US1765362A - Drill-operating holder - Google Patents

Description

June 24, 1930. cs.v w. BERRY 1,755,362

DRILL OPERATING HOLDER Filed Sept. 4', 1928 Patented June 24, i

4ma'I flfo STATES 'PATENT ori-lcs 'anonce wf nanny, or woLrEvsono, ixw HAMPSHIRE DRILL-OPERATING HOLDER Application led September 4, 1928. Serial No. 303,854.

This invention relates fto'a drill holder adapted to be engaged with the drill driving vmember of an electric drill press, such as is -commonly used in automobilerepair shopsv and garages to operate a drill.

' It is 4often desirable to locate the drill at a considerable distance .from the driving' vrmember ogflthe drill press, and at various dis tances therefrom'. The object of'my invention Ais to rovide, as an adjunct or extension of a'dri 1 press,

a di'ilhholder osimple construction, adapted .to hold .a drill in axial alinement with' the driving .member ofthe press, and atany distance .therefrom thatmay be required by the nature of the work being performed.

part of this specificatiom- Figure 1 shows .partly in section and partly in elevation a drill holder embodying. the

inventiomgraspingadrill of maximum ameter.,l

Figure 2 isa view similar to Figure 1, showing a bushing cooperating with the chuck Aes frs .45 of the inner section of t e jaws ofthe holder to grasp adrill of smaller diameter.

Figure 3 shows .perspective the inner section hereinafter described of the drill- `.holder shank. v Fi ure A shows .perspective 4the tubular u mem r-hereinater described which includes the drllfgrasping jaws.

Figure yl5 shows in rspective an element of means ior closing t e jaws lshown by Figure-4, on a drill. Fi' ure 6 is a ings own in section by Figure 2.

Figure 7 is an enlarged sectional View of the bushing member shown by Figure 6'.

40 lFigure 8 is an enlargement of'a portion of of bushings'.

Figure 1, showing. a seriasl line 9-9 b fFlg- Figure 9 is 'a sectionon ure-B.v 1 ti E F' re 0 s ow's in' ve-a por ion 1g gill-holder shank 'sion of the driving member of a drill press,

f 4the accompanying drawings forming aA having an. internal screw thread 24, engaged ortion of theV vslotted tubular member, the s eeve having a perspectiveview of then .an outer section. com

press member,

member separately jof the inner section.

and a modification of the stepped end thereof.

Figure 11 showsin perspective a portion ofa drill formed to engage the stepped end shown by Figure 10. Figure 12 shows a series of drills of different diameters.

The same reference characters indicate the sameparts in all of thefigures.

My improved holder constitutes an extenand is adapted to hold either of a plurality of cylindrical drills 13,of .diil'erent diameters.

Said -holder includes a tubular member having longitudinal slots 21, extending :from its inner end throughoutthe major ortion of its length, to form drill-grasping c uck jaws 20, and provided with compressing means of well known character adapted to close the drill 13 inserted inthe boreof said jaws on a sald means `mcludlng a sleeve 23 member,

with an externally threaded tapered internal surface portion bearing on end .portions of the jaws 20. The outer end portion of the tubular member is rigid and 1nternal1y screw-threaded, and constitutes an elongated coupling sleeve, with which are separably engaged externally threaded portions of a two-part elongatedshank which is adapted at one end to be grasped by the driv and 'at the other ing member of a drill press, j D end to engage a drill '13 grasped by the jaws 20. Said shank includes an innersection combody 16, and an enlarged"v .16, constituting aj aged with the The shan vincludes also -osed of an elongated' e engaged by a drillsed of a reduced externally threaded endcoupling member separably en coupling sleeve 19.

body 17, adaptedA to and -a reduced externally 17, constituting a'` coupling engagedwit the coupling sleeve 19, and separably abuttlng the end 16n hreaded end the outer end portions of.

The inner shank section has a stepped end adapted to have a torque-transmittin en-` gagement with the step ed end of a dri l 13. Said stepped ends may e variously formed. The inner shank section may have a stepped end 15, formed toengage a stepped end 14 on thedrill, as shown by Figures 1, 3 and 8, or a stepped end 15?, formed to engage a stepped end 14* on the drill, as shown by Figures-10 and 11.

The reduced body 16 of the inner shank section is separated by an annular space from the internal surface of the slotted ortion of the tubular member, as shown by igures 1, 2 and 8, so that said reduced bod permits the jaws 2O to be closed on drills o diiferent diameters.

The separability of the outer shank section from the coupling sleeve 19, and from the inner shank section, permits outer shank sections of dilferent lengths to be used interchangeably, so that the length of the holder as a whole, may be varied to locate the drill 13 at any desired distance from the driving member of a drill press..

The inner shank section is preferably provided with a peripheral enlargement 16b between the reduced body 16 and the threaded end 16, said enlargement bearing on the bore of the tubular member, as shown by Figure 1, to prevent looseness of the inner section,

which might be permitted by` the screwthread connection between the end 16 and the coupling sleeve 19, if said enlargement were not provided. The inner section is therefore rigidly supported laterally. To provide additional rigidity I provldevthe outer shank section with a 'bevelled peripheral face 17 b, bearing on a complemental internal face formed on the sleeve 19, as shown -by Figure 1.

It will now be seen that the described holder is sim le, com act, and rigid, and well I adapted or use with the electric drill ress member to cooperate with the jaws in graspv ing drills whose diameters are smaller thanl those of drills `adapted to be grasped directly.

- by the jaws.

I have here shown a series of compressible tubular bushing members 28 -of dilferent vd1- ameters. Each bushing is preferably a resilient sheet metal tube divided longitudinally from end to endrby a slot 29 (Figures 6 and 7) and partly divided by a slot V30. Two or c more of the bushing members maybe nested together to form a laminated tubular bushing whose wall thickness is determined by thenumber-of nested members. The largest bushing member conforms to the internal d 1- ameter of the compressible socket 20, andis adapted as shown by Figure 2 to engage a drill shank whose diameter is less than that of a shank adapted to be engaged directly f by the socket 20, as shown by Figure 1. The other bushing members are adapted to engage drill Shanks of other and smaller diameters. -When all the bushing members are nested, as shown by Figure 8, the laminated bushing formed thereby, is adapted to engage the smallest drill shank.

Each bushing member 28 is rovided at its outer' end with a stop to limit its insertion in the compressible socket 20, the stop being preferably an outwardly projecting flange 31.' The stop of the largest bushing member is formed .to abut the outer member 23 of the chuck, and the stop of each of the other members is adapted to abut the stop of the next larger member as shown by Figure 8.

I claim':

1. A drill holder constituting a drill-press extension and adapted to hold either of a plurality of cylindrical drills of different diameters, said holder comprising a tubular member longitudinally slotted from its inner end throughout the major portion of its length, toLform .chuck jaws, and provided with compressing means adapted to close said jaws on a cylindrical drill, the outer end portion of said member being rigid and internally screw-threaded to constitute an elongated coupling sleeve, and a sectional shank including an inner section composed of a reduced body andA an enlarged externally threaded end constituting a coupling member separably engaged with said coupling sleeve, and anouter section composed of an elongated body, adapted to be engaged by a drillpress member, and a reduced externally threaded end, constituting a coupling member separably engaged with the coupling sleeve, and separa ly abutting the inner section, the inner shanksection having a stepped end adapted to engage the stepped end of4 a drill grasped by said jaws, the reduced body of the inner shank section permitting the -jaws to be closed on cylindrical drills of different diameters, the separability of the outer section permitting outer sections of different lengths to be used interchan eably.

l2. A drill holder as speci ed by claim 1, the inner shank section being provided with a peripheralv enlargement between its reduced body and threaded end, said enlargement bearing ou the internal surface of the tubular member.

3. A drill holder as specified by claim 1, the outer shank section. being provided with a bevelled' peripheral face bearing on a complemental face formed on the coupling sleeve.

In testimony whereof I have aixed my signature.

GEORGE W. BERRY.

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