. 2 and 8,

which fit the corners of the standards B. Each of these boxes is provided with a cap, 7c', that is secured in position by a screw, l', and a setscrew, m', the latter being made to pass through a lug, nf, projecting from the body of the box. The object of this arrangement is to bring the shaftf as close to the edges of the standards B as can be practically done. If this shaft is far back of said edges, the knife-carriage, in order to enable the knife to cut close to the log-carrier, has to be moved out beyond its support, since this support can only be made to extend within a certain distance from the standards B, and if said knife-carriage has to be moved far out over its support it is liable to tilt over when the log comes in contact with the knife and the correct operation of the machine is disturbed. The feed-lever t is provided with two pins, o p', and if the machine is used with the revolving log-carrier G the rod h is changed from the pin o to the pin p',

and the reversing-pawl k is thrown out of gear. In cutting from a circular log it is not necessary to impart to the knife a backward motion.

XVhat I claim as new, and desire to secure by Letters Patent, is-

1. rlhe combination of pinions p, cog-wheel c, pitmen-rods g, workin g-beams b, rods a and h, feed mechanism 'i 7s Z on, knife-carriage E, and log-carrier G, all constructed and operating substantially in the manner herein shown and described.

2. rFhe standards D hinged upon the bed A,

in combination with the reciprocating log-carrier C, to operate in the manner and for the purpose specified.

3. rIhe log-retaining dogs r provided with adjusting-pins o and set-screws t, in combination with the log-carrier C, substantially as shown and described.

4. The combination of the knife-carrier E with the supporting-blocks u, the screws z x, and roller-nuts y, all constructed and arranged as and for the purpose specified.

5. rIhe divided log-carrier G, having the lugs f and iianges fi and groove g', in combination with the shaft f having the projections h', substantially as and for the purpose specied.

6. The clamping jaws b, provided with grooves to engage with aton gue on the breast ot' the knife-carriage, in combination with the knife a', clamping-screws o', and set-screws d', substantially as described.

IVitnesses: JOHN N. SEIB.

HUGH J. S'rocKFonD, J osnrn F. PAUL.

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