US1791335A - Jointer and attachment therefor - Google Patents

Description

Feb. 3, 1931. A. WALLJSCH ET AL 1,791,335

JOINTER AND ATTACHMENT THEREFOR Filed March 28. 1929 2 Sheets-Sheet 1 E -"E (:3 (:3: 5 i FLIY "J I 25 i 'Q/ Hi hway Zia w w 1931- L. A. WALLISCH ET AL 1,791,335

JOINTER AND ATTACHMENT THEREFOR Filed March 28. 1929 2 Sheets-Sheet 2 INVENTOR5 BRIEF m H E. LIIHHI IL Hun. kwmw .QMJ NW mm 5 N lmmnni m mw X H u %N 1 u nN Q m v gwfi mm w Mm. wm w Patented Feb. 3, 1931' UNITED STATES PATENT OFFICE- LAWBENCE .A. WALLISCH AND BRUCE U. HILL, F PITTSBURGH, PENN SYLVANIA JOIN'IER AND ATTACHMENT THEREFOR,

Application filed March 28, 1929. Serial No. 350,552.

This invention relates to machines commonly known as jointers or planers for planing the flat surfaces of boards and the like, and also to'attachments for such machines.

The invention further relates to means whereby the fiat surface of a board may be planed unevenly, that is in such a manner that the portion planed off is of non-uniform thickness.

J ointers or planers are well known machines. They comprise essentially a table for supporting and guiding a board to be planed and a rotating knife cooperating with the table for planing the board as itis advanced with respect to the table. These machines are commonly constructed so that the rotating knife is permanently journaledwith its axis parallel to the surface of the table so that when a board is laid flat on the table and fed to the knife a portion of uniform thickness will be planed off.

One of the purposes of this invention is to provide an attachment which may be easily applied to a .jointer or planer whereby a portion of non uniform thickness may be planed off of a board. Inorder to plane off a portion of non-uniform thickness, it is necessary that the board be fed to the knife at an angle to the axis of the knife. Various attempts have been made to provide for accomplishing'this purpose but none has been fully satisfactory.

We provide in combination with a jointer having the usual table and planing knife,

means for holding and guiding above the table and spacing therefrom an edge of a board tobe planed, whereby the portion removed in planing is of non-uniform thickthickness. Further objects and advantages of the invention will become apparent as the following description of a present preferred embodiment thereof proceeds,

In the accompanying drawings we have tion removed in planing is of non-uniform shown a present preferred embodimentof the invention, wherein p Figure 1 is a fragmentary elevation of a jointer having our attachment applied thereto, I

Figure 2 is an elevation to enlarged scale of a portion of the apparatus shown in Figure 1, v I Figure 3 is a side elevation of our attachment, 7

Figure 4 is a top plan view of the attach ment shown in Figure 3, r V Figure 5 is a vertical cross section taken along the line VV of Figure 3,

Figure 6 is a fragmentary detail elevation showing portions of a j ointer withour attachment applied thereto,

Figure 7 is a view similar to Figure 1 showing a modified type of jointer,

Figure 8 is aview similar to Figure 2' of 7 the modified type of jointer shown in Figure 7, and v Figure 9 is a detail elevation to enlarged scale of a portion of the apparatus shown in Figures 7 and 8. I i V 'Re ferring more particularly to the drawings, reference numeral 2 designates the bed of a ointer or planer to which are adjustably connected a pair of oppositely disposed tables 3 and 4. The tables 3 and 4 normally have their upper surfaces at approximately the same height and substantially horizontal. They are hollowed out at 5 and 6 respectively to provide space between them for a rotatable knife 7 having blades 8 and 9 mounted .85 upon a shaft 10. The knife shaft 10 is permanently journaled in the frame of the jointer and is substantially horizontal and parallel to the tops of the respective tables 3 and 4 when in their normal positions.

As shown for example in Figure 1, the knife 7 is adapted to rotate in a clockwise direction so that boards fed to it to be planed must be fed from the right hand side viewing such figure. Normally when a portion of uniform thickness is to be planed off of the boards they, are laid flat uponthe top of the table 3 and pushed into the knife 7 whereby such a portion is taken off as the knife rotates.

The thickness of the portion to be removed 10o may be cont-rolled by adjusting the height of the table 3 with respect to the knife. This may be done by turning the hand wheel 11 which cooperates with the inclined surfaces 12 to raise and lower the table. The table 1 is also shown provided with a hand wheel 13 cooperating with inclined planes 14 whereby its height may be adjusted, although adjustment of the table on the discharge side of the knife is relatively less important than adjustment of the table on the feed side of the knife.

Connected to and supported by the table f through standards 15 is the usual guide or fence 16, against which the side edges of boards to be planed are placed in order to provide for guiding the boards to the knife. As above pointed out, adjustment of the table on the discharge side of the knife is relatively unimportant and for most practical purposes this table is seldom adjusted. The guide or fence 16 being connected to the table a is therefore normally in a fixed position. A portion of it, however, extends beyond the knife and over the table 3, thus providing for continuous guiding of a board as it. is fed through the knife.

Everything which has been described above is old and well known. V2 e shall now describe the application of our invention to a jointer or planer of the type which has been explained.

The attachment is designated generally by reference numeral 17 and comprises a frame 18 preferably of aluminum and having portions removed to provide holes 19 whereby the weight of the attachment is reduced, and also having strengthening ribs 20. Formed integrally with the frame 18 at its upper portion are lugs 21 extending generally at right angles to the frame and having downwardly extending extremities 22. Threaded through the lugs are adjusting screws 23 provided with suitable adjusting nuts 24-, as shown in Figures 3, 4 and 5.

As shown in Figure 3, the bottom of the attachment 17 is not a continuous plane surface, but has a portion of its length in the form of a plane, the remainder being at a higher level tl an such portion. Screwed to the first mentioned portion of the lower surface of the attachment 1'? is a thin metal strip 25 which, as shown in Figure 4, extends past the face of the attachment a substantial distance. The strip 25 is preferably as thin as practicable, while still capable of performing its function.

The attachment is attached to the jointer or planer by placing the lugs 21 over the top of the guide or fence 16, the body of the attachment bein disposed inwardly with respect to the guide so that the strip 25 projects over the table 3. The height and level of the attachment is controlled by the screws 23 and locking nuts 24 so that, once adjusted, it will maintain a fixed position with respect to the guide 16. As shown in Figure 1, the strip 25 which overlies the table 3 terminates just short of the knife 7, although the extremity of the attachment extends past the knife and over the table d.

In the use of the attachment a board is laid over the table 3 with one side edge resting on the strip 25 of the attachment and the opposite side edge resting on the top of the table, and the board as thus supported and guided is fed to the knife whereby a portion of non-uniform thickness will be planed off. The angularity of the board with respect to the table may be controllel by raising or lowering the attachment by means of the adjusting screws, but normally it is controlled by raising and lowering the table 3, the attachment remaining stationary by reason of its being connected with the guide 16, which in turn is connected with tie relatively stationary table 4. The thickness of the portion to be removed may also be controlled by raising and lowering the table 3, although of course the thicl-zness is limited by the construction of the knife blades. The attachment is provided with a laterally extending lug 26 adapted to contact with the end of the guide 16 to maintain the attachment in adjusted position longitudinally of the j ointer.

Whereas the guide 16 shown in Figures 1 and 2 is connected with the relatively stationary table, certain types of jointers are manufactured which have the guide connected with the relatively movable table, that is, the table on the feed side of the knife. l v hen a ointer of this type used the guide of course is raised and lowered with the table, and the attachment being supported by the guide is also raised and lowered with the table. Therefore raising and lowering. of the table on the feed side of the knife will not affect the angularity of the board to be planed with respect to the surface of he table,v but will affect the thickness of the strip to be planed off. in order to facilitate adjust ment of the attachment to alter the an.

.aritv of the board with respect to the table, we provide means adapted to be quickly adjusted so that in raising and lowering the attachment it will not be necessary to turn the adjusting screws and nuts. This embodiment of the invention is shown in Figures 7, 8 and 9 and will now be described.

to those of the embodiment of Figures 1 am. 2. Disposed between the tables is a rotatable knife 30 adapted to rotate in a clockwise direction, so that the table the relatively adjustable table which when raised and lowered controls tie thickness of the portion to be planed off of the board. A guide 3i is connected with the table 28 and moves up and down therewith. An attachment 32 is provided which is substantially the same as the attachment 17, shown in Figures 3, 4 and 5, except that it is provided with an upward extension, 33, to which is pivoted at 34: a lever 35, to the opposite end of which is connected at 36 a pair of links 37. Pivoted to the links 37 are cams 38, the lower surfaces of which are substantially horizontal, and the upper surfaces tapered with respect to the hori Zontal but in the same direction. The cams 38 are adapted to ride on the upper surface 39 of the guide 31, being adapted for movement therealong by operation of the lever 35.

The attachment 32 is provided with lugs l0 having associated therewith adjusting screws 40 provided with adjusting nuts 40'. The ends of the adjusting screws 40 are adapted to lie on the respective cams 38 so that upon movement of the lever 35 the attachment 32 will be raised or lowered. The extension 33 of the attachment is provided with holes 41 into which a spring actuated retaining pin 42 on the lever 35 is adapted to pass to hold the lever in desired adjusted positions. Thus the attachment 32 may by simple movement of the lever 35 be raised and lowered with respect to the table 28, and by means of the pin 42 and the holes l1 may be locked in desired position.

By the use of our invention a board may readily be planed at a desired angle so that a portion of non-uniform thickness may be removed. The attachment is light in weight and of simple and strong construction, and may be very easily applied to a jointer or planer by simply placing it over the guide or fence and performing the necessary adjustments. To remove the attachment it is merely necessary to lift it off, it not being necessary to remove any bolts,screws, or other fastening means. It may therefore be said to be capable of being applied and removed in an instant, thereby'resulting in the saving of time and labor.

While we have shown and described certain present preferred embodiments of the invention, it is to be distinctly understood that the same is not limited thereto, but may be otherwise variously embodied within the scope of the following claims.

We claim: 7

1. In a jointer, a table, a knife, a board guide, and means depending from the board guide for holding and guiding above the table and spaced therefrom an edge of a board to be planed, whereby the portion removed in planing is of non-uniform thickness.

2. In a jointer, a table, a knife, an upstanding member extending above the table, and means adjustably connected with the upstanding member for varying with respect to the table the inclination of a board to be planed, whereby the portion removed in planing is of non-uniform thickness.

3. In a jointer, a table, a knife and means resting upon an upwardly facing surface connected with the table for supporting and guiding above the table'a board to be planed, said means being adjustable to vary the angle at which the board is fed to the knife, whereby the portion removed'in planing is of nonuniform thickness.

4. In a jointer, a table, a knife, and means connected with the table for supporting and guiding a board to be planed, such means comprising a separate member adapted to be spaced from and out of contact with the table proper and underlie an edge of the board.

5. In a j ointer, a table, a knife, and means connected with the table and comprising a strip of negligible thickness adapted to underlie an edge of a board to be planed, such means being adjustable with respect to the table.

6. In a jointer, a table provided with the usual board guide, a knife, and means connected with the guide and having a depending portion adapted to underlie an edge of a board to be planed.

7. In a jointer, a table provided with the usual board guide, a knife, and means connected with. the guide and having a vertically adjustable depending strip adapted to underlie an edge of a board to be planed.

8. In a jointer, a table provided with a board guide, a knife, means connected with the guide for varying the angle at which a board is fed to the knife, and cam means for adjusting the first mentioned means with respect to the guide. I

9. In a jointer, a table provided with, a board guide, a knife, means connected with the guide and supported from the top thereof forv varying the angularity of a board to be planed with respect to the table, and slid able cam and lever means for adjusting the height of the first mentioned means.

10. In a ointer, a table, a knife, an attachment therefor adapted for controlling the angle at which a board to be planed is fed to the knife, and slidable cam and lever means interposed between the attachment and a portion of the table for adjusting the position of the attachment with respect to the table.

11. An attachment for a jointer, comprising a frame, and means connected therewith extending laterally from the attachment for underlying an edge of a board to be planed, whereby the portion removed in planing is of non-uniform thickness.

12. An attachment for a jointer, comprising a frame, means thereon for connecting the attachment to the jointer, and a stripextending laterally from the attachment adapted to underlie an edge of a board to be planed.

13. An attachment for a jointer, eompris ing a frame, means thereon for connecting the attachment to the jointer, and dependingmeans including a thin portion adapted to lie between a portion of a board to be planed and the table of the ointer.

14:. An attachment for a jointer, comprising a irame, a thin strip connected therewith for controlling the angnlarity of a board to be planed With respect to the table of the jointer, means for attaching the attachment to the jointer, and cam means for quickly adjusting the position of the attachment.

15. An attachment for a jointer, comprising a frame, means connected therewith for controlling the angularity of a board to be planed on the jointer a lever pivoted to the attachment, and cain means operable by the lever for adjusting the position of the at taehment.

In testimony whereof We have hereunto set our hands.

LAlVRENCE A. WALLISCH. BRUCE U. HILL.

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