US2450065A - Drilling machine - Google Patents

Description

Sept. 28, 1948. H. J. wlLLMo'rT 2,450,055

' DRILLING MACHINE Original Filed Aug. 4, 1943 V3 Sheets-Sheet 1 'Figi' Sept. L28, 1948. H. J. wlLLMoTT v DRILLING MACHINE Inventor Herbert d W'Zlmozt 5 Sheets-Sheet 2 Original Filed Aug. 4, 1945 I Sept. 28, 1948. H. J, WILLMOTT 2,450,065

DRILLING MACHINE -5 Sheets-Sheet A3 Original Filed Aug. 4. 1943 QS NS IllJ Patented Sept. 28, 1948 DRILLING MACHINE Herbert J. Willmott, Beverly, Mass., assignor to United Shoe Machinery Corporation, Flemingu ton, N. J., a corporation of New Jersey Original application August 4, 1943, Serial No.

497,415. Divided and this application December 21, 1944, Serial No. 569,121

Claims.

My invention reilates to machines for drilling work of various kinds, it being herein disclosed as applied to the purpose of producing simultaneously la plurality of passages in a Wood heel held in place in the machine for the operation upon it. The present case is a division of the application led in my name in the United States Patent Ofce on August 4, 1943, and bearing the Serial No. 497,415, this having on July 10, 1945, matured into Patent No. 2,379,944. The invention has as an Aobject the provision of eicie'nt means for actuating, adjusting and determining the adjusted position of the drill or drills.

With the above object in view, a feature of the invention may be found in means by which a drill-mounting is reciprocated to obtain the effect of the drills upon the Work in its holder. An oscillatory lever is held against 'a rotatable cam by a spring, which forces the drill-mounting away from the work-holder. A reciprocatory carrier connected to the lever, as by a pair of links, has spaced abutment-portions between which the mounting extends and with one of which it contacts. A second spring engages one off the abutment-portions of the carrier and also the mounting, it being effective by its expansion to move the mounting toward the holder to cause the drills to enter the Work. There results a compalct organization by which the drills are yieldably advanced by an unvarying force and retracted at an runvarying rate, regardless of the depth of drilling.` The advancing force may, however, be adjusted to meet the requirements of dilerent kinds of Work by varying the distance between the elements engaged by the second spring.

As another feature of my invention, the depth of drilling is determined by the operator through means for readily and accurately varying the position of the drill-mounting with respect to the work-holder. A reciprocatory slide has movable upon it a secondary slide carrying the mounting, and a rod rotatable in the second slide is threaded into the rst and extends to the front of the machine, where it has a handle adjacent to the Work-holder. By turning this rod, and by virtue of its engagement with the two slides,

the position of the second slide upon the rst and, therefore, the normal relation of the drills to the work-holder, maybe altered quickly and with little eiort, to give lthe depth of drilling desired by the operator. Associated 'with the rod, where it may be observed readily, is means for-showing the depth of drilling, as by a nut threaded upon the rod and movableV along indicating means, and, to render the reading easy,

2 the indicating movement is multiplied, the two threads upon the rod being reversed in direction. As still another feature of the invention, there Vis lmeans by which the secondary or mountingcarrying slide is securely locked in whatever position it may be adjusted. In Ways in which this slide is adjustable is a space, in which a block or other member is movable into @locking engagement Withvthe slide. Means, as a spring, applies to the block a locking force which is independent of effort on the part of the operator, the action of the spring upon the block being through a lever, rpreferably of the toggle-type, which multiplies its effect. There is shown means for adjusting the effective pressure-angle ofthe toggle-lever. Means extending to the front of the machine, adjacent to the means through which the slide is moved, serves to release the slide-locking engagement, and may consist of a rod connected to the lever and acting to break the toggle against the force of the spring.

In the accompanying drawings illustrating a possible embodiment of the invention,

Fig. l illustrates my improved drilling machine in side elevation;

Fig. 2 is a top plan View of the means for setting and clamping the drilling head;

Fig. 3, a vertical sectional detail on thelline III--III of Fig. 2;

Fig. 4, an enlarged top plan View of the outer -end of the adjusting means for the depth of Agive arrangements corresponding toa particulai` design in which nails have been inserted in the heel-seat of a shoe to which the drilled heel is to be attached; driving lmechanism B by which the drills are rotated through flexible and extensible connections X permitting drill-adjustment; clutch, cam and fan mechanism C inter- Upon spaced rods 50, 50, fixed horizontally fromfront to rear in the upper portion of the frame mechanism C, osci-llates said lever. A roll 66 uponA the lever 62 engages the closed end of a thlmble EB, movable through a bore in a lug .lll depending from the slide 5ft. A spring l2 is seated in the thimble 53 with its opposite extremity in an eX- -ternally threaded thimble lll,y adjustable through.

an opening in the frame. By turning a nut'i upon the thimble M, there may be varie-d the force with which the spring urges a flange I'Hi upon the thimble ESS against the lug lil, and holds the vslide 55 in its normal position with the drills retracted. This position is determined by the ,coni tour oi the cam .69, in engagement with which the roll El is maintained by the spring. Between a lugl8 depending from the slide and a sleeve B sliding in the frame, a spring 82 is interposed. This last-mentioned spring is of such strength that it will resist the force necessary to advance thedrill-slide 54 for the production of the deepest openings to be formed in the work. It is under constant compression, its force being adjustable by rotation of a screw 84 threaded into the sleeve and against which the` outer end of the yspring abuts. The expansive force of this loaded spring 82 maintain-s the lug t8 of the slide in contact with a horizontal crossbar 86, bridged between a pairY of links S8, 88 pivoted to the upper end of the leverv 62. At their rear extremities, these links are joined at Sil, 9E! to thesleeve 89. The crossbar, the links and the sleeve move at al1 times with the lever and may be considered to be a portion thereof. They furnish a carrier for the spring 82. As. the cam 8|) oscillates the lever 62, its action upon the thimble 68 compresses the spring 12. This movement of the, lever-portion SIB in a direction away from the lug 7B permits the spring 62, by its engagement with the lug, to move the slide .iforward, so .the drills 58 act upon the work. If -any obstruction is encounteredby the drills or slide which oiers a resistancegreater than the maximum drilling force,` it merely causes the compression of the spring 82, and no injury to the elements of the machine will result. When the lever |32 is allowed by the cam 69 tobe swung back by the expan-sion of the spring l2, the slide 54 is retracted by the contact of the flange 1-5 with the lug 'Hl at a rate determined by the contour of the cam. This, and withdrawal of the drill-s from the work, will be rapid, so heating by idlerotation of said -drillswithin the work is minimized. The time of withdrawal m-ay be a relatively small fraction of that required for the operating advance. Since the lug I8 and crossbar 85 and the screw Si, which furnish the abutments for the opposite endsof the spring 82 move together with the lever 52, the resistance tocompression vof said spring is `unaffected by the depth of drilling; The action of the drills isvtherefore more uniform, and bo-th the springs-12 and'82 maybe of less strength th-an if 'the screw 84 were anormally fixed abutment. Since the operating force is applied to the drills through the spring 62 and they are retracted by the spring 12, their movement in both directions is cushioned and all shocks absorbed to give smooth reciprocation of the main slide 54.

To provide for drilling heels to dierent depths, the position of the mounting head 5% upon the main slide 5S, is variable. For this purpose, the mounting is fast upon an intermedi-ate or secondaryslide 92 movable in ways 94 upon the main slide. Thel connection of the mounting to the slide 92 may be by screw-s Q5, which pass with some clearance through openings in the connected elements. Thus is furnished a transverse settingfup adjustment for the drills 58. At the underside of the secondary slide is a lug 9S, in which-.turnsga.rodea-having collars Hill, ist xed toitat oppositesides of the lug7 and threaded into the main slide at 92, this thread being right- .hand When the rod is turned by a hand-wheel I'Mupon' its-forward extremity, the secondary 'slide-andthe mounting 5S with the drills are adlusted -todiierent initial distances from the work, so the unvaried travel of the main slide will carry the .drills into the werkte a greater or less.ex tent; The hand-wheel is at theqfront Of the ma chine, convenient for manipulation by the operator'a's he supplies to `the clamping mechanism D the rheelsto be drilled. In its adjusted position, theseccndary slide is locked by engagement of a block' H26, movable upon the main slide 5i through aA space at one side of the ways 94 and forced against the secondary slide. This movement of the block is effected by a toggle-lever, one link |08 of--which is pivoted to it at l lll, the other link rI l2 beingpivoted to the iirst and also to th-e m-ain'slideat H4. The pivot H4 is furnished by an eccentri-cywhichmay vbe rotated to differ-ent positions, and is'secured by a screw H6. This. to facilitate setting up `the machine and to take up weanpermitsthe establishment between the lin-ksyof the toggle-lever of an angle giving the maximum or desired eiciency, when the block is in looking engagement with the secondary slide. The center -of the l'toggle is forced toward an ladjustablestop-screw H8 into locking relation by anexpansion-spring I 2B surrounding a rod |22 pivotedlto an arm |24 extending from the togglelinky ll'above the link l I2. This locking a-ction is 'entirely independent of effort on the part of the operator and 'therefore is uniform. The spring isinterposed between a bracket |26 projecting from the-main slide and a shoulder |28 upon the rod.A To'unlock the slide Q2 for adjustment, the rodV |22isdrawn out 'by a handle |353 at the front offrire-machine adjacent `to the hand-wheel lili, breaking the toggle and withdrawing the block |06 from its locking position, to which it has been urged bythe spring |2.. With the secondary slide thus freed, the mounting head 5-5 and the drills maybe-moved tothe desired positions by rotation of "the hand-wheel. Unless the rod |22 is drawn out while the adjustment is being made, the secondaryslide is at all times held locked ready for the drill-ing operation. As the block lll thus securesthe 'l secondary slide, it forces said slide against the opposite side of the waysv 94. In so doing; it takes up all lateral play and maintains -thes-drilsffinthe correct relation to the clamping mechanism C for all depthofdrilling adjustrn'enizaf "Iotguide*theloperator` in making the adjust `ment -of'the drills, there projects from the main slidez'dithrough .an opening in the frame about thezrod 198,Y a' tube l'f'terminating adjacent to the hand-wheel Ille; The tube iscut away along its-upper side, and'its edge is graduated at |345 in fractions :of .an inch. Guided in the tube along the graduated-opening is an elongated nut |36 engaging'- the rod 98.by a left-hand thread, the

reverse of that between the rod and the slide 54. A projection |38 from the nut into a longitudinal groove |40 in the tube prevents the rotation of said nut. As the rod 98 is turned to produce the adjustment of the slide 92 and the drill-mounting 56 on the main slide, the forward extremity of the nut travels along the scale, indicating the depth of drilling for any setting. The reverse threading of the rod into the nut and the slide multiplies the indicating travel of the nut, so the scale may have longer gradations and be more easily read. To allow an adjustment of the Zero position of this gaging device, the tube |32 is clamped in the main slide 54, with a capacity for longitudinal adjustment, by a wedge |42. The Wedge is guided in said main slide and bears against the tube. It is forced into locking engagement with said tube by a screw |44 threaded into the wedge and rotatable in the` slide 54.

In the use of the machine, a heel to be drilled is applied to the clamping mechanism D. If the drilling design is to be altered from that of the previous operation, the arrangement of the drillchucks K is changed by the mechanism A. If the depth to which the drills 58 are to penetrate the heel is also to be altered, theoperator actuates the rod |22, relieving the toggle-lever |08,'| i2 of the pressure of the spring |20, thus freeing the secondary slide 92 from the locking action of the block |06. The hand-wheel ||34 is then turned until the reading furnished by the relation between the nut |36 and the scale |34 shows that the movement Iof the drills by the main slide 5G will carry them to the desired depth in the clamped heel. Then, the rod is released to secure the secondary slide upon the main slide under the force of the spring |20.v To whatever point the slide has been adjusted, the pressure of the locking block |06 holds it inthe true position in its ways, without the possibility of lateral play. Now, by depression of a treadle 362, the clutch mechanism C and driving mechanism B are put into operation for a single cycle, to rotate the chucks K and their drills 58, and to turn the cam 6|) to oscillate the lever B2 and reciprocate the main slidewith theadjusted drills. The drills are caused to penetrate the heel wholly under the expansive force of the loaded spring 82, this being suilicient to effect the operation to the chosen depth, but providing for yield if an obstruction is encountered.

After the advance of the drills has been completed, they are withdrawn from the heel under the force of the spring 12 and at a rate determined by the contour of the cam 60, the speed of movement being such as to prevent overheating during the idle travel of the drills in the heel.

The drilled heel may now be removed from the clamping mechanism.

Having described my invention; what I claim as new and desire to secure by Letters Patent of the United States is:

1. In a drilling machine, a frame, a' member slidable in the frame, a spring interposed between the frame and member, a lever against which the member is urged by the spring, a rotatable cam against which the lever is held by said spring, a sleeve guided in the frame, links joining the sleeve to the lever, a crossbar connecting the links, a drill-mounting movable upon the frame and havingr a portion engaging the crossbar, and a spring interposed between the sleeve and mountingportion and acting to urge said mounting-portion against the crossbar.

2. In a drilling machine, a frame, a drillmounting movable upon the frame, a thimble variable in position in the frame, a thimble slidable in the' drill-mounting, a spring interposed between the thimbles and by which the slidable thimble is urged into actuating engagement with the mounting, a lever against which'the slidable thimble is urged by the spring, a rotatable cam against which the lever is held by said spring, a sleeve guided in the frame, a screw threaded into the outer end of the sleeve, links joining the sleeve to the lever, a crossbar connecting the links and engaged by the mounting, and a spring interposed between the sleeve and mounting and acting to urge said mounting against the crossbar.

,3. In a drilling machine, a work-holder, a slide movable toward and from the work-holder, means for reciprocating the slide, a second slide movable upon the rst, a mounting carried by the second slide for. the reception ofV drills to act upon the work in the holder, a rod rotatable in the second slide and threaded into the first slide, said rod extending to the front of the machine at the Work-holder and being provided with a handle by whichr it may be turned to vary the position of the second slide upon the first and the relation of the drills to the work-holder, and means surrounding the rod adjacent to the handle and movable along said rod as the distance between the second slide and the work-holder is varied to indicatethe depth of drilling.

4. In a drilling machine, a work-holder, a slide movable toward and from the Work-holder, means for reciprocating` the slide, a second slide movable upon the rst, a mounting carried by the second slide for the reception of drills to act upon the work in the holder, a rod rotatable in the second slide and threadedv into the first slide, said rod extending to the front of the machine at the work-holder and being provided with a handle by which it may be turned to vary the position of the second slide upon the first andthe relation of the drills to the work-holder, the rod being threaded adjacent to the handle, a tube projecting forwardly from the rst slide-and surrounding the rod, and a non-rotatable nut movable longitudinally within the tube and engaging the thread at the handle, the nut and tube having co-operating means indicating the depth to which the drills will enter the work in the holder.

5. In a drilling machine, a'work-holder, a slide movable toward and from the work-holder, means for reciprocating the slide, a second slide movable upon the iirst, a mountingV carried by the second slide for the reception of drills to act upon the work in th'e holder, a rod rotatable in the second slide and threaded into the rst slide, said rod extending to the front of the machine at-the work-holder and being provided with a handle by which it may be turned to vary the position of the second slide upon the rst and th'e relation of the drills to the Work-holder, the rodV adjacent to the handle having upon it a thread which is the reverse of that between th'e rod and the secondv slide, a tube projecting forwardly from the rst\slide and surrounding the rod, and a nonrotatable nut movable longitudinally within the tube and engaging the thread at the handle, the nut and tube having co-operating means indicating the depth to which the drills will enter the work in the holder.

6. In a drilling machine, a work-holder, a slide movable toward and from the work-holder, means for reciprocating the slide, a second slide movable upon the rst, a mounting carried by thesecond slide for the reception oi .irills to act upon the work in the holder, a rod rotatable in the second accadde slide and. threaded .'.into-:theiflrst: slide;l :said-,1 rod' extending to'. thev fronttof" the' machine at* the Workzholder and being: provi'dedll with; a .handle byfwhich '.it` may be .turned .tov vary-the.; position ofrthe .second rslide* uponpth'e ,'rst andi the: relation offthe. drills,` to"A the work-holder; therrod' being threaded adjacent: toy the handle; a tube proj ectingforwardly :from tlie-=flrst slide and sur.; rounding the rod, a non-rotatable nut movable longitudinally withinthe tub'ezand.l engaging the threadrat thehandle, ther nut andztubef having Co-Qperating means indicating the depth towhich the drills. Will enter the :workin the ,holden and means toclampntheftube-.n the-second slide .in different positions along therod to :vary the .relationzof the vportions of the'indicating'f'means upon the'tube .and nut.

7. v.In .a drilling machine,.alworlholden a slide movable toward. and from the Workholder Vand provided with Ways Vinwhich .is la space, means for reciprocating the slide, asecond slide variable in .position in :the Ways,. a: drill-mounting carried bythefsecond slidexto actA upon Work inthe holder, means'extendingtoth'e front of the-:machine at thevvorkeholder for Kmoving'theisecon'ol 'slide upon the :second slide toact upon work in fthe holder, i

means: for moving the secondslide'upon th'erst to1vary the .relation ofthe drillsto said'holder, ablockrniovable in the space in ,the-ways for locking. .engagement with the second' slide, a lever pivoted to thefirst slide and to the b1ock,'a spring acting upon the lever toforce the'block into lock` ing engagement With the .second slide, `and means movable by theoperator tofree the lever from the force-'of the spring.

9; In' adrillingfmachine, a workeholden a slide movable towardandlfrom the Work-holder and provided 'with ways inwhich is a space, meansfor reciprocating the-slide, a second slide variable in position inthegv/"ays,` va .drill-mounting icarriedflo'y thefsecond slideto act upon vvorlrin` the holder; means lfor.v moving the second 'slide' upon the -flrs't to vary the relationof the drills to saidholden-a member guided inthe space in the ways for locke ing engagement with the second slide, a t0gg1eleverpivoted tothe first slide and to the block, a spring acting uponthe toggle-lever to; .force the blockinto locking engagement with thesecond slide, and' means for varying the position 'ofxthe pivotal connection of the toggle-leverA to the first slide.Y and thereby, the effective pressure-angled said toggle-lever.

10'. ,Inxa drilling machine, a Workeh'olde131a1s1de movable toward and from the Work-holder:and providedwith Ways in which is a space, means for reciprocating the slide, a second slide variable in position in the'ways, a drill-mounting carried'by thesecond slideto act upon work in the xholder, means formoving the second slide upon'thesrlrst to: vary the relation of the drills to said holder, a block guided in the space in the Ways for locking engagementwith the second slide, a" toggl'eele'ver pivoted tothe nrst slide and to the block, a' rod connected to an armof the lever and extending toithe, front of the machine at the vvorkeholder.,l anda spring interposed between the [rod and the Vfirst slide and acting to straightenthe toggle The following references are of record inthe file of vthis patent:

UNITED STATES PATENTS Number Name Date 611,811 Hormby Oct.'4, 1898 1,195,852 Purdy et al Aug. 22, 1916 1,210,450 Fox Jan. 2,.1917 1,237,017 Buhr Aug. 14, 1917 1,255,114 Drach Jan. 29, 1918 V1,482,979 Fagan Feb. 5, 1924 1,596,258 Tessky Aug. 17, 1926 1,693,253' Riddell Nov. 27,1928 1,858,898 Mesker May 1'7, 1932 .1,933,213 Guild Oct. 31, 1933 2,018,553 Hallenbeck Oct. 22,1935 2,174,860 Montgomery Oct, 3', 1939 2,326,073 Seyierth Aug. 3, 1943 2,349,324 Wiedmann May 23, 1944 FOREIGN PATENTS Number Country Date 4,099 Great Britain Feb. 18, 1898

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