US2485159A - Machine for jiggering oval dinnerware - Google Patents

Description

Oct. '18, 1949. R. F. MALARKEY 2,485,159

MACEINE FOR JIGGERING OVAL DINNERHARE Filed Sept. 25, 1948 4 Sheets-Sheet l INVENTOR.

PALPh F. M194 flE/(EY.

BY 3 ,(b 'mzaur, d m www krroe/vifs.

Oct. 18, 1949.

Filed Sept. 25, 1.948

R. F. MALARKEY MACHINE FOR JIGGERING OVAL DINNERWARE 4 Sheets-Sheet 2 YINVENTOR. PAL/PH F1 MALARKEX .Oct. 18, 1949. v MALARKEY 2,485,159

MACHINE FOR JIGGERING OVAL DINNERWARE Filed Sept. 25, 1948 4 Sheets-Sheet 5 IN VEN TOR.

PAL/ H F. MALARKEY.

0a. 18, 1949. R. F. MALARKEY 2,485,159

MACHINE FOR JIGGERING OVAL DINNERWARE Filed Sept. 25, 1948 4 Shets-Sheet 4 INVENTOR. PAL/w E MALARKEY.

Patented Oct. 18, 1949 MACHINE FOR JIGGERING OVAL DINNERWARE Ralph F. Malarkey, Meadowlands, Pa. Application September 25, 1948, Serial No. 51,275

14 Claims.

This invention relates to apparatus for moving a tool in an elliptical path, and more particularly to apparatus for jiggering oval dinnerware and the like.

It is among the objects of this invention to provide such apparatus which is easily adjustable for dinnerware and the like of different sizes and of different lengths relative to their widths, which is of relatively simple and inexpensive construction, which is easy to operate and which is automatic.

In accordance with this invention a lower vertical shaft has its lower end connected to a tool, such as a jigger tool, which is to be moved in an elliptical path. In making oval dinnerware, such as platters, the tool should move in a path that will jigger plastic clay on an oval mold supported below the tool. The shaft just mentioned is mounted in a bearing which is supported for reciprocation in a substantially straight line along the major axis of the elliptical path. Although the bearing support may be a straight track, it is preferred to use horizontal links pivotally connected on vertical axes to lateral projections of the bearing at diametrically opposite points. The links extend tanentially of the bearing away from it in opposite directions, and their outer ends are pivotally connected on vertical axes to a supporting frame. An upper vertical shaft has its lower end offset laterally of the upper end of the lower shaft, and the adjacent ends of the two shafts are rigidly, but preferably adjustably, connected together so that, in effect, a crank is formed. The upper shaft is mounted in a bearing which is supported for reciprocation in a substantially straight line along the minor axis of the elliptical path. The supporting means for this bearing preferably includes another pair of horizontal links extending substantially at right angles to the first pair. Means is provided for rotating one of the two connected shafts, most suitably the upper shaft which in turn rotates the lower shaft. Due to the mounting of the two bearings, the crank-like connection of the two shafts causes the bearings to reciprocate in horizontal straight lines at right angles to each \engaged the mold moves upward and the tool travels around the mold. When the mold is lowered after the jiggering operation has been completed, it automatically disengages the clutch so that the machine stops until the clutch is manually engaged again. The movements of the mold support most suitably are controlled by a rotating cam.

Various parts of this apparatus are described as being vertical or horizontal. This is merely to set forth the positions of the parts relative to one another for ease of description, and is not intended to limit the invention.

The preferred embodiment of the invention is illustrated in the accompanying drawings, in which Fig. 1 is a side View of the J'iggering machine; Fig. 2 is a front view; Fig. 3 is a reduced plan view; Fig. 4 is a View like Fig. 3, except that the jigger tool is shown at right angles to its former positions; and Fig. 5 is a horizontal section taken on the line V-V of Fig. 1.

Referring to the drawings, a base plate I supports on its rear end portion a frame 2 that extends upward and then forward over the base. Mounted, in the upright portion of the frame is an electric motor 3 which is connected by a belt 4 to a pulley 5 rotatably mounted on a horizontal shaft 1 below it. The shaft is journaled in a gear housing 8 mounted on a support 9 near the bottom of the frame. The inner end of the shaft carries a bevel gear I I that meshes with a similar gear l2 on the lower end of a vertical drive shaft 13 that extends up out of the housing and has its upper end journaled in a bearing M in the upper part of the frame. Projecting from the front side of pulley 5 is a sleeve 6 through which shaft! extends. The outer or front end of the sleeve and the corresponding end of shaft I support the two parts [6 and [1, respectively, of a normally disengaged clutch so that the pulley and sleeve can rotate without turning the shaft. The clutch is a conventional clutch, the details of which form no part of this invention. Part [6 is rigidly fastened to sleeve 5, but part H is splined on shaft 1 and is spring pressed toward part [6. Clutch part I! normally is held forward away from the other part by means of a leverv l8 that encircles part I! and has a free end extending away from it. It can be engaged by lifting a lever l8 projecting from one side of it. The outer end of this lever encircles the front end of a rod l9 that is pivotally connected to the upper end of a bent lever 20 supported by a bracket 2| mounted on the base plate. Rod I9 is provided with a lug 22 that engages lever l8 to the lower end of a link 26 whose upper end is pivotally connected to the rear end of an arm 21. The central portion of this arm is mounted on a shaft 28 journaled in bearings 29 mounted in frame 2 above the motor. The arm normally is inclined forward and downward and extends out beneath the projecting upper portion of the frame. The front end of this arm is forked and has a bolt 3| extending transversely through it and through an upright pin 32 disposed in the fork. Mounted on the upper end of the pin is a collar 33 which is held in place by a setscrew 34 so that the collar can be turned or raised and lowered on the pin as .desired. Rigidly mounted on the collar is a supporting member 36 for an oval or elliptical plaster mold 31 on which plastic clay can be jiggered to form a platter or the like. It is most convenient to have the major axis of the mold extend from front to back of the machine.

The rear end of the inclined arm is provided with an upward extension that has a cam follower roller 38 on its upper end. This roller extends up into a deep notch 39 in a cam 4| that is secured to a shaft 42 journaled in bearings 43 mounted on the rear ends of horizontal supporting members 4'4 fastened to the frame. Shaft 42 is turned by a gear 46 mounted thereon and meshing with a worm 41 mounted on Vertical drive shaft I 3. The shape of the cam is such that when it is rotated it forces the roller downward until arm 21 is substantially horizontal, and. then holds in that position until the cam completes a revolution to return the notch to the position where the roller is moved up into it by the weight on the opposite end of the arm. Downward movement of link 26 causes lever 29 to pull lug 22 back through the eye in lever l8. Upward movement of the rear end of arm 21 causes link 26 to lift the rear end of lever 29 and thereby move rod [9 forward to cause lug 22 to push lever l8 ahead for disengaging the clutch so that the drive shaft will stop turning. The cam preferably is so shaped that it quickly moves the mold almost to its uppermost position, and after a suitable dwell it raises the mold slightly higher for a moment, and then allows it to fall away a few thousandths of an inch before lowering it.

While the mold 31 is held in horizontal position by arm 21, a batt of plastic clay thereon is jiggered by means of a profile tool 5| directly above it. This tool is adjustably connected by bolts 52 to a slotted arm 53 projecting laterally from the lower end of a short vertical shaft 54 journaled in a bearing 56. The center portion of the hearing has a pair of arms 51 projecting horizontally from it in opposite directions with their outer ends pivotally connected by vertical pins 58 to the inner ends of a pair of horizontal links 59. These links extend in opposite directions from the sides of the arms and have their outer ends Divotally connected by vertical pins 6] to a pair of parallel horizontal side members 62 mounted in the forward upper portion of the frame, When the coniii) ter of shaft 54 is over the center of the mold, as shown in Fig. 4, these two links extend parallel to each other with their inner ends preferably passing each other. Bearing 56 is supported by these links so that it can be swung back and forth lengthwise of the mold in a substantially straight line for a considerable distance, but it is prevented by the links from moving transversely of the machine.

The upper end of shaft 54 is rigidly connected to one end of a crank arm 66 that is provided with a rotatable horizontal adjusting screw 61 along which I put 68 travels when the screw is turned. The nut is rigidly mounted on the lower end of an upper vertical shaft 69 that is journaled in an upper bearing H. Like the lower bearing, this one is provided with diameterically opposite arms 12 which are pivotally connected by vertical pins 13 to the inner ends of a pair of horizontal links 14. These arms are disposed at substantially right angles to arms 51 of the lower bearing, and the upper links likewise are substantially at right an les to the lower links. Therefore, the outer ends of the upper links are pivotally connected by vertical pins 18 to front and rear cross members 11 supported in the frame above side members 62. Consequently, the upper hearing, which is supported by the upper links, can swing cross ways of the machine in a substantially straight line but can not move in any other direction. It will be seen that the two bearings 56 and H can reciprotate in horizontal straight lines at right angles to each other. Mounted on the upper end of upper shaft 69 is a pulley 8| that is driven by a belt 82 and a pulley 83 from the upper end of vertical drive shaft 13. The belt has enough elasticity to permit the front pulley to move transversely of the machine in a straight line.

The upper and lower shafts 69 and 54 and the connecting arm 66 serve as a crank which is rotated by upper belt .82. As the lower shaft is rotated by the upper one, it rotates the jigger tool, but it simultaneously carries the tool in an elliptical path because the crank arm 66 reciprocates the lower shaft lengthwise of the mold due to the facts that upper links 14 keep the upper shaft from moving in that direction and that movement of the lower shaft transversely of the mold is prevented by the lower links 59. As the crank arm prevents the two shafts from rotating on the same axis and as the lower shaft can only move forward and backward, it follows that the crank arm reciprocates the upper shaft transversely of the mold at the same time that the lower shaft moves lengthwise of i To jig er a larger oval of the same shape, tool 5| is merely adjusted outward on arm 53. If it is desired to lengthen the major axis of the elliptical path without changing its minor axis, adjusting screw 61 is turned to move lower shaft 54 farther away from the upper shaft, thereby increasing the distance that the tool is moved forward and backward without affecting the length of its reciprocation c'rossways.

In operation, a mold with a batt of clay on it is placed on supporting member 35 which is formed for holding the mold in a predetermined position. Foot pedal 25 then is depressed to cause the motor to be operatively connected to drive shaft l3. Rotation of the drive shaft causes cam 4'! to depress inclined arm 21 and thereby raise the mold to horizontalpositionbelow thejiggeredtool. Simultaneously, the drive shaft rotates the crank that supports and drives the tool. The clay on the mold therefore is jiggered until the cam notch 39 allows the mold to descend. Water can be sprayed on the clay during jiggering. As the mold descends, the rising rear end of arm 21 causes the motor to be disconnected from the drive shaft, so that the jigger tool stops. ware on it is removed from the machine and another mold with a batt on it is placed on supporting member 36. The foot pedal is depressed again to repeat the cycle. Scrap from the jigger clay falls into a large chute 86 from which it can slide into a suitable collection receptacle.

If at any time it is desired to jigger circular ware with this machine, screw 61 can be turned to move lower shaft 54 inward into axial alignment with upper shaft 65. The two shafts'then will rotate on the same vertical axis and neither one will be able to move laterally.

According to the provisions of the patent statutes, I have explained the principle of my invention and have illustrated and described what I now consider to represent its best embodiment, However, I desire to have it understood that, within the scope of the appended claims, the invention may be practiced otherwise than as specifically illustrated and described.

I claim:

A machine for jiggering oval dinnerware, comprising a support for an oval mold, a lower vertical shaft about the central portion of said support, a bearing for the shaft, means supportin the bearing for reciprocation in a substantially straight line lengthwise of the mold, a jigger tool mounted on the lower end of the shaft, an upper vertical shaft having its lower end disposed adjacent one side of the upper end of the lower shaft, a connecting member rigidly connectly said adjacent ends of the two shafts, a bearing for the upper shaft, means supporting the last-mentioned bearing for reciprocation in a substantially straight line at right angles to said first-mentioned line, and means for rotating one of said shafts so that as the lower shaft rotates it will simultaneously be reciprocated by said connecting member along said first-mentioned straight line to carry said tool in an elliptical path.

2. A machine for jiggering oval dinnerware, comprising a support for an oval mold, a lower vertical shaft above the central portion of said support, a bearing for the shaft, means supporting the bearing for reciprocation in a substantially straight line lengthwise of the mold, a jigger tool mounted on the lower end of the shaft, an upper vertical shaft having its lower end disposed adjacent one side of the upper end of the lower shaft, an adjustable connection rigidly connecting said adjacent ends of the two shafts but allowing them to be adjusted laterally relative to each other, a bearing for the upper shaft, means supporting the last-mentioned bearing for reciprocation in a substantially straight line at right angles to said first-mentioned. line, and means for rotating one of said shafts so that as the lower shaft rotates it will simultaneously be reciprocated by said connecting member along said first-mentioned straight line to carry said tool in an elliptical path.

3. A machine for jiggering oval dinnerware comprising a support for an oval mold, a lower vertical shaft above the central portion of said support, a bearing for the shaft, means supporting the bearing for reciprocation in a substantially straight line lengthwise of the mold, a jigger tool mounted on the lower end of the shaft, an upper vertical shaft having its lower end disposed ad- The mold with the jigger oval I jacent one side of the upper end of the lower shaft, a crank arm projecting laterally from'one of said adjacent ends of the two shafts and rigidly connected to the other shaft, a bearing for the upper shaft, means supporting the last-mentioned bearing for reciprocation in a substantially straight line at right angles to said first-mentioned line, and means for rotating theupper shaft so that the lower shaft will be rotated by it and simultaneously reciprocated by said crank arm along said first-mentioned straight line to carry said tool in an elliptical path.

4. A machine for jiggering oval dinnerware comprising a support for an oval mold, a lower vertical shaft above the central portion of said support, a bearing for the shaft, means supporting the bearing for reciprocation in a substantially straight line lengthwise of the mold, a jigger tool mounted on the lower end of the shaft, an upper vertical shaft having its lower end disposed adjacent one side of the upper end of the lower shaft, a crank arm projecting laterally from one of said adjacent ends of the two shafts, means rigidly connected to the other shaft and adjustable along the crank arm, a bearing for the upper shaft, means supporting the last-mentioned bearing for reciprocation in a substantially straight line at right angles to said first-mentioned line, and means for rotating the upper shaft so that the lower shaft will be rotated by it and simultaneously reciprocated by said crank arm along said first-mentioned straight line to carry said tool in an elliptical path.

5. A machine for jiggering oval dinnerware, comprising a support for an oval mold, a lower vertical shaft above the central portion of said support, a bearing for the shaft, means supporting the bearing for reciprocation in a substantially straight line lengthwise of the mold, a

jigger tool mounted on the lower end of the shaft, an upper vertical shaft having its lower end disposed adjacent one side of the upper end of the lower shaft, a connecting member rigidly connecting said adjacent ends of the two shafts, a bearing for the upper shaft, means supporting the last-mentioned bearing for reciprocation in a substantially straight line at right angles to said first-mentioned line, a pulley rigidly mounted on the upper end of the upper shaft, a vertical drive shaft, a pulley rigidly mounted on the drive shaft, and a belt connecting said pulleys for driving said upper shaft.

6. A machine for jiggering oval dinnerware, comprising a support for an oval mold, a lower vertical shaft above the central portion of said support, a bearing for the shaft, means supporting the bearing for reciprocation in a substantially straight line lengthwise of the mold, a jigger tool mounted on the lower end of the shaft, an upper vertical shaft having its lower end disposed adjacent one side of the upper end of the lower shaft, a connecting member rigidly connecting said adjacent ends of the two shafts, a bearing for the upper shaft, means supporting the lastmentioned bearing for reciprocation in a substantially straight line at right angles to said first-mentioned line, means for rotating one of said shafts so that as the lower shaft rotates it will simultaneously be reciprocated by said connecting member along said first-mentioned straight line to carry said tool in an elliptical path, and means for periodically raising said mold support to a position adjacent the jigger tool.

'7. A machine for jiggering oval dinnerware, comprising a support for an oval mold, a lower werticel .shaft above (the nentral portion of esaid. :support, a;b.earingzfor:the shaft, tmeans supportiing 'tthe 'Joearing for reoiprocation-ina substanifslal'lysstraight;lineilengthwise ofthe mold, a J'ig er ftonlimiounted :on ;the lower end vof the :shaft, an rupperavertical shaft having itsilower-end disposed afliaeentroneside of the upper endof the lower sshaft, :a :connecting :rmember zrigidly connecting :said adjanentcends .dfatheztwo shafts, a "bearing fforxtheiupper shaft,':1neans supporting-the last- :mentioned rhearing :for .reciprocation win a substantially straight lline :at :right angles :to said ifimt-smentionedlinegazpulleyrigidly:.mounted on tthezupper-end .ofrthexuppersshafta ve'rticalrdrive ishaftsa:pulleyrigidlwmounted-on the: drivesshaft, mtheltmonnecting said: pulleys for "drivingsaid Lupmenshaf-t,z.-and: arcamrdriven from-ssaid drive shaft for periddicallytraisingisaidimold support :toa-po- :eition adjacent the 'jigger tool.

i8..A;=machine for iiggering oval dinnerware,

mil-prising a ,:support for ran oval mold, ;a Flower wertical ashaft :above :the :central; portion of said :a hearing :ior ;the :shaft, means supportiing tthe ahearing ifor reciprocation in a "substan- Itially straight linezlengthwise ofithermold, :a jigi821 ttoohmountedon -:the :lower :end of the shaft, ranumperwvertical shaft having its lower end dismused adjacent one; side :oflthe upper end of the llowersshaft, a connectingime'mber rigidly con- ;neeting ssaid adjacent ends of :the two shafts, a thearing for the upper sshaft, tmeans, supporting tthe last-mentioned bearing for reciprocation in a substantially straightlinecatdright anglestto said ,first mentionedline; a ulleyirigidly-mounted on ithetupperrend nf thempperfshaft,avertical drive rshaftswpulleysrigidly-mountedon the drive-shaft, ea'heltzconnecting said pulleys for driving :said upper :shaft, continuously -;operating driving :means, :a :manually :operable r:clutch for :operattively connecting said ,drivingmmeans with said drive rshaft, a cam driven from :said drive :shaft ifor raising and flowering, said tmold support, and :meansoperable-when the moldisupportvis' lowered .forv.disengaging;said-clutch.

5.9.A zmachine forzji gering oval 'dinnerware, ,;4

comprisin :a supp rfor ran oval mold, a: norrmall-y inclinedarockerarm: pivotally supportedrbettweemits :ends onuarhorizontal; axis with its-lower rend supporting the mold support, means for periodically moving -the-opposite: end of thearm :vdown'cto liftnthermoldsupportztohorizontal position, a lower vertical shaft above thegcentral por- LtriOIFOfithG mold support,;a boaringvfortheshaft, rmeans supporting the -bearing ;for ,-reciprocation :in::a substantial;ly; straightline lengthwise of the .moldua ji -er tool mounted onzthe lower end .of athe.--shaft,- an up er vertical shafthaving its =low,er (end disposed adjacentr-one side of :the uppergend "9 1 'i fi t, :a (connecting member rigidly wonnecting saidadjacent end of 1 the?.two shafts, i560 taabearing: for \the upper; shaft, :means -supporting :the last-mentioned bearing :for reciprocation -,in :a rsubstantiall stra:ight line at :right :angles :.:to .said tfirstementioned line, and means for rotatonezof sa-idshafts so that-as the lowers-shaft lTBtatQS it will simultaneous- 1y be: reciprocated :by ssaid nconnecting .r member along --said :firstemendamned-straight line to 'c-arr-ysaiditool in-an'elliptireal, path.

1.10..14. @machine for jiggeringovaLdinnerware, 6

aarmgdown to lif.t\the mold supportto operative position, means "for rotating ithe'cam, ailower vertical shaft a, above the central portion rof said -mo1d support, aa-bearingifor the. shaitfimeanssllp :porting :the bearing 1 for reciprocation ,in a ..sub- .stantially .-straight rline lengthwise of athe mold, .a ,jigger .toolimounted on the lower .endof pthe rshaft, .an -.upper vertical shaft having :its flower .end GiSIJOSBCITaQjaQEHt/QHB sideof the upperend (of the Jlower shaft, .a :connecting ,member ,rigidly connecting said. adjacent. endszof the otwo shafts, :arbearing for the upper shaft, means supporting :the =last-smentioned bearing for reciprocation tin a substantiallystraight line atright angles tosaid ,15 first-mentioned line, and means. for rotatingflne ,of said 1 shafts soythat as the lower. shaft, rotates it will simultaneously be reciprocated by said connecting member along ,said first-mentioned straight ,1ine.to.;car1 ;y said tool in an elliptical (path.

11. (A machine for ,jiggering oval .dinnenware, comprising a supportfor an ovahmold, anormally inclined rocker arm pivotallycsupported abetween .its-ends-on ahorizontal axis with its lower ,end supporting thermoldsupport, .a-rotatableroam iur periodically moving the opposite end oftthearm .down..to.1ift=the moldrs lpport topperative posi- ..tion, a, lower .vertical haft above ,the central poi:- ;tion'of saidmoldsupportfla bearingforthe shaft, means supporting the bearing .tfor reciprocation ina substantially. straightdine lengthwise-9f ,the

.moid, .ap'ig er .tool mounted on :the lower end -;of ,the.shaft,= an nppenverticalshaft,having itslower endrdisposedi adiacentpne side of the upper end of tliellowershaft: aroonnecting .member rigidly connecting saidadiacentends. of the ,two shafts,

,.a bearing for .the upper. shaft,..means supporting .the last-.mentioned .bearing for reciprocation "in alsilbstantially. stra ghtline, at right angles to said .firstementioned line, meansfor, rotatingthe upper .shaftsoihat theiowershaft will be rotated by .it and simultaneously reci rocated, bytsaid. con- ;necting member along :said first-mentioned .straight .line tto -.carry said ,tool .in an :elliptical pathfayertical drive shaf t, gears operatively .connecting the drive shaft with the cam, continuouslycoperating driving means, amanually oper- .-able clutch for operatively: connecting; said driving means with said drive-,shaft,;and meanswactu- .atedJoy said -:arm when it tilts backto-inclined ,position for :releasing said clutch, whereby ,said

i drive shaft willstop rotating.

512.,A machine for jiggering oval dinner-ware, comprising-a support for an oval -mold,.aglower vertical. shaft above the ,central 'portionof =said support, a bearing ,for theishaft having lateral ,proiections, :a pair of horizontal links pivotally connected on vertical axes' to -said projections on oppositesidesaof thev shaftand-extending tangentiallyof the bearing away from it .in'copposite directions, means pivotally supporting -.the outer ends of the ,linlrs a ,jigger tool .mounted on ,the

Flower r end of the shaft, an upper .vertical .shaft havingits lowerv end disposed adjacent one side -of theruper endofthelower, shaft, "a connecting member rigidly a connecting said adj aeent ends of the two shafts, a bearing for ,'.the-up per: shaft having ,lateral -projections, la pair -of horizontal .links pivotally' connectedon vertical axes -.to said last-mentioned projections and extending {tangentiallypf ,the;sec0nd bearing away zfrom it =in Opposite directions at-substantiallyright angles ,to said first-mentioned links, Emeans ,ypivotally ,supporting ,the outer ends of .the sseeond ;:pair of Jinks, and :means in)! rrotetingr one -;of l-saidrshafts so that as the lower shaft and jigger tool are rotated they will simultaneously be carried in an elliptical path. i

13. A machine for jiggering oval dinnerware, comprising a support for an oval mold, a lower vertical shaft above the central portion of said support, a bearing for the shaft having a pair of arms projecting laterally from it in opposite directions, horizontal links pivotally connected on vertical axes to the outer ends of the arms and extending laterally in opposite directions away from the sides of the arms, means pivotally supporting the outer ends of the links, a jigger tool mounted on the lower end of the shaft, an upper vertical shaft having its lower end disposed adjacent one side of the upper end of the lower shaft, a crank arm extending laterally from one of said adjacent ends of the two shafts and being rigidly connected to the other shaft, a bearing for the upper shaft having a pair of arms projecting laterally from it in opposite directions at substantially right angles to said first-mentioned arms, horizontal links pivotally connected on vertical axes to the outer ends of the lastmentioned arms and extending laterally in opposite directions away from the sides of those arms, means pivotally supporting the outer ends of the last-mentioned links, and means for rotating the upper shaft so that the lower shaft and jigger tool will be rotated and simultaneously carried in an elliptical path.

14. A machine for jiggering oval dinnerware,

comprising a support for an oval mold, a lower vertical shaft above the central portion of said support, a bearing for the shaft having a pair of arms projecting laterally from it in opposite directions, horizontal links pivotally connected on vertical axes to the outer ends of the arms and extending laterally in opposite directions away from the sides of the arms, means pivotally supporting the outer ends of the links, a jigger tool mounted on the lower end of the shaft, an upper vertical shaft having its lower end disposed adjacent one side of the upper end of the lower shaft, a crank arm extending laterally from one of said adjacent ends of the two shafts, means rigidly connected to the other shaft and adjustable along the crank arm, a bearing for the upper shaft having a pair of arms project ing laterally from it in opposite directions at substantially right angles to said first-mentioned arms, horizontal links pivotally connected on vertical axes to the outer ends of the last-mentioned arms and extending laterally in opposite directions away from the sides of those arms, means pivotally supporting the outer ends of the last-mentioned links, and means for rotating the upper shaft so that the lower shaft and jigger tool will be rotated and simultaneously carried in an elliptical path.

RALPH F. MALARKEY.

No references cited.

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