US796572A - Edge-dresser for lumber. - Google Patents

Description

UNITED STATES PATENT OFFICE.

JOHN F. FINNEGAN, OF IGERNA, CALIFORNIA, ASSIGNOR OF ONE-HALF TO LOWELL Y. OOGGINS, OF IGERNA, CALIFORNIA.

Specification of Letters Patent.

Patented Aug. 8, 1905.

Application filed March 3, 1904. Serial No. 196,411.

1'0 00M whom, it may concern.-

Be it known that 1, JOHN F. FINNEGAN, a citizen of the United States, residing at Igerna, in the county of Siskiyou and State of California, have invented certain new and useful Improvements in Edge-Dressers for Lumber, of which the following is a specification.

My invention relates to the sawing of lumber, and particularly to the sawing of boards into narrower lengths, strips, or pieces in the manufacture of box stuif, &c.

When the wide board leaves the sawmill, it has a rough edge, which is objectionable in this class of material; and the object of my invention is to provide effective means for dressing off this rough edge. Attempts have been made to accomplish this by combining with the gang of saws which produces the box stuff or similar material an edge-dressing saw; but as such saw is thin and elastic its employment has never been completely successful on account of the springing and chattering to which it is subject, particularly where there are hard knots in the edge. Instead of such a saw I place upon thegang-saw arbor a rigid disk having transverse blades or knives which dress the edge and give it a smooth surface.

The accompanying drawings will afford a clear illustration of an embodiment of my invention.

Figure 1 is an elevation of a saw-arbor with a gang of two saws and my edge-dressing disk in position. Fig. 2 is a side view of said disk. Fig. 3 is a broken side elevation showing a modification in the position of the dressingblades relatively to the disk which supports them.

The construction of gang-saws for sawing up boards into narrower lengths being well known and the means for supporting and feeding such boards to the saws being well known, I have not considered it necessary to illustrate these features, as they form no part of my invention. I have, however, shown a saw-arbor 1, supported in bearings 2 2 and having a drive-pulley 3. On this arbor are shown two saws 1 4:, which are illustrative of any number of such saws from one upwardly, according to circumstances. Secured upon the arbor is a rigid disk 5, having a reduced rim or flange 6 and a central perforated hub 7. The part 5 forms a smooth-surfaced offset from the disk and the hub 7 projects beyond it.

These parts are all cast solid, and in the manufacture I prefer to make solid blank disks with minimum-sized central openings, which openings can be enlarged according to various sizes of saw-arbors. Around the periphery of the rim 5 is shrunk a steel band or ring 8, and for additional security bolts 9 may pass through the external band and engage with the rim of the cast disk.

In the rim of the cast disk and extending through the same is a series of recesses, which are inclined relatively to the axis of the disk, and in these recesses and taking their inclination, as shown in Fig. 1, are knives, blades, or cutters 11, having chisel cutting edges, as shown. These blades are always inclined when looked at in plan view or front or rear elevation; but in side elevation they appear, preferably, as radial blades, as shown in Fig. 2. This is because a revolving radial blade acting against the edge of the board with a circular sweep makes a draw cut,'which is more effective than a straight cut.- I do not, however, limit myself to the radial arrangement of Fig. 2 and, in fact, have shown in Fig. 3 blades inclined to radii of the disk which can be employed, if desired. The blades project just enough beyond the part 5 to dress off the rough surface of the board,

and the plane flat surface of this part 5 forms an edge-guide for the lumber, while the hub forms a bottom rest for such lumber. As shown in Fig. 2, the periphery of the part 5 is beveled, as shown at 10, so that seats 14, which are co'ntinuations of said recesses, are formed in such bevel which help to hold the blades without obstructing any part of their cutting edges. The blades are of such length as to extend entirely through and beyond the rim in which they are seated, as shown in Fig. 1, so as to allow a considerable range of adjustment as they become worn. It is a simple matter to set the worn blades up into proper position from the rear, and such blades are easily removed for resharpening. To provide for this easy removal and replacement, the openings which receive the blades are made deep enough to receive keys 12, which bear on the blades between the latter and the exterior band 8. These keys are fixed against the outer edges of the blades by setscrews 13, which are threaded through the exterior band, bear against the keys, and are held by nuts 15.

In the operation of the de' vice the board is presented to the saw or saws in the usual manner. The blades revolving at the high speed of the saws and operating simultaneously with them dresses off the rough edge and leaves it smooth and suitable for use as box stuff or other material of that general character. The disk being perfectly rigid there is no tendency to buckle or spring, as in the case of av thin saw, and at the high speed of rotation the presence of knots in the edge forms no obstruction and interferes in no Way With the effectiveness of the device.

Having thus described ,my invention, What I claim, and desire to secure by Letters Patent, is-

1. An edge-dressing device comprising a disk having a central projecting hub adapted to form a bottom restfor the lumber,a smoothsurfaced ofiset forming an edge-guide for such lumber, and blades extending through the disk and slightly beyond the plane of said. ofiset.

2. An edgedressing device comprising a by seats are formed in said edge, and blades extending through the slots and seats.

In testimony whereof I have afiixed my signature, in presence of two Witnesses, this 4th day of January, 1904:.

JOHN F. FIN NEGAN.

Witnesses:

J. H. MURPHEY, H. C. WVHI LY.

Images