US610981A

US610981A - Lathe

Info

Publication number: US610981A
Authority: US
Publication date: 1898-09-20
Anticipated expiration: 1915-09-20

Description

No. 610,981. Patented Sept. 20, I898.

' L. E. WHITUN.

LAT'HE. Application filed July 12, 1897.)' N0 Mpdel.) 5 Sheets-Sheet I.

WITNESSES INVENTOB A TTORNE) 'mr. mans PETd$ co. PHOYOLITHO WASHINGTON. n. c.

v Patented Sept 20, I898.

"L.,. WHITON.

LATHE.

(Application filed. July 12, 1897.)

5 sheets sheet 3.

. INVEN r012 \mxbiwa Mhdcom A rrmmer TNE "Drums PETE-is co. PuvrO-ungu. wmmywouv 01:;

No. 6l0,98l. Patented Sept. 20, I898. L. E. WHITON.

LATHE.

(Application filed July 12 18 (No Model.) 5 Sheets-Sheet 4.

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mum mum W 27/ l -5- f8 J A A Y '1 s I I w w (ll/HM! 1M 1/ (um/W!!! Q f0 69 INVENTOI? awzwzwz z zmww/ /w/ um/1111. 1. 1/ m/ I,

EKMWJGQW,

Patented Sept. 20, I898.

L.'E. wmTouQ L A T H E (Application filed July 12, 1897.)

5 Sheets-Sheet 5k Ila (No Model.)

NrTEn TAT ES PATENT Prion.

LAT-HE? SPECIFICATION forming part of Letters Fatent No. 610,981, dated September 20, 1898.

' Application filed July 12, 1897. 1Serial1l'o. 644 299. (No ma.)

citizen of the United States, residing in the city and county of New London, State of Connecticut, have inventedcertain new and usef ul Improvements-in Lathes, which improve-' ments are fully set forth and described in the following specification, reference being had to the accompanying sheets of drawings.

My said invention relates particularly to the tool-carriage and feed mechanisms of engine-lathes, and seeks to provide a carriage upon which is mounted two independently operated sliders adapted to travel thereon at right angles to each other and respectively parallel with and at right angles to the length of the lathe. The said carriage is caused to travel upon the ways of the lathe by the usual feed mechanism, and mechanism is also provided for driving the said sliders upon the carriage either in unison or independently of each other. The said sliders are adapted to receive the usual posts for the support of the cutting-tools, one of said slidersbeing adapted to present its tool to the periphery of the work supported in and revolved by the lathechuck or on centers, while the companion slider supports its tool in such manneras to engage the face portion of said Work.

From this brief description it will be seen that the chief object of my invention is to im-' prove the construction of lathes, to the end that their cutting-tools maybe caused to engage with and operate upon the work within the lathe in directions parallel to the axial center thereof and at right angles to said axial center much more readily than has been possible heretofore, said operations being performed upon my improved lathe either independently of each other or in unison and automatically.

Figure l is a front-side elevation of a por-.

. tion of the head-block, bed, and tool-carriage carriage.

Fig. 3 is an elevation of my newly-invented 'carriageand connections as viewed from the right of Fig. 1. Fig. 4 is a plan view of said carriage and adjacent parts. Fig. 5 shows in plan and partly in section, ona somewhat enlarged scale, the front end portion of the carriage. Figs. 6, 7, and 8 are vertical sectional views taken, respectively, on lines w w, as as, andy 1 of Fig. 5. Fig. 9 is a vertical sectional view taken on line w x of Fig. 8. Fig. 10 is a vertical sectional view taken on line .2 z of the said Fig. 5. Fig. 11 shows detached and in elevation a portion of the mechanism located on the said front end of the Fig. 12 shows in plan and partly in section, on a somewhat enlarged scale, the rear end portion of the carriage. Fig. 13 shows in plan, Figs. 14: and 15 in elevation, and Fig. 16 in elevatiouand section, certain portions of the mechanism mounted upon the carriage hereinafter more particularly referred to. Fig. 17 is a sectional view of a portion of said mechanism. Fig. 18 illustrates in elevation still other port-ions of said mechanism.

As previously stated, my newly-invented improvements relate particularly to the car riage portion of the lathe and the feed mechanism, and as the construction and manner of operation of the lathe proper are well known it is thought necessary to illustrate and describe only those portions immediately related to my said improvements.

Referring to the drawings, the number 10 denotes the bed or body portion of a lathe fitted up with my newly-invented improve ments, and 11 the usual head-stock, with spindle 11 located upon one end of the said bed and serving as a support for much of the mechanism thereof, particularly the spindle that carries the chuck or center, as the case maybe, and the so-called back-gears. Reference-

numbers

12,13, and 14 denote gears forming part of this mechanism; 15, the usual face plate; 16, the work supporting chuck, and 17 the feed-screw by means of which the carriage mounted on the bed 10 is driven.

Referencenumber 18 denotes the usual pair of ways located on top of bed 10 and extending parallel with each other throughout the length of the latter.

Mounted to travel upon ways 18 is the toolsupporting carriage, the main portion of which latter is denoted by the reference-number 19 and is substantially rectangular in shape, the same being mounted upon the ways 18 at right angles to the length thereof. The said main portion 19 of the lathe-carriage has two right-angular extensions,(denoted by reference-

numbers

20 and 21,) which extensions are parallel with each other and with the ways 18 and extend from said main portion 19 toward the head-stock 11.

Extensions

20 and 21 are located over and engage respectively the front and rear ways 18, and while their particular oilice is to sup port certain portions of the carriage mechanism they also serve to provide a long bearing for the carriage upon its Ways and thus overcome any tendency on the part of said carriage to cramp upon the ways when moved thereon.

Depending from the main portion 19 and extension 20 of the carriage is the usual apron 22. This latter is located in front of the lathebed 10, and behind the same the feed-screw 17 is located. On the apron 22 is a hand-wheel 23 and handle 24;, forming parts of the mechanism which brings into operative relation with each other the said carriage and feedscrew. By the proper manipulation of handwheel 23 and handle 24: a bearing 011 the rear of the apron through which screw 17 passes is caused to revolve upon said screw, thus imparting motion to the carriage; but this manner of driving the carriage and the mechanism on apron 22 being old no detailed illustration and description thereof is deemed necessary.

I have already referred to the fact that the lathe carriage has two smaller carriages, terme( sliders, mounted thereon. These sliders are located, respectively, on

portions

19 and 20 of said carriage and are designed to travel upon and parallel with the respective portions of the carriage upon which they are mounted. Hence it will be readily understood that one will travel parallel with while the other moves at right angles to the length of the lathe. The slider of carriage portion 20 is denoted by reference-number 25, and in order to properly support the same the portion 20 is provided on its upper face with dovetail ways 26, extending parallel to its length and adapted to receive a foot portion 25 of the slider 25. Centrally located in and secured to said foot portion 25 and extending parallel to the length thereof is a rack 27, and located in a recess 20 of carriage portion 20 is a pinion 28, engaging said rack. Pinion 2b is mounted on a shaft 29, that is supported in hearings in carriage portion 20 and projects forward from the said portion 20 to receive upon its front end a spider 30. hen the spider is revolved, its shaft imparts similar motion to the gear 28, which latter, meshing with the rack 27, secured to slider 25, causes the latter to travel on its Ways in the carriage portion 20, the direction of such travel being of course dependent on the direction of rotation of the spider 30.

It will now be seen that through the mechanism just described a hand-feed is provided for slider 25 independent of the companion slider; but an automatic power-feed is also provided for the slider 25, as is fully described hereinafter. Slider 25, traveling in the dovetail grooves 26 of carriage portion 20, is itself provided on its upper face with dovetail grooves 31, cut therein at right angles to the direction of its travel. Grooves 31 are pro vided for a small carriage 32, which latter has a foot portion 32, suitable to travel in the grooves 31. Said foot portion 32 of slider 32 is chambered almost throughout its entire length, as at 33, to receive a feed-screw 33, whose shank passes through the end wall of said chamber and bears upon opposite sides of said wall an operating-handle 34L and a collar 35, and thus all endwise displacement of the screw-shaft is prevented, although it may be freely revolved by means of the operatinghandle. Screw 33 passes through a nut 36, tapped to receive said screw and located in chamber 33, but fixcdl y mounted on slider 25. By the revolution of handle 34: screw 33 is caused to travelin nut 36 and impart correspondin g motion to carriage 32, the direction of the travel of the latter being dependent upon the direction of rotation of the screw. The carriage 32 has mounted thereon a toolsupporting post; but this latter feature is described more fully hereinafter.

The main portion 19 of the lathe-carriage supports its slider in much the same way as the portion 20that is to say, dovetail grooves 37 are provided extending throughout and parallel with the length of said portion 1).and the slider mounted thereon (denoted as a whole by reference-number 38) is provided with a foot portion 39, properly shaped to engage said grooves. Motion is imparted to slider 38 upon its ways 37 by means of a feed screw 40, passing through a hole 39' in the foot portion 39 of slider 38. From one end of said foot portion 39 a bushing 41 is intro duced into the hole 39, which bushing etl is tapped to receive the said feed-screw 40. (See Fig. 9.) It will now be understood that the revolving of screw will cause bushing ll. to travel thereon, and thus corresponding motion will be imparted to the slider 38, accord ing to the direction of rotation of the feedscrew 40.

Carriage 32 and slider 88 are each provided in their upper face with an undercut groove 42, extending parallel to the directions of their travel. These undercut grooves receive the tool-posts, (denoted by reference-number 43,) and reference-number 44 denotes a setscrew by means of which the tool 45 of each post is forced down upon a ring 46, encircling said post, the latter being thus clamped between said tool and the upper face of carriage 32 or slider 38, as the case may be, thus securing the tool in its post.

The feed-screw 40 of the slider 38 is supported at the front side of the lathe in a bracket-bearing 47, bolted to the portion 19 of the lathe-carriage, and upon the end of said screw-shaft outside the said bracket is mounted a hand-wheel 48. At the rear side of the lathe the screw 40 is supported in a bearing 49 in a frame 50, projecting rearwardly from the end of the portion 19 of the lathecarriage, the said frame 50 serving also to inclose much of the driving mechanism of said screw 40. Located in frame 50, at right angles to the bearing 49, is a similar bearing 51, which supports the end of a shaft 52, passing therethrough and entering the inclosure within frame 50. This shaft 52 serves, through certain intermediate mechanism which Ishall describe later, as a driving-shaft for screw 40, and motion is imparted to said shaft 52 at the head-stock end of the lathe by a train of gearing. (Best illustrated in Fig. 2 of the drawings.)

Reference-numbers 53 54 denote a pair of bevel-gears located within the inclosure of frame 50 upon

shafts

52 and 40, respectively, and adjacent to the bearings 51 and 49. Gear 53 is fixedly mounted upon its shaft 52, but gear 54 is mounted upon a section 54 of a clutch, which clutch-section 54 is loosely mounted on shaft 40. The companion clutchsection, (denoted by reference-number 55,) is splined upon shaft 40, and the confronting faces of the clutch-sections are provided with the usual alternating recesses and projections 56, which when said sections approach each other interlock and cause the two clutch-sections to revolve together.

Mounted upon the splined clutch-section 55 is a worm-gear 57, which latter as well as said clutch-section are located within the inclosure of frame 50.

It will now be understood that when clutchsections 54 and 55 are locked together screw 40 will be compelled to revolve with the gear 54, which is driven by gear 53 on shaft 52, as shown in Fig. 12; but when said clutch-sections are separated by the sliding of the splined clutch-section 55 on shaft 40 the gear 54 and the loose clutch-section 54' upon which it is mounted will revolve idly on said shaft. (See Figs. 4 and 12). When the parts now under consideration are in the positions shown in Fig. 4, the worm-gear 57 is in proper position to operate with its controlling mechanism,which mechanism I will now proceed to describe, particular reference being had to Sheets 2 and 5 of the drawings.

Hung from shaft 52, just outside bearing 51, and from a point on the outer side of frame 50 in line with the axial center of said shaft, are arms denoted by reference-numbers 58 5!), respectively. The free ends of these arms are connected by a tubular section 60, thus proshort shaft 61, and midway its length said tubular portion is enlarged, as at 62, to allow the tubular portion proper to be cutaway to receive a worm 63, which latter is mounted on shaft 61, said worm being so located on said shaft that it may be rocked into engagement with the worm-gear 57 when the latter has been moved on shaft 40 to the position it occupies when the clutch-sections 54 55 are disengaged. (See particularly Fig. 16.) To impart motion to shaft 61 from the shaft 52, the latter is provided, adjacent the arm 58, with cone-gears 64. The shaft'61 projects beyond the tubular portion 60, and such projecting portion 61 lying parallel with and adjacent to said cone-gears 64 of shaft 52 is adapted to receive a gear 65, such gear being of proper size to mesh with one step of the cone-gear 64, and it will be readily understood that the speed of shaft 61 relatively to the shaft 52 may be varied by providing gears 65 of sizes suitable to engage with the different steps of the cone-gear. Fig. 4 shows the smallest cone-gear operating with gear 65, while Fig. 12 shows the middle cone-gear in mesh with said gear 65.

It will now be seen that shaft 61,driven from shaft 52, may be swung in the arc of a circle from the axial support of the tubular portion 60, the

gears

64 and 65 during such operation continuing in mesh, as explained by Fig. 18. By the swinging of shaft 61 the worm 63 thereon is rocked into or out of engagement with the worm-gear 57; but by reason of the peculiar construction of the mechanism such rocking of the worm into engagement with the worm-gear is possible only when the splined clutch-section 55 is disengaged from its companion clutch-section 54. (See particularly Fig. 16.) It will thus be seen that shaft 61 and worm 63 will be in continuous revolution, but will only act to drive shaft 40 when the worm is in engagement with worm-gear 57.

To prevent the accidental sliding of the splined clutch-section 55 and the rocking upward of the frame bearing worm 63 when the worm-gear 57 is not in proper position to receive said worm,I have out in said splined section, adjacent to the worm-gear 57, on the side thereof opposite the clutch-teeth 56, an annular groove 66. Located on the tubular portion 60, bearing shaft 61, is an upwardly-projecti n g portion 67, somewhat greater in length than worm 63, but extending parallel thereto. WVhen the tubular portion 60 is rocked upward to bring the worm 63 into engagement with the worm-gear 57, said upwardly-projecting, portion 67 enters the groove 66,- and thus prevents the sliding of the splined clutchsection'55 upon screw 40 until such time as the said u p'wardly-proj ectin g portion is rocked downward out of engagement with said groove into the position shown in dotted lines. When the tubular portion 60, hearing worm 63, and the upwardly-projecting portion 67 are in the last-named position, it will be'seen that after clutch-section 55 is slid forward into the position shown in dotted lines in Fig. 16 and full lines, Fig. 12, any attempt to rock said tubular portion upward will bring the portion 67 into engagement with the annular flange 66' at the end of clutch-section 55, and thus prevent the further rocking of tube 60. To limit the downward rocking of the tube 60, the latter is provided with the projection 68, which engages the gear-casing 68, (dotted lines, Fig. 3, full lines, Figs. 14 and 15,) when said tube has dropped sufficientlyto disengage worm 63 from gear 57 and to allow clutch-section 55 to be slid upon screw 40. To remove from tube 60 and its supporting-

arms

58 and 59 the strain or end thrust caused by worm 63 when the latter is in engagement with its worm-gear 57 I have formed a projection 69 on the end of carriage portion 19, which projection is recessed, as at 70, to receive the upwardly-projecting portion 67 of tube 60 when the latter is rocked upward to bring the worm 63 into the position just mentioned. When the portion 67 is in place in recess 70, any endwise thrust of the tube is received upon the end walls of said recess instead of upon the supporting-arms 58 59 of the tube 60, thus taking all such strain therefrom and placing it where it can be better withstood.

It will now be seen that through the described mechanism screw-shaft 40 may be driven at either a fast speed through bevelgears 53 54 or at a slow speed through the worm 63 and worm-gear 57, each of said mechanisms being driven from shaft 52, and it will also be readily understood that said mechanisms are entirely independent of each other and cannot come into interference, for when the clutch is in proper position to permit of the driving of screw 40 by the fast-speed mechanism, Fig. 12, the slow-speed mechanism cannot be rocked upward into position to operate, and when the slow speed is operatin g to drive said screw the clutch-sections are disengaged, and therefore the bevel-gear 52 on clutch section 54 revolves idly on the screw-shaft 40, Fig. 4.

In connection with the mechanisms for driving screw 40 means are provided, which I will now proceed to describe, for controlling such mechanisms. Extending parallel to carriage portion 19 is a tubular rod 71, supported in boxes 72 73, mounted near the front and rear ends of the carriage portion 19. Tube 71 bears on its front end an operating-handle 74, and at its opposite end a collar 75 is mounted thereon, having a stud or arm 76 projecting radially therefrom. The arm 59, supporting the tube 60, already described, is shaped in elevation substantially as shown in Figs. 14 and 15, in which it will be seen that a recess or opening 77 is cut therein, which opening is bridged over by the pin 78. Into this opening 77 the arm 76 projects and engages the under side of pin 78 in the manner shown in Figs. 4, 12, 14, and 15 of the drawings.

It will now be readily understood from the drawings that by rocking tube 71 by means of the handle 74 the radial arm 76 on the 0pposite end of said tube (lying in recess 77 and engaging pin 78) will be correspondingly moved and will act either to rock arm 59 upward or to allow said arm to drop in accordance with the direction in which tube 71 is rocked, resulting in swinging worm 63 into mesh with gear 57 or removing the same from meshing contact therewith. \Vhen the worm 63 is driving the worm-gear 57, the tube 60 is held in its uppermost position by the arm 76 on the end of tube 71, the said arm being then in engagement with the pin 78, as explained. The various parts are then retained in their respective positions by a certain locking device, hereinafter described, which prevents the rotation of tube 71 until such time as said locking device is released.

Box 73, which supports tube 71 near the back side of the lathe, has a circular opening 79 therethrough, of a diameter considerably greater than that of the tube, and each end of said opening is counterbored for a short distance, as at 80. Mounted on tube 7l,within opening 79 of box 73, are two clutch-

sections

81 and 82, splined at 81 82 to the inner wall of said opening 79 and to the tube 71, respectively. The confronting faces of said clutch-sections are provided with clutch-teeth 83, and at the opposite or outer end each is provided with a flange 84 84 of proper diameter to enter the counterbored portion of the opening 79. The ends of the opening through box 73 are closed with caps 85 85, and intermediate each clutch-section and its cap is located a coiled spring 86, which spring serves normally to hold in contact the confronting faces of the clutch. The confronting faces of the clutch-sections are counterbored to receive a flange 87, located on tube 71, about midway box 73. When it is desired to rock tube 71 to throw worm 63 into or out of engagement with worm-gear 57, it is first necessary to move tube 71 longitudinally by means of handle 74 until the flange 87 on said tube pushes before it the clutch-

section

81 or 82, as the case may be, sufficiently to disengage said clutch-section from its companion, after which by means of handle 74 the tube 71 maybe partially rotated to permit worm 63 to be rocked into or out of engagement with gear 57, and so soon as handle 74 is released the spring 86, which has been compressed by the sliding of the clutch-section against which it bears, at once expands and, sliding said clutch-section and tube 71 forward, forces the clutch-section into locking engagement with its companion, in which position it remains until again released by the sliding of tube 71.

To slide the splined clutch section 55 on shaft 40, I have provided a lever 88, hung at 89 on the frame and carrying at one end a pin 90,that enters an annular groove in said splined clutch-section. The opposite end of said lever is pivotally secured to a rod 92, which passes through tube 71 and at the front side of the latter is secured to an angle-lever 93, that is hinged to the carriage portion 19 at 94. By the manipulation of handle 93 the rod 92 is slid longitudinally to rock lever 88 and thus slide the clutch-section either into or out of engagement with its companion section 54.

In connection with the mechanism just described by means of which the driving of feed-screw 40 is controlled means are provided for actuating such mechanism by the slider 38 to stop said feed-screw when the said slider reaches a stated point in its travel on carriage portion 19. To accomplish this result, I have formed on slider 38 a bracketarm 95, which extends over the tube 71 in the manner shown in Figs. 4and 12. Bracket is bored vertically to receive apin 96, the lower end of which pin is adapted to engage collars 97 97 so located on tube 71 that they will be engaged by the lower end of pin 96 just before the slider completes the desired movement in either direction. Assuming now that screw 40 is being driven by worm 57, as shown in Fig. 4, and that said slider is traveling in the direction indicated by the arrow in said figure, it will be readily understood that when the slider 38 has'traveled sufficiently far the pin 96 will be brought into engagement with collar 97, and a slightlycontinued movement of the slider (through pin 96 engaging collar 97, mounted on tube 71) forces collar 97 and tube 71 forward until the clutch-sections 81 82 become disengaged, when the frame supporting worm 63 drops by reason of its weight, the said pin 76 traveling from the position shown in full lines, Fig. 14, to that shown in dotted lines.

Worm 63 being now disengaged from its gear 57 the screw 40 comes to rest and consequently the travel of slider 38 ceases. Screw 40 is now entirely disengaged from both its driving mechanisms and may be freely revolved by means of the hand-wheel 48 to bring the slider back to its starting-point. Should screw 40 be driven by the worm-gear 57 to cause slider 38 totravel in thedirection the reverse to that just explained, tube 71 and the mechanism controlled thereby may be started into action by locating collar 97 on said tube at the proper place to be engaged by pin 96 just before the slider reaches the desired stopping-point-that is to say, the slider 38 (traveling in the direction the reverse of the arrow in said figure) will through pin 96 engage and force before it collar 97, correspondingly sliding tube 71, which through the means already described results in throwing out the driving mechanism of said screw 40, after which the screw 40 may be rotated by means of the handvwheel 48 to return the slider to its startingpoint.

Referring now to the manner of automatically stopping the feed of slider 38 when the screw 40 is being driven by its bevel-gear 54, it will be seen by reference to Fig. 12 that when lever 88 is properly rocked to throw clutchsections 54 and 55 into locking engagement an enlargement 92 of rod 92 (which is pivotally secured to the end of lever 88) abuts the collar 75, which bears the arm 76, in such manner that when the slider, traveling forward, pushes before it said tube 71, as shown in dotted lines, Fig. 12, said enlargement will be correspondingly pushed'forward by the collar 75, resulting in rocking the lever 88 and disengaging the interlocking clutch-teeth 56. Such forward movement of tube 71 and rocking of lever 88 is continued until the clutch-teeth are entirely withdrawn from each other, (dotted lines, Fig. 12,) when the screw 40 stops and is again completely disengaged from its driving mechanism, when by means of hand-wheel 48 the said screw may be revolved to return the slider to its startingpoint.

I have already referred to the fact that

sliders

25 and 38 may be caused to travel in unison, and I will now proceed to describe the manner in which this result is attained. Slider 25 is provided at its end adjacent to the headstock 11 with a downwardly-projecting portion 98, and securely bolted to the under face thereof is a rack 99, which lies in a groove 100 in the under side of the lathe-carriage, said groove extending parallel to portion 20 of said carriage and across the portion 19 thereof. Rack 99, being 1 rigidly bolted to slider 25, moves in unison therewith in its groove 100. int in the bottom of the dovetail way 37, in which slider 38 travels, is a channel 101, similar to the channel 100 just described. Channel 101 extends parallel to carriage portion 19, and located and adapted 'to slide in said channel is a rack 102, similar to rack 99, but, unlike the latter, is not secured to the slider 38. Located in a recess 102 in carriage portion 19 is a gear 103. This latter is adapted to revolve on a vertical stud 104, supported in a plate 105, bolted to the under side of carriage portion 19, said plate serving also to support the gear 103 within the recess 102. The gear 103. is common to both

rack

99 and 102, its teeth being of sufficient length to be engaged by both said racks, as best seen in Figs. 8 and 10.

It will .now be seen that gear 103 serves, when motion is imparted thereto'by either rack, to correspondinglydrive the companion rack. Located at stated distances in rack 102 are openings 105', adapted to receive a stop 106. Then it is desired to cause the

sliders

25 and 38 to travel in unison, the stop 106 is inserted in rack 102, and said stop 106,'when engaged by the traveling slider 38, is forced before said slider, carrying with it rack 102, which latter through gear 103 imparts correspending movement to rack 99 and the slider to which it is secured. (See Fig. 5.) Stop 106 is preferably provided with screw 107, which may be adjusted to engage slider 88 at any point between holes 105'.

In Fig. 5 of the drawings the stop 106 is shown as inserted in one of the holes 105 at the lefthand or front side of the carriage 38; but it will be seen by reference to Fig. at of the drawings that the said stop could as Well be inserted in one of the openings 105 at the right-hand or rear side of said carriage 38, in which latter case motion could be transmitted from carriage 38 to the slider 25 in the direction opposite to that provided for in said Fig. 5. It is generally necessary to provide less travel for slider 25 than for the slider 38, and when such is the case stop 106 is so located in rack 102 that it will not be engaged by the slider 38 until the point is reached when it is desired to impart movement to slider 25, and said sliders then complete their travel together.

lVhen it is desired to use a lathe having a carriage fitted up in accordance with the foregoing description, assuming that the work to be operated upon is in place in the lathechuck '16 and that both the carriage 38 and slider 25 have mounted thereon a cuttingtool 45 in its post 43, it will be seen (when it is desired to operate upon the work at right angles to the line of its axial support) that the complete carriage is first moved on its ways on the lathe-bed 10 by means of screw17 until it is in the proper position relatively to said work to introduce the cutting-tool 45 of slider 38 thereto. Then by means of the mechanism for driving screw 4:0 slider 38 is moved upon its ways to operate upon the face of the work within the lathe. Should it be desired to operate upon the periphery of the work, the carriage 32 upon slider is moved upon said slider to properly engage said work, after which by means of spider (if a handfeed is required) slider 38 is made to travel upon its ways to cause the tool of carriage 32 to properly operate upon the work in the lathe.

If it is desired to operate slider 25 by means of the automatic power-feed, this may be accomplished by means of the

racks

99 and 102, communicating with each other through gear 103, the latter rack being driven by the slider 38, as already explained, and, if desired, the cutting-tools of both the carriage 25 and slider 38 may be caused to operate together upon the work.

It will now be seen that by means of the mechanism described each carriage may be operated independently of the other, or they may be operated in unison; also, that both a fast and slow feed is provided for slider 32 and that slider 38 acts automatically to control the extent of its travel.

Having thus described my invention, I claim-- 1. In a lathe, in combination, a bed, an initial carriage mounted to slide thereon, and provided with supplemental tool carrying sliders mounted to travel on said initial carriage at a fixed angle with each other, and means for transmitting sliding motion from one to the other of said supplemental toolsliders.

2. In a lathe, in combination, a bed, an initial carriage mounted to slide thereon and provided with supplemental tool carrying sliders mounted to travel on said initial carriage at a fixed angle with each other, means for transmitting sliding motion from one to the other of said supplemental tool-sliders, and means for automatically stopping the sliding motion of said supplemental carriages upon the completion of their required movements.

In a lathe, in combination, a bed, an initial carriage mounted to travel thereon and provided with supplemental tool carrying sliders mounted to travel on said initial carriage at a fixed angle with each other, means for transmitting a portion only of the sliding motion of one supplemental slider to the other, and means for disconnecting the two supplemental sliders.

4:. In a lathe, in combination, a bed, an initial carriage mounted to travel thereon and provided with supplemental tool-carrying sliders mounted to travel on said initial carriage at a fixed angle with each other, means for transmitting a portion only of the sliding motion of one supplemental slider to the other, means for disconnecting the two supplemental sliders and means for adjusting each of the supplemental sliders independently.

5. In a lathe-carriage, the combination of cross feed-screw 4-0 having the slidable wormwheel clutch splined thereon, with driving-shaft 52, gears'53 54 the latter provided with clutch-driver 5i, and swinging frame carrying worm 63 adapted to engage with said slidable worm-wheel clutch 55, substantially as described.

6. In a lathe-carriage, the combination of cross feed-screw 40 having the slidable wormwheel clutch 55 provided with annular groove 66 and annular flange 66 splined on said feedscrew, andmovable frame 60 provided with projection 67 and carrying worm (53, said projection 67 being adapted to engage with groove 66 when worm 63 and gear 57 are engaged and to abut against flange 66 when gear 57 is not in position to be engaged by worm 63.

7. In a lathe-carriage, the combination of frame 19 provided with recess 7 O, and the worm-supporting swinging frame 60 having projection 67, the ends of which engage with walls of recess 70, substantially as specified.

8. In a lathe-carriage, in combination, a feed-screw 10, a worm-gear mounted on said screw, a movable frame carrying a worm adapted to engage with said worm-gear, means for moving, locking and releasing said wormcarrying frame, consisting of a suitablymounted longitudinally-movable rock-shaft provided with collar 87 and spring-pressed clutches 81 82, the faces of which clutches are normally engaged, one of the said clutches being splined tosaid rock-shaft and its companion to the supporting-framework, and a connection between said rock-shaft and said movable worm-carrying frame.

9. In a lathe-carriage, in combination, a feed-screw 40, a slidable worm-wheel clutch mounted on said screw, a movable frame carrying a worm adapted to engage with said worm-Wheel clutch, means for moving, looking and releasing said worm-carrying frame, consisting of a suitably-mounted longitudinally-movable tubular rock-shaft provided with collar 87 and spring-pressed clutches 81 82, the faces of which clutches are normally engaged,one of the said clutches being splined to said rock-shaft, and its companion to the supporting-framework, aconnection between said rock-shaft and said movable worm-carr in frame a rod 92 mounted within said tubular rock-shaft and provided with en largement 92 adapted to be engaged by the longitudinally-moving end of said tubular rock-shaft 71 and a connection between said rod 92 and said slidable worm-wheel clutch 55, substantially as described.

10. In a lathe, the combination of a frame 19, supplemental tool-carrying

sliders

38, and 25, mounted to slide on said frame at a fixed angle with each other, rack 99 attached to said slider 25, rack 102 mounted to slide in said frame parallel with and adjacent to said slider 38, an adjustable stop mounted on rack 102 projecting into the path of slider 38 and a pinion 103 connecting

racks

99 and 102, substantially as described.

LUOIUS E. WI-IITON.

Witnesses:

ERNEST L. WHITON, ERNEST M. HARWOOD.