US1935979A - Machine for doweling heels - Google Patents

Description

Nov. 21, 1933. w 1 HUBBARD, JR 1,935,979

MACHINE FOR DOWELING HEELS INVENTOR ATTORNEYS Nov. 21`, 1933. W. J, HUBBARD, JR 1,935,979

MACHINE FOR DOWELING HEELS Filed Nov. 15, 1952 6 Sheets-Sheet 2 @w A .msm

ATTO RN EYS Nov. 21, 1933. w. J. HUBBARD, JR

MACHINE FO DOWELING HEELS Filed Nov. 15, 1952 6 Sheets-Sheet 3 Nov. 2l, 1933. w. J, HUBBARD, JR

MACHINE FOR DOWELING HEELS Filed Nov. 15. 1932 6 Sheets-Sheet 4 INVENTOR ATTORNEY-'b Nov. 21, 1933.

w. J. HUBBARD, JR 1,935,979

MACHINE FOR DOWELING HEELS Filed NOV. l5. 1932 6 Sheets-Sheet 5 www WM@ 3 W ATTORNEYS Nov. 21, 1933. w 1 HUBBARQ'JR 1,935,979

MACHINE FOR DowELING HEELS Filed Nov, 15. 1952 6 Sheets-Sheet 6 'IIA Fia. l5

Q4] INVENTOEL BY 5k ATTORNEY 5 Patented Nov. 21, 193.3

entre sTATes PATENT ori-*Ice MACHINE Fon DOWELING HEELS 20 Claims. (Cl. 2,9.-35)

This invention relates to a machine for dowelig heels including Ythereby the making of a hole inthe heel for the dowel and the insertion of the dowel ltherein and in certain forms of the inven- 5 tion including .also the making and shaping of theY dowel. v

The purposes of this invention are to provide a machine for doweling heels of the type 'mentioned and which is of new and improved construction, l form and operation; to provide a machine of the type indicated where the heels usually of wood are readily .and lightly placedin. successive heel seats and soon after vheld therein by the heel being engaged with necessary pressure by a co'- operatingV movablerjaw for each heel seat and wherein the successive pairs of heel-holding seats and jaws are progressively and brought to and stoppedat a position where a drilling mechanism is operative to advance and '20 drill a hole in the heel and then be withdrawn therefrom and thereafter to 'have the heel carried hy its said holders to a subsequent position herein called the driving position where the heel is again stopped and operated upon by the dowelinserting mechanism and'to provide in the mae chine mechanism for placing a dowel in line with the hole in the said vheel and then driving said dowel into the hole oi'the heelyand then passing said heel to a subsequent position where the heel seat/and holding jaw are relatively moved so as to release the heel; further to provide in such a machine meansiorreadily and vsecurely mount? ing the several pairs of heel holders so that the heelsplaced therein will .be accurately presented part ci the dowel-insertingmechanism means Vfor forming nietaladowelsof the rightV length and right cross-sectional-,shape andwith the desired holding barbs upon part of the length ofthe dowelsout or a coil of plain round wire by mechesiism for cutting said indefinite length of wire into pieces the length of the-dowel and shaping it in crosssection to the desired non-circular shapel and impressing or formingY upon part of the length of the wire. so cut the desiredburrs or in rotation barbshfor preventing thev dowel coming out of theY Aheel when once driven therein; toprovide-a ma- Vchine'of the type described of such form and with suchen-operation of its'zparts that said machine will fconstantly operate to intermittently advance and stop at the desired positions the heel holders opposite the different loading, drilling and dowel# inserting positions and to have the other'mechanisrn izo-operate therewith soas tov allow for loading the heels, drilling the heels and inserting the dowels when the respective heel holders rare at rest at Vthe diierent positions for 'such operations,i to provide in combination with such machine mechanism -for indicating at each opera- 'tion whether lthe drill is 'still intact so'that the operator can stop the machine if a drill has been broken andv thus avoidthe machine delivering defective vheels and also prevent a he'elthat may have a broken drilltherein from being subjected to the strain or" havingv a dowel vpressed against the hole where the ybroken drill is.

fliig.1 1v is a side elevation of the left hand side ci anw-entire machine embodying this invention. Figq2 is a plan view'I on a larger scalei'than Fig. lof the front two-thirds df the said machine but with lthe front ofthe machine atthe left, the driving and` gearing parts forming the rear third of the machine being omitted.' v Fig. 3 is a side elevation on the saine scale as Fig.2 of said forward two-thirds ofthe machine as seen from the right side ordowe'l-inserting side-of the machine, certain parts being broken away rto more rclearly'show the construction. l' Fig. 4 is .a vside elevation from the right hand side on Va still larger scale of the front end/of the turret shaft and yone pair of heel holders; that is a heel-receiving seat and a movable jaw co-operating therewith and showing a heel in place between said holders; said view also shows thev adjacent part of the cam ring co-operating with said holding jaw. f l Fig..5 is a vertical cross sectional View YOnline 5 5 of Fig. 3 lookingtowards therear of the machine kbut showing only parts immediately beyond said line. f Fig.,6 is a vertical cross sectional view onv line 6 -5 of'Fig. 3 of the dowel-inserting and dowelformingmechariism. ,A

' Fig; 7 is alvertical longitudinal sectional view on an enlarged scale ron line" '7 7 of Fig. 2. A

Fig.8 isa longitudinal sectional view through one formof a woodiheelrwith the hole bored therein. Y Y Y Fig; 9 is a similar view -of another formiof heel with a metal dowel inserted therein. i.

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Fig. 10 is a side View of a dowel, full size, as formed by this machine.

Fig. 11 is a cross sectional view of said dowel on an enlarged scale.

Fig. 12 is a horizontal sectional View mostly on line 12-12 of Fig. 7. j Y

Fig. 13 is a detail horizontal sectional view on line 13--13 of Fig. '7.

Fig. 14 is a detail showing a side elevation of the main Geneva wheels 158 and 161 as seen from the front of the machine.

General construction Referring to the drawings in a more particular description it will be seen that this machine has a framework generally designated by the-numeral 20 having suitable longitudinal, upright and transverse members to provide a lower platform 21, an upper platform or table 22 and various supports for the required bearings of the machine and that the machine consists of this framework, a turret shaft 23 carrying three pairs of heel holders, each pair comprising a heel-receiving seat 24 and a jaw 25 movably mounted relative to its heel-receiving seat and that the turret shaft 23 is mounted and connected so as to be progressively rotated one-third of a revolution by a stepby-step motion followed by a pause so that the several pairs of heel holders carrying therebetween a heel 26 are separately but progressively moved from the loading position where the heel is inserted between the holders to the drilling position where during the pause of said turret shaft and its parts carried thereon a drilling mechanism generally denoted by the numeral 27 and provided with an advanceably rotated drill 28 advances the drill into the wood heel held by the heel holders at that position and then retracts the drill from the hole so bored and that then that pair of heel holders is carried by another one-third rotation of the turret shaft 23 to the opposite or right hand side of the machine to the dowel-inserting position; that when the drill heel is then held at this dowel-inserting position a dowel already provided and in alignment with the hole drilled in the heel is driven Vinto the heel and that after the dowel has been inserted in the heel the pair of heel holders carrying the heel are moved by a one-third rotation of the turret shaft to loading position and that during this last travel of the heel holders the movable jaw 25 has been withdrawn from its tight grip against the heel so that the heel may be readily removed from between the heel holders and is so removed from the heel holders before this pair comes to the loading position and that at the loading position another heel is inserted by hand into the heel-receiving seat 24 and lightly held therein by a spring or similar means but adapted to be tightly held upon the seat by the advancing movement of the jaw 25 which is so advanced by the first part of the motion of the turret shaft and its carried parts fromrthe said holding position.

Heel holders and turret shaft As this machine is organized the turret shaft is mounted in the upper part of the framework in a forward bearing 29, a middle bearing 30 and rear bearing 31 with one end, namely the forward end of the shaft, projecting a considerable 'distance beyond the forward bearing 29. For the purpose of convenience in this description and for the reason that the single operator of the machine ordinarily stands at the end of the machine shown at the right in Fig. l, this end of the machine is called the front end of the machine and the side of the machine shown in elevation in Fig. 1 is called the left side of the machine.

Upon this front projecting end of the turret shaft 23 are mounted the three pairs of oppositely disposed radially arranged heel-*receiving seats 24 and movable jaws 25. As appears particularly from Figs. 1, 2, 3 and 5 the set of heel-receiving seats 24 are mounted in equally spaced radial position in a circle about the turret shaft 23 as by means of a generally triangular shaped forward head 32 being securely fastened to said shaft and being provided with three radially projecting equally spaced strong posts 33. One heel-receiving seat 24 is secured upon leach of these posts in Va similar manner so that a description of one heel-receiving seat and its mounting upon said post will be suflicient. Securely but adjustably secured upon the post 33 there is provided, and placed the clamping bracket 34. This bracket is of the split eye type with the eye of the bracket fitting upon the circular post 33 or adjusted circumferentially in desired adjusted position by tightening the nut 35 on the end of clamping bolt 36. The inner or rear end of this bracket vfrom its right hand end as seen in Fig. 4 is preferably of reduced thickness so as to receive against its opposite sides the spaced anges 37 of plate 38 the inner plain surface of which is the face of the heel-receiving seat as a whole which engages the larger or shoe end 39 of the heel 26. The plate 38 is mounted upon the bracket 34 to rotate to a considerable extent and to be secured so that the face of the plate 38 is at the desired angle required by the particularshape of the heel being loperated upon or the angle at which the dowel is to be placed therein. This is accomplished and the fastening of the plate 38 at the desired angle is accomplished by clamping the nut 40 of the bolt 41 which extends through the flanges 37 of the plate 38 and through the reduced inner end of the bracket 34. Y

"Upon the lower portion of the plate 38 there is provided an adjustably located finger 42 which is spaced from plate 38 and projects upwardly parallel therewith with its upper end engaging the forward surface or breast 43 of the heel. This finger thus forms a stop determining the extent to which the heel 26 will be slipped down upon the face of the plate 38 when the heel is placed in position thereon by the operator. The finger 42 is held in such spaced relation to the plate 38 by means of an apertured block 44 interposed between the plate 38 and the finger 42 and with said three parts clamped together with a bolt 45 going through said parts and engaging a nut 46. Spacing the stop .finger 42 out from the plate 38 gives. a more definite supporty initially for the placing of the heel in place in the heel-receiving seat and avoids the sharply slanting or curved surface that is present in many forms of heels closer towards the shoe end of the heel.

The heel-receiving seat 24 is further provided with a small projection 4'7 extending upwardly and at its upward end there is mounted in the projection an arm 43 extending from the projection rearwardly of the machine or over the heel in the seat. Conveniently, this arm 48 is adjustably held relative to the projection 47 by set screw 49. At the outer end of arm 48 is a small lio a resilient spring holder 5l -projectingfrorn a vvsuitable part-of the plate 38 or .one of its flanges and with the free end of the spring engaging the v near si-de vof the heel as it seen in Fig. 4 slightly v -out from the shoe end of the heel and towards the rear of the heel. The tension of this spring is very light so that the operator may readily fiorce .-it aside enough to insert the heel into .its place .against the plate 38 and against .the .other two rigid .stops at .the lower end of the nger 50 :and the upper .end of the finger 42. The purpose of this .slightly tensioned spring 5l is simply'to fgentlyurge the heel against the other rigid stops and theplate 38 and 'to hold the heel lightly in its proper'posi-tion until the real or positively acting jaw .25 `can be brought into strong contact with the small `end of the heel and yet allow the heel lto :beireadily pushed from beneath saidl spring 51 v'af-ter .the holding jaw 25 has been retracted :from the :heelafter the drilling and dowel-inserting operations have beenV performed.

.'-Ihe outer head 32 carrying the three heel- ;reoeiving seats is adjustable longitudinally of the turret shaft 23 so as to adapt the machine to dif- :terent heights and types of heels by any suitable means such as screw-threaded members that will 'provide accurate adjustment and tight securing :of thehead in Ydesired position.

Inorder to `provide the'three jaws 25 oo-operat i:ing vsafely with the heel-receiving seats 24 and for the said jaws .to be separately movable towards their respective heel-receiving seats the said jaws are formed as strong L-shaped mem- :bers the long ar1n152 of which projects radially fand at right angles from the turret shaft 23 while -thefbaserend 53 is widened and suitably shaped to `slide in oppositely disposed guideways 54 provided iuponzthe inner head 55. This inner head is shaped torprovide Vthese threesets of .guid'eways for the iequally spaced jaws 25 and saidinner head is slidliing'ly mounted but securely fastened upon the.v

-turret shaft 23. At the rear end of lthe base por- 'tion .53 of each jaw 25 there is provided'an antifriction roller 56 adapted to engage and to receive pressure from the :cam ring. 57 mounted .upon the frame just forward of the front bearing 29. Engaging a suitable part of the` base of jaw 125 there is provided an expansion spring 58 soA jarranged as to tend to push theiaw 25 rearwardfly oraway'from its cai-operating heel seat but adapted to yield and allow the said movable jaw :to be moved forward into holding contact with jaw V25 move from the top or loading position shown .in Fig. 4 to go towards the next ordrilling .position and 'lasts until a point a little beyond `the rdowel-inserting position. It will be seen,

. therefore, that immediately after a set of heel :holders start rfrom the loading position shown in 4-the 'jaw 25 will'be advanced to the dotted dine xposition' shown vin said Fig. 4.andthe1per vstroleand to retract it thereafter.

forated boss 59 on the frontv of said jaw will come finto lpositive and rm engagement with said heel.

This pressure and firm gripping of the heel between the advancedjaw 25 and the heel-receiving seat will continue without interruption while thel heel travels to the drilling position and is being `-drilled .at that position and while the heel'istraveling towards the dowel-inserting position and is having the vdowel inserted therein- .It will thusbe Yseen that this ready-placingwof once .properly'set and adjusted the holes will vbe '1? drilled in the proper position Vand Vthe dowels 'will be inserted without strain in the holes .so

placed.

' It will be understoodythat by driving and gear- 'ing mechanism hereinafter .described the turret il., .shaft is rotated hy a step-by-step motion onethird of a revolution at a time with a pause atxthe end of each period oi'travel tandy that as the machine is organized as here illustrated the position of a pair of heel holders .at the top ofthe ,fi-

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circle of travel is calledand used as vthe loading position and that as the pairs of yheel holders successively travel from the upright position one- `third of a revolution vin an anticlockwise direction -as seen from the front of the vmachine a .pair of heel .holders will be brought with its heel therebetween to the drilling position andthere held during the drilling operation, and that after another one-third rotation of the turret shaft this heel and its heel holders will be ,movedstill in an anticlockwise direction -to `the right hand Y .side of the machine to the dowel-inserting position and held there during the insertion of thedowel, and that after the dowel has been so inserted the next third of a revolution willcarry said `heel holders towards and to the loading position. During a part of this last one-third rotation the movable jaw 25 will be released from-the :high part of the cam ring 57 and the co-operating expansion spring 53 will move said jaw from its heel 1'.'

andthe heel will be pushed from its place vupon the heel seat against the yielding tension of spring 51. Asthe heel is so pushed from the heel seat as by a projecting arm 60 suitably fastened to an adjacent part of the frame the heel will fall into a chute 6l' provided therefor and carrythe successive heels into any suitable container.

Drilling mecltomismv The drilling mechanism 2'? and its advanceable drill 28 are located upon the left hand Vside ofthe This mechanism is of spindle' 63 projects from Vone end of the casing vwith a chuck 64 for holding the drill 28, the said spindle being advanceable relative to thecasin'g 62.50 as'to carry the drillforwardior Vits working other end of the casing 62 is the smallpulleyw for rotating the-spindleat allv positions of the vsaid spindle in a, Way common to such drilling machines and not necessary to he explained Near the .'herein. rhepulley 65 is .driven by b elti passing 1159 over pulley 67 on the shaft of the motor 68 used for driving the whole machine. The advancement of the spindle 63 vand therewith the -drill 28 is here shown as being brought about by the toothed rack on the inside of the casing 62 and co-operatively connected to the spindle 63, but not shown in the drawings being given a movement longitudinally of the casing 62 by a toothed wheel below the spindle 63 and mounted on short cross shaft 69. This shaft 69 has at its inner end another toothed wheel 70 which is in mesh below with a toothed rack 71 mounted upon or carried as a part of sliding carriage 72. This carriage is suitably. mounted upon guideways in the frame above the table 22 and has a lengthwise movement imparted thereto by means of an anti-friction roller 73 depending from the carriage engaging the flange cam 74 of cam wheel 75. As the machine is shown and organized the cam wheel 75 has two similar cams 74 on the flange of the wheel and the cam shaft 76 is driven at the proper speed as hereinafter described so that one cam 74 makes an operative or advancing movement of the carriage 72 and consequently causes a forward movement of the drill 28 while a heel is held by the heel holders at the drilling position. Strong springs 77 having their opposite ends attached respectively to the said carriage 72 and to a suitable part of the framework yield when the carriage 72 is positively forced forward by a cam 74 and immediately retract the carriage and consequently the rack 7l after the advance movement has been completed.

It will be understood that the drill 28 in its forward movement advances through an aperture extending through the movable jaw 25 opposite the drilling position and through the already mentioned perforated boss 59 on the front of the jaw. Preferably the boss 59 has a crowned outer face so as to make the pressure of the jaw 25 exerted therethrough be concentrated upon a relatively small part of the small end of the heel. This insures a tight hold upon the heel even though as sometimes happens the dowel is not inserted on a line at right angles with the small end of the heel. The boss 59 is preferably provided with a rearwardly extending shank inserted in the aperture of the jaw 35 and held therein by set screw 87. The perforation spoken of as eX- tending through the boss of course extends through the rearwardly projecting shank of the boss. The boss mechanically of course is a part of the jaw and is provided as a separate replaceable part for mechanical efficiency.

Drill testing and signalling mechanism drilled when the break occurred. A heel with* such a broken drill tip therein when moved'to the next position would cause trouble because the hole would be partly filled by the tip and would not allow room for the full length of the dowel to be inserted therein. Either of these situations might cause damage to the machine and would result in mutilated or damaged heels.

Consequently I have provided in connection with drill after each drilling operation and means for giving a visiblesignal to the operator in case a drill is found by such test to be broken. This testing mechanism Vconsists of a rock shaft 78 rockingly mounted in brackets 79 and having at the forward end of the rock shaft an arm 80 adapted to engage at its outer end and rest upon the drill 28 some distance out beyond the drill chuck 64. In case the end of the drill has been broken on the outer end of arm 80 will not find support by coming into engagement with the drill 28, but will drop farther and bring contact arm 81 mounted on the rock shaft 78 into Contact with a fixed contact plate 82 of an electric circuit having its wires leading respectively from the swinging Contact arm 81 and the fixed contact plate 82. It will be understood that if the drill 28 is intact when the arm 80 is allowed to swing down against the drill the movable contact arm 8l will not reach the nxed electriccontact 82, .but if the drill is not intact the arm 80 will swing through the position normally occupied by the drill and then the movable. contact arm 8l will be brought into contact with the fixed plate 82 and thereby the circuit through said wires will be completed and light an electric lamp 83 which will be suitably mounted as on a common adjustable bracket near the front end of the machine. As soon as the lamp is lit the operator can quickly stop the operation of the machine and thus prevent damage to the machine and prevent the making of mutilated heels or of heels not provided with a dowel. The drill testing device is preferably so arranged as to swing the arm 88 against the drill 28 not during advancement or lordinary working of the drill but only after the drill has been retracted. ,In this way the testing arm does not increase the liability of breaking the drill nor interfere with the working movement of the drill. To bring this result about the arm 80 is lifted from contact with the drill 28 as soon as the forward motion of the drill begins. The lifting of said arm 80 is accomplished by the rock shaft 78 being equipped at its rear end with another arm 84 having at its outer end a long shoe 85 against which the end of slanting plate 86 rigidly projecting from the carriage 72 comes into camming 12,5 engagement so as to raise the shoe 85 as .soon

as the said carriage starts on its forward movement. The raising of lsaid shoe through arm 84. moves the rock shaft 78 so as to raise the correspondingly projecting arm 80 from thedrill 130 and holds it up from the drill until the carriage has completed its forward and also its backward movement. At the completion of the backward movement the plate 86 ceases to lift the shoe 85 and thereupon the actual testing 135 movement by arm 80 takes place by the said arm falling towards the drill.

Bowel-inserting mechanism The dowel-inserting mechanism consists of dowel-placing and dowel-driving mechanism and also preferably as this machine is organized, of dowel-forming mechanism. It is within the scope of thismachine to use ready-made dowels which may then .be placed in position and then driven into the heels by the mechanism herein described. Preferably, however, I form the machine so that it will automatically make metal dowels of the right length and of the proper formation by taking an indefinite length of wire tudinally arranged dowel-holding throats 95 sitfrom a spool and shaping such' wire to the desired shape and cross section, and then cutting it into the proper lengths fordowels. p y A The driving mechanism consists of a strong arm 88 projecting from the right hand side of the sliding carriage 72 already mentioned and operativelyconnected to plunger 89 as by the -end of said arm 88 straddling ther rear end of said plunger .between spaced nuts-90 and 91 on said plunger. The forward end'of said plunger is slidingly mounted in casing 92 and carries at its forward end outside the casing a chuck 93 whereby the driver 94 is held in forwardly projecting position in alignment with the driving position and adapted to, reciprocate at the proper time back and forth through a dowel-holding throat 95 in the dowel-holding wheel 96 and through the movable jaw 25 located at the driving position.

YThe parts Vof the mechanism so far described are particularly shown in plan view in Fig. 2. The nuts 90 and 91 located upon the rear end of plunger 89 allow the machine to be set to give the right amount of effective travel according to the length of dowels being used and other conditions of an operation. It will be seenalso that by the driver 94 and its operated plunger 89 being connected by arm 88 to the sliding carriage '72 whichvas already mentioned advances the `drill 28, the performing of the dowel driving operation on a heel held at the dowel-inserting position will occur at the same time as a drilling operation occurson a heel held at the drilling position of the machine andA thatfthedriver y 94 will be retracted from the jaw 25 and its apertured boss 59 and fromthe dowel-holding wheel 96 before the heel holders are advanced by the neXt one-third rotation of the turret shaft.

y The dowel-placing mechanism consists ofthe dowel-holding wheel 96 preferably formed as the machine is herein organized with the four longiuated near the periphery of the wheel and ninety degrees apart. Thiswheel is mounted on the forward end of shaft 9'7A extendinglongitudinally of the machine and supported by suitable brackets and bearings upon the framework of themachine with the wheel 96 immediately to the rear of the circular path traveled by the outer ends of the jaws 25. The shaft 9'? and the wheel 96 are so lmounted and proportioned as to bring one throat of the wheel 96 into the center line of the dowel-inserting position and so in line with the aperture of the jaw 25 at the dowel-y inserting position each time a heel is brought to the dowel-inserting position.

As this machine is organized, as it will be seen particularly from an inspection of Fig. 5, when one throat 95 of the wheel 96 is at the driving position the throat directly opposite thereto will be at the dowel-receiving position; that is it will be in line with the mechanism hereinafterdescribed for forming the separate short dowels out of an indefinite length of wire. This dowelforming mechanism is seen in top view in Fig. 2 and partly in side elevation. and partly in longitudinalsection in Fig. 3. Most of this dowelforming'mechanism is situated upon or located close to a movable frame 98. The body of this frame is roughlyU-shaped with its legs 99 spaced widely apart and pivoted at their lower ends on pivots 100 provided upon the main frame while the upper end of the legs are connected by a relatively long horizontal member 101. Conveniently the said frame 98 may be formed of a suitable length of strong angle iron mitered at Y metal dowels 105.

the bends and with the upper surface of the horizontal Iweb of the part of the angle iron forming the horizontal member 101 forming a platform upon which maybe conveniently placed and fastened the different parts of the dowel-forming mechanism.

The movable frame 98.1at'the proper time moves on its fulcrum .quickly a small fraction of an inch to out the length of the wire fed into the throat at'the receiving position from the remaining rearwardly extending wire as will be hereinafter-described, but otherwise the frame 98 remains stationary and its said slight bodily movement does not interfere with the operation of shaping the wire into the proper form for a dowel. v

Upon an open-topped rotatable rack 102` preferably having-a vertical axis and with the rack conveniently supported as by a suitable standard upstanding from or adjacent the framework of the machine there is placed vthe coil 103 of wire 104 of proper size and character for formingthe.

is intermittently drawn forward through the wire straightening device generally denoted bythe numeral 106. This device is a well known commercial unitV consisting of a frame having its twolongitudinally extending halves 107 and 108at right angles to eachother and each carrying a plurality of closely arranged grooved wheels 109 engagingvthe wire and bringing'it to a straight line. As this lmechanism is vhere shown vthe grooved wheels 109 upon the first frame are arranged upon horizontal shafts and the wheels uponthe. second reached` frame 108are arranged upon vertical shafts.

The lnext mechanism reached by the wire is-a mechanism especially devised by me to form four lengthwise grooves .110 spaced about the peripheryr of the wire asseen in cross section as will appear particularly in detailed View Fig. 11. The operationY of the device is such as to throw up a burr or ridge 111 and lll'on the opposite sides ofeach ygroove 110. The purpose of thesegrooves andridgesis to. give the dowels when iinally.formed by my machine an irregular or fluted shape as the dowel is seen in cross section that will prevent theparts of the heel from rotating upon the dowel in case a heel provided with one of inydowels shouldrsplit. The fact that these flutings extend for the full length of the doweldoes not interfere withthestraight and regular driving of the dowel into-.the heel. The ridges 111 and 111 are large enough to press into the wood of the heel sufficiently to prevent the threatened rotation lof the parts of a split heel, but the projection of these ridges is not sufficient to prevent the dowel from being driven into a round hole nor to subject the heel to vundue strain through the driving of such dowel thereinto. This ridge-shaping mechanismis generally denoted by the numeral 113 `and is Vshown in top plan view in Fig, 2 and inside elevation in Fig. 3. `A more detailed view'thereof is shown in Fig.` '7. This unit consists'of Aa central longitudinally extending square block 114. About the right hand quarter 115 of this block remainsof the same size, but thereafter the remaining three-(niartrers of the block` 114 forms an elongated pyramid-shaped member 116 as is `particularly apparent from' li'ig.i '7.` The block 114 is provided with a round hole through-- out its length for feeding of the Wire therethrough. v On each of the four sides of the block 11e there is secured to the. right hand end 115 From this coil the. wire 104 a movable arm 117 extending to the left to a point somewhat beyond the end of the pyramidshaped holder 116. The right hand end of each arm 117 is fastened to portion 115 of the block as by a strong headed screw 118 projecting loosely through a hole 119 in the arm 117 and with the end of the screw screw-threaded into the block 114. This arrangement holds the arms 117 from lengthwise movement relative to the block 114, but allows the arms a slight swinging movement relative to the central block 114 due to the loose t of the arm 117 to the shank of screw 118. y

The outer end of each arm 117 is centrally slotted and between the forked extremities thus provided there is rotatably mounted a cutting disk 120 having its periphery formed in the shape of a relatively sharp V, These cutting disks are similar to the cutting disks in a pipecutting tool, but operate upon the wire drawn longitudinally between the four cutters operating upon the wire to make the four grooves 110 and the eight ridges 111 and 111. The four arms 117 of this device are kept in proper relation to each other and the disks 120 in shaping relation to the wire by thesaid arms 117 being enclosed by a hollow square clamp 121 which encircles the four arms 117. Opposite each arm 117 there extends through the clamp 121 the shank of an adjusting bolt 122. The shank of said bolt is screw-threaded through the clamp but the inner end of the screw rotates in a plain or non-threaded hole 123 in the arm whereby rotation of the bolt 122 may adjust any arm inwardly relative to its portion of the clamp 121.

Next to the left after the ridge-forming mechanism just described and as the parts are seen in Figs. 2 and 3, the wire comes to the wiredrawing and wire-feeding mechanism being the device by which the wire is drawn from the rack 102 and then through the wire-straightening device and the ridge-forming device already described. This drawing mechanism consists of a traveling clamp reciprocating back and forth and clamping the wire on its forward or left hand stroke, but releasing itself from the wire on its backward or right hand stroke. This clamp is illustrated as having the lower vjaw 124 with its upper face the lworking face and preferably provided with crosswise extending small ridges so as to assist in gripping the wire and'also so as to form by the act of tightly gripping the wire aseries of burrs 125 transversely of the wire. These burrs operate as barbs when the wire dowels are forced into the wooden heels and serve to prevent the dowels from coming out of the wood and thus operate to keep the parts of a heel together if a heel should split.

Opposite to the lower jaw 124 and above the wire 104 there is mounted a plurality of pivotally mounted wedging cams which are pivoted on suitable horizontal pins 173 mounted in the upper traveling jaw 127. l (Figs. 6, 7 and 12) These wedging cams 126 as shown in 7 are of increasing diameter towards the left and are held lightly and yieldingly in contact with the wire therebelow, partly by the gravity of the cams and directly by the use of a spring 123 operatively connected thereto. As the two jaws 124 and 127 advance or are moved forward to the left the wedging cams 125 swing in an obvious manner to quickly come into locking engagement with the wire and so hold it positively between said cams and the opposite 1211 and so effect a drawing of the wire to the left to the propel? These guideways are conveniently mounted uponv the horizontal member 101 of the movable frame 98 and the jaws are so reciprocated by means of a pin 129 projecting rearwardly from one of said jaws being engaged between the forks 130 at the upper end of a lever 131.` This lever 131 is pivoted intermediate its length on a stud bolt 132 suitably provided upon the movable frame 98 towards its left hand end with the lever in a generally upstanding position. The said lever is moved by reason of a roller 133 at its lower end being in engagement with the face of a cam wheel 13e, the cam face being "on the edge of a iiange on said wheel facing towards the right as the machine is shown in Figs. 2, 3 and 7. The cam wheel i3/i is rigidly mounted upon the shaft 135 extending longitudinally ofthe main frame and suitably mounted thereon in convenient bearings. On the basis of there being one cam upon the cam wheel 134 the said shaft 135 is rotated so yas to produce one working or drawing action of the wire feeding jaws 124 and 127 each time a throat in the dowel-holding wheel 96 is brought into position in line with the wire feeding mechanism.

Immediately after passing through the wirefeeding jaws just mentioned the wire passes into aperture 136 of the shearing jaw 137. This jaw is rigidly mounted directly or indirectly upon the upper part of the movable frame '98 as by being formed as a projection on the left hand end of the guideway members of the wire-drawing mechanism. Upon a forward movement of the wire-feeding mechanism the proper length of wire to form the required dowell is fed through,

the aperture of the shearing jaw 137 into the aligned throat 95 of the dowel-holding wheel 96, such throat being theretofore empty.

After the length of wire has been so fed into the f said empty throat 95 the whole movable frameV 98 is given a quick movement on its pivots 100. This movement carries the upper part of the frame 93 and therewith the shearing jaw 137 laterally or substantially horizontally for only a fraction of an inch, that is a little more than the diameter of the wire being formed into dowels. This movement of the shearing jaw laterally while the end of the wire is in the relatively i'lxed or stationary loading throat operates to cut or shear the wire at the adjacent edges of said shearing jaw 137 and the throat 95 that is at loading position. It is to eect this shearing operation that the frame 98 carrying the wirestraightening mechanism, the wire-ridging mechanism and the wire-feeding mechanism is movably mounted. As the wire-drawing, the wire-ridging and the wire-straightening devices are all rigidly mounted in a line with the shearing jaw on top of the movable frame, the move- 'i enough to interfere with the periodical drawing of the'wire from the rack. 102.

'The slight swinging movement of the frame 98 upon the movable frame 98, saidA engaging roller 139 `being so placed relative to the shaft 135 so as to cause an outward swinging of the movable frame on its pivots 13G. As this particular ma,n chine is organized, the cam shaft 135 is to the left of the body of frame 98 as seen in Fig. 5 so that the engagement of the cam 138 with its cov operating roller 139 on the frame operates to quickly but only temporarily swing the said frame 98 and therewith the shearing jaw to. the right. A spring 140 normally but yieldingly holds the said frame 98 in subsuantially vertical vposition atV alltimes except when the cam 138 is engaging'its roller 139.

The fact that the lever 131 is pivoted upon the movable frame 98 while the cam wheel 134i operating said lever is mounted upon a nxed axis, namely that'of the shaft 135, does not interfere with the operation of the said lever leading to the wire-drawing mechanism for the reason that the Wire-drawing operation takesl place before'the shearing operation and the parts are not dislocated or disarrangeol Vbecause the movement of the frame 93 is so slight and for so short a time.

vAcontractile spring 140 conveniently attached at Y already mentioned.

itsopposite ends to the upper half of the said lever 131 and a convenient part of the main frame of the machine to the right of said lever as the parts are seen in Fig. 7 serves to retract the wire-feeding jaws 12e and 127.

lAs this machine is built as Vwill appear from Fig. 6 the lever 131 for operating the wire-feeding jaws is mounted'on the inside of the frame 98, that is to the left as the parts are seen in this figure, and this happens to bring said lever in vertical alignment with the shaft 135 carrying the cam which operates said lever. `Accordingly the half of said lever 131 below its stud-bolt 132 is provided with an offset 141 somewhat larger than 'and passing to the left of the'said shaft 135. Below this offset the lever again resumes its line tol carry at its lower end the cam roller 133 Y It will be understood'that the Vsaid offset 141 allows the said lever 131 to be carried bodily laterally for the short travel of the movable frame 98 (without interference between said lever and said shaft) when the said frame carries the shearing jaw back and forth.

lBy referring particularly to Figs. 6, 7, 12 and 13 it will be seen that provision is made for positively disengaging the pivoted wire-engaging cams 126 at the end of the forward stroke or before the end of the forward stroke of wire feed lever 131 and that two methods are provided for independently or concurrently adjusting the machine to feed forward only the desired amount of wire required for a dowel of the desired length.

The means for positively disengaging the swinging cams 126 from the wire consists of -a horizontally arranged rod 17e pivoted to each of the said cams above their fulcrurn pins 173 and projecting to the left as seen particularly in Fig. 7 through a suitable channel left in the upn per jaw 127. The left end of thisv connecting rod is adapted to come into engagement with a shoulder 175 on stud 176 adjustably mounted in the guideway provided for said jaws and projecting into the passage opposite the end of the said con-l necting rod. This stud 176 is. so set as to have its stop shoulder 175 engage the opposite end of said connecting rod 174 before the jaws have quite completed their travel to the left due to the swing of lever 131. It will be obvious from an inspection of Fig. 7 that when the left hand end of said connecting rod cornes into engagement with said stop shoulder, the movement of said connecting rod will be stopped and further motion of the jaws will operate simply to swing the cams 125 clockwise on their fulcrum pins 173 and so release the grip of saidcams upon the wire and consequently the grip of the lower jaw 134.

upon the wire.

A positive and very convenient method of ad# justing the machine vto feed forward a different length of dowel is to loosen the screw-threaded fastening means for stud 176 and adjust said stud to the right through its slot for shortening Ythe lengthl of the dowelr to be made or adjusting said dowel to the left for lengthening the dowel to be made. It will be obvious that when this stop shoulder of the stud 175 in combination with the connecting rod17fl is used to make a shorter dowel, the swinging cams will be disengaged fromY the wire and thereby the wire disengaged from bothk jaws before the jaws have completed their travel to the left, but that after the said cams have been released from the wire, the travel of the jaws will not be effective' to feed any more wire forward. As this machine is organized the adjustment of the locationof stud 176 is more adapted for making the nal exact regulation of the length of the' dowelsthan for effecting great changes in the length of the dowel. j For considerable changes in the length of the dowel the location of the stud bolt 132, which is the fulcrum for lever 131, is inade adjustable both as regards its vertical position in the vbracket '178' a slot or slots 132 in one of the iianges 179 wherev upon the said block can be moved up or downto the required position'and then said cap screws ns l tightened to hold the block inproper position.Y

Aft the same time the ,pivoting position of the shank of said stud bolt 132 is adjusted lengthwise of the lever by loosening thenut 183 at the rearward end of stud bolt and then loosening the lock nut 181i engaging the rearwardend of the bushing 185. The forward end'of- Ysaid bushing as shown in 13 has an annular flange which engages the forward edge of the lever 131 while the loekrnut 184.- engages the rearward edge of said lever. VLl/"nen the nut 13e is loosened the relative vertical may be had between the lever and the said bushing to make the de-v sired adjustment of position, then the lock nut 184 is again tightened to hoid the said bushing in longitudinal position upon .the lever.` It will be understood ofcourse Ythat the vpivoting action takes place between the shank of the stud bolt 132 and the bore of said bushing. The nut 183 simply holds the lever in place upon the stud bolt. It will be understood of course that moving the pivoting point between lever 131 and the bracket 178 of the movable frame downwardly increases the relative travel of the working or upper end of shaft 131 and thereby increases the feed of the wire at each forward motion of the lever.` On the other hand, adjusting the parts so as to raise the stud bolt shortens the feeding travel of the upper end of the lever and so adapts the machine to make shorter dowels.

A vertically supported guard 139 is provided at the front of the machine to protect the operator from moving parts but allow access to the heel holders at the loading position.

Driving and operating mechanism It will be understood that the illustration in the drawings and the description now to be given of the means for driving the machine and for operating its different parts and mechanisms at the proper time and in proper co-ordination are given only for denitenessof description and for certainty in understanding the machine and as illustrative of the invention and are not given as limitations upon the invention. It is obvious that various changes particularly in these driving and operating parts may be made without departing` from the spirit of my invention.

The already-mentioned main motor 68 of the machine is conveniently located upon the lower platform 21 of the main framework 20. Upon the projecting shaft of this motor there are two pulleys, one, namely 67, engaged by the belt already mentioned as going to the pulley 65 upon the drilling mechanism and the second pulley 142 which carries the belt 143 extending to the larger pulley 144 upon the countershaft 145 supported in suitable bearings upstanding from the said lower platform 21 of the frame.

Towards the rear end of the machine this countershaft 145 is provided with a small pulley 146 engaged by a belt 147 passing upwardly to a larger pulley 148 conveniently floatingly mounted upon shaft 76. Floating upon the same shaft and movable with the pulley 148 there is provided a small gear 150 in mesh with a larger gear 151 located thereabove and secured on a sleeve 152 iioating upon the rearward end of the turret shaft 23. It will be seen that this system of pulleys and belts and train of` gears will result in reducing the fast speed of the shaft of motor 68 to a much slower speed for the sleeve 152. Secured to this sleeve is a sprocket wheel 153 which is engaged by a chain 154 passing downwardly about toothed wheel 155 which in turn is secured to a sleeve 156 floatingly mounted upon the cam shaft 76.

The sleeve 156 on its side toward the front of the machine engages or forms a part of a continuously controlled clutch 157 carrying at its forward end the driving wheel 158 conveniently of the Geneva wheel type. Each of the two oppositely disposed rollers 159 of this drive wheel engages successively the slots 160 in the threeprong driven Geneva wheel 161 which is rigidly mounted above on the turret shaft 23. Assuming that the clutch 157 is in its normal engaged position it will be seen 'that the turretshaft 23 will be given a step-by-step rotation for one-third of a revolution and that after each such one-third rotation the turret shaft will be locked from further motion by the engagement of a convex portion 162 of the driving Geneva wheel 158 with one of the concave faces 163 between the three prongs 164 of the driven wheel 161. There is thus produced the step-by-step rotation of the pairs of heel holders upon the turret and the holding of said heel holders for a pause after each movement of the heel holders during which pause the drilling mechanism and the dowelinserting mechanism respectively and cotemporaneously carry out their respective full operations automatically and a new heel is inserted manually at the loading position.

The clutch 157 normally has its parts in working engagement, but these parts can be quickly moved to disengage the clutch and so stop the movement of the turret shaft 23 and also the movement of cam shaft 76 (which is in line with and moved by the drive wheel 153) by means of a connecting link 165 extending down from said clutch to an arm rigidly projecting from a rock shaft 156 mounted at the bottom of the main frame of the machine and conveniently moved by a projecting pedal 167 at its forward end within reach of the foot of the operator of the machine located at the front of the machine. (See Fig. l.)

It will be recalled that the cam shaft 76 carrying the cam wheel with its two cams 74 for operating the carriage 72 which advances the drill and the dowel-driver is so geared relative to the turret shaft 23 as to make one and one-half rotations while the turret shaft is making one rotation so as to obtain a drilling operation and simultaneously a dowel-driving operation and allow a manual loading operation after each 110 one-third rotation of the turret shaft and its three pairs of heel holders. At a convenient point upon this cam shaft 76 say immediately back of the middle upright of the machine, said shaft has secured thereto a sprocket wheel 168 115 which through chain 169 drives sprocket wheel not shown but iixedly mounted uponshaft 135 at twice the speed of shaft 76. This shaft 135 has already been mentioned as being located at Y the right hand side of the machine and carrying the cam wheel 134. At a convenient place upon the shaft 135 say just forward of the central uprights of the machine, the shaft 135 has xed thereto the driving wheel 171 which is in operative engagement with the four-pronged driven wheel 170 of `a Geneva wheel intermittent gearing device. Wheel 17() is fix'edly mounted upon the shaft 97 already mentioned as having mounted thereon the dowel-carrying wheel 96 with its four spaced dowel-receiving throats 95. It will be seen from the foregoing that at each pause of the turret shaft and while a dowel is being driven from the throat 95 of wheel 96 in line with the driver and with a bored heel at the driving position a dowel will be formed in line with the diametrically opposite throat of the wheel 96 and placed in said throat opposite the dowel-forming mechanism. lt will be seen further from an examination of Fig. 5 also that co-incident with the bringing of a succeeding pair of heel holders with its bored heel to the dowelinserting position the throat 95 formerly ninety degrees away from the dowel-inserting line will be brought by a one-quarter rotation of the wheel 96 in line with the dowel-inserting position and ready to be forced by the driver into the said bored heel which has just arrived at driving position. During this said one-quarter rotation of the dowel-carrying wheel 96 the dowel just previously formed diagonally across from the 159 bination of a'supporting dowel-'driving position will bev moved one-quarter of a rotation or half way to driving position. In other words, the dowel-holding wheel 96 has four throats. When the said wheel is stationary, one

uo receive a dowel when the wheel is moved ninety degrees so as to bring this fourth throaty opposite the dowel-making mechanism. This fourthroated form of thedowel-carrying wheel 96 is for convenience and efficiency in mechanical construction and operation of the machineV helpsin the timing of the parts more' easily and accurately and also helps vin allowing the dowelforming mechanisms to be farther away from the center line'oi the driver of the dowel-insertingmechanisin.

The clutch 15'! is normally held continually in engaged'position by continued depression of said pedal 167 and release of the pedal disengages the clutch and through rod 18S automatically brings a brake band 185 into engagement with 'brake wheel 18% iXed on the rear end of cam shaft 76.

What IV claim as new-and desire to secure by Letters Patent is:

l. In a machine for doweling heels, the combinaton of a supporting frame, a turret shaft revolubly mounted thereon, three heel-receiving seats rigidly mountedupon said sha-it in spaced positions in a circle about said shaft, three similarly spaced jaws mounted upon said shaft severaliy opposite the seats and movable separately towards and from the opposite seat whereby an ladvanced jaw tightly holds a heel between said jaw and the opposite seat, means co-operatively connected to said turret shaft to progressively rotate it by a step-by-step motionwhereby each pair of seats jaws will be successively moved to and stopped at loading position, at drilling position and at driving position, means mounted on the frame and co-operating with said mov- `ablejjazvs toadvance each jaw to holding position before it comes advanced until leaves driving position and i means vfor retracting 'said' movable jaws when released fromv saidadvancing means. f

2. In a machine for doweling heels, the comfraine, a turretshaft revolubly mounted thereon', three vheel-receiving seats rigidly mounted upon said shaft in spaced positions Aiii-a circle about said shaft, three similarly spaced jaws mounted upon said shaft severally opposite the seats and-'movable separately towards.andr from the opposite seat whereby an advanced jaw tightly holdsy a heel between said jaw and the opposite seat, means cti-operatively connected to said turret shaft to progressively rotate it by a step-by-step motion whereby each pair of seats and jaws will be successively Amoved to `and stopped at loading position, at drilling position and at driving position, a cam ring mounted on the'frame aboutV said turret shaft and co-operatingv with said movablejaws to advance each jaw to holding position before it comes to drilling position. and hold it advanced until it leaves drivng'position and means for retracting said movabie jaws jvvhen released from said advancing means. i

Y3. In a machine for `doweling heels, the combination of a supporting frame, a turret shaft rev- `on the dril'li'ngposition and hold it olubly mounted thereon, *three* heel-receiving "seats rigidly mounted upon said shaftv in spaced connected tov said turret shaft to progressively rotate it by a step-by-step motion whereby each pair of'seats and jaws will be successively moved to and stopped at loading position, at drilling Apo#- sition and at driving position, means mounted 'e and co-operating with said movable jaws toadvanceeach jaw to holding position before itcomes to drillingposition and hold it advanced until it leaves driving' position, means for retracting-said movable jaws when released from said advancing means, drilling mechanism located on the frame `and havingv a drill in line with the drilling-position andfmeans for advancing said 'drill into and withdrawing it from a heel held in the drilling position by a co-operating heel seat and jaw, dowel-inserting mechanism -located 'on ythe frame opposite the driving position Vand means operative when a heel is held at driving position for causing said dowel-inserting'mechanism'. to place a dowel opposite the previously drilledhole in Vthe said heel and to drive said dowel` into said hole.

4. In a machine for doweling heels, the combination of a supporting frame, ar turret shaft revolubly mounted thereon, a plurality of heelreceivingseats .rigidly mounted upon said shaftl in spaced positions in a circle about said shaft, a like number of similarly spaced jaws mounted upon said shaft severally opposite the seats and movable' separately towards and from the oppol site seatwhereby an advanced jaw tightly holds a heel between said jaw and the opposite seat, means co-operatively connected to said turret shaft to progressively-rotate it bya. step-bystep motion whereby each pair of 'seats yand jaws will be successively `moved to and stopped at loading position, at drilling position and at driving position', means mounted on the frame and co-operating .with said movable jaws to advance each jaw to holding positiony before it comes to drilling position and hold it advanced until it leaves driving` position, means for retracting said movable jawswhe'n released from said advancing meanadrilling mechanism lo? cated on the' frame and having Va drill in line with the drilling positionand means for advancing said drill into and 'withdrawing it from a heel held in the vdrilling'position by aco-operating heel seat and jaw, dowel-inserting mechanism located on the frame opposite vthe driving position and means operativewhen a heel is held at driving position for causing said dowelinserting mechanism to place a dowel opposite the previously drilled hole in the saidheel and to drive said dowel into said hole.

5. In a machine for doweling heels, the combination of a supporting frame, a turret shaft revolubly mountedthereon, a plurality-of bodilymovable pairs of heel-holding members mounted upon said shaft in spacedpositions lin a circle about said shaft, each pair of heel-"holding members consisting of a heel-receiving seat and a holding jaw opposite thereto, the units of one set of said members being separately movable operatively connected to said turretyshaft to sition, at drilling position and' at driving positionfmeans mounted on the frame and coi-operating separately with the movable member of each pair of heel holders to advance said movable member to holding position before its pair comes to drilling position and to hold it advanced 'until its pair leaves driving position, means for retracting said movable holders when ,released from said advancing means, drilling mechanism located on the frame and having a drill in line with the drilling position and means for advancing` said drill into and withdrawing it'from a heel held in the drilling position by a co-operating heel seat'and jaw, dowel-inserting vmechanism located on the frame opposite the driving position and means operative when a heel is held at driving position for causing said dowel-inserting mechanism to place a dowel opposite the previously drilled hole in the said heel and to drive said dowel into said hole.

6. In a machine for doweling heels, the combination of a supporting frame, drilling mechanism located on the frame and including a rotated drill adapted to be advanced into and withdrawn from a heel held opposite thereto, dowelinserting mechanism located on the frame and including means for placing a dowel opposite the previously-drilled hole in a heel held opposite and for driving said dowel` into said hole, a plurality of bodily-movable pairs of heel-receiving seats and holding jaws, each jaw being movable relative tc its seat to be advanced towards its seat to tightly hold a heel placed between said *jaw and seatand to release said heel when the Vjaw is retracted, means to advance progressively by a step-by-step motion said pairs of heel- `receiving seats and jaws successively to a position adjacent said drilling mechanism and then adjacent said dowel-inserting mechanism and then to a position where the jaw is retracted, the heel released and another heel maybe inserted, means for advancing the said drill when a heel is held opposite thereto byfa seat and a jawand means for operating said dowel-inserting mechanism when a heel is held opposite thereto by a seat and a jaw.

7. In a machine for doweling heels, the combination of a supporting frame, drilling mechanism located on the vframe and including a rotated drill adapted to be advanced into and withdrawn from aV heel held opposite thereto, dowelinserting mechanism` located on the frame and including means for placing a dowel opposite the previously-drilled hole in a heel held` opposite and for driving said dowel into said hole, a plurality of `bodily-movable pairs of heel-receiving seats and holding jaws, each jaw being movable relative to its seat to be advanced towards its seat to tightly holda heel placed between said jaw and seat and to release said heel when the jaw is retracted, means to advance progressively -by a step-by-step motion said pairs of heelreceiving seats and jaws successively to a position adjacent said drilling mechanism and then adjacent said dowel-inserting mechanism and then to a position where the jaw is retracted, the heel released and another heel may be inserted, means for advancing the said drill when a heel is 'held opposite thereto by a seat and a jaw, means for testing the drill'after each drilling operation and means for operating said dowel-inserting previously-drilled hole in a heel held opposite and 'F for driving said dowel into said hole, a plurality' of bodily-movable pairs of heel-receiving seats and holding jaws, each jaw being movable relative to its seat to be advanced-towards its seat to tightly hold a heel placed between said jaw and'.

seat and to release said heel when the jaw is retracted, means to advance progressively by a stepby-step motion said pairs of heel-receiving seats and jaws successively to a position adjacent said drilling mechanism and then adjacent said dowelinserting mechanism and then to a position where the jaw is retracted-the heel released and another heel may be inserted, means for advancing the said drill when a heel is held opposite thereto by a seat and a jaw, means for testing the ldrill after eachdrilling operation and for giving a signal ir" the testing means nds a broken drill, and means for operating said dowel-inserting mechanism when a heel is held opposite thereto by a seat and a jaw.

9. In aY machine for dowelingheels, the com-- bination of a supporting frame, a turret shaft revolubly mounted thereon, a plurality of bodilymovable pairs of heel-holding members mounted upon said shaft in spacedpositions in a circle about said shaft, each pair of heel-holding members consisting of a heel-receiving seat and a holding jaw opposite thereto, the units of one set of said members being separately movable towards the other member of the pair whereby a heel between the members of a pair so relatively contracted will be tightlyI held, means co-operatively connected to said turret shaft to progressively rotate it by a step-by-step motion whereby each pair of seats and jaws will be successively moved to and stopped at loading position, at drilling position and at driving position, means mounted on the frame and co-operating separately with the movable member of each pair of heel holders to advance said movable member to holding position before its pairrcomes to drilling position and to hold it advanced until its pair leaves driving position, means for retracting said movable holders when released romsaid advancing means, drilling mechanism located on the frame and having a drill in linerwith the drilling position and means for advancing said drill into and withdrawing it from a heel held in the drilling position by a co-operating heel seat and jaw, means for testing the drill after each drilling operation and for giving a signal if the testing means finds a broken drill, dowel-inserting mechanism located on the frame opposite the driving position and means operative when a heel is held at driving position for causing said dowel-inserting mechanism to place a dowel opposite the previously drilled hole in the said heel and to drive said dowel into said hole.

10. In a machine for doweling heels, the combination of a supporting frame, drilling mechanism located on the frame and including a rotated drill adapted to be advanced into and withdrawn from a heel held opposite thereto, dowel-inserting mechanism located on the frame and including means for placing a dowel oppoand including means for placing a dowel oppiotowardsv its seat between said jaw vand seat vand -to release :said

flagging-79 -zsite the previously-drilled hole in "a heel held opposite and for driving said dowel .into said' hole, a plurality of bodily-movable pairs of heel- -receiving seats and holdingjaws, each jaw :being movable relative to its seat` to' be advanced to tightly VholdI a heel placed heel when the jaw isretracted. means to advance progressively by astep-by-step motion said pairs of heel-receiving seats and jaws successively to a position adjacent said vdrilling vmechanism and `then adjacent said dowel-inserting mechanism and then to a position where 'theV jaw is retracted, the heel released and another heel may be inserted, coternporaneouslyV acting means `for `advancing the drill into a heel held opposite theretoI and for advancing the dowel-driver to drive a dowel into a heel-held opposite thedriver and y.then for retracting said drilland said fdriver.

1l. In amachineifor doweling heels, thecombination of a supporting frame, drilling Vmechanismlocated on the frame and including ,aV Vrotated drill adapted tto be advanced into and withdrawn from a heelheld opposite thereto, dowel-inserting mechanism located on the -irame site the `previously-drilled hole in' a heel held opposite and for driving said dowel into-said hole,

Y`a plurality of bodily-movable pairs v,of Aheel- Vrreceiving seats and holding jaws, veach jaw being vmovable relative to` its seat to be A.advanced towards its seat to 'tightly .hold a heel placed `between said jaw and seat and 4to release said heel when Vthe jaw isretracted, vmeanszto advance progressively by a step-by-,step motion said .pairs of heel-receiving seats and jaws successively to a .position adjacent said drilling mechanism and then adjacent said dowel-inserting `mechanism then to a position where the rjawis retracted, vthe heel released and another heel may be inserted, cotemporaneously acting means includinga common lmovable carriage forgadvancing the drill into a heel held. opposite thereto and @for advancing the dowel-driver to drive 'a ldowel into a heel held opposite ythe driver and thenfor retracting said drill and saiddriver.

.-12. ,In a machineV for doweling heels, thelcom- Abination of Va supporting frame, a turret shaft revolubly mounted thereon, va plurality of bodilymovable pairs of heel-holding members-monnted upon said shaft in spaced positions 'in a circle `about said shaft, eachpair ofheel-holding'members consisting-of aheel-receiving seat and a holding jaw opposite theretdfthe units Lof-*one set of said members being separately -movable `towards the othermember of the pair whereby a heel between the members of a-pair so relatively Yc'olfitracted will be tightly held, means (ro-operatively connectedl tor said turret shaft Atofprogressively rotate it by a step-by-"step motion `wherebyeach pairvoi seats and jaws willi-be :suc-

cessively moved toand stoppedat loading position, at drilling position and .at driving position,

means mounted on the vframe and co-operating vseparately with the movable member oef-'each pair oi heel holders to advance said vmovablemernber to holding position before its pair-comestodrill- ,ing position and to hold it advanced-until its pair lleaves driving position, means for retracting said `movable holders when released from said yadvancing means, drilling mechanism located on the frame and having a drill in line with the drilling position, dowel-inserting gmechanism located on-the frame opposite the driving position and including dowel-placing means and va Inovable dowel-driverand cotemporaneously acting means for advancing the drillv into a heel held opposite thereto and for advancingY the dowel- "driverto drive a dowel into a heel held opposite the driver and then for retracting. said drill andv said driver. y 1-3. In aymachine for doweling heels, the combination of asupporting frame, a turret shaft .revolubly mounted thereon, a plurality of bodilyupon -said'shaft'in spaced positions in a circle bers consistingk of a heel-receiving seat anda holding. jaw Opposite thereto, the units of one set sok ' .aboutsaidshaft, each lpair 'of heel-holding memwards the-otherV member ofthe pair whereby a lheel between the members of a pair so relatively .contracted will be Atightly held, means co-opera- ,tivelyconne'cted Vto said turret shaft to progressively rotate it by a ystep-by-step motion whereybyffeach pair of seats and jaws will be successively moved to and stopped at loading position, at `drilling position and lat driving position, v`means .mountedfon the frame and cri-operating separately with the movable member Vof each `pair of v.heel yholders to advance said `movabley member `to yholding position before its pair comes to-drilling position and to hold it advanced until its pair r.leaves driving position, means ior retracting said able dowel-driver and lcotemporaneously acting means including la vcommon movable vcarriage for ,advancing the drill into a heel held opposite theretoiand vfor advancing the dowel-driver to drive a dowel vinto a'heel held'opposite the 'driver and then for retracting said drill and said driver.

1-4. In a machine for doweling heels, the combination vof a supporting frame, a turret shaft revolubly mounted thereon, arplurality of bodilymovable pairs of heel-holding members mountfred-upon said shaft in spaced ypositions in a circle about said shaft, each pair of Yheel-holding members consisting of a heel-receiving seat rand a ,holding jaw opposite thereto, the units of one yset o f said kmembers being separately movable Vvtowards the other member or" the pair whereby a"heel, between vthe members of a pair so relatively contracted will be tightly held, means vcoiin agri-s ser) ias

operatively connectedto said turret shaft to progressively rotate it by a step-by-step motion whereby each pair of seats and jaws will be successively moved toand stopped at loading po- `sitiorrat drilling position and at Vdriving position,-,means mounted yon the frame and co-oper- -ating Yseparately with the movable member of ,eachpair of heel V'holders-to advance said mov- -able member to holding position before its rpair comes to drilling position and to hold Yit advanced until its pair vleaves ldriving position, -means 4for retracting said movable `holders when released from said advancing means, drilling .mechanism located on the `frame andfhaving a vdrill-in line with the drilling position and means .fior advancing said drill into and withdrawing it vfrom aheel held in .the drilling position by a cooperating heel seat andjaw, dowel-inserting fmechanism located von the vframe `opposite the ist vdriving position, means operative when a heel is held at drivingposition for causing saiddowel- :inserting mechanism to place a dowel opposite ,movablepairsfof heel-holding members mounted 35 'of said Ymembers being'separately movable toj 90 l upon said shaft in spaced positions in a circle about said shaft, each pair of heel-holding members consisting of a heel-receiving seat and a holding .iaw opposite thereto, the units of one set of said members being separately movable towards the other member of the pair whereby a heel betweenA the members of a pair so relatively contracted will be tightly held, means co-operatively connected to said turret shaft to progressively rotate it by a step-by-step motion whereby each pair of seats and jaws will be successively moved to and stopped at loading position, at drilling position and atv driving position, means mounted on the frame and co-operating separately with the movable member or" each pair of heel holders to advance said movable member to holdingv position before its pair comes to drilling position and to hold it advanced until its pair leaves driving position, means for retracting said movable holders when released from said advancing means, drilling mechanism located on the frame and having a drill in line with the drilling position and means for advancing said drill into and withdrawing it from a heel held in the drilling position by a co-operating heel seat Yand jaw, dowel-inserting mechanism located on the frame opposite the driving position, means operative when a heel is held at driving position for causing said dowel-inserting mechanism to place a dowel opposite the previously drilled hole in the said heel and to drive said dowel into said hole, means for advancing a length of wire, means for forming longitudinally extending ridges uponA said wire, mechanism for cutting it into dowel-,lengths and means for moving said dowels separately and successively into position in front of the retracted driver.

16. In a machine for dowelling heels, the combination ci a supporting frame, a turret shaft revolubly mounted thereon, a plurality of bodilymovable pairs of heel-holding members mounted upon said shaft in spaced positions in a circle about said shaft, each pair of heel-holding members consisting of a heel-receiving seat and a holding jaw opposite thereto, the units 4of one set of said members being separately movable towards the other member of the pair whereby a heel between the members of a pair so relatively contracted will be tightly held, means cooperatively connected to said turret shaft to progressively rotate it by a step-by-step lmotion whereby each pair, of seats and jaws will be successively moved to and stopped. at loading position, at drilling position and at driving position, means mounted on the frame and co-operating separately with the movable member of each pair or heel holders to advance said movable member to holding position before its pair comes to drilling position and to hold it advanced until its pair leaves driving position, means for retracting said movable holders when released from said advancing means, drilling mechanism located on the frame and having a drill in line vwith the drilling position and means for advancing said drill into and withdrawing it from a heel held vnism to place a dowel opposite the previously drilled hole in the said heel and to drive said dowel into said hole, means for advancing a length of wire, means for forming longitudinally extending ridges and laterally extending burrs upon said wire, mechanism for cutting it into dowel-lengths and means for moving said dowels separately and successively into oi the retracted driver.

17. In a machine fordoweling heels, the combination of a supporting frame, a turret shaft revolubly mounted thereon, a plurality of bodilymovable pairs of heel-holding members mounted upon said shaft in spaced positions in a circle about said Ashafteach pair or" heel-holding members consisting of a heel-receiving seat and a holding jaw opposite thereto, the units of one set of said members being separately movable towards the other member of the pair whereby a heel between the members of a pair so relatively contracted will be tightly held, means cooperatively connected to said turret shaft to progressively rotate it by a step-by-step motion whereby each pair of seats and jaws will be successively moved to and stopped-at loading position, at drilling position and at driving position, means mounted on the frame and coi-operating separately with the movable member of each pair of heel holders to advance said movable member to holding position before its pair comes to drilling positionl and to hold it advanced until its pair leaves driving position, means for retracting said movable holders when released from said advancing'means, drilling mechanism located on the frame and having a drill in line with the drilling position, means for advancing said drill into and withdrawing it from a heel held in the drilling positionby a co-operating heel seat and jaw, a dowel driver located on the frame opposite the driving position, a wheel having a plurality of spaced dowel-holding throats extending therethrough, means for moving said wheel to bring the dowel-holding throats successively into line with the driving position and between the retracted driver and a heel held at driving position,

means tov operate said dowel driverwhen a heel is held at driving position and means to successively insert a dowel into each of said throats when it is away from dowel-driving position.

18. In a machine for doweling heels, the combination of a supporting frame, a turret shaft revolubly mounted thereon, a plurality of bodilymovable pairs of heel-holding members mounted upon said shaft in spaced positions in a circle about said shaft, each pair of heel holding members consisting of a heel-receiving seat and a holding jaw opposite thereto, the units of one set of said membersv Ybeing separately movable towards the other member of the pair whereby a heel between the members of a pair so relatively contracted will be tightly held, means cooperatively connected to'said turret shaft to progressively rotate it by a step-by-step motion whereby-each pairoiseats and jaws will be successively moved to and stopped at loading position, at drilling position and at driving position, means mounted on the frame and co-operating separately with the movable memberl of each pair of heel holders to advance said movable 'member to holding position before its pair comes position infront ico to drilling position and to hold it'advanced until its pair leaves driving position, means for retracting said movable holders when released from said advancing means, drilling mechanism located on the frame and having a drill in line with the drilling position, means for advancing said drill into and withdrawing it from a heel held in the drilling position by a co-operating heel seat and jaw, a dowel driver located on the frame opposite the driving position, a wheel having a plurality of spaced dowel-'holding throats extending therethrough, means for moving said wheel to bring the dowel-holding throats successively into line with the driving position and between the retracted driver and a heel held at driving position, means to operate said dowel driver when a heel is held at driving position, means todraw wire from a coil of wire, means to straighten it, means to form longitudinal ridges upon said wire and to cut it into dowel-lengths and to successively insert one of said dowels into each of the throats of the dowel-holding wheel when the throat is away from driving position and means to successively insert a dowel into each of said throats when it is away from dowel-@driv-V ing position.

y19. In a heel doweling machine, the combination of a reciprocating dowel driver, heel-holders adapted to hold a bored heel opposite said driver,

a dowel .holding wheel having a plurality of throats adapted to be successively interposed between-the dowel driver and successive heels held before the dowel driver, means to draw wire from a coil of wire, means to straighten the wire, means to form longitudinal ridges upon the wire and means to successively insert a dowel length of the end of saidwire into each throat of theY dowel holding wheel when away from driving position and means to sever the dowel length of wire in such throat from the remaining wire.

20. In a heel doweling machine, the combination of a reciprocating dowel driver, heel-holders adapted to hold a bored heel opposite said driver, a dowel holding wheel having a plurality of throats adapted to be successively interposed between the dowel driver and successive heels held before the dowel driver, means to draw wire from a coil of wire, means to straighten the wire, means to form longitudinal ridges upon the wire and means to successively insert a dowel length of the end of said wire into each throat of the dowel holding wheel when away from driving position and means to sever the dowel length of wire in such throat from the remaining wire `and adjustable means for regulating the length of the dowels made by the machine.

WILLIAM JOHNSTON HUBBARD, JR'.

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