US948382A - Automatic attachment for withdrawing punchings from punching-machines. - Google Patents

Description

, C. SCOTT 5; E. L. G ALE, Sn. AUTOMATIQ ATTACHMENT Foa WITHDBAWING PUHGHINGS mom -UHCHING Hmmm. APPLIGATIOE TILED HAR. 30, 1906.

Patente Feh, 1910.

imams-SHEET 1.

m@ Mw f awww@ Je I Snowy@ G. SCOTT & E. L. GLLB, Sn. AUTDMATIU TMCHMBNT POR WITHDRAWING PUNGHINGS FROM PUNGHING MACHINES.

APPLICATION YILED MABG, 1906.

Pa/tented Feb. 8, 1910. 3 SHEETS-SHEET 2.

C. SCOTT d; E. L. GALE, Sa. 'AUTOMATIC Hummm for; WITHDRAWING PUNGHlRGS'PRoM PUNGHING MACHINES.

Patentd Feb.s,1910.

3 SHEETS-SHEET 3.

LPLIGATIOH FILED MAB. 30, 190B.

i so

. with our invention applied thereto; Fig. 2

. tion; Figs. 4 and are Views of an autol diagram of the circuits and connections:

'machines with sa ety.

CAMPBELL SCOTT AND ERNEST L. GALE, SR.

OTS ELEVATOR COMPANY, OF JERSEY NEYV JERSEY.

. 0F YONKERS. NEW YORK, ASSIGNORS TO CITY, NEW JERSEY, A CORPORATION OF AUTOMATIC ATTACHMENT FOR VJITHDBAWLNG PUNCHINGS FROM PUNCHING- MACHINES.

Specification of Lettera Patent. *li-i vPatented Feb. S, 1910.

Application led March 30, 1908. Serial No. 308,982.

To all whom it may concern.

Be it known that We, CAMPBELL Scorr and ERNEST L. Gann, Sr., residing at. Yonkers. in the county of lestchester and State of New York, have invented a new and useul improvement in Automatic Attachments for ll'ithdraiving Punchings from Punching-Nadunes, of which the following is a specitication.

Oni' invention relatesto pick- Otis :for punching machines and one of its objects is the provision of simple and etiicicut inc-ans for withdrawing uuiicliings from punching A iiirt-lier object. of our invention is the provision of automatic electro-mechanical apparatus for removing the puiicliings from a punching machine.

Another object of 'the present invention is the provision of positive means for removing the pick-ott' from under the punch to preient said pick-oli' from beinff injured.

A iiitlicr object is to provide in combi nation with an automatic pick-ott device, a plurality of cutters to entirely sever the scrap from the material inserted when a punching is made.

Other ohjccts of our invention will appear hereinafter, the novel combination of elements being pointed out in the claims.

In the accompanying` drawings Figure l represents in elevation. a punching machine represents a plan view of the die of the piincliinzgy machine. and also our improved attachment: Fig. 3 is a View similar to Fig.- 2 lmt showing the pick-oil' in another posimatic electric switch that may be used it' desired; Fig. G serres to illustrate one form of butter device that may be used as hereinafter explained: Fig. 7 represents a wiring Fig. S is an elevational View of a modification in that the operating device for thel pick-ott` is entirely mechanical; Fig. 9 i represents a plan view similar to Figs. 2 l and il but showing the mechanical construc- 'l tion of Fig. 8: und Figs. 10 and 1l are detailed views of the cutters that may be used l for separating the scrap entirely from the l material inserted each time a punching is! made.

Referring to. Fig. l, S designates .the standard or ,suppe-rt :it-the upper end of which is mounted the shaft, l to which is secured the pulley P. B designates a belt connecting some source of power with the nuliey P, which latter transmits the power to the shaft l, and to the mechanism operated thereby, for actuating the punch carrier Any suitable type of punching machine may be used, and such a machine is not, shown complete in the. drawings for the reason that. various kinds are Well known to thoseV skilled in the art.

6 designates a hed rier 4, the die D] being shown in Fig. 2. Obviously this die may he of any shape de sired and the punch made to correspond,

thereto. In this instancea circular die is shown with a central opening 5 so that the punching machine will produce laininations for an arii'iatiire of a dynainoelectric machine. Ain): suitahle means may he used for securinpY the dies in placel and makinp,ir them removable or adjustable.

IPivoted at 2 to the frame of the punching7 machine is the lever L, the upper arm of which is adapted to he struck by the cani C Secured to the shaft l. The lower end of the lever L carries an arm 29 which is provided with a slot Il() at its outer end. and through this slot projects a pin SG which is secured to the outer end of the lever 2S. Connected to the same pin is a link 3:2 slotted at 3l so as to have some lost motion at certain times. The liiil; 32 is pivoted at to the arm l0 carrying thc pick-ott device Si' at its outer xend. The pick-eti dciice in this instance comprises an electro-magnet l5 provided with comparatively long poles lt". 16, which are adapted to pick up the'punching and scrap l) and 48. respectively, when the magg net is energized.

`when the punching machine is operated and tne shaft l makes a complete revolution, the cam C strikes the lever L and moves the arin Q9 to the left. For a certain period of time there is a free motion of said arin 29 by reason of the slot 30 in the outer end thereof. lfhen, however. the outer end of the slot is reached, pin SG is struck and arin 28 of thc electric switch Qn' moved to the left. This has the effect ri'energizing the electro-magnet E,ivhich thereupon draws im; y

wartllv its core 'I ainl mores to the right on the arni '2S h v means nf the. spring 45. the link S which is pivotetl ai St to the pirltx 'l`o prevent the arni '2H from :wing thrown ol alin l0. The a in lt) will thereupon he moved to the position intlitatetl in l"i 3. but. n-Lile loing zo the lint- 2J. whit'h is pivotetl at '22. will he actuan-l niitil the enti of its Slot :lil is reached. when the swim-h :5 will be operated. The operation of the latter switch will' etfeet the energization of the pit'lotl' magnet Si'. A:sulfstantialli4 the saine time or :i Ashort linie thereafter. the inner vint of the slot 31 of the link 3; which is pivotetl at 323 to the arni 1t). i5 ieariietl. the sivitt-li aria will he thrown to its original position to ell'et't the tletlnergization of the elsctroanagnt-t E. The. Aiprinff l which i; fastened to the niagnvt traine at t3 anti to theatni lit at l-i. will now af to more. the pielroti arni 1t.) to its. original po# sition. Y

A bracket Q0 seein-eil to the hetl plate t? carries a htill'er tlevit-e ll which rompi-isles a spring-pressed stein 1'.) aggaiiwt which the arm lt) strikea. `When the eletftro-inagnet Si' is inovetl inwardly the ein 1S of the butler device 1T cai-rieti by the piek-oil nini' strike against Sonie part of the pianti to bring the arin lt) to a gradual stop. .algo secured to the heil plate i5 a bracket (2S on which is niountetl an inverted V-sliapetl slide 4F. hoth sitles ot' 'fliich may he of the saine length. or that aide for the puin-langs may7 he longer than the other as iinlit'ateil at 4T in Figs. l. 2. antl 3. After the piek- 'OH device has been oper-teil antl returned to normal pmition with the punchingr :intl

ran as iinlit'atetl in Fig. antl magnet Si' is ttenergizetl. the punching l) ainl the Scrap 4S will l-e dropped over the inverted V. the punt-hing going to one sitle of the slitte lo. ainl the Scrap to the other sitle. thus iinnietliateli' sejmrating the serai) lroni the panching.

The electric Switch as shown in Figs. l

.aint i. may be varieil as desired andthe liarticalar form here illustrated is inert'lj.' wt forth to lallow soine inean.` for aci-oinplishing the objects of our invention. ln hi-- instan( a cabing 4t) has pirated ivithiii it. tiro levers. .38 anti 3T. at 34 ainl 35. re- Spefrtiveiy. The.arin :2S eiteinla out iront one end of the easing. anti has a pin-aiutslot connection with the linlis 2H aini 3;'.

It.u inner end rai-ries an anti-friction roller 35. which is preferably t'oinposetl of iibtilav tion. -ll'hen the arm 2S. the titiller-'35 ii niort-l to tht: left ort-r the 'irin 3G atitl tltthell rraiil; level* 11T agnint the action of the Spring iii?. vWhen tlii otetkirs. the arni *in is inox-eil mit of engagement with the contart 4] whirl. i tnouniml on the insulation 42. ln order to hohl then-infini the poit ion to whith it haa heeirniova-tl. a pivotetl lever 44 may he ine-l antl :nathio hear against the laterally extending )iin 43 tw far, Aoi -t ttseil.

In the event that while the pick-oil" tlevire is in the pmition intlitfatetl iii Fig. 2l :intl lirerly antler the punth. the spring l2 shoultl liet-tane inoperative. the punrh Ywonltl injure in the easing `it) may he the {zit-loot? tlevit'e. aiiil injury would also be tlone to the punt-hing!Vinat-hiiie itself. ln order to te seii the lialiilit)` of urli an acc-itleut. we have provnlt-tl positive intan`l for antler the punt-h earh tinte it is inowtl tlownnani. This positivi' means etiniprisea .swinging aria .'l pivotetl at Tit) to a lirallwt 49 erin-eil to the punching: inat'hine traine. The outwartl inovvnient ol` thi Y r rin is liniiteil h v the pin SH ou the hraeket 49 tFig. lainl it ia lieltl again t auch pin n v means of the spring Tl. ll'hen the at'ni 1G is inovetl inu'artllj: to its position intlir-atetl iii Fig. 3. it Strikes the lower entl 55 ofthe lere;- 51 ain'l inows the vain nortion 5i? thereof against the roller Il. whit-li is inountetl on a lirat'ltet ii-t secured to the punching in: ehine fraaie. The punt-hing niaeliine aint ivitlnlraiving aitzit'hnient are so atljttsteil that the pick-oil elta-tro-iiiagiiet will rent-h its inneriia-.st positioai :it about the .saine tinte that the winch amuines its norinal position. Non', if the yniiith should he again ope 'atetl :intl the alin lt) Should reinaiii in its inner position for any reason whatever. thel anti-lri-tion roller :33 Woiiltl Strilte 'a ,zaiii ;t the vain 32 :intl positivelj.v move th :ii'ni 5l outwardly anti consequently also its' loiver entl 55 with the arin lt). thus ejerting the elettro-magnet S from unil-r the punch anfl iii-eremita;r any injury tu .aaitl magnet or to the punching inaeliine.

In Fig. St :it .'it` fit. are shown V inall Gutters for entirelv severing the scrap from the inaterial inserte-tl. so tl at a piece of wrap 4H :intl the plint-hing D will hotli he .vithtlraivn together to the position shown in Fig. 2. The entier4 .'it' may he of any type tle iretl ami 'arietl at will. so loir; as it eiiit-ientljf vut` the sri-ap from the inaterial ai the saine tina: the inuit-lain. is inaflt. 'in this in tanmwe hare shown a vatting hlatle on a variit-r 5i' whit'h is fastened at tlf to a wup .'ii. Thi.` tutter ha a (loivnuartlly extt'nfling rml (HL aroinnl which is pluvial a spring; 13T for returning the t'iitter to it normal position a itnlit'atetl in Fig. It?. 'livn the initn'h moines (lon-n it Arikes against the top of th'.l cuttertarriei' 3T. :intl inove the mitte tlou'nwartll'i: .m :u to -tl't-t-t the cutting of the .wrap from tlnmaterial imei-teil at the point titl. To permit par( ot' the inattrial rut to he lient. revut' i fornntl in the plate tt). anti a .suitable gnitlt- .tl seein-vil to the t'iip 5S) insures Ute proper vatting. The gnitlv 91 inoveal in thtl guide-way tti. :intl is limited in its upward movement by the plate 61 which is secured in any suitable manner to the; hlocli Gli. If desired, :i buffer device 70 coniposed of rubner or other similar resilient material nity be. used to prevent weer ujury to parts of the cutter when the 5.11111. i. operated.

- In the modification illustrated in Fig :in anti-friction roller C is mountednearthe periphery of the :1111111lus ft2 which is keyed ,L to the sha'tt l. This roller C is arranged toY i strike against. the lever L which is pii'oted :it 2 to the. traine of the punching machine. A spring 755 aets on the arm 7l of the lei-er L to more the hitter against the .stop 7' To the extreme lower end of the arm '7l is piioted at 75. a latch arm S3 whit-ii is pri:- videil with a hooi; at its outer end, und n cani 71' at an intermediate portion. Th" van: is adapted tc, ride up on the roller 715 which is mounted on the frame. of the punching inzit-bine. 'The vertical portion 79 o1 the f' hooi: -sl is arranged to engage the upward projection .S of the pick-ott arin 1U and 'fiore the lutter to its inner position when the :haii makes n complete revolution. ln this event, after the arm l0' has been actu` ated and given sutlieient momentum to carry it to its innermost position, the en. 7 '1' will rido up on the roller 76 to free die hook 84 g from the projection or lug 80. The spring l 12 may then act as before to return the arm 10 to itsoriginnl position. Force exeitt on the :1i-n1 10 onlgy7 during about one quarter o* the revolution of the shaft l' l when the roller C' starts from a position corresponding to that shown in lt is obvious. however. that tho roller C' will be moved only a pre-determined distance when the hook 14 will he released by reason of the 1:11111 7T ridincr 11p on the roller 76; and when 5 tile roller again moves away from the lever L the spring 73 acts on the arm 74 to i return the lateh-arin 83 to its original position. la the event that the :zrin l0' reaches its original position before thel latch-arm S3 reaches its normal position. the face 7S of the hook -f will slide over the projection HU g and the latch-arm S3 will full into the position-inxlii-ated in Fig. 8.

The operation of our invention may he oxplained :1.` follows. pnnehing machine has' heen operated ii; the

Assuming that the usual timmer und the eain C therefore rei 'foin-il. the arm or link 29 will he moved to the lett a pre-deteriiiined distante initiljhe enit 3f the slot 30 strikes against-the piu Sn l rated' in Fig. 5.' This will effect the engugej nient ot' the oontziets -ll and Si?. rnd hy: refeieiimto Fig. 7 the circuit. manl- :Easily he. trai-ed troni the. ninintp the arin, eontmts 58.31111 4l, wire 95 'eler-tro-iinigfnet E, wire 9, to the inain. 'i'he elecit'iinaguet l E will thereupon be energized and its tore l in their 7 and eonnecting par s thrown inwardly to more the urli-ott' dern-e S7 to tho position indicated 11i Fig. 3. A short time after or upon reaching this position. the inner end of the slot il of the link 32 strikes against the pin SG to return the :xrm 2n to its nornial position. and therefore el'eet the dis- 5 engagement of the eontarts il and S and thix consequent denei-rizaiion of the electro-niagnet E. x\`ul1.stnutuill v :it the saine time tht` inner end of the .slot .23 of the arm .s'i'fitelmu'in :H- and operates the latter t0 1 rinse the switch Q5 and thus eonnert the coni facts SH3 and 5.*7 :is indicated 1n FEL'. 7. A

eiri'tiit will now he elosefl from the main tliroyh iirui 2l. contacts 9H, 97. wire 9S,

elt-otro-nnignet l5. and wir@ HS to tho i 11111111. 'l'he piek-oli'electro-magnet will therefore energized to attract :ind hold the and scrap which are, of magnetic material. The electro-magnet lil having heen deiifryized as stated, the spring 12 will :iet to return the aria li) in its original position, and in flo-ing so. the arnis S31 and 12 will have trio movement n v reason of the slots 23 und 3l respeetively. in the outer ends thereof. "he arm 28 will be left in its position lust placed so that the contacts 41 and reznziin disengaged. But upon the arm l() rear-ning its normal position, the,

inner end of the, slot 23 in the link "21 strikes ngainst the pin carried by the arm 24 to i operate the itch and open the contacts 9G- 97. At this time the punching I) :1nd

i scrap 4S :1re .Film1-1.; 'the V 46, and when the pick-oit elec-Ircia-Jjnet is thus denergizod, the punt-hin;r will tall. to one side and slid-c clown the Muy l? and the scrap -lS will fall 'to the other side.

lt should he noted that although the buffer device 17 when its stein t8 strikes eleetro-imignet :1nd arm. the spring-[mowed lever 51 will tend to have the saine etiect and will also assist in overcoming the ins ei'tia of the irioving part"l and stzirt the same return movement. lf desired. furthermore. the 0:1111 nifty also lie so do- ;signed with respeet to the punching nitij rhino and thi` withdrawing attachment. that ea-l1 time the punih is operated the arm 10 will he given a positivtl thrust to assistin returningr it -to its normal position. By hanging the leverages and the connections. any degree of rapidity of operation to nzoiithearm Q9 into the position indii f oi" withdrawing the punt-lungs may be obtained. ln other words. the punching m11- chine may he operated :is rapidly :is desired, and the withdrawing.attachment adjusted g to correspond in rapidity therewith.

The operation of the nieohaniesll device .shown in Fig. 8 is substantiall;v similar to the operation of the construction` town in Fig. 1. ln both cases the cutters ott, 5G, illustrated in detail in Figs. 1() and 11, should be usr-tl. or some other cutter which will have the saine effect. The positive cjecting device should be used in an)7 case for the salie of safet) so that in no event can the punch injure any of the parts b v reason of the piclc-oti electro-magnet getting caught between the punch aud the die.

It will now he apparent that we have constructed a simple and etlicient device for ithdrawing punchings from punching niachiner; such as is absolutely safe, in Ithat it does not require the inertion of the-workman`s hands under the punch to take out the punchings and scrap. rlhis has often been the source of serious injuries for the reason that the punch might come down while it was being endeavored to remove the punchings and scrap. It should also be noted that a positive ejecting device has been provided to n'event the punching machine or the attacinucnt thereto from being injured. But we do not desire to be limited to the exact construction of detail and arrangement of parts herein disclosed. as various` moditications may be made by those skilled in the art without departing` from the spirit and scope of our invention.

What we desire to claim and have protected by Letters Patent in the United States is:-

1. In a pick-otix for punching machines, the combination with a punching machine, and means for autoi'natically withdrawing by attraction the material from the said machine after it is punched.

ii. In a pick-ott` for punching machines, the combination with punching apparatus,

and electrosmcclninical means for automatically withdrawing the punchings ron'i such apparatus.

3. in combination with a punching machine. ot' a pick-ott' device for automatically witlnlrawing punchings from the die, and

means cti-acting with the punching machine for operatinpf said pick-ott' device.

-i-. in combinatitm with a punching machine. ot' a pick-ott' device for automatically witlulrawing pnnchings .from the punching machine. electric mainsifor actuating said pick-ott' device. switch mechanism for couirolling said electric means. and connections actuated b v the pant-hing machine for operating said switch mechanism.

5. ln -ombination with a punchingmachine. of a swinging arm. an electroanagnct carried b v said arm for picking punchings otil from the die of the punching machine. and means for automatically actuating said arm.

t3. ln combination with a punching machine. of a swinging ar'o, :in electro-magnet carried thereby. means co-acting with the punching machine to automatically move said arm to bring said electro-umgeht in oroxiniity to the unchings, and means for energizing and tenergizing said electroinagnets at pre-determined times.

7. In punching machines, the combination with a pick-off device comprising a swinging arm, and means operated upon movement. of the punch for positively actuating said arm out of the path of the. punch.

8. In punching machines, an attachment for automatically withdrawing by attraction punchings from the die, and positive means for preventing an)- part of said attachment from being engaged by the punch.

9. In punching machines, the combination with a'arm, of an electro-magnet car rietl thereby. means for moving said arm t0 bring the electro-magnet into proximity to the punchings, and a device operated upon the movement. of the punch to punching position to positively actuate said arm to take the electro-magnet out of the pat-h of the punch.

l0. In punching machines, the. combination with a punching machine, of a swin fing arm, an electro-magnetl carried by said arm, an actuating device for moving said arm to bring the electro-magnet into prox imity to the punchings on the die, means for eiie;giziiig said electro-magnet, means for retirning the arm and eicctro-magnet to normal position, and a safety device for preventing the electro-magnet from being struck by the punch.

11. In combination with a punching niachine, of a swinging arm, an electro-magnet larried thereby. means co-acting with the punching machine for automatically swinging said arm upon the operation of the punch. an automatic switch for energizing said electroniagnet when in proximity to the punchings, means, for returningsaid swinging arm to its normal position, and connections between said swinging,r arm and switch for automatically denergizing said electro-magnet when the same assumes its normal position.

12. The combination with a punching machine. of a swinging arm, an electro-magnet carried by said arm. an additioirl electromagnet connected to said arm to actuate the same and swing said first-named electromagnet into proximity to the punchiiigs, an electric switch, means co-actmg with the punching machine for operating said electric switch `to eti'ect the energizatioa of the second-named electro-magnet. an additional switch. a connection between said arm and said additional switch to operate the latter and effect the energization of the firstnamed electro-magnet. and means for returning said swinging arm to its normal position. and automatically denergizvi'iig said tirst-named electromagnet. f

1S. In punching machines, ldie combina- Ult tao

tion with a swinging arm, of an electro-magnet carried at the outer end thereof, an electro-magnetic device connected to saidarm at an intermediate point, automatic electrical means (zo-acting with said punching machine to effect the operaiion of said electromagnetic device upon the actuation'of the punch, an electrical switch, and a connection hetween said electrical switch and the swinging arm for etfecting the energization of the electromagnet at thc outer end of the arm when said electro-magnet is inproximity to the punchings, and for effecting the 'dencrgization of said electro-magnet when said arm assumes its normal position.

14. ln a punching machine, the combination with the dies, of a device for withdrawing by attraction punchings from the path of the dies, means for operating the said device, and means for effect-ing a separation of the punching and the scrap.

l5. In a punching machine, the combination with an electro-magnetic pick-off device for withdrawing the punchings from the punching machine, of electro-magnetic means co-acting with the punching machine for automatically operating said pick-ott` device, and means adjacent to said )ick-ofi.' device when in normal position for e ecting the scparation ot the punching andthe scrap.

16. In a punching machine, the combination w Lt picieot device for automatically chines, ot' apparatus co acting with the punching machine for operating said pick-oli' device, and a device for automatically separating the punching from the scrap, by operating upon the punching and scrap to allow them to fall apart from each other.

17. In a punching machine, the combination with a punch and a die, of means for separating the scrap and the punching entirely from thc material inserted, and means for withdrawing by attraction both the scrap and the punching from 'the machine.

1S. ln a punching machine, the combination with a punch and a die, of a plurality of cutters for separating the scrap as .vell as the punching entirely from the material insented, and automatic electro -ntcchanical means for withdrawing both the scrap and punching from the machine.

19. In a punching machine. the combination of a punch and a die, and diametricallj,v arranged cutters or knives :for severing the punching from the scrap.

scrap from the material when the punching L made.

2l). ln a'punching machine, the combina tion with a punch and a die, of diametrical. arranged cutters or ltniws for severing tlf' scrap from the material inserted when a punching is made, an automatic elcctroane chanical device for withdrawing the punching and scrap from the punching machine, and means for automaticaiiy separating the 2l. The combination in a punching machine with a punch and a circular die having a central opening, of cutters or knives arranged opposite each other for entirely severing the scrap from the material inserted when a punching is made, an electro-magnetic pick-off device for withdrawing the punchings and scrap from the punching machine, and means co-act-ing with the punching machine for automatically operating said pick-oil device.

22. The combination with a punchinv machine of means for withdrawing puncnings therefrom, and buffer mechanism for the movable member of said means.

23. in a punching machine, the combinaion with 'means for withdrawing punchings from punching machines comprising a movable member, of a buffer device carried by said member and arranged to strike against.

l a part of the punching machine, and an adwithdrawmg punclnngs from punching ma ditional butler device arranged to be struck by said member upon returning to its normal position.

'24. In a punching machine, the combination with a swinging arm. of an eleetromag net carried thereby, a butler device also'carried by said arm, and arranged to strike against the punch, an additional bilder dcvice arranged to be struck by the arm upon returning to its normal position, electromagnetic means coacinff with the punching machine for autoznatical y swinging said arm and electro-magnet toward the punch and means for returning said electro-magnet to normal position.

In testimony whereof", we have signed our names to this specilicaiion in the presence of two .subscribing witne-scs.

CAMPBELL SCOTT. vERNEST L. (-LALE, Sn. llitncsses:

Jois Fisn, Jr., Bonsa B. Ha vtm-CN.

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