US1545052A - Lathe - Google Patents

Description

W. E. INGHAM July 7, 1925.

LATHE .Fnd Nw. s. 1921 5 Sheets-Sheet 1 W. E. INGHAM July 7, 1925.

LATHE Filed Nov. 5, 1921 5 SheetseSheet 2 Jhly 7, 1925. 1,545,052 f W. E. INGHAM LATHE .Enea New. e. 1921 l s sheets-sheet s July 7; 1925.

W. E. INGHAM LATHE 5 Sheets-Sheet 4 Patented `luly 7, 1925.

UNITED- STATESv WALTER E. INGBLAM, 0F NEWINGTON, CONNECTICUT, ASSIGNOR TO PRATT & WHIT` PATENT OFFICE.

NEY COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.l

LATHE.

Application filed November- To all whom. 4it may concern.'

Be it known that l, 7M/PER E. INGHAM, a citizen of the United States, and a resident of Newington, in the county of Hartford and State of Connecticut., have invented certain new` and useful AImprovements in Lathes, of which the follow-.ing is a specification. This` invention relates particularly to lathes and like machines and more especially to the tool and tool carriage feeding mechanism ltherefor. The primary object of the invention is to provide a lathe with improved feeding mechanism which will greatly improve the` operation and generalappearance of the lathe and which will permit the operator to controlV the lathe with 'greater ease and accuracy.

It is an object ofthe invention to provide an index plate in connection with the lathe tool feeding change speed mechanism and the shifting levers therefor, the' said levers resulting speed being positioned adjacent and shiftable Irespectively along relatively'angular edges of the plate to directlyv point 'out thereon' the imparted by the said mechanism. v

It is another object of the invention to provide in connection with a driving shaft of certain of the change speed mechanism,va sleeve substantially ,surroundingthe shaft and adapted to support certain change speed gearing'driven by the shaft.

Another object of the invention is to provide in connection with certain of the `lathe feeding mechanism and its cooperating eleprovide in connection with the tool feeding ments, an improved gear shifting mecha- .nisin particularly adapted to function as a part of Vthe general combination comprising the invention. y

A further object of the invention is to mechanism, an improved stop rodadapted to be operated either automatically from the tool carriage or by hand, the connection being such that either a rotary or longitudinal movement of the rod operates to shift the feed controlling clutch.

Another object of the invention is to provide in connection with the said change speed feeding mechanism, an auxiliary f eed drive whereby for performing certain op- 5, 1921. Serial No. 513,167.

.annexed hereto and forming a part of this specification, I have shown certain embodiments of my invention in a lathe but it will be understood that the invention can be otherwise embodied and that the drawings 4are not to be construed as definingl or limiting the scope of the invention, the claims appended to this specification being relied upon for that purpose.V

Referring to the figures 'of the drawings:

Figure 1 is-a partial front elevation of a lathe comprising the present invention.v

Fig. 2 is an end View thereof.

Fig. 3 is an enlarged view of the index plate shown'in Fig. 1.

Fig. 4 is an elevation of the headstoc'k, a portion thereof being shown in longitudinal vertical section, taken on the line 4-4 of Fig. 8.

Fig. 5 is a vertical longitudinal sectional View through the gear boxbeneath the headstock, taken on line 5 5 of-Fig. 8. l

Fig. 6 is a vertical cross sectional view thereof on line 6 6 of Fig. 5.

Fig. 7V is a fragmentary plan View of mechanism shown in Figs 5 and G.

Fig. 8 is an end elevation of the l-.ead-

' stock.

Fig. 9- is a fragmentary front elevation. of a portion of Fig. 8. i Y

Fig. 1() is a fragmentary sectional plan view on line 10-110 of Fig. 8.A

Fig. 11 is an end elevation ofthe machine similar to Fig. 8 but showing a re-arrangement of certain gearing to provide the auxiliary feed drive heretofore referred to. Y

Fig-12 is a vertical sectional view thereof taken. on line 12-12 of Fig. 11.

Referring more specifically to the drawings by reference characters, 14 indicates thc bed of a lathe supported on a base 2. A headstock 3 and a tailstock 4 are` mounted onlthe bed and a tool carriage 5 is slidably mounted on the ways of the bed. The tool carriage 5 may be moved longitudinally on its ways either from a screw 6 or a feed shaft 7, the feed shaft 7 also being adapted to operate the tool slide 8 for the cross feed in the usual manner. The construction of the lathe apron and carriage mechanism is specifically shown and described in my copending application Serial No. 498,151, filed September 2, 1921. A rotary spindle 9 is mounted in 1the headstock 3 and is driven.

from a motor 10 in the base by the improved mechanism comprising the subject matter of a copending application to Ingham & Whitehead, Serial No. 513,319 filed on even date herewith.

The screw 6 and feed shaft 7 are adapted to be driven from the spindle 9 and their operations controlled by the improved mechanism to b'e described. The feeding mechanism is driven from either of gears 11 or 12 on the spindle.V Gear 11 meshes directly wth a gear 13 loose on a shaft 14 and the gear 12 is adapted todrive a-gear 15, also loose on the shaft 14, in the direction opposite from gear 13 through an idler' pinion 16. The idler vpinion 16 may be shifted entirely out-of mesh with gear 12 by a handle 17 when desired. A reversing clutch 18 is provided on the shaft 14 for operatively connecting such shaft with either gear 13 or to drive the said shaft in either direction.

The change speed mechanism within the driving connection from the spindle to the screw 6 and feed shaft 7 comprises two cooperating sets of change speed gearing. It should `be understood that one said set of change speed gearing is adapted to cooperate with the other set to multiply the speed changes thereof whereby the screw or feed shaft may be driven at a reat variety of speeds. The first said set 1s comprised between- shafts 14 and 19 and will now be described.

A relatively long gear 20 is'pinned to shaft 14 and haskeyed thereto a relatively large gear 21. A like pair of gears 22 and 23 are reversibly mounted in like manner on shaft 19. A compound gear comprising a large gear 24 and two slnaller gears 25 and 26 secured to the opposite sides thereof is slidably mounted on an intermediate shaft 27. The compound gear may ipe moved along shaft 27 to. drive the shaft 19 from the shaft 14 at any one of three speeds. In Fig. 4, the drive of shaft 19 is illustrated as being at the slowest speed, through gears 20, 24, 26 and 23. In the intermediate position of the compound gear, the shaft 19 would be driven at the intermediate speed through gears 20, 24v and 22.l In the extreme left hand position of the compound gear (Fig. 4), the shaft 19 would be driven at the hlghest speed through gears 21, 25,

24 and 22. The cooperating means for shifting the compound gear will be hereinafter described.

The above-referred-to second set of change speed mechanism c`omprises a conical set of gears of the general type coinmonly used in lathes, such mechanism being shown in detail in Figs. 5 and 6. A shaft 28 has mounted thereon a conical set of gears 29 varying uniformly from the smallest gear 29 to the largest gear 29h. The shaft 28 is adapted to be driven from a parallel shaft 30. A gear 31 on the end of shaft is driven from a gear 32 on the end of shaft 19 through an idler gear 33 (Figs. 5 and 8). The idler gear 33 is supported by an arm 34 mounted on a hub 35 about the shaft 30. The gear 31 may be placed in either of two positions on the end of shaft 30, a spacing collar 31a being adapted to fill the space'not occupied by the gear. Such construction permits of compounding the gears for varying the feeding speed when desired. The shaft 30 is adapted to be driven in either direction at any one of three speeds from the spindle through the mechanism shown and thus far described.

A hanger or lever 36 is mounted for sliding. and rotary movement on the exterior of a sleeve 37 substantially surrounding the shaft 30. A drive pinion 38 is splined tothe shaft 30 and is provided with bearings 39 at its ends engaging withinthe sleeve for supporting the pinion. An idler gear 40 in mesh with pinion 38 is mounted on a shaft 41 in the hanger. It will be seen that vthe hanger and pinion are slidable along the shaft and sleeve and the hanger is rotatable with the `sleeve for engaging the idler gear 40 with any one of the gears 29. A handle 42 is secured to the hanger 36 and is' provided with a spring pressed detent member 43. The handle is shiftable along the inclined slot 44 (Fig. 1) and into any one of the recesses 45 to place the idler gear 40 into mesh with any gear of the conical set 29, the spring pressed detent 43 being engageable in any one of the holes 46 to hold the hanger and its mechanism in driving engagement. As will be seen, the sleeve 37 acts as a support both for the pinion 38 and the hanger 36 thereby providing a rigid mounting for the hanger driving mechanism and leaving the shaft 3() free to perform its driving function only. f

Thescrew 6 is mounted ceaxially of the cone gear shaft 28 and has keyed thereto one element 47 'of a toothed clutch, the other element of'such clutch being in the form of a gear 48 splined for longitudinal movement on the shaft 28. The feed shaft 7 is coaxial of the driving shaft 30 and has keyed to the end thereof a gear 49 in mesh with an-idler gear 50 on ashaft 51.

K plied A hand lever 52, in connection with a gear shifting fork 52, is provided for sliding the gear 48 either into a clutching engagement with the clutch element 47 to drive the screw or into a meshing engagement with idler gear 5() to drive the feed shaft 7. It will therefore be seen that either the screw or feed shaft can be driven at any one of a number (thirty-six) of speeds equal to the product of the number of change speeds of the first set (illustrated as three vmultiby the number of change speer s of the lsecond set (illustrated as twelve).

'lhe feed reversing clutch 18 heretofore defined is adapted to be operated by a clutch rod 53 extending longitudinally of the machine. A rock shaft 54 has a yoke 55 thereon engagingr the clutch. This rock shaft has a tongue and groove connection 56 with one end of a coaxial shaft 57. A gear segment 58 on shaft 57 meshes with a gear segment 59 on one end of a relatively right angular shaft 60 mounted in a bearing 61, the shaft (30 being parallel with and above the rod 53. The ,other end of shaft G0 has secured thereto an arm 62 in toothed engagement with an arm 63 on the rod 53. An arm 64 on the other end of shaft 57 has toothed engagement with a cylindrical rack 65 on the rod 53. From the construction described, it will be seen that longitudinal movement ofrod 53 operates through the arm 64 to shift the clutch 18, and furthermore a rotary movement of the rod operates through the arms 63 and 62, shaft 60 and gear segments 59 and 58 to rotate the shafts 57 and 54 to shift the clutch. The operalive connection is such that the clutch rod always moves longitudinally `and'rotates simultaneously. A spring pressed detent 66 is adapted to engage in any one of three annular grooves 67 in the clutch rod for holding the rod and clutch mechanism in one or the other of its driving positions or in the neutral position. The clutch rod is adapted to be automatically shifted longitudinally by the carriage 5 engaging adjustable stops 68 thereon. The clutch rod may be rotated to shift the clutch by hand from a handle 69 mounted on the carriage and splined to the rod. It will be understood that the normal and usually preferred method of automatically operating a reversing clutch is by shifting the clutch rod longitudinally through adjustable stops on the rod and the most convenient method of operating the same by hand is by slightly rotating the rod. These two preferred methods are combined in the operation of the construction just defined and the result of such construction is an improved clutch shifting mechanism adapted to be operated either automatically or by hand in the most convenient and preferred manner.

The improved mechanism provided for shifting the compound gear 24--26 of the first mentioned change speed gearing, which mechanism is particularly constructed to cooperate with other features of the invention, will now be described. This mechanism is shown in detail in Figs. 8, 9 and 10 of the drawings. An arm 70 is pivoted on a pin 71 at one end and is provided with a fork 72 at its other end engaging about the periphery of the gear 24. Oscillatory movement of this armabout its pivot 71 is adapted to shift the said compound gear along its supporting shaft 27. A shifting lever 73 is pivoted on a bearingl7ll about the cone gear shaft 28 and is provided with an operating handle 7 4 on one end thereof. The other end of the lever is forked to engage a pin 75 mounted in a vertically movable slide 7G. The slide has a pin 77 therein engaging the arm 70 within a groove 7 S eccentric of its axis of rotation 71. It will be seen that movement of the lever 7 3 on its axis 28 moves the slide vertically and such movement of the slide operates through the groove 78, because of its eccentricity, to Swing the arm 70 and shift the compoY nd gear axially. As shown in Fig. 1, the l flindle 74 extends through a slot in the feed gear box 79 and is adapted to engage in any one of three holes 80. The handle is provided with a compression spring 81 to hold the same engaged within the hole selected thereby holding the compound gear in its driving position. In Fig. .1, the handle is shown engaged within the uppermost hole which corresponds to the slowest speed, indicated by the position of the compound gears 24 and .26 in Fig. 4. Positioning the lhandle in the Iniddle and lowermost holes is adapted to place the compound gear in the intermediate and fastest speed positions respectively. y

Asy illustrated in Figs.- 1 and 8, 1 provide an index plate 82 on the gear box in a position to directly cooperate with the gear shifting levers 42 and 74. This plate is provided with ya. plurality of series o1' index numerals extending longitudinally and laterally across the same. that the number of. longitudinal series (three) corresponds to tht` number of gear shifts in the4 first mentioned change speed mechanism and that one of eac-h of the gear shifting lever positioning holes is placed directly beside one of each of the said longitudinal series. It will furthermore be noted that the index plate is placed directly over the inclined slot 44, within which moves the gear shifting lever 42, one of each of the said laterallyextending series being directly opposite one of each of the recesses 45. The numerals beneath the word stud i in the first transverse series on the i`ndex plate indicate the size of gear 32 which must be used to obtain the feed- It will be noted llO ing speeds indicated by the plate, a fortyeight toothed gear being required as shown. The numerals beneath the Word screw in the second transverse series on the plate indicate the size of gear 31 which must be used to obtain the feeding speeds indicated by the plate, a seventy-two toothed gear being required in the three longitudinal regular series as shown. The purpose of the sixty-nine toothed gear shown on the plate will be hereinafter described.

The numbers shown in the several series on the index plate, indicate in terms of threads per inch, the longtiudinal movement imparted to the carriage 5 by the screw To obtain the desired feed of the carriage in such terms, it is only necessary to l set each of the gear shifting levers 42 and 74 in the positions directly opposite the series in which the numeral of such desired feed is located. For example, if it is desired to feed the carriage at a speed of twelve threads per inch, the lever T4 is set in the middle hole which is opposite the middle longitudinal series containing the numeral 12, and the lever 42 is placed in the sixth recess 45 which is opposite the transverse series containing the numeral 12. In these positions of the levers, the gear ratios is such as to give the desired feed and the positions of the levers along the plate directly point out thereon the resulting speed or feed. As shown in Fig. 1, the gearing is set to move the tool carriage longitudinally at the rate of eighty threads per inch.

As has been described in connection with the index plate, the gearing provides thirtysix speed changes in which the threads per inch vary from 1% to 80. These several ratios provide a feed for cutting most of the usually required threads. It may sometimes be desired, however, to cut a thread or threads not included in the gear ratios as shown by the index plate. In such case, it is only necessary to substitute a gear of the proper' size for either of the gears 31 or 32. For example, the standard pipe thread comprises ll/Q threads per inch. Such numeral is not shown on the index platein the said thirty-six speeds corresponding to the thirty-six threads varying from 1% to 80 threads per inch. By substituting a sixtynine toothed gear for the seventy-two toothed gear, the twelve threads per inch position of the levers becomes a 111/2 threads per inch position. The substitution of such gear will of course likewise change the other numerals indieated on the plate. As indicated on the pla-te, when using the sixtynine toothed gear for forming pipe threads, the gear shifting lever 74 should be placed in the middle hole 80. It will therefore be understood that by using the said fortyeight and seventy-two toothed gears, the ordinarily required threads per inch may be eut merely by shifting the levers 42 and 74 and that when it is desired to cut any other thread, such operation may be accomplished by the substitution of other gears for the gears 31 and 32 or by compounding the gearing, desired.

The use of the plate so far defined applies only to the longitudinal feed of the carriage by means of the screw G. The further use of such plate in connection with the feed shaft 7 will now be described.

The feed shaft 7 is adapted to either move the tool carriage on its ways longitudinally of the bed or to move the tool support e transversely on the carriage to obtain the cross feed of the tool in the usual manner, The notation Feedzl-I-(Gxthready at the bottom of the index plate indicates that the longitudinal or transverse feed of the tool in inches through the shaft T per each rotation of the spindle or work equals one divided by six times the number opposite the levers 42 and T4 on the plate indicating the threads per inch. Such feed, in fact, is the thickness of the chip taken in the turning operation. For example, if lever 74 were set in the uppermost hole and lever 42 set in the eighth recess 45, the threads-perinch numeral indicated on the plate thereby would be 40. shaft T and the thickness of the chip taken would be It frequently happens that a machine is used for a relatively long period for performing a certain standard operation wherein a single feeding speed is used continuously and wherein the various feed speed changes heretofore defined are not required. During such period, the change speed mechanism performs no useful function except to drive the feed shaft or screw through the one feeding speed. A feed change speed gearing, as that heretofore disclosed, wherein a great variety of feeding speeds may bey readily obtained, is necessarily complex and involves a great amount of gearing. 'l`o be required to operate all such gearing when performing a standard operation as above referred to, is a useless waste of energy. Furthermore, such long periods of operation at a single speed tends to unevenly wear the gears comprising the change speed mechanism. For the purpose of avoiding this objection and at the same time securing a smoother feed for such standard operations, I provide an auxiliary feed drive through which the tool feed shaft 7 or screw G may he driven without operating the said change speed gearing. This auxiliary feed driving mechanisml will now be described.

The shaft 14, heretofore described. is illustrated as provided With an end 83 pro- 1-:- 6 40 or or .004 inches.

The feed of the tool through jecting outside the gear box, said lend normally being covered with a protecting cap 84. The cone gear shaft 28 as illustrated is provided with a like projecting end 85 normally fitted with a like protecting cap 8G. When using the change speed gearing above defined as the driving medium for `performy ing the feeding operation, these projecting ends 83 and 85 serve no useful purpose. However, when the machine is to be operated at a single feeding speed for a considerable length of time, as has been above referred to, these projecting, shaft ends in connection with the proper gearing serve as a direct tool feed drlving medium. l

As illustrated in Figs. 1,14 and 12, gears 31 and 32 have been removed from their respective shafts 30 and 19 and placedjon the projecting ends 83 and 85 of shafts Y14 and 28 respectively. The gearsupporting arm 34 has been swung upwardly about the hub 35 to engage the idler gear 33 thereon with the gears 3l and 32. With the gearing thus arranged, it will be noted that the tool feed drive to the screw or feed shaft 7 will be direct from the shaft 14 to the cone gear shaft 28. During such operation, the idler gear 4() is of course disengaged from the cone gears 29 and the shaft 30, with its cooperating mechanism, is idle. It should furthermore be noted that while the feed is obtained by direct drive without going through the change gears, such drive is through the shaft 14 which may be operated in either direction by means of the reversing clutch 18. The automatic operation ofthe tool carriage, as heretofore defined, is therefore usable in the same manner whether operating withthe direct or change speed drive. It willfurthermore bey understood that gears 31 and 32 may be interchanged t vary the feeding speed and other gears may be substituted therefor. Any desired feed may be obtained through the direct drive by providing the proper gears on ends 83 and 85 of the shafts 14 and 28.

lVhat I claim is:

1. A lathe or the like comprising in combination, a feed box, an index plate mounted thereon, change speed gearing within tht box, a gear shifting lever therefor adjacent one edge of the index plate and adapted to be shifted therealong, coperating change speed mechanism adapt- Q.

to multiply the speed changes of' the said change speed gear1ngand a shifting lever for the change speed mechanism adjacent another edge of the index plate and adapted to be shifted therealong, the combined positions of the two levers being adapted to directly point out on the index plate the resulting speed impartedby the said gearing and mechanism.

2` A lathe or the like comprising in coinbination, a feed box, an index plate mountvatively connected to the` spindle,

tions of the two levers being adapted to directly point out respectively along the said longitudinal and transverse series of numerals on the 'index plate the resulting speed imparted by the said change speed gearings.

In a' lathe, the combination of a spindle, a tool support, feeding mechanism for the tool support comprising a shaft operatively connected to the spindle, a shaft adjacent and cooperating with the tool support, two sets of change speed mechanism between the two shafts, a shifting lever for operating each said set, and an index plate provided with a plurality of series of index marks, the said shifting levers respectively being movable along relatively angular edges of the plate in their shifting operatins and the combined positions of such levers being adapted to point out directly on the plate the resulting feeding speed im` parted to the tool support by the said mechanism.

4. In a lathe, the combination of a spindle, a tool support, feeding mechanism for the tool support comprising a shaft operchange speed mechanism driven from the said shaft, a cone gear change speed vmechanism driven from the first mentioned changey speed mechanism, a shaft driven from the cone gear mechanism and cooperating with the tool su port, a. shifting lever for operating each o said mechanisms, and an index plate provided with a lurality of series of index numerals exten ing longitudinally and transversely thereacross, the said shifting levers respectively being movable along relatively angular edges ofthe plate in their shifting operations and the combined positions of such levers being adapted to directly point out along the said series on the plate the resulting feeding speed imparted to the tool support by the said mechanisms.

5. In a lathe, the combination of a spindle, a tool support, feeding mechanism for the tool support comprising a shaft operatively connected to the spindle, a feed shaft and a feed screw adjacent and cooperating with the tool support, change speed mechanism driven from the first mentioned shaft, a cone gear change speed mechanism driven from the first mentioned change speed mechanism, a shifting lever for operating each of said mechanisms, an index plate provided with a plurality of series of index marks, and means operated by a shifting handle for operatively connecting either the feed shaft or the feed screw to the cone gear mechanism, the said shifting levers respectively being movable along relatively angular edges of the plate in their shifting operations and the combined positions of such levers lbeing adapted to indicate on the plate the resulting feeding speed imparted to the tool through either the feed shaft or feed screw by the said mechanisms.

6. In a lathe, the combination of a spindle, a tool carriage, feeding mechanism for the tool carriage comprising a shaft operatively connected to the spindle, a rotary element adjacent and cooperating with the carriage for feeding the same, two Vsets of change speed mechanism between'the shaft androtar element, a shifting lever for operating eac numerals indicating in threads-per-inch the several feeding speeds adapted to be imparted to the tool carriage by the said mechanism, the said shifting levers respectively being movable along relatively angular edges of the plate in their shifting operations, and the combined positions of such levers being adapted to point out directly on the plate the numeral indicating in terms of threads-per-inch the resulting feeding speed im arted to the tool carriage by the said mec anism. f

7. In a lathe, the combination of a s indle, a tool carriage, feeding mechanism or the tool carriage comprising a shaft operatively connected to the spindle, a screw adjacent and cooperating with the carriage for feeding the same, two sets of change speed earing between the shaft and screw, a shi ting lever for operating each of said sets, and ank index plate provided with a plurality of series of index numerals extending longitudinally and transversely thereacross and indicating in terms of threadsr-inch the several feeding speeds adapte to be imparted to the carriage by the said gearing, the said shifting levers respectively being movable along relatively angular edges of the plate and opposite the said series in their gear shifting operations, and the combined positions of such levers being adapted to point out directly on the plate the numeral indicating in termsv of threadsr-inch the resulting feeding speed imparte to the carriage by the said gearing.

8. In a lathe, the combination of a spindle,

` a tool carriage, fee-ding mechanism for th e tool carriage comprising a shaft operatively connected to the spindle, a screw adjacent and cooperating with the carriage for feedof said sets, and an index plate pro-- vided with a plurality of series of index ing the same, two sets of change speed gear-.

ing between the shaft and screw, a shifting lever for operating each of said sets, and an index'plate provided with a plurality ol series of index numerals extending longitudinally and transversely thereacross and indicating in terms of tlneads-per-inch the several feeding speeds adapted to be imparted to the carriage `by the said gearing, one of said levers bein movable substantially in a vertical plane across one edge of the plate in its gear shifting operation, the other lever bein movable at an angle thereto along anot er edge of the plate, and the combined positions of such levers being adapted to point out directly on the plate the numeral indicating in terms of threadsper-inch the resulting feeding speed imparted to the tool carriage by the said mechanism.

9. In a lathe, the combination of a spindle, a tool carriage, feeding mechanism for the tool carriage comprising a shaft operatively connected to the spindle, change speed mechanism driven from the said shaft, a cone gear change speed mechanism driven from the first mentioned change Speed mechanism, a screw driven from the cone gear mechanism and cooperating with the carriage for feeding the same longitudinally of the spindle, a shifting lever for operating each of said mechanisms, and an index plate provided with a plurality of series of index numerals eXtending longitudinally and transversely thereacross and indicating in terms of threads-per-inch the several feeding speeds adapted to be imparted to the tool carriage by the said mechanisms, the said shifting levers respectively being movable alongl relatively angular edges of the plate in t eir shiftlng operations, and the combined positions of such levers being adapted to point out directly on the plate the numeral indicating in terms of threadsper-inch the resulting feeding speed imparted to the tool carriage by the said mechamsm.

10. In a lathe, the combination of a spindle, a tool carriage, feeding mechanism for the tool carriage comprising a shaft operatively connected to the spindle, change speed mechanism driven from the said shaft, a cone gear change speed mechanism driven from the first mentioned change speed mechanism, a screw driven from the conegear mechanismand cooperating with the carriage for feeding thej same longitudinally of the spindle, a shifting lever for operating each of said mechanisms, and an index plate provided with a plurality ofseries of index numerals extending longitudinali)v and transversely thereacross and indicating in terms of threads-per-inch the several feeding speeds 'adapted to be imparted to the topl carriage by the said mechanisms, the

lever for shifting the first' mentioned change speed mechanism, in its gear shifting operation, being movable substantially in a vertical plane along one side edge of the plate lopposite the' said longitudinal series of numerals, the lever for shifting the cone gear mechanism being movable at an angle thereto along the bottom edge of the plate opposite the transverse set of numerals, and the combined positions of the levers being` adaptedrto point out directly on'thc plate and along the said, respective series of numerals in terms of threads-per-inch the resulting feeding speed imparted to the carriage by the said mechanisms.

11. In a lathe, the combination of a bed, a tool carriage mounted for sliding movement thereon, feeding mechanism for the carriage comprising a clutch, a stop rod, an operative connection between the rod and clutch for shifting the clutch upon longitudinal movement of the rod, another operative connection between the rrod and clutch for shifting the clutch upon rotary movement of the rod, a stop on the rod adapted to be engaged by the carriage to give the rod one of such movements to automatically shift the clutch, and a handle on the rod for giving the rod the other of such movements to shift the clutch by hand.

12. In a lathe, the combination of a bed, a tool carriage mounted for sliding movement thereon, feeding mechanism for the carriage comprising a clutch, a stop rod, a stop adjustable on the rod and adapted to be engaged by the carriage to move the rod longitudinally, an operativek connection between the rod and clutch for` shifting the clutch upon such longitudinal movement of the rod, a handle for rotating the rod, and another operative connection between the rod and clutch for shifting the. clutch upon such rotary movement of the rod.

13. In a lathe, thecombination of a bed, a tool carriage mounted for sliding movement thereon, feeding mechanism for the carriage comprising a clutch, means comprising a rock shaft for shifting the clutch, a stop rod, a stop adjustable on the rod and adapted to be engaged by the carriage to move the rod longitudinally, an arm on the shaft engaging the rod whereby the shaft is rotated and the clutch shifted upon such longitudinal movement of the rod, a handle on the rod, and a further operative Connection between the shaft and rod for rotating the shaft and shifting the clutch upon rotary movement of the' rod by the handle.

14. ln a lathe. the combination of a bed, a tool carriage mounted for sliding movement thereon, feeding mechanism, for the carriage comprising a clutch, a stop rod, an operative connection between the rod and clutch for shifting the clutch upon longitudinal movement of the rod, and another operative connection between the rod and clutch and comprlslng a shaft parallel with the rod and having means thereon operatively connected to the shaft, and rofl whereby rotary movement of the rod will operate to rotate the shaft and shift the clutch.

15. ln a lathe or the like, the combination of a bed, a vtool carriage mounted for sliding movement thereon, feeding mechanism for the carriage comprising a reversing clutch, a 'stop rod operatively connected to the clutch, a plurality of stops adjustable on the rod and adapted to be engaged by thc carriage to shift the rod longitudinally to operate the clutch in either direction, mechanism in connection with the rod and clutch for operating the clutch either upon longitudinal orrotary movement of the rod, a handle connected to the rod for rotating the rod, and means for holding the clutch in either of its driving positions or in the neutral position.

16. A lathe or the like comprising in co1nbination, of a shaft, a gear slidable thereon. an oscillatory element operatively connected to the gear. an element mounted to `move about an axis parallel to the said shaft, an operative connection between the two ele ments, and a handle on the second element, movement of the said handle and second element about thel said axis beingadapted to oscillate the first element on its axis and. slide the said gear on its shaft.

17. A lathe or the like comprising in combination, of an element mounted to move in a vertical plane about a horizontal axis, a gear shifting element adapted to engage a gear and to oscillate about a horizontal axis at right angles to the first said horizontal axis, an operative connection between the two elements, and a handle on the first element, movement of the first element on its axis in a vertical plane being adapted to og cillate the second element to shift the said gear axially.

18. A lathe or the like comprising in combination, of an element mounted to move in a vertical plane about a horizontal axis, a vertically movable slide operatively connected to the element, a gear shifting element adapted to engage a gear and to oscillate about a horizontal axis at right angles to the tirst said horizontal axis, an operative connection between the slide and `second ele# ment, and a handle on the first element, movelnent of the said first element about its axis in a vertical plane being adapted to shift the slide vertically to oscillate the gear shifting element and to slide the said gear axially.

1t). A lathe or the like comprising in cour bination, of an element mounted to move in a vertical plane about. a horizontal axis. a vertically1 movable slide operatively conloo the said first element about its axis in a vertical plane being adapted to shift the slide vertically to oscillatc the gear shifting elcment and to slide the said gear axially.

In testimony whereof, I hereto aflx my Signature.

VALT ER E. INGHAM.

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