US1323482A

US1323482A - martin

Info

Publication number: US1323482A
Authority: US
Publication date: 1919-12-02
Anticipated expiration: 1936-12-02

Description

L. L. MARTIN.

DOME FASTENER MACHINE.

APPLICATION FILED nic. I6. me.

1,323,482.. Patented Dee. 2,1919.

6 SHEETS-SHEET l.

L. L. MARTIN.

DOME FASTENER MACHINE.

APPLICATION FILED DEC. I6. Isla.

1,323,482. Patent-ed Dec. 2,1919.

6 SHEETS-SHEET 2 nv/eniot .m4/wz.;

I by L. vL. MARYIN.

DOME f ASTENER MACHINE. APPLICATION FILED DEC. I6. |918.

1,323,482. Patented Dee. 2,1919.

6 SHEETS-SHEET 3.

Inventor. @XXVI/mii L. L. MARTIN.

DOME FASTENER MACHINE. APPLICATION man nEc. 16. 191s.

1,323,482. Patented Dec. 2,1919.

6 SHEETS-SHEET 4.

Inventor. g .2", .Afa/L.;

L. L. MARHN. nome FASTENER MACHINE. Arrucmou meu Dec. 1e. um.

Patented Dec. 2,1919.

GSSHEETS-SHEET 5.

L. L. MARTIN.

noms FASTENER MACHINE.

APPLICATION FILED DEC- 15.*l9l8.

Patented Deb. 2,1919.

6 SHEETS-SHEET 6.

mi 1.30 154 5o Inventor: 1. f1/742i proved apparatus.

LoUIs L. MARTIN, .oF 'roRonro, oNTARIo CANADA.

nonni-res'renna Macturni. .i

To all whom t may concern: Bo it known that I, Louis LINNEAUS liften-j` TIN, a subject of the King yof Great'Britain, and resident or". the city of Toronto, county otork, Province of Ontario, in the Dominion of'Canada, have invented certain-new and useful Improvements in Dome-Fastener Machines, as described in the following specication and illustrated in the accompanying drawings, that form part' of the same. The principal obj ects of this inventionare', to devise an automatically operating ma.-

' chine to perform the various operations requisite to produce a dome fastener 1n which the operations follow successively. in the passage of a ribbon of metal throughjthe machine. Y A further object is to devise a machine of Ver)v compact form which Will operate 'With great rapidity and accuracy.

The principal features of the invention consist in the novel construction and a1" rangement ot parts, whereby 'a ribbon of metal lis fed through a succession of dies and the metal is drawn into' the shape of a dome` head and termed with a narrow 'neck portion by a spinning member Whichisfoperated in unison with the operation of the various punches to grip and reduce the metal of the neck portion of thefastener at the proper period and whereby the metal is cleared from the dies b y a positive'action effected through the movement of the punches, the whole beingaccomplished in the manner hereinafter described in detail.

l'n the drawings, Figure 1 is a front elevational view of a press equipped with my im- F ig. 2 is a side elevational viewof a press illustrated in Fig. 1 and showing the operi ating mechanism for the spinning device and the arrangement of the sub-press upon th larger press.

Fig.- 3 is an enlarged end elevational view of the sub-press and its operating mechanism. Fig. l is a longitudinal sectional View through the center of the forming dies.

'Fig-5 is a. cross sectional view through thesub-press showing the mechanism for operating the .spinner tool.

Fig. 6 is an enlarged side elevational view or' the device for feeding the metal strip;

' is Aa section specification ofrlett'er'srtntf '.BatentedDec, 1919. application filed n'eember 16,'- 1918.v :semaine 267,006.

ll vieiv through Fig.- i 6 on the/line I z F ig." 8 is a detail of the clutch oit the feed mechanism: il#

The device constituting the present invention is 4here'in shown applied to a punch presshaving a base 1' supported upon the' legs 2*'and-'a' frame 3 rising from the base and supporting lthe `ram eL-and its' operating legs'2'and upon the frame 7 axially below the ram 4" is 'arranged' f'aframe '8 supporting a mounted upon the table of vertical spindle '9 and upon this spindle is i mounted a grooved pulley 10.

' A gro'ovedpulley 11 is mounted upon a bracketf112 atx the rea'r'of the'frame 7 and is arranged in horizontal alinement with the pulley 10 and a belt 13 connects said pulleys.

The shaft 14% of 'the' pulley '11 extends 11p- Wardlyjthrough' a bearingl and at its upper'end is provided i'vithal universal joint 16 which connectsivith a shaft'17.

"A friction pulley-'18 is mounted on the upperend offth'eshaft 17 and 'is adapted to engagefthe' outer-'fac'e-of the' main pulley' of the press to convey the rotating'motion to the vertical spindle 9.

A collar 19 encircles' the upper end of-the shaft 17 'and this shaft is connected by the cap' screw. 20 with abar 21 slidably varrangedupon'the frame 3.

A lock wheel 22 is arranged at the forward end of the bar 21 having a pin 23 adapted to engage the notched end of the bar to hold it securely in the'positio'n with the pulley lSclearlof the pulley-5.

A coil spring 24: is' `secured at one end to the cap 4screw-2and at the other end to the lixed screw 25 and this spring has the tendf 18' into contact 'ency OfdraWing the 1' pulley with the main pulley 5.

A handle 26`isarrai1gedon'the side of the bar 21 .for operating-it.

A clutch member 27 yof an ordinary type is arranged upon the press and is controlled by the handle 28. A stop member in' theform of Aa projecting :arm 29 is secured upon the bar 2l'and 1' prevents the. operation otthe clutch until the 21g-'lies' beenreleasech'to move to its forward position to effect the operatiQnMofh punch bloclrvx and y operating in the cani the spindle 9.

The sub-press 6i'is" shown as la' 'uniti-n' Figs. 3 and 4 and compr1ses. bas e ,30.

which is secured to the base l of the main 31 :supporting al ram headg 32.

33 is a die block secured upon thebase;

30 and formed with a row of counter-bored A circularoriices 34T. and. in these orilicesare arranged theA dies 35, 36, 37 ,.38 and 39. '1. circular space.;40f isarranged between the dies 38 and 39 for a purpose Whichwill hereinafter appear.

circular dieblock 41 is 4arranged ina recess. 42. in the -bloclr 33 having its surface inlinegwvith thesurfacie ofthe dies 351130. 39j. 'fllhedetailsbf this dieA block will be hereinafter described. f 5

- A Ip'late43 rests upon thetop ofthe die vblbckgand is formed with alongitudinal recess 1-4in: the underside.A A 1pair of strip-- per plates 45 are secured to the underside of the -pllate43-and extend inward-ly :beyond the side' walls ofthe recess 44. rlhe metal strip` A from which the: dome fasteners are made is: a width corresponding. to the widthoatthe recess 44 and is adapted to slide therethrough. The. dies .are of a progressive nature l adapted told-raw the-metal ot' the stripintoa teat and suitable punches46, 47 and 48 are secured in theblock 49 secured. to. theera-m ov-fslgirlably arranged in the ram head 32.

' These :punchesdraw the meta-l of; .the metal wardly to roll-upon the surface 'of thearm as the cam plate isswung-inwardly on its p.ivotbut..the heel portion -56 engages the anmsothat upon the-cam platebeing swung outwardly on its pivot the armV will be tilted inlits bearing in thelugs 153 thereby lifting the plate 43 and the stripper plates 45 to engage'tihemetal.strip-being formed. and lift it clear of the dies .-so..that-it1nay' be fed forward -t-hroughthe die block Athe requisite distance-forfthe next operation.

The cam plates 54 extend upwardlypast th'eiends @ft-he, punch 'block 49 and the inner faeesgare :tormedwith cam grooves 57 which extend vin a downward sweeping curve. from the inner edges Atof a horizontali openlng.

5.3 `.are pins secured 1n the ends of the As theblock moves downwardly the pins engaging the inward face of the cam grooves' tilt the cam plates on their pivots and when the pins 'reach the bottom of the grooves the -coil springs 59,; swing outwardly, thus bringing the upwardly curved portions 60 of the cam grooves-.immediately .over-.fthe plus: r

- 'As the: punclrblock; moves upwardly the pins-58 engage the cani surfaces-60 and tilt the caml plates outwardly-so that the heel portions56 engaging the arms 52 lift the stripper plate. 1

ln the center of the length of the plate 43 and atzthe'side adjacent to the frame 31 of thesub-press is arranged a hardened steel anvil 61 and a lever 62 pivotally supported in the lugs 63 is held in spring Contact with said anvil' by the-spiral spring 64 to hold the-plate 43 down against the die plate. The-pressure of this lever isexerted upon one side ofthe stripper plate and. in order iso-:balance the lsaid-plate andv keep it in a horizontal position a pair of lever arms 65 arearranged one at each end and pivotally supported. in lugs 66 and extend across the stripper plate Veach havinga downwardly turned end 67 engaging the plate on the'side 'opposite to the anvil 61.

Spiral' springs A68 are connected to the opposite ends-otl theseleyers- 65 toexert a downward pressure against the plate.

llhe center lever 62 performs a double unctionin that. it bears upon the anvil 61 and extends .inwardly over the center of the plate 43, the 'inner end 69 thereof being rounded. 1 v

A cylindrical block 7() is slidably arranged in the supplementary block 71 secured to the-plate 43 centrally and this cylindrical block is provided with a transverse slot 72 near its upper end into which the rounded end 69 et the lever 62 extends. The bottom end of the cylindrical block bears upon the metal strip A while the neck of the dome is being formed by the spinning apparatus which 4has not yet been described.

A pairf otcylindricalblooks 73 and 74 are mountednn either side vof the central block 70 in the supplementary block 71 and are held downwardly inY Contact with the metal strip A by means of levers correspendingr exactly with the lever 62.

The dies 35, 36 and 37 are forming dies and thedies 38 Vand 39 are practically positioning -dies but the

blocks

73 and 74 per form the func-tion of tools for eliminating. any inequalities in the surface of the metal. strip `caused through the drawing operations. i

iro

veo

.arrangedin the 98: isfwjawshaped membempvotally supthrouglrthe holder 75, thej.-japyfends 'of;said member.v fb avng f the slets,k flOO i' engaging the o'ff'thebfpress'n'eentral alinem'ent s'h the 'holder 7 5f :said bleek 'having' if a "argfdbloliOfbayng a" beveledl under surface adapted tofengage the roller 103. of

l I :ablysupport'ed vupon aplate 120 111101115 Aspmdle 78`and thevupperiedge;theref:enqdazpted' to' engage; the beveled'f'prbjeetion gages the beveled outr-f's'urfaeesfof-the 'adapted to engagethe? depressed feat inthe ported upon a pm 99fextendngftransversely 131115795Y of: the eollletv operating I eollar 9.5; f

jaw me1njber98 :is providedl Wthagpi'votal bracket 118 and the bar 115 swings outwardly on its pivot and moves clear of the pin 114 and the ram continues its downward movement` The member' 109 is immediately returned to its normal position by the upward pull of the spiral spring 120 and the jaw member 98 and the collet operated thereby is returned to its lower position by means of the springs 123.

The die block 41 is formed to coperate with the punches 124, and 126, the punch 124 perforating the stitching holes. The punch 125 forms an lannular rib around the central dome and the punch 126 cuts the finished article from the strip.

The ram operates with a regular reciprocating action carrying the punch block and punches and in each reciprocation each punch performs its particular operation. The punch cooperating with the die 35 makes the first impression in the metal. The next punch and die draws the metal farther and a' still further drawing action is effected in the third punch and die forming a v'prominently' projecting straightwalled teat. In the fourth die the teat enters the recess therein and the bloek73 is brought into engagement with the upper surface of the metal stri-p by the action of the spring lever 62, said block forming a ioating punch.

A short punch 127 is adapted to engage the .block 73 just at the period when the other punches havev completed their stroke so that any inequalities in the surface of the metal around the te-at caused by the drawing of the metal will be effaced.

The central block 70 is held in contact with the metal strip by the central lever 62 while the spinning of the neck occurs and the block 74 is spring held against the strip A to hold it in the die 39 which is merely a locating die. The next punch perforates the thread holes in the metal as described and following this the punch 125 forms the annular rib and the completed blank is cut out by the die 126 and falls through an opening 128 into a chute 129 which delivers the finished article from the machine.

The various operations occur simultaneously and on each upstroke of the punches the metal strip is lifted clear of the dies by the stripper plate operating in the manner described and simultaneously the metal strip is fed through the die block the required distance. In the upward movement ofthe stripper plate the anvil 61 engages the lever 62 and the corresponding levers operating the blocks -73 and 74. at a point on the inward side of their pivot and tilting said leverson their pivots so that the inner ends lift upwardly with a movement faster thanlth'e movement tof the plate thereby lifting therblocksfor floating punches clear of the metal stripA.

Inversely the downward-movement of t Heating punches or blocks is accomplish with a rapid movement in advance of t movement of the main punches so that t metal strip. will be held in positive rel tion to the spinning die.

The feeding of the metal strip A is e fected by the operation of a pair of fel rolls 130 and. 131 which carry intermeshii gears 130.and 131. These. rolls are mour ed in a frame 132 secured upon the base the sub-press, the journals for the low roller being held stationary in said frar and the journals for the upper roller beii formed in the

blocks

133 and 134 which a slidably supported in the frame.

A plate 135` is arranged above the bloc. 133 and 134 androller bearings 13.6 are a ranged on. the under. side thereof.

AL compressionlspring 137 is mounted i the top. of the plate 135 and an adjustii screw. 138 threaded on-the top ofthe frar adjusts the pressureiof the spring.

The 'lower feed roll is. preferably; fornn with .aconcaved periphery and theupp roll =13l1iscorrespondingly convexe'd so th the ribbonV or 'strifp ofthin sheet met which is :fedfbetween ,the rolls is bent tran verselyy thus stiifening the metal again the. distorting effect caused by theV acti of the dies.

The'block134 is provided with a oyli dricall extension v139 .which is .recessed in tl outer side to form a clutch surface and clutch disk 140 is rotatably. mounted on tl outer end ofthe spindle-'141 of the upp rOllei.'

A clutch me ber 142 is arranged with the disk 140 vand is keyed to the spindle 1l anda; similar clutch member 143 is al; keyed 'to the spindle and arranged with: the cylindrical extension 139.-

Ball clutches 144 and 145-are arrang between the clutch members and their r spective-'disks to -operate in the mann hereinafter described.

An arm; 146 is pivotally mounted inte mediate of yits length upon the frame 12 and one end thereof is connected to tl clutch disk 140 by 'a connecting rod 14 The punch block 49' isl provided with roller 148 which is adapted to engage tl opposite end of the arm 146 to swing sa: arm on its pivot as the punches move uj wardly.

A coil tension spring 149 is connected the arm 146l to draw it downwardly as tl punch block' moves down.

In the operation of the feed apparatu as the punch blockv moves upwardly t] roller 148 tilts the arm 146A pushing dow: Awardly on the connecting rod 147 and tur ing 'the clutch disk 140. As the clutch di: turns it' binds upon the ball clutch membe and rotates the clutch member 142 therel turning the feedf roller spindlejthe required distance to feed the metal strip forward, this operation beingtimed :to synchronize with the lifting of the stripper late.t f The secondary `clutch holds, the spindle from turningV backwardas the operation ofthe arm ld..reverses. A The Amovementofthe clutch 1452 and consequently the movement of the feedrolls ,is regulated byi meansl ofan adjusting screw 150 mounted on la' bracket 151 on the top of the frame, 'said radjusting screw limiting the upward `svi/.ing 'of -the arm. Y, f In the operation of this machine, the metal from which the fasteners are made is carried upon a suitable reel andpassing-- through' the feed rolls is bent intoconcaved 4. foim.- The strip entends into the longitudinal orifice in the plate 43 passing over the `tops of the dies In the first downwardimovementofthe press the metal isdrawn vinto the rst diel in the manner shown and-described. Asthe ram rises -theplate 4B`is lifted` b y meansf of the cani plates 54: to vliftthe: drawnI part of the metal clear of the ASurface .the dies. While the ,stripper plate is thus lraisedthe continuing-upward movement of the ram op-` erates the feedfmechanism lin thejmanner described to move vthe metal'strip forward the required distance so that thedepression in the strip is brought into alinement with the `depressionin the second die, As the second operation is performed the first -operation commences in the second position on the strip. This operation is repeated until the portion of the strip having thefdownwardly formed teat comes oppositethe central openingwhere the spinningl die is located and as the punchmoves downwardly the reciprocating member 109 operatesthe mechanism described/to' close the -Spinnin die jaws in upon the metal toform the nec of the fastener;V When Ythis spinning has been accomplished the colletis released from the spinning jaws by the operation 'of the bar 115 and the operating parts are returned to normal. The dies arranged each side of the spinning die are principally for the 'purpose of properly locating tlie'teat being op erated upon -by the spinner `but thejanvll punches serve to rectify any slight inaccuracies in the metal.

As the metal strip is further advanced the perforating punch operates to cut'the sewing holesthrough the metal and the'. next succeeding die and punch stampthe metal surrounding the head into a raised annular rib and shoulder andincidentally true up .the metal and hardening and dishing the metal fastener to impart strength and rigidity thereto. The final operation punches the finished article from the strip. The spinning die spindle 9 operates continuouslywhile the machine is in operationfbut when the maf chine is stopped the spinning mechanism by thesliding bar 21 upon its other Aplace o fisafety ywhen not in operation.

.v' What Iclaimasmy invention is zl,t In a dome fastener machine, a plurality of dies arrangedin succession and adapted to draw themet'al into 'a teat formation, anda vspinning .die adapted to constrict the metal of theteat tofform a neck. 2. :In a dome fastener machine,'a plurality of dies arranged to perform a succession'of operations toshape a strip of-metal, punches oo perating 'in unison withsaid dies, means definitely operatedthrough the operation'of the punches for'flifting the metal strip clear of lthe dies, andmeans operated .by the 'operation of the punches for feeding the metal a predetermined distance when in its raised position.

l3.'.In a dome fastener machine, the combinationwith the dies, of a reciprocating ram, punches carried' by said ram, a spinning die, and means operated bythe movement of said -ramfor bringing'said spinning die into operating contact with the metal to be formed.

4. Ina dome fastener machine, a plurality of dies, a plurality of punches adapted to effect the'drawing of the'metal into a teat formation, .a spindle constantly rotated, Va pair of jawfshaped fdies mounted on said vspindle and adapted to be moved into pressure engagement with the walls of said teat tol constrict the metal into a neck formation, means for operating said jaw members in coincidence vwith the downward inovementof said punches, land means for withdrawing said jaw members prior to the completion of the action of the punches. c

5. In a dome fastener-machine', a plural# ity of dies arranged in a stationary die block, a reciprocating ram, punches coperating with said dies secured in the punch block von said ram, 'a Vertical spindle arranged bcneath 'said die block, jaw members secured to the top of Vsaid spindle and adapted to be swung inwardly Aand outwardly thereon and having inwardlyturned flanged portions adapted to engage the side wallsof the metal teat formed by the 'adjacent,dies, means for constantly' rotating said spindle, a vertically slidablc collet encircling said spindle and adapted to move said jaws' inwardly, means operated by the downward movement of; the ram for operating said collet to close said jaws inwardly; and, mea-ns or, auto1 matically gdisengaging said colletfope'rating ico means from the; 15am' prior tol "the completion oitsdoivnward Stroke dies, 'means 'for' A'constantly' 'rotating said spiridlje, a" verticallyfslidable collet encircling :said 'spindle and adapted 'te move said Jaws inwardly, a llevern'ioun'tefd on. aziXed plvet and having one end o 'eratlvely 4connectedwitlr said collet, a ver really reciproeating member operatively connected 'with' said 'lever, "a;pivotalfbar secured to the'upi per'cnd fsaidfieciprocating member, a pill secured: in'thej' ramfand 'operatively engaging saidI vbfa'r'pin V.its j downward stroke, and' means for swingingsaid' 'pivotal' 'bar out of engage- Vment with'said pin intermediate of 'the stroke of the ram.

7.111 a dome fastener machine` a plurality 'of dies' larranged -in the stationary die block, a reciprocatingjram, punches coperatingwith said dies secured'in the punch block on 'said ram, a `vertical spindle arranged beneathsaiddie bleek, jaw'members secured to 'the top of said "spindle and adapted to be 'swung inwardly and outwardly thereon and having inwardly turned flanged portions adapted l'to `engag-e the side walls ofthe metal teat formed byf' the :adjacent r'dies, `means for constantly'rotating said spindle, a vertically slidable collet: 'encircling 'said spindle and adaptedto'move said jaws inwardly, a levermounted .o n a liked pivot and having one end'eperatively connected with'said vcollet, a horizontally slidable member 'engag- ,ing'the freeend of 'said 'lever and swinging on` itsvpivot to raise the collet, a vertically reciprocating member havinga beveled end engaging said horizontally slidable member, alpivotal. arm mounted on the upper-'end of said reciprocating member, a pin secured in the .ram and-engaging. said pivotal arm,'and means adapted to swing said pivotal Yarm to disengage from said pin intermediate of the stroke of the ram. 8.,.ln a dome fastener machine, a pluralitypffdies arranged in the stationary die block,`a'reciprocating ram, punches coperating with said dies secured inthe punch block on said ram, a vertical spindle arranged beneath said. die block, jaw members secured to the top of said spindle and adapted to be swung inwardly and outwardly there@ and having inwardly turned. flanged portions 'adapte'dto engage the side-wallsof the metal teatfform'ed by the adjacent dies', means -for constantly rotating said spindle, a vertically slidablecollet encircling said spindle and adapted to move said jaws inwardly, a lever mounted on a fixed pivot and having oneend operatively connected 'with said collet, af vertical' reciprocating member adapted to operate saidlever to 'raise said collet, an'arm pivotally -mounted on the upper end of said reciprocating member, a pin secured in the ram and engaging the upper end of said arm, a cam projection on said arm, and an adjustableobstructing member adapted toengafge Esaid" cam to ``'swing 1it' on its pivot :to disengage from said' pin intermediate' ofthe stroke' of; the ram.

9. In a dome v'fastener machine, a pluralityfo'f tdies l'arranged in the "stationary die. block',"a reciprocating ram, unchescoper ating with said diessecure in Atliepunch block lon-"said ram, al vertical spindle ar ranged beneath said a'die block, awmembers secured to thel top ofsaid spindleand'fadapt ed .tobe swung inwardly and 4outwardly thereonand having inwardlyturned flanged portions'adapted'ltofengagethe side Walls of the metal teat .formed by the adjacent dies, means for constantly rotating said spindle, a vertically slidable collet encircling said spindle and adapted to move said-jaws inwardly, a lever mounted' on a 'fixed ,pivot and having one end4 operatively connected with said collet, a vertically-reciprocating member adapted 'toi1 operate. said lever to raise said collet, an arm pivotally mounted on the upper end of said reciprocating member and adapted toswing laterally in one direction, a spring holding'gsaid ,arm in its vertical position, a ,cam projection on the side of said armadjacentto the spring, an adjustable bracket adapted to engagev the cam on saidpivotal arm: to draw it out of engagement with the pin onthe ram intermediate ofthe stroke of the ram.

1Q. -A dome fastener machine, comprising, .a lpunch press,I a spindle .vertically mounted beneathtythe base Yof the press, means vfor rotating said s pindle,fasubpr`ess having a ram j operatively connected with the ram ofithe main press, diesin the sub press for shaping the fastener, a'spinninfr die operatively connected with said vertica spindle and adapted to form "the neck of the' fastener, means for controlling the rotation ofthe spindle and spinning die, and means connected with said controlling means for locking the4 main press Vwhen the vertical spindleris out of operation.

11. In a dome fastener machine, the combination with .a punch press, of a vertical i spindle' rotatably. mounted beneath the body of thepress, a-verticaliflexible sha'ftoperatively connected withsaid spindlea friction Wheel mounted on the upper end of' said iiexible shaft and adaptedl to frictionally l'en- I gagethedrive :wheel eoffthe: press, means for holding said friction wheel in Contact ,gwith` the!I ress wheel,means:-fr f holdingfsaid friction- :wheel out 'of Iengagement Y with: z said pre'sswvheel, 'air sulopress inountede-on" the table of.- the punch presshaving.y a plurality ordiesfandepunchespaspinning; die :for forming thenecl; of thefastener', meansrcom necting the 'vertic'alspindle mOu'nted-on the press with said Spinnin Edie', andfmeansffor lockingthe :controlmec anismp-of the press when the spinning mechanisrnis Idisengaged from' thepress pulley.; A1,' 12.. In a dome fastenermachinexthe come; bination-With va punch press, of ra vertical spindle rotatably mopmtedfbe'neath" the body f .the press, af vvertical flexible .shaft ioperatively; connected with said spindle,- a .fric-v tion wheel mounted on the upper. end of said iexiblef'shagft' andadapted tofrictionally engage thei-.drivewheeh:of the` press, a 'bar slidably?'supported Aonnthe press,fa1'1d piv otallyvfconnected to itlie=.uppe rr endof isaid flexible zshaftg-,ar spiralelspring having ,one end fixed: I,to the? lpress ,1 and.4 the; other end to the slidable member, means .forlocking said slid-` able bar.; -ihz-fa-positi0neholdi11g n the.. friction wheel outinfn-operating; Contact, a f clutch mechanism; for; controlling the -punch press, anjarm'secured to saidshdable bar and enga gin g. said clutchl mechanism ,to prevent its operation whenthe.friction wheel is yout of contactf'with l the. press wheel, a sub-,press mountedpn punch press andoperated v3.5 thereby, andl afspinning die-secured--to said verticali spindle y and ladapted A to form the neckofthefastener. *n l 13. Adgmej fastener machinefcomprising a punch press having a reciprocating'ram, 40 a .die,.,block.and dies.. mounted therein, a punch block.,.s ecured" to the .ram having punches secured therein. coperatin with said dies, a plat/e extending over `said dies `andhaving alongitudinal recess. through which the metal `strip passes,l spring means holding said plate down upon said die block, and means operatively connected withfsaid rain for lifting said plate in the receding motion ofthe 'ram. `vvl 14. A dome fastener machine, comprising, a punch press having a reciprocating ram, a die block anddies mounted-.therein, `a punclrblockzsecured to the ram having punches secured .therein cooperating with ..55 saidI dies, a plate extending-over said dies andv having aV longitudinal recess through which the metal strip passes, spring means holding said plate .down upon said die block, an arm pivotally supported from the die block and V connected with said plate, afcam mounted on the pivot ofv saidarm, and a pin projecting fromthepunchblock and engaging said. :cam and adapted1to. tilt said cam independent of the arm in the,down Ward movement of theA punch block and-.to

tiltlsaid'Cain:andeffectxthe swinging of lthe arm fupon its pivot'v tol lift the plate connected theretoton theujpward increment of. thelram, nl Y f l d5, A dome fastenermachine, comprising, a punch press having a reciprocating ifa-mg, die bloclrand dies mounted therein, apunch block secured Itof the -ram having :punches seigiredtherein cooperating with said dies, a plate-extending over said -diesandhaving 75 a longitudinal recess Vthrouglin whichthe lnetal strip' passes,- spring means holding said plate don-n upon said die block, a pair of arms -pivotally connected at their inner ends yto said plate and pivotally mounted in- 8o tei-mediate of their length upon fixed pivots,` cam -platesniounted on theixed pivots of said arms thaving-portions extending over saidarms and araptedto swing freely inwardly'and upon being swung outwardly .to 85 tilt said arms on their pivotsto lift the plate and pins projecting from thef punch fblock extendinginto the cam grooves in said cams and adapted to swing saidcamsoutwardly totilt the armsupon the upward movement of the ram.. y

1G. A.' dome fastener machine, comprising a press, a die block mounted en the base of. said press, dies mounted ins-aid block, a plate resting .on said die block and having a longitudinal recess adapted to receive the metal strip from which the fastenersuare made and having inwardly proj ectingstripper plates onkthe bottom, a plurality .y of pivotal arms-mounted on fixed pivots engaging one side of said plate and spring held thereto, floating blocks slidalolyl arranged in said plate and operatively connected 'with the inner endsv of said levers, counterhalancing levers supported :on fixed pivots and engaging said plate at the opposite side thereof from the point of contact of the aforesaid pivotal levers and counterhalancing the spring pressure thereon, a rani, punches secured to said-ram, 1.10 and` means operativelv connected with said ram for lifting said plate'and the floating blocks coincident with the; upward move.- ment of the ram. r

17. A dome fastener machine, comprising,

a press having a die block supported` in the base and a ram kcarrying :cooperating punches, a guide plate extending over said punches adapted vto receivea stripof metal, ineans for lifting said guide plate coincident with-the raising motion of the ram, Vand means for feeding the instal strip .a-predetermined distance coincident with the raising motion of the rain. I v. n

18. A dome fastener-machine, comprising, 12.5 a press having a die block supported in the base land a 'ram carrying coperating punches; a guide plate extending over said punches `adapted toreceive a strip of metal, means j for' lifting said' Vguide plate coinci- 130 dent with' the raising motion of theY ram, 5a' pair of feed lrollslinountedfadjacent,to the' die block, an ar'm'fpivotally mounted intermediate of its length having one ern'd'fop` erativelyconnected to -rotate said feed rolls, the other end being engaged the upward, moving ramitooperatefsaidfeedrolls; if

19.A A dome fastener m'achine`,comprising, a press having -a 4diev'lolock supported in :the base *and a ramA carryingl'cop'erating punches, a guideplateextending over said punches adapted 'tofre'ceive astrip o`f metal, means for'lifting said guide platefcoincident with the raising motion 'of'the ram-,- means-for feeding the metall stripiaj'predetermined distancecoincidentwith the -r'aising motion of the ram, and I'm'eansfor regu lating. the'movement of said pivotalarm-I'.' 20. vA dome fastener machine, comprising, a -press 4'having a die block supportedinthe base and a* ram carrying y-e'op'erati'ng punches, a guide plate 'extending` over? said punches, adapted to receive `a stripffof(metal,l means `for lifting said guide plate'oincident with the raising motion of "the:V af "pair of feed rolls mounted adjacent ttthe fdiev block, a; clutcli mounted -f en;y thef'spindle fofone v of said feedgrollsfaflevei" pivotally mounted intermediate of-its "flengtlrand hav-v ing one end adapted to'be'engaged-inthe upward movement ofthe ram' tofs'wi'n' fit on its' pivot, jan arm 'connected tothe ot er end off said lever and operatively connected to said clutch to rotat'ethe saine andi'to effect the rotation of the'feed rolls, andnieans for preventing the backward rotationf'of the feed rolls.v f f,

21. A' dome fastener machine; comprising, a press having a die block supported inthe base and `a 'ram carrying? 'coperatinw punches, a guide plate extending over'sai punches adapted to receive a strip'of met-al, meansv for liftin said guide; plate coincident with the .ralsingimotion lof the ram, a frame secured to the base ofthe press, a roller mounted in fixed bearings in said frame, a roller mounted in vertically slidable bearings above the aforesaid roller', va clutch casing fixed to one ofthe" slidable bearings ofthe upper feed roll, a clutch disk fixed tothe spindle of the upper -feed roll, a secondjc'lutch "disk` mounted on the spindle of the upper feed roll, a clutchfca'sing rotatably mounted onsaid spindlefand' encircling the lsecond clutch disk, lrollerclutch members arranged vbetween said 'disks and their inclosing casings, 'a lever v'pivotally mounted on saidframe intermediate of'its length, an arm connec'rti'ngl the'l'rotata'ble clutch casing to' one end of said lever, a pin mountedon-the ram of saidfpress andenfgaging the'otherend of said leverin its upward movement, al spring for retracting said lever on the ldownward movement "of the ram', and: an adjustableI stop ffor limiting-the engaging: the pin? on'the ram.'z 'i '-'22. 'A kldome fastenernmaohine, compris,

ing; a apress havinga vdie block supported in the baseband: av rain carrying .coperating punohes',g a. guide. .plate extending @over .said punches adaptedfto receive a strip .of metal, meansfifor' lifting said; guide plate coincidentfwith'ltherais'ing motionzof the ram, a frame'securedv to'thebase of the press, a rol-ler mounted 1vinzlxed bearings in said fraindf'bearingrblockswertically slidable in said frame, a roller mounted in said slidable block;adjustablel spring pressure means-for holding saidl rollers sin contact, means op-y erati'ng i throug'lr theupward movement .of th'e'ramL for rotating the upward roller, and meansfor Yregulating the' throw of vsaid opvf23, vInf a: dome "fastener machine, ther combinationrwitlr'a' v punch'- press, .of a feed rn'ecjzhjan'ismV comprising apair of rollers hav ing-*transversely"curved matching surfaces, meanssfor'fholding@said rollers in pressure Contact; IneanSF--forfotating said rollers coineident'withltheupward `movement of the p r'ess'ram, andmeans for regulating the movement offs'aid rotative means.

- '24;Inia'doine fastener machine in combination a' reciprocating press, a plurality of dies-arrangedlon the bed of the said press and'adapt'edto draw the metal in a successionfofffoperati'ons, means for Yholding the metalfstripin contact with said dies, means for'definite'ly lifting themetal clear of said 'dies loperatin`g"`in synchronism with' the raising of the punches, and meansfcr feeding' the metal strip in synchronism with saidT lifting means.

25.I Ima dome fastener machine, a plurality ofidies arranged in succession, a plurality of punches adapted to draw the metal into aj 'teat" formation, a spinning die adapted constrict the metal of the teat tofferma "neck, 'a' floating punch operatingdndependently of the main punches adapted `to'hld the metal to the'spinning die',l and means for operating said floating punch independent of the main punches.

"26.1Infa. domev fastener machine, a pluralityof dies arranged in succession, a plu ralityof'punches':adapted to draw the metal into 'a teat formation",4 ai spinning die adaptedt to' constrict' themetall of the teat to form a neck,fa=floating' punch operating independently' of the'inain punches adapted to Vholdthe metalwto' the spinning die, Aa lever supported upon'a fixed pivot and voperatively connected with said Heating die, and means adapted to, engage said lever intermediately between its pivot and its point of contact 'with' the floatingpuneh yto swing said lever-"upwardly on its pivot to lraise thev punch. l 27. 11n-ila! domeffastener machine, a plu-` ralty of dies and punches arranged to draw operated to hold said Heating punoh in conthe metal in a succession of operations into tact with the metal being formed, and means 10 a teat formation, a holder Vfor holding the operated through the lifting of the holder metal strip over said dies,` means operated for engaging said lever and causing it to upon the raising oi the punch for lifting lift thefloatingpunoh Vwith an accelerated the holder to clear the metal from the dies, movement. a floating puneli supported in said holder,v Y

a lever mounted on a fixed pivot and spring L. L. MARTIN.