US1305473A - Automatic lathe - Google Patents

Description

H. H. LAWRENCE.

AUTOMATIC LATHE.

APPLICATION man JULY H. 19:1

Patented June 3, 1919.

4 SHEETS-SHEET I.

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H. H. LAWRENCE.

AUTOMATIC LATHE.

APPLICATION man JULY 14, 1911.

Patented June 3,1919;

4 SHEETs-SHEET 2.

H. H. LAWRENCE AUTOMATIC LATHE.

APPLICATION FILED JULY 14, um.

1,305,473. Patented June 3, 19l9.

4 SHEETSSHEET a.

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H. H. LAWRENCE. AUTOMATIC LATHE.

APPLICATION FILEAD JULY 14. 1917.

Patented J '11110 3, 1919.

4 SHEETS-SHEET 4.

HOMER HIN'GSTON LAWRENCE, OF ST. ALBANS, VERMONT.

AUTOMATIC LATHE.

Specification of Letters Patent.

Patented June 3, 1919.

Application filed July 14, 1917. Serial N 0. 180,551.

To all whom it may concern Be it known that I, HOMER H. LAWRENCE, a citizen of the United States, and a resident of St. Albans, county of Franklin, State of Vermont, have invented certain new and useful Improvements in Automatic Lathes, of which the following is a full and clear specification.

This invention relates to improvements in automatic lathes and has for its objects to provide improved means for delivering the work automatically to the lathe chuck and for automatically presenting. aplurality of tools in succession to the work, and finally removing the work from the chuck and delivering it to one side of the machine.

This improved lathe is especially adapted for use in finishing ordnance shells and more particularly the noses. thereof, whose outer surface requires shaping and smoothing and whose apertured end requires reaming and threading, but it will be understood that certain of the combinations of parts claimed are capable of use in other metal as well as wood-working machines.

These and other objects hereinafter set forth are attained by the means illustrated in the accompanying drawings, in which Figure 1 is a. plan View of the device without the magazine:

Fig. 2 is a side elevation of the same including the magazine;

Fig. 3 is an inner face view of the toolcylinder back support;

Fig. 4 is a view in elevation of one side of the delivering and discharging magazine;

Fig. 5 is a side elevation of the master control wheel showing the cam grooves diagrammatically thereon;

Fig. 6 is a side View, partially in section, showing the end of the thrust-bar and its attachments Fig. 7 is a cross-section on the line 77 of Fig. 6; V

Fig. 8 is a detail view showing the limit stop for the cutting tool;

Fig. 9 is a sectional view showing the lathe chuck and air-controlled means for operating its jaws; and

Fig. 10 is a detail sectional View on the line 1010 of Fig. 9.

Fig. 11 is a detail sectional View throughthe upper end of the magazine showing the operation of the stop fingers.

Similar reference numerals in all of the figures of the drawings designate like parts.

Referring to the drawings, the side-rails 12 of the lathe have mounted to slide longitudinallythereon a carriage '13, the same extending across the machine and being provided with upstanding sides 14: which form a support for the journals 15 of a controlcylinderlfi. 1

Also mounted onthe carriage 13 is atoolcylinder 17 which is adapted to slide transversely of the, lathe on curved ways 18 formed on the carriage, and this sliding movement back and forth is transmitted by a cam-groove 19 formed around the surface of the control-cylinder 16. and in which travels a ball-bearing cam 20 projecting from a part of the tool-cylinder 17.

Cylinder 16 is rotated continuously in one direction from' the main shaft 21 through the gear 22, worm 23 and bevel-gear 24 on a shaft 25 carried by the carriage 13, which also carries a gear 26 that meshes with both the gear 24 and a gear 27, the latter being a cylindrical gear suitably secured to shaft 21 and gear 26 is adapted to slide thereon.

Mounted on the side-rails 12 is a feed magazine 29 from which the work is fed to a delivering mechanism 30', which in turn carries the work to and from the rotatable head 31 of the chuck. The delivering mech anism comprises a work-carrier formed of two parallel arms 32 which are connected at their rear ends to a stem 33 that is supported and adapted to slide in a groove 31 formed in a rack-bar .35, which is suitably mounted to slide in the frame of the lathe. Secured to the top side of said rack-bar 35 is a work thrusting bar 36 which is provided at'its free end with a spring-buffer mechanism comprising a buffer-plate 37 mounted to freely rotate on bar 36 and a; normally expanded coil-spring 38 which bears against a stop 39 fixed to the bar 36. Plate 37 is provided with backwardly-extending arms 40 which are provided with inwardly-bent ends to form stops to engage the stop 39 to limit the-forward movement of the buffer plate 37. Rack-bar 35 is reciprocated from a master cam-wheel 41 through a gear-wheel 42, pinion 43, and an additionalrack-bar 4-1 which is provided at its lower'end with a camroller 45 adapted to travel in acam-groove in one face of the master-wheel tl, and

guided in a direct path by engaging in a groove %6 in a guide-plate 47.

The feed magazine projects inwardly from its supporting-rails and is provided with an inwardly-extending and downwardlyinclined feed chute 48, a downwardlycurved chute e9 at the lower end of chute 48 to reverse the direction of travel of the work, and a discharge chute 50 which is inclined downwardly and outwardly and Whose upper end is spaced from the lower end of the curved chute 49 to form a gap in which are adapted to normally lie the spaced arms 32 of the work-carrier. The work, or the shell forgings herein shown, is fed into the mouth 51 and by gravitation they roll downwardly to the curved chute 4L9, and are then deposited upon the workcarrier, and after they have been delivered to the chuck and finished, they are returned to normal position in the gap and caused to roll down the discharge chute. Suitable mechanism is provided for controlling the movement of the work through the magazine, so that the forgings can be fed one at a time to the work-carrier. This mechanism comprises a vertically-reciprocating bar 52 located to one side of the magazine and which is suitably guided in brackets and is provided with horizontally-extending arms 54 and Y55, each of which is provided with stop fin ers 56 and 57, respectively, and another arm 58 provided with a combined lifter and stop 59. Arm is positioned at the top of the bar 52 and its fingers 56 project into the chute 4S, and the lifter 59 is positioned beneath the gap between the ends of the chutes 4:9 and 50, and arm is located intermediate the arm 5%. and the lifter 59 so that its fingers will act as stops for the work alternately above and below the bottom of the chute 48. Bar 52 is reciprocated' up and down by a camgroove in the master-wheel ll, in which travels a cai'n-roller 60 secured to the lower end of the bar, said lower end of the bar being guided in a direct line by a vertical groove 61 formed in the guide-plate 47. As thus constructed, a plurality of shell forgings can be'placed in the chute %8, as shown by dotted lines in Fig. i of the drawings, with the lower forging resting against the fingers 56. As the masterewhe-el rotates, bar

is lifted, thereby releasing the lowermost forging, so that it can roll downwardly, the remaining forgings being held by the fingers 57. The lowermost forging passes to the curved chute i9 and is stopped by the lifter 59 which has been lifted into its path. At this time, the bar 52 is lowered by the master-wheel, thus slowly withdrawing the lifter and allowing the lowermost forging to settle upon the arms 32 of the work-carrier. At the same time, the fingers 57 are lowered to release the uppermost forgings, which roll down into en'- gagement with the fingers 56 which have also been-lowered. After the work has been returned from the chuck, an upward movement of the bar 52 will force the finished shell from the work-carrier into the chute 50, when it will discharge to one side of the machine. It will be seen that as fast as a finished shell is discharged, the forgings are advanced step by step to the work-carrier.

When a forging is deposited into the chuck-head, the four independent sections 62 thereof are closed thereon to firmly hold the forging so that it will rotate with the chuck-head. The closing and opening of the sections is accomplished by an aircontrolmeans operated by the cams 63 and 6 fixed upon the periphery of the masterwheel 41. These cams 63 and 64 alternately engage a crank-arm 65 of a suitable aircontrol valve mounted to rotate in a casing 66 secured in position to a stationary part of the lathe and adjacent to the masterwheel. lVhen the crank-arm 65 is operated in one direction by inclined cam 64-, communication is established between the air valve and an air cylinder 67 to cause the air pressure to force a piston 68 to the dotted-line position shown in Fig. 9. The stem 69 of the piston has its free end formed with dovetail inclined grooves 70, in which are seated lugs 71 formed on each of the chuckhead sections. Thus it will be seen that when the piston 68 is forced to the left or to the clotted-line position shown in Fig. 9, the inclined grooves will also be drawn to the left and consequently the lugs 71 and chuck-head sections will be drawn closer together to clamp the forging in the head. At the proper time, the other inclined cam 63 on the master-wheel will operate the crank-arm 65 in an opposite direction to direct the air 'i'ressure to the opposite side of the piston 68 and cause the chuck-head sections to separate and release the clamping action on the forging. Piston-stem 69 is mounted to slide in a sleeve 72 which is mounted to rotate in suitable bearings and is provided with the usual cone-pulley 73. One end of the sleeveis formed with a head'74: having an annular groove '75 in which one wall of the fixed casing is seated. The opposite end of the sleeve is formed with radial projections 76 which are adapted to engage in guide-slots 77 formed in'the rear ends of the chuck-head sections. As thus constructed, the chuck-head sections, sleeve 72, and the piston and its stem all rotate together, and the stem has an independent sliding movement to close and open the chuck-head sections.

While a forging is being deposited in the chuck-head, the carriage 18 is advancing by a cam-groove 78 in the master-wheel ii, the

same being engaged by a cam-roller 79 mounted on the lower end of an arm 80 fixed to the under side of the carriage. The cam-roller 79* is guided in a direct line by its engagement with a slot 81 formed in a fixed guide-plate 82. The initial advance movement of the carriage places the tool 83 in position for cutting the exterior of the I forging and, as the carriage recedes, the tool 83 is caused to follow the shape of the nose by the transverse movement of the toolcylinder 17, due to the shape of the groove 19 in the control-cylinder 16. After the tool 83 reaches its limit of cutting, the toolcylinder is moved farther transversely to position the tool 84, which is then advanced to enter the opening in the forging to percylinder in position upon its ways 18. The

other collar 87 has projecting from it a dovetailed lug upon which are mounted ballbearing rollers 20 and 91, the latter engaging in a straight groove 92 formed in a back-plate 93. This prevents the collar 87 from turning and retains the roller 20 in proper position within the groove 19 and cylinder 17 in constant contact with backplate 93. Thus it will be seen that the collars 86 and 87 are both prevented from turning, while the cylinder proper upon which they are mounted is free to rotate. The'cylinder proper is caused to partially rotate to bring the tools 94: and 95 down to a working plane, so that, as the tool cylinder is returning to normal position, after the tool 85 has finished cutting, tools 95 and 94 can be presented to the work in their regular order. The partial rotation of the toolcylinder is accomplished by a ball 96 seated to turn in a socket 97 and adapted to engage a groove 98 in the back-plate.- This groove 98 is endless, so that, when the toolcylinder reaches its end of travel in one direction, the ball will follow the groove and travel in a difierent plane upon the return movement of the cylinder. In other Words, as the tool-cylinder moves in a direction from its normal position, the ball will travel along the lower portion of the groove,

and upon the return movement of the cylinder, the ball will travel in the upper portion of the groove. A spring latch 99 is fixed to p the collar 87 and is adapted to alternately engage in depressions 100 in the cylinder to retain the same in adjusted position relative to the collars, that is, against accidental displacement.

Tool 94 is an expansible screw-threading tap for forming threads in the opening of the forging and to be withdrawn therefrom without following the threads. Normally, the thread-cutting sections of the tap are contracted, but they are expanded to cutting position by a fixed cam-arm 101 engaging a yoke 102 pivoted on the tool and connected interiorly to expand the dies. The interior construction of the expansible tap is not shown, as no specific claim is made thereon in this application. 7,

After the forging has been operated upon by all of the tools in successive order, the forging is returned to the magazine by the work-carrier 30 and then discharged. To remove the shell from the chuck-head, it is necessary to provide a release mechanism, and it has been found to be preferable to provide means for engaging behindthe threads in the work to pull the same from the chuck. To accomplish this, a threadengaging angle-lever 103 is pivoted on the end of the thrustbar 36 and the same is operated by a lever 104, pivoted at105 .to the thrust-bar, and is provided with a portion 106 which extends forwardly and longitudinally in the hollow end of the thrust-bar and is provided with an angular extension 107 which engages the slotted leg 10 8 of the angle-lever 103. Lever 104 projects through an aperture 109 in the wall of the thrust-bar and its outer end is pivotally connected to the upper end of a cam-bar 110 which is suitably mounted for longitudinal movement and is provided at its lower end with a V-shaped cam 111'. Bar 110 is moved in opposite directions by cams 112 and 113 fixed on one of the arms 32 of the workcarrier.

When the work-carrier advances to receive the work after the cutting has been accomplished so as to return it to the 1nagazine to be discharged, the thrust-bar is advanced farther forwardly by its control groove in the master-wheel than when it deposited the work on the chuck-head. This additional forward movement causes the end of the thrust-bar to enter the opening far-.

ther in the end of the work and causes one leg of the cam 111 to engage the cam. 112

which has beenstopped in its forward move,

ment by its carrying arm 32 being stopped by contact with chuck-bearing 114. This will operate the work-engaging lever 103 and cause it to engage beyond the threads on the work, as shown in Fig. 6 of the drawing. Thus, as the thrust-bar is caused to retreat, it will pull the work with it onto the Work-carrying arms 32; then at a certain period in its retreating movement, after the work is deposited on the arms 32, cam 113 will engage cam 111 and thereby release lever 103 from the threads on the work. ,At the time the work is to be removed from the chuck-head, the air-control mechanism will be operated by the master-wheel cam 63 to unclutch the chuck-head.

Cutting tool 83 is provided with a pivoted gage arm 115, shown in detail in Fig. 8. This gage arm is provided toregulate or taper the depth of the cut to be made ust at the start and normally lies the dottedline position shown, and is elevated against the work by a cam 116 as the cutter 117 approaches the work. V p

The master-wheel 41 is rotated continuously in one direction by the wor'in'11 8 on the shaft 21 which meshes with a pinion 119 on the end of the master-wheel shaft'120Q The successive operations of the machine are as follows:

The forgings are placed on the magazine at 51, and the machine is started. One of the forgings finally reaches the carrier-arms 32 and is immediately carried forward to the chuck-head. When the ends of the arms 32 contact with the chuck-head support 114, the thrust-bar 36 is advanced farther until the forging reaches'the proper position on the chuck-head. The movement to' the chuck-head is performed in approximately one-half of a second and the work is deposited in the chuck-head in'two or three seconds after the start. This portion of the operation is accomplished without a shock owing to the gradual curvature of the camgroove which operates the cam rolle'r +15. Spring 38 on the thrustbar 36 w'ill allow for variation in the length of the forgings, and the plate 37 is mounted free'to' turn with the forging. WVhen the arms 32 are stopped andthe thrust-bar is advanced far ther, the stem 33 of the work-carrier moves backwardly in the groove 34: and expands coil-spring 121 which has its ends connected respectively to the thrust-bar and the workcarrier. Thus it will be seen that when the parts are released, the spring 121 will contract and replace the parts in their normal positions. In addition to the spring121, a counter-balanced stop 122 is provided, the

same being pivoted to a fixed"bar,-so' that when the work carrier reaches the limitof its backward movement, it will contact with the stop 122 and allow the thrust-bar'to move further backward, thereby settingthe parts in their normal position.

Simultaneously with the shell or forging reaching the chuck head, the cam 6a operates the air-control mechanism to contract the sections of the chuck-head on the work; and at once the work-del1ver1ng mechanism 30 1s drawn back to normal positlon. In the meantime, the t0'ol'117 has approached'the forging and has started'to cut. As the too'l' or cutter moves toward ithe'nose of the forging, gage-arm115descends onth'e'inclined end of cam 116 anc'l'in doing so the wheel of th'ecutterll'f runs off the work, the tool 84 moves to position in front ofthe work and enters and faces the same. Next, tool 85 moves quickl'yto andonto the work. When tool 85 is withdrawn from the work, the tool-cylinder is moved to the far end of the carriage and pivoted yok'e 102 engages fixed cam 101 and expands the thread tap 94 and at the same time the cylinder 17 is slightly rotated to move the tap and tool 95 to the horizontaloperating plane. Then the cylinder 17 sta'rtsto slide backwardly to present to the work in succession thetools 95 and 9 1. As the cylinder returns to its initial position, the ball 96 and groove 98 rotate this cylinder 'backwardly to again place the tools 83, 84 and 85 in the horizontal operating plane. The work upon the forging now being completed, the delivering mechanism advances and the work is pulled from the chuck-headupon the work-carrier by the release mechanism on the end of the thrustbar, the chucl hea'd being first released by the aii' controlled n'i'ec-hanism operated by the cam 63. The work is then delivered to the magazine and discharged through the chute 50. At this time, every part of the machine is set to perform another cycle of operation. The speed of approach and cutting of the work varies at different stages, and this variation is controlled by the design of the grooves.

A spring 19 is providedin one side of the groove 19 of the cylinder 16 to allow the wheel of thegage-arm 115 to deflect should a shell or forging slightly larger than usual be presented. There is but little deflection possible owing to the strength of thesp'ring, and since the cam 20 moves from the free end to the fixed end of said spring, there is a certainty of a correct taper at the start of the cutting operation.

An angular hook-shaped lug 103 is provided on the end of the thrusting bar 36, onearm of which is adapted to contact with the rear Side of the lever 103 to hrace the same and to prevent undue strains being imposed upon said lever and its pivot when extracting a shell from the chuck-head.

When the fingers 56' rise to release the forging 'which is resting against them, fingers 57 also rise and contact with the forging'and impart to the same a glancing blow to start it on its downward movement toward the arms 32,'and said fingers 56 and 57 are so positioned relative to each other, that when the next succeeding forging leaves the fingers 57, it almost immediately con- Preferably, the cam rollers 20, 45, 60 and 79 are provided with ball-bearings which engage against theside of the cam grooves.

It will be observed that the mouth 51 of r the magazine is shaped similarly to the forgings, so that they can only be fed into the magazine with their butt ends facing in the direction of the chuck-head.

A cover 16 is provided above the cylinder 16 to prevent work chippings from getting into the groove 19.

The machine as shown is especially rigged with only certain tools to accomplish the rough turning and finishing, but it will be understood that other extra tools can be utilized for further finishing by providing places for them on the tool cylinder and desi ning the cam grooves accordingly.

It will be understood that I may greatly vary the details of construction without departing from the spirit of the invention defined in the claims. For instance, I might find it advisable to do away with the delivery mechanism, in which event I would also do away with the particular type of chuck shown and use instead a work-holding mechanism in which the shell would lie in a rack provided with semi-circular rows of balls on which the shell would rest and rotate. This rotation of the shell would be caused by a movable body, such as a rubber wheel or chain, for instance, pressing in its movement hard against the lon; side of the shell. The mechanism would, of course, be moved close to this rack, but otherwise no material change need be made except in the detail provisions for the rack. I might also provide an endless-chain table to travel throu h the machine carrying a succession of shells from a magazine to a discharge chute. On the sections or block links of this chain would be nrovided shell rackssimilar to those suggested above. The tools would all be acting separately and simultaneously on the various shells as they pass and so in this way several tools would not be idle while one would be working. The shells would be constantly feeding at one end of the machine and discharging at the other. The nature and scope of the invention having been thus indicated and its preferred embodiment having been specifically described, what is claimed as newis:

1. An automatic lathe comprising a rotatable chuck. a work magazine. a delivering mechanism for carrying the work back and forth between the chuck and'm'agazine. carriage extending across the lathe, a tool cylinder, carrying a plurality of tools and mounted on said carriage to slide transverselyfof the lathe. a 'control'cvlinder also mounted on saidcarriage and adapted to slide said tool cylinder back and forth, and a master cam-wheel for reciprocating said image and w ek delivering mechanis 2. An automatic lathe comprising a rotatable chuck, a work magazine provided with a work feeding and discharging mechanism, a delivering mechanism for carrying the work back and forth between the chuck and magazine, a carriage extending across the lathe, a tool cylinder carrying a plurality of tools and mounted on said carriage to slide transversely of the lathe, a control cylinder also mounted on said carriage and adapted to slide said tool cylinder back and forth, and a master cam-wheel for reciprocating said carriage and'work delivering mechanism and operating said work feeding and discharging mechanism of the magazine.

3. An automatic lathe comprising a rotatable expanding and contracting chuck, means for expanding and contracting said chuck, a work magazine, a delivering mechanism for carrying the work back and forth between the chuck and magazine, a carriage extending across the lathe, a tool cylinder carrying a plurality of toOls and mounted on said carriage to slide transversely of the lathe, a control cylinder also mounted on said carriage and adapted to slide said tool cylinder back and forth, and a master camwheel for reciprocating said carriage and work delivering mechanism' and operating the means for expanding and contracting said chuck.

4. A lathe embodying a main drive-shaft, a rotatable chuck, a work feeding and discharging magazine, a delivering mechanism for carrying the work between the chuck and magazine, a tool holder provided with a plurality of tools, and means operated by said main drive-shaft for automatically feeding the work to the delivering mechanism and discharging the work from the magazine and operating the delivering mechanism to cause it to deposit the work in and remove it from the chuck, and operate said tool holder'to cause it top-resent its tools in successive order to'the work.

successively tothe work, and means for au-' tomatically oscillating said tool holder to presentanother rowof tools when the end of one row is reached,- j

6. In a lathe having means for holding and rotating the work, a tool holder mounted to reciprocate both longitudinally and transversely of the work,and also-oscillate on a horizontal axis, said tool. holder being provided with a plurality of radially ex:

vided with a plurality of rows of radiallyextending tools, said tool holder being constructed and mounted for both reciprocation and oscillation to present the tools in different rows to working position and present each tool separately to the work, and means for automatically reciprocating and oscillating said tool holder.

8. In a lathe of the character described having a rotatable chuck,'a tool holder pro-- vided with a plurality of rows of radiallyextending tools, means for automatically reciprocating the tool holder transversely of the work to present the tools in each row successively to the work, and means for antomatically oscillating the tool holder at the end of each reciprocatory movement to position the different rows of tools to a horizontal working plane.

S). In a lathe of the character described having a rotatable chuck, a tool cylinder provided with a plurality of rows of radially-extending tools, means for automatically reciprocating the tool cylinder tra nsvcrsely of the work to present the tools in each row successively to the'work, a collar on said cylinder providedwith a guide lug to guide the cylinder in its reciprocatory movements, and means for automatically oscillating the cylinder at the end of each reciprocatory movement to position the different rows of tools to a horizontal Working plane. i i w 10. In a lathe of the character described having a rotatable chuck, a tool cylinder provided with a plurality of rows of radially-extendingtools, means for automatically reciprocating the tool cylinder transhaving a rotatable chuck, a tool cylinder provided with a plurality of rows of radially-extending tools, means for automatically reciprocating the tool cylinder transversely of the work, and means for automatically oscillating said cylinder at the end of each reciprocatory movement comprising a rotatable ball fixed in a socket formed in the cylinder and a fixed guide plate provided with an endless groove to receive said ball.

12. In a lathe of the character described having a rotatable chuck and a movable tool holder, a delivery mechanism having a workcarrier for carrying the work to and from said chuck, and a magazine having a feed chute and a discharge chute having a gap formed therebetween, said work-carrier being adapted to be positioned in said gap to receive the work from the feed chute and also to allow the work to be moved therefrom into the discharge chute.

' I3. Ina lathe of the character described having a rotatable chuck, a movable toolholder, and a feeding and discharging magazine, awo rk delivering mechanism embodying a thrust bar, ,a work-carrier to carry the work between the chuck and magazine, and means on said thrust bar for engaging the work and by which it is pulled from the chuck to said work-carrier.

1 1. In a lathe of the character described having a rotatable chuck, a work delivering mechanism embodying a thrust bar, a workcarrier; and work-engaging means to pull the work from the chuck mounted on said thrust bar, said thrust bar andv'ork-carrier being longitudinally movable with respect to each other, and said work-carrier being provided with means for operating said work-engaging means.

15. In" a lathe of the character described having a chuck and a work delivering mechanism, a work magazine comprising a feed chute and a discharge chute, and means for controlling the feed of the work through the feed chute to the work delivering mechanism and discharging the work from the work delivering mechanism to said discharge chute. V

16; In a lathe, means for holding and r0- tati ng the work, a tool holder mounted to bodily reciprocate transversely of the work, and a control cylinder parallel with the tool holder and mounted to rotate and provided with an endless cam extending around its periphery, said tool holder having means for continuously engaging said endless cam to cause the tool holder to move back and forth transversely of the work.

17. In a lathe having means for holding the work, a tool holder mounted to reciprocate both longitudinally and transversely of the work and also to oscillate on a horizontal axis transverse ofthe lathe, and means for operating said tool-holder to present the tools carried thereby to the work.

18. In a lathe having a work-holder, a carriage, and means for providing relative reciprocation between said carriage and work-holder. a tool-holder mounted to reciprocate and also rotate, and constructed to receive separate tools in different planes to require both a reciprocation and rotation of the tool-holder to bring succeeding tools in the working plane, and means for moving said tool-holder.

19. In a lathe having means for holding the Work, a tool-holder mounted for vertical and transverse movements and constructed to hold a plurality of tools arranged in staggered relation to each other, and means for moving said tool-holder to position the staggered tools successively to the work.

20. In a lathe having means for holding the work, a movable carriage, a relatively long axially-rotatable tool-holder constructed to hold a plurality of tools in a row extending longitudinally of the tool-holder, said tool-holder being mounted for reciprocation on said carriage in a direction transverse to the movement of the carriage to successively present the tools to the work with the cooperating movement of the carriage, and cam cycles and other operating means for controlling the movements of said tool-holder and carriage respectively.

21. In a lathe having a work-holder, a carriage mounted for longitudinal reciprocation, a cylindrical tool-holder constructed to hold a plurality of radially projecting tools and mounted on saidcarriage for bodily transverse reciprocation and also oscillation on a transverse axis, and means for operating said carriage and tool-holder.

22. In a lathe having a Work-holder, a carriage mounted for longitudinal reciprocation and provided with curved ways, a cylindrical tool-holder constructed to hold a plurality of radially projecting tools and mounted on said curved ways of the carriage for bodily reciprocating and also oscillation on a transverse axis, and means for operating said carriage and tool-holder.

23. In a lathe having a work-holder, a carriage, a rotating tool-holder and a control-cylinder mounted on said carriage, and reciprocating means operated by said control-cylinder and also operatively connected to said tool-holder for moving said toolholder into position to present its tools to the work.

24:. In a lathe having a work-holder, a carriage, a tool-holder mounted on said carriage, a rotatable cam means also mounted on said carriage, means operated by said cam means for presenting the tool in said holder to working position, and means supported on the main frame of the lathe for operating said carriage and rotatable cam means.

25. In a lathe, the combination of a frame, a work-holder, a tool-holder consisting of a comparatively long body and means for rotating it on its axis, said body being provided with a plurality of tools extending therefrom at an angle to the axis of rotation, means being provided to bodily shift the tool-holder transversely as well as longitudinally of the frame.

26. In a lathe, the combination of a frame, a Work-holder, a tool-holder, and means whereby said tool-holder and said workholder are relatively moved transversely as well as longitudinally of said frame, said tool-holder carrying a plurality of tools, means being provided whereby the toolholder will be given an additional movement to bring the tools successively into use.

In testimony whereof I hereunto afiix my signature.

HOMER HINGSTON LAWRENCE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G.

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