US1216340A - Portable veneer-trimmer. - Google Patents

Description

C. L. MATTISON. PORTABLE VENEER TRIMMER. APPUCATION FILED NOV. 2. 1914.

Patented Feb. 20, 1917.

2 SHEETSSHEET l IiZV6/Z'ef07'.

2 SHEETS C. L. MATTISON. PORTABLE VENEER TRIMMER. ,APPLICATION FILED NOV 2. 1914.

' draw-knife.

outrun srarrias rnrnr CARL LAWRENUE MAEETISUN, F BELOIl, WISCONSIN, ASSIGNOR T0 0. MATTISQH MACHINE WORKS, Q]? BELOIT, WISCONSIN, A CORPORATION QF WISCONSIN.

PGBTABLE VENEER-TRIMMER.

terns-ire.

Specification of Letters Eatent.

Application filed November 2, 1914. Serial No. 869,743.

Yb all whom it may concern:

llc it known that l, CARL LAWRENCE MAT- rison, a citizen. of the United States, residing at Beloit, inthe county of Rock and State of Wisconsin, have invented certain new and useful improvements in Portable Veneer-Trimmers, of which the following is a specification.

In the manufacture of desks, tables and other articles of furniture, it is common to secure a strip of veneer to the vertical edge of the top piece so present a more pleasing grain of the wood. The strip of veneer used for this purpose is wider than the thickness of the top piece so. that the upper edge of the veneer projects above the upper face of the top and must be removed after the glue has set. Heretotore this projecting upper edge has been removed in various ways by hand, probably the most common way being to cut oil the edge with a Obviously this operation is a tedious and slow one and furthermore great care must be taken to prevent splitting of the grain of the veneer down below the face of the table during the cutting operation.

The object of my invention is to produce a simple and eilective machine tool for trimming off this veneer edge quickly and evenly "and without any liability of splitting the veneer.

The invention also refers to certain details of construction which will be fully described hereinafter.

in the acconu ianying drawings, Figure 1 is a perspective view illustrating in use a veneer trimmer embodying the features of my invention, the wires for supplying electric power to the motor being omitted. Fig. 2 a top plan view of the machine. Fig. 3 is a horizontal section through the lower portion of the machine, substantially in the plane of line 3-3 of Fig. 5. Fig. 4 is a side elevation, and 5 is an enlarged vertical central section through the machine.

In the preferred embodiment illustrated in the drawings, the machine comprises housing consisting of a lower or base section constituting a support or gage, and

anupper section 11, the latter constituting the casing of an electric motor, and being threaded into the base section 10.

The motor casing 11 may consist of two sections suitably secured together. by bolts 12. The armature shalt is indicated at 13,

'ing.

the armature, commutator and brushes being indicated in dotted lines by numerals 14, 15 and. 16, respectively. These motor parts may be of any common or preferred construction, and for-the sake of clearness the field has been entirely omitted from the drawings.

The shaftl3 is supported in ball bearings which, in the preferred form herein shown, comprise inn'er and outer rings 17 and 18 between which are anti-friction balls 19. The inner, rings are fixed upon the shaft 13, while the outer rings are fixedly seated in hollow bosses 20 and 21 on the upper and lower ends of the casing 11. On the upper end of the shaft 13 is fixed a washer 22 and nut 23 abutting against the upper ball bear- T he open end of the upper boss 20 is closed by a suitable plug 24- to exclude dust and other foreign matter.

Upon the lower end of the armature shaft 13 beneath the lower ball bearing, is rigidly fixed a head 25, and to theunderside of this head is secured a circular saw 26. Preferably, the saw'is secured tothe head by a suitable np mber of countersunk screws 27, so that the saw may be easily removed for sharpening when desired. The upper end of the head25 shuts against the lower ball bearing, so that saidhead and the nut and washer 22 23 effectively preveht endwise movement of the armature shaft, the saw thus being held against vibration.

The machine is arranged to be carried from place to place by a suitable handle 28 which is secured in this instance to the base section 10. A set screw 29 (Fig. 2) threaded in the base section is arranged to lock the sections 10 and 11 against relativerotetion when tightened up. Preferably, a block of fiber or other suitable material (not shown) is placed at the inner end of the set screw to bear against the thread on the casing 11, so as to prevent injury to the latter.

The screwthread connection between the base section 10 and the'motor casing 11 is provided for the purpose oi? obtaining an ad justment between the lower edge of the base and the face of the saw. Such adjustment may be necessary either in original assembly or when the saw is replaced after sharpening or for other purposes. To make the adjustment the set screw 29 is loosened, the sections 10 and 11 are given a relatively rotary movement to the desired extent, and

IN a

the set screw is again tightened to lock the sections together.

The base 10 is reduced in size at the-lefthand side of the handle 2-8, as seen most tearly in Fig. 3, being of less diameter at this place so that the edge of the saw 26 projects beyond the base, the latter having its lower edge cut away for this purpose. The base fits relatively close to the edge of the saw, and also close to the upper face thereof, so as to prevent splinters or the like from being carried into the interior of the casing by the saw. The wall of this recess or reduced portion may be held in contact with the veneer edge so that, if desired, the veneer edgelmay serve as a guide for the machine in moving along the work. See Fig. 3.

In use, the machine is placed upon the upper face of the table top A-lor other article of furniture, the Weight of tlie machine resting upon the lower edge of the base 10. This lower edge provides a largebearing surface for the machine, which extends continuously around the larger portion of the base, so that a steady rest for; the machine will be supplied, even if the piece of work on which the machine resting be a narrow or irregnlar strip or the like, instead of a broad tab top. The machine is moved to carry the projecting edge of the saw against the veneer B and is pushed along the table entirely around the perimeter thereof. At the corners of the table the sawed off veneer edge will bow outwardly sufliciently to permit the machine to be ,-mo\ ed up into the corner so that the veneer at the corners may be trimmed as effectively as at the sides of the table.

It will be seen that this machine is very effective for veneer trimming, since it does its work quickly, accurately and evenly and has no tendency to splitthe veneer. Furthermore, since it is the machine on the table and push it along, 'tl'ieoperation does not require an experienced workman, but may be performed by cheap labor.' M

While I have herein shown the preferred embodiment-of my invention, I recognize that variousImodifications may be resorted to without departing from the spirit and scope thereof, and. I therefore do not limit myself to the details of construction shown in the drawings, except as defined by the terms of the appended claims.

I claim as my invention:

1. A portable veneer trimming tool comprising a support or gage :ulapted to rest against the face of the work to stabilize the tool, a saw-carried by said support in position to lie approximainly parallel with and very close to the said [ace of the work when.

the face of only necessary to set' emme the support or gage is in engagement therewith, and means for driving said saw.

2. A device of the character described comprislng a lower or base section constituting a support or gage, an upper section adustably mounted on the lower section and constituting the casing of a motor, the motor having a drive shaft, and a c rcular saw closed by said base and operatively con- 3'0 neat d. to said motor, the saw occupyin a podi ion parallel with and close to the said face of,the article of furniture when said base is in engagement therewith.

4. A device of the character described comprising a motor, a hollow base threaded upon said motor and having a cutaway portion, and a rotary circular saw operatively connected to the motor and inclosed by said base and adapted to project through said cut away portion, the saw occupying a plane parallel with and close to the face of an object with which said base is in'engagement.

5. A device of the character described comprising a hollow base having an'arcu 06 ate lower edge adapted to rest upon the work and havinga cut away portion, a motor comprising a casing threaded into said base andcomprising a shaft, and a rotary circular saw rigidly fixed on the lower end of said shaft and projecting through the cut away portion of said base, said saw lying in approximately the same plane as the said arcuate lower edge of the base.

ing edge of veneer, a hollow base having-a lower edge arranged to bear. a ainst the worlgdriving means on the base, and a rotary circular cutting element within the base operatively connected to and lying in a plane close to said lower edge of the base, the latter having reduced portion at one side thereof and having' its lower edge below said reduced portion ,cut

6. In a tool" for trimming off tlir projcc'b away to expose an arc of the cutting element, the edge of the cut-awav portion lying close to the periphery and the upper face of the cutting element.

in testimony whereof, l. hereunto set my hand in the pres'ecnce of two witnesses.

CARL LAWRENCE MiAflllllrlUN. ln theprcsonco of-- i J. W. Downtmo, l M, .llusn.

base having an 75 said driving means 1 0

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