US1175196A - Tool-operating machine. - Google Patents

Description

FIELI.

WITN ESSES @2W/WM' 19.9%

' G. P. THOMAS.

TOOL OPERATING MACHINE.

APPLICATION FILED III-:0.28. 19m.

Patented Mar. 14,1916.

5 SHEETS-SHEET I.

V////MWWW THB COLUMBIA PLAIyOuRAPI-l co.. WASHINGTON. D. c.

G. P. THOMAS.

TOOL OPERATING MACHINE.

APPLICATION FILED DEC.28, I9I4.

lmente@ Mar. 14, 1916.

5 SHEETS-SHEET 2.

FIC-3-2- 151B COLUMBIA PLANOGRAPH' co., WASHINGTON, DA C.

G. F. THOMAS.

TOOL OPERATING MACHINE.

APPLICATION FILED IIIac.28, I9I4.

l 1 75 1 96. Patented Mar. 14, 1916.

5 SHEETS-SHEET 3- 30 Elle-1 WITNESSES THE CDLUMBM PLMIIOGRAPM co., WASHINGTON, D. c

G'. P. THOMAS. TOOL OPERATING MACHINE l I APPLICATION FILED DEC.2B, I9I4-y y I 1,175,196. Y Patented Mar. 14, 1916.

5 SHEETS-SHEET 4l wlTNEssEs mvENron THE coLuMElA PLANDGRAPH cu., WASHINGTON. D. c.

mgmm G. P. THOMAS.

TooL OPEATING MACHINE.

APPLICATION 'FILED DEC. 28, 1914. y A Patented Mar. 14, 1916.

5 SHEETS-SHEET 5- WITN ESSES a INVEN-ron 55 nisin of the work-carriage' shown' in? Fig.' '9.

GEORGE PAUL THOMAS, OF GLENSHAW, PENNSYLANIA.

TOOL-OPERATING MACHINE.

ySpecification of Letters Patent. ,l Patented Mr, 14,1916,

Application fried December 2s, i914. seriai No. 879,276,

To all whom t may Concern.'

Be it known that 1, GEORGE PAUL THOMAS,

residing vat Glenshaw, inthe county of Alle-Y gheny and Stateof Pennsylvania, a citizen of theUnitedj States, have'invented or discovered certain new. and useful Improvements in Tool Operating Machines, of which improvements the following `is a specification. f [j Y My invention relatesto tool-'operating machines which are provided. with work-carriages to bring to the tool, andl by successive step-by-step advances, thermaterial to be operated upon, means being provided to adspo Vance the carriage, land stopping mechanism to arrest its movement at predetermined regularor irregular intervals. l

TheJ vobject `of my invention is to. improve kthe carriage driving Vand stopping fniechanism. Y Y

A further obiect is vto provide a simple, efficient, and inexpensive construction wherein the tool operating mechanism and` the carriage eriving and stopping mechanism are so coordinated, that, when the machine has been started a blank of material may be operated uponvwithout further active attention on the part of aworkman. Y

Although not limited to machines for any specific purpose, my v invention is particularly applicable to machines for punching Vholes in structural steel plates and sections,

and is thus illustrated inthe accompanying sheets of drawings, Vwhich. form part .of my specification. i l

Figure 1 is a side elevation of one form of punching machine embodying my invention; Fig. 2 an Aend elevation, the plane of view being indicated by the line 114-11, Fig. 1; Figs. 3.and4 are side and end views, respectively, of a modification in driving construct-ion; Fig. 5 is a side view to enlarged scale of Vthe driving connections of the machine of Figs. 1 and 2; Fig. 6 a sec-A tional view taken on the line V1-V1, Fig.-

5, the uppermost pitman connections-being shown in elevation; Fig. 7 a sectional elevation, to enlarged scale, ytaken on they line VII-V11, Fig. "2, the housingy for the stopping mechanism being broken away to show such mechanism;l Fig. 8 a plan view of the stopping mechanism vas shown in Fig. 7; Fig. 9 a side elevation of a second embodiment of one feature of my invention; and Fig. 10 a plan view of the drivingfmecha- Vneath the punching tools 3.

thev several figures like used'to designate like parts.V

Thepunching mach ne may numerals are Y' beof any' Y Ysuitable construction, that shown .in Figs. y

1 and 2"being particularly adapted for platey punching purposes, andcomprising a frame lprovided with a reciprocating head 2, to

which a pair of punching tools 8 are secured.

.TheV head 2 is reciprocated in the usual and well known manner by means of a rotary-` y lshaftll, suitably connected to, or forming 'a part of, a power' shaft 5. Such shaft is` provided with a pinion 6, meshing with a pinion V7, secured to a shaft'8, 'which kshaft may bedriven continuously any desired manner,fas by'a motor 21. A further essentiajl detail of the punching machine consists of'dies y9 suitably secured to the frame 1-be- The'work-carriage or spacing'table also may be of any 'suitable construction. 1n the form shown in Figs. 1 and 2 the material vto be punched, such as a plate 10, is borne upon a carriage 11,movable upon suitable tracks 12, while in that ofA Figs. 9 *and 10 the. material is dragged after the carriage. y p While, as far as some features of mypresent invention are concerned,` any suitable means mayv be employed for driving the work-carriage or spacing table, the preferred means (and they form ajpartfoffmy l invention) are characterized bythe fact that the driving power continue toO act positively -to resist 'orabsorb the. rebound of the carriage after thestopping` mechanism has fbecome eective. Furthermore, in order 'to quickly and effectively overcome the inertia of the carriage,'and to release from the dies the material being operated upon, when, owing to chill tools or for other reasons, vburs are formed on such material, .twoV driving means are provided, one for effecting the initial, andthe other the concluding, moverment of the'carriage, Vtheformer means being positivev and unyielding. 1n the maioov chine showninfFigs. 1 to 8, inclusive, the 'i carriage-driving power is the power` shaft for reciprocatingthe punching tool, and the vconnections interposed Vbetween Vsuch shaft and the carriage arel constructed to accomplish the ends just stated.V

1n this machineV the carriage is provided valong its longitudinal center-line with a rack 13, which meshes with a pinion 14 secured to a driven Vvshaftlf).Such shaft extends through va housing" 16, "inclo'sing stopping driven shaft.` There may be a single pawli ,and-ratchet connectiom'as is shown in Figs.

Y' acts 3 and 4, to be presently explained, or two such connections, as shown in Figs. l, 2, 5 and 6. In the latter, one ofthe connections positively to effect the initialjmovement of the carriage, and the other acts through a and, as shown therein,

yielding member, preferably a friction clutch, to effect the further and concluding movement; and, in this embodiment of my invention, both are advance movements. While, Figs. l and 2 is driven by a rack, it will be shown in Figs. 9 and l0 may be employed, understood that a carriage of the `type the driving may be through an endless chain.

Vfor effecting an initial positive The pawl-and-ratchet connections may be of any suitable construction. Having ref.- erence rst to the unyielding connections movement of the carriage, the power shaft 5, as shown particularly in Figs. 5 and .6, is provided withv a pinion 17, which meshes with a secn ond pinion 18,.rotatably mounted on the vpivotally secured at one end, and at its other n frame l. To the pinionlS a pitman 19 is end is similarly attached to an arm 20, rotatably mounted on the shaft l5. The arm 20 is provided with a pawl 22 adapted to engage a yratchet wheel 23 keyed to the shaft ,.'gaging position.

15. Means are provided for'releasing the pawl 22 from its engagement with the ratchet,y for yieldingly holding` the pawl in :one or another of its alternate positions, and

for againthrowing the pawl to ratchet en- For: thus releasing the pawl, it is provided with a-iinger 28, adapted, upon the upward movement of thepitman, to be tripped bymeans of a stop 29,

,adjustably secured in. a slot-provided support 30. To hold the pawl in its alternate positions, there is provided a thrust bolt 2 6, held, by means of a spring 27, yieldingly against a suitable bearing face 24 ofthe pawl when the pawl is in operative position, and

nagainst a similar face 25 in the oppositeposition of the pawl. When outof `engagement with the ratchet, it'will be understood. that the pawl 22 will be in about the position in which theiinger 28 is indicated as being when the pawl is operative. To throw it into operative position. a second stop 31 is adiustably secured to the frame 30, and

Vagainst which stop the pawl strikes on the downward or return stroke of the pitman.

'By such an arrangement the pawl may be rendered active during any suitable period of the cycleof operation of the machine to advance the carriage any desired amount.

which" will be fully explainedi as just explained, the Vcarriage of` through a pitman tions are the same.

The pawl-and-ratchet connection'for eff fecting each concluding movement of `the,

. carriage are similar ini general construction 1 end of such pitman being pivotally attached 'to' an arm 34, rotatably mounted on the shaft l5. A driving member,ocmprisinga ratchet wheel 3G and. one member.` ofra .friction Clutch,fis also rotatably mounted ron .such

tion clutch consists of a frame or casing k,37, secured to the ratchet wheel 36 as by bolts .42, and a plurality ofplates 38, rotatable with they casingv but slidable therein .longitudinally of the Vsha-ft 15.` The secondl memberV of the. clutch consistsof a collar 39, keyedv to the shaft 15, and a plurality of plates 40, alternately arranged with the plates 1738.. The plates 40'v are rotatable with vthecollar 89, but slidable longitudinally of the shaft l5; and, to adjust the pressurev of the two series of plates upon each other, suitable springs 41 are provided.: The arm 34 is pro vided with a lpawl 43, held in engagement with the ratchet 36 byimeans of a spring 44. As will readily be seen, the two pawls .22 and 43 engage their respective ratcliets 23 and 36 so as to turn them, and hencethe shaft 15, in the same direction. Nomeans are provided to disenga-ge the pawl 43, so

that, during the initial movement of the car-Y riage, the shaft 15 is' driven through bot-h sets of pawl-andratchet connections. The concluding movement; however, is effected solely through the friction clutch, and the arrangement is suchl that the driving member continues to act after the driven shaft 15 has been arrested, thus beccmingetfective to absorb the rebound and shock incident to the stopping of the carriage.l

In the driving connections illustrated in ,y Figs. 3 and 4 but a single pawl-and-ratchet is employed, andV it acts through a friction clutch to effect both theinitial and conclud-` ing intermittent movements ofl the carriage. In this arrangement the driving memberconsists of a shaft 45, a ratchet 46 secured thereto. and kone member of a friction clutch 47, similar to that illustrated in Fig. 6. Thel other member of the clutch vdrives a pinion 48, which meshes with avpinion 49, secured to the shaft 15a. rIhe 4ratchet 46 is driven 50, secured to the power; shaft 5@L and to an arm 51 rotatably mount-l ed on the shaft 45, and pawl '52 secured to such arm. IWhether the driving connections of Figs. l, 2, 5 and 6,'or those of Figs. 3 and Y* i' a second pitman 33 f shaft. Thedriving-member part of `the fricrebound momentum and shock, both connect. .v

The stopping mechanism for arresting the ,carriage of themachine shown in Figs. land Y2, maybe of any desiredjconstruction( That i shown herein is similar to the stopping mechanism illustrated and describedinmy United States Patent No. 908,819. In the machine of said figures, the detent, drum,

rather Athan being mounted on la shaft borne yby the movable carriage as in said patent, is

arranged 'to arrest the carriage by stopping the rotation of the driven fixed shaftl, and means'for releasing the Vdrum-engaging detents and Yfor lifting the trip nger are coordinated with the power vshaft, so that the entire machine continuesto operate automatically and intermittently until a complete line of holes hasfbeen punched inthe blank of material. Howevenit will be understood that the stopping'mechanism may .beY such as is shown iii/Figari) and 10, the carriage being driven in the manner alreadyy explained;

In the stopping mechanism shown par- .ticularly in F igs. 1, 7 and 8, the detent drum A53 is secured directly to the shaft 15, and a plurality of pawls v54 are rotatably mounted on a shaft 55. -To prevent injury to the ,machine by the shcck ofthe stopping impact,the shaft 55 is mounted between the upper ends of a pair of levers 56 56a rotatably mounted on a shaft 57, the otherends of such levers being secured to 'ay rod 58, to which in turn there is attached a'rod 59 engaged by one end of .a stiff compression spring 60,. which abuts at its other endl against the housing 16. As in the above lmentioned patent, the openings in the pawls 5,4A t0 receive the shaft 55 are somewhat larger than the diameter of such shaft, and

lingers 61 61a pivoted as at 62,and acting under the tension of springs 68, holdsl the pawls forwardly. A second pair of pivot- :ed leversA 64.61a is provided to hold the pawls 54 from engagement with the detent drum,

4arms 70 and 70a, which are secured to a shaft 71. lThe end 0f the rod v691 adjacent to the carriage 11 is provided withY aV trip finger 79., which lies inthe path of suitably vspaced tripping elements v76 which may be of various forms, as illustratedin my Patent No. 835,123.1and are secured to the carriage 11. The otherend ofthe rod 69 has secured thereto a depending arm 73, attached by means of a linkl74 to a second arm75,' se

curedV totheshaft -'I`hus, when a trip- Vping 'element up0n theadvance. of the carriage @engages the finger`72,l such fingerisV movedyto Aturn the'rcd 69, which, through arm 73,"link 74', Aand arm 75, turns the shaft 67, which lshaft Vinturn moves 4thev fingers 64:, 64a to releasethe llatch 65, vpermitting the pawlsvto drop intoengagement with'the drum. .Y

To disengage or "release/the pawls 54: from thedrum 53, the shaft 71, which is rotatablyl mounted insuitable bearings 35, 35a, secured tothe frame l, -is provided with arms; 85 Sfrom the outer ends ofwhich" are suspended links 86, 86a.; A rod 87-exA tends'between the lower` end of such links and'i below the` series-of pawls 54.- rThe shaft 71 vis further provided with an arm 77, ccnnjectedby a link 7 8 to a second arm 79, secured'to one endof a shaft 80, which shaft is rotatably mounted'in vbearings 81,

81a, secured to the frame 1. :Attached to- Vthe other end of this shaft is an varm 82, vprovided with a roller 83, which bears on ,a cam 84 secured to the-shaft 4. The projecting portion of the cam 84 is in suchv po- Vsitionupon the shaftfl that substantially' at the. end of the punching operation, and

before the driving mechanism has become effective, arm 82 will beraised; and-the rais- 79, iink 78, arm 77, shaft 71. arms 85, 85a, links86, 86a,and rod 87, be eiective toraise the pawls 54 from their engagement with the drum 53 (such drum-engaging position being indicated in dotted lines vin'gFig. 7),

`ing of'thisarm will, through shaft 80, arm

tothe position indicated in full lines. Furthermore such rctaticnof the shaft 71 is effective,fthrough arms 70, 70a, to raise the rodl 69, and hence the trip finger 72 above the engaged .stopping element .76..- In the `furtherrotation ofthe shaft the connections foriraising the pawlsan'd trip nger returns to the positions in Fig. 7, andy in* readiness for the next stopping of the car- Ariage.

- For'further detailed. .explanation of the construction and operation ofthe stopping `mechanism reference may be had to my earlierlPatentsNo. 835,123and No. 908,819. The features of novelty of my present construction as compared to the ldisclosures of .`these.patents, concern the pawl and tripfinger release mechanism, and its cordinaten with the power shaft andgcarriage driving mechanism. l

After the completion of a `punching op@ eration the carriage .may be moved rearwardly by means of a motor 88, which may be mounted on the vhousing 16,v as shown in V Figa 2; A'cog wheel 89 is'rotatably mount? ed on'the driven shaft 15, and is provided 4with clutch teeth adapted to engage a clutch sleeve 99, rotatable with the shaft 15 Vbut longitudinally sldable thereon, as by means of the hand lever 91. A suitable chain 92 vextends' between the power shaft of the mon tor and the wheel 89, so that by moving the collarV 90 into engagement withy such' wheel, and releasing thepawls and 43 of the driving connections, the motor may berun to move the carriage rearwardly. As an alternate construction, the motor for effecting the rearward drive of the carriage may be mounted on the carriage itself. This may be accomplished, asin the machine of Figs. 9 and 10,- by a motor 104 acting through the driving connections therein illustrated, and to be presently described.

Before describing the constructionv of the modification shown in Figs. 9 and 10, the

operation of the above described Vmachine will vbe explainedT Vhile this machine may be used for punching evenly spaced holes in structural blanks, such as. the plate 10, it is particularly adapted to punchirregularly spaced holes. In :setting up the machine for a particular spacing, the shortest and the longest spacing intervals are first ascertained; Vhen `the drivingr connections of Figs. 1, 2, 5 and 6 are employed, the pawl stop 29 is set in the frame 30 at such a point that the pawl v22 will be released fromthe ratchet 23 before the .carriage has been driven a distance equal to the shortest Spacing interval; and the radial' distance from the center of the shaft 5 to the point vof connection ofthe pitman 33 to the crank arm 3.2 is so fixed that, after the pawl 22 has been released,'the carriage will be driven through the friction clutch a distance greater than f the difference between the largest spacing interval and the" distance the carriage is driven by the unyielding driving connections, that is, through pawl 22. By such adjustments only the yielding driving' connections will, at the end of each spacing interbound momentum of very heavy movable carriages may be effectively absorbed. In

case the driving connections of Figs. 3 and l are employed the only adjustment necessary is that of the connection of the pitman 50 tothe crank arm of shaft 5a. This conne'ctionl should be such as to drive the carriage a distance greater than-the longest spacing interval.

In outlining a complete cycle of opera.-

that the stopping lmechanism is inl inopera- 'tive positionand the :punches withdrawn a distance less than the'sho'rtest spacing -inyand'rack13', effectivey to drive the carriage:

terval. The pawl 22 "is thenreleased'r(theV nger 28 striking'thestop 29) 5 yand the sec- 1 ond period of rotationof 'shaft i5 drives the carriageto the-end; of the spacing interval,

the connections to the shaft 15 being through l i crank arm 32,*pitman .33, arm 34s,;paw'l 43,V ratchet 36 and the friction clutch vmember shown in` Fig. 6. V,The advancing carriagey then causes astopping element .76 to trip the finger 72, which, through rod 69 arm',

linkji, arm 75, shaft 67, and levers 64,2 64a, l moves the latch 6 5 `from engagementfwiththe pawls 54,1 thus causing the pawls to drop .y into engagement with, and ypreventfurther rotation of, the detent drum `53. The -fnrf ther action ofthe carriage driving connect" tions through the friction clutch becomes effective to absorb the rebound of the carriage. The third period 'of rotation of shaft 5 is effective, through ythe shaft t to bring` the punches 3 into operation upon the plate y The fourth` and last period of the single rotation of lshaft 5 causes the punches 3 to rise, land' efectsva. release of thestopping mechanism.l The last mentioned step is accomplished thr tion of cam 8 4', armf8`2, shaftlSO, arm 79,H

link 78, arm 77, shaft 71, arms 85, a 'and rod 87 such rod being raised4 to liftfithe'L pawls `54. At the same time, therotationl ofthe shaft 7l isy effective, lthrough arms 70, 7 Qab and rodl69, tolilftthe trip `finger 7,2 over the engaged stopping .element. This position of the stop-'releasing mechanism l. is

partlyillustrated 1. the projec-` tion of the cam Stipasses the roller 83Aofv the' stopping irrechanismA is again in readiness for the next arresting of the carriage.` In Figs. 9 and 1Q thereis shown a differ-` ent form of tool-operating machine wherein two means are provided for moving the worklcarriage, `one of such means ,being positive and unyieldingy and adapted to effect the initial movement,and theother driving means actingthrough a yielding, member and adapted to effect the conchid-r` ing movement and to absorb the rebound of the carriage. l The punching'machinemay be of any suitable or wellr known construc-v sol f ugh the projectingipofry y ros tion, that shown herein consisting-of a frame 93, in which there is af punching head :951,: providedwith punching tools 95, and adapt-l edp'to be recipro'cated bythe rotation offV a. shaft196. Thefspacing'carriage, instead gof being-driven by a' finedv shaft .as in the m'aing mechanism movable With the carriage, and the material to be punched is secured to and' trails after the carriage. Itl Will be unnecessary to explain in detail the driving and 'stopping' mechanism2 of the carriage shown Vherein for they are fully described in my United States'Patent No.11',068,465.

lt is sutlicient to state that thefsuppoi'tingV vwtable 103 is provided v'with tracks97 for the "carriage trucks l98 WithV a de'teifit bar 99 adapted to Vbe Vengaged by 'the pawls 100Lof the carriage, land with araclrj 101 engaged by a driven pinion 1027of the carriage. The Y `driving of the carriageis. accomplished by lifmeans of a motor 10t, connectedfbya chain 105 toa shaft 106, Whichis provided with a magnetic clutch 107 and a Vfriction clutch 108. The driven member of the friction clutch is effective through pinion 109 and 20110, shaft 111, pinions 112, and`113, andV shaft r114, to drive the pinion 102. c

VlVhile broadly the machine shown in Figs. 9'and`10 illustrates various modifications of carriage driving mechanism, as explained in connection With the description of the machine of Figs. 1 and 2in a more specific aspect 'y the improvements Y of these' figures consist in the provision of unyielding means ,Y for eecting' the initial movement of acar-v riageprovidedwith yielding driving means.

iVhile various arrangements may be provided for this purpose, it isupreferred that theunyielding drivingl mechanism be coordinated Withthe rotation of the punch l *power shaft 96'.v In-themconstructionl shown herein Zthe lower side of the carriage frameV 115/ is provided With a depending frame 116 adapted to be secured to an endless chain n 117, extending substantiallythe full lengthV -of' the'spacing table,'and driven by means of pawl-and-ratcliet mechanism connected to the shaft 96. The chain passes over tivo cog Wheels 118 and 119,'fsuitably supported at' `-opposite ends of the table. l `4.5"chain taut, the wheel 1181s mounted at one n To keep the end of a lever .1.20, p ivoted as at 121, and having itsother end held'yieldingly tovvard theV punching machine by means of 'a spring 4 122. The cog Wheel 119 is secured to al roi n tatably mounted shaft 123, to which there is secured 4a ratchet vWheel 121.VV Adjacent to such ratchet, and rotatably mounted on the shaft 123, is an `arm 125, provided with a Y, vpawl 126. adapted to engage the ratchet124, gx and to which armthere is secured one end of a Ypitinan 127,-adjustably-connected at its other end to a crankl arm129, secured to the shaft 96. As already explained, the', pavvl# and-ratchet* driving mechanism is provided '60 to effect an unyielding initial advance of the carriage at each spacing interval,"the pur'- Vpose being to positively overcome the initialV inertia and theresistance to the carriage due t to' bursY formed on the material when 5I-punched. .Means aretherefore provided `to `from the spirit ofvmy lrelease the paWl 126HfrfoiiiV the ratchet` 124:1

before the carriage has been driven a distance equal to the shortest spacing interval. For such purpose this paWl may be 'controlled the same as the pand-22 of Fig'. 5, and such mechanism, althoughrindicated in, Fig. 9, need not be again explained.

In theoperation of this machine,gas far as Y concerns the construction'specifically illus?. trated', fthe initial unyielding driving of the carriage is' effected through the-fp'awl-and-V ratchetV connection and the chainv 117. y The Y cordination of these connectionsvvithjthe rotation of the shaft 96 is 'such thatthe'cfar- 1 ,riag'e' 'is moved "uponftlie Withdrawal ofV punches rfrom thev materialbeing punched.- The operation ofthe driving means mount- Ved on the carriage is fully described in said Patent No.1,0,68,456V and need not' behere repeated. Itis' sufficient to, state that the motor 104 runs continuously, and that'the powerV therefrom is transmitted 'tothe pin'-` ion 1.02 through the magnetic clutchl07 and the yielding friction clutch, 108,1 and AV that when the carriagefis stopped andthe circuit of effecting a rearward o-r return drive of the carriage. 1t will bel understood, hoyvlxV ever, thatvarious other modifications of.con'

es' t struction and'arrangementmay be used by those skilled in 'the art, vvithout .departingv invention as de nedin t the appended claims.V Y Y VThis application is, as far'as' there `is common subject-matterinv the'tvvo ca'sesfaV continuation of my vapplication Serial No.: 841-,331, tiled May`27 th, 1914; In' said earlier application I disclosedy a' machine substanf tially the same as thatshovvn particularly in Figs. 1 and 2 of mypresent application, but. differing therefrom in that ity did'nct in clude a secondpaWl-and-ratchet` 'connection Y for effecting an initial unyielding starting of the carriage, ri.or did it include the vfull detail construction of the stoppingl mecha-Y nism. Y

. V`I claim as my invention: -i

' 1. In a tool-operatingimachine, the combination of a movable Work-carriage; ar ro-V tating'power shaft, operative drivingl con-A nections between'saidl power shaft and the carriageincluding a driving memberposif tively and unyieldingly rotatable by-said' power shaft,fand a driven shaft; a'yielding' A spaces 3 clutch connecting saidl member to said driven shaft, andcarriage stopping meansoperative while said driving inemoer continues to' rotate. o

"2. AIn a tool-operating machine, the coin- `4bination of a movable work-carriage, a con- *driven shaft for moving the carriage, a

yielding clutch` connecting said driving member to said driven shaft', and means op-A erative to stop said carriage andA driven shaft while said driving member continues to rotate and through said clutch to absorb the rebound of the` carriage.

3. Ina tool-operatingmachine, the conibination of a movable work-carriage, a fconltinuouslv rotating power shaft, a rotatable driving memberfpawl and ratchet connec-A tions;'between i said power Aand driving lmeinber'impartingan intermittent rotation to the latter, a drivenshaft for moving the carrivage, a yielding clutch connecting 'said driv-y ing member to driven shaft, and carriagel stopping". Yrneai'is loperativer to arrest the movement of the arrilg While the driving member 'continues 'tofrotate Y 4,-' In a tool-operatingmachine, the combin'ationpfa movable work carriage; termittentlv acting meansV effective, when thefmovement of the carriage is unrestrained, tdY drive the carriage vpredetermined equal A and means for stopping said carriage before it Vhas moved through one of said'spaces, the continued. action of the driving means thereby becnning` effective to absorb .the rebound :movement ofthe carriage "5- In ,a tool-enemies machine, the cembtleten with a tool, a Workarriage, and' a power shaft; of` operative, connectionsA from said-shaftto the tool, a stopping mechanism .A for said carriage, and operative connections from said power shaft to said carriage,svaid last named connections being effective toy drive the carriage when 4said stopping mech,- anism is inactive and to yabsorb the rebound Vmomentum of lthe carriage when the stopping mechanism is active.

. 6, Ina tooloperating machine, the comf binaltion` with a reciprocatory tool, a work carriage, and al nower shaft; of operative connectionsfrom Saidshaft to the tool for e' an intermittent reciprocationthereof,` oper ative connections from said power shaft to` said carriage for; intermittently advancing it, stopping mechanism for arresting the ad- `Vance of the carriage, and operative co-nneo tions from said. power shaft to the stopping mechanism for releasing, said mechanism;

'7. In a tooi-operating machine, theV com,- bination with a tool, a work-icarriage, and a power shaft; of operative connections from;`

said shaft toy the tool for reciprocating it,.

operativey driving connections from said Lf shaft to said carriage and including a rotarvl; shaft, means effectivenp'o'n .the advance of 1 the carriage for engaging and stoppingsaid rotary shaft, and operative connection from said power shaft to said stopping means for n releasing said means.

'laV

8. "In a ytool-,operating machine, the coin-kl bination with a tool, a work-carriage, and a f power shaft; of Aoperative connection from; said 'shaft to, and for the. reciprocationiof, said tool., ydriving connections from saidi shaft to said carriage and including a rotary driven shaft, a datent drinn scoured to saiddriven shaft, stoppingpawls effective -u'poii the @Ob/"alice 0f the 'Carriage for engaging; said drum to arrest the movement of the carriage, and connections from said power x shaft to, and for releasing, said pawls.

9. In 'a tooloperatingmachine, the com.- binationV with a'tool, a"movable/iwork-canriage, and a power shaft; of tool-operating; connections from said shaft to the tool, 'opfl erative driving connections. from said shaft to said carriage for. advancingvit, stopping mechanism for the carriage and vincludinf'j a trip linger adapted to beengaged bythe adi-v vance of the carriage,`and`means operated by said power shaft for releasing said'finger;

10. In a tool-operating machine, the oom?. bination with a tool, kafmovable :work-care riage, and a power shaft of tool-operatin`g3-, connections' from said shafts tothe tool,eop7`i eratv'e driving connectionfrom saidshaft toy Said carriage and "fini/:lading a rcitjary'`l shaft, `stoppingl mechanism. adapted ,tov en# gagefand stop lsaid shafj ;',"'a, trip finger. enf gageable bythe advanceV of the carriage and adapted to render the stopping mechanism e Vec'tiv`eand a .single means 'operated byr. saidpower. shaft forreleasingisaid stopping mechanism and tripy fir'ige'.'V

ieg i 11; In a tool-operatingimachine,.lthe comf binlation with ka tool, a4 moVahleworkfcari.-y riage, and a power shaft;l of lah-rotatable;l driving. member, ,meansl coordinated (with,

the power shaftffor,intermittently'rotatingA bination Vof a movable ,work-carriage, un?.v

yielding drivingV connections for effecting an initial movemenh and yieldingA ldriving 1 connections for Y effecting:-Y a :further Inova-g ment of said carriage.

137i 11.1 a tool-operatingmachine, the. coin-f bination of a movable work-carriage, means for effecting an initial movement, and separate means for effecting a further movement of the carriage.

14. In a tool-operating machine, the combination of a movable work-carriage, unyielding means for eecting an initial movement, and separate yielding means for effecting a further movement of the carriage.

15. In a tool-operating machine, the combination of a movable work-carriage, unyielding means for effecting an initial, and separate yielding means for effecting a concluding movement of the carriage, and

means for rendering the unyielding movingmeans ineffective during such concluding movement of the carriage.

16. In a tool-operating machine, the combination with a tool, a movable work-carriage, and a power shaft; of tool-operating connections from said shaft to the tool, operative and unyielding connections from said shaft to said carriage for effecting an initial movement thereof, and a further means for effecting the concluding movement of the carriage.

17. In a tool-operating machine, the combination of a movable work-carriage, a power shaft, a driving shaft effective to move said carriage, positively acting means Vcordinated with said power shaft to eifect to give it an initial rotary movement, and a t second and yielding pawl-and-ratchet connection between said power and driving shaft to give it a further rotary movement.

19. In a metal-punching machine, the combination of a reciprocatory punch, a. movable work-carriage, stopping mechanism for said carriage, unyielding'means for giving said carriage an initial movement after an operative stroke of said punch, and yielding means for further advancing said carriage.

In testimony whereof I have hereunto set my hand.

' y GEORGE PAUL THOMAS.

Witnesses:

PAUL N. CRITCHLOW, FRANCIS J. ToMAssoN.

Copies of this-patent may be obtained for five cents each, by addressing the Commissioner o1' Patents,

, Washington, D. C.

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