US536615A

US536615A - Screw-cutting lathe

Info

Publication number: US536615A
Authority: US
Publication date: 1895-04-02
Anticipated expiration: 1912-04-02

Description

No Model.) 4 SheetS- Sheet 1.

'- E. FLATHER.

SCREW OUTTING'LATHE. No. 536,615. Patented Apr, 2; 1895.

WIT/1158858: INVEN TO/f QWWM BY (No Model.) I v 4 Sheets-Shet 3. E. FLATHER.

SCREW GUTTING LATHE.

' Patented Apr.- 2, 1895.

. wmsw, INVENTOH J M MM l f/LS ATTORNEY.

( Y 4 Sheets-Sheet 4.

' E. FLATHE'R.

' SCREW CUTTING LATHE. No. 536,615. Patented Apr. 2, 1895;

' WIINESSES. INVENTOH 93 I ,(md

UNITED STATES- x PnTnNT OFFICE.

EDWARD FLA'lHER, or BRIDGEPORT,CONNECTICUT.

'SCRE -W-CU TT ING LATHE.

SPECIFICATION formingpart of Letters Patent No. 536,615, dated April 2, 189-5.

,- Application filed August 27, 1894. Serial No. 621,389- (No model.)

To all whom it maycohcerfi:

Be it known that LEDWARD FLATHER, a citizen of the United States, and a resident of Bridgeport, in the county of Fai-rfield and State of Connecticut, have invented certain new and useful Improvements in Screw-Cutting Lathes, of which the following is a-specification. 7

My invention relates to engine lathes and particularly to an improvement in the screw cutting and feed mechanism therefor.

The details of construction of this my said invention will be fullyset forth and described in'the following specification, and suchcharacteristic features as I believe to be newland novel particularly pointed out in the claims to follow. p

I To enable others to understand my invention reference is had to the accompanying drawings, in which- Figure'l, represents a frontend view of the bed and broken head stock of an engine lathe with my improvedgear plate attached thereto and Fig. 2, is a broken side elevation of the bed and head stock also side elevation of the adjustable gear platei'n closed position'with twoof its gears registering with driving gears mounted on the head stock of the lathe. Fig. 3, is a view similar to Fig.2, but showing'the gear plate in open position, i. (2., out of engage ment with the two gears of thelathe; Figs.4,5

and 6, diagrams of the gears of the head stock engaged with certain gears of thegear plate looking in the direction of arrow 0. Fig. 2. Fig

7,'is an endview of the bed and broken View of the head stockof a lathe showing ainodified construction'forbringing the gear. plate into closed position by means 'of'an angle T lever pivoted to a sthd oh the bed.' Fig. 8, is

a'broken side elevation of the bed and head stock lookingin the direction of arrowimot' Fig. 7. Fig. 9, is an end elevation of the bed I and broken view of the head stock showing still another modification of the means for '45 'bringing the gear plate, withthe gears, into and out of mesh with the gears of the lathe,

which consists of an eccentric sleeve mounted on a stud and supporting the said gear plate. Fig. 10, is a broken sideelevation of thebed and head stock as shown in Fig. 9, looking in the direction of arrow y,- r 7 Its constructionand operation are as-follows: v I

A 1 represents thelathe bed; '2, the head stock mounted thereon.

3 is the gear plate mounted ona reduced portion of the stud4, (see Fig. 3) projecting from the end of the bed 1. The said plate, when in the osition as shown in Fig. 3, can be freely rotatedso as to bring any of its gears to register with the gears of the head stock and itsinward longitudinal movement is limthe shouldered portion d..of stud-4. The outward travel ofsaid plate is limited by the projecting stop e. of the swinging latch 5, which latch is pivotally mountedon the pin 6 of the stud 4. The slut? (see alsoFig 1) is provided in' the end-.ofstud 4 to-accornmodate the latch 5. When,-there'fore',-the plate is cam med against the outer faoe'of said plate,

therein -t'or this purpose, thus maintaining it point f. of said latch ;-will bring the bodyot said latch'belowthesurface of stud 4 so that the gear plate'will slide over it, and; engaging with the stop-e. before'mention'ed, will arrest turther travel and prevent plate'3 droppingoff .itsstudl Projecting from the. gear plate 3.(see. also the sameare the studs 8; each of which carrries also Figs. 2 -and 3) the gears'9'an'd-3"-which are .13, 14, 15, 16; 17, 18,19 and'20"'are\'placed on other gears mounted on .said studsgare equal in diameter to the gears 9.,9 .before (mentioned, although ditferent sizes may be used. 'ThBPQSIBlQHS-Of the several studs'vary. from the center of' plate'fij'proportionate to the studs carryingthetsniall. gears 9. '9' andl'arge twogears of different diameters except (see a of equal diam eter. jIhe other gearslO', '11, 12,

their respective-studs next-to the plate while the-sm aller gears'-21, which are fastened to the gear 20'representqthe extremes of this varia- "The initial driving gea'rflh 0t thetrain is I mounted upon the outer end' .ot the stud 23 ited by the boss 3' of plate 3, engaging with- 3 is in the position shown in Fig. 2, the. head"; of lamb 5. is depressed and the point f thereof a circular'groove',1-not shown,'being formed firmly in its closed position.) Depressing the Fig. 1) and arranged.circu'mferentially about di'ffeienttdia'metersof the gears,-so-'that,the

ter registering with the intermediate gear 33 on the stud 29 of the swing plate, which, in turn, registers with' gear 34 mounted on the projecting end of the feed shaft The said gears 31 and 32 are secured to the sleeve 36, so that they rotate together.

The

gears

22 and 31 are so placed, with respect to each other and the severalgears carried by the plate 3, that when such plate is moved forward, as shown in Fig. 2, two gears of the series thereon will register with said gears, the outer, and smaller gear 21, engaging the gear 22 while the larger gear ll'meshes with gear 31. This feature will be more clearly illustrated by the diagrams shown in Figs. 4, 5 and 6. Fig. 4 represents the engagement of the two small gears 9. 9 of the gear plate '3 with

gears

22 and 31, wherein, as before mentioned, such gears 9. J are of equal diameters, and therefore, theirposition is midway between such gears. In Fig. 5 the gears 13 and 21 are brought into engagement and the diflference in diameter of such-gears'will cause the smaller one 21 to be placedin almost a vertical position with gear 22, so as to enable gear 13 to register with gear 31. InFig. 6 is shown the largest gear or. plate B'engagcd with gear 31 while the small gear 21 registers with gear 22. Thus, as before mentioned, the positions of the several studs 8, on the plate 3, are so placed with respect to the center of such plate, and the diameter of the several gears on such studs, that each set of gears thereon will register with

gears

22 and 31; the outer one,

registering with the former, and the inner gear with the latter, as above described. It will be observed that there are twelve studs on plate 3 each carrying two gears, thus making twelve changes or twelve different pitches that may be cut on the lathe, which comprise.

the number in general use. If more are required, the gear plate may be increased in size to accommodate more studs and gears, thereby increasing the number of pitches indefinitely. A series the gear plate 3, and such holes are preferably arranged on the same radial line with the several studs 8. M V n 38 is-a-stop and 'locatingp'ih' pi'bjectin g from the bed (see also Fig. 3) which registers with the holes 37 of the gear plate, as required. When, therefore, it is desired to cut a certain pitch, the gear plate is rotated uponthe supporting studilntil the proper gears thereon. are brought into position to register with the

gears

22 and 31, as before mentioned, when the plate 3 is moved forward and the pin 38 interlocked with one of the holes 3'7, repreof holes 37, Fig. 1,'aro provided in' sentingsuch position. This pin not only 10- cates the exact position of the gears on the plate with respect to their proper registering with the

gears

22 and 31, but it also prevents the rotation of such plate while it is in operative position. It will be observed that the pin 38 is made suificiently long so as to enter one of the holes 37 of the gear plate in advance of the registering of the gears, thus operating as a guide for the proper engagement of such gears. To insure a ready engagement of said pin with its hole, the point may be slightly tapered, or the mouth of the hole may be slightly beveled forthis purpose.

In cutting screws, the sleeve gear 39 on the end ofthe feed screw 40 is moved forward into mesh with the gear 41 on the feed shaft 35, .while the clutch 43, on the latter shaft, will be disengaged, as shown. Reversing this operation will drive the feed shaft.

I do not wish to be confined to the exact location of the so called driving gear 22, as, in some cases, it may be desirable to allow the spindle 37 to projectthrough the head stock and place such gear thereon. Itother changes are required, beyond the limit represented by the twelve already carried by the gear plate, the swing plate 28 maybe shifted so as to substitute other gears in place of the one 34, on the end of the feed rod.

It will be observed that, the manner of operating the gear plate so as to bring its gears thereon in mesh with the driving gear and idle gear of the lathe, before mentioned, such plate has a longitudinal movement on its stud. As amodification of this feature and one which in some cases may be advantageously used, would be to attach thestud, upon which the-plate is supported, to a swing plate pivotally supported to the bed or other convenient place and thus raise and lower the said gear plate in andout of mesh, in which case, said plate will retain its present rotary movebe replaced by a vertical one.; This construction is shown in Figs. 7. and 8, wherein the carries, similar to that shown in the preceding views; but, for an illustration of the elevating device only two gears, 11 .and 12, are shown. The said plate is rotatabl y mounted upon the stud44, which stud, is also rigidly secured to the middle portion of the handle lever '45 whose lower end ispivotally supported on the stud 46 projecting from the Iath bed. The plate 3 has the hub portion "3to increase its bearing surface on its stud and is locked against rotation thereon by' the nut 47. Theupper endpf the handle lever '45 is provided with the slot-48 whicher'nbraces a'r'educed threaded end of the stud 49 pro- -ing-handle nut 50 is mdunted onthe threaded end of stud 4.9 so as tolock the gear-plate while in closed position.

The operationof the device is as follows;

When necessary tochange the gears the ban;

gear plate 3 is, with respect to the gears it too ment while the longitudinal movement will jecting from. the head stock 2. The tightens dlenut 50 is loosened, whereupon the gear plate will drop a distance represented by the length of the slot 48 which is sufficient to carry any of the gears thereon out of meshwith the driving and idle gears of the lathe. Then the nut 4.7 is loosened so that said plate may be rotated on the supporting stud a distance required to bring any of its gears in position to register with the lathe gears, before mentioned, when thenut 47s-is tightened and the plate carried forward to the position shownat Fig. 7, and the handle nut 50 tightened to re- .tain it there.

' As a further modification relating. to the gear plate I might find it'convenient to employ an eccentric sleeve on the supporting stud of the gear plate, and'journaltheplate on this sleeve, which arrangement, will enable the eccentric to be used as a means for establishing the dilferent vertical positions of the' plates with respect to the lathe gears. This construction is fully shown at Figs. .9 and 10.

- The gear plate 3 like the one shown at Fig.

7, carries, forillustration, the two gears ll and 12 only. The plate-supporting-stud 51-projecting from the bed 1, carries on its reduced portion 'the eccentric sleeve '52. The gear plate 3 .-is provided with theenlar'ged hubs 3 "having a hole therethronghtofit the sleeve .52on which it-isarran'ged to rotate when said plate is dropped.- 53 is a'collar placed betweent heiinner'end ef the gear-plate hub and the/shoulder m of the stud 51. The eccentric sleeve'fifl'has'the. handle 5.4 by means of which it 'is-rot'ated on its studf' The handle nut 55- is-monntedupof'n the'threaded end of the stud 5'1." Toope-rate this device the handle nut'55 is loosened and the eccentric sleeve turned by meansfof its handle oat-until the gears onp1ate13 are disengagedjfrom the lathe gears, before inentionedywhereupon, said plate is rotated until the proper gear thereonis brought into position, when the eccentric sleeve is rotated tobring said gears in mesh with-those of thelathe,'and the handle .nut -55 tightened to hold said plate-rigid. I therefore do not wish to be confined to the exact :the necessary changes of gears to cut the dif-' with .the driving gearand idle to construction-as shown for this purpose, but

hold myselfv at liberty to use this feature as well as the other modification before mentioned.

From theforegoiug;theadvantages of my improvement can readily be seen-and apprew ciated. It is. both cheaply construct'ed'and easily operated. The gear'platecontains fall ferent. pitches in general use. fore, the two gears on the plate When,there are engaged gear of the lathe, allthe other gearson' the plate remain stationary. This feature,as well'as another important 'one not shown in other screw cutting devices, so far as known, viz:- .when the gear. plate is disengaged from ,the lathe gears asshown in Fig. 8 all the gears, screw cutting and feeding, on the lathe as well as on the plate, except the driving gear 22, are in a state 'of absolute rest, so that the lathe may be used independent, as is frequently required, and

thus avoidthe wear incidental to continuous running of said gears.

Having thus described my invention, what I claim as new, and.desire to secure by Letters Patent, is-- 1. An improvement in lathes, of the character described, comprising in combination, with the head stock and bed, a'gear plate, a support therefor upon which said plate is arranged when not in operative or. closed position, to have botha rotatable and longitudinal movement thereon, said plate carrying a'series of gears representing the several pitches ter of said plate, each supportcarrying a pair of gears of the said series, one of which is arranged to register with the driving gear of the lathe and the other to register with an idle gear adjacent to said gear, a support upon which said gear-plate may have both a rotatable and longitudinal movement, and means whereby said plate is securely locked against rotation and longitudinal movement, when in closed position as set forth.

3; The herein described improvement in lathes, comprising in combination, a gear plate carrying independent sets of gears, ar ranged as shown, a support for said plate,

upon which it may be rotated to bring each set of gears or changeof gears thereon in position' to engage with the driving gear and an idle gear of the lathe train, said plate havingalso a longitudinal movement on its support whereby it is brought into 0perativeengagement with the said gear train, means substantially as shown for guiding it into operative position and locking it against rotation, and means for looking it against longitudinal movement while in such position, as described and for the purpose set forth.

4. The herein described improvement in lathes, comprising in combination, a gear plate carrying independent sets or changes of gears arranged circumferentially about said plate, and occupying difierent radial positions from the center thereof, supports for said sets of gears and a support for said plate upon which it may have both a rotatable and a longitudinalmovement, when not in operative position, a driVing gear on the lathe,

Ifi-o a pair of idle, gears locked together and.

mounted on the same bearing-stud, said gear plate arranged to be rotated upon its support to bring any one of the independent sets or changes in l'ine'with the proper gear mechanism of the lathe, and having a longitudinal movement thereon whereby one gear of the set on said plate will register :with the said 4 A eams 'driviug gear and the other with one of the rotary movement, when in operative position,

substantially as described and for the purpose set forth. a r v v 5. The hereindescribed improvement in 'lathes, comprising in combination, a gear plat'ecarrying independent sets of gears,'a support therefor, supports for said gears, said gears fastened so as to rotate together on their respective supports, a fixed stud on the lathe carrying the sleeve 36, with the two gears, 31 and 32, fixed thereto, said gear plate arranged to be rotated on its support and also adjusted in the plane of its rotation so as to bring any one of the several sets of gears thereon in position, one, in said set, registering with the lathe-driving gear, and the other with gear 31 of said sleeve,'while gear 32 of said sleeve registers with the intermediate gear of the feedmechanism, as described and set forth.

, 6. The herein described improvement in lathes, comprising in combination, a gear supportingstud projecting from the end of thelathe upon which said gear plate is rotatplate carrying independent sets of gears, a

ably mounted, supporting studs projectingfrom the inner'fa'ce of said plate, upon which i studs the said independent sets of gears are rotatably mounted, said gears placed bet'ween said plate and the end of the lathe so that said plate will operateas a shield to protect against accidents, combined with the gears of the lathe-with which thegears on said plate are brought into engagement, for the purpose set forth.

Signed at Bridgeport, in the county ofiiFairfield and State of Connecticut, this 25th day of August, A. D. 1894. r

EDWARD FLATHER. Witnesses:

L. D. SANFORD LEWIS F. PELTON.