US2581475A - Jointer - Google Patents

Description

Jan. 8, 1952 J. N. FENNER Q 2,581,475

JOINTER Filed Dec. 7, 1946 3 Sheets-Sheet l MW a? Jan. 8, 1952 J. N. FENNER VJOINTER Filed Dec. 7, 1946 3 Sheets-Sheet 2 Jan. 8, 1952 J. N. FENNER 2,531,475

JOINTER Filed Dec. 7, 1946 5 Sheets-Sheet s @fiz 17f 2 2222267;

Patented Jan. 8, 1952 UNITED STATES PATENT OFFICE J OINTER John N. Fenner, AshevillaN. 0. Application December 7, 1946, Serial'No. 714,795

1 Claim.

Myinvention relates to a jointer, and it is an object of the same to provide a machine of that character that shall enable a small jointer to do work that has previously had to be performed on a much larger and more expensivemachine.

A principal object of the invention is to enable the user to effect a plane surface on a wide board with a small and narrow machine even though the surface of the original board is untrue.

Another object is to provide a jointer that shall be adaptedto perform a greater variety of work than has heretofore been done on a single machine.

Another object is to provide a jointer with ad justable means whereby the machine can be adapted for performing a variety of different operations.

Other objects and advantages of my improved machine will be understood upon consideration of this specification and of the attached drawwas which are made a part of this application for patent and in which similar reference characters indicate similar parts.

Referring to the drawings:

Fig. l is a plan view of my improved machine;

Fig. 2, a side elevation of the same;

Fig. 3, an end elevation;

Fig. 4, a perspective illustratingthe positions of parts for one mode of operation of the machine;

Figs. 5 and 6 are perspectives illustrating the steps in another mode of operation; and

Fig. '7, a perspective illustrating another mode of operation.

In the drawings, reference character indi- P cates a front work table from which the work is fed to a rear table I i these tables being spaced apart on a fixed frame 9 so as to permit the knives 2 on a cutter head l3 located between the tables transversely of the longitudinal axis of the tables to engage the work when the tables and the cutter head are appropriately positioned. The tables are adjustable up and down by means of adjusting wheels i4, 54 operating in well-known manner.

The cutter head is carried by a horizontal shaft I5 mounted in bearings It and IT on the frame 9, said bearings being located respectively at the right hand and left hand sides of the machine, and it is an important feature of my invention that the left hand bearing I! has been relocated a substantial distance to the left of the usual position on a lateral extension or bracket ll, so that the cutter head can be adjusted along the shaft IE to any desired position between the limits indicated respectively in Figs. 1 and 6.

The shaft :1 5 is shown as being driven by means of a pulley l8, thoughobviously any suitabledriving means may be employed.

In conventional jointers there is provided a side guard or fence 19 for positioning and guiding the right handedge of a board that is being planed, and a narrow rabbeting ledge is provided by an extension at the left hand side of the front table, said extension projecting rearward and laterally overthe left hand bearing. The fence at its front endhas a downwardly extending arm 20 with an arcuate slot'20 to receive a bolt 2| passing through a plate 22 that is slidable laterally in a slot at the end of table If), the bolt having a head at 23 in said slot,and the partsbeing clamped together by means of a nut 24 on the bolt. Thus the fence maybe tilted to desired position and-also moved to rightor left, andthen both adjustments may be fixed by means of the bolt.

In my improved device the rabbeting ledge is omitted, and the'table H is provided with a slot at 25 that is adapted to serve the same purpose as the slot at the opposite end of table l9, and whereby the fence may be supported at the left hand side of the tables and be tiltable and laterally adjustable as before, but at the left hand side of the tables.

In the use of the improved machine for the purpose of surfacing a wide board with a small machine, the cutter head is to be located directly between the tables In and H, as shown in Fig. 5. Then the front table is lowered according to the desired cut, the arrangement being such that the top plane of the rear table is tangent to the pe riphery of the cutting cylinder, and that the front table is below that plane to a distance corresponding to the desired depth of the cut. Now a board 26 is placed on the front table, the fence being in place at the right of the machine as indicated, and the board is fed across the machine, the front table and the fence serving as guides for the board. Thus a planed face is formed at the underside of the board just as in the case of an ordinary jointer, the face being as wide as the length of the cutter head.

Now for the second step, the cutter head is moved axially of the shaft I5, to the position shown in Fig. 6, or at the left hand side of the tables H), II. Then the front table is elevated until it is in the same plane as the rear table, both being tangent to the periphery of the cutting cylinder. Now the board 26 is placed on front table It, the thinner portion formed by the first step now resting on the table and the shoulder at 2'! bearing against the corresponding side edges of the tables and serving to guide the board and to cause a cut to be made that is just as wide and just as deep as the first cut and in the same geometric plane with it. Now the fence may be removed if the board is wider than the planed surface made by the two cuts, and any number of further cuts may be made in succession as called for by the width of the board.

My improved machine may be used advantageously in the rabbeting of a narrow board 21,

as illustrated in Fig. 4. Here the cutter head has been relocated so as to'space it from the fence 19 a distance corresponding to the width of board not to be rabbeted, and the fence is located at the right of the machine. of the rabbet will then equal the widthof the board less the distance from the fence to the near end of the cutter head. Then the'tables are both lowered until 1.,their planes are below the cutting cylinder to a distance equal to the desired depth of rabbet, and the board is fed across, the rabbet being formed in the part of theboard most remote from the fence.

For rabbeting a wide board 28, (Fig. 7) the fence is secured to the left hand side of the machine and the cutter head is adjusted so as to project only far enough past the fence to form a rabbet ofdesired width at the adjacent edge of the board. The tables are both lowered below a plane tangent to the cutting cylinder sufficiently to give the desired depth of cut, and the board is fed over the tables as supporting means, the board being guided at one side by the fence. This method is necessary only if the board is too wide to be rabbeted according to the method of Fig. 4.

The term cutting cylinder is used herein asindicating that surface of revolution generated by the cutting edge of' a knife, as an element, during the rotation of the cutter head on its axis.

It will be obvious to those skilled in the art The Width I that the methods and apparatus herein disclosed may be varied, all without departing from the spirit of the invention; and therefore, I do not limit myself to what is shown in the drawings and described in the specification, but only as indicated in the appended claims. As an example of such a variation, the fence supporting means may be carried directly by the base of the machine instead of by the tables. 7.

I claim:

A jointer comprising spaced tables, a rotary cutter head between said tables, one of said tables having a transverse slot across its outer end, a block slidable in said slot, a fence at one side of the table, said fence having an arcuate slot, and a bolt on said block passing through said slot for supporting said fence on said block,

iii.

whereby tightening of a nut on the bolt will clamp the fence against either transverse movement or tilting movement.

JOHN N. FENN'ER.

REFERENCES CITED The following references are of recordin the file of'this patent:

UNITED STATES PATENTS

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