US3019675A - Dowel hole drilling jig - Google Patents

Description

Feb. 6, w62 .1. L. CLEVELAND DOWEL HOLE DRILLING JIG 2 Sheets-Sheet 2 Filed June 28, 1960 4 A M L@ M L L c 2 %2 in m a De Z2 L 0 2 2 2 5 3 a. j E a M ,L wz.. 2 WL 5 A I 2v @f Mr J M s m VTM INVENTOR ATTORNEYS 3,019,675 DQWEL HLE DRILLING JIG James L. Cleveland, 351 Clyde Ave., Calumet City, Ill. Filed lune 2S, 196i), Ser. No. 39,330 S Claims. (Cl. 'T7-62) This invention relates to a jig for drilling dowel holes in pieces of lumber. It is primarily intended for drilling dowel holes in the edges of window sash and doors but it is also applicable to other pieces of lumber of comparable thickness and to cabinet work generally.

The object of the invention is to provide a jig for drilling two parallel dowel holes at a predetermined distance art.

Another object of the present invention is to provide a jig for drilling dowel holes which is adjustable in two planes to space the holes along the edge of a piece of lumber from both the end and with respect to the thickness of the piece of lumber.

A further object of the present invention is to provide a jig for drilling dowel holes which has a wide range of adjustment with respect to the end of the piece of lumber in which the holes are being drilled, so that it may be used for drilling holes in the edge of a door or window sash adjacent the end of the latter for dowels, and also in the edge of the door or window sash at a considerable distance from the end of the latter for hinges or latches.

Still other objects, advantages and improvements will become apparent from the following specification, taken in connection with the accompanying drawings, in which:

FIGURE l is a top plan view oi the drilling jig according to the present invention.

FIG. 2 is an end elevational view of the drilling jig.

FIG. 3 is a longitudinal vertical sectional view, taken on the section line 3-3 of FlG. 1 and looking in the direction of the arrows.

FIG. 4 is a transverse vertical sectional view, taken on the section line 4--4 of FIG. 3 and looking in the direction of the arrows.

FlG. 5 is a detail end elevational view showing the stop plate, which is used when drilling holes in the edge of a window sash or door close to the end of the latter.

FiG. 6 is a similar view of the elongated stop bar, which is used for drilling holes in the edge of a window or door at a considerable distance from the end of the latter.

FlG. 7 is a detail sectional view, taken on the section line 7-7 of FIG. 6 and looking in the direction of the arrows, showing the attachment of the elongated drilling bar to the frame of the drilling jig.

FlG. 8 is a detail sectional View, taken on the section line 3--8 of FIG. 3 and looking in the direction of the arrows, showing the mounting of one of the vertically adjustable blocks on one of the longitudinally adjustable slides.

FIG. 9 is a detail isometric view of one ofthe vertically adjustable blocks.

FIG. l0 is a detail isometric view of one of the longitudinally adjustable slides.

FIG. ll is a detail isometric view of the thrust block.

Referring now to the drawings in detail and to FIGS. i, 2. and 4 in particular, the piece of lumber, such as the edge of a window sash or door in which holes are to be drilled, is shown at A. The drilling jig according to the present invention, includes a frame comprised in part by a rectangular vertically positioned plate ill. This plate 10 has two rectangular apertures 10a and 10c therein, which are positioned with their longer sides parallel to and symmetrically disposed with respect to the longitudinal center line of the plate and are separated by a web 10b along the transverse center line. At its top the plate 10 has an integral upper right angle flange 11, which is preferably curved in the arc of a circle in top plan view. The drilling jig is in part secured to the piece of lumber A by a power screw 14, which is mounted in a suitable screw threaded hole in the upper horizontal ilange 11. At its upper end the screw 14 has a rod 15 positioned in a diametrically located hole therein and this rod has enlarged ends 15a- 15a to hold same in place. It will be obvious that by turning the rod 15 the screw 14 may be rotated in the proper direction. The lower end ofthe screw 14 is of inverted frusto-conical shape at 14a and this lower end is slidably received in a dove-tailed slot 16a in a thrust block 16. The thrust block lo is adapted to rest on one surface oi the piece of lumber A.

At its bottom the plate 1% is formed with a second horizontal ange 12, which is positioned on the same side of the plate and is parallel relationship to the upper horizontal iiange 11. This lower ange 12 also has two rectangular apertures 12a and 12C therein, the side walls of which each have a 1 longitudinal taper. The ange is positioned with the rectangular apertures 12a and 12e having their tapered sides parallel to and symmetrically disposed with respect to the longitudinal center line of the door A, when the jig is being used for drilling dowel holes This stop plate has an l close to the end of the latter. elongated slot 17a along its longitudinal center line and a right angle ange 17 b at its outer end to facilitate gripping. A screw 18 is positioned in the elongated slot 17a in the stop plate and is received in a suitable screw threaded hole in the vertically positioned plate 1l). The inner end of the stop plate abuts the end of the door or window sash A to position the drilling jig at some location determined by alignment ot a selected mark on the scale 12d with the end ofthe door or window sash A.

For drilling holes in the edge of a door or window sash A a greater distance from the end of the latter, that is when hinges or latches are to be mounted in the edge of the door or window sash, an elongated scale bar 19, as shown in FIG. 6, is provided. This scale bar has an elongated slot 19a, positioned symmetrically with respect to the longitudinal center line, and a scale 19h scribed on one tace between the slot 19a` and one side. As shown in FIG. 7, this scale is adapted to be received in a slot 10d in the plate 1li, which slot is positioned symmetrically thescrew 18, and the inner end is formed with right angle fingers 19d, which engage one edge of the vertically positioned plate 1li. A bolt 20 is movable along the elongated slot 19a and this bolt has a square bottom 20a and a cylindrical knurled nut Zlib. By setting the bolt 20 with its transverse diameter in alignment with a selected mark on the scale 1917, and one side of the bottom 20a of the bolt abutting the end of the door or window sash A, the vertically positioned plate 1l) may be set at a desired location along the edge of the door or window sash within the limits of the slot 19a in the scale.

The vertically positioned plate 10 is also formed at its bottom with a third flange 13, which is horizontally aligned with the second ilange 12, but on the opposite side of the plate from the latter. This latter ilange has two rectangular apertures 13a and 13C therein, the side walls of which each has a 1 longitudinal taper. The ange is positioned with the rectangular apertures 13a 4 and 13C having their tapered sides parallel to and sym- 25-25 by thrust exerted diametrically of the eyes and metrically dlsposed with respect to the longitudinal center across the chords of the open sections of the latter ine and are separated by a web 13b, which is positioned In use, let it be assumed that parallel holes are to be along the transverse center line of the Harige. A suitablev drilled in the edge of a door or window sash A adjacent scale 13d is scribed on the top surface of the flange be- 5 the end of the latter for driving in dowels to hold lontween the apertures 13a and 13e and the outer side of gitudinally and transversely positioned members of the the flange. door or window frames together. The screw 18 is Vertically positioned slides 21-21 are movable along loosened so as to leave the stop plate 17 freely slidable. the apertures 13a and 13e in the llange 13. As shown in The plate 10 is positioned against the edge of the door FIG. 8, these slides are comprised by a base and parallel 10 or window sash A. The transverse center line between legs 21a`2la, with one of the legs having a scale 2lb the two holes is determined by setting a preselected mark scribed tnereon The corners of the base are cut away on the scale 12d on the ange 12 in alignment with the and the base is cut away on its transverse center line t0 end of the door or window sash A. e stop plate 17 fOrIIl parallel lugs 21e- 210, which latter are undercut is then shoved inwardly against the edge of the door or on their side walls at 21d-21d- Also, the inner side walls l5 window sash and the screw 18 tightened. This fixes the 0f the lugs llc-2l@ arev tapered at aPPrOXlnlatelY l spacing of the two holes to be drilled with respect to the The slides 21-21 are mounted in Vertical position on the end of the door or window sash A. If a number 0f flange 13, with the lugs 21c-`21c being received in the doors or window sash are to have pairs of holes drilled respective apertures 13a and 13C. Short llat headed bolts in their edges at the same distance from their endSrtlle x 22 have their heads received in the slots 21d- 21d in the 2O setting of the stop plate 17 will remain unchanged bases of the slides 21-21. Clamping plates 23 have their throughout the drilling operation. The power screw 14 opposite corners cut away, for receiving the corners of is now turned to grip the door or window sash A bel the apertures 13a and 13C ln the llange lfl, and have Centween the thrust block 16 and the lower ange 12. 1' tral holes therein for freely receiving the bolts 22. Wing Where holes are to be drilled in the edge of the door nuts 24 are reCelVed 0n the Outer ends 0f the belts 22 25 or window sash A at some distance from the end of the and serVe t0 hold the slldes 2l`2l against the upper faee latter, as where hinges or latches are to be placed on and the Clarnplng Plates 2a-23 against the lOWer face 0f the edge of the door or window sash, the slides 21-21 the flange 133 cairying the guide tubes 29-29 are removed from the The combination of the 1 longitudinal taper on the elongated rectangular apertures 13a and 13C in the 0f the rectangular apertures 130 and 13C ln the llange l then positioned under the window sash or door A, rewith the 1 taper on the inner side walls of the lugs placing the llange 12, The power screw 14 and the 21C`2l0 0n the slides 2l-2l, PrOVlCleS fOr more easy thrust block 16 are not used i'n this drilling operation. rnOVement 0f the Slides, after the Wing nuts 24-24 llave 35 The elongated scale bar 18 is inserted in the slot 104, been loosened; also, that when the Slides 21-2i1 have with the lingers 19d- 19d on the scale bar against the been re-set and the Wing nuts 2l-24 tightened, the slides inner edge of the frame 10. The spacing of the holes Will Ime up better and be positioned at 90 to the Hanse to be drilled from the end of the doorV or window sash 13" S is determined by the scale 19b on the elongated bar AS SllOWIln FIGS- 2, 3 and 9,Vertleally slidable blocks 40 and the bolt 2@ set in position in the elongated slot Parallel lugs 25a-25fh Wllell lugs are undercut along 45 the upper face of the door or window sash A and the slots intersect the notches 25o. The slide blocks 25-25 loosening the wing nuts 24-24 and moving either 0r are posltwned 0n the Inner faces ef the lugs 21a-21a 50 both of the vertically positioned slides 21-21 towards 0f the slldes 21`21, resPeCtlVelY; With the lugs 250-25L or away from the transverse center line, and then tighten- 25b`25b 0f tlle elarnplug 'blocks 25`25 C arnplllg Similarly, the spacings of the holes to be drilled with plates 27-27, similar to the previously described clamp- *55 respect to the longitudinal center line of the edge of the lng Plates 23, are Placed OVer the Outer faces 0f the legs door or window sash A are determined by loosening the 21a-21a of the slides'21`21, with the cut away corners wing nuts 28 and moving the slidable blocks 25-25 upon the clamping plates receiving the corners of the legs, ward or downward along the vertically positioned slides and the bolts 26-26 pass freely through central holes in 21 21 and then tightening the wing nuts. The settings the Clamping Plates- Wing nuts 28`28 are received 0n 60 of these slidable blocks are determined by the marks on the outer ends of the bolts 26-26 and serve to hold the the scale 2lb on the slides. slide blocks 25-25 against the inner faces and the clamp- Having now fully described my invention, what I ing plates 27-27 against the outer faces of the parallel claim as new and useful and desire to secure by Letters legs 21a-21a of the vertically positioned slides 21-21. Patent of the United States is:

A Pair 0f guide tubes 29-29 ls Provided and these 65 1. A drilling jig including a plate having parallel uptubes serve to direct the drills against the edge ofthe door per and lower flanges on one side and a lower flange on or window sash These tubes are held in place by eye the other side, a power screw mounted in a hole 1n the bolts 31)*30 which are opened by having their free ends upper flange for engaging a piece of lumber to be drilled spread apart from their Shanks over the arc of approxiagainst the first lower flange a slide member mounted for mately 120. The Shanks of the eye bolts 30 are posi- 70 movement along said second lower flange, a block mounttioned in the slots 25d in the slidable blocks 25 and reed for movement along said slide member, and a drillceived wing nuts 3131 on their outer threadedl ends, ing guide carried by said block.

which nuts abut the top faces of the blocks. The eye bolts 2. A drilling jig including a plate having parallel up- 30`30 hold the guide tubes in place against one side of per and lower flanges on one side and a lower flange on the V shaped notches 25d-25d in the slideable blocks 75 the other side with an elongated aperture therein, a

power screw mounted in a hole in the upper llange for engaging a piece of lumber to be drilled against the first lower flange, a slide member mounted for movement along said second lower flange and having lugs thereon received within the elongated aperture in the latter, a blocl; mounted for movement along said slide member, and a drilling guide carried by said block.

3. A drilling jig including a plate having parallel upper and lower flanges on one side and a lower llange on the other side, a power screw mounted in a hole in the upper llange for engaging a piece of lumber to be drilled against the rst lower flange, a pair of slide members mounted for movement along said second lower flange, blocks mounted for movement along said slide members, and drilling guides carried by said blocks.

4. A drilling jig including a plate having per and lower llanges on one side and a lower flange on the other side with a pair of elongated apertures therein, a power screw mounted in a hole in the upper flange for engaging a piece of lumber to be drilled against the lirst lower llange, a pair of slide members mounted for movement along said second lower ilange and having lugs thereon received within the apertures in the latter, blocks mounted for movement along said slide members, and drilling guides carried by said blocks.

parallel up- 5. A drilling jig including a plate having parallel upper and lower lianges on one side and a lower ange on the other side with a pair of elongated apertures therein, a power screw mounted in a hole in the first upper llange for engaging a piece of lumber to be drilled against the rirst lower flange, a pair of parallel legs and a pair of lugs thereon with slots formed complementally in said lugs, said lugs being received within the elongated apertures in the second lower ange, bolts mounted in said slots in the lugs and projecting through the apertures, clamping plates surrounding said bolts, nuts on said bolts engaging said clamping plates, slidable blocks mounted between the legs of said slide members and having slots in one face, bolts mounted in the slots in said slidable blocks and projecting between the legs, clamping plates surrounding said bolts, nuts on said letter bolts engaging said letter clamping plates., eye bolts secured to said slidable blocks, and guide tubes carried by said eye bolts.

References Cited in the tile of this patent UNITED STATES PATENTS

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