US3000238A - Cloth drilling device - Google Patents

Description

Sept. 19, 1961 T. G. MALUF CLOTH DRILLING DEVICE Filed Feb. 2G, 1959 INVENTOR Zar/Af fief/a /l/z a;

54 55 BY W/ w 55 W ATTORNEY United States Patent O 3,000,238 CLOTH DRILLING DEVICE Tauk Gabriel Maluf, 798 Juniper Drive, Logan,

Filed Feb. 26, 1959, Ser. No. 795,753 12 Claims. (Cl. 775) Utah The present invention relates to a means for making reference points on multiple plies of cloth for mass production tailoring operations, and more particularly relates to a new cloth drilling device including a novel cloth drill jig utilizing an improved apparatus for accurately drilling reference points through all plies of multiple layers of cloth.

For good lit and well made appearance in clothes manuiacturing, one of the more important requirements is that certain critical reference points for sewing be accurately marked on the cloth: eg., the apex of a dart, the corner location for pockets, the position for buttons and correspending buttonholes, etc.

In the tailoring of hand-made or single garments this is accomplished by simply marking those reference points with a pin, thread, chalk, or punching them with the point of an awl or scissors.

The economics of large volume mass production, however, long ago forced manufacturers to look for and adopt other ways to make these location points. Since it is customary in this type of production to spread several layers of cloth (sometimes in the hundreds) for simultaneous cutting of all plies, it is desirable to make these points simultaneously in all plies prior to cutting. This is usually done with an electrically driven cloth drill which makes a small hole in each ply of cloth as the drill bit is forced down through the bed of cloth. Another method uses a device like a needle which pushes a piece of thread through all the layers at the spot being marked. A third, and more recent method involves the use of iluorescent dyes, which when viewed under black light lamps made the glowing marks easier to nd.

In practice, however, the problem has proved more dileult to solve than it would seem; and none of these prior methods can be relied on to mark with sufficient accuracy the proper location of the reference point on each ply of cloth in the bed. Generally, with a thick bed of cloth, the plies near the bottom are drilled with a substantial degree of inaccuracy that is unsatisfactory, and the thicker the cloth bed the greater the degree of inaccuracy.

In an eifort to overcome this problem, the industry has resorted to several expedients. The most common is to use more rigid, carefully leveled spreading tables, which are supported on adjustable steel legs, and in some cases braced with trusses. Also, the electric drills have been equipped with sensitive spirit levels mounted on the drill base plates. For reasons that will become apparent later, these efforts to attain absolutely level conditions for drilling, have been only partially elective. There is still no assurance that all marks will lbe drilled accurately on any given piece of a garme t-the most critical might be the worst. Nor is the degree of error predictable for any given mark, so that it can be allowed for and compensated by the operator who uses the mark as reference.

The industry has learned the hard and expensive way that it is not safe to rely completely on the foregoing methods. Hence, for the more critical reference marks, it has of necessity sought other more reliable ways to Patented Sept. 19, 136i ice button and buttonhole machines, but this oifers substantial opportunity for human error, since it depends on sight and touch. Also, these guides must be pre-set to a predetermined regular spacing, thereby introducing another source of error.

A more recent development device marketed by the leading sewing machine company for its buttonhole machines, and presently designed for shirts or pajama tops only. The garment is clamped into the device, and when activated it will automatically position the shirt for each succeeding buttonhole. lt does this according to the setting of pre-set stops, in a way believed to be something like the tabulator on a typewriter. This device might be a good means for overcoming the problem insofar `as buttonholes are concerned, but it does not also simultaneously mark the corresponding position for each butto-n von the other side of the garment.

The above-discussed worrisome manufacturing problem of marking reference points on cloth in volume productionespecially the unsightly misalignment of buttonront garments-has been a source of concern to applicant and others in the industry for many years.

It is a primary object of the present invention to provide a novel cloth drilling -device which achieves a practical, reliable, low-cost solution for the above long-standing problems, yand practically eliminates the opportunity for mechanical or human error which has been so prevalent heretofore.

Heretofore, efforts to solve the above-discussed prob-Y lems have utilized methods and equipment for truing both the bed and the drill to the earths center, by means of levels, but this has been unsatisfactory as above pointed out. ln fact a recent eifort to solve these problems was to ignore the spirit levels on the cloth drill and try to let the drill adjust itself naturally on the top of the bed of cloth. The principle of the present invention, however, is quite different; namely, the cloth drill and the bed of cloth are arranged so as to force the cloth bed to assume an attitude that is perpendicular to that of the drill bit during its penetration for marking purposes. This is done with a novel cloth drilling jig according to the present invention, which includes two rigidly parallel plates (or like supporting means) separated by sufficient space to accommodate a bed of cloth yas thick as the maximum penetration of the bit on the cloth drilling machine. The upper plate or supporting means holds land orients the drilling machine and its drill bit, and the lower holds the cloth bed squarely with respect to the drill bit to assure perpendicular penetration. 'I'his invention, as amplified and described below, has proven to be the long-sought solution to this old problem in the industry, and makes it possible to get consistently accurate reference points on every ply of cloth in the cloth bed, despite all the formerly impeding factors which have plagued the industry for so long.

Another important object of the present invention is to provide a novel cloth drilling device which includes simplied means for universally adjusting the base of the A faster andv cheaper `alternative is to mount spacing guides on the is an automatic spacing epesses cloth drill with respect to the cloth bed. tov insure perpendicular penetration of the latter by the drill bit, even when the drill bit axis is slightly canted with respect to the drill base as is often the case, whereby all plies of a thick cloth bed consistently can Ibe drilled accurately to Within the `drills 3/32 of an inch diameter, which is a very close tolerance for this industry.

A further object of this invention is to provide a novel cloth drilling jig which is Flight but has great rigidity, and is portable so that the drill can be easily worked with on any part of a cloth cutting table. Itis -a related object to provide such ya novel cloth drilling jig incorporating track members which lirmly support the cloth drill but that the drill can be position;

by it is possible to reach and drill all reference marks on cloth as wide as 42 inches, which is the common maximum width used in the mass production of clothing.

Still another object of the present invention is to provide such a novel cloth drilling jig incorporating in the base thereof a replaceable drill pad of resilient material 'which supports the bottom plies ofthe cloth bed, thereby assuring accurate penetration, and simultaneously protects the work table from becoming pock marked by the drill.

The yabove and other objects and advantages of the present invention will become yapparent from. the following description thereof and appended claims with, reference to the accompanying drawing wherein;

FIGURE 1 is a perspective. view showing the. new cloth drilling combination of the present invention, including my new cloth drill mounted thereon;

FIGURE 2 is a front view of thenovel cloth drill jig of this invention which is shown inA FIGURE l;

FIGURE 3 is a side view of the,- novel cloth drill jig of this invention;

FIGURE 4 is a top view of the new clothv drill jig of this inveniton, with the cloth drillremovedg. and

FIGURE 5 is a section taken. along line-,5 5 in. FIG- URE 4.

Referring to the drawings, there is shown in FIGURE V1 the novel improved cloth drilling apparatus of the present invention including. my novel cloth drill jig indicated generally by the numeral 10, havingsupponted' thereon a conventional cloth drill indicated at 12.

'Ihe drill jig 10. comprises a rectangular base plate14, which in a usual embodiment is about 111 inches wide by Ztl-24 inches long, with the base 14 having narrow elongated slot 16 as shown in thedrawing. A pair of upright support posts 18 and 20, preferably formed of angle iron, lare secured to the base 14 perpendicular thereto, by any suitable means such as welding. The. upper portion of one side of` each angle iron 18Y and 20v is cut away leaving shortened back sides 22 and 24, for a purpose hereinafter explained. For added rigidity, a cross piece` 25 is secured to angle iron back sides 22 and 24 near the base thereof, by welding or like means. (The cross pieceV 25 could be formed as part of the base plate 14, turned at right angles thereto.) A vertical elongated slot 28 is provided in the side of post 20, Vand in post 18 at26.

A drill support platform is supported. in` cantilever fashion on posts 18 and 20, extending over the drill jig base 14 and substantially parallel thereto. In the preferred disclosed embodiment, this platform is comprised of a pair of angle irons 30 and, 32, each secured at one end to one of opstanding supportpostslS .and 2;! by a bolt 34 and 36 passing through adrilled hole in the vertical side of each of angle irons 30 and 32 and the elon- 4 gated slots 26 and 28 in each of the upright supports 18 yand 20. At its other end, a short section of the horizontal portions '31 and 33 of each of angle members 30 and 32 is cut away, and the vertical section is folded in at right angles to yform a pair of lugs 38 and 40. Each of lugs 38 and 40 is drilled, and they are connected by Ia metal strap 42, and bolts or rivets 44 land 46 extending through holes drilled in the ends of strap 42.

A strut support system, made up of two like struts 47, is provided to suspend the free end of the drill platform formed by angle irons 30 and. 32. Each strut '47 includes an elongated rod 48 formed like an eye bolt at one end, which is secured to the vertical side of angle iron 30 by a rivet, or bolt, indicated at 50,.with the other end threaded at 52 received in one end of a turnbuckle 54; Iand a similar shorter rod 56 shaped like an eye bolt secured at one end to the side of vertical post (118 or 20) by a rivet, or screw and nut 58, with its other threaded end received in turnbuckle 54. The struts 47not Vonly support the free end of the drill platform formed by angle irons 30 and 32, but also serve as an 'adjustment means for assuring accurate alignment of the drill platform and of the drill bit with respect to the cloth bed 70 by means of the turnbucklesY 54.

As will be 4apparentfrom the drawings, the angle irons 30 and 32 are positioned so that [their horizontal portions 31 and 33 provide drill supporting tracksy substantially in the same plane and parallel to jib base 14, with side guide rails to retain the base 62 of the drill 12. This provides a steady support for the cloth drill 12 without having to bolt it down, and the drill can be placed or easily movedv anywhere along the tracks Iformed by the angles 30 and 32 to the desired position for location of the drill. bit 64. Upon operation of the` drill handle 66, bit 64 is caused to travel downwardly through the aperture 68 in drill base 62 and between the channels 30 and 32, to penetrate the built up cloth bed shown at 70 in FIGURE 3.

If the drilling machines drilled squarely to their base. then the drilling jig 10 of the present invention would -need only two rigidly parallel supporting surfaces one a platform for the drillY '12 and theV other for the bed of cloth 70 beingV drilled. However, as a practical matter, the drilling axis of drill |12,A and the penetration angle of drill bit 6.4, are not` necessarily at right angles. to the plane underside of drill, base 62 for every drilling machine. It is` therefore necessary, as a practical matter, that the cloth drill jig of. this invention have a means for adjusting the attitude ybetween. the drill platform and jig base 14 to insure perpendicular penetration of the cloth `bed 70 by the bit 64 so that all layers of clothv inthe bed 70 will be perforated squarely and marked accurately by Abit 64. (Squarely is used. here to distinguish from the concept of verticalA perpendicular penetration in the sense of plumbj which principle has been utilized heretofore Without satisfactory results and is avoided with the cloth drill jig 10 of this invention.) Adjustability to insure perpendicular penetration of the cloth bed by the drillbit could be accomplished by three different approaches: (a) By adjusting the tilt of the drill platform to square the line of the drill bit penetration to the controlled attitude of the cloth bed 70. This is the preferred approach used in the disclosed embodiment of my drill jig 10. (b)v Another approach is to provide means for adjusting the cant of the cloth supporting surface (that is, the jig base 14, or a like rectangular drill pad supported on base 14)V to square that surface With the line of bit penetration inherent in the drill being used.V This is not as feasible as the preferred approach off my disclosed embodiment. (c) Still another approach is to adjust the angle of the drill base 62 with respect to the drill bit. 6.4, for use. with a jig having a drill support platform providing a support plane parallel to the surface of drill jig base 14, so, that the bit 64 penetrates the cloth bed 70 at right angles. This, however, also is not as feasible or satisfactory as my preferred embodispaanse ment. (It would appear this third approach could alternatively provide a true-drilling drill, Without the use of a drill jig to control the attitude of the cloth bed 70, according to the present invention; however, such drilling would be subject to the vagaries of the many factors including varying cloth pliancy affecting plumb, and to human error, such as experienced heretofore.)

In the novel drill jig of this invention, the abovedescribed adjustment means (slots 26, bolts 34; 28 and 36; turnbuckle trusses 47) make the plane of the platform supporting the drill base 62 universally adjustable, so that the line of penetration of the drill bit 64 is likewise universally adjustable to achieve true perpendicularity between the drill line of bit 64 and base plate 14, thereby insuring perpendicular penetration of the cloth bed 70 and accurate marking of all plies by the drill bit. By moving bolts 34 and 36 in the oversize holes 26 and 28, each support track 30 and 32 can be raised, lowered or pivoted independently of the other, with'appropriate adjustment of the turnbuckles 54, which also make possible small positive up and down adjustments on each side of the drill base platform. Lock nuts 5S .'are provided for locking each turnbuckle 54 against thread play and rotation, and thus securelyhold the drill `platform in desired adjusted position.

Making truss rods 48 and 56 an integral part of the 'adjusting turnbuckle 54 and connecting their ends directly to the angle irons 30 and 32 and the upright posts 1S `and l20, respectively, makes it possible to achieve a small positive adjustment; this construction is superior to use turnbuckle secured to the upright 18 angle iron 30 (or 32) by =of a conventional =(or 2G) and the horizontal means of intermediate straps.

With the above-described cantilevered drill platform, with strut supports, it is possible to make my novel drill jjig 10 with a long span so that the operator can reach all marks without diiculty on cloth widths running as high as 42 inches, which is the usual maximum for cloth :used in volume production. Sometimes wider widths of lcloth are used, and it is possible to construct a drill jig 10 having a drill supporting platform of longer' span.

The drill supporting platform could be made of an upper plate similar to base 14, connected at one end to the vertical support members 18 and 20, by welding, or with rivets or bolts, with a suitable slot similar to slot 16 in base plate 14 to permit passage of the drill bit 64. However, the angle iron construction above described 'is preferable, as it provides a rigid but light jig, and lends itself more readily to incorporation of means for universal adjusta'oility of the supporting platform for drill base 62, and thus of drill bit 64, with resepect to base plate 14.

A drill rest or platform similar to the base plate 14 could be mounted on rails, such as light-weight pipe to permit movement of the drill completely across the cutting table, but this would make my drilling apparatus unnecessarily unwieldy, since the above-described embodiment shown in FIGURES l-5 of the drawings has sufficient reach for marking cloth widths commonly used in volume production.

In a typical version of the drill jig 10, the tracks 3i) and 32 are spaced apart in substantially parallel relation to accommodate the base of a conventional cloth drill such as an Eastman drill, 'which has a base 62 about l() x l0 inches. The drill jig 1) can be made with a platform wide enough to take the largest commercial drill base. lf made with angle members like 30 and 32 they can have wider horizontal sides 31 and 33 to keep drills with smaller bases from falling through; or can be made with a suitable adapter such as a plate similar to base plate 14 mounted on the horizontal sides 31 and 33 of the angles 30 and 32, tokeep the smaller base drills from falling through.

It is desirable to incorporate a removable pad 72 of -resilient material, such as tempered Bakelite, in the slot 16 towards the upstanding posts 18 and 20;

of drill base 14, as this accomplishes several desirable results: (a) It eliminates the possibility of sag of the bottom of the cloth bed 70 into the slot 16, which might be significant with flimsy cloth like voiles. (b) It permits the jig base 14 to slide laterally more smoothly under the bed of cloth. (c) It insures penetration of even the bottom ply of the cloth by the drill bit 64, without fail. (d) It prevents marring of cutting tables when they have wooden tops, or the blunting of drill bits when the cutting tables have metal tops. The problems of insuring penetration of the bottom plies of the cloth, and/ or preventing marring of the cutting tables by the drill bit have heretofore been coped with in some factories by sliding a thin board under the spot being drilled, and in others by just letting the tops of the cutting tables get pockmarked and then refilling and finishing them when they get too slivery. The provision of the removable drill pad 72 in my novel cloth drill jig 10 very nicely solves these long-standing problems and is another advantage of this invention.

Method of operario .-After the bed of cloth 70 has been built up to the desired number of plies, and the traced marker or cutting patterns are properly positioned and fastened on top of the bed, which is usually clamped by suitable means, the next operation generally is to drill the marking holes in the cloth bed at the required reference points. With the drill jig 10 of this invention, that is done as follows: The bottom plate 14 of the drill jig 10 is slid longitudinally under the bottom layer of cloth bed 70, next to the cutting table surface 74, and the jig 10 is slid sideways to the general area requiring drilling'. The electric drill 12, which is connected to the power supply, is placed on the drill jig 10, with its base 62 on the tracks 31 and 33 of angles 30 and 32; and both the jig 10 and drill 12 are then maneuevered so as to bring the tip of the drill bit 64 directly over one of the reference points requiring drilling. The drill handle 66 is then operated to depress the drill bit 64 until it has achieved full penetration of the cloth bed 70, and passes into the drill pad 72, after which the drill bit `64 is withdrawn. The drillandjig assembly are then moved to the next position and the drilling operation is repeated. This is done as many times as necessary, going down one side of the cutting table and back the other, until all reference points that require it have been drilled. In thevevent that some reference point is beyond the reach of the drill, for example, when oversized width of cloth is being marked, the point can be left until later when some intervening garment piece has been cut out and removed thus putting the reference mark within reach of the drill bit.

Drill 12 can of course be mounted on the drill jig tracks 31 and 33 inverted 180, with its post 13 disposed this is usually preferable since the Weight vector of the drill is then located near posts 18 and 20. The upper portions-of back sides 22 and 24 of posts 18 and 20 are cut away, as previously noted, to just below the lowest level of horizontally disposed tracks 31 and 33, so that drill base plate 62 may be slid along the horizontal tracks 31 and 33 beyond posts 18 and v20 when necessary or desirable. This also makes it possible to slide the drill 12 onto tracks 31 and 33 from the left end of the jig 10 in FIGURES l and 3, if desired. The upper portions of posts 18 and 20 can be strengthened against bending by impressing a longitudinal depression (similar to a corrugation), if desired.

It will be noted that certain variations of the abovedescribed construction of my novel drill jig 10 can be made without departing from the essence of the invention; for example, the sides of upright legs 18 and 20 could be made of tubular posts which are drilled, with elongated slots corresponding to slots 26 and 28 provided in the upright sides of the angle members 30 and 32, etc.

The above-described novel drill jig 10, utilized with a conventional cloth drill 12 as herein disclosed, practically eliminates the opportunity for human or mechanical error spouses in vthe cloth drilling marking process. This has been proven by actual every day productive use, in `which the cloth drilling apparatusand method of this invention has been found to'give accurate marking to within Vthe dn'lls 9&2 vof an inch diameter, which is a very close tolerance for this industry. `Moreover, the novel drilling apparatus of the present invention "has Vbeen found accurate regardless of the type of cloth being drilled, Aregardless of whether or not the lcloth is spread on a level table, and regardless of the depth of the Ycloth bed. Even the bottomply of ,a thick cloth bed comes out marked in exactly the same Vspot as the top ply, with only reasonable precautions and initiatory adjustment, and minimum expenditure of labor. Further, the laccuracy of the cloth drilling apparatus and method herein disclosed using a conventional cloth drill 12 Vfor marking is Vwell within the accuracy tolerances of the cutting and sewing processes which follow `markingjin the manufacturing sequence.

in View of the Avirtually absolute reliability-obtained by the novel cloth drilling apparatus of the present invention, it is no Ylonger necessary to hand mark or use spacing guides as -it was heretofore. Substantial labor 'savings can therefore be effected which pay the investment for a drill jig according to this invention, vwith production `ofthe first hundred dozen garments marked with it. Furthermore, there are substantial indirect gains and savings from the reliability and accuracy of markings with the apparatus and method of the present-invention. For example, sewers no longer have to Ytake extra time-in vtheir operations `to adjust the positioning of pockets, or to conform or compensate 4for variations of inexactly marked 'reference points or Athe like. Y

It'w'ill thus Abe apparent that the novel drilling apparatus .of the Vpresent invention accomplishes all ofthe above- 1stated objectives and advantages and solves a long-stand- Aing problem inthe clothing industry, which has not hereitofore been met `satisfactorily vin spite of many elorts to do so.

The invention may 'be embodied in other specific forms `without vdeparting from the spirit or essential characteristics thereof. The present embodiments are therefore to `vbe considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than `by the foreging description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to vbe embraced therein.

What-is claimed vand desired to 'be secured Aby United States Letters Patent is: t

l. vA cloth drilling apparatus comprising: a `base with a-work surface adaptedto receive a bed of cloth; at least one support member extending upwardly from said base; platform Ameans `mounted on said support member and extending Vover said base; a cloth drill having a base plate with arplane underside mounted yon lsaid platform means; said platform means and said worksurface being oriented with respect to each other so that the drilling axis of said 'cloth drill is perpendicular to said work surface; and means for adjusting the orientation of said drill platform means andsaid work vsurface with respect to each other, to vthereby ,adjust the drilling axis of the drill to -a line perpendicular with lsaid Work surface, if said drilling axis is canted with respect tothe underside lof the drill base.

2. A drill 'jig comprising: a'base plate having a dat work surface; a Vplurality of spaced support posts extending upwardly from lsaid base plate; a platform for supporting la cloth drill with the drilling axis thereof perpendicular 'to said work surface, said platform being Vmounted Iat one-end on said support posts and extending over said base plate vsubstantially parallel thereto; Vand additional platform support means connected between ysaid support posts and said drill platform -adjacent its 'free end.

'3. .Adrill jig as defined in claim /2, which has a pair of lsaid Aspaced support posts, with said drill platform base aperture,

including a pair of members each secured at one end to one of said'posts and vhaving flat drill support surfaces lying in a substantially common plane which is substantially parallel to said dat work surface; said additional platform support means including a pair of struts, yone each connected between one of said support posts and one of said platform members adjacent its free end.

4. A drill jig as defined in claim l3, further comprising means for linearly and angularly adjusting the Vposition of each of said platform members with respect to said work surface so that the drilling axis of a drill mounted on said platform can be adjusted perpendicular to said flat work surface, if said drilling axis is canted with respect to the drill base.

5. A drill jig as defined in claim 4, said adjusting -means including: a pin and slot connection between each support-post and the end of the platform member supported thereon, permitting translation of said platform member with respect .to the jig base; and turnbuckle means ,for adjusting the length of each of said strut members.

6. A drill jig as defined in claim 2, having a `pair of spaced support posts, with said drill platform including a pair of angle irons, each secured at one end to one of said support posts, with one side of the angle irons lying in a substantially common plane which is substantially parallel to said flat work surface and the other side of each angle iron lying in a plane substantially perpendicular thereto, and a transverse member connecting the free ends `of said angle irons maintaining them in substantially parallel spaced relationship, whereby said irons form ka track with said last .mentioned sides adapted to retain the base of a cloth drill while permitting movement along said track.

7. A drill jig as defined in claim 6, whereinthe top of .cachot said support posts is cut away to a point adjacent the ends of said angle iron sides which are parallel to the jig base, so that the base of a drill mounted on said tracks formed by said angle `irons can overhang said support posts.

8. A cloth drilling apparatus as definedin claim 6 further including a cloth drill mounted on tracks formed by said angle members, with the drilling axis thereof perpendicular to said work surface; and adjustment means :for setting said drill axis perpendicular to said work surface, said means being locked to maintain said drill raxis position.

9. A cloth drilling apparatus as dened in claim 8 wherein said work surface is on said base ofthe drill jig Vand is provided with an aperture to permit the cloth drill bit to pass therethrough.

10. A clothdrilling apparatus as defined in claim 9V, further comprising a removable drill pad mounted in said i with the drillpad having a surface substantially in the same plane as said work surface of the base.

1l. A cloth drilling apparatus comprising: a base adapted ,to receive a bed of cloth; support means extending upwardly from said base; platform means cantilever mounted on said support means and extending over .said base; a cloth drill having a base plate with a plane underside mounted on said platform means; Vsaid base having a flat work Vsurface for supporting said cloth bed at least along -the loci of the drilling axis offsaid cloth drill onfsaid platform means; said platform means being oriented with respect to said fiat work surface so that the drilling axis of said cloth drill is yperpendicular to said flat work .surface even when said drilling axis is canted with respect :to the underside of the drill base.

l2. A drill jig comprising: a base plate; supportmeans extending upwardly from said base plate;platform means for supporting the underside of a drill base, cantilever mounted at one end on said vsupport means and extending over -said base plate; additional support means for said drill platform means connected between said support means and said platform means adjacent its lfree end;

l'said base plate Ahaving a--at Work surface atleast along the loci of the drillinhaxlnnf a drill mounted on said References Cited in the file of this patent platform means with e '1 axis substantially perpendicular to said flat work surface; means for adjusting the UNITED STATES PATENTS orientation of said drill platform means with respect to 134,392 Morlan Dec. 31, 1872 said at Work surface to thereby align the drilling axis of 5 1,308,898 FOX July 8, 1919 a cloth drill on said platform means to a line perpendicu- 2,264,474 Lang Dec. 2, 1941 lar to said flat Work surface even when said drilling axis 2,587,520 Peplow Feb. 26, 1952 is canted with respect to the underside of the drill base. 2,623,419 Wales Dec. 30, 1952 UNITED STATES PATENTSOFFICD CERTIFICATE OF CURRECTION Patent No 3,000,238 September 19I 1961 'lauik Gabriel Maluf It is herebyv certified that error appears in the above numbered patent requiring correction and that the said Letters Patent should vread as corrected below.

Column 4, line 28, for "jib" read jig line 38, for "the" read all column 8 line llY after- "on" insert the Signed and sealed this l'th day of April l962 (SEAL) Attest:

ESTON e, JOHNSON A DAVID L. LADD Attesting Officer i Commissioner of Patents

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