US2329061A - Coupling device - Google Patents

Description

-P 1943- J. F. KOPCZYNSKI 2,329,061

COUPLING DEVI CE Filed May 1, 1945 2 Sheets-Sheet 1 ATTORNEY S p v I J. F. )KOPCZYNSKI 2,329,061

COUPLING DEVICE Filed May 1, 1945 2 Sheets-Sheet 2 T i I INVENTOR V '25 BY at? ATTORNEYS Patented Sept. 7, 1943 3 churn-Ne DEVICE 'T' o n 'Koiic zynski, Buffalo, My; f 3 Application May-"1,1943, SerialNo. -485,355 I neura (c1.16 1-124 This invention relates to couplingdevices-and especially to those whichf are-utilizedfor coup ling a tool to 'aholder therefor.

An example oifsucha --tol and holder is'a punch-element and a holder therefor which are", commonly employed for punchingapertures blanks. T In such devices the punches frequentlybreakin use, and it is highly desirable to provide for quick detachment, of the broken punch and its replacement by a fresh punch.'- It be-" comes necessary at intervals during useto grind I the worn iree'ends of the punches in order to renewthem and where a pluralityof'punches are mounted onthe said ho1aer-,-i# is desiral'ile that this grinding of the ends of the punches be done as a group in a simple and rapid manner.

An object of this invention 'is -to provide an improved coupling between a stud and a holder therefor by which the post may be easily'and20 byslmple manipulative movements;.with which the' post may be securely held within the holder simple,

quickly attached to or'removed from the holder during fuse, and which will be'relatively efiective, compact and inexpensive.

improved coupling between a tool element and a holder therefor, by which the tool element may be attached to or removed from the holder by simple rotary and -endwise movements of "the tool element relatively to the holder, yet with the tool element held securely in the holder, during use,' the device being produced by simple inexpensive methods of manufacture.

Another object of the invention is to provide an improved holder with which tools or other elements may be releasably coupled thereto and uncoupled therefrom by simple movements; and which may be made at lower cost than prior devices for accomplishing the same result.

Another object of the invention is to provide 7 an improved punch device of the typehaving,

a stripper carried bythe-holder and with which the punches may be coupled anduncoupled from the holder by simple manipulative movements; 1

properly positioned and held against uninten- 01011211 rotary displacement while being assembled and j will be in operative relation tozastr'ipper, and which will be :relatively simple and inexpensive g Other objects and advantages will :be' apparent T from the following description of's'ome embodi Jments of. the invention, and the novel'featu'res will be particularly pointedout hereinafter. in

connection withthe appended claims.

In' the accompanyingdrawings:" r: r v Fig.1 is=a sectional plan of a' holder constructe ed in accordance with this invention, the portion of one corner being broken awayto show other 1 details; i 1 Fig. 2. is a sectional elevation of a part'of a punch .pres's having Eth holder, stripper and punch constructed inaccordance with this inven-' tion, the section'correspondingto one taken along the line'22, Figl;

'Anotherobject'o-f the invention is to provide an Fig.3 isa 'sectiohalplan through .aportionof the'sama the sectionbeing taken approximately along the line 3 3 'of Fig. 2;:betwen the facesof'twoof theabutting plates, forming the holder. 1

Fig 4 is a sectional plan of a portion'of the J sameythe section being taken approximately along the line 4-4 ofFig. 2; 3

that maybe used to apply the punches toorremove "them from the holder;

CFiQ-"Gis a'sctiorial elevation through: a por- ;tion or the-holder to show coupling means'be-" tween the-sections of the stripper, the section being taken'approximately along the line 6+6":

of'Fi'g.- 1. i

Fig. 7-is a sectional plan I afm-odification'of' the construction shown in Fig.6; v

Fig. dis a sectional elevation of thesame; the

section being taken approximately along'the'line Fig. 9"is a sectional pl'an'similar tofiFigi sand I illustrating'a' modification thereof.

Referring first to Figs. lto 6, the invention" is shownasapplied'to a punch press of simple form inwhich the piercing punch] (Fig; 2) is'releas ably secured toa holderZ which is carried by a shank 3 that is suitably supported on a movable press member;- The holder 2 is formed of a-plu-"' rality of flatmetal plates 1,5,"6 and T, which are disposed faceto' face and 'flat againstoneam other sequentially, and they are 'removably cou-' pled'together in any suitable manner; or'they may," be permanently coupledtogether after the device has .been assembled. The- plates 5, 6 and Tare,

provided with alin'ed bores or apertures 8, 9' and is I0 respectively, which'pass from face to face and together constitutea recess R; extending from the T interior zone of theoutjside. face of the plate L Fig. 5 is a perspective ofa Wrench or appliance 7 formed by the bore 9.

an aperture I2 from face to face, .Fig..r3,,which.

intersects the bore 9 slightly atone side thereof.

It will be noted that the aperture I2 and bore 9 I in plate 6, while intersecting one another, are

entirely encircled by unapertured portions of the plate 6 and aperture I2 is also closed at both faces by the abutting plates 5 and I and is, in eifect,

a cavity in the holder.

guided in its ends by two opposite sidewalls of ness, slightly less than the thickness of the-plate 6, so that this key I3 will slide freely in the aperture I2 in a direction radially toward and from the longitudinal axis of that portion of the recess The shank II of the punch I within the IBCESSiR formed by the alined bores in plates 5, Sand 1, is provided witha transverse kerf of slot I4 which extends transversely across the shank at one side thereof in alinement with i the aperture I2. This kerf or slot has its side Wallsin flat parallelplanes normal to the longitudinal axis of theshank II of thepunch. The,

plane of the sidewall I5 ofthe kerf I4 which first enters the recess in the holderwill be substantially coincident with the planes of the abutting faces between the plates '5. and Ewhen the shank II is fully within the .bores8, 9 and I0, as'shown in Fig. 2, so that thekey I3 maybe moved into the kerf or slot, to latch the shank II within the holder. The width of the kerf or slot I4 is,

of "course slightly greater than the .thicknessof. the adjacent edge wall'zone of the key I'3,,so that,

thekey I3 may move freely into and out of the kerf.

Within a helicalcompression spring I6 which is disposed under compression between an edgewall of the aperture I2 and a corresponding parallel edge wall of the key I3. This spring yieldingly and con-'' tinuously urges the key I3 into a positionpar tially across the bore 9 and thus to a slight extent across the recess R formed by the alinedbores 8, 9 and IE), but the engagement of the key with theedge wall of the aperture I 2 adjacent the bore 9 will limit the extent to which the, ,keymay-be projectedacross the recess in the holder; J I

which is received Disposed in the aperture I2 is a fiat key I3 in the form of a plate which is a theaperture I2. The key I3 is of unifor'mthick-i' the cavity I2 or: the plate 61, I provide To prevent accidental displacement; of I the spring I6, the pedge wall of the cavity I2 against which an end'of thespring I6;abuts is provided with a shallow notch or recess l1 to receive the adjacent Eend of -th'e'-spring I6, and the.key- I3 is similarly provided in its edge wall engaged. by'

the spring I6 with a notch I3 into which the end of the; spring is received. The spring I5 is held in position and against; displacement by the notches-ll and. I8 andby, the; faces -of the plates 5 and I which abut the plate .6. the "shank IIwhich is the" end that first enters the recess formed 'in' the plates"5,--6r and I, is

chamferedon an edge thereof, asat I9, preferably directly in endwisealinem'ent with the kerf I4, so that when the shank H of thepunch is inserted: in an endwise-direction on the borerlll The-free end of p with the key I3 and cam the latter aside as the shank is pushed endwise into recess R to enable continued movement of the shank II into and along the bores 9 and 8. As soon as the kerf I4 moves into alinement with the key I3, the latter will be snapped into the kerf to latch the shank I I within the holder.

In use, the shank II of the punch I may tend to bind in therecess in the holder, andzin such a case it may be necessary to apply. a tool to the punch to rotate it so that the cylindrical, peripheral wall of the shank adjoining the kerf may cam key I3 back into the cavity'l2 and out of this'purpose, the shank II, in a zone outside of the recess in the holder, which will be below the plate I inFig. 2, is provided with one or more transverse kerfs 20, and a tool or wrench,'such as-shownin Fig. 5, may then be applied to the shank at these kerfs to turn the'punch and move it endwise. Thistool 2I shown in Fig. '5 is provided with arms 22 having a distance or gap between them such that these arms may slide along the bottoms of two opposite kerfs 20 of the shank I I of the punch. The side walls of these kerfs act as shoulders abutting endwise of the shank against the wrench, so thatjwhen-rthe wrench 2I is turnedor moved endwise, it willimpart similar movements to the punch I, This wrench 2| may have a handle portion-23 -by which it may be turned and moved endwise.

With a punch of this type, the stripper'plate may bemounted" one base havingthe tool with the aperture therein, or it maybe mounted on the holder. In this-particularexample, the stripper ismountedfon the holder. The stripper, designated generally by reference A, is formed of two flat plates 24 and 25 which abut face to face and are removably coupled together. Shouldered screws 26 are-threaded into the plate 24 so as to extend therefromtowards the plates 4, I '5, 6 ,and I, and. the shanks-of these screws 26 extendthrough and slide endwise in apertures 21 the plate .1, and into recesses 28, 29' and 30 in'the plates 4, 5 and 6 respectively.

'The heads -3I of the screws thus are slidably and rotatably disposed within the alined recesses 28, 28 and 30, but engagement of the heads 3| with the plate 'I will limit the movement of the plate24 in a direction away from the-holder 2 formed bythe plates 4, 5,.6 and I.

A helical compression spring 32 surrounds each screwZB and is under compression between. the plate land the plate 24 so as to yieldingly urge the plate 24 in a direction away from the plate I to the extent permitted by the engagement of the heads 3| of the screws 26 with the plate I. The plate 24 is provided with an aperture 33 en'tirelytherethrough and alined with the punch I. 'Iheaperture 33 is'of a size to freely pass the wrench therethrough and to enable it to be applied to or removed from the shank II of the punch with the handle part of the wrench descending below the punch and the plate 24. The plate'25 of the stripper isprovided with a passage 34 which slidably fits the piercing .endof the punch I and into which passage the free end in plate I, this chamfered end edge will engage 2,329,061 permit relative mevment of the -stu'd 38 fully? I 7 I pulled endwise "to =remove the punchfrem the holder; A' new punch niay be inserted in the Y holder by @a similar but reverse' series of opera-{ tions; and :;the plate '25 is appli'ed 'over the free endlofrthe punchy! and'qcoupled to the plate as; r i s Since the plate 24 is not retrieved, the springs 3 32 are not released and the 'replatceme'nt of a punch: is a simple operation. Where a' number of punches are-carried by the 'same holder; and itisdesirable to grind the free endsof the punches after extensive use, this can be done 'while the punches :remain' in the-holder by-merely rem'ov-- in'g'the plate 25, whichzeirposes -theTree ends of ground off :to the same.eXtentby-a single grind}? ing operation and while the punches remain 30 erable savihg i'n-time"by grinding the free ends mounted in'the holder; This 'effects a considof'the 'punchesas a group. 1

' y suitable means maybe employed for coupling' the plates 24 and 25 of the stripper A. A-

very satisfactory coupling is shown in the upper left-hand corn'erof Fig. 1, and in Fig. 6. Re ferring particularlyto Fig 6,"a' shouldered e1e-- ment or stud -38 is secured, such as by riveting, to the plate 25, and its free end rotates and slides endwise an aperture-3 9 "in the plate 24 and also projects loeyo nd the-plate 21,1 l projecting portion of -the stud extends-intofacoupling member fl. This member 4&1 is formed oftwo plate-like sections a andb abutting face to face and having alined apertures therethrough to form a recess H intoor throughwhich the;

stud 33 extends."- "One of "these sections; such as into the meniber M andthens the key 4'3" wilhbe snapped'into -'latching"zposition inrithe iker'f .or 1 slot l liby' therspringillilf v a In Figss'l' and 8,:ial7s1ight modificationof -.this'- type of coupling is shown; in which the member I? 48 is similar .to trim-member 40,: except that its has l'a'terally extending. ears 49gwhich may be see.- cured to the plate, such as by rivets or screws-- 50.":v similarly thestud 38ofiFigs.-l ands6 is replacedhy a stud i'ilfiwhich has a "frusto 'rconical head "52 receivedin a tapered or countersunk-seat 1 in theplate ZEJ Stud-5| t has "a; :slot orrecess :53 r

in its endiface by which 'iti 'may be: turned through the use :ofa'ss'crewdriveror other itool to 'uncouple the member 48 :and'fstud 51:: The other "parts: of the couplingt-are the'sameasinoFigs; 1 to fiszandi are given"corresponding:reference characters.

-Withthis mOdification;whenrone desires to uncouple the plate-'25 from the plate 24; the holder:

with the-stripper attachedtheretois elevated 'orx backed away'irorn tl're dieand .blank,"an'd then! the stu'df 5l is"turned through Jone-quarter revolution of more; during "whichithe cylindrical surface of'the stud il :cams athe key' 43' asidein the;- cavity 42; whe'reupon the plate :25 may be fpulled-- away from the plate"-2 l whichzremoves the-stud- 5| from the members 48: To reapplytheaplate 25 to theplate 24,"these?plates are brought into face to face abutting engagemehtiand then the-.-

stud 5| is inserted 'endwise through the plate 25 into the plate 241 and -"ihto'-the "cap: member 48Jx which is permanently: secured to --the:-p1ate 24;--.= The charnfere'd end edge of the-stud '5I cams the;- key 43- aside, and then when the ke-rfJor slot '44. moveswinto alinement with the 'key 43,'the latter is snapped into latching engagement in the kerf.,-

This arrangement thereforeris 'quitesimilarto,

1 that of Figs. 1 to6,exceptthat'the-stud member :5! corresponding to the Stl1dr38 f Figs. 1 and 6 is turned to uncouplethe platespinstead of rothe section a, .is: provided on the faces-abutting the section?) with 'a avity '42 which intersects 5 i 0- encircled by uncut portions of the member 40. Within this cavity 42-, I mount a key 43 which slides in a'linear directionan-d radially toward the recess M slightly, but isptherwise entirely and from the axis of the recess see Figi l 1 alsd'intdand out of a transverse kerf or slot provided in the side of the post or stud38f A spring 45 is disposed in thebavity between;

an edge Wall of the cavity and an edge Wall of the key so as to yieldingly urge; the key 43 into a kerf or slot' 44 in the stud 38 when the studis within the member "48; as shown in Fig. 6." The spring 45 may be receivedin notches 45 in the edge walls of the key43 andthe'edge wall of the recessfiz," so thatitcannot get out of operative position. The sections-a and b of member tating the couplingxmember as in Fig. 6.

In many instances, the free ends of v thepunches 'arenon-eircular andmay-even be square, or rectangular sop-that they will punch non-circu lar or rectangular square holesinthe blanks, and in 'such a case the apertures '34 inf-the stripper plate 25 are made 'ofsthesame shape as the free ter. While each punch-is yieldingly held in proper angular or rotary position by the engagement of therelated key l-3'jagainst the flatbot- --v tom wall 6f the lcerf' fl, in the Shank I i; nevertheless some. additional: means may be desirable,

to" insure that the punches are properly 'he1d-,to,-

enter the passages in the plate 25, 'because if the:

"shanks ll of the punches turn hard; in the holder recesses, one :maynot' be able to tell when the tom of the' kerf 14. l

\JIn such-agcase; onemay use shown inFig; 9, in which a=-kerf or slot H in the;

shankll is formed, asflexplainedinFigs, 1 to 6,.

65 are spot-welded or otherwise coupled together face to face after the key 43 and spring are inserted "in the cavity, and the member 40 thus acts as a'quick detachable nut on the stud 38 which'can be releasedby ajre-lative 90 move ment between the member 40 and the "stutlsg38i The free'end of the stud 38"is eham-fered along t on-e 'e I ber 40 is applied over the endl of the stud t8, the-- chamfered "edge will cam the key/43 aside to a t AIL-Fig. 6, so that whenthemem 1 and also a second 1 kerf 54 may beg formedin theshank 11 at right angles to. and at one endof the kerf M, butthe kerf v54 need not extend more than partlyacross the side of the shank l l. The

key. 13a is made L-shaped so that the angular.

end"-5.5 may enter this second kerf 54. Then one may merely rotate the shank -II in thedi rection ofthe arrow-56, Fig. 9, until the corner of the shank H between the-rtwo kerfs engages in the inside cornerbetween the baseand side of the :L1andagainst the angular end-55 of the hey ends of the punches so as to slidingly. fit the lat-y the modification which provides a" definite stop for locating the; punch. To release a punch formed inthis man- 1 her, the punch is merely rotated in the opposite directions, such as in the direction of'the dash line arrow 51. of Fig. 9,'in whichicase the'inner into whichisaid key mayenter and which notch is alined with said aperture when said shank'is fully: within said :recess, whereby when said shank is inserted endwise intosaid recess until 5,, the notch is alined with theapertures, said key end 'ofthe second kerf 54 engages against the end of *the angular end 55 of the key and cams thedistorted slightly, in the punchingoperatiom' around the aperture, the hole or bore-,9 is made. a little larger than the bores Band lfl so' that it E 115 in one of. the interior plates of said sequence,

will not restrict the diameter 8 of the-recess R. Actually the bore land the aperture l2'may b formed by a single punching-operation.

Itis believed that theoper'ationanduse of the invention will be *clear'from the foregoing description, and it will not be again repeated. It

maybe projected into said notch to latch said element within the recess.

-3. A holder formed of aplurality; of flat plates abutting face to face sequentially and having ajloirecess opening therein from an interior zone of.

the outside face of one of said plates at the end of a sequence and extending in a direction normalto said outside face into at least. the third plate of said-sequence, the portion of said recess and through which said recess extends from face to face,having an aperture therein from face to face, at one side of and intersecting the recess in that plate, and spaced by unapertured go portions from the edges of, that plate, a key conwill be understood, however; that variouschanges in the details, proportions andarrangem-entsgof parts whichhave been herein"des'cribed and illus:

tratedin'orde'r toexpl'ainthe natureof the inventiorhmay be made by zthoseskilled in the art aperture and an edge of Said key for yieldingwithin'the principleand scope of the invention .as expressedin the appended claims;

11 claim as: my invention:

1 1;"A holderformed of a pluralitygof flat, plates abutting facefto' face sequentially and having a recess opening therein from an interior 'zone of ture toward and from said recess, whereby when the outside face of one ofsaid'plates at the end of a sequenceland extending ina direction nor- ,4

mal to said'outside face into at least the third plate of said'sequence, the portion of said recess in one of the interior 'plates'of said sequence,

fined in said aperture by the plates abutting the faces of said aperture and slidable therein into and out of a position partially across said recess, and-a spring disposed between an edge of said ly and continuously urging said key into its said position, said key having athickness slightly less than thethickness of the apertured plate and being guided by opposite side edges of the aperthe shank of an element with a notch in its side is inserted into said recess with said notch alined with said aperture, said key may be projected into said notch to latch said element within said recess.

and through which said recess extends from face to 'face,'having an'aperture therein from face to face, at one side ofand intersecting therecessi in that plate, and spaced by'unapertured portions from the edges of that plate, a key confined in said aperture by'the plates abutting the faces of said aperture and slidable therein into and out of a position partially acros'ssaid recess, and

a spring disposed between an edge of said aperture and an edgeof said key for yieldingly and continuously urging said key into its said posi-.

tion, whereby when the shank of an "element with a notch in its side is inserted into said resaid keyflmay be projected into said notch to recess opening'therein from an-"interior zone of r the outsideface of one of said' plates at the end plates f of a sequence and extending in a direction nor-' 5 mal'to' said outside face into at least the third plate of said sequence, the portion of said recess and through; which said recess extends from 4. A holder formed of a plurality of flat plates abutting face to face sequentially and having a recess opening therein from an interiorzone of the outside face of one of said plates at the end of a sequence and extending in a direction normalto said outside face'into at least the/third plateof said sequence, the portion of said recess in one ofthe interior plates of said sequence, and through which said recess extends from face Lto face, having an aperture therein from face to face at one side of and intersecting the recess in thatplate, and spaced by unapertured portions from the edges of that plate, a key confined in said aperture by the, plates abutting the faces of i "?:said a erture and slidable the in cess with said notch alined with saidaperture, p re mm and out of a position partially across said recess, a spring disposedbetween an edge of said aperture and an edge of said key for yieldingly and continu-, ously urging said key into its said position, and

551311 element having a shank of a size to slide endwise along and rotate in said recess and having 1n its'side a notch of a width into which said key may enter and which notch is alined with said aperture when said shank is fully within 7 saidrecess, whereby when said shank is inserted in one of the interior plates of said sequence,

face to face, having an aperture therein from face to face, at one side of and intersecting the recess in that mate, and spaced by unapertured cess, a spring disposed between an edge ofs'aidaperture and an edge of said key for yieldingly and continuously urging said key into its said positionand an element having a shank of a endwise into said recess until the notch is alined with the apertures, said key may be projected into said notch-tolatch said element within the recess, said element also having a non-circular Y -.portion outside of said recess to receive a tool by portions from the edges of that plate, a key con' fined in said aperture by the plates abutting the faces of said; aperture and slidablethereininto i and out'of a position partially across said-re- 7 ,;recess opening therein from an interior zone of size to slide endwise along and rotate in said 3 recess and having in its side 'a 'notchof 'a' width which said element may be rotated and moved endwise in said recess. I I

5. A holder formed of a. plurality of flat plates abutting face to face sequentially and having a the outside face of one of said plates at the end of a sequence and extending in' a direction normal to said outside face into at least the third plate of said sequence, the portion of said recess '75 in one ofthe interior platesofsaid sequence, and

ace;1having :an; aperture therein irzfrom"; face: to face,-.- at one; side of: and intersecting; the; recess .--in thatplate randspacedby; unapertured: por- ,ations from the-edgeso; that:p1ate;. a; key confined :in said aperture: by, the platespahutting. the faces of: said: aperture and: slidable therein .into :and

1 out of a. position partiallyxacrossg.saidirecesa, a

.ispring disposed between; an-edge -of; said-1 aperf tu-re and; an edgeuofgsaid key for ;.yieldi i 1gly;and:':- continuously urging said key :into; its said 'posi :rtio'ngzand anvelementxhaving a shank of a;siz'e;to iiISlidB endwise along and: -rtate1inz said recessiand '-,-'havii1g:"ir1: its" side ai'not'chof: a. width intowhi'ch iisaid key anay enter and "which notch alined;

'rwithsaidaperture when said shank is fully with- :tinz said; recess, wherebyv when said shank isi inserted endwise into said recess until the riotch'is gigalined with. the: aperturespsaid keyrmay be" pro 'J'ectedinto ;-said HOtChMtO latch saidPe'lement,

--within :the recess; the; end iofzsaid element first torenter said recess: being chamfe'red"along' one' Ledge; the side- Wall'xof said notchfirst to enter :;.said recess 'being disposed' in .a planeaapproximately normal to the longitudinalaxisotrthe ret :cess, and said keyrhaving its'facealong the edge -.Which en-gageswithi= said side wall of said inotch vdisposedrsparaller to -that; side wall.

' :GJ AhoIder formed ofaplurality: of fl'atplates abutting-face to face sequentially and having a cylindrical recess opening therein from an-interior zone of the outside face'of one of said plates s at the end of a'sequence and-extending-inga'direction normal to-said outside face into at least the third plate of said sequence, the portion of said recess in oneof-the interior plates of said sequence, and through-which said recess extends from face to'face, having an aperturetherein w fromfa'ceto face, at one side of and intersecting the recess in that plate, andaspac'ed'by una'per-e tured portions from the edges of that plate, a key confined in said aperture by the plates abuttingthe faces of said aperture and slidable therein into and out of a position partially across said recess, a spring disposed in said aperture. and

, 1 yieldingly urging said key into its said position,

a punch element having a cylindrical shank approximately fitting said recess and slidable endwise and rotatable in said recess, said shank having a transverse kerf in a side wall thereof which is alined with said aperture when said shank is substantially at its limit ofmovement into said recess and of a width to receive the adjacent' edge of said key, a stripper disposed parallel to but spaced from the said one plate at the end of a sequence, said stripper being formed of two members abutting face to face and removably coupled'together, studs carried'by and extending from that one of said members which is nearest said holder and having a limited'lost motion connection to said holder, whereby said stripper may have limited movement toward and from t said holder, and means yieldingly urging said stripper in a direction away from said holder,

said member carrying said studs having a hole therethr'ough from face to face in approximate alinement with said tool shank to enable awrench to be inserted therethrough and engaged withsaid shank to rotate the latter and also i move itendwise in said recess for engaging it in and disengaging it from said holder, the other of said members of said stripper having a passage therethrough alined with the free end of said punch element and in which it reciprocates.

' 7. A punch device comprising a holder hav ng 1 meme opening: into ;;t hei-samegfrom one face I"=fth10f,"fl fpunch having a shank-:rernovablyr'eceivediin said recess, means. carried byi-thehold- 2 er:- forireleasably-clampingsaid punch: in; said 1 re- 5 sc,ess;; aqstrippeniformedw :of 'a' pair ofmembers a; ahutting'xfacejcto itaceandz removably oupled t0- '5 gether, said-Y strippergiheing idisposed in face to face relation toabutaSpaced from:that; faceof; said hojlder; ,into'which; saidshank extendsgstuds -pcar-.

105 riedbywthat member: ofzsaidstripper facing.- said holder iandrihaving a: lost.v motion connection to isaidiholder "byywhiclw saidistrinper; mayshave dim- .eilied" movement towardz and from: "said holder, 1

' ,swspring, meansaactinggbetweerr said holder? and :saidstuds: also; having apertures aflinedl with said punch butsubstantially larger-nthanvthe-1punch rthrough: which-ac toolamayibe: insertedi in' a: di-

rection; along said punch'rto- :gripfltherpunch: and gturn it andtmoveit; endwise,- the other member ment in? said. holder inQai direction: to guide. said .rection'; in: which said punch extends: and: also lhavi'ng aiholeithroughl whichisaidpunch:extends, sai'd'xpun'ch'; having-on: its 'proj ectingiportiom' but betweensaid member. and? said holder; 2: non-cir in said recess, and said hole being of a size considerably larger than the shank of said punch to enable application ofLa tool to said punch at 5 said shouldered portion and rotary and endwise movement given to the latter,,springs yieldingly urging said member in a direction away from said holder, a secondmember in the form of a plate disposed flat against that face of said member farthest from said holder and having a passage therefrom alined with andfitting the free end of said punch for slidirigly guiding said punch, and into which the free end of said punch 'may be received when said members are farthest from said holder, and means for removably coupling said members together face to face.

9. A punchmounting comprising a holder having a recess opening thereinfrom a facethereof, apunch having a shank slidable endwise and -r0- tatable in said recess with the punch projecting from a face of theholder, a member disposed in "carrying studs having limited endwise movement in said holder in a direction to guide said member toward and from said holder in'the direction in which said punch extends, and also having a hole having on its projecting portion, but between-said member and holder, a noncircular, shouldered 7 portionloy which the punch maybe enga d and 1 rotated and moved endwise in said recess, and

the shank of said punchto enableapplication of a stripper 'ifOI': urging; the; latter iii-a1;direction away dram". saidrholder; said-stripper: member having i -10f said.stripperlhavingia passage theretmugh andecarrying studs.-having.liinited endwise-mover I memberftoward and fromfs'aidzholdeninrthej'dL,

-culanshoulderedlportion by whic hllthe unch -may be eng gedand rotatedvand moyediendwise spaced relation to said one face of said holder and through'which said punch extends, said punch said hole being of a size considerably'largerthan I springs yieldingly-urging said member in adirection away from said holderya second member in the form of a plate disposed .flat againstthat face of said member farthest from said holder and having a passage therethrough alined with and fitting the free end of saidpunch'for slidingly guiding said punch, and into which the free end ofsaid punch may be received when said members are farthest from said holder, 9. post carried by said second member and projecting toward'said holder, said first mentioned member having a passage therethrough slidingly receiving said post,

, said post having a cylindrical free end with a ting its faces an entirely closed cavity opening solely into said recess, a fiatkeyconfined-in said aperture by the platesabutting the faces of said *aperturedplate, having a thickness slightly less than the depth-ofsaid aperture from face'to face,

* and movable in said apertureinto and out of'a -posi-tion partially: across said recess, .a spring in said aperture urgingsaidikeyiin'to said position,

the edge portioncof said "key which'isprojected flat and in a plane'n'ormal 'tontheo longitudinal transverse kerf in one side thereof, an element Arotatably fitting the free end of said post and hav-l ing a key therein yieldingly urged agalnstthe periphery of said-post and into said kerf, saidkey being movable radially toward and from the longitudinal axis of said post, whereby upon relative rotary movementoi said stud and element; the

cylindrical portion of said post adjoining an end of said kerf will cam said key in a direction and fora distance sufficient to remove it from said kerf and'enable endwise movement of saidzstud relatively to said element, thefree end of said; 7 post being chamfered along its endedg'e-at one side thereof to act as a cam for cainming aside extending; in 'adirection normal to said outside face'into at least the third plate of said sequence from said one plate, the second plate of .said sequence from said one plate having thereinan aperture entirely from face to face'thereof, opening into said recess and encircled by unapertured portions so as to form with the plates abutwith said aperture, said key may be projectedinto said notch to 'latchssaid element withinasaid partially .across said! recess being approximately axis of the recess on. its'face .which is. farthest ,from the outer end or said recess; whereby when the shank of. an element-with a notch'in it'sside is received into said recess withithe notch alined recess. v

p c ng acylindricalimounting shank and a transverse, straight-'sidedkerI-entirely across one'sidethereof and a second trans- ".verse; s't-ra-ight sided kerf along another side of said shank Iat approximatelya right angle to and intersectingwith the first kerf and in the same peripheralzon'eifi i i [12; A coupling. comprising a holder having .therein' a recess openingutherein Vfrom aface thereof, and ,a cavity'intersecting said recess somewhat, an ,L-shaped flat key in said cavity ,and slidable therein. into and out of aposition partly across said recess, with the'open side of the Ljtowards'saidrecess, an element having a cylindrical .end. rotatable and endwise movable in said ferential zone a pair of transverse kerfs across the sides of said cylindrical; end; in alinement with said key when said end is within s'aidrecess and intersecting one another at approximately a right angle, said kerfs having widths which will receive anedge of said key when aligned therewith. JOHN F..KOPCZYNSKI.

recess, said element having in the same circum-

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