US1278867A - Milling-machine fixture. - Google Patents

Description

J. F. DANEKE.

MILLING MACHINE FIXTURE. APPLICATION FILED rm. 14. 1916.

1,278,8fi7. Patented Sept. 17, 1918.

5 SHEETS-SHEET I.

J. F. DANEKE.

MILLING MACHINE FIXTURE.

. APPLICATION FILED FEB. 14.1916. 1,978,867.

Patelited Sept. 17,1918.

5 sumssum 2.

' I oi-nemsi Patented Sept. 17, 1918.

5 SHEETS-SHEET I. F. DANEKE.

MILLING MACHINE FIXTURE.

APPLICATION FILED FEB; 14. ms.

Inventor i F ii 86 m m w 4 mlil'lTliil'm IlillllllllllllllIIIlllllllllllllllllllllllllllllllIll J. F. DANEKE.

MILLING MACHINE FIX-TUBE.

APPLICATION FILED FEB. 14.19l6.

1,27,867. Patented Sept. 17,1918.

5 SHEETS-SHEET 4.

lllllll!l drawings wherein JOHN FRED DAN'EKE, OF TOPEKA, KANSAS.

MILLING-MACHINE FIXTURE.

aa'iaeee.

specification of Letters Patent. Patented Sept-17, 1918.

Application filed February 14, 1916. Serial No. 78,194..

To all whom it may concern Be it known that 1, JOHN FRED DANEKE, a citizen of the United States, and resident of Topeka, in the county ot-Shawnee and State-of Kansas, have-invented certain new and useful Improvements in Milling-Machine Fixtures, of which the following is a description, reference being had to the accompanying drawings, which form a part of my specification.

My invention relates more especially to fixtures for milling machines, and has for its object the provision of a fixture or milling cutter especially adapted for milling or fluting reamers, and the like, being more especially adapted for milling spiral flutes of similar angularity on a plurality of reamers, as'will be more fully understood from the following detailed description of the Figure 1 is a perspective view of my improved fixture or attachment applied to a well known type of milling machine; the unrelated portions whereof are not illustrated. I I 1 .Fig. 2 is an end View of my improved fixture, with the outer or compound gearing disclosed in Fig. 1 omitted, and a portion of the case or covering broken away to illustrate the arrangement of the gearing within.

Fig. 3' is a cross sectional View, taken on the line 33 of Fig. 2, looking in the direction of the arrows.

Fig. 4 is a vertical sectional view, taken on theline H of Fig. 3 looking in the direction of the arrows.

Fig. 5 is a side view of my improved fixture with the outer gearing omitted and the index plate and correlated parts broken away.

Fig. 6 is a vertical sectional view, taken on the line 66 of Fig. 2, looking in the direction of the arrows.

Fig. 7 illustrates the tail stock in elevation, which is located at the other end or side of the machine opposite to that disclosed in Fig. 1.

Fig. 8 is a side elevation or the tail stock.

Fig. 9 is a vertical sectional view, taken on the line 99 of Fig. 7, looking in the direction of the arrows.

Fig. 10-is a detail view, with a portion shown in section, of one of the tapered sleeves for securing the centers in adjusted position,

As my invention or improved fixture is adapted to be applied to a well known type of milling machine at present in use, a detailed description of the milling machine proper need not be entered into, except in so far as such portions of the milling machine have immediate relation with my invention.

slidably mounted table or bed 16 which is adapted to travel in a horizontal manner 1 beneath the frame 17 from which is suspended rotative shaft 18 to which the cutters 19, 19 are keyed or otherwise secured so as to rotate with the shaft.18; the latter being driven in the usual manner by mechanism not disclosed in the drawings.

The bed or table '16 is made to travel laterally through the'action of worm gearin secured to the main drive shaft 20 whicfi extends lengthwise of the table or bed 16; the gearing, however, being of the usual construction, is therefore not disclosed in the drawings. Furthermore, the mechanism whereby the turn-table 15 and with it bed 16 are swung into the desired angle, relative to cutter shaft 18 and therefore cutters 19, being also of the usual well-known construction at present in use, is also not shown and therefore not described. i

The improved fixture comprises the head casting 21 which is cored to receive the shafts and spindles hereinafter to be described, and the casting 21 is suitably mounted on or bolted to one end of the bed or table 16 so as to travel therewith.

The end of the table and the fixture, as disclosed in Fig. 1, are shown provided with compound gearing which comprises the ear 22 secured to the main drive shaft 20. ear 22 meshes with the gear 23, which latter meshes with the large gear 24. This gear 24 has secured to it, or to the same shaft, a spur gear 25, which latter meshes ,with

the large gear 26 secured on the outer end of shaft 27. Shaft 27 has bearing in the cored extension 28, which may be formed integral with the casting 21 and shown as extending beyond the end' of casting 21, see Figs. 1, 3 and 5.

The shaft 27 is shownheld against longitudinal movement by means of the bolt 29 passing through extension 28 and extend ing into the circumferential groove 30 formed in shaft 27, as disclosed in Fig. 3.

The inner end, of shaft 27 is provided with miter gear31which. meshes with miter gear 32 secured to index-plate 33, by means of the bolts 34; the gear 32 being preferably provided with a hub-portion extending through plate 33 and fitting against a plate or washer 35, so as to have suitable bearing. The miter gear 32 and index-plate 33 are mounted on the stationary bearing 36 projecting from what is known as the indexhead.

worm 42, shown in full lines in Fig. 4, and

in dotted lines in Fig 3.

The worm-shaft 41 is mounted in'the bearing-member 43, which, at the inner end is pivoted at 44 to the casting 21, see Fig. 4, so as to permit of vertical movement or adjustment of the bearing 43 and therefore of worm-shaft 41. The outer end of the bearing 43 is held in its adjusted vertical position 'by means of the set screws 45 and 46; the set screw or bolt 45 screws into a suitable boss formed on bearing 43, and bolt 45 is adapted to have its head engaged by the spring-controlled plunger 47 mounted in a suitable hole or opening in the casting 21, see Fig. 4. The plunger 47 is maintained outwardly by means of the coil spring 48, which permits the plunger to be depressed or moved out of holding contact with the bolt or screw 45. .The'plunger 47 is locked in its outward position and held against accidental displacement, through vibration and so forth, by means of the set screw 49 which takes through a tapped hole in casting 21 and engages in a groove or socket formed in the upper side of plunger 47, as will be seen in Fig. 4.

It is evident from the construction just described, that the screwing, in or out, of bolt or screw 45 will decrease or increase the length of the bolt between bearing-member 43 and plunger 47. As is evident from the construction when plunger 47 is brought into supporting engagement with the head of bolt 45, as shown in Fig. 4, the outer end of bearing member 43, and therefore wormshaft 41, will be moved either above or below the plane of the pivot-point 44 of bearing member 43, depending upon Whether the bolt 45 has been screwed farther downward into the boss on bearing-member 43 or has been turned in unscrewing direction. In order to permit such action of bolt 45, it will first be necessary to remove the nut or washer 50 on theouter end of bolt 46, to permit upward movement of bearing member 43. In order to maintain the bear-' ing 43 in proper alinement laterally, I provide the cap screw 51, see Fig. 3.

Worm 42 meshes with worm-wheel 52 which is keyed or otherwise secured to the spindle 53. Spindle 53 is rotatably mounted in the cored opening in casting 21, see Figs. 3 and 4, so that rotation of worm-shaft 41 will cause spindle 53 to be rotated by means of the worm gearing 42 and 52.

The outer end of spindle 53 is provided with gear 54 which meshes with the idlers 55' and 56 arranged on opposite sides thereof, as shown in Fig. 2. Idler 55 meshes with. gear 57 which keyed or otherwise secured tothe spindle 58, while idler 56 meshes with gear 59 keyed or otherwise secured to the spindle 66, so that rotation of spindle 53 will impart similar rotation or movement to spindles 58 and 60.

The gearing just described is incased by. means of the cover-plate 61, as more clearly shown in Fig. 2; and the ends of the three spindles 53, 58 and 60 are preferably slightly reduced and extended beyond the gearing and through openings in the cover-plate 61; the reduced or outer ends of the various spindles being preferably externally threaded to. receive the nut 62 and cap-nuts 63 and 64, respectively. The nuts 63 and 64 are in the nature of cap-nuts, as shown in Figs. 3 and 6, and provided with central openings adapted for the passage of the screw- shafts 65 and 66, respectively, the outer ends whereof are keyed as shown at 67 in Fig. 3, to the handles 68 and 69, respectively; the handles being held or locked in place by means of nuts 70.

The screw- shafts 65 and 66 are similar in construction and are each provided with aflange', or shoulder 71, see Figs. 3 and 6,

which provide a bearing against the caps or nuts 63 and 64. The spindles 58 and 60 are bored from end to end, as shown at 72, to the right in Fig. 3, and also in the sectional view, Fig. 6, and thus permit passage of the screw- shafts 65 and 66; the inner ends whereof, beyond the flange or shoulder 71, are screw-threaded, as shown in Figs. 3 and 6. The threaded ends of the shafts 65 and 66 screw into tapped. openings in the inrer ends of the centers 73 and 74, respectively,

. by the flange or shoulder 71 on the screwshafts taking against the inner side of-the cap-nuts 63 and 64, respectively.

The centers 73 and 74, mounted in the spindles 58 and '60, are maintained against rotative movement relative to their spindles by the cap-screws 75, see Fig. 3, which extend into slot-ways formed in the centers and permit longitudinal movement of th centers when desired. The bores or cored openings in the spindles 53, 58 and 60 are tapered from the outer ends inward; and the shanks of centers 73 and 74 are' of the same diameter throughout so as to adapt the tapered sleeves 76, to be inserted in the. spindles 58 and 60, see Figs. 3 and 6. The sleeves 76 are preferably split, as shown in Fig. 10, so as to permit them to contract and .be inserted in the tapered openings of the spindles -to firmly grasp the centers Y73 and 74 and. maintain the outer ends ofthe centers in proper relative position and induce the centers 73. and 74 t0 rotate with their respective spindles 58 and 60.

The outer ends of the spindles 58 and 60 are shown threaded to receive the cap-nuts 7 7 ,7 7 which permit the passage of the spindles, and are arranged to engage with the outer ends of the split tapered sleeves 76 so ,as to force and maintain the latter in proper wedged position.

In order to adjust the centers 73 and .74 of spindles 58- and 60, it is necessary to loosen the lockor cap-nuts 77, and then turn the handles 68 and 69, respectively, in a direction that will bringthe centers '73 and 74 outward, which, in turn, will loosen the tapered sleeves 76. The centers 73 and 74 may then be adjusted longitudinally of the spindles by a proper rotation of the handles 68 and 69, whereby the centers are either drawn farther into or forced farther outward from the respective spindles, as desired.

The. construction shown and described permits of adjustment to any angularity of the table or bed and parts mounted thereon, which will permit either a left or right-hand spiral or flute being cut. For example, with center 74 moved-outwardly and center 73 drawn inwardly, as shown in Fig. 3, the table and fixture has been set to mill a lefthand spiral or flute. When the table has been swung to cut a right-hand spiral or flute, center 73 will then be moved outward and center 74 drawn inward; the distance of. longitudinal movement, given center 73 and 74, being determined by the spiral or angle of lead of the spiral to be cut, and therefore by the angularity of the bed or table 16, and the fixture carried thereby, to the cutter-shaft 18.

As soon as the centers 73 and 74 have been adjusted, the tapered sleeves 76 are again forced into the tapered openings in the respective spindles, and the lock or cap-nuts 77 screwed firmly into place so that the sleeves "will be forced into firm gripping relation with the spindles 58 and 60.

The center spindle 53 is also shown provided with a center 78; and as this center need not be adjusted longitudinally of the spindle 58, it is shown provided with the tapered shank 78. The ends of the various centers 73, 74 and 78 engage in central points or bores in the stock or reamers 79, as shown in Fig. 3. The ends ofthe stock or reamers 79 are squared and are adapted to be engaged by the set-screws 80 mounted in the dogs 81, which are preferably of'the U-shape in cross-section, 'as shown in Fig.

3; the dogs 81 being firmlysecured adjacent to the outer ends of the centers by-mea'ns of the set screw or bolt 82 or in any other suitable manner, so that the dogs will be made to rotate with their respective centers,

and by reason of the set-screws or bolts 80,

compel the stock or reamers 79 to also rotate therewith about theirlongitudinal axes.

In order to give rotation to the spindles and their respective centers, independently of the worm-shaft and intermediate gearing hereinbefore described, in other words, for the purpose of setting the spindles with their centers, I show the casting 21 provided with a cored opening in the upper part thereof to receive the shaft 83, the outer end whereof is preferably squared to re- 1 ceive a suitable wrench or crank, see Fig. 6. The shaft 83 is provided with a gear 84 which meshes with the gear 59 secured to the spindle 60. It is evident from the construction shown, that rotation of the shaft 83 will cause spindle 60 to be rotated by.

thereon a stop-block 86, adapted to engage in a slot arranged on the periphery of diskmember 33. The block' or member 85 is provided with 'an elongated slot 87 see Fig. 3, through which the thumb-screw 87 extends and whereby the block or engaging member 86 is firmly clamped in its adjusted position. In Fig. 3, the block 86 is shown out to mill straight flutes in the reamers instead of the spiral flutes shown in Fig. 1. When such an operation is de'sired,the stopmember 86 is moved into the groove formed 4 on the periphery of index-member 33 so as to hold the latter against rotation, and therefore also hold arm 39 which passes through the end of worm-shaft 41, as shown in Figs. 3 and 4; at the same time gear 26 is removed from shaft 27, so that no rotation will be imparted to the respective spindles 53, 58 and 60 by means of the worm-shaft 4:1. It is apparent, therefore, that with the spindles locked against rotation, the stock or reamers will also be held against movement about their longitudinal axes, and straight flutes will be cut in the stock or reamers through the usual longitudinal travel of the table or bed 16, which, of course, has been set at the right angularity to the cutter-shaft 18,

The opposite ends of the reamers, namely the ends opposite to those shown in Figs. 1 and 3, are mounted on thecentersof the tailstock 88, disclosed in Fig. 7. Tail-stock 88 is mounted on the base-block 88 which is suitably bolted on the opposite end of the table or bed plate 16. The tail-stock 88,

like the opposite end of my improved mill ing machine fixture, is shown adapted to center three reamers and maintain the same in proper horizontal alinement. I disclose the tail-stock 88 as being vertically adjustable, and therefore the base-block 88 is shown provided with an incline surface 89, see Figs. 8 and 9, which receive the oppositely inclinedor beveled surface of the tailstock 88. The incline surface 89 of the block 88 is preferably shown provided with one or more upwardly presented lugs 90, see Figs. 7 and 8, adapted to extend into the grooves 91 formed in the bottom'surface of the tail-stock 88, as can be seen in Fig; 7, whereby the proper relative position of the stock to the base-block will be maintained and held against lateral displacement,

The casting or tail-stock 88 is provided with a suitable number of center-blocks or members 92, the immediate points or centers thereof engaging the ends ofv the reamers.

The center-blocks or members 92 are mounted in suitable grooves arranged in the upper surface of the tail-stock 88, so as to permit of a sliding movement; the centerblocks or members 92 being each provided with a dependin portion or extension 93, shown in dotted lines in Figs. 8 and 9, fitting into the cored-out portion of the tailstock 88. The extensions 93 are provided with tapped openings adapted to receive the screw-rods 94, which extend through suitable openings in the sides of the tail-stock description just given, that rotation of the rods 94 in one direction will cause the centers 92 to travel horizontally outward and toward the ends of the reamers, while rotation of the rods in the opposite direction will withdraw the centers 92 from the ends of the reamers, orrather toward the tail-stock 88; the centers 92 being adjusted laterally as adjustment of the head centers in the respective spindles at the opposite end of the table 16.

The casting or tail-stock 88 is also provided with one or more vertically disposed openings 95, see Fig. 9, adapted for the passage of the vertically disposed screw-rods 96, see Figs. 7 and 9. The bolts 96 are provided with suitable washers at the upper ends adaptedto overlap the elongated slots 95, while the lower ends of the bolts 96 take into tapped openings in the base-block 88, as shown in Figs. 7 and 9. As isevident from this construction, after the bolts 96 have been unscrewed sufficiently from clamping relation with the tail-stock casting 88, the latter may be moved lengthwise of the incline 89 until the centers 92 have been brought into the proper horizontal plane, whereby the reamers will be held in proper alined relation with the cutters 19; movement of the tail-stock 88 being permitted by reason of the elongated slots or openings 95. As soon as the stock has been brought to proper horizontal position, the bolts 96 are again screwed down so as to firmly clamp the stock or block 88 in its adjusted position onthe incline surface of the base-block 88".

As further means for maintaining the tailstock or block 88 in its adjusted position, I show the base-block 88 provided with the outwardly disposed lugs or lobes 97 on the sides thereof, see Figs. 7 and 8, from which extend the screw-rods 98. The rods 98 extend through the elongated slots 99 in the lugs 100, which are formed integral with the sides of the tail-stock or block 88, see Figs. 7 and 8. After the tail-stock 88 has been adjusted, as previously described, the nuts 101, at the ends of the screw-rods 98, are screwed up on the rods so as to firmly engage the lugs 100 of the tail-stock member 88, and thus prevent any tendency of the tail-stock .85 described to compensate for 'any in or out 88 to move downwardly on the inclination 89.

In Fig. 1, I show mechanism for manually returning the bed'or table 16 to normal position, comprising the crank 102, the clutch- 103 whereby the gear 104 may be rotated;

. gear 104 meshing with the idler 105 which,

, drawings) of the usual construction.

The upper surface of the casting 21 is 4 provided with a suitable channel 106, see

Fig. 4, for the reception of a proper lubricant; the channel 106 being provided with a cover-plate 107 removably held in place. The casting 21 is shown provided with a duct or tube 108 leading downwardly to a point immediately above the bearing member 43 of worm-shaft 41, at which point the bearing member 43 is provided with a recess which surrounds the opening 109, thus per-. mitting the lubricant to flow from the channel 106, through duct 108 and the opening 109 into contact with the worm-shaft 41.

After a flute or out has been made the full length of the reamers, and the table or bed 16 has been returned to normal position, the work is indexed, or, in other words, the

Y reamers are given the necessary rotation I hub-portion of miter gear 32, see Figs. 1, 3

about their longitudinal axes, a distance sufficient for the next flute to be cut. This is accomplished by removing index-pin 37 from the hole in index-plate 33, in order that thelarm 39 which passes through end of shaft 41 may be free and enable the worm-shaft 41 to be rotated; the arm 39 acting in the nature of a crank whereby the worm-shaft 41 can be rotated to the desired degree or distance in order to present the desired uncut surface of the reamer to the action of the cutters during the next travel and movement of the bed-plate and the fixture carried thereby. As soon as the reamers have been rotated or moved through the proper angular distance, the index pin 37 is permitted to engage in the ad acent almed or proper hole in index-plate 33.

In order to assist in determining or indicatin the proper hole into which the indexpin 3 is to be inserted, after a suflicient rotation of worm-shaft 41 has been made, I providev the index-plate with'the sector arms 110 which extend from the annular bodyportions shown mounted on the extended and 4; the sector arms being held in pro er frictional engagement with the index-p ate 33 and with each other by means of a' suitable washer, as shown at 104 in Fig. 4, mounted on the end of worm-shaft 41. I

I have shown and described an exem lification of my invention more especlally adapted to cut a plurality of reamers with spiral flutes of the desired angularity; having shown and described what I believe to be the simplest and best form of myv -inven-- tion;-the same may, however, be altered in certain respects withoiit, departing from the spirit of my invention, and I do not wish to be understood therefore as limiting myself to the exact construction shown and described except as defined by the appended claims.

What I claim is 1. A machine of the class described, comprising cutting means, a feed-table arranged to travel longitudinally beneath said means and adapted to be moved into a position at an angle to its line of travel, rotatably mounted means for holding the material to be operated upon, a portionof said means being adjustable in a direction lengthwise of the feed=table, means whereby said holding means may be rotated at a predetermined speed proportionate to the speed of the longitudinal travel of the feed-table, and means whereby said holding means may be given movement independent of the rotary movement imparted thereto by said third mentioned means.

- 2. A machine of the class described, comprising cutting means, a feed-table adapted to travel longitudinally and arranged to be moved into a position at an angle to. its line of travel, a plurality of spindles rotatably mounted on said feed-table, with one of said spindles located at the longitudinal center line. of the table, while the other spindles are disposed on each side of the centrally located spindle, means whereby said spindles will be rotated in unison at a predetermined speed proportionate to the speed of the longitudinal travel of the feedtable, means carried by the spindles for holding the material to be operated upon, and means whereby said holding means of the spindles on each side of the center spindle may be independently adjustedin relation to said spindles.

3. A machine of, the class described, comprising cuttin means, a feed-table adapted to travel longltudinally and arranged to be moved into a position at an angle to its line of travel, a plurality of spindles rotatably mounted on said feed-table, with one 01 said spindles located at the longitudinal center line of the table, while the other spindles are disposed on each'side of the centrally located spindle, means whereby said spindles will be rotated at a predetermined speed proportionate to the speedof the longitudinal travel of the feed-table,

side of the center spindle may be independently adjusted lengthwise of the spindles.

4. A machine of the class described, comprising cutting means, a feed-table arrangedto. travel longitudinally and adapted to be moved into a position at. an angle to its line of travel, a plurality of spindles rotatably mounted on said feed-table, one of said spindles being located substantially at the longitudinal center line of the feed-table while the other spindles are arranged on opposite sides of said centrally located spindle, means carried by the spindles for holding the material to be operated upon, and

means whereby the holding means of the spindles arranged on opposite sides of the longitudinal center line may be adjusted lengthwise of the spindles.

5. In a machine of the class described, a feed-table arranged to travel longitudinally and adapted to move into a position at an angle to its line of travel, a plurality of spindles rotatably mounted on said feedtable, one of said spindles being located substantially at the longitudinal center line of the feed-table while the other spindles arearranged on opposite sides of said centrally located spindle, a worm-gear mounted on one of said spindles, a worm-shaft'located beneath and transversely of the spindles and adapted to mesh with said worm-gear and impart rotation thereto, a bearing member in which said worm-shaft is rotatably mounted; -said member being pivoted at one end; and means engaging with the movable end of the bearing member whereby said member may be moved on its pivot and the worm-shaft moved into and out of meshing relation with the worm-gear on the spindle. 6. In a machine of the class described, a feed-table adapted to travel longitudinally, a plurality of rotatably mounted spindles,

, one of which is mounted at the longitudinal center line of the table while the other spindles are located on each side of the center spindle, the center spindle being provided with a worm-gear, a worm-shaft disposed beneath and transversely of the spindles and adapted to mesh with the worm gear on the center spindle and impart rotation thereto, an elongated bearing member, pivoted at one end, in which said worm-shaft is rotatably mounted, means whereby said bearing member may be vertically adjusted and the.

end in said casting and transversely of the spindles, a worm-shaft rotatably mounted in said bearing member, gearing intermediate of the Worm-shaft and the respective spindles whereby the latter are rotated in unison through rotation of the worm-shaft, and adjustable means whereby said hearing member may be moved about its pivotal point and the worm-shaft moved into br out of operative relation with its corre lated gearing.

8. A machine of the class described, comprising a feed-table, arranged to travel longitudinally and adapted to be moved into a position at an angle to its line of travel, a plurality of spindles rotatably mounted on the feed-table, one of, said spindles being located substantially at the longitudinal center line of the feed-table while the other spindles are arranged on opposite sides of erated on, means whereby the last mentioned means of the spindles arranged on opposite sides or" the longitudinal center line may be adjusted lengthwise of said spindles,

a worm-shaft for imparting rotation to said spindles, and means intermediate of the worm-shaft and the feed-table driving mechanism whereby power is imparted to said worm-shaft, said means being adapted to lock the worm-shaft against rotation and also impart independent rotation thereto.

9. In a machine of the class described, a header casting, a plurality of spindles rotatably mounted in said head or casting, said spindles being provided with tapered openings extending lengthwise therethrough, work-holding means mounted in said openings, means arranged at the outer ends of said holding means whereby the latter are maintained centrally in the tapered openings of thespindles, and means adjustably connected with the inner ends of said holding means whereby the latter may be moved lengthwise of the spindles.

10. In a machine of the class described, a head or casting, a spindle'rotatably mounted therein, the spindle being provided with a tapered opening extending lengthwise therethrough, a work-holding member mounted in said opening of the spindle, means whereby the holding member will be forced to rotate with the spindle and movement of the holding member lengthwise of thespindle permitted, a tapered member surrounding the holding member and extending into the tapered opening of the spindle whereby the holding member is maintained in proper central position, and means for holding said'tapered member in position.

11. In a machine of the class described, a rotatably mounted spindle provided with a tapered opening extending lengthwise therethrough,-the outer ends of the spindle being threaded, a work-holding member mounted in said tapered opening, a tapered sleeve surrounding the holding member and extending into the tapered opening of the spindles whereby the holding member is held in a central position, a cap-nut adapted to screw onto the threaded end of the spindle for forcing and maintaining said tapered sleeve in position, a cap-nut adapted to be screwed onto the opposite endof the spindle, a screw-rod extending through .said last mentioned cap-nut and having threaded engagement with the inner end of the holding member whereby the latter may be moved lengthwise of the spindle.

12. A machine of theclass described, comprising a feed-table arranged to. travel longitudinally and adapted to be moved into a position at an-angle to its line of travel, a plurality of rotatably mounted spindles on said feed-table, work-holding means carried by said spindles, the holding means of .the spindles arranged on opposite sides of the longitudinal center line ofthe feed-table being adjustable lengthwise of the spindles whereby said holding means may be adjusted relative to the angul'arity of'the' feedtable, a worm-shaft adapted to impart rotary movement to said spindles, gearing-intermediate of the feed-table operating mechanism and said worm-shaft for imparting rotation to the latter, and indexing means intermediate of said intermediate gearing and the\worm-sha ft whereby power from said intermediate gearing to the worm-shaft is transmitted and positioning of the material operated upon determined.

13. A machine of the class described, comprising a feed-table arranged to travel longitudinally and adapted to have adjustment so as to be'arranged at anangle to its line of travel, a plurality of rotatably mounted spindles on said feed-table each of which is provided with a longitudinal opening extending therethrough, work-holding means removably mounted in said openings, .rotative means secured to the inner ends of some of said work-holding means whereby the latter may be adjusted lengthwise oftheir respective spindles without imparting rotation thereto, the intermediate spindle being rovided with a worm-gear, an elongated earing sleeve pivoted at its inner end and adapted to swing vertically, adjustable means secured to the outer end of said sleeve whereby the latter is controlled, a wormshaft mounted in said sleeve and adapted to mesh with the worm-gear on said intermediate spindle for imparting rotation to the latter, gearing intermediate of the feed-table operating mechanism and said worm-shaft whereby the latter is rotated, gearing intermediate of the intermediate spindle and the spindles located on opposite sides thereof whereby rotation of the latter is obtained through rotation of the former, and means connected with the worm-shaft whereby the latter may be given rotation independent of that imparted thereto by said gearing.

JOHN FRED DANEKE.

Images