US918651A - Veneer-cutting machine. - Google Patents

Description

N. E. BROWN, nsc'm; E. W. BROWN, E. 1T. HATCH & W. M. BROWN, EXBOUTOEB.

VENEER GUTTING MACHINE. APPLI OATION FILED 001. 17, 190B.

I nted Apr. 20, 1909, s H y 2BHBET8-SBBBT 1.

' I Emma i'mizlfimm Wuhan: a

' 'onrrnnsrar ES PATENT OFFIQE.

NORMAN E. BROWN, OF ST. JOSEPH, MICHIGAN; EDWARD W. BROWN, EDWARD N. HATCH,

AND WILLIAM M. BROWN, EXECUTORS OF SAID NORMAN E. BROWN, DECEASED, ASSIGN- ORS TO ST. JOSEPH IRON WORKS, OF ST. JOSEPH, MICHIGAN.

VENEER-CUTTING- MACHINE.

Specification of Letters Patent.

Patented April 20, 1909.

Application filed October 17, 1908. Serial No. 458,259.

To all whom it may concern:

Be it known that I, NORMAN E. BROWN, a citizen of the United States, residing at St. Joseph, in the county of Berrien and State of Michigan, have invented a new and useful Veneer-Cutting Machine, of which the following is a specification.

This invention relates to veneer cutting machines of that general type shown in United States Letters Patent granted to me on October 23, 1894, under No. 528,120. In machines of this type a pressure bar is employed to bear against the log immediately in 7 advance of the veneer cutting knife, and dur ing the operation of the machine it often becomes necessary to move the pressure bar away from the log of wood for the purpose of removing slivers and it is, also, necessary to move the pressure bar away when it is desired to sharpen the knife. In large machines it is diflicult to tilt the pressure bar back without first relieving the pressure, and allowing the knife to run out of the cut, and this requires considerable time and is wastefu The principal object of the present invention is to provide means whereby the pressure bar may be withdrawn back out of contact with the log before the tiltingoperation, so that the bar may be moved away from the wood without disturbing the position of the knives. p

A further object of the invention is to provide a pressure bar mounting of such nature that the bar will be moved in the direction of its width during the tilting movement in both directions. 7

With these and other objects in view, as will more fully hereinafter a pear, the invention consists in certain novel features of construction and arrangement of parts, hereinafter fully described, illustrated in the accompanying drawings, and particularly pointed out in the appended claims, it being understood that various changes in the form, proportions, size and minor details of the structure may be made without departing from the spirit or sacrificing any of the advantages of the invention' In the accom anyingdrawingsz-Figure 1 is a sectional e evation of a veneer cutting machine constructed in accordance with the invention, showing the presser bar in active position. Fig. 2 is a sectional view showing the pressure bar withdrawn. Fig. 3 is a front elevation of one end of the machine. Fig. 4 is a perspective view showing the several parts of the bar actuating mechanism, detached. 7

Similar numerals of reference are employed to indicate corresponding parts throughout the several figures of the drawings.

The main frame of the machine comprises a sole plate 10 and end standards or cheek plates 11. The cheek plates are provided with circular openings forming bearings for the reception of sleeves 12 in which are journaled the trunnions 13 of the pressure bar carrier 14. The trunnions 13 are disposed eccentrically to the axes of the sleeves 12, so

. that by rotating the latter the trunnions may be moved toward and from the work. The

carrier 14 supports a pressure bar 15 and the latter is held in place by clamping bolts of the ordinary type, and when necessary the ordinary slitting cutters may be employed for the purpose of trimming or dividing the veneer.

Secured to or formed integral with the outer end of each of the sleeves 12 is a disk 16, and provision is made for rotating said disk for the purpose of moving the pressure bar toward and away from the work during the tilting operation.

At the opposite ends of the carrier 14 are upright arms 18 in which is journaled a horizontally disposed shaft 20, and to one end of this shaft is secured a tilting lever 21. This lever is provided with two arms 22 and 23 which are disposed approximately at a right angle to the lever 21. The arm 22 of the lever is connected by a link 24 to a crank pin 25 on the disk 16, so that when the lever comes into engagement with the periphery of the disk the movement of the operating handle is continued in the same direction and the arms 18 and shaft 20 are thrown over from the position shown in Fig. 1 to that indicated in Fig. 2 with the eccentric sleeve 12 as an axis of rotation and the carrier 14 is tilted backward in order to permit free access to the cutting blade. Movement in the opposite direction is controlled by the pin extending from the standard and arranged to be engaged by a lip 31 projecting from the periphery of the disk.

The mechanism thus far described is arranged at each end of the machine, with the exception that only one operating lever 21 is secured to the rocker shaft 20, and in operation the lever 21 may be moved from the position shown in Fig. 1 to that indicated in Fig. 2, and in so moving the two sleeves 12 will be rotated and will carry the two trunnions 13 through an arc of approximately so that the pressure bar will be withdrawn from the work and the knife will be clear for the purpose of removing slivers or when it becomes necessary to resharpen or adjust the knife proper. The stop pins 30 are so located that the pressure bar will move back to the exact position after each tilting operation, so that minor adjustment of the parts are wholly unnecessary.

What is claimed is 1. In a veneer cutting machine, a pressure bar, a pressure bar carrier having end trunnions, revoluble bearing sleeves in which said trunnions are eccentrically mounted, a shaft supported by the carrier parallel with the axis of rotation of the latter, an operating lever carried by the shaft, and means for connecting the shaft to the sleeves to thereby rotate the latter first independent of and then with the carrier.

2. In a veneer cutting machine, a frame, a

pressure bar, a pressure bar carrier having end trunnions, sleeves mounted in bearing openings in. the frame and in which said trunnions are eccentrically mounted, arms on said carrier, a shaft ournaled in said arms, an operating member on the shaft, means for connecting the shaft to the sleeves to rotate the latter independently of the carrier, and means for limiting the movement of the sleeves independently of the shaft to permit bodily tilting of the carrier and the shaft.

3. In a veneer cutting machine, a pressure bar, a pressure bar carrier, trunnions arranged at the ends of the carrier, a pair of sleeves having eccentrically disposed bearing openings for said trunnions, disks secured to said sleeves, frame members in which the sleeves are mounted, a shaft-ournaled inthe carrier, levers carried by said shaft,links connecting the levers to the disks, and means for limiting the movement of said disks.

4. In a veneer cutting machine, a pressure bar having end trunnions, sleeves having eecentrieally disposed openings for the reeeption of the trunnions, frame members forming bearings for the sleeves, disks secured to said sleeves, a shaft journaled in the carrier, two armed levers carried by said shaft, links CO11- neeting one arm of each lever to the disks, and an adjustable stop carried by the second arm of each lever and arranged to engage the periphery of said disk.

In testimony that I claim the foregoing as my own, I have hereto affixed my signature in the presence of two witnesses.

NORA AN I). BROWN Witnesses:

GEo. F. Ham LAWRENCE C. FYEE.

all)

Images