US612154A

US612154A - Turret mechanism

Info

Publication number: US612154A
Authority: US
Publication date: 1898-10-11
Anticipated expiration: 1915-10-11

Description

No. 612,154. Patented Oct. ll, I898. L. H. BLOOD.

TURRET MECHANISM.

(Application filed Feb. a, 1398.

2 Sheets-Sheet I.

(No Model.)

L lazuli. H 157000 THE Monms PETERS co P'HoYo-Lm-m WASHINGTON. u c

N0. 6|2,|54. Patented Oct. ,1898. L.-H. BLOOD.

TURRET MECHANISM.

(Application filed Feb. 3, 1898.) (No Model.) 2 Sheets-Sheet 2 Witnessew: have tonf 01649 1151000,. OiLM/M fly id? Jarzzqy m: Noam Pafzns co. PHOfO-LIYNO.. wAsHmaTom B4 c.

UNITED "STATES PATENT FFICE.

LOUIS H. BLOOD, OF HARTFORD, CONNEOTIOUT.

TURRET MECHANISM.

SPECIFICATION forming part of Letters IPatent No. 612,154, dated October 11, 1898. A pli ation fil d February 3, 1898. Serial No. 669,013. (No model.)

To all whom it may concern.-

Be it known that I, LOUIS H. BLOOD, a citizen of the United States, residing in Hartford, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in TurretMechanisms, of which the following is a specification.

This invention relates to turret mechanism for lathes, screw-making machines, &c., one object thereof being to provide an improved turret mechanism comprehending instrumentalities whereby the turret-slide maybe retracted and the turret unlocked and rotated at one operation by an actuator constituting part of the turret mechanism and whereby on another movement of said-actuator the turret and locking means may be advanced to a working position.

A further object of the invention is to provide in connection with a turret and its support a sliding bolt for locking the turret, a shiftable device carried by said bolt for rotating said turret, and means for reciprocating the bolt.

A further object of the invention is to provide an improved turret mechanism comprehending a turret-slide, a turret rotatably mounted on said slide and including a circuit of concentrically-disposed stop-faces, a bolt supported for reciprocatory movement on the slide at one side the axis of the turretand in position to engage the stop-faces on successive rotative movements of said turret, a pawl pivotally mounted on the bolt and adapted at a predetermined point in one movement thereof to engage a fixture on the turret and to rotate the same a distance equal to the length of the are between the stop-faces, and an actuator shiftably connecting the bolt and slide and effective for firstimpartinga reciprocatory movement to said bolt and slide one in advance of the other and then imparting a unitary reciprocatory movement to said bolt and slide.

In the drawings accompanying and forming part of this specification, Figure 1 is a plan view of a portion of a metal-working machine-a lathe, for instance-furnished with my improved turret mechanism, said figure showing a portion of the bed or frame of the machine; a turret-slide carrier; a turret-slide; a turret, and turret locking, rotating, and reciprocating instrumentalities, the turret-locking bolt being shown in dotted lines in its turret-locking position, and the turret-slide being shown in its normal retracted position and in position to be ad vanced by the bolt-actuating device. Fig. 2 is a central vertical section of the turret mechanism, taken on a line corresponding with the dotted line a a, Fig. 1. Fig. 3 is avertical cross-section of the turret mechanism, taken on the dotted lineb b, Fig. 1, and showing the parts at the left of said line. Fig. 4. is a central longitudinal vertical section similar to Fig. 2 of a portion of the turret mechanism, showing the turret-slide and turretl ocking bolt locked together for unitary advancing movements. Fig. 5 is a horizontal section taken on a line corresponding with the dotted line 0 c, Fig. 2, partially in elevation, of the turret mechanism, showing the parts in the positions thereof illustrated in Figs. 1 and 2, a portion of the turret and turret-slide being broken away. Figs. 6 and '7 are horizontal sectional views similar to Fig.

5 of a portion of the turret mechanism, showing, respectively, two successive positions of the turret-locking device, turret-rotating device, and turret-stop device during a retractive movement of the locking device. Fig. 8 is a similar sectional view of a portion of the turret, showing in plan view the position of the turret-rotating pawl durin g the first stage of the advancing movement of the turretlocking bolt. Figs. 9 and 10 are side and plan views, respectively, of the turret-lock ing bolt and turret-rotating pawl carried thereby; and Fig. 11 is a horizontal sectional view similar to Fig. 6 of a portion of the turret mechanism and showing a slightlymodified form of stop device for the turret.

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

In the drawings only so much of a metalworking machine is shown as is considered necessary fully to illustrate the application and mode of operation of the several elements comprised in my improved turret mechanism.

Inasmuch as the turret mechanism constituting the subject-matter of my present invention is applicable to various kinds of machines, and inasmuch as the construction and organization of the constituent elements of said mechanism may be variously modified to adapt the same to various kinds of machines within the scope and limits of my pres ent invention, it is distinctly to be understood that this invention is not limited to the combination of turret mechanism herein described with any particular kind of machine, nor is it limited to the particular construction and organization of turret mechanism illustrated in the accompanying drawings.

The turret mechanism in the preferred construction and organization thereof illustrated in the accompanying drawings comprises, essentially, a turret-slide (designated in a general way by S) which may be sup ported in any usual or suitable manner on a carriage C, mounted on a bed B of the supporting-frame of themachine proper, a turret (designated in a general way by T) piv-- otally or rotatably supported on the turretslide S and having a circuit of concentricallydisposed stop-faces or lock-notches, a turretlocking device L, supported for reciprocatory movement on the turret-slide at one side of the axis of rotation of the turret and in position to successively engage the successive stop-faces of the turret, a reciprocatory turret-rotating device R, operable with the looking device for engaging a fixture of and for imparting a rotative movement to the turret, and an actuator (designated in a general way by M) cooperatively connecting the turretslide and locking device.

The turret-slide, which may be of any suitable general construction adapted for supporting other elements of the turret mechanism, is shown of oblong form and is supported between

guides

2 and 2 in a guideway on the carriage O, as hereinafter more fully described.

The turret T, which may be of any desired construction, is shown having a tubular recessed base portion 4-, the recess being of a depth and a sufficient diameter for inclosing and facilitating the operation of certain parts hereinafter described. This turret is shown pivotally supported on the turret-slide by means of a conical sleeve 5, extending through a conical central bore in the turret and resting at its lower end upon the upper face of the slide, and a headed stud 6, extending through a vertical opening in the turretslide and through the sleeve 5, said parts being clamped together by a nut 7 screwed upon a diametrically-reduced upper portion of the stud 6, this pivotal connection being shown of a construction common to supports of ordinary turrets.

Secured in the recess 4 of the turret is a stop-ring 8, having arseries orcircuit of equidistantly-disposed transverse stop-faceformative notches 9, formed in the lower face thereof, said stop-notches being shown as six in number and concentric to the axis of the turret.

As a means for facilitating rotative move ments of the turret said turret is furnished with what may be consistently termed a ratchet device, said ratchet device comprising in the form thereof shown in the accompanying drawings a series or circuit of six equidistantly-disposed ratchet teeth or pins 10, depending into the recessed portion 4 of the turret, said pins being concentrically disposed about the axis of said turret, with their lower faces in a horizontal plane somewhat above the upper walls of the stop-notches 9, said ratchet-teeth being adapted to be engaged by a pawl, as hereinafter described.

As in turrets of ordinary construction, the turret illustrated in the accompanying drawings is shown having a series of radial toolsockets 12 and tool-holding devices 13, which may be of any suitable character.

As a means for locking, unlocking, and imparting rotative movements to the turret I have provided in operative connection with the turret-slide a unitary turret locking, unlocking, and rotating device comprehending a reciprocatory turret-locking bolt or device, a reciprocatory turret-rotating pawl or device, and an actuator in operative connection with the turret-locking bolt.

In the preferred construction and organization thereof illustrated most clearly in Figs. 2, 3, and 5 of the drawings the turret locking, unlocking, and rotative device comprises a turret-boltL, supported for reciprocatory movement in a guideway 14: in the turret-slide S, a turret-rotating pawl R, pivotally mounted on the bolt L, near the forward end thereof, and means, hereinafter described, for reciprocating the bolt. This turret-locking bolt is shown of oblong construc tion and has a wedge-shaped locking portion 15 at the extreme forward end thereof, which projects upward above the upper face of the main portion of said bolt. This bolt is supported in the guideway 14: of the slide S at one side the axis of rotation of the turret and has the upper face of the main portion thereof flush or substantially flush with said turret-slide.

The turret-rotating pawl or device R is shown pivotally supported at 16 on the upper face of the turret-locking bolt L within the recessed portion 14 of the turret-slide and with its forward end slightly in the rear of the locking portion 15 of said .bolt,.said pawl being shown of a width substantially equal to the width of the bolt and being normally disposed with its side face flush with the side face of said bolt. This pawl consists of a main body portion 17, seated in a recessed portion 17 of the bolt, with its upperface preferably flush with the upper face of said bolt and having an upwardly extending ratchet-tooth-engaging portion 18, the forward side face of which is inclined, as shown at 18, and serves to effect a transverse movement of the pawl when the forward end of said pawl strikes a ratchet-tooth during the advancing movement of the bolt L, and thereby permits the same to readily pass said ratchet-tooth.

1 In the form thereof shown in the accompanying drawings the ratchet tooth or pin engaging face 19 of the pawl is shown concaved to correspond to the contour of the ratchet-tooth and is of sufficient length to extend substantially around one-half the circumference of said tooth. This pawl is also furnished at the underside, near the forward end thereof, with an offset portion or abutment 20, and the turret-slide is shown furnishedwith a stop or projection 21, disposed in position to engage the offset portion or abutment 20 of said pawl during the advancing movement of the bolt, and when the pawl is in the position illustrated in Fig. 8 of the drawings said projection 21 serves to return the pawl after the same has passed a ratchet-tooth to the tooth-engaging position thereof shown in Fig. 5.

For the purpose of guiding the turret-locking bolt L and for retarding the retractive or unlocking movement of said bolt the guideway let of the turret-slide is shown tapered, the forward end being of less width than the rearward end thereof, and the bolt L is supported between the adjacent parallel faces of two elongated tapered retarding devices or guides 23 and 24:, interposed between the outer faces of said bolt and the opposite tapered faces of the guideway, said guides being held in frictional engagement with the opposite faces of the bolt, preferably by means of

spiral springs

25 and 26, interposed between the inner ends of said guides and a portion of the slide S, the slide being recessed at 27 to receive said springs, as shown most clearly in Fig. 5 of the drawings. These springs force the guides .23 and 24 forward and into tight engagement with the opposite faces of the bolt-lock, the advancing and transverse movements of the guides being preferably limited by

stop abutments

28 and 29, (shown as screw bolts,) extending through the forward end of the slide S and bearing at theirinnerends against the forward ends of the

guides

23 and 24, respectively.

In connection with the sliding bolt L, I have provided a resistance or reactionary device which in the form thereof shown in the accompanying drawings is in the nature of a spiral-spring 30, seated in a horizontal recess 31 in the slide S and bearing at the forward end' thereof against the rear end of the bolt and at the opposite end against an adjustable tension device 32, (shown as a screw,) extending into the recess 31 at the extreme rear end of the slide S.

As a means for imparting a reciprocatory movement to the bolt and the slide, one in the advance of the other, I have provided a bolt-actuator M, which in the form thereof shown in the accompanying drawings comprises a lever 33, pivotally connected at its rear end to a link 34, which in turn is pivot- S being of a length substantially coincidingv with the working stroke of the turret-locking bolt L and permitting a turret-lockingmovement of said bolt in advance of the slide.

The construction and organizations of the bolt L, slide'S, and actuator M are such that when the actuating-lever M is shifted from the position indicated by the dotted line wto the position indicated by the full and dotted lines at y, Fig. 5, the bolt L and connected turret-rotating pawl will be shifted from the fully retracted position (shown in Fig. 7 first to the position thereof shown in Fig. 8 and then to the turret-locking position, (shown in Fig. 5,) the slide during this movement of the turret not having any advancing movement imparted thereto. On the continued advance of the actuating-lever 33 from the position indicated by y to the position thereof indicated by dotted line .2, Fig.5, the turretslide, turret, and parts carried thereby will be advanced unitarily.

As it is necessary that the slide shall be retracted to the normal position thereof shown in Fig. 5 before "an independent retractive movement is imparted to the turret-locking bolt, I have provided in operative relation with the slide and turret-bolt a locking de- Viee,which is designated in a general way by L and which is adapted at the end of the independent advancing movement of the bolt for locking the bolt and the slide together, so they will move in unison, and for holding said bolt and slide in fixed connection until the slide during the unitary retractive movement of the bolt and slide has arrived at the end of its retractive stroke, at which time the looking device will be released to permit the continued retractivemovement of the bolt independent of said slide. This locking device in the preferred form thereof shown most clearly in Figs. 2, 3, and 4: of the drawings comprises a gravitative latch or lever 10, pivotally supported at 41 on the slide in a recess formed in the under face of said slide S, near the forward end thereof, and having a projection or catch 42, disposed in posit-ion to enter a lock-notch 43, formed in the lower face of the bolt-actuating member 38,near the forward end thereof, when said member is in the turret-lockingposition shown in Figs. 2 and 5.

For the purpose of actuating the locking device L to shift the same into locked engagement with the lock-actuating bar at a predetermined point in the advancing movement of the bolt and for positively disengag- IIO ing the locking device from said bar at a predetermined point in the retractive movement of the slide the forward end of the lockinglever 40 has, preferably, two parallel inclined faces 44 and 45, one of which cooperates with the forward beveled end of a latch-lifting member 46, supported on the carriage or frame C below the slide S and in the path of movement of the forward end of the latch, said latch-lifting member being of a length equal to the length of the advancing movement of the slide and constituting a track on which the lower portion 47 of the latch travels during the advancing and retracting movements of the slide, and which track retains the latch during such movement in locked engagement with the bolt-actuating member 38, the opposite inclined face 45 of the latch cooperating with a pin or projection 4S,dispose'd in the rear end of the latch-lifting member 46, which pin is located in the path of retractive movement of the latch and in position to engage the inclined face 45 on the arrival of the slide near the end of its retractive stroke to thereby disengage the latch fromthe bolt-actuating bar 38 and facilitate a continued re tractive movement of the bar and connected bolt independently of said slide.

As a means for arresting the slide S on the release of the latch or locking device L from the bar 38 I have provided a stop-abutment 49, disposed in position on the carriage O to engage the forward face of the catch 42 of the latch L immediately upon the withdrawal of said catch from the lock-notch 43 in said bar 38.

From the foregoing it will be seen that'when the turret-locking bolt has arrived at the end of its locKing stroKe, or in'the position thereof shown in Figs. 1, 2, and 5, a continued advancing movement of the bolt-the slide S then advancing with said bolt-will cause the inclined face 44 of the latch L to ride upward over the rear end of the member 46, which will throw the latch into locked engagement with the forward end of the bar 38 and will hora said latch in the position shown in Fig. 4 throughout the advancing and retracting movements of the slide, said latch being released immediately upon the arrival of the slide at the fully-retracted position thereof shown in said Figs. 1, 2, and 5 and allowing a limited range of advancing and retracting movements of the bolt independent of said slide.

For the purposeof interrupting successive intermittent rotative movements of the turret and holding the same against accidental movement when the bolt is out of locked engagement with said turret and also positively limiting the retractive movement of the bolt I have provided in operative relationwith the turret, bolt, and slide a stop device which in the preferred form thereof shown in Figs. 2 and 5 of the drawings is in the nature of a dog or lever s, fulcrumed on the slide within the recess4 of the turret and having one arm 51 thereof disposed in the path of movement of an abutment-face 20' on the pawl R and having on the other arm 52 a stop-face 53, shiftable when the abutment-face 20 of the pawl strikes the arm 51 on the retractive movement of the bolt into engagement with one of the ratchet teeth or pins 10 of the turret, and thereby arresting the rotative movement of the turret and simultaneously arresting the retractive movement of the bolt.

In Fig. 11 of the drawings the stop device 3' is shown as a curved spring or resilient arm fixedly secured at one end to the upper face of the turret-slide and having a curved laterally-projecting portion at the opposite end thereof adapted to engage in the successive lock-notches 9 of the turret during successive rotative movements thereof to hold said turret against accidental rotative movement.

In addition to the stop device 3 and the locking device L, which limits the retractive movements of the bolt and slide, respectively, I have provided in connection with the forward end of the slide S two adjustable stop devices 5 and 8 (shown in the nature of screw-bolts) having screw-threaded bearings in a depending flange at the forward end of the slide S, and the former of which is adapted on the advancing movement of the slide S for engaging a portion of the carriage O to limit the advancing movement of said slide, and the latter of which is disposed in position to be engaged by the rear end of the bolt-actuating bar 38 on the retractive movement thereof and is adapted for limiting the retractive movement of the bolt.

For the purpose of protecting the guideway 14 of the turret-slide against the entrance of dust, &c., I have provided a face-plate 55, which covers the rearward portions of the turret-locking bolt, guide-blocks, and the recess 27 in the turret-slide, and for covering the slot 37 in said slide I have provided a guard-plate 56, which is secured to the actuating-lever above said slot.

The spring 30, which bears at its forward end against the rear end of the turret-locking bolt and at its rear end against the tensionadjusting device 32, serves not only to retard the retractive movement of the bolt, but will in practice constitute a bolt-advancing device, so that when the turret-slide has been returned to its normal retracted position and the turret-locking bolt has been withdrawn from locked engagement with the turret through the medium of the actuating-lever 33, which at the same time effects, through the medium of the pawl R, a rotative movement of the turret to bring its next succeeding lock-notches into registration with the bolt, the bolt will on the release of the lever 33 be shifted by the spring |3O into locked engagement with the turret, as will be readily understood by reference to Figs. 2 and 5 of the drawings.

Certain elements of the turret mechanism constituting the subject-matter of my prescut invention are generically involved in combination with other elements in the subjectmatterof aconcurrently-pending application, Serial No. 669,014, filed February 3, 1898, to which reference may be had.

Having described my invention, I claim 1. The combination, with a turret and its support, of a sliding bolt for locking the turret; a shiftable device carried by said bolt for rotating the turret; and means for actuating the bolt.

2. The combination, with a turret slide and a support therefor, of a turret rotatably mounted on said slide and having a series of stop-faces; a turret-locking bolt supported for reciprocatory movements on said slide and in position to engage the successive stop-faces of the turret upon successive rotative movements of the turret; a turret-rotating device carried by said bolt; .and means for retracting and advancing the bolt to unlock, rotate, and relock the turret.

3. The combination, with a turret -slide and its support, of a turret mounted on said slide and having a series of stop-faces disposed in a circuit equidistantly about the axis of movement of the turret; a turret-locking bolt; means carried by the bolt for i1nparting rotative movements to the turret, to bring successive stop-faces in operative relation with the bolt; and means for retracting and advancing the bolt, thereby to unlock, rotate,- and relock the turret.

at. The combination, with a turret slide and its support, of a turret mounted on said slide and having a circuit of equidistant stopnotches; a sliding bolt shiftably mounted on said slide; a paWl-and-ratchet device carried a one member by the turret and the other by the bolt; and means for reciprocating said bolt to unlock, rotate, and relock the turret.

5. The combination, with a turret-slide and its support and with a turret rotatably mounted on said slide, of turret-slide and turret-actuating mechanism including a turret-locking bolt mounted for reciprocatory movement on said slide; a pawl-and -ratchet device one member of which is carried by the turret and the other of which is mounted on the turretlocking bolt; and a connecting-actuator between the bolt and the slide and effective, on one movement thereof, for first locking the turret against rotative movement and then advancing the turret-slide, and on another movement thereof for first retracting the slide and then unlocking and rotating the turret.

6. The combination, with a turret-slide and a turret rotatably mounted thereon, of a turret locking bolt shiftably mounted on the slide; a pawl-and-ratchet device one member of Which is carried by the turret and the other by the bolt; and a slide and bolt actuator shiftably connecting the slide and bolt and effective for imparting a reciprocatory movement to said slide and bolt one in advance of the other.

7. A turret mechanism comprehending a turret-slide; a rotatably-s upported turret having a circuit of equidistantly-disposcd locknotches, and also having a circuit of equidistantly-disposed ratchet pins or projections; a turret-locking bolt supported for reciprocatory movements on said slide, at one side the axis of rotation of the turret, and in position to enter the successive lock-notches of the turret upon successive rotative movements of said turret; a pawl shiftably mounted on the locking-bolt in position to engage a ratchet projection on the turret on one reciprocatory movement of the bolt; and means for advancing and retracting the bolt to lock, unlock, and rotate the turret.

8. The combination, with a turret-slide, of a turret rotatably mounted on said slide and having a series of circumferentially-disposed lock-notches; a sliding bolt mounted on the slide at one side the axis of rotation of the turret and in position to engage in said locknotches successively; and means carried by the bolt and effective, at a predetermined point in the retractive movement of said bolt, for engaging and imparting a rotative movement to the turret.

9. The combination with a turret-slide, of a turret rotatably mounted on said slide and having a circuit of equidistantly-disposed stop-faces; a turret-locking bolt shiftably supported at one side of the axis of said turret in position to engage successive stop-faces; a turret-rotating device pivotally mounted upon and shiftable with the locking-bolt, and effective, at a predetermined point in the retractive movement of said bolt, for engaging, and imparting a rotative movement to, the turret; and an actuator shiftably connecting the turret-locking bolt and turret-slide, and effective for imparting reciprocatory movements of different ranges to said bolt and slide. 10. The combination, with a turret slide and a turret rotatably mounted thereon, of a turret-locking bolt supported for reciprocatory movement on the slide; a turret-rotating member carried by said bolt; means for imparting a reciprocatory movement to the bolt and slide, one in advance of the other, and a resistance device between the bolt and slide. 11. The combination, with a turret-slide and a turret rotatably mounted thereon, of a turret-locking bolt supported for reciprocatory movement on the slide; a turret-rotating member carried by said bolt; means for imparting a reciprocatory movement to the bolt and slide, the latter in advance of the former; and a resistance-spring interposed between the turret-locking bolt and the turret-slide.

12. The combination, with a turret-slide and a turret rotatably mounted thereon, of a turret-locking bolt supported for reciprocatory movements on the slide; a turret-rotatin g member carried by said bolt; means for imparting a reciprocatory movement to the slideand bolt, one in advance of the other; a friction-retarding device in bearing engagement with, and effective for retarding the rec1procatory movement of, the bolt; and a spring interposed between the bolt and slide, and effective for exerting an advancing stress upon said bolt.

' 13. The combination, with a rotatable turret, of a turret-supporting slide and a turretlocking bolt, the latter of which is carried by, and is shiftable independently of, and also in unison with, the former; means for limiting the independent movement of the slide relatively to the bolt; and actuating means therefor.

14. The combination, with a rotatable turret, of a turret-locking device and a turretrotating device pivotally connected together for unitary reciprocatory movements and one for movement transversely of the other; a turret-supporting slide embodying means for supporting and guiding said devices; and means for imparting reciprocatory movements to the slide and locking device, the latter in advance of the former, during the first part of the advancing movement.

15. The combination, with a turret-slide and its support, of a turret pivotally supported on said slide and having a hollow base porthereof; a turret-lockin g bolt shiftably supported in said guideway in position to engage the successive stopfaces of the turret; a spring-pressed resistance device supported between the side face of the bolt and the tapered face of the guideway, and adapted for retarding the movement of said bolt; and means for reciprocating said bolt.

18. The combination, with a rotatable turret having a concentric circuit of stop-faces, of a turret-supporting slide having a longitudinal tapered guideway in the upper face thereof; a turret-locking bolt shiftably supported in said guideway in position to engage the successive stop faces of the turret; a spring-pressed resistance device or guide supported between the side face of the bolt and the tapered face of the guideway, and adapted for retarding the movement of said bolt; means in connection with, and effective for regulating the frictional resistance of, the guide upon the bolt; and a reciprocating device in connection with said bolt.

19. The combination, with a rotatable turret having a concentric circuit of stop-faces, of a turret-supporting slide having a longition; a series of ratchet teeth or pins disposed concentrically about the axis of the turret and extending into the hollow portion of said turret; a series of stop-faces disposed concentrically Within the hollow portion of the turret, and which stop-faces are located below the horizontal plane of the lower ends of the ratchet-teeth; a turret-lockin g bolt supported for reciprocatory movement in a guideway in the turret-slide and having a head in position for successively engaging the successive stopfaces of the turret; a pawl pivotally secured.

to the turret-locking bolt in position for successively engaging the ratchet-teeth, on successively-retractive movements of the bolt, to impart rotative movements to the turret; and means for reciprocating the bolt.

16. The combination, with a turret-slide and its support, of a turret rotatably mounted on said slide and having a tubular base portion, and also having a concentric circuit of ratchet teeth or pins and a concentric circuit of stop-faces disposed within the tubular portion, one circuit above the other; a sliding bolt supported for reciprocatory movement in a slideway in the upper face of the slide at one side of the axis of the turret and in position to engage the successive stop-faces; a pawl pivotally supported on'said bolt in position to engage the ratchet-teeth successively; means for retracting and advancing the bolt and pawl concurrently to unlock, rotate, and relock the turret; and means carried by the slide and cooperative with the bolt, turret, and pawl for limiting the retractive movement ofthe bolt, and also for preventing a continued rotative movement of the turret.

17. The combination, with a rotatable turret having aconcentric-circuit of stop-faces, of a turret-supporting slide having a longitudinal tapered guideway in the upper face tudinal tapered guide'way in the upper face thereof intersecting the path described by the turret, and at one side the axis of said turret; a turret-locking bolt shiftably supported in said guideway and in position to engage successive stop-faces of the turret; two tapered retarding-guides disposed between opposite side faces of the bolt and the adjacent faces of the guideway; springs interposed between the inner ends of the guide-blocks and a fixture on the turret-slide, and adapted for pressing said guides tightly against the bolt to retard the movements thereof; a spring hearing at one end against the inner end of the bolt, and at its opposite end against a tensionadjusting device carried by the slide, and adapted for exerting an advancing thrust upon the bolt; means carried by the bolt and cooperating with devices on the turret for imparting a rotative movement to said turret at each retractive movementvof the bolt; and means in shiftable connection with the bolt and slide and effective for imparting reciprocatory movements to said bolt and slide.

20. The combination, with a rotatable turret having a concentric circuit of stop-faces, of a turret-supporting slide having a longitudinal tapered guideway in the upper face thereof intersecting the path described by the turret, and at one side the axis of said turret; a turret-locking bolt shiftably supported in said guideway and in position to engage the successive stop-faces of the turret; two tapered resistance-guides disposed between opposite side faces of the bolt and the adjacent faces of the guideway; springs interposed between the inner ends of the guide and a fixture on the turret-slide, and adapted for pressin g said guides tightly against the bolt to retard the movements thereof; a spring bearing at one end against the inner end of the IIO bolt and at its opposite end against a tensionadjuster carried by the slide, and adapted for exerting an advancing thrust upon the bolt; means carried by the bolt and cooperating with devices on the turret for imparting a rotative movement to said turret at each retractive movement of the bolt; means in shiftable connection With the bolt and slide and effective for imparting reciprocatory movements to said bolt and slide, the former in advance of the latter, (1 urin g a part of the advancing movement; and a stop device shiftably mounted on the slide and cooperating with the fixtures 011 the turret and bolt, at a predetermined point in the retractive movement of said bolt, for arresting the rotative movement of the turret.

21. The combination, With a rotatable turret having a circuit of concentrically-disposed stop-faces and with a reciprocatory turretlocking bolt, of a turret-slide supporting said turret and having an elongated slot extending therethrough; a slide-supportin g frame or carriage; a bolt-actuating bar supported below the turret-slide and fixedly secured at one end to said bolt; and an actuating-lever pivotally connected at one end to an arm on the slide-supporting carriage, and having a stud or pin extending through the elongated slot in the slide and fixed to the bolt-actuating member, whereby, on a movement of the actuating-lever in one direction, a turret-locking movement Will be imparted to the bolt independently of the slide, and subsequently a unitary advancing movement will be imparted to the bolt and slide.

22. The combination,with a turret-slide and a turret rotatably mounted thereon, of a turret-lockin g bolt supported on the turret-slide for reciprocatory movements with, and independent of, said slide, and having an actuating-bar supported below the turretslide; an actuator in shiftable connection with the slide and bolt-actuating bar, and adapted for first imparting a turret-locking movement to the bolt, and then a unitary advancing movement to the slide, bolt, and turret; a gravitative locker pivotally supported on the slide; a locker-actuator disposed in the path of movement of the locker and effective, at a predetermined point in the advancing movement of the bolt, for locking said slide and bolt together for unitary advancing and retractive movements, and eifective, at a predetermined point in the retractive movement of said slide and bolt, for releasing said locker to permit a continued independent retractive movein cut of the bolt; and means for arresting the retractive movement of the slide on the releasing of said locker.

23. The combination, with a turret-slide, of a turret rotatably mounted on said slide and having a series of internal concentrically-disposed stop-faces; a bolt shiftably mounted on the slide at one side the axis of rotation of the turret, and normally engaging a stop-face; a pawl pivotally mounted on the bolt and effective, at each retractive movement thereof, for engaging a fixture on, and imparting a rotative movement to, the turret; and an actuator connecting the slide and bolt and effective for imparting reciprocatory movements thereto.

LOUIS H. BLOOD.

Vitnesses FRED. J. DOLE, GEO. A. HOFFMAN.