US288957A

US288957A - Albeet sgdekstrom

Info

Publication number: US288957A
Authority: US
Publication date: 1883-11-20
Anticipated expiration: 1900-11-20

Description

(No Model.)

A. SODERSTRM.

SELF OILNG DRILL GHUGK. No, 288,957. Patented Nov. 20, 1883.

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SELF-came DRILL-CHUCK.

SPECIFICATION forming part of Letters Patent No. 288,95*?, dated November 20, 1883. Application filed March 7, 1883. (No model.) Putentedin VSweden September 13, IESE.

To all whom t may concern.:

'Be it known that I, ALBERT Snnnsrnn,

a citizen of Sweden, and a resident of the city in Self-iling Drill-Chucks, of which the following is a specification.

My invention relates to improvements in boring-tools, especially such as are used for boring long or deep holes in metals. It is well known that according as the hole increases in depth by the boring the difficulty of lubricating the cutting end'of the drill in creases, and the drill runs hot, loses its temper, wears very rapidly, and soon gets spoiled, while at the Sametime the bore becomes rough and ragged, instead of smooth, for want of lubrication, and no matter how much oil is poured into it'it ris met and pushed back by the borings filling the entire space between the drill and the bore, which borings constantly keep rising as the drill descends, thus only causing a considerable waste of oil withoutapplying any of it at the point where lubrication should take place.

The object of my present invention is to obviate this great difficulty, and to providea simple and efficient means whereby the oil or other lubricant will always be applied at the extreme cutting end of the drill no matter how deep the hole is required to be bored, the

cut will be smooth, a proper temper of the drill will be maintained and its wear greatly reduced, and the time heretofore wasted in stopping the motion, removing the drill to clean the borings out of the hole, again inserting the drill, and starting its motion willbe saved.

In Ithe accompanying drawings, Figure l represents a horizontal section of a drillchuck with drill attached as when used in a lathe for drilling holes, or it may be considered a vertical section if used in an lupright boring-machine or drill-press. Fig. 2 is a section similar to Fig. l of the drill-chuck with a handle attached for the manipulation of filling the reservoir. Fig. 3 is an end view of the drillchuck as seen inthe direction of arrow 1 of Fig. 1, and illustrating the mode of holding it stationary in the lathe,'while the article to be bored is secured in the revolving lathe-chuck. Fig. fi is a section similar to Fig. 2, showing my invention applied to an ordinary ratchet-drill.` 5 and 6 are detail views of modifications of the upper end of the drill. Fig. 7 is a detail cross-section yon a larger scale, the section being taken on the line .fr :c of Fig. 5.

Likev letters of reference indicate like parts in the several figures.

A is the ordinary twist or spiral drill for boring metals, and provided at its upper end with a conical head, A', adapted to be inserted into a socket of the drill-chuck. The said conical head has a cylindrical portion, a', at its junction with the drill proper, and a flattened portion, af", at its cxtreme end, which fits into a similar socket or notch in the drillchuck, to prevent the drill from turning in the chuck. From the eXtreme upper end of the drill .A to its cutting-edge is formed an oilv channel, a. This is done preferably by mak` ing a'groove in the cylindrical surface of the drill and inserting into the said groove a fine tube, as shown in Fig. 7, the said tube being then soldered into the groove and the space outside of it lled with tin, so as to be even with the cylindrical surface of the drill. lt will be seen that by thus arranging the oiltube t it will not be exposed to wear, as it would be if placed in the spiral groove, where the borings rise. The conical head A.' should be of the same size for several sizes of drills, so as to adapt them to be used in the same chuck. For smaller drills I therefore preferably make the said head A' of a separate piece, with a portion of the oil-channel a formed into it and leading into the upper end of the socket in the said head, in which socket the small-sized drill is inserted and securedby soldering, as shown in Fig. G. To insure a firm hold of the drill in the said socket of the head A', it may be provided with a fine thread, as in said Fig. 6, thus giving a larger surface of contact with the tin or other easily-melted solder.' The drill-chuck is formed of ahollow cylindrical vessel, B, provided with anipple, B', into which is formed a conical socket and a notch or recess, intended to receive and `tightly hold the conical drill-head A' and its projection a2, respectively, as shown in Fig. 1. The nipple B' is threaded on the outside suitably to receive a cap-nut or packingnut, D,

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by which suitable leather or other packingrin'gs, d, are tightened securely 'around the cylindrical portion c of the drill-head A. Through the solid metal, between the hollow cylindrical portion of the drill-chuck and the socket which receives the drill-head, is bored horizontally a fine channel, C, which has a narrow valve-seat opening, closed by a tapering needle-valve or block, C', which is adjustable by means of a screw, c', the latter forming one piece with and the outer accessible portion of the said valve. The horizontal channel C is connectedat alternate sides of the valve-seat by small vertical channels c to the interior of the vessel B and the drill-retaining socket in the nipple B. Upon the outer` surface of the cylinder B are provided ribs b,

. by means ,of which and a suitable hooked bar,

G, supported upon some stationary portion, H; of the lathe, it may be held fast and prevented from turning, being simply fed forward by the usual vfeed of the center F, while the metal tol be bored is fastened to the chuck at the other lathe-center and revolves with it. On the inner surface of the cylinder B, parallel with its axis, is a groove, b. E is a piston fitted tightly within the cylinder B, being provided with a suitable piston-packing, e, tightened and expanded by a ring-nut, e', threaded upon a vcentral portion, c2, of the piston E. The said piston E is also provided with a conical centrall recess for receiving the end of the lathe-center F, andthe said conical recess is extended by .means of a threaded socket, f, adapted to receive the threaded end of a handle, I, (shown in Fig. 2,) for purposes hereinafter to be stated. The piston E is also-provided with a projection, g, threaded or otherwise secured into its surface, the said projection being of proper shape and size to fit and slide into the groove b in the cylinder B when the pistouE is depressed into the cylinder B, and thus serve to prevent the piston from being revolved within the cylinder. The cylinder B serves as a reservoir to be filled with oil or other suitable lubricant. The oil being poured in, the handle I is secured to the piston E and the latter inserted in the vcylinder B, the air above the oil-space escaping through the groove b until the piston is pushed past the said groove. The chuck is then preferably inverted, as in Fig. 2, allowing the air to ascend to the opening c. The screw-valve c is then opened a little, while the piston is pushed forward by the handle I, thus expelling the air from the cylinder B, until the oil by the pressure has reached the point of -the drill through the channel a. The handle I is then removed from the socket f, and the drill is ready for operation. During the drilling the feed-pressure upon the center F, by which the drill is pressed forward to cut into the metal, also acts directly upon the oil contained in the cylinder B, forcing it through the channel c, down to the very cutting-edge of the drill, and, the feed-pressure on the oil being exactly .ing boilers, Snc-and in all such cases there has heretofore been no mode known by which the point of the drill could be lubricated, except the usual Way of constantly removing the drill and squirting in a few drops of oil by an :ordinary pneumatic oil-can into the cavity made by the drill; but by this means it is evident that the point will always be lubricated so long as there is any oil left in the cylinder and any feeding forward of the drill to cut its way through the metal.

' Experiments made have proven that holes of one inch diameter and twelve to fourteen inches depth may bebored through solid metal in one continuous run without overheating the drill, and leaving a smooth surface of the bore.

Having thus described my invention, I claim as new and desire to secure by Letters latentl. vThe combination of a drill, alubricatingvessel, a conduit leading from the said vessel to the cutting end of the said drill, and means actuating the lubricating matter in the said vessel by the feed-pressure on the said drill.

2. A drill or boring-tool having within its surface a lubricating-conduit leading to the IOO cutting end of th e said drill, said conduit form ing a part of and thus revolving with the said drill, for the purpose set forth. 3. rIlhe combination, with a drill or boringtool, A, having along its surface a groove leading to its cutting end, -of a lubricating-tube, c, said tube being secured in and along the said groove and within the circumference of the said drill, substantially as and for the purpose set forth.

4. The combination of a chuck formed of a lubricating-receptacle, B, a follower or piston, E, within the said receptacle, a drill-holding device, B', a conduit or conduits, a, connecting the said receptacle'with the lcutting end of said drill, and means exerting pressure upon the said piston, substantially as and for the purpose set forth.

5. The combination of the lubricating-receptacle B, the nipple B', provided with a -drill-holding socket, a conduit, e O c, connecting the said receptacle and socket, and the follower or piston E, substantially as and for the purpose set forth.

6'. The combination of the piston E, the oilreceptacle B, the nipple B, a packing device, D d, and socket to receive the drill, the contially as and for the purpose set forth.A

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' duits c C c, and the screw-valve C c', substany 7 The oil-receptacle B, provided with drili- In testimony that I claim the foregoing as my holder` B', and conduits c C c, as described, invention I have signed my name, in presence 1o and having `im interior guide-groove, b', and of two Witnesses, this 24th day of January, exterior retaining-ribs, b, in combination with 1883.

5 the piston E, having a side projection, g, and ALBERT SODERSTROM.

with means, G, prevehting the revolving of WVitnesses: the said pieoe B by Contact with the said ribs AUG. ZUREN, o, substantially as set forth. NERE A. ELFWING.