US566923A - Rotary support for drills - Google Patents

Description

(No Model.) Y

W. J. MEWER.

ROTARY SUPPORT FOR DRILLS.

No. 666,923. Patented Sept. 1, 1896.

UNITED STATES PATENT EEicE.

VILLIAM J. MEWER, OF OLD ORCHARD, MAINE, ASSIGNOR, BY DIRECT AND MESNE ASSIGNMENTS, TO THE MEWER TOOL COMPANY, OF PORTLAND, MAINE.

ROTARY SUPPORT FOR DRILLS.

SPECIFICATION forming part of Letters Patent No. 566,923, dated September 1, 1896.

Application filed February 5, 1895. Serial No. 537,385. (No model.)

To all whom t may concern: pear when taken in connection with the ac- Be it known that l, WILLIAM J. MEWER, a companying drawings, in whichcitizen of the United States, residing at Old Figure l is a View in perspective of the Orchard, in the county of York and State of preferred embodiment of mypresent inven- 55 Maine, have invented certain new and usetion, the same indicating the device or supful Improvements in Rotary Supports for port all ready for use, and showing the gen- Drills, of which the following is a specificaeral construction and arrangement of parts. tion. Fig. 2 is a longitudinal sectional View taken This invention relates to certain new and centrally through the rotary support, and 6o 1o useful improvements in rotary supports for showing the construction and relative ardrills g and it consists, substantially, in such rangement of each part by which the conjoint features thereof as will hereinafter be more operation of the whole is effected. Fig. 3 is particularly described. an elevation of the stock or drill-holder in The particular character or kind of drilldetail. Fig. 4 is a top or plan view of the 65 support to which the present invention more support, with the friction cone disk or plate especially relates is such, for instance, as is and the cushion or spring detached or reshown and described in my former applicamoved. Fig. 5 is a bottom plan view of the tion for Letters Patent, filed December 11, friction cone disk or plate. 1893, and having Serial No. 493,412, and Before proceeding with a more detailed de- 7o zo wherein I resort to a stationary part adapted scription I desire to say that my present infor attachment to the object to be drilled, a vention is capable of several different emrota-ry part Working in said stationary part, bodiments, and therefore I do not limit myy and an adjustable follower or feed take-up. self to the precise details or specific devices In said former invention as the drill is rohereinafter referred to. For instance, the 75 tated the rotary part of the support turns main purpose is to secure both an automatic with it, and as said drill is gradually fed or self-acting feed or take-up, as well as an forward the feed is taken up from time'to elastic or cushioningresistanceto the take-up time by adjusting the follower by hand, in and drill, whenever any back thrust occurs; which way a constant resistance or working but in some instances where soft bodies, as 8o 3o bearing for the drill is obtained. The said wood, are to be drilled there would be no ab# former invention is found especially advansolute necessityfor the cushion or spring, and tageous with certain classes of work, but in in such cases the same could be dispensed some instances the drill will slip unless the with. At the same time, however, the autofeed take-up is constantly adjusted, and this matic feed or take-up must be invariable in 85 naturally requires very careful watching and its action, and this result I secure as will extreme care on the part of the operator or more fully hereinafter appear. In the presworkman. ent inventionthe drill-holder passes through The object of the present invention is to the automatic follower or take-up, and when render the operation of the feed take-up selfthe parts are properly adjusted the said fol- 9o 4c acting or automatic, so astoobviate repeated lower or take-up turns or rotates with the adjustments, while at the same time maindrill and its holder, while the boring or feed taining a constant and invariable resistance. of the drill is steadily and automatically com- A further object of the present invention pensated for and a constant working bearing is to provide ayielding or elastic resistance to or resistance for the drill maintained. 95 the drill, so as to prevent slipping or breaking Referring to the accompanying drawings,

of the same during the operation of boring Arepresents Inyimproved device or drill-suphard substances, as iron or otherrmetal. port as a whole, which when of full size is The invention also has certain other obeasy to handle and very readily manipulated.y jects in view, such as lightness, ease of oper- The said device or drill-support, as shown in roo 5o ation, and'more ready manipulation, ysub- Figs. l to5, inclusive, is constituted of a censtantially as will more fully hereinafter aptral drill stock or holder 1,Wl1ich for a greater part of its length is of plain surface and straight, as shown at 2, while at its lower end it is formed or provided with an enlarged head 3, having a squared or other suitableshaped recess or opening 4 for receiving the end of the drill or bit 5, or to hold any drill by a set-screw, (not shown,) or which may be adapted to receive any suitable form of drillchuck adapted to hold all sizes of drills ordinarily employed. The said drill stock or holder 1 is formed at its upper end with a tapering and squared portion 6 for fitting within the brace of an ordinary handdrill or bit-brace, so as to be rotated or driven in the usual way of operating such drills, while immediately below this squared portion the said stock or holder is formed for a suitable distance with a right-hand screwfthreaded section 7, designed to receive an adjusting-nut in the manner and for the purpose hereinafter explained. The said bit or drill stock or'holderl passes loosely through a hollow sleeve 8, and is prevented from slipping out ofthe same by means of a small collar 9, fastened around thevstock at a point below the screw-threaded section 7, the lower edgeof Vsaid collar resting upon the upper edge of the hollowsleeve, andV thus between the head 3 and the collar 9 the drill-stock is prevented from withdrawal in either direction. The position of the said collar, however, is such as to allow a limited movement of the stock within the sleeve, so that any back thrust given the feed device and drill on striking an obstruction or very hard substance willv be permitted to a limited extent.

The sleeve 8 is formed orprovided at its upper end with a h'a-nd piece or wheel 10, which permits ofthe sleeve being'turned by hand to take upthe feed Whenever a selfactingor automatic action is not desired or needed, the said wheel beingof sufiicient size and scalloped around its edge at 10a to facilitate the graspingthereof. Preferably a selfactingorautoinatic action of the followeror feed `take-up S is desired, and to secure which lem ploy any suitable friction-clutch between the drillstock or holder andthe said takeeup.v

While I am not limited to any particular form of friction-clutch, I liavehereinshown a cup or ring 11, providedwitha continuous upright iiangef12, slightly'iiaring, and which ringeor cup is seated within a hollow recess 13 inthe upper surface of the hand-wheel l0, and is formed with a central opening 14,

largeenough to pass down`4 over the collar 9,

leavinga clear space between the two. The cup or ringissecured in place within the upper surface of thewheel'by small screws 15', passing through'the two from the under side of the wheel, anditworks in connection with the friction-disk to be described. Thiscup or ringneednot beseparate from the wheel, but the two couldbe `integraler inone piece, in which case thereV would of course be no necessityforthe screws orfany'other fastening.`

-The stocker holder l isformed ata point between the collar 9 and the screw-threaded section 7 with a small projecting key 1b', which enters a slot 17, formed in the wall of a friction cone-disk 18, which is also formed or provided with a sleeve portion 19, of larger bore or internal diameter than the central opening 2O of the disk, and within said sleeve portion 19, at the lower end thereof, is an annular flange 21, which forms a base or seat for the lowerend of a spring 22 or other elastic cushion, which surrounds the screw-threaded section 7 within the sleeve portion.

The cone-disk 1S is beveled or slightly conical on its edge at 23, so as to it tightly within the flaring flange of the cup or ring 11, and when held down therein the friction produced is sufficient to cause the sleeve or :feed take-up to rotate with thedrill-stock anddrill.

Screwing upon the threaded section 7 of the drill holder or stock is an adj Listing-nut 24, through the medium of which the cushion or spring 22 is compressed to any desired degree or tension between its seat and the nut, and thus is an elastic resistance always furnished to the feed device or take-up during the operation of boring ordrilling. By means of said nut the resistanceA afforded by the spring or cushion can be easily regulated, and it will be observed that the nut is formed with a milled flange for enabling the same to bereadily grasped by the handand turned.

The automatic feed or sleeve 8 works throughthe fmainbody 25 offasaddle 26, which is designed to rest upon or against the object tobe drilled, theA saidmain body 25 being formed with a central screw-threaded bore or opening 27 for the-passage of said'sleeve, and

the construction of the parts `is such that the said saddle is prevented' from coming off by means ofthe enlargedhead ofthe drillstock or holder. Formed'with or secured to the body 25of thesaddle, to opposite sides thereof, are the legs or feet 2S, in one of which is fastened permanently the end ofa chain29 or other securing means, while the other foot or 'legis cut or notched at 30to, receive the chain and hold it after the latter has been drawn sufficiently tight around the structure or object to be drilled. From the foregoing it will be seen that the support or device can be readily secured or attached to theobject to be drilled,'thefeet or legs 28 resting upon the object inA an obvious manner and the chain passing around the same. By tightening the nut 24 and-thenturning the brace in the usual manner the drill and feed devices will be rotated togetherywhile the saddle re mains stationary, and in this way the object or structure is drilled without having to stop fromtime to timeto adjust the follower or take-up common to' my former invention as Well as to some others. The feed take-up is gradual, yet invariable, and itA will be seen with what effectiveness myinventionmay be employed'- 1. A rotary drill stock or holder having IOS 566,923 v A s enlarged lower end and provided a suitable distance from it upper endwith aprojection or collar, a rotary feed take-up loosly fitting the holder between said projection and enlarged end, and a friction device and a spring, between the holder and take-up,substantially as described.

2. A rotary drill stock or holder, a rotary feed take-up screw-threaded externally and fitting loosely upon said holder, a saddle screW-threadedto receive the take-up, afriction device between the holder and take-up, and a spring and adj usting-nut, for regulating the friction device,substantially as described.

3. A rotary drill support or holderhaving a head for receiving the drill and formed at its upper part with a threaded section and a key, a rotary feed take-up surrounding said stock or holder, a clutch constituted of the movable friction-disk and sleeve engaging the key, and the cup joined to the take-up, and the spring and adjusting-nut for regulating the clutch, substantially as described.

4. A rotary drill holder or stock formed with the screw-threaded section and key and provided with a collar and an enlarged head,

friction cone-disk fitting said wheel and formed with the slot and inner flange or base, and the spring and adjusting-nut regulating the friction between the disk and wheel, sub stantially as described.

In testimony whereof I have signed my naine to this specication in the presence of two subscribing Witnesses.

WILLIAM J. MEWER.

Witnesses:

GEO. F. GoULn, ELINOR S. MOODY.

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