US2333025A - Angle drill - Google Patents

Description

G. J. MAYER Oct. 26, 1943.

ANGLE DRILL Filed June 5o. 1941 .Patented Oct. .26, 1943 UNITED STATES PATENT OFFICE ANGLE DRILL l Gottfried J. Mayer, Bueno, N. Y.

Application June 30, 1941, Serial No. 400,438

8 claims. `(c1. 'v7- 7) My invention relates to an angle drill, and more particularly to a drill of this type which is vto be attached tothe chuck of an ordinary or master drill, although the source of power used to operate the drill may be directly applied to the driving shaft or `prime mover of this angle drill.

`Many places are encountered in or on objects Where holes are to be drilled which ordinary or master drills cannot be used for; for example, when drilling holes inl recessed places orv places adjacent upstanding flanges or ledges.

It is therefore one of the objects of my invention to provide an angle drill in which the driving shaft or prime mover can be entered and secured in the chuck of an ordinary or master drill, and which is of comparatively small size so that it may be operated in close quarters or adjacent what ordinarily would be considered obstructions to an ordinary or master drill, or what may be termed a .conventional drill.` r

A further object of my invention is to provide an angle drill which may be employed as an accessory to a master drill, orwhich may itself be used as a master drill; its design and construction, however, being such that it is particularly adapted as an adjunct to a conventional or master drill for` use in places inaccessible to the latter;

A still. further object of my invention is to provide an angle drill which, as an accessory to a master drill, assures uniform Irotation for the drill-bit during operation, and furthermore, which by reason of its construction, practically eliminates lateral or radial stresses of the moving parts of the drill within their bearings, thus assuring longer life and greater efllciency.

With the aboveand other objects in view to appear hereinafter, my invention consists in the novel features of construction and in the arrangement and combination of parts to be hereinafter described and more particularly pointed out in` the appended claims.

`In thedrawing, Fig. l isa `side elevation of my drill, Y Y j Fig; 2 is a. longitudinal sectiont'hrough the same,A a. portion ofthe drill being shown in elevation.

Fig. Bis a top view of the same.

Fig. 4 is a front view ofthe same. Fig. 5 is a detached perspective view of the intermediate shaft or connector link between the driving and drivenshafts of the drill.

Fig. "6 is a perspective view of one of the cou# improved angle pling elements connecting the intermediate shaft or link with the driving and `driven shafts ofthe drill.

Fig. '7 is a detached perspective' view of the shell or casing of the coupling.

Fig; 8 is an enlarged section taken on `line 8 8, Fig. 1.`

Angle'drills have previously been used as accessories to master drills, but by reason of the fact that such drills require a connection between tvvo shafts arranged at an angle to each other and such connections as now used cause intermittent speed in the rotation of the driven shaft, the operating parts of the drill become quickly Worn, due to lateral or radial stresses set up in the bearings of the drill. Such stresses' are materially augmented under continued use of the drill and replacements of Wornparts are required at short intervals. Applicantsv invention has been designed to overcome such objectionable features.

To overcome such objections, I have` designed my improved angle drill, which comprises a frame or support 9 so formed that it serves as a handle, and with this in mind, an opening `Ill is formed through this frame or support to enable one or more fingers of the guiding hand to be passed therethrough while grasping the handle. The opening I0 serves as a finger-hold so that the support or handle lcan be grasp with one hand and the device or drill thus directed to the Work tobe performed; oftentimes in locations not conveniently accessible by other means. The device may therefore be termed a one-hand device, because of its form and compactness, and thereopening I0 may be provided for serving as a means to rmly grasp the device in one-hand so that it will not become displaced from the work during operation. The frame or support, or morev `definitely the handle, is reduced in Width from one end to the other, or inother Words from its outer end to what may be termed its inner end, with the marginal portions along `one edge at obtuse angles. Along the upper, marginal portion of this handle a shaft bore Il is formed which is comparatively long to provide a good bearing for the driving shaft l2 of the ldevice. This shaft has one end reduced 'and screw threaded, as at I3, and its other end is adapted for entrance into the chuck of va master drill, so that upon operating the latter the driving shaft l2 will be rotated. If desired, the source of power employed for operating the master drill may be applied directly to this drivingshaft.

The handle or support 9 is provided with an oil hole I4 extending from its upper edge into the shaft bore II, so that the shaft can be properly oiled.

The driving shaft I2 also has a stop collar I5 pressed or otherwise secured thereon so as to bear against one end of the handle, as at I6.

This collar is so positioned that only the screwthreaded reduced end I3 of the shaft projects from the opposite end of the handle or support, as clearly shownin Fig. 2.

I 'I designates Aa shaft coupling considered as a whole, and this comprises an inner merlber I8, which may be termed the coupling element or coupling proper, and an outer member I9 which is in the form of a sleeve utilized as an enclosure y' shell, into which the coupling proper is pressed. The t between the two members of the complete coupling is such that movement relatively of these members cannot take place.

The` inner member I8 or coupling proper is when the outery member orenclosure shell I9 is pressed'rmlyover the'inner member or coupling proper I8, thev slots 22 in the latter are covered is provided with diametrically opposite studs 3| which are entered in the slots 22 of said coupling element. Such connection of the intermediate shaft or link with the couplings may be termed universal joints. The intermediate portion of the intermediate shaft or link is enlarged as at 32 for the purpose of increasing the strength of the same while providing spherical terminals at opposite ends capable of entering the coupling I'I without unduly enlarging the latter; and since this intermediate shaft or link is subjected to considerable strain, the advantage of this enlargement will be apparent, especially since it provides the necessary rigidity for this member. 'heintermediate shaft or link with the coupling elements at opposite ends thereof occupy the inand are not visible except from the open end of f the complete coupling.

VrIhe support `or handle 9 is so constructed that a ysecond bore l23 is formed therein, preferably at Aan obtuse angle to the bore I I, and this bore 23 is alsoutilized yas a shaft bearing for what maybe termed the 4driven shaft, designated by the numeral 24. Thissupport is also provided with an oil opening. 25` leading to the bore 23, so that -thedriven shaft 24 may be properly oiled. The lower or outer end of Vthe driven shaft 24 is enlarged, vas at 26, and provided with a downwardly lor outwardly opening axial bore 21 which is-fscrew-threaded or otherwise provided with means to retain-a drill-bit entered therein. This ,enlargement therefore serves the purpose of a chuck, and may be termed an adapter chuck.

'Ihe inner endjof this driven shaft is reduced and screw-threaded, as at 28, .and only this screw-threaded reduced end projects from the bearing portion of thewsupport or handle in which the shaft is journaled. This end 28 of the shaft is threaded into alsecond coupling similar to the coupling connected 4tothe driving shaft I2, VFor this reason `the parts of this second coupling memberare designated by the same numerals as those constituting the coupling member attached to thedriving shaft.

From the foregoing it will be apparent that the bearings for the .shafts I2r and 24 are arranged along marginal portions of the handle Vwhich are disposed at an obtuse angle to each other and are separated by an intervening space. g f

29 designatesk an intermediate shaft, which may Vmore aptly be termed a connector link connecting the driving shaft I2 with the driven shaft i 24. This intermediate shaft or link is provided at opposite ends with Aspherical terminals 3U, each being entered in the coupling element I8 of a coupling I'I, and each of these spherical terminals -tervening 'space between the shaft bearings.

By reason of the studs 3l beingentered in the slotsw22 of the couplings H, the intermediate shaftor link 29 is caused to rotate upon rotation of thedriving shaft I2, and in turn lcauses rotation of the ldr-iven shaft '24, .with `assurance ythat the uniformity of rotation applied by the sourcerofpower to the .drivingshaft will be transferred yto .the driven shaft, in contra-distinction to Apresent-day methods of connectionV provided betweenthe driving and driven shafts of angle drills, in which, during each complete revolution Vof the driving shaft, aspeeded up partial and a retarded y'partial movement Vis' imparted to the driven shaft. Therefore, during eachrotation or cyclic movement of the driven shaft, intermittent speedis provided, which slows up the work,.and applies Vsevere lateral or radialV stresses on the driven shaft. This results in .the wearing of parts, necessitating re-.boring of the support or handle 9 and substitution of .replacement shafts or larger diameters, or the addition of bushings in order to receive a driven shaft of regulation diameter, especially since tools of this kind are subjected to severe usage in many places. The parts of applicants Vdevice subject to wear, such as the .couplings and-the intermediate shaft or link, can be easily replacedata trifling expense, and even such parts will immeasurably outlast angle drills now in use. l

Havingy thus described my invention, what I claim is:v

1. An angle drill, comprising an elongated support or handle having a shaft `bearing along one oflits .longitudinal marginal portions and a second at its end disposedV at an angle to the Erst-.mentioned bearing, opposing ends of said bearings being separatedby openspace, a shaft in the first-mentioned of said bearings, a coupling vapplied to said last-mentioned shaft at the adjacent Iend of its bearing, a shaft in the other bearing, a coupling applied to the end of said shaft Vin opposed relation to said first-mentioned coupling, and an .intermediate shaft having a universal joint connection with both of said couplings.

2. An angle drill, comprising a supporter handle having shaft bearings disposed atan obtuse angle to each other, a drivingshaft journaled in one of said bearings and having a stop collar in contact with the outer end-ofsaid bearing and a connector-end extendingfrom the inner end of said bearing and abutting against the latter, a driven shaft journaled in the other of said bearing and having an adapter chuck at its outer end in contact with the outer end of. said lastmentioned bearing and aV connector end extending from the inner end of said bearing and abutting against .the latter, a link interposed between the connector ends of said shafts, and universal connections between the ends of said link and the connector ends of said driving and driven shafts.

3. An angle drill, comprising a support or handle having shaft bearings disposed at an obtuse angle to each other, a driving shaft journaled in one of said bearings and having a stop collar in contact with the outer end of said bearing and a reduced screw-threaded terminal projecting from the inner end of said bearing, a driven shaft in the other of said bearings having an enlarged portion serving as an adapter chuck in contact with the outer end of said last-mentioned bearing and a reduced screw-threaded terminal projecting from the inner end of said bearing, couplings threaded onto the reduced screw-threaded inner terminals of said shafts, each coupling opening to their inner ends and having stud-receiving slots formed therein, and an intermediate shaft provided with diametrically opposite projecting studs at each endentered into the stud-receiving slots of the respective couplings.

4. An angle drill, comprising a support or handle having shaft bearings disposed at an obtuse angle to each other, a driving shaft journaled in one of said bearings and having a stop collar in contact with the outer end of said bearing and a reduced screw-threaded terminal projecting from the inner end of said bearing, a driven shaft in the otherof said bearings and having an enlarged portion serving as an adapter chuck in contact with the outer end of said last-mentioned bearing and a reduced screw-threaded terminal projecting from the inner end of said bearing, couplings threaded onto the reduced screwthreaded inner terminals of said shafts, each coupling opening to its inner end andhaving stud-slots formed therein, and an intermediate shaft provided with spherical terminals and studs projecting from diametrically opposite points of said spherical terminals and entered into the stud-slots of said couplings.

5. An angle drill, comprising a support or han- .dle having shaft bearings disposed at an angle to each other, a driving shaft journaled in one of said bearings and having a stop collar bearing against the outer end of said bearing and a reduced screw-threaded terminal extending from the inner end of said bearing, a driven shaft journaled in the other of said bearings and having an adapter chuck in contact with the outer end of said last-mentioned bearing and a reduced screw-threaded terminal extending from the inner end of said bearing, a coupling applied to each of said reduced screw-threaded terminals, each coupling comprising an inner member having an axial screw-threaded opening to receive the reduced screw-threaded terminal of its respective shaft and slots in its peripheral wall extending inwardly from its outer end, each inner member of said couplings having an'outer member applied thereover to cover said slots, and a link between said couplings having spherical ends entered in said couplings and studs projecting from diametrically opposite points of said spherical ends and entered into the slots of the inner members of said couplings.

6. An angle drill, comprising an integral handgrasped support or handle having a finger-hold enabling the handle to be grasped in one hand and shaft-bearings disposed at an angle to each other and separated from each other at adjacent ends by an intervening space, a driving shaft journaled in one of said bearings and held against longitudinal movement therein toward said space, a driven shaft in the second bearing having a chuck at its outer end to hold said driven shaft against longitudinal mov-ement toward said space, couplings applied to the opposing ends of said shafts in said space and abutting against said bearings to prevent longitudinal movement of said shafts in directions away from said space, and a link connecting said couplings by means of universal joints within said couplings.

7. An angle drill, comprising an integral support or handle having shaft bearings at an angle to each other, one of said bearings being arranged along one of the marginal portions of said support or handle and the other along a portion of the handle at an angle to said marginal portion, a driving shaft journaled in one of said bearings and having a stop collar in Contact with the outer end of said bearings and a connector end extending from the inner 'end of said bearing and abutting4 thereagainst, a driven shaft journaled in the other of said bearings and having an adapter chuck at its outer end in contact with the outer end of said last-mentioned bearing and a connector end extending from the inner end of said bearing and abutting thereagainst, and a link interposed between the connector ends of said shafts and having terminals co-acting with said connector ends to form universal joints between said links and said connector ends.

8. An angle drill, comprising a support or handle reduced in width from one end thereof to the other and having marginal portions along one edge thereof spaced apart and disposed at an obtuse angle to each other, shafts journaled in said spaced-apart marginal portions, a universal-connection connecting adjacent ends of said shafts and serving to prevent movement longitudinally of said shafts away from each other, means on one of said shafts for preventing longitudinal movement thereof in an opposite direction, and a chuck at the outer end of the other shaft to prevent movement of the latter longitudinally toward said universal couplings.

GOTI'FRIED J. MAYER.

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