US577662A - Feed device for rotary drills - Google Patents

Description

(No Model.) I 2 SheetsSheet 1 W. J. 'MEWER. FEED DEVICE FOR ROTARY DRILLS- No. 577,662. Patented Feb. 23, 1897.

@wwhoz (No Model.) 2 Sheets-Sheet 2.

W. J. MEWER. FEED DEVICE FOR ROTARY DBILLS.

No. 577,662. Patented-Feb. 2a, 1897.

I UNTTEn STATES PATENT OFFICE.

WILLIAM J. MENVER, OF OLD ORQJHARD, MAINE ASSIGNOR TO THE MEWER TOOL COMPANY, OF PORTLAND, MAINE.

FEE D DEVICE FOR ROTARY DRILLS.

SPECIFICATION forming part of Letters Patent No. 577,662, dated February 23, 1897.

Application filed May 23,1896. Serial No. 592,846. (No model.) Patented in Canada November 14, 1895, No. 505577.

To (tZZ whom it may concern.-

Be it known that I, VVILLIAM J. NEWER, a citizen of the United States, residing at Old Orchard, in the county of York and State of Maine, have invented certain new and useful Improvements in Feed Devices for Rotary Drills, (patented in Canada November I4, 1895, No. 50,577,) of which the following is a specification.

This invention relates to certain new and useful improvements in rotary drills; and it consists,substantially,in suchfeatures of construction, arrangement, and combination of parts as Will hereinafter be more particularly described. I

The invention has reference more particu larly to that class or type of rotary drills which are employed for boring metal, tapping mains, and for similar purposes, and in connection with Which it is usual to employ some form of saddle for supporting both the drill and feed, as Well as means for securing or fastening the saddle in proper position upon the work. In most instances heretofore a chain or cable has been employed for fasten ing or securing the saddle in place upon the work, and it is due to the tightening effect produced between the chain and saddle that the feed for the drill is caused to be operated in a gradual manner, while at the same time the drill is being turned or rotated to effect the tapping or boring. A chain for the purpose described has its advantages with certain classes of work operated upon, but there are some kinds of work in connect-ion with which it is impossible to employ a chain, due principally to the peculiar shape 'or position of the work structure, and in consequence of which itis quite difficult, if not impossible, to properly use the drill and feed, and the boring or drilling has to be carried out or effected in some other and more tedious and expensive manner.

The purpose and object of the present inven tion are the provision of means for feeding the drill when the saddle is secured in place upon the work, and to enable the drill to be steadied with one hand while the rotating devices therefor are being operated with the other.

The invent-ion has for its further object the provision of means for securing the saddle in place upon the Work in those instances in which it is either impossible or undesirable to use a chain, and also the provision of means forsteadying and feeding the drill whenever I it is impossible to use either a chain or other fastening devices for the saddle, and in which case the saddle itself is dispensed with.

The invention also has certain other objects in view, all as will more fully hereinafter appear when taken in connection wit-h the accompanying drawings, in Which- Figure 1 is a vertical sectional elevation of one form or embodiment of my improved rotary drilhthe said view indicating the use of an ordinary saddle in place upon a piece of work and showing the employment of my improved devices for fastening or securing the said saddle in such position. Fig. 2 is a similar View in part section representing the employment of the preferred means for rotating the drill, as well as the use of a handle or grip for steadyl ing the drill while the same is being rotated.

Fig. 3 is a View in detail of a modification in the construction of the handle or grip and indicating in connection therewith the feed devices which are employedv in those instances in which the use of the saddle and its fastening devices is either impossible or undesirable. Fig. 4c is a horizontal sectional view on the'line a: m, Fig. 2, so as to indicate in plan the construction and arrangement of the preferred form of friction-operating clutch for the drill. Fig. 5 is a bottom plan View in detail of one part of the clutch device.

While I may resort to a great many different embodiments in practice and may make such immaterial changes in the general form of the several parts as the exigencies of the case may demand, I prefer in most instances to employ either of the forms such,.for instance, as I have herein illustrated. As in some former drills I employ in those instances where it is convenient to mount the drill directly upon the Work some suitable form of saddle, and while many different kinds could be used I have preferably adopted the saddle 1, having in this instance a screw-threaded central opening 2 for the passage of the feedtube 3, and secured or attached to one side of the said saddle 1 is a clamp or like device t for attachment to the work to be operated upon by the drill, and which said clamp will hereinafter be more particularly described. The said feed-tube 3 is screw-threaded at 5 on its exterior, so as to be fed gradually forward or downward through the screw-threaded openingin the saddle and the tube turns at its lower end on ball-bearin gs 3 Passing loosely through this feed or tube is the drill stock or holder 6, having at its lower end the enlarged head 7 for receiving the drill'S, and this drillholder is tapered and squared at its upper end at 9 to receive an ordinary brace or similar device for rotating the holders and drill. Below the said tapered and squared portion 9 the drill stock or holder is formed with a short screwthreaded portion or section 10, upon which is screwed an adjusting-nut 11, which is employed for regulating the friction devices for the feed to be described, and projecting from the side of the said drill stock or holder at any point below the screw-threaded section 10 is a lug or shoulder 12, which, in addition to the principal function to be ascribed thereto, serves,in conjunction with the enlarged head of the stock, to prevent the latter from slipping out of the feed-tube 3 in either direction.

As thus devised and arranged, some means or provision is of course necessary for operating the drill-feed as the drill is rotated, and while many different forms or embodiments of feed-operatin g devices could be employed for holding the drill to its work I preferably employ in this instance a friction device, which I have herein shown, and which I have found to be exceedingly simple and far superior to any other form known to me. This preferred frictiono )erating device for the drillfeed comprises as its essential feature a disk or washer 13, of leather or other similar material, and while the arrangement thereof with respect to its cooperating elements could be considerably varied I have found it convenient and advantageous to employ it in the connection and manner such as is herein shown. Thus I provide the upper end of the friction-tube 3 with an annulus or flange 14: of proper dimensions, and upon the same I place the leather disk or washer 13, the latter being provided with a central opening 14, by which to enable it to be readily passed down into place over the upper end of the drill stock or holder. Fitting or screwing upon the threaded section 10 of the drill stock or holder 6 is a clamp 15, which is formed with a vertical notch or groove 16 to receive the lug or shoulder 12 on the upper part of the holder, and by which means the said clamp is prevented from turning or rotating inde- -penden tly of the drill-stock, while at the same time it is readilyremovable lengthwise of the stock, as is apparent. For the purpose of effecting or generating the necessary or desired amount of friction to properly feed the drill, as well also as to enable the proper regulation of the feed, I employ the ad justing-nut degree.

11, hereinbefore referred to, and it is evident that by screwing the said nut down upon the clamp with a greater or less pressure the friction-tube will be affected in a corresponding It is obvious that other adjusting and regulating devices could be employed, but these are the preferred devices, although I do not wish to be limited thereto in precise detail.

Vith the construction shown in Fig. l the drill can be operated in the usual way by applying to the upper end of the stock or holder any ordinary brace orsimilar device, but I prefer as a medium for rotating said drill stock or holder the special friction clutch device shown in the remain in g figures, which form, however, could also be considerably varied in immaterial respects. In connection, also, with the remaining figures of the drawings I employ a handle or grip for the purpose of steadying the structure with one hand while the drill is being rotated with the other, as well as a clamp for the work and a modified form of friction-feed, which is used in those instances where it is impossible to use a saddle and clamping device therefor. These several features will be referred to in order, and then will follow a description of my improved workclamp, which is designed to take the place of the chain as ordinarily employed heretofore for a similar purpose. Thus the said friction clutch devices for rotating the drill comprise a block or main body portion 20, which is preferably of a circular shape or contour, and which, if desired, may be of weight sufficient to act as a sort of counterbalance for the drill. The said block is sunken or recessed in its upper surface at 21, leaving an upwardly-projecting annular flange or shoulder 22, and it is provided on its under side with a neck 23 and is provided with a central opening 24, passing entirely through the neck and block, as shown. This neck and central opening are for the purpose of receiving and effecting a connection between the block and the upper end of the drill stock or holder, which latter passes upwardly through the opening and partially enters the handle or grip, to be described, and as a preferred means of 'connectin g the parts I employ a setscrew 25, which passes through an opening in the side of the neck and bears or impinges at its inner end against the side of the drillstock. This form of fastening permits a ready detachment or disconnection of the parts when desired, and of course I could resort to other equivalent devices for the same purpose. Located or arranged within the sunken or recessed surface of the block 20 are preferably four independent loose cams 26, the same occupying a trulyconcentric arrangement with the central opening of the block. The outer edges 27 of these cams are struck on curved lines which if continued to intersect or join each other would complete a circle of which the axis of the block is the center, and the inner edges 28 of the said cams are also struck on curves each of which if continued around would complete a circle of which the center would be formed at a point intermediate the corners 29 of the cams and directly at the outer curved edges thereof. It will be seen that the cams are disposed on the upper surface of the block at diametrically opposite points and that there are spaces 30 between the cams, as well, also, as spaces between the inner edges of the cams and the central opening of the block. The disposition is such as to leave sufficient room between the upper end of the drill-stock and the inner edges of the cams for the reception and accommodation of a square metal clutchblock 31, which in this instance is formed on the under side of a handle or grip 32, (heretofore mentioned,) both the said block and grip being provided with an opening or recess 33 to admit entrance and passage of the upper end of the drill stock or holder, as shown. The said clutch-block fits snugly within the space thus provided for its reception and in such manner that unless special means were provided for the purpose it would be impossible to effect any turning of the said block for effecting the operation of the drill, since it is evident that to attempt to turn the block around the upper end of the stock would tend to carry both the sides and corners of the block outwardly in such manner as to cause a locked impingement upon the inner edges of the loose cams. Therefore in order to rotate the drill-stock in the proper direction, as the right-hand direction, I prefer the simple and effective arrangement about to be described, although I am not strictly limited thereto, as is to be understood. Thus, as will be seen in Figs. at and 5, in each corner of the said operating clutch-block is secured a pin 40, the arrangement of said pins being at right angles to each other, and the ends thereof bearing or impinging upon those corners of the cams which offer a resistance to the turning of the body portion or block by a force applied in the right-hand direc tion, or, in other words, those corners of the cams against which it is necessary to apply a force to move them in the left-hand direction. In still other words, the arrangement is such that upon application of a force in a right-hand direction the square block and the cams become locked or clutched and the block 20 and drill-stock are thereby turned, whereupon on applying a force in block or else be secured rigidly thereto in anysuitable manner. For the purpose of preventing the grip 32 from being accidentally displaced While the drill is in use, as well, also, as to constitute practically a united structure of the clutch-operatin g devices and grip, I provide a fiat annular plate or ring 46, which is secured to the annular flange 22 by screws 4:? or otherwise, and the inner edge of which ringoverlaps the upper edge of the block 31, as shown. This ring also prevents the access of dust and dirt to the spaces between the cams and clutch-block and in that capacity serves as a guard for the cams, the clutch-block, and the projecting pins of the latter.

As heretofore stated, a chain is very often employed in connection with the saddle 1 for securing or fastening the drill and its several parts in place upon the work, but inasmuch as with some kinds of work, for instance, flat surfaces, it is impossible to use the chain with good results I have devised a special form of clamp to take the place of the chain, and while the clamp may be modified in many different ways I have found the construction herein shown to fully subserve the intended function, and therefore prefer the same for all ordinary purposes. Thus, as shown in Figs. 1 and 2, I form in one end of the saddle 1-a screw threaded opening 50, screwed into which is a pin or plug 51, and onto the said pin or plug is fitted the upper end of a rod 52, the attachment being made by set-screw 53 and the said rod 52 being screw-threaded at 5 L fora suitable distance from its lower end. The said rod passes down through openings 55 and 56, formed, respeotively,in jaws 57 and 58, which jaws are connected at their outer ends by means of an adjusting set-screw 59, having a head 60, adapted to be readily turned by.

hand. The lower end of the said screw is received in a depression 61 in the lower jaw 58 and the main stem of the screw works in a screw-threaded opening 62 in the'upper jaw 57, the purpose of the screw being to press or adjust the jaws together upon the work. The screw-threaded portion 54 of rod 52 is provided with set- nuts 63 and 64, which are screwed againstthe jaws of the clamp, so as to firmly hold them in the positions to which they may be brought.

In addition, also, to those instances in which it is impossible to employ the chain with good results it also happens, sometimes, that even a clamp, such, for instance, as I have herein shown and described, cannot be used to secure or fasten the drill and its feed in proper position upon the work, and therefore it becomes necessary to provide still further for this contingency, and while provision could be made, no doubt, in various ways I have found the arrangement and construction which I am about to describe to be both IIO practical and effective, and of course it will I friction-tube can be temporarily dispensed with, although it will be understood that these elements constitute important features of my invention for all general purposes. Thus by referring to the construction in Fig. 3 it will be seen that the handle or grip 32 is bored out at 70 for a suitable distance from the upper end thereof, so as to constitute a longitudinal opening, which, as shown at 71, is screw-threaded, and into this threaded opening is inserted a threaded pin 72 of any desired length, and which pin is formed with a centered conical upper end 73, adapted to bear in or against any suitable bearing, such as 74, so as to obtain the necessary degree of back pressure forthe drill to effect the proper action of the friction feed device for the drill. This said bearing or resistance may be had by building up from a floor or outward from a wall, or otherwise, and on starting to use the drill the screw-threaded pin is turned or backed outwardly of the threaded opening in the handle or grip just far enough to reach to the said bearing or back-pressure resistance and to be made tight enough to centralize the drill and sustain the weight of the machine, while in order to enable the drill to be started the point of the latter is rested in a punched hole in the work, which holds the drill steady. In this way the same degree of back pressure or resistance is had as is derived from the use of either a chain or the clamping device, and my improved rotary drill is thus rendered available in those instances where the use of either a chain or clamp is impossible. As occasion requires, the feed is effected by turning the pin outwardly from time to time, a squared head and projecting fingers being provided at the upper end of said pin to enable a turning thereof either by means of an ordinary wrench or by hand.

As before stated, the machine may be operated either by a continuous rotary movement or by such movement as is imparted to the ordinary ratchet-clutch, and it will be observed that the friction-feed produced between the leather washer, the cap, and the annulus is automatic and thoroughly effective. As the operating hand-lever is moved forward to effect the thrust of the drill the cams 26 are clutched by the operating-block 31 in the manner already explained, and then as the operating hand-lever is brought back to have its forward movement repeated successively the said cams are caused to move in the recess of the body portion of the clutch device to an extent equal to the width of the spaces between each two of the cams, the said movement being caused by impingement of the pins, as has also been explained. It is thought that the construction and operation will be thoroughly understood, and it will be seenthat the handle or grip 32 enables the machine to be held steadily in place upon the work, whether the construction of Figs. 1 and 2 or Fig. 3 be resorted to.

What I claim is- 1. A rotary drill comprising a rotary-drill stock or holder adapted to receive a brace and provided at its upper end with a detachable handle or grip, a feed for said holder, and means attached to the grip and detachable therewith, for rotating the stock or holder, substantially as described.

2. Ina rotary drill, a drill stock or holder, means for rotating the same, and a feed therefor, the said means comprising a clutch-section detachably fitted to the drill, and another clutch-section cooperating with the first and detachable therefrom, and constructed in part of a handle and an operating-lever, substantially as described.

3. In a rotary drill, a drill stock or holder adapted to receive a brace and means for rotating the same, the said means comprising a clutch-section detachably fitted to the drill, and another clutch-section cooperating with the first and detachable therefrom, the latter section being constructed in part of an operating-lever, a handle or grip having a threaded bore, and a feed-screw fitting in said bore, substantially as described.

4. A rotary drill comprising a saddle and means for securing the same to the work, a rotary-drill stock or holder provided at its upper end with a detachable handle or grip, and means attached to the grip for rotating the drill, substantially as described.

5. A rotary drillcomprising a saddle, means for securing the saddle in place upon the work to be drilled, a drill stock or holder, a threaded feed-tube working in the saddle and friction devices for operating the feed, the same comprising a leather disk, a clamp for the disk, and a regulating-nut for the clamp, substantially as described.

6. In a rotary drill, a drill stock or holder, a handle or grip therefor, a feed, and means for rotating said holder, the said means comprising an operatinglever, a block having a recessed surface, and an annular rim or shoulder, cams arranged in said recessed surface with spaces between the cams and a rectangular clutch block seated centrally between said cams and having projecting pins impinging on corresponding corners of the cams, substantially as described.

7. In a rotary drill, a feed, a drill stock or holder, and means for rotating the holder, the said means comprising a block with a neck and a central opening passing through the neck and block, a recessed annular rim or shoulder on the block, cams arranged within said rim or shoulder with spaces between the same, and a rectangular clutch-block seated centrally between said cams and having projecting pins impinging on corresponding corners of the cams, the said neck having in its side a set-screw bearing on the drill stock or holder, substantially as described.

8. In a rotary drill, a drill stock or holder, a handle or grip therefor, a feed, and means attached to the grip for rotating said holder,

the said means comprising an operating-lever, a block having a recessed surface, and an annular rim or shoulder, substantially elliptic cams arranged in said recessed surface with spaces between the cams, arectangular clutchblock seated centrally between said cams and having projecting pins impinging on corresponding corners of the cams, and a guardplate inclosing the cams, substantially as described.

9. I11 a rotary drill, a feed, a drill stock or holder, and means for rotating the holder, the said means comprising a block having a recessed surface and an annular rim or shoulder, an operatin g-lever, cams arranged in said recessed surface with spaces between the same, and a handle or grip receiving the upper end of the drill-stock and having at its lower end a rectangular clutch-block, the latter provided with pins impinging upon corresponding corners of the cams, substantially as described.

10. In a rotary drill, a drill stock or holder, means for rotating the same, and a feed comprising a handle or grip removably attached to the holder and having a feed-bore leading from its upper end, and a feed-screw in said bore, substantially as described.

11. A rotary drill comprising a saddle adapted to receive a chain, a drill stock or holder, a feed device, and means for securing the saddle in place upon the work, said means consisting of the clamping-jaws each having an opening, a threaded rod passing through said openings and removably attached at its upper end to the saddle by means of a screw, the nuts on said rod, and the regulating-screw seated in a recess in the lower jaw and Work WVILLIAM J. MEWER.

Witnesses:

F. L. FREEMAN, W. CLARENCE DUVALL.

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