US700146A - Turret-lathe. - Google Patents

Description

fm.7e0,|4s. I Patented May 13,1902,

.|. P. LAVIGNE.

TURBET LATHE.

(Application 105. In. 16, 1901. Renewed Jan. 24, 1902.)

(lo Iqdal.) 4 smug-sheet maul lllll lwwimm Patented May I3, 1902.

J. P. LAVIGNE.

TUBRET LATHE. (Application filed Mar. 18, 1901. Rbnewad Jan. 24, 1902.)

4 Sheets-Sheet 2.

(No Model.)

No. 700,l46. Patented May I3, I902.

J. P. LAVIGNE. TURRET LATHE.

(Application filed. Mar. 18, 1901. Renewed Jan. 24, 1902.) (llo llodel.) 4 Sheets-Sheet 3.

.TNE Nomus PETERS co. momu'mo" wnsumam. u. c.

" 2o alining the'same; Fig. 3, a view of the turret UNITED STATES JOSEPH P. LAVIGNE, OF NEW' HAVEN,

CONNECTIQUI}ASSIGNOR TO STAND- I vA nnsoanw 00., OF OI-IIOAGO,5I L-LINQIS, A CORPORATION.

- Tu RRETf-LATH 7 SPECIFICATION forrhingpart of Letters Patent No. 7oo,'14o, dated May 13, 1902. Application filed Mathis. 1901. Emma January 24, 1902. Serial No. 91,065. (No model.)

T 00% whom it may concern:

Be it known that I, JOSEPH P. LAVIGNE, of New Haven, in the county of New Haven and State of Connecticut, haveinventeda newIme provementin'Iurret-Lathes; and I do hereby declarefithe following,when taken in connection with the accompanying drawings and the 1 characters of reference marked thereon, to be a full, clear,and exact description of the same,

10 and .Whichjsaiddrawings constitute part of v this specification, andrepresent, in-

Figure 1, a'view in side elevation of a turret-lathe constructed inaccordanoe with my invention; Fig. 2,'a broken;plan view of the turret end'o'f-the,machine' with the tool-holders removed from the turret; Fig.2 a view in vertical cross-section on the line a b of Fig.

2, showingthe means employed for taking up the wear of, the turret-lockingbolt and reend of the'machine in vertical longitudinal sectiongl ig.v 4:, a reverse plan view of the train employed forimpartin g step-by-step rotation to the turret, including the star wheel Fig. 5, a detached iew, in side elevation, of

the lever employed for retractingthe turret locking bolt; Fig. 6, a view, partly in vertical longitudinal section on the line a d otFig. 1, showing the speed-controllinginstrumentalities of the machine and the means employed for cutting them out of action; Fig, 7, a detached broken view in tr'ansverse'section on the line cf of Fig. 6; Fig. 8, a detached view, partly in side elevationand partlyin verti- 3 5 cal section, showing the sliding clutch-block and the sliding collar-block of the machine; Fig. 9, a detached plan view of the sliding collar-block and the levereinployedfor manually operating the same; Fig. 10, a detached 40 broken view, in vertical section, showing a modification of the planet-motion of my speedcontrolling instrumentalities.

My invention relates to an improvement in turret-lathes, the objectbeing to produce a' lathe particularly adapted for use in .theproduction of I'nachine-screws and kindred objects and combining simplicity of construction with convenience and durability in use.

With these ends in view my invention con- 0 sists in'a" machine having certain details of,

construction and combinations of parts, as

will be hereinafter described, and pointed out in the claims.

I In carrying out my invention as herein shown. I employ a turret-drum 2, in the outer edge of which I insert several operating-pins 3, which coact with the short horizontallyarranged' arm at of a bolt-retracting lever 5,

swinging upon a horizontal stud 6, mounted in a bracket 7, secured bya screw 8 to the un- 6e der face of the turret-slide 9, which is reciproca ted back and forth upon the machineframe 10. 'lhe under'face of the arm 4 of the saidlever 5 is formed Witha lifting-bevel 11; and aiflat sustaining-surface 12, under which the pins ride to respectively tilt the lever outwardly and maintain it in its tilted position. The upper end of the said lever 5 is furnished with'a knuckle-joint-like terminal 13, entered into a vertical opening 14,

formed in. the reciprocating turret-locking boltl15, which is located in a long groove 37, formed-to receive it in the turret-slide 9, the inner end" of the said bolt being adapted to be entered into looking-slots 16, formed for its' reception in the locking-ring 17 carried by the turret 18,,which is of any approved construction. The outer end'of the bolt 15 is formed with a deep counterbore 19 for the reception of the inner end of a heavy spiral 8o spring 20, the inner endof which rests upon the bottom of the said counterbore 19 and the outer end of which'impinges against the arm 21 ofthe slide 9. Under this construction the spring 20 constantly urges the bolt 15 inward toward the locking-ring 17 of the turret 'l8.'The engagement of one of the pins 3 with the [arm fioffche bolt retracting lever 5 willfcause the same to be tilted outwardly or retired, with theeflt'ect of moving the bolt 15 o outwardly away from the'ring 17 and against the tension of. the spring 20. This is the automatic action of the bolt. -In case, however, it is desired to retract the "bolt man ually for. the unlocking ofthe turret; Lpro- 5 vide the bolt with a handle 22, whic'h'is'secured to the outer end of a long rod 23, pass ing through the arm 21 of the slide, through the spring 20, and through the cou'nterbore 19, and having'its extreme innerend screwed to:

.into a threaded opening 24, leading out of the bottom of the cou'nterbore 19.

After one of the pins 3 has performed the wearof the bolt or re-aline the same, the sup;

function of actuating the bolt-retracting lever 13 it immediately performs the additional function of turnin g the star-wheel 25, which is located at the lower end of a sleeve 26, mounted upon a heavy tapering stud 27, depending from the turret-slide 9, as clearly shown in Fig. 4. The upper end of the said sleeve 26 terminates in a pinion 28, meshing into an intermediate pinion 29, journaled upon a stud 30, depending from the slide 9. The intermediate pinion 29 meshes into a driven pinion 31, located at the lower end of a long sleeve 32, which extends upward through the turret 18, which with its related instrumentalities I consider it unnecessary to describe, as their construction is the same or substantially the same as that shown and described in my prior patent, No. 623,322, issued April 18, 1899.

I may here state that the sustaining-face 12 of the arm 4 of the lever 5 operates to hold the lever 5 in its tilted position, in which the lever holds the bolt 15 in its unlocked position until after the pin 3 has engaged with one of the arms of the star-wheel and moved the same suiiiciently to start the rotation of the turret and carry the same far enough to move the slot 16 in the lockingring 17 of the turret, from which slot the bolt 15 has just been retracted out of alinement with the inner end of the bolt, so as to cause the same to ride upon the surface of the said ring. If it were not for this slight actuation of the star-wheel prior to the release of the lever 5 by the pin 3, the bolt would be shot by the spring 20 back into the slot 16 and relock the turret. The slide 9 is reciprocated back and forth by means of cams 33, which are secured to the said turret-drum 2, and which coact with an antifriction roll 34, formed upon the lower end of the heavy stud 27, before mentioned.

For the purpose of taking up the wear of the bolt 15, as well as for the purpose of realining the same, I employ two tapering gibs 35 and locate the same on opposite sides of the turret-locking bolt 15, as shown in Fig. 2, in the spaces 37 37, formed between the opposite faces of the said bolt and the outwardly-inclined outer walls 36 36 of the deep groove 37, formed in the slide 9 for the reception of the bolt. These gibs are narrower than the groove 37 is deep and are adjustably supported above the bottom of the groove by-means of supporting-screws 38 38, of which there is one at each end of each gib. The lower ends of these screws project through the lower edges of the gibs and support the same, as shown in Fig. 2, as it were upon short legs. The said gibs are held in place by means of pressure-screws 39 39, of which there is one for each end of each gib, these screws being formed with overhanging heads, which enter shallow segmental notches 40, formed in the outer edges of the gibs near the ends thereof. If it is desired to take up porting-screws of one or both gibs are turned, so as to shorten the projection of their lower ends and allow the gib or gibs to descend lower into the groove 37. After this adjustment has been affected the pressure-screws 39 of one or both gibs are turned inward correspondingly to force the gib or gibs home. When the wear is even on both sides of the bolt, both gibs will be adjusted. When it is on one side only, only one gib will be ad- 3' usted. The bolt, gibs, and screws are closed in and protected by means of a cover 41, consisting of a flat plate dovetailed into the top of the slide 9, the said plate being formed at its outer end with a handle 42, by means of which it is removed. These gibs, it will be observed, are not moved longitudinally in discharging their functions, but are moved laterally in lines at right angles to their longitudinal axes. Taking their cross-sectional form, as shown in Fig. 2, into consideration, it might with propriety be said that the gibs are moved edgewise rather than endwise.

The turret-drum 2 is driven by the main shaft 43, the speed of which is varied to regulate the speed at which the turret 18 is advanced toward and retired from the workholding chuck 44 by speed-controlling instrumentalities of the same general character as shown and described in my reissued Letters Patent No. 11,690, dated August 30, 1898. The said shaft 43 is provided with a large gear-wheel 45, driven directly from a wormpinion 46, located within a housing 47 and mounted upon a tubular shaft 48, carrying at one end a fast pulley 49, upon which runs a power-belt (not shown) from any convenient source of power. ning upon the pulley 49, the worm-pinion and hence the worm-wheel and the shaft 43 are driven rapidly. For decreasing their speed as required when cutting is being done the said belt is shifted to the slow pulley 50, which is mounted upon one end of a shaft 51, which passes through the tubular shaft 48 and is provided at its projecting opposite end with a cup 52, furnished with astud 53, upon which is mounted a pinion 54, which is therefore located eccentrically with respect to the center of the cup and the shaft 51. The said pinion 54 meshes into two gear-wheels 55 and 56 simultaneously. The said wheels correspond in size, but are differentiated in the number of their teeth, the gear-wheel 55 having one tooth less than the gear-wheel 56. The gear-wheel 55 is located within the cup 52 and fixed upon the adjacent end of the tu-' bular shaft 48, while the gear-wheel 56, which is also located within the cup 52, .is loosely mounted upon the said end of the tubular shaft 51 and provided with a hub 57, extending out of the cup 52 and formed with ratchetteeth 58, which are engaged by a pawl 59, mounted upon the adjacent end of a rockshaft 60, which is journaled in the frame of the lathe and extends forward to a point near \Vhen the said belt is run-' than the wheel 55.

roams the pulleys 49 and 50,-where it is furnished with a handle 61, by means of which the shaft 60 may be rocked and thepawl 59 disengaged from the ratchet-teeth 58, whereby the differential gearing now being described may be entirely out out of action, as its performancepower will be communicated to the worm-' wheel 45 through the'shaft 51, the cup 52, the pinion 54, the gear-whee1s'55 56, and the tubular shaft 48, which is coupled with the gear-wheel 56 through the pawl 59; Through these instrumentalities the speed of thepulley 50 will be so reduced that the gear-wheel 45 will move butvery slowly, for the reason that one completeorevolution of the shaft 51 and cup 52 will only rotate the tubular shaft 48 through a distance represented by one tooth of the gear-whee156,which has'one more tooth than the gear-wheel 55. In this connection it may be explained that as the cup 52 revolves and carries-the pinion 54 with it the same will gain what is represented by one tooth on the wheel 55 during each revolution of the cup, because the pinion also meshes into the teeth of the wheel 56,which contains one more tooth Thereforethe pinion 54 operates upon the wheel 56 as a point of purchase to push the wheel 55 and turn the tubular shaft 48, the wheel 56 being prevented from turning by the pawl 59 and the ratchetteeth 58, formed upon the hub 57 of the wheel 56. It .will be understood from the foregoing that when the pawl 59 is lifted out of engagement with the ratchet-teeth 58, so as to leave the wheel 56 free to turn-upon the tubular shaft 48, the differential-gear mechanismwill be cutout of action. 7 The speed with which the. gear-wheel runs determines the speed of the shaft 43, which carries the turret-drum 2, the speed of which determines the speed with which the cutting instrumentalities of the turret 18 are advanced toward and retired from the work-holding chuck 44.. By mounting the pawl 59 upon a rock-shaft 6.0 and furnishing the same with a handle 61 the differential gear may be very readily cut out of action.

For thepurpose of converting the cup 52 into an oil-box I provide it with a flanged annular or washer-like cap 62 (shown in Fig. 6) and secured in placeby the stud 53, which it assists in'supporting. Itjalso assists in supporting a stud 64, which may be used, if desired, in accordance with the modification shown by Fig. 10, in which the pinion 54 is dispensed with and the gear-wheels 55 and '56 replaced by differentiated gears 67 and-68, respectively meshing into differentiated pinions 66 and 65. These gear-wheels 55'and 56 and gears 67 and 68 do not reduce the'speed as much as the pinion 54 and the gear-wheels '55 and 56 and are designed to beused'when the machine is employed for-cutting brass'or other soft metal, as compared with steel. It is obviously easier to change the'gears as described than to change the cams 33'on theturret-drum 2. The shaft 43 also carries a camvdrum 69, furnished with cams 70, which'operate the sliding feeding-block 71,- and with cams 72, which operate the sliding cone-block 73,'both of which are mounted to slide upon a fixed horizontal stud-like shaft74, supported by the frame of the machine. The sliding feeding-block 71 is formed in its upper'end,

Fig. 8, with an oil-chamber 75, which receives a coupling-collar 76 located upon the'rear end of the longitudinally-movable stock-feeding tube 77, which is otherwise of ordinary and in such rotation lubricated by the running of the collar 76 in the oil of the oil-chamber 75 aforesaid. The sliding clutch-block 7 3'is formed with a corresponding oil-pocket 78, receiving a collar 79, forming a part of the sliding clutch-cone 80, which is mounted upon the hollow spindle 80of the machine. This spindle is of ordinary construction and carries the work-holding clutch 44 atits forward end. Grooves 79 79, formed) on opposite sides of the collar 79, receive more or less oil, which is lifted out of the oil-pocket 78 by means of the collar 7 9, which rotates therein. When the clutch-cone 80 is moved from right to left, the thrust of its operation falls upon the shoulder a of the clutch-cone andupon the left-hand face a of the collar 7 9, between close together, which permits the'use of a relatively narrow drum 69, thus making the machine-more compact. Narrow drums in machines of this class are desirable.- For the 'manual operation of the clutchfblock 73 I provide it with a bel'l-crank-operating lever.

81, as shown in Fig. 9, the short inner arm 82 of this lever having universal-joint connectionwith a boss 83, formed upon one side of the block, and the lever being pivotally mounted in a small bracket 84, mounted-in- The said lever 81 prothe machine-frame.

Vides Very convenient means for manually operating the block-73 independent of the cams 22 upon the: drum 69.

The said main construction and which is frictionally rotated nished with shipper-cams 86, which operate the shipper which shifts the belt from the pulley 49 to the pulley 50, and vice versa, this shipper not being shown. The said camwheel is also provided with cams 87, which operate the shipper-lever arm 88, pivotally connected at one end to a shipper-lever 89, which operates a clutch 90, located between the pulleys 91 and 92, which control the driving of the spindle 80. For the purpose of quickly sending the lever 89 to the limit of either of its two positions and forfirmly holding it therein Iprovide the upper edge of the arm 88 with two shallow beveled notches 93 and 9a, which receive the beveled lower end of a spring-actuated plunger 95, which coacts with the walls of the said notches and forces the lever in one direction or the other to the limit of its movement and holds it there.

It is apparent that in carrying out my invention some changes from the construction herein shown and described may be made, and I would therefore have it understood that I do not limit myself thereto, but hold myself at liberty to make such departures therefrom as fairly fall within the spirit and scope of my invention.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a turret-lathe, the combination with the turret thereof, of means for imparting step-by-step rotary movement thereto, a locking-bolt for the turret, a bolt-retracting lever for operating the said bolt in unlocking the turret, a drum, and pins mountedin the said drum and coacting with the said lever and with the said rotating means which are arranged so that each pin operates successively upon the lever and then upon the said rotating means.

2. In a turret-lathe, the combination with the turret thereof, of means for imparting step-by-step rotary movement thereto, includinga star-wheel, a locking-bolt for the turret, a bolt-retracting lever provided with an arm, a drum, and pins mounted in the drum and coacting with the said arm of the said lever for retracting the bolt and unlocking the turret, and then eoacting with the star- Wheel for the rotation of the turret when so unlocked.

3. In a turret-lathe, the combination with the turret thereof, of means for imparting step-by-step rotary movement thereto,including a star-wheel, a locking-bolt for the turret, a bolt-retracting lever provided with an arm formed upon its under face with a bevel and with a flat sustaining-surface, adrum,and pins mounted in the drum and coacting with the said arm of the lever for retracting the bolt and unlocking the turret, and then coacting with the star-wheel for the rotation of the turret.

4.. In a turret-lathe, the combination with the turret thereof, of a turret-slide formed with a deep groove, a turret-locking bolt located in the said groove, means for operating the said bolt, two tapering gibs located in the said groove upon opposite sides of the said bolt, supporting-screws mounted in the said gibs, projecting below the lower edges thereof and resting upon the bottom of the said groove in which the gibs are raised or lowered by means of the said screws,. and pressure-screws mounted in the said slide and engaging with the gibs for forcing the samelat erally inward and holding them in place.

5. In a turret-lathe, the combination with the main shaft thereof, of cnttinginstrumentalities driven by the said shaft, and differential gearing connected with the said shaft for driving the same at varying rates of speed, the said differential gearing including a revolving cup arranged in a vertical plane, a plurality of gears located within the said cup, an annular cap applied to the open end of the cup which it converts into an oil-retaining cup, and one or more studs mounted in the cup and extending through the said cap which they hold in place and which in turn assist in supporting the said studs.

In testimony whereof I have signed this specification in. the presence of two subscribing witnesses.

JOSEPH P. LAVIGNE.

Witnesses:

GEORGE D. SEYMOUR, LILLIAN D. KELsEv.

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