US698242A - Drilling-machine. - Google Patents

Description

Patented Apr. 22, |902.

s. A. BAKER.

nmLLimi MACHINE.

Application med Aug. 17, 1901.)4

(No Model.)

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No. 69:3242. Patented Apr. 2 2, |902.

s. A. 'BAKE-. DBILLING MAcHmE.'

(Application mea Aug. 17,19o1.)

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` No. 698,242., y {.Pa'femedApr. 22, |902.

" s.1\. BAKE'n.

DRILLING MACHINE.

4 Shets-Shest 3Q (Applied-ion @led Aug. 17, 1901.)

(No Model.)

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No. 698,242. Patented Apr. 22, .|90'2.

, S. A. BAKER.

DmLLlns MAcmNE. v (Application med Aug. 1'7, 1901.) x (No Model.) 4 Sheets -Sheet 4.

r l l0 l vf7v 20 Z Q f f Ww W ATTORNEY I sor UNITED STATES SAMUEL A. BAKER, OF SPRINGFIELD, VERMONT.

DRILLINGPMACHINE.

SPECIFICATION' forming part of Letters Patent No. 698,242, dated April 22, 1902. .ippiicaionneanugust17,1901. serai Nansen. (roman.)

To all whom t may concern: e Be it known that I, SAMUEL A. BAKER, a

' citizen of the United States,residing at Spring-Q which the following is a'specification.

My invention relates to drilling-machines, and more particularly to that class of drilling-m achines wherein is employed a'movable turret or head designed to carry a series of tools-such as taps, drills, reamers, dsc.- which are brought into operative position successively or as may be desired. v

My invention consists in the construction' and arrangement of parts as hereinafter de-V scribed in the specification and finally pointed out in the claims. V i

In the drawings formingapart of this specitication, Figure 1 is a perspective View of a tur-i ret-drill embodying` myimprovements. Fig. 2 is a top view thereof. Fig. 3 is'a front View, on an enlarged scale, of theupper part'of the drill and the connected parts. Fig. 4l is a ver tical sectional view, on an enlarged scale, of the upper part of the drill, taken through the turret. Fig. 5 is a vertical sectional view, on an enlarged scale, of the lower part of the machine, showing the parts contained within the lower supporting-column. Figs. 6 and 7 are detailviews,upon an enlarged scale, showing respectively in perspective and in section the connections for imparting an automatic feed to the spindles.

Asshown in the drawings, the main frame of the drill consists of the flat base-piece 1 and the hollow tube or column 2, bolted there` on. Mounted telescopically above the column 2 and partly within it is a second hollow tube or column 3, which carries the turret and other operative parts. The top of the column 2 is formed as a split ring 14, provided with a bolt and Wrench 15, the said ring 14: embracing the column 3 in such manner that when tightened thereon by means of the bolt and wrench 15 the said column 3 will be held in adjusted position with reference' to the column 2. The platen-bracket 9 is provided with a split ring in such manner as to embrace the column 2 and to beheld in adjusted position thereon when tightened by the bolt and wrench 16. yThe platen Sis mounted revolubly in a split ring at the other end of bracket 9, so that it may be pivotally turned to adjusted position and firmly held thereby means of the bolt and wrench 11, arranged to tighten the split ring about the. cylindrical lower portion 10 of the platen. The platen 8, together with its 'bracket 9, is vertically ad- `justable'upon the column 2 by means of the 6o screw-threaded shaft 13, journaled'at its-bottom in the base-plate 1 and at its top in the ring 14. of the column and passing through a. screw-threaded aperture in the ring 12, which is seated in a correspondingly formed groove in the lower part of the bracket 9. It will be obvious that by rotatingthe shaft 13 by means of a wrench Ior other instrument the bracket 9 may be adjusted vertically to any desired position with reference tothe column 2 and 7o fastened in its adjusted position by turning up the wrench 16. It will be further seen, because ofv the arrangement of th-ering 12, seated loosely within the groove in the bracket 9, that the said bracket 9 may be radially ad- 7 5 justed or may be given a partial rotation, so as to swing the bracket and the platen 8, supported thereby, entirely out of operative po-V sition, as shown in Fig. 1. This latter operationis desirable in case the Work to be op- 8o erated upon is too large to be supported by the platen and it is desired to place it upon the base-piece 1.

The main operative shaft 7 of the machine is located within the hollow columns 2 and 3 8 5 and isjournaled at its lower end in the basepiece 1 and at its upper end in the top of the column 3, through which 'it passes freely, so

-as not to interfere with the longitudinal move- -ment'of the said column 3.

j Powerisimparted 9o to the counter-shaft 5, suitably mounted at the base of the machine, by means of-a loose pulley arrangement 4: or in other suitable manner, the said power being imparted from the counter-shaft 5 to the'main shaft 7 by 95 means of bevel-gears 6, locatedwithin the column 2, as shown in Fig. 5.

In order to provide an automatic means for raising and lowering the column 3, together withv its attached parts, I have providedthe Ico lower portion of the column 3 with a lug or projection 2l, havinga sorew-threaded aper-` ture for engagement with the screw-threaded shaftlS, placed within the column 2 and jour-` b naled at its lower end in the base-piece 1. The shaft 18 has a key or feather and is provided with a spur-gear 19, splined thereto. The hub of the gear 19 has a groove, which is engaged by the bifurcated end of the foot-lever 20 in such manner that when the foot-lever 2O is operated the gear 19 will be brought into engagement with the gear 17 upon the main shaft 7, thereby rotating the screw-shaft 18 and raising the column 3 and its attached parts to the desired position, where it may be Iirmly secured by tightening the split ring 14 in the manner already described. lVhen the desired elevation has been given to the column 3 and the foot-lever 2O is no longer operated, the weight of the gear19 is sufiicient todisengage it from the gear 17 and to restore it to its normal position. It will be obvious that the upper column and attached parts may be lowered similarly by reversing the motion of the main shaft 7.

The turret-holder 35 is bolted to the column 3 near its top and is formed with an elongated cylindrical space within, so as to embrace the correspondingly-shaped cylindrical head or turret 36, which is supported in the turretholder 35 by means of a circular flange formed at the top of the turret in such manner as to hold it in position, butto permit of its manual rotation within the turret-holder. (See Fig. 4.) Mounted within the turret 36 are a series of vertical spindles 31 31 for the operation of the tools 39 39, which are attached to the bottom of these spindles in the customary Inanner. I have shown four of these spindles in the drawings; but it will be obvious that this number may be increased or diminished, as desired. `The spindles 34 are mounted in the turret concentrically in such manner that when the turret is rotated any selected one may be brought into operative position at the front of the machine. Each spindle 34 is normally maintained in its highest position by means of a spring 41, surrounding the spindle and seated within the turret and pressing at its upper end against a collar or washer 40, attached to the spindle. Each spindle 31 is also provided with a rack 44, formed upon the side of a sleeve 42, through which sleeve the spindle passes and within which it is free to rotate. The said sleeve 42 is, however, embraced between two collars 43 43, formed upon the spindle 34in such manner that when the rack 41 is `actuated by the pinion 45 in the manner hereinafter tobe described the spinlle 31 is fed downward in the desired manner. The springs 41 and sleeves 42 are contained within suitably-formed recesses in the turret 3G, as clearly Ashown in Fig. 4, and the racks 44, formed upon the sleeves 42, project into adjoining recesses in the turret 36, thus permitting the rotation of the spindle 34 within the sleeve 42, but preventing the rotation of the box itself. Y

The required movements are imparted to the various operative parts from the main shaft 7 through the bevel-gear 21, which is located at the top of column 3 and splined upon the shaft 7 to secure its rotation thereby. Motion is imparted from the bevel-gear 21 to the bevel-gear 22 on the shaft 23, suitably mounted upon the column 3 and turretholder 35, and the shaft 23 is provided at its other end with a second bevel-gear 24, which in turn meshes into bevel-gear 25 upon the shaft 26, carried in suitable supports upon the turret-holder. The shaft 2G is provided at its farther end with the bevel-gear 27, which meshes into bevel-gear 28, supported on a stud upon the projecting piece 37 of the turret-holder 35. (See Fig. 4.) Integral with the bevel-gear 28 and beneath it is the spurgear 29, from which motion is imparted to the spur-gear 30, fixed upon the short vertical shaft 31, which is journaled at its lower end in the projecting piece 38 of the turretholder 35 and near its upper end in the projecting piece 37. From the shaft 31 motion is imparted to the automatic mechanism for feeding the spindles longitudinally in the manner hereinafter to be described. The spur-gear 29 meshes at its other side into the pinion 32, mounted upon one of the spindles 34, and thereby imparts the rotary movement to the said spindle. Each of thespindles 31 has splined to it such a pinion 32, and as each spindle is brought into and locked in its operative position its pinion 32 is caused to engage with the actuating spur-gear 29, thereby effecting the rotation of the spindle, the splined connection permitting at the same time the longitudinal movement of the spindle. The pinions 32 are held against upward movement by means of a stop or bearing piece 33, attached to the turret and bearing upon the top of thc pinions.

As previously indicated, the downward feed of the spindle 34 is effected through the medium of the rack 44, connected thereto, which rack is moved by the pinion 45 when in engagement therewith.

Located at the front of the turret-holder and between its two projecting portions 38 38 is a movable box 48, capable of a limited sliding movementin and out, which sliding movement is imparted to the boX by means of the pivoted hand-lever 91, provided with the eccentrically-located pin 95,which engages with a groove 9G, formed in the side of the box 48. The sliding box 48 is further provided with a spring-seated pin 76, which pin enters and engages with one of the series of holes 77, formed in the turret, so as to hold the turret firmly in IOO IOS

IIC

position when the selected tool is brought into cese-12 turret 36 in adj usted position by means of the engagement 0of the pin 7 6`with the hole 77. The pinion is suitably mounted in the box 48 and'fgears into a chainof gearing 46 46. The outside gear of the series 46 is fast upon a transverse shaft 47, which is mounted in the box 48, and the ends of which pass throughand beyond the boX and also through and' beyond slots 49 in the framing 'which supports the box 48 and which slots 49 permit the movement of the shaft 47 due tothe slidingof the box48.` (See Fig. 3.) At one end of the shaft 47 is the Worm-gear 5l, and at the other end of the shaft 47 is'the handle or lever 50 to enable a quick return motion to be given to the shaft'47 when desired; Motion is giv'ento the Worm-gearl by the worm 52."l

The worm 52 is mounted in a bracket 53, pivoted at 54 to the `front of the'machine, which bracket 53 is swung upward`(see Fig. 6) at the desired time in such 'manner thatthe worm 52 is brought into engagement with the Worm-gear 5l, the bracketbeing then held inv operative position byreaso'n of the springpressed pawl or catch 68,he'reinafter tobemorevfully described. When the turret has' been turned to'the desired'position, the b'oxj 48'is moved inwardly by meansof the hand- 'lever 94, thereby engaging the pinion 45 with the rack 44, and at this time the bracket 53 is swung upward, so as to engage the Worinv 52 with the Worm -gear 5l, and the desired' rotation may be manually imparted to the Worm-gear 5l by means of the handpiece 55, attached to the worm 52, (seeFig. 7 the actuation of the worm-gear lthroughthe shaft 47, the gears 46 46, the pinion 45, and the; rack 44 imparting to the spindle the'desired feed or downward motion. I have provided, however, a means for imparting to the W'orm Y 52 an automatic operation as distinguished from the manual operation just described. The' worm 52 `is hollow and has passing through it shaft 58, (see Fig. 7,) screwthreaded at one end andp'rovidedlwith a filling-piece 56 anda screw-threaded nut'57,

forming, in effect, a clutch in connection withlv the handpiece 55, sothat Ywhen the nut 57 is l turned up the shaft 5.8 is tightened within the worm 52 in such manner that its rotation' caiisesthejrotation also of the'worm 52.' At its otherend the shaft 58 is'provided with a bevel-gear 59, meshing into a similar bevelgear upon the vertical shaft 60, which shaft shaft 31, `previously described,'in'such man` ner that the speed-gears 62 are'compelled tok rotate therewith, but are capable of 'longitudinal adjustment thereon'. 'The longitujof'the spindle.

dinaladjustment of the speed-gears 62 upon the shaft l3l is effected by a` hand-lever 64, pivotedat 65 and engaging `with agroove in the sleeve 63. The hand-lever 64is also provided with a spring-pressedicatch or detent 66, adapted to engage with the holdingnotches of a rack 67, whichl notches are so arranged as to insure the' selection and engagement of any desired pair of speed-gearsor of their complete disengagement if it be desired to feed the spindle by hand. It will therefore be 'obvious that by clutching the shaft 58 to the worm 52 in the manner previously described andby the engagement of any/selected pair of vthe speed-gears 61 and; 62 lthe desired speed may be automaticallygivento the `pinion 45 and the desired downward-feed of the spindle 34 secured. I have found-f it desirable 'in connection with thesedevices-for` ee'cting anautomatic feed of the spindlestov provide va'stoppin'g device whereby theT feeding mechanism maybe thrown out of'engagement when the desired 'extent of* feed fhas been secured. I haveipreviouslyreferred-to the spring-actuatedcatch or-pawl 68,'which is employed to 'hold thel bracket 53 and worm 52 in operative position' and which when Eremovedpermits the bracket 53 to drop.- gravity (see dotted lines, Fig. 6) and breaku the connectionbetween the worm 52 and the worm-gear 5l; This'catch or pawl68=isjpiv oted,'as`sl1own in the drawings, andlprovided with a beveled surface to permit the-upward passage past it of the pivoted bracket53and formed to engage vit wheninoperative position. Attached to the opposite end ofA this pivoted catch 68 isan arm 69, which'fpass'es through a supporting-collar 74,"for1ned`uponI At its upper end themed* the turret-holder. 69 is attached to the trip-lever f 70, whichvis pivoted at'7l'to the upper frame of the tu'rret-holder.' Interposed between thesupporting-collar 74 anda fixed projection or washer '73"upon the arm- 69'isa spiral spring 72,--so` arranged asf to 'cause a constant` downwardr 'pressure upon the washer 73 in such manner that the pivoted catch or pawl68 and -thelever`70 wil1 he normallyheldin the positions shown in Fig. 3.

Each of the 'spindlesf34is provided with an' adj ustablestop or projec- IOO IIO

tion 75, which may be adjustediat: any? desired height upon the' spindle and Whichf inv the downward feed-of the spindle engages -with'the inner end of theflever 70;- By thev `suitable location of thisstop upon'the spindle it will be seen that the lever 70 lmay''lo'e ntripped at any desired point'during the downward movement of the'spindle. 'The contact ofthe stop 75 withthefend of thelever'70 and its 'further downward Vmovement causes the elevation of the'outer end of the lever, the elevation of the rod 69, 'and'thetripping o ffthe pivoted catch 68, whichpermi'tsthe dropping of the -pivoted bracket 53 andthe disengagement of the Worm 52from the wormgear'l, thereby arresting the downwardfecd I have herein described a form of drillingmachine embodying my improvements; but it will beobvious that many changes and variations may be made therein Without departing from the spirit of my invention.

Having thus described my invention, what I desire to claim and secure by Letters Patent of the United States is as follows:

l. In a drilling-machine, the frame comprisin g a base-piece, a hollow column secured thereto, and a second hollow column telescopically arranged with reference to the ii rst, a suitably-actuated main shaft located within the hollow columns, and a screw-threaded shaft similarly located and in engagement with the upper column, together with means for gearing the screw-threaded shaft to the main shaft.

2. In a drilling-machine, the combination with the frame comprising a base, a hollow column secured thereto and a second hollow column telescopically arranged with respect to the first, and provided with means forraising and lowering it, of a main shaft located within the two hollow columns, stepped at its lower end in said base, passing through the upper end of the upper sliding column and there provided with a splined transmitting-gear, and means for rotating the main shaft; substantially as described.

3. The combination with the cylindrical casing or holder, having an opening at one side, and feed-gearing exterior to the casing or holder with one of its gears at said opening, of a cylindrical turret mounted in said casing and provided therethrough with a circularly-arranged series of longitudinal bores, each opening laterally out through the outer side of the turret to register with the single opening in the casing, a series of spindles eX- tending through said bores and provided adjacent to the side openings thereof with feedracks, adapted to be engaged by the feedgear at the casing-opening, driving-gears splined to the spindles at the top of the turret, driving-gearing with which any of the spindle-gears may mesh for continuous rotation and means for normally holding the spindles raised; substantially as described.

4. A drilling-machine comprising a telescopic column or standard, a main drive-shaft extending up through the standard and provided with a transmitting-gear splined thereon above the upper member of the column, a cylindrical turret holder or casing mounted on the said upper column member and provided with a lateral opening through one side, feed-gearing mounted on the turretholder with one of its gears adjacent to said opening, a cylindrical turret mounted in said holder and having a series of lateral openings leading from said bores to register with the opening in the turret-holder, springraised spindles in the said bores, feed-racks vmounted loosely on the spindles within said bores and exposed through the lateral openings for operation by the said feed-gearing when brought into register therewith; substantially as described.

5. The combination with the cylindrical tu rret-holder having an opening through one side, feed-gearing mounted adjacent to said opening, a cylindrical turret mounted in the holder, and having a circularly-arranged series of bores, each having a lateral opening to register with the openingin the turretholder, a series of spindles mountedin said bores and having feed-racks at the lat-eral openings for engagement withsaid feed-gear when brought into register therewith, drivegears splined on the spindles at the top of the turret,a main drive-shaft,acommon driving-'gear mounted on top of the holder for `engagement with any one of the spindlegears, and gearing mounted on the holder and connecting said common driving-gear to the main drive-shaft; substantiallyasdescribed.

G. A turret-drill comprising, a cylindrical holder or casing, a cylindrical tu rret mounted to turn therein, and provided with a series of drill-spindles extending through it and each provided at the top of the turret with a splined drive-gear, feed-gearing mounted at the side of the turret-holder andhadapted to engage each spindle to feed the same when brought into register therewith, a common drive-gear mounted on top of' the holder for operating the spindles as their drive-gears are brought into mesh therewith,a main driveshaft, gearing connecting said main shaft with said com mon gear, a vertically-disposed feed-operating shaft also geared at its upper end to said common gear, means for operatively connecting the lower end of the vertical shaft to said feed-gearing for driving the same automatically and means for operating the feed-gearing by hand; substantially as described.

7. The rotatable turret, a series of spindles mounted therein, each of the said spindles having a rack connected to it, and means for imparting rotary motion to any selected spindle, in combination with a movable box carrying a suitably-actuated pinion for engagement with the rack and a pin adapted to engage a hole in the turret when the box is given its operative position.

S. The rotatable turret, a series of spindles mounted therein, each of said spindles having a rack connected thereto, and means for imparting rotary motion to any selected spindle, in combination with a movable box carrying a pinion for engagement with the rack and also gearing connected to the said pinion, together' with means for manually operating the said gearing when the box is in its operative position.

9. The rotatable turret, a series of spindles mounted therein, each of the said spindles having a rack connected thereto, and means for imparting rotary motion to any selected spindle, in combination with a movable box carrying a pinion for engagement with thc rack and also a worm-gear geared to the pin- IOC) lIO

in its operative position, and means 698,242 p y 5 Y ion, together with a Worm mounted so as to engage with the Worm-gear when the box is for operating the Worm.

l0. The rotatable turret, a series of spindles mounted therein, each of the said spindles having a rack connected thereto, and means for imparting rotary motion to the selected spindle, in combination with a movable boX, a pinion carried thereby for engagement with the rack, and a worm-'gear also carried in the box and geared to the pinion, together with a pivoted bracket, and a suitably-actuated Worm mounted in said bracket whereby the Worm may be caused to engage the Wormgear when the movable box is in its operative position.

11. In a drilling-machine, the combination with a spindle, of means comprising a tubular Worm which may be'manually operated for feeding the spindle, together with a constantly-actuated shaft passing freely through the Worm and normally not connected thereto, but provided With a clutch whereby the manual feed of the spindle may be changed to an automatic feed.

l2. In a drilling-machine, the combination with a spindle audits feed-gearing, of a tubular Worm for operating said gearing, a handwheel connected to said worm and provided at one side with a clutch-surface, a constantlyactuated shaft passed through the Worm and provided with a clutch member' at one end and means for engaging the clutch member with that on the hand-wheel; substantially as described.

`I5. In a drilling-machine, the combination of a spindle, and means for imparting a rotary motion thereto, with gearing mounted in a movable box for imparting an automatic feed to the spindle, an actuating member normally engaging the said gearing when the box is in operative position, a pivoted bracket carryi-ngthe said member, and a catchfor maintaining the bracket in position, a rod connected to the catch, a spring pressing upon the rod, and a pivoted lever attached at the other end of the rod, together with a stop attached to the spindle whereby in the descent of the spindle the bracket and member carried thereby may be released from operative position.

In testimgny whereof I have signed my name to this specification in the presence of two subscribing Witnesses.

SAMUEL A. BAKER.

Witnesses:

ARTHUR D. BAKER, L. B. I-IURD.

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