US655974A - Metal-working machine. - Google Patents

Description

No. 655,974. Y Patented Aug. I4, |900.

R. HAKEWESSELL E. C. HENN.

METAL WORKING MACHINE.

(Application led Dec. 9, 1899.)

Mil/fesses @QM/ww v 'THE nonms Pnzns co PHo'm-Llro.. wAsHmooN. n. c

No. 655,974. Patentad Aug. I4,-I900.

R. HAKEwESsl-:LL & E. c. HENN.

METAL wonKlNa'mAcHmE.

(Application led Dec. 9, 1899.) (No Model.) 9 Sheets-Sheet 2.

' h///fesses f a Ufa/725013* No. 655,974. Patented- Aug;` I4, |900. R. HAKEWESSEU 8. E. C. HENN.

METAL WORKING MACHINE.

"(Application filed Dec. 9, 1899.)

(No modal.) 9 sheets-sheet 3.

Y lllll ill ` fmfd Ill 1 mlm! R. HAKEWESSELL. E. C.;

(Application filed AIlliec. 9, 18990,-

9 Sheets-Sheet 4,

(No Modal.)

Patented Ag. I4, |900. R'. HAKEWESSELL & E. C. HENN. MMMMMMMMMMMM MACHINE.

MIL/765663 No. 655,974. Patented Aug. 14, |900'. n. HAKEwEssELL L E.-c. H ENN.

METAL WQB'KING MACHINE.

(Application led Dec. 9, 1899.)

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v fr wams Pfrzus co, mm uw: msn 10mn. n. c.

Patented Aug. I4, |900. R. HAKEWESSELL & E. C. HENN.

METAL WORKING MACHINE.

(Application fxled Dec. 9, 1899.) (No Model'.) 9 Sheets-Sheet 7,

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No. 655,974. "Patented Aug. r4, |900.

' n. HAKEwEssELL a E. c. HENN.

METAL WORKING MACHINE.

` (Application med Dec. 9, m99.) (No Model.) 9 Sheets-Sheet 8,

Trame 5 FIG' 4 @MW g @Q2/f@ m,

Patented Aug. I4, |900.

B. HAKEWESSELL & I.E. C. HENN. n

.METAL WORKING MACHINE.

(Appliction led Dec. 9, 1899.)

9 Sheets-Sheet 9 (No Model.)

iwf/766866 Y cq. wow-umgl mamma REINHOLD HAKEYVESSELL, OF HARTFORD, AND EDWIN C. HENN, OF

I BLOOMFIFLD, CONNECTICUT.

ivi E'TAL-W'RKIQNG MACHIN E.

SPECIFICATION formingpart of Lettersratent No. 655,974, dated August 14,1900.

Applica-5011 filed Deember 9, 1899; Serial No. 739,828.y (No model.) y

provements in Metal-Working Machines, of

which the following is a specification.

This invention relates, generically,to metalworking machines, and more specifically to automatic screw-making machines ofl that class embodying means whereby'aseries ot screw-rods may be independently operated upon simultaneously by independent tools` having separate and distinct functions and wherein means are provided for automatically presenting each screw-rod of the series after being operated upon by one tool to the action of the next adjacent tool and successively to the remaining tools of the'series, whereby a plurality of screw-rods will undergo separate and distinct operations simultaneously and'whereby after the first com-l plete cycle of operations of the machine one screw will be completed at each successive operation of the tools. p

An object of this inventionis to provide, in connection with the spindle-carrying turret and reciprocatory main tool-carrier,im proved diierential-speed actuating mechanism embodying means for imparting a slow advancing movement to the main tool-carrier and concurrently retaining the turret at rest and for imparting a relatively-rapid retracting movement to the main tool-carrier and simultaneously imparting a rapid rotative movement to the turret, whereby to bring each rod-carrying spindle into position to be operated upon by the next tool ot' the series, which is an improvement of extreme importance in this class of machines, as it materially lessens the time required in the making of screws and analogous articles.

With this object in view the invention consists in certain 'improvements and in oertain novel details inthe construction and .organization of the several parts of the screwmaking machine, as will be hereinafter more fully described, and set forth in the claims.

In the drawings accompanying and forming i a part of this specification, Figure 1 is a plan 1 View of a screw-making machine embodying this invention,`the main tool-carrier being shown in a partially-retracted position. Fig. 2 is a side elevation of the machine looking in the direction of the arrow, Fig. 1. Fig. 3

is a rear elevation, on a larger scale, of the turret, rod-carrying spindles, and a portion of the spindle and turret actuating mechanism, with a portion of the framework of the machine, the spindles being shown in section. Fig. 4: is a right-hand ,side elevation of the parts shown in Fig. 3. Fig. 5 is a side elevation of a portion of the framing, the main tool-carrier, and the, mechanism which directly'controls the rotation of the tools and the rotation of the rod-carrying spindles. Fig. Gis an end view of a portion of the mechanism shown in Fig. 5. Fig. 7 is an end view, partially in section, of the machine as seen from' the left in Figs. 1 and 2, the section beingI taken' on the dotted angular line Ya, Fig. 0,' the turret being shown locked, with the spindles in proper alined, position with relation to the tools, and the turret-rotating sector or fan-wheel being shown out of engagement with the spur-gear of said turret. Fig. 8 is a sectional end view, similar to Fig. 7, of a .portion of the machine, the section being taken on the straight dotted line :1; y, Fig. 9, 'and showing the parts in positions differing from those shown in Fig. 7. Fig. 9 is a plan View of the tu rret-casing detached. Fig. 10 is a plan view, on a large scale, of a portion of the spindle-carrying,turret and main tool-carrier, showing in connection therewith the auXilia ry vertically-movable toolcarrier. Fig. 11 is a side elevation of the parts shown in Fig. 10 looking in the direction of the arrow, Fig. l. Fig. 12 is a plan View of a portion of the turret and main tool-carrier and shows, in connection with the frame, the ada justable stop for gaging the position of the screw-rod. Fig. 13 is a side elevation of the parts shown in Fig. 12. Fig. 14 is a plan view, on a larger scale, of a portion of the machine, including a portion of the dierential-feed mechanism which controls the movements of the turret, main and auxiliary tool-carriers, and certain other parts of the machine. Fig. 15 is a sectional view taken on dotted line w roo COV

w, Fig. 14, looking in the direction of the arrow in said figure. Figs. 16 and 17 are plan and end views, respectively, on an exaggerated scale, of the differential-speed-mechanism clutch. Fig. 18 is an enlarged longitudinal section of one of the screw-rod spindles and the clutches and other controlling devices in connection therewith. Fig. 19 is a side view of the parts shown in Fig. 18. Fig. 20 is a sectional view, on a large scale, of a portion of the main tool-carrier and the screwthreading instrumentalities excluding the die. Fig. 21 is an enlarged cross-sectional view of the parts shown in Fig. 18, taken on the line u u and looking in the direction of the arrow. Fig. 22 is a side view, partly in section, of the parts shown in Fig. 21 as seen from the left in said figure. Fig. 23is an end view of a portion of the die-carrying head as seen from the left in Fig. 20. Fig. 2a is a plan View of a portion of the machine, on an enlarged scale,showinga portion of the screwthreadiug mechanism and also showing the screw-threading-device starter and the means for controlling the movement thereof. Fig. 25 is an end view of the parts shown in Fig. 24, said figure being drawn in projection with Fig. 21. Fig. 26 is a side elevation of a portion of the machine as seen from above in Fig. 1 and showing the devices which control the operation of the rod-spindle clutch. Fig. 27 is a side view, partly in section, on a large scale, of a portion of the turret and main toolcarrier and showing in connection therewith a modiiied form of screw-threading device and means for actuating said device, the toolcarrier being shown in a retracted position; and Fig. 28 is a view similar to Fig. 27 of the same parts, showing the tool-carrier in an advanced position or in the position it occupies after the screw-thread has been formed on the screw-rod and the chasers of the die have been released from said rod.

Similar characters designate like parts in all the figures of the drawings.

` Brieiiy stated, the screw-making machine embodies, in part, the following cooperative instrumentalities, which are so constructed and organized and are so timed in their movements as to automatically produce screws or analogous articles, namely: a main tool-carrier supported for horizont-al reciprocatory movements and including a series of tools, mechanism for independently rotating one or more of said tools intermittently, a workspindle carrier or turret having a horizontal axis and having a series of horizontal spin- `Gld-socketm a series of rod-carrying spindles embodying rod clamping and releasing means andy supported for rotation in said turret, means for rotating said spindles, improved means for intermittently advancing and for limiting the advancing movement of successive screw-rods, dierential-speed actuating mechanism for imparting` slow advancing movements and a relatively-rapid return movement to the main tool-carrier and for imparting rapid step-by-step rotative movements to the turret concurrently with the return movements of said carrier, means alitomatically operative at predetermined points in the orbital movements of the spindles for independently and successively adjusting said spindles to center them successively with respect to a tool or tools of the main tool-carrier, a supplemental tool-carrier supported for movement transversely and longitudinally of the screw-rod, means controlled by the main tool-carrier for advancing and retracting the supplemental tool-carrier concurrently with the advancing and return movements, respectively, of said main toolcarrier, an improved screw-threading device, a screw-threading-device starter disposed in position for imparting an advancing movement to the screw-threading device independent of the movement of the main tool-carrier, and means for actuating said starting device at a predetermined point in the advancing movement of said carrier.

The framework of the machine may be f any suitable construction for carrying the several parts, and in the form shown in the drawings consists of a bed B, composed of suitable side rails and end rails supported on legs in the usual manner, said legs restingon an oil-pan, as in machines of this class.

Supported in ways on the bed B for horizontal movement is the main tool-carrier B', having a series of tool-carrying spindles, as 2, 3, and 4, supported therein and preferably equidistantly disposed about a common center, one 0r more of said tool-spindles having means, as hereinafterdescribed, whereby the same may be rotated.

The rod or work-spindle carrier or turret D, which will be hereinafter referred to simply as the turret or spindle carrier, is shown rotatably supported in a horizontal bearing in a turret-casing 5, shown anged at its base and bolted to the bed B of the machine near the forward end thereof or at the left-hand end of the machine, as shown at Figs. 1 and 2. Formed around and in parallelism with the axis of said turret is a series of sockets or bearings, in each of which is journaled a tubular rod-carrying spindle 6, each spindle being adapted for carrying a screw-rod or piece Aof Work to be' operated upon by the tools of the main tool-carrier, means beingr provided, as hereinafter described, for clamping, releasing, and advancing the screw-rod.

In the drawings (see Figs. 2, 3, 4, 7, 8, 1S, and 19) the turret is shown having four spindles supported for rotation in the turret at equal distances about a common center. These spindles, which may be duplicates of one another, are each furnished with a driven pinion 7, fixed thereto, as shown in Figs. 3 and 4, and are simultaneously rotated by a driving-pinion 8, secured to the forward end of aspindle-actuating shaft E, which shaft is journaled at its forward end in the turret IOZ) IIS

and at its rear end in a bearing 9, forming part of the bed of the machine, said shaft extending through the center of the main tool-carrier (see Fig. 5) and being driven at the proper speed through the medium of the main driving-shaft 10, which is operatively connected to the spindle-actuating shaft by a suitable train of gears G, said driving-shaft being furnished with a pulley, which may loel driven from any suitable source of power.

The spindle-carrier or turret D may be constructed to carry any desired number of spindles, and the main tool-carrier B' may likewise be constructed to carrya corresponding or any desired number of tools, the number of spindles and tools depending of course on the number of operations required to complete the piece of work.

Through mechanism hereinafter described the rod-spindles not only have .a rotative movement about their own axes, but also have intermittent orbital movements about a common center. These intermittent or step-bystep orbital movements are imparted to the rod-spindles for the purpose of bringing the rods carried thereby successively into positions to be operated upon by the successive tools of the main tool-carrier.

In practice the turret D Will be locked in a fixed position and held stationary during the advancing or working movement of the main tool-carrier, and for the purpose of saving time in the operation of forming the screws it is desirable that the main toolearrier shall have a slow advancing movement and a rapid return movement and that the turret D shall have a rapid rotative movement concurrently with the return movement vof the carrierthat is to say, the main tool-carrier and turret shall be so constructed and timedin their movements that the time occupied in the retractive movement of the tool-carrier and the rotative movement of the turret shall be much less than that utilized in the advancing of the tool-carrier or during the operation of the tools upon the rod or While the turret is held stationaryand to accomplish this end there is provided in connection wit-h'the main tool-carrier a turret differential-speed actuating mechanism, (designated as a whole and in a general way byvH, see Figs. 14 and 15,) the construction, organization, and operation of which will be hereinafter fully described.,

The differential-speed-actuating mechanism, (see Figs. 1, 14,15, and 16,) which practically controls the movements of the turret, main tool-carrier, the rod clamping, releasing, and feeding devices, and the supplemental tool-carriers, preferably comprises a camshaft F, journaled in suitable bearings in the framework below the bed B; a fan-wheel or sector 12, fixed to said shaft; a spur-Wheel 13, fixed to the outer end of thc turret D in position Ato be interniittently'engaged and rotated by the fan-wheel; a cam C, carried by the cam-shaft F and having cam faces or straps 14 and 15 in position and adapted for engaging a pin 15', fixed to the base ofthe main tool-carrier, (see Fig. 2;) an intermediate vshaft 16, journaled at its ends in suitable bearings in the framework, preferably above the cam-shaft F; a worm-wheel18, fixed to the cam-shaft; a Worm 19, fixed to the transverse shaft and meshing with said worm- Wheel; two spur-wheels 2O and 21 of different diameters loosely mounted upon the intermediate shaft 16; a supplemental drivingshaft 22, journaled in brackets fixed to the framework of the machine; a pinion 23, Xed to said supplemental shaft 22, near one end thereof, and meshing with the larger gear 20, which is loosely mounted on the intermediate shaft 16; a spur-wheel 24, fixed to the opposite end of said supplemental shaft and meshing with the smaller spur-Wheel 21, which is loosely mounted on the intermediate shaft 16; a clutch C', keyed to the shaft 16 between the two spur-wheels 2O and 21 and adapted for in connection with the supplemental drivingshaft 22, which in the present instance is shown as a train of intermeshing bevel-gears G', one of which is fixed to said supplemental shaft and Ithe other of which is iixed to a power-shaft 25, to which a pulley 26 is secured and which pulley may be driven by a belt by any suitable power shown.

It is not desired to limit this invention to the particular construction and organization of differential-speed actuating mechanism shown inthe accompanying drawings,as these may be modified somewhat without departure from this invention.

The clutch C' is shown (see Figs. 15, 16, and 17) as a pin-clutch of novel construction, hav- -ing pins at opposite ends thereof adapted for engaging pins fixed in the inner adjacent faces of the hubs of the spur-wheels 21, which are loosely mounted on the intermediate shaft 16, the novelty in the construction of this pin-clutch consisting in so supporting the pins that when they strike the pins carried by one or the other spur-wheel hubs said pins will yield laterally and obviate the injurious impact occurring in pin-clutches of ordinary construction. To accomplish this end, one end 27 of the main body 27 of the pin-clutch, which is grooved circumferentially to form a seat for the shifting lever 28, has an annular groove 29 formed in the end face thereof to receive the series of spiral springs 30, preferrecessed portion 27, and the other end of which y spring bears against a pin 32, fixed to a cap IOO IIO

or plate 33, so connected to the portion 27 as to be capable of rotary increment with respect to said parts 27', and which cap 33 has an outwardlyprojecting pin 34 lined thereto in position and adapted for engaging the pin 35, carried on the huh of the loose spuravheel, as will be understood by reference to Figs. 15, 1G, and 17 of the drawings.

The cap or plate 38 may be held in operative relation with the portion 27 of the clutch C in any suitable manner; but in the simplitied organization thereof shown in Figs. 16 and 17 said cap is assumed to be held against displacement With relation to said portion by friction between pins 31 and 32, dueto the endwise thrust or stress of the springs 30 against said pins, as will be readily understood.

As a simple means for actuating the clutch G at predetermined points in the rotative movement of the cam-shaft F a clutch-actuator is provided, which preferably comprises a weighted bell-crank lever pivoted at 3G on a bracket 37, secured to the framework, one arm 28 of which engages in the circumferential groove of the clutch C and the other arm 3S of which extendsinward and terminates at a point above the camshaft F at the rear end of the machine, a cam 40, fixed to said cam-shaft and having two actuatingabutments 41 and 42, respectively, the one '4l of which is so located ou the cam 40 as to strike the arm of the clutchactuator and shift the clutch into engagement with the spur-wheel 21'to effect a rapid rotation of the worm 19 and cam-shaft F immediately after the tools of the main tool-carrier have completed their operation, and thus impart a quick return movement to said carrier and a quick rotative movement to the turret. (See Figs. 14 and 15.) The clutch-actuator also embodies a curved supplemental lever 43, which is pivotally supported at one side of the arln 3S and has one end thereof in position to be actuated by the abutment 42 of the cam 40 and has its opposite end in position to engage a projection on and impart an opposite camshiftiug movement to the arm 38 of the bellcrank lever of the clutch-actuator When said lever 43 is actuated by the abutment 42 and is thrown outward thereby. (See Fig. 14.) In other Words, the arm 38 of the bell-crank lever and the lower end of the lever 43 are normally in eiective engagement and are reciprocally operative for actuating each other, whereby their cam-engaging ends Will be brought alternately into operative relation with the cam- abutments 41 and 42, respectively. On the operation of the arm 38 by the cam-abutment the clutch C/ will be shifted into effective engagement with the high-speed gear 2l and the abutment-engaging end of the lever 43 will concurrently be thrown into position to be acted upon by the abutment 42, the Weight 44 acceleratingr the movement of these parts, anden the actuation of the lever 43 by the abutment 42 of the cam 40 the opvat 45.

posite end of said lever striking the vprojection on the arm 3S forces this arm with its non-Weighted end into position to be operated bythe abutment 41 of said cam and at the same time shifts the clutch C into effective engage ment with the low-speed gear 20, thus impart ing, through the medium of the Worm 19 and worm-wheel 18, a slow movement to the camshaft and a corresponding slow movement to the main toolcarrier, the fan Wheel 12, which actnates the turret, being during this slow movement of the carrier out of engage ment with the spur-wheel 13, and the turret is held stationary by means which will be hereinafter more fully described.

In practice (see Fig. l5) the abutments 4l and 42 will be so disposed circumferentially with respect to each other on the cam 40 that theclutch C' will be held in operative engagement with the low-speed gear 20 for about four-fifths of a complete rotation ot' the camshaft F, so that the time required for returning the tools to their normal ineffective position will be about one-fifth of that utib ized in the operation of said tools.

To correct any misalinement or disarrangement of the rod-spindles with relation to the tool or tools which are to operate on the rod, which may result from various causes, as by one spindle Wearing more than another, distortion of the spindle or spindle-carrier due to atmospheric intlnences or bythe springing or warping of the framework, dac., there is provided in operative connection with the turret and operative independent of the turret-rotating means proper spindle-adjusting mechanism automatically operative for shifting the turret rotatably and in a direction contrary to the direction in which said turret is rotated by the diHerential-speed-actuating mechanism after each intermittent rotary movement thereof to bring the spindles successively to an accurate Working or alined position with relation to a tool and for locking the turret after the spindle is in a true adjusted position.

The means for shifting the turret, as'above described, to adjust the spindles to correct working position and also for temporarily locking said turret in this adjusted position is shown comprising (see Figs. '7 and 8) tWo cooperative stop members s and s' and a turret shifting and locking member r. One of said stop members, as s, is shown as a screw adjustably seated in a bearing formed in a transverse shouldered portion, being formed by recessing the periphery of said turret, as The head of the stop member s (which stop member will for convenience be termed a stop-abutment) is extended beyond the face ofthe shouldered portion 45 in position to cooperate with the other stop member s. This other stop member s is shown as a reciprocatory member, herein termeda stop, supported in a horizontal bearing 46 on the turret-casing and is furnished With a spring for projecting the same into the path of-the TOO stop-abutment s concurrently with the arrival of the stop-recess 45 adjacent said stop receiving recesses being perfectly equidis-v tantly disposed about the peripheryjof the turret. The two stop members s and s Will determine the working position of each spindle, the stop s being adjusted in or out, as required, to determine the extent of the rotary adjustment of theturret, and consequently the Working position of each spindle.

The turret shifting or locking member r is shown in the nature of a bolt seated for longitudinal movement in a bearing 47, extending outward from that side of the turret-casing opposite to that on which the bearing 46 is formed and having a wedged-shaped or beveled inner end which cooperates with a beveled portion of a lock-notch formed in the periphery of the turret. Each lock-notch, there being four shown, is disposed', prefererably, central between two rod-spindles and are of considerably greater Width inv the direction of rotation of the turret than is, the wedge portion of the turret shifting and locking bolt r, for various reasons.

As will be understood by reference to Figs. 7, 8, and 9, the series of lock-notches of the turret and the series of recesses 45 are not disposed exactly opposite to each other, but are located, respectively, at different points in the length of the turret.

As a means for actuating the turret-shifting bolt and for preventing an advancing movement of said bolt until the stop s/ is in an advanced position there is provided boltactuating means which consist, preferably, of a bolt-retracting lever 4S, pivoted intermediate its ends on the framework and having the lower end thereof extending over the cam-shaft F, a disk or plate 49, fixed to the cam-shaft F, a spring 50, secured to the upper end of the lever 4S and exerting a boltadvancing stress, and two cam- faced leveractuating members 51 and 52, carried on the disk 49 in position for actuating said lever and for holding the same in a retracted position the proper length of time.

In operation the bolt r is first released from the turret and the turret is shifted by the cam-wheel or sectorto bring the spindles into approximate working position, the stop-abutment then being in position to engage the stop s', which is at this time in the position shown in Fig. 7, after which the bolt r is advanced by the spring and its wedged portion engages the cooperative wedge face of t-he locknotch, which shifts the turretv in a reverse direction until the stop -abutment tightly engages the stop, which stop and bolt prevent further movement of the turret in either direction.

Each rod-spindle (see Figs. 1S to 2l, inclusive) preferably comprises in part a rotary chuck-sleeve 52, supported inthe turrets and having at the inner working end thereof an internally-flared chuck-compressing head 53 and a compressible -collet or chuck 54, snpported for reciprocatory movement within said sleeve, and having a tapered face coperative with the internal face of the head 53, whereby the same is compressed to clamp the rod.

Asa means for actuating the chuck to clamp the rod R there is provided chuckactuating means shown consisting of a tubular thrust member 55, supported for reciprocatory movement in the sleeve 52, with, its outward end in position for engaging the innerend of the'chuck, whereby to advance the same to its clamping position, and having at the opposite end thereof a collar, a pair of thrust-rod-actuating fingers 56 and 56', pivotally supported on arms fixed to a collar 57, secured to this end of the sleeve 52, each the inner ends of the fingers 56 and 56' and' which is adapted for spreading the ends to impart a forward movement to the thrust member, an actuating-lever 6l, pivoted on the framework (see Fig. 2) and having a piu at the upper end thereof adapted to enterthe groove in the collar 60 when this collar during the rotative movement of the turret arrives in cooperative relation with the lever, and a cam C2, fixed to the cam-shaft and having straps so constructed and arranged as to engage a pin 6l on and impart chuck opening and closing movements to the thrust member 55 immediately preceding and succeeding, respectively, the advancing movement of the rod R, which advancing movement of said rod is effected by means hereinafter described. This means for feeding or advancing the screw-rod preferably consist of a clamp-sleeve 62, supported within the tubular thrust member 55 and having at the outer end thereof a groove-head 66, a clamp-sleeve actuator shown as consisting of a series of a pivotally-supported parallel- motion levers 64, 65, and 66, the one 64 of which has a pin at the upper end thereof in position to enter the groove in the head 63 of the clamp-sleeve,

as shown in Fig. 2, when the spindle of this' clamp-sleeve arrives in a rod-feeding position, and cam-straps fixed to the cam C2 and so disposed as to impart a rod-advancing movement to the clamp-sleeve immediately upon the release of said rod by the chuck 54 and for retracting said sleeve immediately after the chuck reclamps said rod.

In some cases, as when the threading de- IOO IIO

vice shown in Figs. l, 2, and 2O is used, it is desirable to hold the rod stationary during the threading operation, and to accomplish this there is provided in connection with each spindle a friction-clutch C3, which in the preferred form thereof shown (see Figs. 18 and 2l) comprisesa recessed driving clutch member G7, preferably formed integral with the pinion 7, loosely mounted on a collar 68, fixed to the sleeve 52 of the spindle; a sleeve-like driven clutch member 70, splined to the collar 68; two expansile ringsections orsprings G9 and 69, concentrically disposed about the innerend of the member 70, within the recess of the driving member 67, and two levers 7l and 72,having cam-like working faces disposed between adjacent ends of and in position to expand the ring-sections G9 and 69, the inner working end of said levers being pivoted to the driven member 70, as indicated in Figs. 2l and 22, andthe outer ends thereof being normally extended beyond the forward face of the member 67 in position to be pressed inward by an actuator (37', splined for longitudinal movement upon the collar (i8, and which actuator normally is held closely against the free ends of the ring-expanding levers by spiral springs 73, thus normally retaining the levers in ring-expanding position, said springs abutting at their inner ends against the actuator (whichjs shown as a ianged collar) and at their outer ends against a iiange 74 upon the collar 68. The springs 73, through the actuator G7', levers 7l and 72, and ring- sections 69 and 69, normally elfect a clutched engagement between the driving and driven clutch members and cause the spindle normally to be rotated.

As a means for retracting the actuator 67 to release the two clutch members G7 and 70 automatically to stop the rotation of the spindle at the proper point in its orbital mov'ement, there is provided a clutch-releasing device, which in the form thereof shown in Figs. 2 and 26 comprises a lever 75, pivoted intermediate its ends on a bracket 76 and having at one end a pin or projection normally disposed in position to engage the, inner face of the actuator 67' when'the spindle arrives in coperative relation with the screwthreading device, and a lever 77, pivotally supported intermediate its ends on the frame and having its upper end in operative engagement with a crank-arm 78, ixed tothe pivot of the lever and having at its lower end a pin in position to be operated by camstraps on the cam. C2, whereby at the proper moment in the rotation of said cam an actuator-retracting movement will be imparted to the lever 75, a stop or projection (not shown) on the outer face of the actuator 67 being thereby brought into position to engage a stop-abutment (not shown) which is fixed to the bracket and arrests the continued rotation of the rod-spindle until the lever 75 is returned to its normal position, which return movement is eifectcd by the eounterweight at the cud of said lever 75 when the cam C2 has arrived at the proper position to permit such movement.

The screw-threading device shown in Figs. l, 2, and 2O comprises a die-stock or toolcarrying spindle 2, seated for reciprocatory movement in a sleeve 80, journaled for rotation in a horizontal socket in the main toolcarrier B and havingv a pinion 81, which meshes with a gear 82, (see Figs. 6 and 20,) fixed to the spindle-actuating shaft E, apinclutch comprising two members 83 and 84, the one 83 of which is carried at the forward end of the sleeve 8O and the other 84 of which is carried at the forward end of the spindle or die-stock 2 and each of which has pins which on the forward movement of the main tool-carrier engage each other and cause the spindle to rotate with the sleeve, a socket (see Fig. 20) being formed in the clutch member 8i of the spindle 2 to receive the shank or stem ofthe die.

On the retractive movement of the main tool-carrier after the thread is formed the rod R, which was held stationary during the threading operation, is rotated to screw off the threading-die, the clutch members during this retractive movement of said carrier being sepa-rated, so that tlie spindle 2 may be held against rotation by means hereinafter described.

In connection with the spindle 2 there is provided a retracting device operative on the release of the screw-threading die from the rod for imparting a quick return movement to said spindle. This consists of a spiral spring 84@ surrounding the rear end of the spindle and bearing at its forward end against aiixture on the tool-carrier and at its rearward end against a bar 85, fixed to the rear end of said spindle. pins 86 disposed to engage a yieldable stop member 87, secured to the tool-carrier at a predetermined point in the retractive movement of the main tool-carrier, or at that point in the retracted movement of said carrier when the clutch-pins are released, thus acting to hold the spindle against rotation until the die is released from the rod, al'ter which the spring 84C imparts a quick return movement to said spindle.

In Fig. 1 of the drawings the die-stock or spindle 2 is shown furnished with an ordinary screw-threading die of the box type.

In Figs. 27 and 28, which illustrate a modified form of screw-threading device, the diestock or spindle 2 is shown furnished with a head 88, having a series of chasers 89, pivotallysupported for radial movement in longitudinal grooves formed in said head and having their rear ends extendcdsomewhat beyond the rear face of said head 88, and as a means for actuating the chasers a collar 90 is mounted upon the spindle 2 and has a conical outer end to cooperate with the adjacent ends of said chasers on a longitudinal movement of said collar, whereby to spread This bar has a set of projecting.

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these ends and closeV the chasers on the end of the screw-rod. The means for imparting a'chaser closing and opening movement to the collar 90 in the form of device illustrated in Fig. 28 consists of two pivotally-supported arms 91 and 92, respectively, the lower free ends of which engage opposite ends, respectively, of the collar, said arms being pivotally carried at their upper ends on a bracket 93, fixed to the main tool-carrier. These arms 91 and 92 are alternately operated during the retractive and advancing movement of the main tool-carrier by means of pins 94 and 95, adjustably secured to a bar 96, fixed to the turret-casing 5, the pin 94 being so located as to engage the pivoted arm 91 at a predetermined point in the retractive movement of the toolcarrier 'to effect a chaserclosing movement of the collar 90, and the pin 95 being so located on the bar 96 as to strike the arm 92 and effect a Chaser-opening movement of the collar 90 at a predetermined point inl the advancing movement of said carrier. Vhen this form of screw-threading device is employed, the spindle 2 will be held against rotative movement during the screw-threading operation, While screw-rod R will' be rotated,and for this purpose a collar 97 is shown liXed to the spindle and provided with a pin which enters a hole in the main tool-carrier. (See Fig; 27.)

As a means for starting the screw-threading die upon the end of the rod after said die has arrived by the advancing movement of the main tool-carrier in cooperative relation with said rod, there is provided a starting device, (designated in a general way by S,) consisting of a crank-arm 98, fixed to a crankshaft journaled in a Vert-ical bearing on a bracket 99, fixed to the base of the main toolcarrier, and which shaft has at the lower end thereof another crank-arm 98', disposed substantially at right angles to the arm 98; a thrust-pin 100, adj ustably secured in a bearing at the free end of the crank-arm 98, with its forward end in alinement with and in position to strike the outer reduced end of the die-spindle 2; an abutment 101, adjustably seated in a bearing in the free end of the lower crank-arm 102, fixed at one end to a projection on the starting device and at its opposite end to a fixture of the main carrier and adapted for normally retaining the starting device with the thrust-pin thereof out of engagement with the spindle 2, and a starting-device actuator 103, fixed to the bed of the machine in the path of movement of the working end of the abutment 101 and adapted at a predetermined point in the advancing movement ofthe main carrier for effecting a die-starting movement of the starting device, as will be readily understood by reference to Figs. 1, 24, and 25 of the drawings.

In addition to the main tool-carrier, which is supported for movement longitudinally of the machine, there is provided a supplemental tool-carrier, (designated by T,) which is located above and at one side of the rod-spindleactuating shaft E and which is constructed and organized for adjustment toward and from the turret and for movementsin aplane intersecting the axis of said shaft E.v This tool-carrier T comprises a slide-rest su pported on horizontal ways on a bracket 104, fixed to the turret-casing 5, (see Figs. 2, 10, and 11,) and a tool-carrying slidewhich constitutes the tool-carrier proper, mounted on said sliderest for vertical movement, said slide` being located bet-Ween the turret and mai-n tool-carrier and in such position that the tool carried thereby may operate upon the screw-rod of one of the spindles, means, such as shown at 105, being provided for adjusting the sliderest horizontally.

As a means for advancing and retracting the tool-carrying slide concurrently with the forward and backward movement of the main tool-carrier, there is provided aslide-actuator which, in the form shown in said Figs. 2, 10, and 11, consists of two horizontally-disposed cam-straps 106 and 107, located one above the other, and one of which straps, as 107, has a cam-face 107', which cooperates with a projection on the slide and effects, on the advancing movement of the main tool-carrier, an advancing movement of said slide, and the other of which, as 106;'has a cam-face 106 disposed in proper position for engaging another projection on the tool-slide at a proper point in the retractive movement of the main tool-carrier for imparting an upward or retractive movement to said slide, these camstraps 106 and 107 being xed at one end to an upright 108, secured to the main tool-carrier, as illustrated in these figures.

In addition to the main and supplemental tool-carriers the machine is preferably provided with two horizontally-movable tool-carriers, mounted, respectively, on the opposite side rails of the bed of the machine in position to operate upon the rods of the two lowermost spindles. These carriers, which are designated by L and Ll, may be furnished one with a turningdown tool and the other with a cut-off tool, and the tool-carrier T may be furnished with a nurling-tool. The two toolcarriers L and L will be actuated by camst-raps on a cam C4, fixed to the cam-shaft F, through the medium of levers 109 and 110, pivotally supported on the bed of the machine and connected at their upper ends to the tool-carriers L and L', respectively, as will be readily understood.

For a more complete description of the friction-clutch herein described in connection with the rod-spindle and the pin-clutch herein described in connection with the differentialspeed actuating mechanism reference may be had to the applications serially numbered 739,775 and 739,776, respectively, filed concurrently with this application.

It is distinctly to be understood that the present application is not limited to any particular kind of clutch devices, as any suitable IOO IIO

form of clutch may be employed in connection with the ditterential-specd actuating mechanism or with the rod-spindles.

le claiml. A metal-working machine embodying a bed; a tool-carrier shiftably supported on said bed; a turret supported for rotative movement; and differential-speed actuating mechanism in operative connection with the tool-carrier and turret and adapted for imparting slow advance and quick return movements to said carrier, and for imparting quick rotative movements to the turret concurrently with the quick return movements of said carrier.

2. A metal-working machine embodying a turret supported for rotative movements; a tool-carrier supported for movements toward and from said turret; differential-speed actuating mechanism in operative connection with the turret and carrier and etective for imparting quick rotative and quick return movements, concurrently, to the turret and carrier, respectively, and for imparting a relatively-slow advancing movement to said carrier; and means for holding the turret at rest during the slow advancing movement of said carrier.

3. The combination with a carrier and a turret, supported for reciprocatory and rotative movements, respectively, of differentialspeed actuating mechanism in operative connection with said carrier and turret and embodying instrumcntalities imparting, alternately, slow advancing and quick return movements to said carrier and also for imparting quick step-by-step rotative movements to the turret. concurrently with the quick return movements of the carrier; and automatically operative means Jfor locking the turret concurrently with the arrival of the carrier at the end of its'retractive movement and for holding the same against rotative movement during the entire advancing movement of said carrier.

Lt. In a metal-workingmachine, the combination with a rotative turret and a reciprocatory tool-carrier; of differential-speed actuating mechanism embodying a high-speed train ot gears and alow-speed train of gears; automatically operative means for effecting an operative connection between the turret, carrier and high-speed train ot gears concurrently, whereby simultaneously to impart quick rotative and quick return movements to the turret and carrier, respectively, and alternately for effecting an operative connection between the low-speed train and said carrier; and means for holding the turret at rest while'the carrier is being operated through the low-speed train.

5. The combination of a rotative turret; a reciprocatory carrier; differential-speed actuating mechanism embodying a high-speed and a low-speed train of gears the latter of which is intermittently effective for imparting a slow advancing movement to the carrier and the former ot' which is intermittently effective for imparting concurrent quick rotative and quick return movements to the turret and carrier, respectively; and automatically-operative means for locking the turret against movement during the slow advancing movement ot the carrier.

o'. In a metal-working machine, the combination of a rcciprocatory carrier; a rotative turret; carrier and turret actuating mechanisms including high and low speed devices alternately and automatically operating the carrier, and the high-speed device of which is automatically effective forconcurrently operating both the carrier and turret; and means for holding the turret at rest during the operation of the low-speed device.

7. The combination with a work-holder, and with a tool-carrier supported for reciprocatory movements, of a tool-holder supported in said carrier for movements independent ot said carrier; means for advancing and retracting said carrier; and a starting device operative at a predetermined point in the advancing movement of said carrier for imparting an independent advancing movement to the tool-holder with relation to said carrier.

S. A screwmaking machine embodying a turret; a tool-carrier; a screw-threading device supported in said carrier for independent movements; means for im parting rotative movements to the turret and for advancing and retracting the carrier; rod-spindles supported in said turret; rotating mechanism for said rod-spindles; and a starting device operable at a predetermined point in1the ad vancing movement ot the carrier for imparting an advancing movement to said screwthreadingdevice independent of the tool-carrier.

9. In a screw-making machine, a reciprocatory tool-carrier, in combination with a screwthreading device supported in said carrier for independent longitudinal movement; a starting device pivotally supported on a part of said carrier and having an arm in operative relation with the rear end ofthe screw-threading device; a starting-device actuator supported on the frame or bed of the machine in the path of the starting device and adapted at a predetermined point in the advancing movement of the carrier for actuating said starting device to impart a slight advancing movement to the screw-threading device with relation to said carrier.

lO. A metal-working machine embodying a multispindle turret supported for rotative movements; a tool-carrier supported for rcciprocatory movements; differential speed actuating mechanism in operative connection with the turret and carrier and effective intermittently for imparting concurrent quick rotative and quick return movements to the turret and carrier respectively, and for imparting a relatively-slow advancing movement to the carrier alternately with said quick return movements; automatically-op- IOO IXO

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erative looking means for holding the turret at rest during the advancing movement of the carrier; a plurality of rod-carrying spindles 5 a plurality of clutches in connection one with each spindle and embodying a driving and a driven member the latter of Which is fixed to the spindle; resilient means normally for holding the clutch members in locked engagement; rotating means for the drivingxo clutch member; clutch-releasing means disposed in the orbital path of the clutch members; and automatic means fior operating the clutch releasing means at a predetermined point in the orbital movement of the spindles.

Signed by us at Hartford, Hartford county, 15

Connecticut, this 7 th day of December, A. D. 1899.

REINHOLD HAKEWESSELL. EDWIN C. HENN. Witnesses:

L. H. BLOOD, E. O. WHITNEY.

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