US2542373A - Woodworking machine attachment to a jig saw - Google Patents

Description

Feb. 20, 1951 F. J. TQLLAFIELD wooDwoRKING MACHINE ATTAcmaENT To A JIG sAw 3 Sheets-Sheet l Filed June 18, 1947 mm Q @Ma/5f m/a w o G\ G 3 2 0 7 t n e 2 4 s 'I 5, @www 2 e 6 WMS` WV@ S3 nIu QQ J A DN `T FC Mm LM O Tm .I Jw Em G N M m w 07 WM. l m 9 l e o, m 2 Tu .w Lw, n F nn.'

Feb. 20, 1951 F. J. 'roLLAFlELD woonwoRxTNG MACHINE ATTACHMENT To .A JTG sAw 3 Sheets-Sheet 3 Filed June 18, 1947 QQN QQW .41cm QAM.,

Ctornegs Patented Feb. 20, 1951 WOGDWORKING MACHINE ATTACHMENT TO JIG SAW Frederick J. Tollafeld, Detroit, Mich. Application June 18, 1947, Serial No. 755,283

6 Claims.

This invention relates to woodworking ma chines, and in particular to convertible woodworking machines, having interchangeable attachments for performing diierent woodworkin operations.

One object ci this invention is to provide a convertible woodworking machine cons'sthig of a jigsaw having a frame with an upright upon which various interchangeable attachments may be clamped for performing different woodworking operations, for example, a circular saw, a Shaper or planer, a lathe, a drill press, a band saw, and a rotary spindle which is adapted to interchangeably receivev a grinding wheel, a buiiing wheel or a sanding disc.

Another object is to provide a convertible woodworking machine, as set forth in the preceding object, wherein the various attachments have slotted legs by which they are secured to the upright portion of the jigsaw frame, the shafts of the various attachments having pulleys which are in line with a pulley upon the jigsaw machine so as to be driven from the last-mentioned pulley.

Another object is to provide a convertibewoodworking machine, as set forth in the preceding objects, wherein the upright portion of the jigsaw is provided with a machined portion and the various attachments are provided with mating machined portions, the aforesaid machined portions being clamped into engagement with one another so that all of the attachments fit onto the same machined portion oi the jigsaw frame.

Another object is to provide a convertible woodworking machine, as set forth in the preceding objects, wherein the attachments are provded with rotary shafts supported in spaced bearings which are interconnected by an attachment frame, the attachment frame having an upright portion which is releasably attacha'ble to the upright portion of the jigsaw frame.

Another object is to provide a convertible woodworking machine, as set forth in the preced'ng objects, wherein the jigsaw frame is provided with a pair of spaced upright portions and the various attachments each provided with a pair' of spaced legs releasably attachable to these upright portions.

Another object is to provide a convertible woodworking machine, as set forth in the object imf mediately preceding, wherein the spaced legs are apertured to receive fasteners by which the attachment legs are clamped to the upright portions of the jigsaw frame.

Another object is to provide aconvertble woodworking machine, as set forth in the preceding objects, wherein the attachment frame is movable vertically relatively to the jigsaw frame so as to provide for tightening or loosening the belt by which a pulley on the attachment drive shaft is driven by a pulley on the jigsaw machine.

Another object is to provide a convertible woodworking machine, as set forth in the object im mediately preceding, wherein the attachment frame is movable vertically by a manually yoperated. cam mechanism for tightening or loosening the driving belt.

Another object is to provide a convertible woodworking machine, as set forth in the preceding objects, wherein the various attachments are attachable and detachable at will, thereby enabling the owner of the machine to perform a wide variety of operations which would otherwise require the purchasing of separate machines and the increased space in which to mount such machines, so that the owner thereby avoids both the expense of the separate machines themselves, as well as the cost of the space for them.

In the drawings:

Figure 1 is a side elevation of a convertible woodworking machine, primarily a jigsaw, according to a preferred form of the invention, partly broken away to show the clutching arrangement and also the clamping device for the various attachments, the attachment shown being a planer;

Figure 2 is a right-hand end elevation of the jigsaw and planer attachment shown in Figure l;

Figure 3 (Sheet 1) is a horizontal section along the line 3-3 in Figure 1, showing details oi the mounting legs for the attachment machines and the manner in which they are clamped to the upright portion of the jigsaw frame;

Figure 4 (Sheet 3) is a front elevation of a bandsaw attachment, interchangeable with the planer attachment on the jigsaw shown. in Figure 1;

Figure 5 is a right-hand side elevation of the band saw attachment shown in Figure 4;

Figure G (Sheet 2) is front elevation of a oir cular saw attachment interchangeable with the planer attachment of the jigsaw shown in Figu ure i;

Figure 7 is a right-hand side elevation of the circular saw attachment shown in Figure Figure 8 is a horizontal section along line 3-8 in Figure 7, showing details of the attachment frame;

Figure 9 is a front elevation of a drill press attachment interchangeable with the planer attachment ofrthejigsaw shown in i;

Figure 10 is a horizontal section along the line It-l in Figure 9, showing details of the attachment frame;

Figure 11 is a front elevation of a disc sander attachment, the spindle of which optionally receives grinding or bufng wheels, interchangeable with the planer attachment on the jigsaw shown in Figure 1;

Figure 12 is a front elevation of a wood-turning lathe attachment interchangeable with the planer attachment on the jigsaw shown in Figure 1;

Figure 13 is an enlarged fragmentary side elevation of the upright portion of a jigsaw employing a modied attachment frame from those shown in Figures 1 to 12 inclusive;

Figure 14 is a fragmentary vertical section along the line Ill-i4 in Figure 13; and

Figure 15 is a fragmentary horizontal section along the line l-l5 in Figure 14.

Referring to the drawings in detail, Figures 1 and 2 show a convertible woodworking machine, generally designated i5, as consisting primarily of a jigsaw, generally designated Il, and an attachment machine, generally designated l2, attachable to an upright portion of the jigsaw frame as described hereafter in more detail. The numeral i2 for the attachment machine shown in Figure 1 is used herein as a general designation for all of these attachment machines, considered generically. The particular attachment machine shown in Figure 1 is also generally designated i3, the latter designation referring to it as a planer attachment.

Interchangeable with the planer attachment I3 shown in` Figure 1 are other attachment machines i2; such as the band saw attachment machine, generally designated It, shown in Figures 4 and 5; the circular saw attachment machine, generally designated l5, shown in Figures 6, 7 and y8; the drill press attachment machine, shown in Figures 9 and 10; the rotary disc attachment machine, generally designated Il shown in Figure 11 and optionally receiving a sanding disc, a grinding wheel or a builng wheel; and a woodturning lathe attachment machine, generally designated I8, shown in Figure 12. All of these attachment machines l2 may be interchangeably substituted for one another in the position shown in Figure 1, and driven from the same pulley on the jigsaw Ii. f

The jigsaw Il consists of a base or subframe i9 (Figures 1 and 2) having attachment feet 25 for mounting upon a bench or other suitable supportions or members 23 and 25 that the various 'gramrnatically The subframe i9 is hollow and has a plurality of downwardly projecting bosses or lugs 2l to 53 inclusive, the boss or lug 53 forming a portion of one of the end walls 55 and 35 of the subframe i5. The end walls 34 and 35 are of roughly triangular shape (Figure 2) with theop- 4 posite side walls 36 and 3i inclined upward to meet a narrow top Wall 38.

Journa.ed in the bosses 28 and 29 is a shaft 39 (Figure 1), the left-hand end of which carries a disc d with an eccentric pin il mounted in an eccentric bore i2 near the periphery thereof. The pin Iii pivotally engages a bore 43 in one end of a link or pitman 45, the other end of which is bored as at 45 to receive a pin 4G connected to a crosshead or block fil having a Vertical bore 58. Mounted in the Vertical bore 48 and secured therein, as at 45, is a vertically reciprocable shaft 50. The latter is reciprocably mounted in a, Vertical bore 5l in the boss or lug 2, and therupper end carries a lower chuck 52 adapted to hold the lower end of a jigsaw blade 53. The latter passes Vupward through a hole 54 in a worktable 55 and its upper end isvheld in an upper chuck 56. The upper chuck 56 is mounted upon the lower end of a vertically reciprocable shaft or plunger 5'5 which is movable up and down in a bore 58 in the outer end of the horizontal portion 211 of the frame member or bracket 22; At the top of the frame portion 2li a recess 59 is provided for a cup-shaped cap 65. The latter serves as an enclosure for the upper end of the shaft 51 and a coil spring 6i which surrounds it. One end of the coil spring 5l is seated against the bottom of the recess 59 and the other end engages a head 62 on the upper end of the shaft 51. The coil spring El constantly urges the shaft 5': upward and maintains the saw blade 53 in a taut condition while it is reciprocated vertically Vby the mechanism described above.

The outer end of the horizontal portion 24 of the frame member 22 is provided with a verticalY bore 63 in which is mounted a presser foot shaft Eli, preferably of square cross-section and having a forked presser foot 55 secured to the lower end thereof and extending on opposite sides of the saw blade 53. The presser foot shaft 64 is adjustable vertically in order to adapt it to varying thicknesses of workpiece, and is clamped in a vertical position of adjustment by the adjusting screw 55. The Worktable 55 with which it cooperates is provided with a pair of parallel downwardly-extending arms El which are pivotally and adjustably secured to the arms of a U-shaped frame 68 by bolts 69. The U-shaped frame 68 is mounted on the subframe i9 above the previously described mechanism for reciprocating the saw blade 53.

Mounted near the inner end of the shaft 33 (Figure l), is a movable clutch collar l5 which is splined or keyed as at 'H to the shaft 39 so as to establish a driving connectionrtherebetween. The clutch collar 1!! is provided with clutch notches i2 which are engageable with projections i3 (one only of the notches 'i2 and Vprojections 'i3 being shown) on a clutch collar M. VThe clutch'collar 14 has a'bore l5 therein, the forward end of which receives the adjacent endof the shaft 39 and the rearward end of which receives the forward end of a drive shaft and is pinned thereto as at 11. The drive shaft i5 is journaled in the downwardly-extending bosses 30 and 3l, and carries a pulley 'E8 which is secured thereto in driving relationship. The pulley i8 is driven by a belt 19 from a motor or other suitable source of power.

The opposite end of the shaft 15 is connected l to a shaft BG by means of xed and movable larly designated parts (Figure 1).` Each-of the collars 75 has an annular groove 8| therein. vThe left-hand clutch unit, generally ldesignated 82, (Figure 1), is actuated by pins 83 ina clutchshifting yoke d. The right-hand clutch unit, generally designated 85, is similarly actuated by pins 85 in a clutch-shifting yoke 87. The clutchshifting yokes 3d and 87 are similar in construction and are similarly pivoted, as` at 88 (Figure 2), to bosses 89 (one oniy being shown), rising from the subframe side wall 3B.

The shaft 8@ is journaled in the bosses 32 and 33 extending downward within the subframe I9 (Figure l), and on its outer end carries a pulley 9i] `by which the various attachment machines are driven. The uprights 23 and 26 are provided with machined nat surfaces'iil and 92 having oppositely-facing vertical grooves 93A and 94 respectively (Figure 3). The upright 23 is provided with an internal boss 95 (Figure 1') which has a threaded bore 95 adapted to receive a cap screw 97. Similarly, the upright 26 is provided with a threaded bore 98 adapted to receive a cap screw 55 facing in the opposite direction. The uprights 23 and 25 are provided with aligned transverse bores |55 and ||l| in which are journailed the opposite ends of a cam shaft |52 having cams |63 and |95 pinned or otherwise secured thereto near the opposite ends thereof. The upright is cut away as at |95 to receive the cam |55. An operating arm or handle |93 is pinned or otherwise secured to the cam shaft |02.

Planer attachment |98 are provided .f

CII

|58 and the machine attached thereto may be v moved up and down by swinging the arrn or handle |56, thereby tightening or loosening the belt 2 from the pulley 59.

The slotted legs |57 and |98 are interconnected by a tie member 3 (Figure 3) which has a laterally-projecting portion H4 containing an end slot |5 forming a pair of spaced arms ||6 having aligned bores ||7 in which pivot pins H8 are journalled (Figure 2). The pivot pins H8 are either integral with 0r mounted on a hub 9 having a vertical bore |25 therein containing a threaded rod (2|. Lock nuts |22 and v|23 above and below the hub ||9 serve to lock the rod |2| in position after it has been moved upward or .downward within the bore |25. The upper end of the rod |25 terminates in a head |24 pivoted on a pivot pin |25 supported by spaced ears |26 extending downward from a Work table |27. The work table |27, remote from the ears |26, is provided with additional spaced ears |28 which support pivot bolts |29 (Figure 2) by table |27 is adjustably and pivotally mounted on arms $35 extending 4upward and rearward from the legs |97 and |98.

The work table |27 is provided with an elongated aperture |3| (Figure 2) through which project the cutting blades |32 mounted on a planer by which the attachments I2 are driven which the work f Bandeau) attachment The bandsaw attachment |4 (Figures 4 and 5) consists of a, pair of spaced legs |49 similar to the spaced legs |57 and |98 of the planer attachment I3 and similarly provided with inverted U-shaped slots 14| adapted to slip over the Shanks of the cap screws 97 and 99 and having similar ribs |42 engageable with the slots 93 and 94 (Figures 5 and 3). The forward and rearward sides of the legs are interconnected by plates 0r bars |53 and |45 bolted thereto. The bar |55 is extended beyond the end of the bar 53 and has connected thereto a vertical approximately arcuate bracket |55 extending above and below the bar |54 and having bosses |45 and 57 at its upper and lower ends respectively. Mounted in the bosses |45 and |47 are stub shafts |58 and |59 (Figure 4) on which are mounted the 4bandsaw pulleys or discs and I5 Trained over the bandsaw discs |59 and |5| is an endless bandsaw |52.

The bandsaw pulleys or discs and r`5| are rotated by a pulley |53 (Figure 4) secured to the disc 55| and driven by a belt |54 from a pulley |55 secured to the end of a shaft |55 journaled in the sleeves |57 and |58 mounted in the upper end of the legs |45. The shaft |53 is driven by a pulley |59 mounted thereon and in turn driven by the belt ||2 (Figure 1). The pulley |59 therefore corresponds to the pulley |37 of the planer attachment I3. The bandsaw attachment i5 is provided with a worktable which has downwardly-extending ears il journaled on the Sleeves |57 and |58. The worktable |55 is provided with an aperture |62 through which passes the bandsaw |52. In order to tilt the worltable |50 at the desired angle, one of the ears |S| is provided with an integral boss E63 (Figure 5) which is provided with a threaded bore |55 containing a thumb screw |65. By loosening the thumb screw |65, the worktable |55 may be tilted around the sleeves |57 and |58, after which the thumb screws |55 may be tightened to lock the Worktable |69 in its adjusted position.

Circular saw attachment The circular saw attachment i5 (F and 8) is provided with a pair of spe with inverted U-shaped slots il einen.; slots |4| and |99 of the bandsaw pl attachments lll and l5 respectively, an simi provided with outwardly-facing ribs l2. fore, the slots i7! and ribs |72 serve to engage the capscrews 97 and 95 and vertical grooves 93 and 95 in the uprights 25 and 2li respectively (Figures 1 and 3). The legs |79 are interconnected by webs |73 (Figure il) to render the structure rigid. Journaled in the oppositelyfacing bosses |75 at the upper end of the legs |75 is a rotary shaft |75 carrying a pulley |75 and a circular saw |77 secured thereto by a washer or collar |77 and nut |78, the latter being threaded upon the end of the shaft |75. The pulley |76 is so located as to be directly above SaW,

. 7 the pulley 90 (Figure 1) and drivenkby the belt ||2 when it is in position upon the machine I0.

The circular saw attachment I is provided with a tiltable work table |19 having downwardlyextending ears |30 at its opposite sides, the ears |80 being pivotally mounted, as by the pivot pins |9|, upon the angle'arms |92 having their horizontal portions secured, as at |83, to the upper ends of shafts |94 passing through vertical bores |85 in bosses |86 extending outward in opposite directions on opposite sides of one of the legs |19. Set screws |81 threaded into the bosses I89and engaging the shafts |84 serve to lock the latter in their vertical positions of adjustment. varying the adjustment of the shafts |84 up or down, the depth of cut taken by the circular saw |11 is correspondingly adjusted. The circular |11, as usual, projects through a slot |08 in the top of the worktable |19 which, as previously stated, is tiltably mounted upon the pins |8| serving as trunnions.

In order to lock the worktable |19 in its tilted position, the former wardly-extending ear |89 into which is threaded a pivot bolt |99 (Figures 6 and 7). Pivotally mounted upon the pivot bolt |99 is a link |9| having an elongated slot |92 therein. The slot |92 receives a stud or screw |93 which is threaded into a bore |94 in the outer end of an arm |95, the opposite end of the arm |95 being co-exten- -sive with one of the angle arms |92. Thus, by

loosening the screw |93 by means of the handle |99, the link |9| can be unclamped from the arm |95, so that the left-hand end of the table |19 (Figure 6) may be swung upward or downward around the trunnion pins |8I.

n Drill press attachment The drill'press attachment I6 (Figures 9 and the disc sander or grinding wheel attachment l1 (Figure 11), and the lathe attachment I9 (Figure 12) are supported on similar pairs of spaced legs 299 which are therefore similarly designated by reference numerals. Like the legs |91 and |08 of the planer attachment |3 (Figures 1, 2 and 3), the legs |49 of the bandsaw attachment I4 (Figures 4 and 5) and the legs |10 of the circular saw attachment l5 (Figures 6, 7 and 8), the legs 290 are longitudinally slotted, as at Y 29| (Figure 10) to receive the Shanks of the cap screws 91 and 99, and are also provided with longitudinal ribs 292 similar to the ribs ||9 and ||I (Figure 3), |42 (Figure 5) and |12 (Figure 7) and for the same purpose. similarly interconnected by webs 203 (Figure 10') as in the other attachments previously mentioned. vThe legs 299 of the attachments I6, |1 and I9 near their upper ends are also provided with oppositely-facing bosses 204 with aligned bores 295 therein. Journaled in the aligned bores 295 is a shaft 296 near one end of which is secured the hub of a pulley 201 adapted to be driven from the pulley 99 (Figure 1) by the belt 2.

ln the drill press attachment I6 (Figure 9) a work table 293, is mounted upon and integral with the bosses 294 and serves additionally to interconnect them as well as to provide a support for the workpieces to be drilled. Bolted to the work table 269 is a vertical column 299 having a pair of bearing arms 2I9 and 2| in which is mounted a quill 2|2. The quill 2|2 is keyed or splned to the arms 2|9 to prevent its rotation, and within the arm .2H is provided with rackrteethmot shown) engaged by a pinion mountedon a transverse shaft 2 3 which is journaled in the arm 2| I.

is provided with a down-' The legs 299 are also Mounted on one end of the shaft 2|3 is a hand lever 2|4. By swinging the hand lever vertically, the quill 2|2 is moved up and down.

J ournaled in the quill 2|2 is a rotary shaft 2|5 upon which is mounted a pulley 2|3 and a driving connection established therebetween by a key or spline, as is well known in conventional drill press construction. Mounted on the lower end of the shaft 2 I5 is the usual drill chuck 2 I1 in which standard drills may be mounted. Extending rearwardly and upwardly from the column 209 is an arm 2|8 in the end Aof which a shaft 2I9 is mounted and which carries a pair of loose pulleys or idler pulleys 229 (one only being shown). An endless belt 22| is trained overthe pulleys 2|6, 2|9 and 220 and also around a pulley 222, the hub of which is mounted on the shaft 206 so as to be driven therefrom. The details of the drill press above the work table 298 areV conventional. Y

Disc sander and grinder attachment Vconnection with Figure 9. The shaft 296 in the attachment I1, however, is provided with an extended portion 223 upon which is mounted the hub of a sanding disc 224 to which a layer of sheet sanding material 225 is secured, as by a suitable adhesive. The hub of the disc 224 is provided with a bore 226 into which the shaft extension 223 projects, the hub being pinned. keyed or otherwise drivingly secured to the shaft portion 223. A pair of arms 221 is secured, as at 229, to one of the legs 299 on opposite sides thereof (one arm only being shown) and these are bent downward past the periphery of the sanding disc 224. Secured to the end portions of the arms 221 is a work rest 229. Since the shaft 296 is adapted to receive any rotatable object, it may obviously receive a grinding wheel or buffing wheel in place of the sanding disc 224, and the invention so comprehends. A collar 239 secured to the left-hand end of the shaft 296 prevents end play of the latter, suitable thrust bearings (not shown) being of course provided in actual practice.

Lathe attachment The lathe attachment I8, as regards its legs 200, and shaftV 206 has already been discussed in connection with Figure 9 and this requires no repetition. Like the drill press attachment I6, the bosses 204 at their upper ends carry a table 23| which is preferably integral with the bosses 204 and serves `as an additional strengthening member as well as a support for a'lathe bed 232 bolted ythereto as at 233. .The lathe bed 232 is provided with the usual slotted or grooved ways (not shown) on which are slidably mounted a tool rest slide 239 and a tail stock 235. Mounted on the tool rest slide 234 is a conventional T-shaped tool rest 236, the shank of which is adjustable vertically and is clamped in position by the set screw 231. `The tail stock 235 is provided with the usual dead center or tail stock spindle 236 which is movable to and. fro by means of the hand wheel 231. Both the tool rest slide 234 and the tailstock 235 may be clamped in position by the usual hand wheels and clamping screws (not shown) VeX- tending downward through the lathe bed 232, as is conventional in wood-turning lathe practice.

MountedY on the left-hand endof the lathe V'lli bed 232V remote from the tail stock 235 is a head stock 239 in vwhich ,is,journailed a shaft or live spindle `240, the opposite end ,oiwhichis inurnaled in abearine bracket 24|;extending upward from the `lathe Vbed 232 `VThe inner end of the shaft 240 carries 'the usual face plate y242 the center of which is bored tohreceive the live center 243, preferably with a tapered junction. Mounted on the shaft 240 between the head stock 239 and the bearing bracket 24| is the upper cone pulley 244 which is aligned vertically with a low-v er cone pulley 245 mounted on the left-hand end of the shaft 4206. lThe cone pulleys 244 and 245 are drivingly interconnected by a belt 246 `which may be shifted from one step to the other thereof to change speeds. A collar'241is `secured to the shaft 206 to prevent end motion,4 as in the disc sander attachment l1 `previously described.

Modified attachment `machine i The :modied jigsaw generally designated 250, shown in Figures 13, 14 and 1K5, is generally similar to the jigsaw l|| -anddiffers only in details. `The sub-base or ,sub-frame 25| Vis provided, as before, with a drive shaft 252 journaled therein and having a clutch -unit 253 similar to the clutch units 82 and 85 (Figure 1)Y and similarly provided with a fixed collar V2154 which loosely receives the end of the shaft 252 and a movable collar 255 keyed as `at 255 to the shaft 252 and slidable therealong.V TheV collars 254 and 255 have interengaging :recesses and projections 251 `and 258 respectively.` VAshifting yoke 259unounted on a shaft 2GB-'which Aalso l carries a ha-nd lever `'2 6 fis provided as -zbefore with pins 282 engaging an annulargroove 263 in the clutch collar 255, Thershaft 2.60 vis journaled in the, sub-frame 25| andshifting rofi-the handle 26| drivingly `connects-.or disconnects #the shaft 252 to a shaft :264 cn-Whichfat'he ` clutohncollar 2,54 is `rlxedly' mounted. The shaft 2.64 `is fjournaled at :one end in a bearingfboss-265 Aandiat itsother end in a bearing bracket^266 iboltedas `at12li1 to the extension 288 ofthe subframe 25|. :Mounted on the shaft 2.64cbetween the bearing boss 2.6.5 and the bearing bracket 269 Vhaving twin grooves 210 .and 21|., .either of which is adapted toreceive a belt 212.

The upright 213 `(Figurel) :which forms al portion .of ,the upper frame 214 of the jigsaw 25.8 is proyidedpas inthefprincipal-form -of the ventionlshownxinfFigure l, with internal upper and `lower bosses 215, andi216 respectively fwhich have threaded-bores :218 and '21;9fadanted Vto receive .a `can screw i280 anda :stud screw :2.8L 'f'lhe` stud `screw `28| rservesnas a `pivot shaft for the hub of a cam :282 having a handle-283 attached.v

thereto.` The upright 213 is provided with `a vertical vgroovew284 l(Figure` 15) 'similar to' the vertical groove 93 -1(Figure-3) and :serving to re-: ceive a cooperating rib"28 5 .on :the vertical pori-q The rib and groove',

tion 286 `of a ffran'le1281.I 285 `ano'l".294 serve as .guideways lfor `the vertical adjustment `of the "frame-H28 1` and the cap screw;

23,8 serves lto fclampthe ylatter :in placer/hen the adjustment vhas been made. This adjustment is made hy swinging the handle 283 to rotate Vthecam 292 (Figure '14) against the lewerend of the `frame upright Kportion 2,89.

`The upright portionl286 `of theatrarne 281 isprovided w-ithwanelongated vertical slot 288 .whichserves -to receive the shank of the ,cap screw 280 and which also receives@ Vguldewpin or stud .289

secu-red in the Abore 29,'0jinlthe A11p-rigid; 213. The pinx2-89 is -of the `same Vdiameter A a .s.,the shank of the cap screw 280. and serves to assist the rib vertical rods or shafts 392.

285 and groove 284 in preventing sidewise motion of the frame 281.

Extending .outward from the lower end of the upright portion 286 of the frame 281 is an arm `29| which curves outward and upward parallel to the upright portion 286. These are provided respectively with bearing bosses 292 and 293 (Figure 13) in which are journaled a shaft y294 carrying the hub of a pulley 295e. The latter is aligned with one of the grooves 21| of the double pulley 269` and is driven therefrom by the belt 212. Mounted on the right-hand end of theshaft 294 between collars 295 and .296 is a circular saw 291, the latter being held in position by a nut 298 threaded upon the threaded portion 299 of the shaft 294.

The arm 29| is also provided with bosses 300 on its opposite sides (one only being shown in Figure 13) which are bored as at 38| to receive The shafts 302 are adjustable vertically in the bores 39| and are secured in their adjusted positions by set screws 303. Pinned or otherwise secured to the upper ends of the shaft 392 are two similarly directed offset arms or brackets 384 to which a work table 305 is pivotally secured, as by the pivot bolts 398 passing through the ears 381 depending from the Work table 305. The pivotal construction just described is similar to that shown in Figures 7 and 8. The work table 385 is provided with the usual slot 308 for the passage of the upper portion of the circular saw 291.

Operation In the operation of the invention, the jigsaw is operated in the usual manner by placing a board or other workpiece upon the work table 55. The shifting yoke 84 is then shifted to move the clutch member 1l! into engagement with the clutch member 14 and so throw in the clutch 82 (Figure l) thereby establishing a driving connection between the shaft 39 and the pulley 18 on the shaft 16. The motor driving the belt 19 will then cause the rotation of the :haft 39 and consequent reciprocation of the plunger 58 and saw blade 53, sawing a slot in the workpiece as the operator moves the latter around over the work table 65.

Should the operator desire to plane the workpiece, he shifts it from the worktable 55 to the Worktable |21. He then adjusts the rod |21 upward or downward to regulate the depth of cut of the c'1tter bladeo |32. if le has not already done so. He then shifts the shift yoke 81 to throw in the clutch 85, after having shifted the shift yoke 83 to throw out the clutch 82 and halt operation of the jigsaw The throwing in of the clutch 85 causes rotation of the shaft 88 and pulley 98 and consequently rotates the pulley |31 and planer hub |33. The operator then moves the workpiece across the table |21 and over the aperture 18| containing the rapidly rotating blades |325, thereby taking a cut off the bottom of the workpiece, and planing its lower surface.

Should the operator desire to use the circular saw attachment I5, he loosens the cap screws 91 and 99 (Figure 1) unclamping the legs |81 and |08 from the uprights 23 and 26 of the jigsaw frame. With the legs |01 and |98 thus released, he vswings the handle |86 to rotate the shaft |92 and the cams |93 and |84 to drop the legs |91 and |98 to their lowest positions, enabling the belt l l2 to be removed from the pulley |31. The planer attachment 13 may then be lifted off the cap from'their respective grooves 93 and 94.

The circular saw attachment |11 is then installed by reversing the foregoing procedure, lowering it upon the cap screws 91 and 99 until they enter the slots |1| and the ribs |12 enterthe grooves 93 and 94. When the ends of the legs |19 come to rest upon Vthe cams |03 and these are rotated to their lowestY positions by swinging the handle |06, the belt ||2 is then trained over the pulley |16. The cam lever |06 is then swung downward to rotate the cams |93 and |94 and lift the circular saw attachment bodily, thereby tightening the belt I I2. When the yoke 81 is then shifted to throw in the clutch 85, a driving connection is established between the circular saw shaft and the shaft n16 driven by the pulley 18 and belt 19V from the driving motor, rotating the circular saw |11.

After the cap screws 91 and 99 have been tightened to clamp the legs |19 in their adjusted position, the operator places the workpiece upon the worktable |19 and moves it past the saw |11, cutting the desired portion oi the workpiece. If an angular saw cut is desired, such as for a mitre joint in corner work, the work table |19 is tilted around its trunnion pins |87| by loosening the clamping screw |53, until the work table |19 is at the proper angle, say 45 degrees relatively to the plane of the circular saw |11. The work table |19 is then clamped in its adjusted position by swinging the handle |95 to tighten the clamping screwV |13 against the link |91. The cut is then taken as before, with or without the useof a saw guide.

In a like manner, the circular saw attachment l5 may be removed and either the drill press attachment it, disc sanding attachment l1, lathe attachment i8 or band saw attachment I4 substituted. These attachments i4, i6, i1 and I8 are operated in a similar manner to conventional bandsaws, drill presses, disc Sanders and wood turning lathes respectively. The operation, as concerned with the adjustment of these attachments, has already been described in connection with their construction.

The operation of the modification shown in Figures 13, 14 and 15 is similar to that of the principal form of the inventionshown in Figures 1 to 12 inclusive. This modification is of simpler construction for light duty work, whereas the construction shown in Figures 1 to l2 inclusive is most suitable :for heavy duty work. The frame 231 (Figure 13) is adjusted up or down by loosening the cap screw 28|) and swinging and handle 283 and cam 282, thereby tightening the belt 212 and establishing a driving connection between the pulleys 259 and 295. The worktable 395 is adjusted to the proper angle, if not already so adjusted, in a similar manner to that described in connection with Figures 6, '1 and 8. The workpiece is then sawed by shifting the clutch leverV 2E! to establish a driving connection between the shaft 252 and the shaft tltrotating the circular saw 291. The cap screw 269 is, of course, tightened during this operation so as to secure the frame 281 rigidly to the upright 213. Theremainder of the attachments used with the modification shown in Figure 13 are similar ,to those shown-in connection with Figures l to 12 inclusive, except that the frame 281 is substituted for thetwin-legged frame of Figures l to 12 inclusive. The operation has already been described in connection with the construction of the modification of Figures 13 to 15 inclusive, and requires no elaboration.

What I claim is:

1. An attachment machine adapted to be mounted upon an upright frame portion of a jigsaw having a power takeoff shaft thereon, said machine comprising an attachment frame having an upright portion removably secured to said jigsaw upright portion, an attachment shaft journaled in said attachment frame, a rotary tool on said attachment frame drivingly connected to said attachment shaft, a power transmitting mechanism drivingly interconnecting said shafts, a clamping device releasably securing said attachment frame to said jigsaw frame and adjustment mechanism mounted on one of said frame portions and adjustably engageable with the other frame portion for-'moving said frame portions relatively .to one another.

V2. An attachment machine adapted l to be mounted upon an upright frame portion of a jigsaw having a power takeoff shaft thereon, said machine comprising an attachment frame having an upright portion removably secured to said j i,- saw upright portion, an attachment shaft journaled in said attachment frame, a rotary tool on said attachment frame drivingly connected to said attachment shaft, a power transmitting mechanism drivingly interconnecting said shafts, a clamping device releasably securing said attachment frame to said-jigsaw frame and a rotary adjoining element mounted on'one of said upright frame portions and adjustably engageable with the other'upright frame portion for moving said frame portions relatively to one another.

3. An attachment machine adapted to be mounted upon an upright frame portion of a jigsaw having a power takeoff shaft thereon, said machine comprising an attachment frame having an upright portion removably securedV to said jigsaw upright portion, an attachment shaft journaled in said attachment frame, a rotary tool on said attachment frame drivngly connected to said attachment shaft, a power transmitting mechanism drivingly interconnecting said shafts, a clamping device releasably securing said attachment frame to said jigsaw frame and rotary cam adjustment mechanism mounted on one of said frame portions and adjustably engageable with the other frame portion for moving said frame portions relatively to one another.

4. An attachment machine adapted to bel mounted upon a pair of spaced upright frame portions of a jigsaw having a power take-off shaft'thereon, said machine Acomprising an attachment frame having a pair of spaced upright portions removably secured to said jigsaw upright portions, an attachment shaft journaled in said attachment frame, a, rotary tool on said attachment frame drivingly connected to'said attachment shaft, power transmitting mechanism drivingly interconnecting said shaft, a clamping device releasably securing said attachment frame upright portions to said jigsaw frame uprightportions and adjustment mechanism mounted on one of said frame portions and adjustably engageable with the other frame portion for moving said frame portions relatively to one another.

5. An attachment machine adapted to be mounted upon a pair of spaced upright frame portions of a jigsaw having a power take-off shaft thereon, said machine comprising an attachment frame having a pair of spaced upright portions removably secured to said jigsaw upright portions, an attachment shaft journaled in'said attachment frame, a rotary tool on said attachment frame drivingly connected to said attachment shaft, power transmitting mechanism drivingly inerconnecting said shaft, a clamping de-4 vice releasably securing said attachment frame upright portions to said jigsaw frame upright portions and a rotary adjusting element mounted on one of said upright frame portions and adjustably engageable with the other upright frame portion for moving said frame portions relative- 1y to one another.

6. An attachment machine adapted to be mounted upon a pair of spaced upright frame portions of a jigsaw having a power take-011 shaft thereon, said machine comprising an attachment frame having a pair of spaced upright portions removably secured to said jigsaw upright portions, an attachment shaft journaled in said attachment frame, a rotary tool on said attachment frame drivingly connected to said attachment shaft, power transmitting mechanism drivingly interconnecting said shaft, a clamping device releasably securing said attachment frame upright portions to said jigsaw frame upright portions, a rotary adjustment shaft mounted on one of said frame portions, and a 14 pair of spaced cams mounted on said adjustment shaft and engageable with the other frame portion.

FREDERICK J. TOLLAFIELD.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 128,024 Cunningham June 18, 1872 161,585 Young Mar. 30, 1875 298,056 Bean May 6, 1884 15 310,563 Davis Jan. 13, 1885 1,030,598 Miller June 25, 1912 2,089,074 Sharp Aug. 3, 1937 FOREIGN PATENTS 20 Number Country Date 137,746 France July 9, 1880 106,801 Germany Jan.. 8, 1900

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