US1567865A - Woodworking machine - Google Patents

Description

Dec. .29, 1925- W. N. SAWYER WOODWORKING MACHINE Filed August a, 1924 4 sheets-sheet 1 ATTORNEY llllllllllllll 1924 4 Sheets-Sheet 3 46 5a 48 INVENTOR 12 omw dl. 1!

BY m: .P 9: L4 ATTORNEY Dec.'29 1925- W. N. SAWYER WOODWORKING MACHINE Filed August 8 W. N. SAWYER WOODWORKING MACHINE Filed August 8,

1924 4 Sheets-Sheet 4 A TTORNE Y Dec. 29, 1925- Patented Dec. 29 1925- UNITED srarss PATENT oF Ic WILLARD N. SAWYEB, OF WINCHENDON, MASSACHUSETTS, ASSIGNOR TO BAXTER D.

WHITNEY ,& SON, INC., OF \VINCHENDON, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

WOODWORKING MACHINE.

Application filed August 8, 1924- Serial' No. 730,803.

To all whom it may concern:

Be it known that I, WILLARD N. SA WYER, a citizen of the United States, residing at ,VVinchendon, in thecounty of Vorcester and State of Massachusetts, have invented an Improvement in Woodworking Machines, of which the following description, in connection with the accompanying drawings, is

a specification, like characters on the draw-' configuration, and is then moved into engagement with the cutter and is advanced relative to the cutter while the pattern engages a pattern guide.

The present invention relates to various improvements in this type of machine by which the work may be readily presented to and removed from the cutter, and by which the work is held firmly in place during the cutting operation and is advanced relative to the cutter by power-operated means.

One important feature of the present invention resides in an element supported near the cutter and adapted to exert a substantial downward pressure upon the work and pattern to maintain the Work in firm en-J gagement with the pattern,and which pre-; vents the work from lifting up-under the ction of the cutter.

Another feature of the invention resides in means for moving the work to the opera tive posltion and for holding the work firmly in place against the cutter during the cutting operation, and inpower operated means for feedlng the work relative tothe cutter.

Anotherfeature of the invention resides in novel means for rotating the work rela- 1 tive to the cutter and which is constructed Ano f a ure of t e in ention r i e 1 1' foot controlled means for facilitating removal of the work from the cutter, and in latch means for automatically holding the parts in the inactive position while one piece of work is being removed from the machine and another piece is being placed on the machine.

Other features of the invention and novel combination of parts in addition to the above will be hereinafter described in connection with the accompanying. drawings, which illustrate one good practical form thereof. i

In the drawings 7 Fig. 1 is a perspective view of a Woodworking machine embodying the features of the present invention.

Fig. 2 is a side view of the machine of Fig. 1 with the table and associated parts shown in section and disclosing therotating cutter at the right hand side of the machine.

Fig. 3 is an enlarged top plan view of Fig. 1 showing the cutters in operation upon different types of work. I

Fig. 4i is an enlarged sectional view of parts shown in F? g. 2. p

Fig. 5 is a plan view of a portionrof the machine of Fig. 1 provided with a different construction for rotating the pattern relative to the cutter, the pattern and work being omitted.

Fig. 6 is a vertical sectional view taken on line 66 of Fig. 5 with the work in place, and; p a

Fig. 7 is a plan view of aportion of th machine of Fig. 1, provided with still an-,

other construction for rotating the pattern and work. 1

The machine of the present invention is designed to cut edges and marginal portions of the work, in conformity with any desired pattern, and in Fig. 1 one cutter is shown as operating upon the outer edge of a. toilet seat to give the same the desired configuration, while the work has been removed.

from the other cutter to show the means of engagement with the cutter, and in Fig. 3

one the cutters shown as operating upon,

the toilet seat of Fig. 1, and the other cutter is shown as operating upon the cover of a toilet seat. It will be understood, however, that the present machine will operate sat-isfactorily upon straight or curved surfaces, as well as the substantially circular work shown.

The wood working machine illustrated is provided with a supporting frame, consisting of a base 10 having an upwardly extending column 11, at the upper end of which is provided the work supporting table 12. The present machine, as usual, is provided with two different cutter units, one of which rotates its cutter in a right-hand direction, and the other rotates its cutter in a left-handidirection, to'avoid operation of a cuttenagainstthegrain of the wood, and it is'custom ary to present ODCSiLlQIOf apieceof work to a cutter rotatinginone direction andthe other side of' the work to a cutter rotating in the. oppos te direction, thereby avoiding the operation of a cutter against the grainofthe wood. This is not always necessary, however, because, if the cutter is driven at a high speed and the work is-fed smoothlyfand gradually towards the cutter, the cutting operation will be performed properly, irrespective of the direction in which the grain runs. The cutter units and means for operating the same may be similar, except that,.as above stated, one cutter is rotated in a. right-handi direction and the I other. in a leftehand direction In the embodiment of the invention illustrated, it is assumed that the cutter 13 isrotated: in a clockwise direction. This cutter is rigidly secured'bymeans of a nut 14; to; a verticaloperating. shaft 15, which shaft extends upwardly thru an opening in the table 12, and the'shaft 15 is conven iently driven by an electric'motortls, mountedfor vertical sliding movement upon slideways 17. It is desirable to provide means for raising and lowering the-shaft 15 so that the cutter may be raised or lowered to accommodate differei'it work upon the table'lQ, and to this end, in the present case, the motor casing is provided with a laterally extending lug 18 having a threaded opening adapted to receive the threaded shaft 19 jo'urnaledin a bearing 20 supported by the machine frame. This threaded shaft may be rotated by a hand wheel 2t rigidly secured to a laterally extending shaft-22 and rotative movementis impartedv from the shaft 22 to the threaded shaft 19 by bevel gears enclosed within the casing 23. The arrangement is such that the hand wheel 21 may be rotated in one direction to operate thethreaded shaft so that it will raise the cutter 13, and in an opposite direction to lower this cutter.

It is assumed that the second cutter 24 is rotated in a contra-clockwise direction and this cutter is rigidly secured to a vertical shaft 25 which extends upwardly thru an opening in the table 12 and is rotated by an electric motor 26 similar to the shaft 15, and the cutter 24: may be raised or lowered by a threaded shaft 27 which may be rotated by the hand wheel 28, similar to the manner in which the threaded shaft 19 is rotated.

In Fig. 1 of the drawing, the cutter 24 is shown as operating upon a toilet seat 29 which is rigidly secured to a pattern 30, the outer edge of which has the configurations it is desired to impart to the work 29. The work may be secured to the pattern 30 by various means, and, in the present case, this is accomplished by a bridge bar 31 mounted upon a stem extendingupwardly from thepatternBO, and the upper end of this stem is provided with any desired form ofclamping. means 33.

The presentinvention contemplates mechanism for moving the workiinto the cutterengaging position, and, in the present case, this-is accomplished by means of a slide 34 mounted in a slot 35 formed'in the table 12for movement towardsand from the cutter-operating shaft 15, it being understood that a similar slide 34tandoperatingsmeans for the. same is provided adjacent the cutter 24. Each slide is urged toward its cutter by a cable 36 the inner end of which is secured to a post 37 projecting downwardlyfrom the under face of the slide (see 2), and the cable passes about one pulley 38 that rotates in a horizontal plane and about a second pulley 39 that rotates in a vertical plane, andzthe downwardly extending portion of the cable 36 is provided with one or more weights 10.

The pattern 30 is shown as having a relatively large central opening siu'rounded by the inner wall ill and the slide adjacent the cutter 13 is provided with a transversely extendinglu'idge 42 secured to the slide by a. bolt 43, and upon the upper face of the bridge 4-2 are mounted the spaced rollers l journaled upon the upstanding; posts The. arrangement is such that the rollers t'engage the inner curved face 1-1. of the pattern at spaced points and act uponthe pattern to move it and the work 29 towardsthe cutter. It is apparent that a single roller might be provided in place of the two spaced rollers shown, butthe lateral ly-spac-ed rollers are desirable because they exert a feeding-pressure upon the pattern at pointsdisposed at each side of the cutter tosteady the work.

During thecutting. operationit isnccessary that means be provided for guiding the pattern as the work is fed relative to the cutter, and this guide, in the embodimeiit of the invention shown, consists of a rule roll 4-6 concentric with the vertical shaft 15, and

' rocked by the machine attendant to therefeeding work to the cutter 2a is provided with means similar to that just described for holding the slide in its retracted position.

In some classes of work the blank to be operated upon cannot be readily clamped to its pattern. This is true in the case oi the flat cover for a toilet seat, such as shown in engagement with the cutter 24 in Fig. 3. This cover 73 has no central opening to receive clamping means, but it may be secured to its pattern by providing the latter with small spurs or pins T l which project into the under face of the cover 73. In this type of work it may not be practical to provide the pattern with a central opening similar to the opening ll provided in the pattern 30, and as a result the spaced rollers cannot be used with such a pattern. In this case the bridge member may be readily removed by unscrewing the bolt and engagement between the pattern for the cover 73 and the slide 34; may be obtained by providing the pattern with downwardly extending pin 76, which engages the notch 77 atthe'inner end of the slide 34. In this construction it will be apparent that the inward feeding pressure of the slide 2n acts H, k upon the pm H) to force the c ver 43 1nto active engagement with the cutter.

hen thepins 74 are relied upon to secure the work 73 to its pattern, there is danger that the cover may work upwardly away from its pattern, under the action of the cutter, and novel means to avoid this will now be described. This means consists of an element supported near the cutter and in spaced relation to the upper face of the table 12 so that the element will exert a substantial downward pressure upon the work and pattern during the cutting operation. In the construction shown, an upstanding post 78 is rigidly secured to the upper fac ol the table 12 adjacent either cutter by bolting the flange plate '79 at the lower end of this post to the table, and upon the post 78 is'mounted a split sleeve 80 which may be clamped in any desired position of adjustment lengthwise of the post by tightening a clamping bolt 81. The sleeve 80 is provided with a laterally extending portion 82 provided with elongated slots 83 adapted to receive the clamping bolts Sal. The bolts 8-l-are adapted to secure an arm 85 rigidly to the portion 82 in different positions of adjustment. The arm 85 carries at its outer end a vertically disposed sleeve 86 in which a plunger 87 is slidably mounted, which plunger is provided at its lower end H with a roller 88 adapted to engage the upper face of the work. The roller 88 is of the universal type that will rotate freely in any direction so that it will roll smoothly upon the work when the latter is given a rotative movement relative to the cutter or is moved laterally toward and from the cutter, and the roller is shown as mounted in a socket having an upwardly extending stem 89 which is secured within the plunger 87 by a set screw. It is desirable that the roller 88 be held in engagement with the work by a yielding, downward pressure, and this is accomplished by confining a spring 90 within a socket formed partly in the upper end of the plunger 87 and partly within an adjustable screw 91, which screw may be r0- tated to vary the tension of the spring 90. The downward movement of the plunger 87 is limited by a shoulder 92 adapted to engage a cooperatingshoulder formed in the sleeve 86, and the upward movement of the plunger may be limited by the nut 93. A the the means (just described) for maingaining a downward pressure upon the work and pattern is very desirable when there is danger of the work becoming disengaged from the pattern, as in the case of the cover 73, the holding means just described may be used to advantage, even when there is no danger of the work becoming disengaged from the pattern, as it serves to prevent the work from rising under the action of the cutter. The upstanding shaft 78 is preferably provided with a second sleeve 8O which may be rigidly secured to the shaft 88 in any desired position, and this sleeve serves to determine the position in which the sleeve 80 should be clamped, should the some he raised for any purpose, and it should be desired to return the same to its former position.

When work is first brought into engagement with the cutter there is danger that the rapidly rotating cutter will draw the work inwardly rapidly, with injurious effect, and this is particularly true where a radius cutter is provided which extends over the work a substantial degree, as is the case with the cutters 13 and 24. In the construction shown, the rac l9 and gear 50 insure that the work will be fed smoothly pa-st the cutter after the rack and gear have intermeshed, but th work may be dragged inwardly by the cutter before the gear 50 has engaged the rack, unless means is provided to prevent this. In the present casedangcr of the work being drawn in by the cutter is avoided by providing either the pattern 30 or the pattern for the cover 73 with an outwardly extending arm 9 ladaptcd to engage th rub 1'01146 and prevent movement of the work in the direction in which the cutter rotates. This arm may be disposed in anotch 95 formed in a pattern, and may be pivotally secured in place by a pin 96 (see Fig. A spring 97 is loo provided for normally holding the arm 94 in the position shown in Fig. 3, but the arm '94 may swing about its pivot inwardly under a slight pressure to the folded position shown in dotted lines. -The arrangement of the arm 94' shown in Fig. 3 is such that after the arm has performed its function and as the work 73 is rotated in a contraclockwise direction, as indicated by the arrow, the arm will be gradually moved away from the rub roll 46 and when the work has been'rotated thru almost a complete circle the opposite side of the arm 94 will engage the opposite side of the rub roll 46, whereupon th arm 94 will be swung about its pivot 96 sufficiently to permit the cutter to actentirely around the cover 7 3 to complete its cutting operation, and as soon as the arm is moved out of engagement with the rub roll, it will be swung by the spring 97 to its normal 'operativeposition, shown in full lines in Fig. 3.

In the present device the electric motors serve to drive the cutters at a high speed,

and, since means is provided for automaticallyholdinga pattern against its rub roll, and power means is provided for feeding the work smoothly past the cutter, the present machine will cut satisfactorily against the grain of the wood as well as with the grain, and as a result the cutting opera tion may be performed entirely around the work by' a single cutter.

In the construction so far described the pattern and work are rotated relative to the cutter by a rack that encircles the pattern -and meshes with a drive gear 50. This is a a good practicalconstruction and permits the =pattern and work to be readily removed from and applied to the machine, and this construction serves to feed the work past the cutter at a uniform speed irrespective of 1ts configuration or distance of different parts i of th work from a central axis. In some cases it may be desirable to drive the pattern from a central axis so that the speed at i which a portion of the work is fed past the cutter will depend upon the distance of the same from the central axis of the pattern,

7 ing the pattern through the central axis are and two different formsof means for drivshown in Figs. 5, 6 and 7 In Figs. 5 and 6 the table 12 has the rotating cutter'24 secured to a driving shaft/125 the same as in Fig. 1, and the slide 34 moves toward and from-the cutter in a. slot 35,.as'

above described, and is urged toward the cutter by the cable 36 provided with the weight 40. The work 98 is placed upon the pattern 99, andif the work has a central opening, as shown in Fig. 6, it may be secured to the pattern by a bolt 100. extending through the clamping bar 101. The pattern 99 is mounted upon a central shaft 102 rotatably mounted in a sleeve 103 secured in the slide 34, and the pattern rests u on a plate 104 secured to the shaft 102 an may be rigidly secured to the shaft by tightening the clamping nut 105 engaging the threaded upper end of the shaft. The nut 105 is shown as lying within a recess of the pattern so that it will not preventa piece of fiat work such as indicated by 73 in Fig. 3 from being seci red to the pattern, in which case the bolt that screws into the upper end of the shaft 102 is omitted.

The means for driving the shaft 102 should be so constructed that itwill not interfere with the movement of the slide 34 toward and from the cutter, and to this end the portion of the shaft 102 projecting downwardly from the slide 34 is provided with a worm gear 106 that meshes with a drive screw or worm 107 extending alongside the path of travel of the slide 34. The arrangement is such that the worm gear rolls along the screw 10? as the slide moves along its path of travel. The ends of the screw shaft 10? are journaled in brackets 10S, and this shaft is driven from a shaft 109 by the spiral gears 110, 111. The shaft 109 is driven by the usual cone pulley 112. As a; result of this construction driving movement will be imparted from the screw shaft 107 to the pattern irrespective of the position of the lide in its slide-way. During the cutting operation the pattern 99 is held by the weight 40 against the rub ring 112 which may rotate within the portion 48 of the table. I

It may be desirable to provide the pattern shaft 102 with a clutch for starting and stopping the rotation of the pattern, and to thisend the worm wheel 106 is rotatably mounted 011 the shaft 102, and a clutch element 113 keyed to the shaft 102 may be moved into and out of engagement with a clutch element 114 of the worm gear. The

clutch element 113 may be shifted to and from its active position by hand-operated means.

The construction in Fig. 7 differs from that shown in Figs. 5 and 6 in that a sprocket wheel and chain are employed in place of the worm wheel and screw of Figs.

5' and 6. The pattern of Fig. 7is provided with a central shaft 102 the same as in Figs.

'5 and 6 and the lower portion ofthis shaft parallel to the path of travel of the'slideso that the sprocket wheel will remain in engagement with its chain as the slide moves back and forth. When the work rotating.

means shown in Figs. 5,6 and 7 is employed,

the pattern is under the positive control of the drive means as the work moves lnto and ,out of engagement with the cutter, with the result that the work is prevented from being rotated rapidly by the cutter.

IVhat is claimed is 1- 1. In a wood working machine, in combination, a vertical shaft for supporting and rotating a cutter a pattern to which the from the cutter, and means under the control of the treadle means and moving automatically into position to secure the slide in its retracted position.

2. In a wood working machine, in combination, a vertical shaft for supporting and rotating a cutter, a pattern to which the work is secured, a pattern guide adjacent the cutter, a slide supported for movement toward and from the cutter, yielding means for urging the slide toward the cutter, a projection between the slide and pattern for holding the work against the cutter, a treadle operable to retract the slide, and latch means for holding the slide retracted.

3. In a wood working machine, in combination, a vertical shaft for supporting and rotating a cutter, a pattern to which the work is secured, a pattern guide adjacent the cutter, a slide supported for movement toward and from the cutter, yielding means for urging the slide toward the cutter, a projection between the slide and pattern for holding the work against the cutter, and a rocking lever movable into operative engagement with the slide to retract it when moved in one direction and movable out of operative engagement with the slide when moved in the opposite direction.

4. In a wood working machine, in combination, a vertical shaft for supporting and rotating a cutter, a pattern to which the work is secured, a pattern guide adjacent the cutter, a slide supported for movement toward and from the cutter, yielding means for urging the slide toward the cutter, means for imparting the movement of the slide to the pattern to force the work against the cutter, lever actuated means for retracting the slide, .a latch for holding the slide re. tracted, and foot actuated means for releasing the latch.

5. In a wood working machine, in combination, a vertical shaft for supporting and rotating a cutter, a pattern to which the work is secured. a pattern guide adjacent the cutter, a slide supported for movement toward and from the cutter, yielding means for urgln'g the slide toward the cutter, means for imparting the movement of the .slide to the pattern to force the work against the cutter, a treadle operable to retract the slide, a latch for holding the slide retracted, .and

means actuated by a diii'erent movement of the treadle to release the latch.

s. In a wood working machine, in combination, a vertical shaft for supporting and rotating a cutter, a pattern to which the work is secured, a pattern guide adjacent the cutter, a slide supported for movement toward and from the cutter and having pawl receiving teeth, yielding means for urging the slide i10\ ard the cutter, means for in'lparting the movement of the slide to the pattern to force the work against the cutter, and a pawl mounted to engage the teeth of the slide and retract the slide when moved in one direction and to release the slide when moved in the opposite direction.

7. In a wood working machine, in-combination, a vertical shaft for supporting and rotating a cutter,.a pattern to which the work is secured, a pattern guide adjacent the .cutter, a slide supported for movement toward and from the cutter, yielding means for urging the slide toward the cutter, means for imparting the movement of the slide to the pattern to force the work against the cutter, an arm protruding from the pattern to en gage the pattern guide and hold the work from rushing against the cutter and mounted for movement upon the pattern to an inopcrative position, and spring means for returning the arm to its operative position.

8. In a wood working machine, in combination, a vertical shaft for supporting and rotating a cutter, a pattern to which thework issecured, a pattern guide adjacent the out tor, a slide supported for movement toward and from the cutter, yielding means for urging the slide toward the cutter, means for imparting the movement of the slide to the pattern to force the work against the cutter, an arm mounted within a depression within the pattern and protruding therefrom to engage the pattern guide and hold the work from rushing against the cutter and mounted for movement within the depression to an inoperative position, and spring means for returning the arm to its normal operative position.

9. In a wood working machine, in combination, a rotating cutter, a pattern to which the work is secured, pattern guide adjacent the cutter, means for supporting the pattern for movement relative to the cutter, an arm protruding from the pattern to engage the pattern guideand hold the work from rushing against the cutter, and means for supporting said arm for movement to an inactive position as an opposite portion of the arm is forced against the pattern guide.

10. In a wood working machine, in combination, a rotating cutter, a pattern to which the cutter and positioned to engage said,

surface, means for supporting the pattern for rotative movement relative to the cutter and for movement laterally toward and from the cutter, and means for holding the work firmly seated upon its pattern during the cutting operation, comprising a depressor supported in spaced relation to the pattern support and provided with an universal roller that engages the work at a point near the cutter and is adapted to roll freely upon the work when either a rotative or lateral movement is imparted to the latter.

1]. Ina wood working'machine, in com bination, a rotating cutter, a pattern to which the work is secured and having a profile guiding surface, a pattern guide adjacent the cutter and constructed to engage said surface and holdthe pattern a predetermined distance from the cutter, means for supporting the pattern for rotative movement relative to the cutter and for movement laterally toward and from the cutter, and

yielding means forholding the work firmly seated upon the pattern, comprising a vertically movable plunger supported above the pattern and provided with an universal roller that engages the workat a point near the cutter and is adapted to roll freely upon the work when either a rotative or lateral movement is imparted to the latter.

12. In a wood working machine, in combination, a work supporting table, a rotating cutter, a pattern to which the work is secured and having a profile guiding surface, a pattern guide adjacent the cutter and constructed to engage said surface and hold the pattern a predetermined distance from the cutter, means for urging the work and pattern toward the cutter and constructed so that they may be rotated relatively to the cutter and moved laterally towards and from the cutter, and means for holding the work and pattern firmly seated upon their respective supports during the cutting operation, comprising an universal roller supported in spaced relation to the table to receive the work and pattern between it and the table and adapted to engage one of them and exert a substantial downward pressure upon the same and also to roll freely upon the same when either a rotative or lateral movement is imparted to the pattern and work.

13. In a wood working machine, in com bination, a rotating cutter, a pattern upon which the work is mounted and having a profile guiding surface, a pattern guide constructed to engage said surface and hold the pattern a predetermined distance from the cutter, means for supporting the pattern for rotative movement relative to the cutter and for movement laterally toward and from the cutter, and means for preventing the workfrom rising during the cutting operation, including an arm supported in spaced relation to the pattern support, a plunger supported by the arm for vertical movement and urged downwardly by spring pressure, and means at the lower end of the plunger for engaging the work and constructedto move freely over the surface of the work when either a rota-tive or lateral movement is imparted to the latter.

14:. In a wood working machine, in combination, a shaft for supporting and rotating a cutter, a pattern to which the work is secured, a slide mounted for movement toward and from the cutter and upon wnlch the pattern is rotatably mounted, a shaft journaled on said slide to rotate the pattern, a worm gear secured to said shaft, a driving screw meshing with the worm gear and extending in the direction in which the slide travels so that the gear remains in mesh with the screw the slide moves back and forth, and means for driving the screw to rotate the pattern relative to the cutter.

15. In a wood working machine,cin co1nhination, a rotating cutter, a pattern to which the work is secured, a slide mounted for movement toward and from the cutterv and upon which the pattern is rotatably mounted, a driving shaft for the pattern journaled upon the slide, a toothed wheel in driving engagement with the pattern shaft, and a driving element for the toothed wheel extending in the direction inwhich the slide travels and constructed so that it will remain in mesh with the toothed wheel to drive the pattern asthe slide moves hackand forth relative to the element.

16. In a wood working machine, in combination, a rotating cutter, a pattern to which the work is secured, a slide mounted for movement toward and from the cutter, a shaft rigidly secured to the pattern and journaled in said slide, a toothed wheel for 'driving the pattern shaft, and a driving element for the toothed wheel supported independently of the slide and extending parallel to the path of movement of the slide so that the toothed wheel will remain in operative engagement with the element as the slide moves toward and from the cutter.

17. In a wood working machine, in combination, rotating cutter, a pattern to which the work is secured, a slide mounted for movement toward and from the cutter, a shaft rigidly secured to the pattern and journaled in said slide, a toothed wheel for driving the pattern shaft, and a driving element for the toothed wheel supported independently of the slide and extending parallel to the path of movement of the slide so that the toothed wheel may roll along the driving element with its teeth in mesh therewith as the slide moves to and from the cutter. 1

18. In a wood working machine, in combination, a shaft for supporting and rotating a cutter, a pattern to which the work is secured, a slide mounted for movement toward and from the cutter, a shaft rigidly secured to the pattern and journaled in said slide, a drive shaft supported independs ently of the slide and extending parallel to the path of travel of the slide, means for driving the last mentioned shaft, and a driving' connection between the drive shaft and pattern shaft to operate the latter and con structed to permit the pattern shaft to move lengthwise of the drive shaft without interrupting the driving engagement.

19. In a wood working machine, in combination, a rotating cutter, a pattern to which the work is secured, a slide mounted for movement toward and from the cutter, a shaft rigidly secured to the pattern and journaled in said slide, a toothed wheel for driving the pattern shaft, a driving element supported independently of the slide and extending in the direction in which the slide travels so that the toothed wheel will remain in operative engagement with the driving element as the slide moves toward and from the cutter, and a clutch cooperating with the pattern shaft to start and stop the rotation of the pattern.

20. In a'wood working machine, in comhination, a rotating cutter, a pattern to which the work is secured, a slide mounted for movement toward and from the cutter and upon which the pattern is mounted for rotation past the cutter, a shaft supported by the slide to rotate the pattern, a tooth wheel secured to the shaft to drive it, and driving means for the toothed wheel supported, independently of the slide and exsurface and hold the pattern spaced from the cutter, a slide mounted for movement toward and from the cutter, a shaft rigidly secured to the pattern and journaled on said slide, a toothed wheel for turning said shaft to rotate the pattern, and a driving element for the toothed wheel supported independently of the slide and extending parallel to the path of movement of the slide so that the toothed wheel will remain in operative engagement with the element as the slide moves towards and from the cutter.

22. In a wood working machine, in comhination, a rotating cutter, a work support, a slide mounted for moving toward and from the cutter, a shaft rigidly secured to the work support and journaled on said slide, a toothed wheel for driving said shaft to rotate the work support, and a driving element for the toothed wheel supported independently of the slide and extending parallel to the path of movement of the slide so that the toothed wheel will remain in operative engagement with the driving element as the slide moves towards andfrom the cutter.

In testimony whereof, I have signed my name to this specification.

WILLARD N. SAVVYER.

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