US1513113A - Wood-turning machine - Google Patents

Description

' M. B. JACKSON WOOD TURNING MACHINE Filed DC. 22, i922 4 Sheets-Sheet l l El EN milnmwmlv mmm., V I l E HJM/3A.

ont, 2s. 1924. 1,513,113

` M. B. JACKSON WOOD TURNING MACHINE Filed ne. 22, 192,2 4 sheets-sneet 2 IIHIIHIIIHMH NIIIIHHHH aE-Lof lmljmllll INVENTUF.

oci. 2s 1924.

M. B. JACKSON WOOD TURNING MACHINE Filed Dec. 22, 1922i 4 sheets-sheet s /:1:: I .aww 1..| :Ul A n r W dm ,FL M/ mmm .v L mvoOeL I... .l Q a, 115:; :h su In. A '.HI u@ i@ ..m2\ O O :Nv ma 1,513,113 0t- 28 924 M. B. JAcKsoN WOOD TURNING MACHINE Filed De'c. 22, 1922 4 sheets-Sheet 4 a #a 53 im? 5.. s 'al' Him l 'g \,m """m' l l 845m Q u g 3 m nf ll a H @351% INVENTIJR..

I I WB..- ll l @2f- Patented ct. 28, i924.

STATES PATENT GFFICE.

MAUNsELL B. JACKSON, or TORONTO, ONTARIO, CANADA, AssIGNoR 0E' THIRTY- THREE PER CENT .Tol THOMAS CAMERON DATE, THIETY-THEEE PER CENT To EDWARD MCMAHON. TWENTY-NINE PEN `CENT To :PHILIP D. LYoNs, AND EIVE PER CENT TO ALEXANDER PIEBIPONT @EEOC-HE, ALL OF OTTAWA, ONTARIO,

CANADA.

Application filed December 22, 1922. Serial No. 608,577.

To @ZZ whom t may concern.:

Be. it known that I, MAUNSELL B. JACK- soN, of the city of Toronto, in the county of York, Province of Ontario, Canada., a subject of the King of Great Britain, have invented certain new and useful Improvements in food-Turning Machines, of which the following is a specification.

This invention relates to machines for turning handles such as used for brooms, mops, hoes and the like, and my obj ect is to devise a machine which will automatically turn out` finished handles shaped as may be desired, attend-ance being required merely for adjustments and to keep the feed magazine constantly supplied' with sticks to be turned.

l attain the object of my invention by means of the constructions hereinafter described and illustrated in the accompanying drawings in which* F i g. l is a side elevation, partly in section, of part of the apparatus embodying my iuvention Fig. l a side elevation of the balance of the, apparatus;

F 2 a plan View of Fig. l;

Fig. 2 a plan view of Fig. la;

Fig. 3 a section on the line 3-3 looking towards the front;

Fig. -t section on the 'line 4-4 looking towards the rear; y

Fig. a longitudinal section of the rotary vgui de g A. ik magazine feeding device adapted to feed forwardly one stick at a time, the .Sr-#ks beu-is held, freie retenes as lone? es they are under the control of the feeding mechanism.

B. Guides through which lthe sticks are fed and in which they are rotatable and through which they are fed by the pressure of a following stick being ejected from the feeding mechanism.

C. A rotary guide adapted to receive and rotate a forwardly fed stick, this guide being spaced from the feed mechanism a sufcient distance for each stick to be free of the control of the feed mechanism before entering the rotary guide.

D. Means for roughly turning the stick and forming a thread thereon.

E. A stationary internally threaded guide adapted to engage the thread of the'stick and thus feed the stick forward as it is rotated by the rotary guide.

F. Means for giving a finishing cut to the f surface of the stick and shaping contour of rthe finished stick without interfering with above the top of the table through openings therein. One of these rollers is located in front kof the forward guide et and with it co-operates a feed idler roll 7, the spindle of which journalled in boxes S which are spring-pressed by means of adjustable spring` mechanism 9 of a type commonly employed for such purposes. The spindles of the feed rollers are driven as hereinafter specifically describe-d.

To facilitate the feeding forward of the bottom stick by means of the feed rollers, it is important that the. weight of the superimposed sticks be taken off the lowermost stick. This is effected through the medium of the dogs 10 which are secured to a shaft 11 journalled on the guides 3. These dogs depend from the shaft and each is formed with a laterally directed tooth 12 at its end, which teeth engage in the side of the next to lowermost stick as seen particularly in Fig. 3. F rom the: position of the dogs relative to the shaft, it follows that when the dog is rocked towards the sticks that it eX- ercises ai slight lifting tendency on the nextto lowermost stick, which serves to prevent it obstructing theJ forward movement of the lowermost stick. j

The shaft is actuated with the following mechanism. A rock arm 13 is secured to the vshaft 11 and has a pin 14 secured to its lower end, which engages in a jaw 15 formed on an upwardly extending rock arm 16 secured to the spindle 17 journalle'd on the table 2. To this spindle is secured a rock arm 18 to which is fulcrumed a depending arm 19, the lower end of which engages a groove in the periphery of the wheel 20 secured to the shaft 21 journalled longitudinally of the base of the machine.

At the bottom of the groove is located a projection 22, which is adapted to engage in a notch 23 formedin the side of the arm (see Fig. 3). It is evident that as the wheel 20 rotates, the yprojection will engage vthe not-ch once in each revolution and impart apull to the arm 19, thereafter disengaging itself from the notch and leaving` the arm again free. Y

A coil spring 24 `fitted in a recess in the table tends to raise the rock arm 18. The arm 19 is yieldingly held in engagement with the wheel 2O by means of a coil spring` 102Y suitably connected with the arm and with a hook 103 or other convenient means for connecting it to the frame of the apparatus.

The result of the construction just described is that 'at periodic intervals the dogs 10 are disengaged after the lowermost sti-ck has been withdrawn, and the whole pile of superin'cumbent sticks allowed to dro-p, the next to lowermost stick Vbecoming then lowermost.

After leaving the forward feed rollers of the feed mechanism the stick passes through guides 25, each formed as a cylindrical thimble 26 of suitable material and of a diameter slightly greater than the diagonal of the stick. One'of these thimbles is snpported on the end of the table of the feed mechanism and two others by standards 27 secured to the base 1 of the machine. These guides direct the stick to a rotary tubular guide 28, which is suitably journalled, preferably by means of ball bearings, on a frame 29 secured to the base 1.

To this tubular guide is secured a pulley 30, by means of which it is rotated. The construction of this guide is of great importance7 as when the machine is in operation it must yrotate at a speed of .approximately 1809 revolutions per minute, and it must be possible while it is rotating at this speed for a non-rotating stick of the same section to enter it and be engaged thereby without damage to the end of the stick.

To secure a proper drive of the stick, the bore of the driving part of this rotary guide is made of square cross section with approximately the same diameter as the diameter4 of the stick and the sides of the square are substantially complete, that is, not materially lessened in area or broken up by gaps.

To guide the stick into engagement with the square bore l provide the rotary guidel with a mouth 31 which at the rim for the Inaj or part of its internal circumference is of a diameter approximately that of the diagonal of the sticlnbut not less than such diag- D onal. Internally this mouth is formed with flats 32 of less width than the sides' of the bore and in alignment ytherewith adjacent each angle. From the side of each fiat intermediate the angles of the bore the interior of the mouthI slopes sharply to meetv the inner surface of the mouth of the greatest diameter. To further facilitate the entry of the rectangular end of the stick without damage, l nd it desirable to bevel off the outer ends of the met-al forming the flats 32, thus increasing` the length of veach of the arcs 31n whose radius is substantially equal to half the diagonal of the cross section of the stick.

The result Vof this construction is that lthere is very little chance ofthe end of a square sti-ck striking at the entrance of the mouth where it is likely to stick, and experience shows that if it does, the forward feed of the stick is so slow relative to the rate of rotary movement of the guide that the corners of the end of the stick clear themselves before damage can be done. The diagonal of the stick passes readily through the open end of the mouth betweenV the points lj-a., and is thereafter guided into engagement with the flats 32 which start the stick in rotation and feed it accurately into the square bore of the guide. This square bore adequately sup-ports the stick on all sides and, without injury to it, drives it past the turning mechanism located at the forward side of the rotary guide. Y

The roughing cutter 33 is secured to a izo rspindle 34 journalled` in a frame 35 which `is. hinged at 36 on thev frame 29. At the opposite end of the frame is pivotally connected the upper end of a rod 37 whichexytends down to a lug 38v on the frame and is adjustable relative thereto by means of the nuts 239" threaded on the lower end ofthe rod. T he spindle is thus adjustable to and from the axis of the rotary guide. On .the same spindle as, and preferably behind, the ronghing cutter is secu-red the Vthreading cutter 40, `which cuts a slight thread below the roughly turned periphery of the stick. From the rotary guide the threaded end of the stick passes to the fixed threaded guide l1, the thread. of which engages in the thread `of the stick and thus causes a forward feed. of the stick as long as it is being rotated This threaded guide is preferably secured in a frame 42 secured tothe base 1.

After `passing through the threaded guide, the roughly turned stick enters the guide 43 having a smooth cylindrical inside surface. This guide is split as shown, the upper half being engaged by a cap 44 which is spring pressed aga-inst Vthe upper part of the guide. For this purpose coil springs 4-'5 are provided which engage the bottoms of recesses formed in the frame 46 secured to the base 1 and nuts 47 threaded on the lower ends of rods 48 secured to the cap 44. The pressure of the guide on the stick may thus be accurately regulated, so that the stick be sufiiciently firmly and closely held and yet the possibility of amming` avoided. To facilitate the feeding of the stick through the threaded guide 41 and the guide 43 I connect the oil supply7 pipes 41a and 43a respectively therewith whereby oil may be fed to the surface of the stick.

At this point the finishing cut is given to the surface of the stick by means of a rotary cutter 49. This critter is connected to a spindle 5() journalled on a frame 51 hinged at 52 on a bracket secured to the base 1. At its other end this frame is hingedly connected with a rod 54 which is adjustable in length 'by means of a turnbuckle 55 of ordinary construction. The lower end of this rod is connected with a rock arm 56 eX- tendiug transversely of the machine and fulcrunied at 57 on the base thereof. The other end of this rock arm is provided with a suitable anti-friction roller adapted to engage a cam disk 58 secured to the shaft 21 which shaftis driven as hereinafter described.

A pair of coil springs 60 are employed tending to lift the frame 51 and thus to maintain the end of the rock arm 56 in engagement with the cam disk. These springs engage collars 61 secured on rods 62 which are connected at their upper ends with the frame 51 and at their lower ends pass through lugs 63 formed on or secured tothe provided kpositioning the slide on the ring 76. pins Vpermit the slide to reciprocate iu the base 1V of the machine. Sleeves 64 are preferably tted between the lugs and the lower ends of the springs, and nuts 65 are threaded 0n the lower endsof the rods'to limit the upward ymovement of the rods. Each spring isy preferably formedy in parts separated by a washer to. facilitate adjustment by the replacement of any one part by a longer or shorter part. From this construction it is evidentthat through the rotation of the* cam 58 vthe rotary cutter 49 may be slightly raised or lowered at predetermined intervals -so as toshape the turned stick as may be desired. As `the cutters wear down, it will usually be necessary to fit sleeves 64 of a different length in order tof maintain the tension ofthe spring substantially `the same. lt will also be vnecessary to adjust thek turnbuokle 55.

TheV stick, after final turning, enters a yguide 66 which is supported by a frame 67 secured to the base of the machine and which also carries the means for effecting the necessary pull to withdraw the sticks from the machine after they have passed the:

face of the turned stick. The slides are also rotarily adjustable in their guides so that ythe angles of these rollers to the axis of the stick maybe adjusted as necessary.

The following means are provided to effect the adjustments desired. Within each tubular slide 69 is located .a follower 71 which engages lugs 72formed on the inner wall of the slide. `A coil spring 7 3 engages this follower a-nd also a cross bar 74, which by means of the studs f5 is secured to a ring 76 secured to the guide by means of bolts 77 passing through slots formed inthe ring. The ring may thus be rotarily adjusted and clamped as adjusted by means` of the bolts. The upper end of each tubular slide 69 is with outwardly directed lugs through which pass the dowel pins 114 for The ring, but v.do not allow any turning movement of the former relative to the latter. The angle ofthe axis of each roller to the axis of the stick passing between the rollers is thus readily adjusted to vary the rate of pull on the stick. The rollers, from the arrangement described, are also capable of recurved. v `These slides are `spring pressed so that the friction rollers 70 yieldingly engage the'sur'` ,izo

silienrly yielding to any slight inequalities inthe stick, and the pressure may be kaccurately yregulated by means of an adjusting spring 73.

It is desirable to provide means for limiting the inward movement of each roller, and

for throwing the rollers out of action when it is necessary to pull a stick outfof the machine by hand. For this purpose I provide the cam. disk 80 which is provided with a separate cam engaging each slide 69. By rotating this cam the extent of inward movementof the rollers is predetermined and all of them may beV instantly thrown out of action when desired. The advantage of limiting the inward movement is that the rollers may thus be held out of engagement with the shaped part of the handle, which is reduced in diameter, the handle tapering from its full diameter. As the shaped portion of the handle leads, it passes the rollers before the feeding of the stick by the action of the rotary guide 28 and the guide 41 ceases.

This cam disk is secured to the sleeve 104 which is j ournalled in the frame 67 and forms aguide for the stick. To the outer end of this sleeve is secured a lever 105. This lever is provided with a pin 106 which is ladapted to engage the shoulder 107 on the frame and thus prevent the cam disk 80 being rotated too far when the rollers 70 are being thrown out of their relative position. Their inward movement is limited by a releas'able latch 108 which comprises a short lever pivoted intermediate its ends and connected with a rod 109 extending outwardly through the handle of the lever 105 and operable by pressure of the hand to lift the latch. The latch is adapted to engage over a lug 110 formed at one end of the arc-shaped stop 111 secured to the frame by means of a bolt 112 passing through a slot in the stop. The position o-f the lug 110 is thus readily set. A projection 113 on the lever engages the opposite side of the lug 110 so that when the latch is engaged the lever handle is held from motion in either direction. The stop 111 is readily adjustable by means of the bolt 112 so that the cam may be adjusted to permit the rollers 70 to just come to a suitable position to properly engage the stick passing between them.

vAfter passing the friction rollers 70, the

stick is engaged by apparatus designed to' rotate it witho-ut interfering in any way with its forward feed. This device comprises a hollow spindle 81 forming a guide for the stick and suitably journalled in the frame 82 secured to the base 1, and provided with the drive pulley 83. To this spindle at each end is secured a bracket 811, at opposite sides of which are= journalled arms 85 by means of the pivot screws 115. At the inner end of each arm is ournalled a grooved roller 86 by means of a pin 116 passing through a transverse arc-shaped slot (see Fig. 1) and the outer end of each arm is formed with ia weight 87. Thus, under the influence of centrifugal action, the rollers are forced inwardly while the device is in rotation. The instant, however, rotation ceases, the grip of the rollers on the stick ceases so that if necessary the stick is readily withdrawn by hand.

The roughing cutter 33 and threading' cutter 10 are driven by means of the pulley 88 secured to the spindle 34. The finishing cutter 19 is driven by a pulley 89 secured to its spindle 50. These pulleys are driven from a suitable line shaft. The feeding mechanism is driven by means of a pulley 90 secured to the spindle of the forward feed roller 6. This pulley is driven independently of the pulleys 30, 88 and 89 so that the feed may be readily stopped independently of the turning mechanism.

The shaft 21 is driven by a gear train 91 from the shaft 92 suitably ournalled parallel to the shaft 21. This shaft 92 carries a pulley 93 driven by a suitable belt from the pulley 92 secured tothe rotary guide 28.

The intermediate and forward feed rollers 6 are driven in the following manner. On the spindle of the forward feed roller 6 is secured a sprocket wheel 98. On the spindle of the intermediate feed roller is rvsecured a sprocket wheel 99, these two sprocket wheels meshing with a suitable sprocket chain. On the spindle of the intermediate feed roller is also secured a sprocket wheel 100 which, by means of a suitable sprocket chain, drives a sprocket wheel 101 secured to the spindle of the rearward feed roller 6.

It is sometimes desirable to stop the feed of the sticks while the shafts of the machine are still running. For this p-urpose I provvide an eccentric 95 suitably journalled on the frame of the machine and adapted to engage the depending larm 19. With this eccentric is connected the handle 96 by means of which it may be rotated to swing the arm to and from its position of cooperation with the wheel 20. Normally the handle 96 rests on the projection 97 when the arm is in its co-operative position. It will be understood, of course, that suitable ball or roller bearings will be employed wherever necessary, but such features form no part of the present invention.

YWhat I claim as my invention is Y 1. In a wood turning machine, pulling mechanism for a turned stick comprising a guide for the stick; a plurality of angularly set' idle friction rollers adapted to engage the periphery of the stick; and rotary means frictionally engaging the stick to turn the saine while permitting its longitudinal motion.

i2. In a wood turning machine, pulling mechanism for a turned stick comprising a guide for the stick; a plurality of angularly set idlefriction rollers adapted to engage the periphery of lthe stick; rotary means frictionally engaging the stick to turn `the same while permitting its longi tudinal motion' comprising a hollow sleeve suitably journalled; oppositely disposed arms pivoted on the sleeve; intermediate of their ends, grooved rollers journalled on corresponding ends of the arms, and a weight at the end of each arm tending by centrifugal action to press the rollers against a stick passing between them,

3. In a wood turning machine, pulling mechanism for a turned stick comprising a guide for the stick; a plurality of angularly set idle friction rollers adapted to engage the periphery of 'the stick; means for ad justing the angle of said rollers relative to the stick; and rotary means frictionally engaging the stick to turn the same while permitting its longitudinal motion.

l. In a Wood turning machine, pulling mechanism for a turned stick comprising a guide for the stick; a plurality of angularly set idle friction rollers adapted to engage the periphery of the. stick; means for adjusting said rollers to and from the stick; and rotary means frictionally engaging the stick to turn the same while permitting its longitudinal motion.

5. In a Wood turning machine, pulling mechanism for a turned stick comprising a guide for the stick; a plurality of angularly set idle friction rollers adapted to engage the periphery of the stick; means for adjust* ing the angle of said rollers relative to the stick; means for adjusting said rollers to and from the stick; and rotary means frictionally engaging the stick to turn the same while permitting its longitudinal mot-ion.

6. In a Wood turning machine, pulling mechanism for a turned stick comprising a; guide for the stick; a plurality of angularly spring-pressed set idle friction rollers adapted to engage the periphery of the stick; and rotary means frictionally engaging the stick to turn the same while permitting its longitudinal motion.

7. In a wood turning machine, pulling mechanism for a turned stick comprising a. guide fory the stick; a frame; three cylindrical guides on said frame at angles of "k to one another; three slides movable in said guides both angularly and longitudinally; friction rollers journalled in said slides; a ring on each guide relative to which the adjacent slide is slidable but non-rotatV able; means for adjusting the ring to angularly adjust the slide in the guide; and an abutment carried by the ring and a spring acting against the abutment and the slide. f

8. In a wood turning machine, a rotary guide adapted to receive and rotate a forwardly fed stick, said guide being formed with a. square bore and a substantially cylindrical mouth formed with at least two flats each of less Width than the sides of the here and in alinement with two opposite` sides of said bore.

9. In a wood turning machine, a rotary guide adapted to receive and rotate a forwardly fed stick, said guide being formed with a square bore and a substantially cylindrical mouth formed with at least two flats each of less width than the sides of the bore and in alinement with two of the sides of the bore adjacent diagonally opposite angles.

l0. In a wood turning machine, a rotary guide adapted to receive and rotate a forwardly fed stick, said guide being formed with a square bore and a substantially cylindrical mouth formed with four flats each of less width than the sides of the bore and in alinement with said sides adjacent eachl angle.

1l. In a Wood turning machine, a rotary guide adapted to receive and rotate a forwardly fed stick, said guide being formed with a. square bore and a substantially cylindrical mouth formed with four flats each of less width than the sides of the bore and in alinement with said sides adjacent each angle, the outer ends of the metal forming the flats being bevelled olf.

l2. In a Wood turning machine, a rotary guide adapted to receive and rotate a forwardly fed stick, said guide being forme-d with a` square bore, and a mouth having a large part of the opening at its outer end of a diameter not less than the length of a diagonal of the cross section of the stick and provided with guides adapted to guide the stick to enter the square bore.

13. In a machine for turning rectangular sticks, the combination of feed mechanism adapted to feed sticks longitudinally; a

rotary guide spaced at least a sticks length from the feed mechanism and adapted to receive and rotate a forwardly fed stick after it is released by the feed mechanism, said mechanism for a turned stick cimprising aV guide for the stick; a. frame; three cylindrical guides on said frame Aat angles of 120 to one another; three slides movable 'in said guides both angularly and .longitudinally; friction rollers journa-lled n said a cam disk adapted when rotated to' press slides; a ring on each guide relative to Which back each slide; and a hand lever for actuatthe adjacent slide is slidable but non-r'oing the cam. 10 tatable; means for adjusting the ring to Signed at Toronto, Canada, this 11th day 5 angularly adjust the slide in the guide; an of December, 1922.

abutment carried by the ring and a sp1-ing acting against the abutment. and the slide; MAUNSELL B. JACKSON.

Images