US1828596A - Feeding mechanism - Google Patents

Description

Oct. 20, 1931. R. c. DANLY 1,828,596

FEEDING MECHANISM Original Filed Feb. 1, 1950 5 Srieets-Sheet 1 67 INVENTOR:

4o H m-Hr C, 0/4 4 y,

ATTORNEY.

0d. 20, 1931. R. c. DAN; 1,828,596

I FEEDING MECHAN'IJSM Original Filed Feb. 1, 1930 3 Sheets-Sheet 2 INVENTOR.

85A 7 C UA/VL 3 A TTORNE Y.

Oct. 20, 1931. R. c. DANLY 1,828,596

FEEDING MECHANISM Original Filed Feb. 1, 1930 3 Sheets-Sheet 5 INVENTOR.

l 1 7 305597 C QA/VLY BY 22 MW' 2 l ATTORNEY.

' tion-ready to be 'depositedinsaid grinding the mechanism, with" parts .ingposition to Patented 1 931 on CHICAGO;'ILIiINQiQ'ASSIGNFQRQTQ 311161;? me meiseecmmms,

ROBE T" 0. DANLY,

mo; or'oHIoAG'o, nLmoisn oonrfonnmxon on lnL no s This invention relates to cefta'in'imp'rovements in the typeof automatic feeding-ap pliances 'by' means of which an nn'fin'ished Va1v'et'a'ppet,"o'r like-pieced work, is fed. into the grinding throat ofia centerless' grinding mechanism, an example of which is shown in the George I. Danly-PateneNo. 1,725, 44 dated August 22,1929 And the present iin provement'ha's a-s'its'object To p'rovlde a simple,durable and efficient structure-1 formationand combination of parts and mechanisms by means of which pieces ofnnfin ishedwork are serially manipnlated anetcai'riedfrom a holding track and deposited in proper no's'itionjinthe grinding throat. or zo'ne'of a centerl''ss grinding meoha nismgjwith the di-fierent n1anipu1ating and carr ing-movements of theppesen't appliance constitutinga single cycle of the movements" which are set in motion bya starting eonnec-rtion between the Work ejecting means of an as'soc'i ated centerless: gfindin'g mechanism and theoperating mechanism of the present feeding applitvnce; with such cyc'leof movements beginnlng with the deposit of apiece of unfinishecl work in-the 'grinding'throat of said grinding meehanism end ending with a trans= fen 'of-asue'ceechng plece ofwork into a posh throat, all-as wili hereinafter more fnlly appear. 7 k y o In the accompanying "drawings z Fig. 1 is; a side elevation illustratingthe generalwarnangement of iparts :in' a' preferred: form of the inventlongfn y i 2 is horizontal section on 11116 21-2.

Fig.:3 -oft1fe mechanisni for effecting the i115 termittent "cyc'leof movernent's of the machine;

1 Fiz'gm3 is a detail verticalsectionof same v cteposit aa pieceof nnfinishedwwork' in the:

grinding throat of: a centeniesswgrinding mechanism; .v 5is a detallsl de elevation of th'e samei 6" is an enlarged detall planmw of V Fla; I V the mechanism with the-parts ln' positl'onfor engagement withla sueceeding ie eof workzj Fig: -7 is 1 an enlarged side elevation of same i With m. 425MB} fit entered" sttembe'r *3; 125151.

parts broken away in section on tion, showing the wofkgr'aspingitws ofthe' carrier IH'P'O'SIUO'H to deposit a pi'efcei of 'vg o'rk to be finished in the -grindii1g throat of a centerless grinding mechanism;

1 Fig.9 is a detail sectional planviewon line 9 9. Fig. 8"of the same inthe eisen'g'egedcondition of thegrasping' jaws and their 61 operating means. V g

FigJlO is a companion view-showingsai dpartsin the engaged or "graspingc'endition Q jaws.

Like reference'nnmerals indicate like-pints" 6 1n the SGVQTBUIXUGWSV v 1 i As 1n the before inenione'ct Patent No. I

1,725,444,13his automatic work feeding meet-- (ZHi'SHIOI attachment for centeifl'ess grinding 111ec'ha n sms, comprises a su portmgfi'arfie 713 ing mechanism of asso'ciated"entefless d grinding mechanism. The stoppage of said operat ng. mechanism settamedby self con:

tained n'reanson thecomple'tion of one cycle of movements of th'erautomatic feeding means andmechanisms'a'bove referred to, and in 5 condltlon for a snoc'eeding ste'rtmg operation I by the controlling connection wlth'said Work The-base 1 ofthe sh'ellitype shown is ade; t: ed to contain a ni'otoi' (not shown)" for I in;- p'artl'ng t"otation to automatic "operating, mechanism aforesaid, and carries a fi Xed hon ,i'zontaljframe or bracketeXtenSionJQ'foi-the; V

support of the hereinafter described" parts and'rnechenismsof thi'si'rnp rovef nefit. And 3 i'na'chacentrelation to said bracket extension ear3,constitutinga part of acdiipliiig Iiieansi I I w herebythe pfe'sent feeding attachment" y fixedly attached to the frame ofa center- 1m ejecting means of the grinding lhechinis n. V

less grinding mechanism, in proper relation to the grinding throat or zone thereof.

On the upper part of the base 1, a holding hopper l for a supply of unfinished tappets or the like to be operated on, is fixedly supported, andsuch hopper is provided with an oscillatory selector plate or member 5 adapted to lift unfinished pieces of work from the hopper and place the same in serial order on an inclined track 6,- down which they will slide by gravity and be singly engaged and fed by the automatic feeding mechanisms hereinafter described in detail. The construction and arrangement of the selector plate or'member 5 is adapted to operate in a manner similar to the selector plate described in the aforesaid Danly Patent No. 1,725,444, and issuch that in case headed tappets orthe like are to be selected, the same will be selected and placed on the track 6 with their headed portions in rearward positions thereon.

Adjacent to the mid-length of the track 6 a revoluble disk 7 is arranged, and provided with a series of radial blades 7 on its perimeter, the blades being adapted to engage the pieces of work moving down the inclined track 6 and retard an undue rapidity of descent of the pieces of work and insure a further descent of each piece in a single and successive order. Rotation .of the disk 7 is attained by operative connection thereof with a suitable power source, preferably the means set forth in my application for Patent SerialNo.j425,172, filed February 1, 1930.

In adjacent and offset relation to the lower end of the track 6, a receiving downspout or boot 8 is fixedly supported on the base 1, and

atransfer means is located between the lower end of the track 6 and the upper and receiving end of the downspout 8, with said transfer means involving a construction and arrangement as follows:

A fixed guide frame 9 is arranged between the lower end of the track 6 and the upper end of the downspout 8, to provide a guidewayfor a transversely reciprocating slide or carrier 10, formed with a receiving notch or recess 10 for the reception of and engage- I ment with the shank portion of a piece of work lowermost on the track 6.- Vith the movement of the slide or carrier 10in one direction the piece of work in the notch 10 will be carried from the lower end of the track 6 to a point over the downspout 8 intowhich it is discharged by a knock out blade 11 pivoted at 11 011 the uide frame 9 and provided with'a projecting ug 12 with which an adjustable stem or tappet 13 on the slide 10 has operative contact as said slide or carrier nears the end of its stroke towardsthe downspout, to effect a movement of the blade 11 and discharge the piece of work from the notch 10 into the downspout 8. V

resets;

Mounted on the frame extension 2 of the main base 1 and in receiving relation with the downspout 8, is an endless carrier 17 the end carrying sheaves 17 of which are journalled on said frame extension 2.

The upper stretch of the endless carrier 17 has preferably a downward inclination as shown, with a;view to an easy transfer of pieces of work to the next unit of the present feeding mechanism. While the travel of the endless carrier 17 is preferably attained by a shaft connection '18 of the universaltype forming the operative connection between a carrying sheave 17' of said carrier and a convenien power shaft.

In adjacent relation to the delivery end of the endless carrier 17, a horizontal trough shaped receiving platform 19 is movably mounted on the aforesaid frame extension 2 by a plurality of radius links 20, so as to be capable of limited vertical movement in actual use. The platform 19 is adapted to receive from the aforesaid endless carrier 17, a piece of unfinished work, such as the headed tappet shown, which is properly positioned in the platform by stop abutment of the head of the tappet against the end of the same, as illustrated in Figs. 6 and 7.

In the construction shown, the piece of unfinished work in the Vale of the platform 19 is carried and deposited between the grinding wheel 21 and feeding wheel 21 of an associated centerless grinding mechanism by means as follows:

A carrier 22, of the. elongated bar type shown,is arranged in operative relation to the receiving platform 19 aforesaid, and receives longitudinal reciprocation'towards and from the-grinding throat of the grinding mechanism above referred to, by operative connection to one end of a rock arm 23, forming a part of an automatic. driving and control mechanism hereinafter described, and at its other end the carrier 22 is carried a pair of work grasping jaws 22, 22 preferably of the detail construction hereinafter described.

The under face of said carrier or bar 22, has sliding support intermediate its length on a bearing roller 24 journalled on the extension or bracket 2 of the main base 1. And with a view to a limited rising and falling movement of the jaw carrying end of the carrier or bar-22, in the actual operation of the mecha effecting the loperations ofsthe different mechanisms ofthepresent construction in proper and successive order, is similar to that descr bed and claimed in another apphcatlon for. patent SGIlCtl' No. 425,172, filed February 1,1930, and comprises a construction and arran ement of parts as follows:

An endless screw haft 36 is journalled longitudinally in the main base land receives constant rotation through a pulley and belt connection to the power shaft of a motor which may be located within the main base 1; The endless screw or worm part of the shaft 36 has operative engagement with a worm wheel 37 on a transversely arranged shaft 38 that has suitable operative connec tion ith the heretofore described bladed disk 7 associated with the inclined track 6 of the structure;

,In addition said primary shaft 38 has gearing connection 39'withthe carrying hub 40 of the driving element of a clutch 41, with said hub loosely mounted on a secondary shaft 42. The carryinghub 43 of-the driven element of theclutch 41 is mounted in a slidable manner on the secondary shaft 42 aforesaid, and in rotatable ei'igagement therewith. The purpose being to attain revolution of the secondary shaft 42 from the primary shaft 88, only during the clutch engagement between the hubs 40 and 43. i In the construction shown, the above referred to intermittent engagement of the hubs 4O and43, is automatically effected and maintained while a single and complete revolution of the secondary shaft 42 i's'effected, by means as follows: 1

The carrying hub 48 of the driven element of the clutch 41 is provided with a cam pr0- jection 4 preferably arranged ina peripheral channel in the hub as shown, with such cam projection adapted for operative engagement with an end portion of'a looking or abutment bar 45, preferably of the sliding type shown, and so that with an engagement of said cam projection against the end of said bar 45, the carrying hub of the driven clutch element, and of which hub the cam projection is'a fixed part, will be positively moved and held out of clutch engagement until a release of the above described engagement between the cam projection 44 and the abutment bar 45, by'a movement of said bar 45 out of such engagement by automatic means hereinafter described.

lVith an attainment of such disengagement, an associated spring 46 operates to above described, is attained by operative connections of said bar 45 with a reciprocating part of the automatic work ejecting unit of a .centerless grinding mechanism, with such connection preferably comprising a pulling link 47 attached at one end to a convenient part. of said work ejector unit, and at the other end to a rock arm48 on a transverse shaft 49 that is journalled on the main base -1-',- with said shaft 49 carrying a secondary rock ar1n 5O. and link connection 51 with locking or abutment bar 45 aforesaid.

The aforesaid. primary shaft 88 carries in an end outside the main base 1, a wiper arm adapted to engage and operate the oscillatory selector plate 5 of the work holding hopper 4.

The secondary shaft 42 aforesaid carries a crank disk 53 the crank pin of which is connected by a link 54 with a crank arm 55 on a transverse rock shaft 56 journalled in the wall of the main base 1. The end of said rock shaft 56 exterior of the base 1 carries the heretofore described rock arm 23, as the means for imparting reciprocation to the work carrier 22, and the construction is such that the rock arm 23 receives a full forward and a full return stroke in each intermittent action of the control mechanism just described. The operation of the mechanism as a whole, is described in connection with the description of each unit of the present feeding mechanism, and in view .of which a description of the serial operation of the parts is not deemed necessary.

Having thus fully described my invention, whatl claim as new, is

1. In a feeding mechanism of the type described, the combination of a supporting base, a horizontal work holding platform mounted on said base, a single delivery supply means mounted on said base in operative relation to said platform, a reciprocating car- .rienassociated with said mechanisms, and

provided with work grasping jaws of the yieldinglyheld closed type, means for imparting a rising. initial movement and a final falling movement to the jaw carrying end of said carrier in its delivery stroke, and corresponding-reverse movements on its return stroke, and means for closing the grasping jaws in the return condition of the carrier and for opening said jaws in the delivery condition of the carrier.

2. In a feeding mechanism of the type described, the combination of a supporting base,

a workholding platform mounted on said base, a single delivery supply means mounted intense on said baseinoperative relationto Sat mp1 form, a reeiproeatingfcarrier associated with' said mechanisms, and provided WithfiWork grasping jaws of the yielc'lingl'y held closed type,--means forimparting "a rising initial movement and a final Tfa-lling movement to the JELW marrying end ofpsai'd car'rier in its delivery stw'oke', and oorrespo nding reverse movement on its return stroke,- and means i or 'closingjth'e grasping: jaws in the return condition of' tl'ie- -carrier and for opening said j sws in the delivery 'conditionof carrier, the salne comprisijng a release bar moving in unisonwith; said carrier With its initial movement and a final falling move-.

nentto the j earryinggen'd 'oii said carrier in its delivery-stroke; and; corresponding reverse movementon its returnstroke, and means for 'closingithe*graspmg aws in the V returneondltlon-ofthe carrieriand for open; 7

ingvsaid jaws 1 in the delivery condition of theoarrrer, thesame compr sing a release'ba'r movlng i111 unison 'W1th said ,oarrier wlth 1138" forward :end: extending between the grasping jaws, cameformati'on onris'aid "forward end o'f-the'releas'e bar, afmemb'er having movement 1n a -.transverse passage 1n 1 the barrier and operative engagement atone sidetvith said cam formation. and. at the a other side With one of thegraspmg aws, and means fOIllOldlIig said'releasezbar--stationary.asthecarrier com- 1 pletes the end of its forward s' troke'and the endofitsereturnstroke; r

v 4; In azsfeeding mechanism of the typedd seribedp, he-.combination of a supporting base, a 'Work holding platformmounted on" said base a'single delivery supply: means mounted on'isaid' base "in operative. ;relation to said platform, a :reeiprocating carrier associated with: said mechanisms, and provided withwork grasping, j aWs 0t the :yieldingly held closed type, means for impartlnga rising'lnltialmovd ment: and final falling- )novement to the jaw Carrying, end of said carrier in its delivery stroke, and :eorresponding reverse movement on: itsreturn stroke,andiineans for; c'losingith'e g-raspingaws in thereturne'ondit ion. of the V g V grasping jaws of the yieldingly"heldclosed ear; 1' "tor openingsa-idjaws in the de- I .eoinprising a }lrelease bar 1- moving in I unison withsa I Wi e ee v n t r s iverye lon- 'ofth=esa-id carrierytheesamev V V [movement andafinalfalllng movement'to I formation on saidiortvardf end of'the release bar,- a member having movement, In a trans-- verse passage in 'th'e carrler and operatl've engageinent atonefside Withsaideam forma-- tion and at the other side with one f of the grasping jaws, anda pair-of stop members secured tin 1-spaced relation on the *s-iipport iirgfbase and aeti'ng to holdsai'd'"releasebar stationary as the :carrier completes the end of itsiorwarclstroke and the end of its return strolie.- f 1 "5. In afeeding mechanism jof'the 'ty peder scribed, the combination of a supporting base,

awork holdingplatform mounted on" said base, a singledeliverysupply means mounted on said base in operative relation to said platform's reciprocating-earner associated with sai-dineohani-sms, andprovidle'd With- Wo'rk grasping j awe of the yieldingly held closed type, means for imparting" a "rising-initial movement and a final falling movement to the jaw carrying end of saiclcarrier'j1n lts delivery stroke, and corresponding reverse movement on its returnstr'oli'e,andmeans for v I,

- closing the grasping j a'ws in the return condit'ion" of the'earrier, means for opening's aid jaws in the delivery'conditi'on' ofsthefcarrier,

an automatic: control mechanism geared to make a: singlereveletion and havingst-a'rtin Y connection with the'workejeoting mechanism of, a oe'nterle'ss grinding; mechanism; and a vibratory arm receiving a forward-land a" backward stroke from said control mech'a-j hisnrand having operativeconneetion with the Carrier-aforesaid '1. Y 6. Ini'a feeding mechanism ofithetype described, the combination of; a supportlng base, a: )VOl'k holding platform mounted on; 'said'fbase, a single delivery supply-means carriedon said base, an endlesscarrier ar ranged intermediate of said-platform and supply means, a reciproeating carr er assoc ated with saidplatform and "providedwith l grasping jaws ofth'eyieldingly held'closed 1 r type, means for-imparting rising initial movement; and E a final falling jmove'm'ent' to the" jaw carrying end of'said. oarrier' vin its delivery stroke and Corresponding reverse 1 movement on a return stroke,'andnieans for '3 p 5:

closing the grasping aWs'i-n the return eon-i dition'of the carrier and'for opening sald jaws in the delivery condition ofithe' earner; 7. In a feeding'me'chanism of thetype de scribed, the combinationjof a supporting base, a work holding platform mounted on I said base, a single delivery supply in'eans Carriedonsaid'base, anendless carrier ar rangedginte'rmedlate of said 'p latform and fated with said platform and provided With supply means, a-reciprocating carrier assoc? V type, means, .foryimparting a rising" initial thejaWYearryi'ng end .--of saidearrier in its movement on areturn stroke, and means for closing the grasping jaws in thereturn condition of. the carrier and for opening said jaws in the delivery condition of the carrier, the same comprising a release bar moving inunison with the carrier with its forward end extending between the grasping jaws and provided with a cam formation adapted for opening engagement with said jaws.

8. In a feedingvmechanism of the type described, the combination of a supporting base, a work holding platform mounted on said base, a single delivery supply means carried on said base, an endless carrier arranged intermediateiof said platform vand supply means, afreciprocating carrier associated with said platform andvprovided with grasping jawsof the yieldingly held closed type, means for imparting a rising initial movement and a final falling movement to the jaw carrying end of said carrier in its delivery stroke and corresponding reverse movement on a return stroke, and means for closing the grasping jaws in the return condition of the carrier and for opening said jaws in the delivery condition of the carrier,

the same comprising a release bar moving in unison with the carrier with its forward end extendingbetween the grasping jaws, a cam formationon said forward end of the release bar, a member having movement in a transverse; passage in the carrier and operative engagement at oneside with said cam formation and at the other side with one of the grasping jaws, and means for holding said release bar stationary as the carrier completes the end of its forward stroke and the end of its return stroke. v

9. In a feeding mechanism of the type de scribed, the combination of a supporting base, a work holding platform mounted on said base, a single delivery supply means carried on sa1d base, an endless carrier arranged intermediate of said platform and supply means, a reciprocating carrier associated with said platform and provided with graspingjaws ofthe yieldingly held closed type,

meansfor imparting a rising initial movement and a final falling movement to the jaw carryingend of said. carrier in its delivery stroke and corresponding reverse movement on a return stroke, and means for closing the grasping aws in the return condition of the carrier and for opening said jaws in the delivery condition of the carrier, the same comprising a release bar moving in unison with the carrier with its forward end extending between the grasping aws, a cam formation member having movement in a transverse passage 1n the carrier and operative engagementat one side with said cam formation and at thesother side with one of the grasping on said forward end of the release bar, a

acting to hold said release bar stationary as the carrier completes the end of its forward stroke and the end of its return stroke.

10. In a feeding mechanism of the type de scribed, the combination of a supporting base,a workholding platform mounted on said base, a single delivery supply means carriedon saidbase, an endless carrier arranged intermediate of said platform and supply means, a reciprocating carrier associated with said platform and provided with grasping aws of the yieldingly held closed type, means for imparting a rising initial movement and a finai falling movement to the aw carrying end of said carrier in its delivery stroke and corresponding reverse movements ona return stroke, means for closing the graspingaws in the return condition of the carrier and for opening saidjaws in the. delivery condition of the carrier, an automatic control mechanism geared to make a single revolution and having starting connection with the work ejecting mechanism of a centerless grinding mechanism, and a vibratory arm receiving a forward and a backward stroke from said control mechanism and having operative connection with the carrier aforesaid.

11. In a feeding mechanism of the type de-' scribed, the combination of a supporting base, a work holding platform having a rising and falling movement on said base, a single delivery supply means on said base in operative relation to said platform, a reciprocating carrier associated with said platform and provided with work grasping aws of the yieldingly held closed type, means for imparting a rising initial movement and a final falling movement to the jaw carrying end of said carrier in its delivery stroke and corresponding reverse movements on its return stroke, and means for closing the grasping aws in the return condition of the carrier and for opening said jaws in the delivery condition of the carrier.

12. In a feeding mechanism of the type described, the combination of a supporting base, a work holding platform having a rising and falling movement on said base, a single delivery supply means on said base in operative relation to said platform, a reciproeating carrierassooiated with said platform and. provided with work grasping jaws of the yieldingly held closed type, means for imparting a rising initial movement and a final falling'movement tothe jaw carrying end of said carrier in its delivery stroke and corre-' sponding reverse movements on its return stroke, andumeans for closing the grasping jaws in the return condition of the carrier andfor opening said jaws in the delivery condition of the carrier the same compris ing a release bar moving in unison with said carrier with its forward end extending between the grasping jaws and provided with LiSZBiBEG j mam formation adapted forionerative en gagementvvitli saidajawsi I i 7 "13.21111 a vfeedingmechanism of the type described,v theco'mbination of a supporting base; atwork holding platformshavingia rise ing *and falling movement on said b.ase,*a single deliveryv supply means on saidbase in operative" relation to-'-said platform; recip-v rocating carrier associated With :said plat form and L provided with Work grasping i j aWs of the yieldingly held" closed type, means for "impartinga rising initial movement and'a final falling movementto the jaw carrying end of said carrier in its deliverystroke and 7 corresponding reverse movements on its -return- 'stroke','*and'n1 eans for closingthe grasping j aws infthe return condition of the car Her and for opening said avvs 1n the delivery COIldltlOIVOf the carr1er,the same comprising' a release bar moving in unison with the carrier withQits. forward end extending be tWeen'the grasping 121WS, acamformation on said forward end ofthe release bar, a memberjhavin,9;-movement ina'transverse pa ssag'e of the carrierand operative engagement at on'e-sidewith-said cam formation and at the base, a Work holding platform having'a TlS- ing and falling movement on said base," a; single delivery supply means on saidbase in operative relation to saidplatfor eating carrier associated? WitlTS the yildingfly held closed tvpe'f'means for impartinga" rising initial movement and a final falling movement to the jaw Carrying end of said carrie-rin 'ltsdel verv strbl turn stroke, and means fo-r closing the grasp ingjaws in the return condition of the carrier and for opening said jawsin the delivery con: dition of the carrier, the same comprising a release bar moi'ring in unison with said car rier'with its forward end ektendin'g betvveen the grasping javv's afca-m formation on said forward end of the release-ban a: member having movement in a transverse passage in the. carrier and operative engagernent one side.- with said cam formation-and" at the others'id e With one of the jaws, and; a pair of stop members secured inspaced re--.

lation on ithe slipper-ting: base andactingtohold" release stationary. as the car- V trier completes theend-of lts forward stroke and the endo f itsreturn-stroke, l

' 15. In a feeding mechanism of thejtvpe-de scribed, ithefcoinbination of a st p e-mg 3 'base 'a Work holdi g platform having;- arising and falling movement 0nsardbasc,"a

and corresponding reverse movements; on, itsire' final fall v I end o fsaid carrier 1n its delivery stroke and corresponding 1 reverse movements in its re-- dn a'feeding mechanism" of the typeSdehol'd -n'g 1 Wells single delivery-shpplvr'means on'said base'finoperative relation to; c. said arrow, re- 1 ciprocating'. :carrier. associated- With said platform and provided With Work grasping Q jaws of the yieldingly' held closed type-,

meal sffor. imparting a rising initial movement: and a final falling movementto the j aw carrying end of said carrier illitS delivery stroker and corresponding reverse movements on its return.stroke and means forclosing th'egrasping jaws inthefreturncondition of the carrier, means foropening said jaws in the delivery conditionof the carrier, an I tomatic control mechanism geared to make v nection With the workuejectingmechanism,,

a single revolution andhaving startingconor centerless" grinding mechanism," and vibratoryarm receiving a forwardeand a backward stroke from-said control mec'ha nism and ha-ving operative connection with said carrier.

i 16; In a feeding mechanism Ofthetypedescribed; the combination of a Workhold ing platform, radius links connecting said plat- With the supporting base. to" afford a! risin j and iallin inovementto said" latv a i 'formja single delivery supply means on said base in operative relation to said ,platformfa reciprocating; carrier; associated with said? platform and provided with Workgr'asping jaws of theyieldingly held closed type, means for-imparting a risingiinitia l movement and a final falling-n ovenienttolthe awcarryingq I end of-said carrier-in-its delivervstroke and corresponding reverse inovements in its return stroke; and means fo rclosingtlie *rasp-' {i ea ing jaw 1n the return- 'condition'o f thefcar-f condition ofthe'carrier." I v v 1.7 L In a feeding mechanism ofthetype de-- platform; radius links 'connectinglsai plata single delivery si pp means: on saidbase in operative relation to said platform, a reciprocating carrier associated with said platform-and rovided'ivith'worlr ras in "awe the 'yieldingiy'held closed type, means for imparting a rlslngll l ltlal movement hand-a ing movement to the aw carrying turn strokdand means for cl osing the grasp ing jaws in I the ret "r'nj condition 01' the carrier and for openi-ng sa V id i v in a'delivery condition. of the ca easping awe and provided with a cam agenient fern i sion ada dted; for operative en scribe' c' the combination of a iver Platfor- 1,rad-iiis lin is connecting-{said plat 'r-i'er; and 'fo-r' opening sai'd'j'aws in a delivery i v 7 v scribed; the combinatiom of awor k holding c form with the supidortingbase, to afferda;

rising and falling movement'to saidplatform,

nesame-comprising areleasebar moving infanisonwithsaid'c 'riervvi'th its forvva rd'end extending between I the form with the supporting base to afford a rising andfalling movement to said platform, a single dehvery supply means on saidbase 111 V operative relation to said platform, a reciprocating carrier associated with said platrier with its forward end extending between the grasping jaws, a cam formation on said 7 forward end of the release bar, a member having movement in a transverse passage of the carrier and operative engagement at one side with said cam formation and at the other side with one of the grasping jaws,,and means for holding said release bar stationary as the carrier completes the end of its forward stroke and the end of its return stroke.

19; In a feeding mechanism of the type de scribed, the combination of a work holding platform, radius links connecting said plat form with the supportingbase to afford a rising and falling movement to said platform, a single delivery supply means on said base in operative relation to said platform, a reciprocating carrier associated with said platform and provided withwork graspingjaws of the yieldingly held closed type, means for imparting a rising initial movement and a finalfallingmovement to the jaw carrying end of saidcarrier in its deliverystroke and corresponding reverse movements in'its re turn stroke, and means for closing the grasping jaws" in the'return condition of the carrier and for opening said jaws in a delivery condition of the carrier, the same comprising a release bar movingin unison with said carrier with its forward end extending between the grasping jaws, a cam formation on said forward end of the release bar, a member having movement in a transverse passage in the carrier and operative engagement at one side with said cam formation and at the 7 other side with one of the grasping jaws, and

apair of stop members secured in spaced scribed. the combination ofa work holding platform, radius links'co'nnecting said platform with the supportlng base to afford a rising and falling movement to said platform,

a singledelivery supply means on said base in operative relation to said platform, a reciprocating carrier associated with said platform and provided with work grasping jaws of the yieldingly held closed type, means for. imparting a rising initial movement and'a final falling movement to the jaw carrying end of said carrier in its delivery stroke and corresponding reverse movements on its re turn stroke, means for closing the grasping jaws in the returncondition of the carrier, and for opening said jaws in a delivery condition of the carrier, an automatic control mechanism geared to make a single revolution and having starting connection with the work ejecting mechanism of, a 'centerless grindingmechanism, and a vibratory arm receiving a. forward and a backward stroke from said control mechanism and having operative connection with said carrier.

21. In a feeding mechanism, the combina tion of a supporting base, a work containing hopper provided witha selector mechanism and an inclined track adapted to receive pieces of work from said selector mechanism, a receiving downspout arranged in lateral relation to said track,- means for serially transferring pieces of work from the lower end of said track to the downspout, and means for feeding the pieces of workfrom said downspout into the grinding throat of a grinding mechanisma 22. In a feeding mechanism, the combination of a supporting base, a work containing hopper provided with a selector mechanism and an inclined track adapted to receive. pieces of work from said selector mechanism,

a receivingdownspout arranged in lateral relation to said track, means for serially transferring pieces of work from the lower end of.

said track to the downspout, and means for, feeding the pieces of work from said downspout into the grinding throat of a grinding mechanism, the same comprising a work holding platform in receiving relation to said downspout, a reciprocating carrier associated with said platform and provided at one} end with grasping jaws, means for imparting a rising initial movement and a final fallingmovement to the jaw carrying end of said carrier in its delivery strokeand corresponding reverse movements on its return stroke, and means for closing the grasping jaws in the return condition of the carrier and for opening said jaws in the delivery condition of the carrier. 7

23. In a feeding mechanism, the combination ofa supporting base, a workcontaining hopper provided with a selector mechanism and an inclined track adapted to receive pieces of work from said selector mechanism, a receiving downspout arranged in lateral re-' lation to said track, means for serially transferring pieces of work from the lower end of said track to the. downspout, and means for feeding the pieces of work from said downspout into the grindingthroat of a grinding mechanism, the same comprising a work I .withsaid platform and provided with grasp- V ingjaws at one end, means for imparting a the carrier.

holding platform, an endless carrier-arranged intermediate of said platform and downspout, a reclprocating carrier associated withsaid platform and provided at one i 7 end with graspingjaws, means for imparting a rising initial movement and a final falling r-movement to the jaw carrying end of the carrier in its delivery stroke, and corresponding reverse movements on itsreturn stroke, and means for closing the grasping aws in a return condition of the carrler and for opena ing said jaws in the delivery condition of the carrier. p

24. In a feeding me tion of a supporting base, a work containing hopper provided witha selector mechanism and an inclined track adapted to receive pieces of work from said selector mechanism, a receiving downspout arranged in-lateral re lation to said track, means for serially transferring pieces of work from the lower end of said track to the downspout, and means for. feeding the pieces of work from said down-' spout into the grinding throat of a grinding mechanism, the same comprising a work.

holding platform having a rising and falling movement on said base, a reciprocating carrier associated with said platform and provided withrgrasping jaws, means for imparting a rising initial movement and a final falling movement to the jaw carrying end of the carrier in its delivery stroke and corresponding'reverse movements in its return stroke, and means for closing the grasping jaws in the return condition and .for opening said jaws in the delivery condition of the carrier.

25. In a feeding mechanism, the combina- V 1,

tion of a supporting base, a work containing hopper provided with a selector mechanism and an inclined track adapted to receive pieces of work fromsaid selector mechanism, a receiving downspout arranged in lateral relation to said track, means for serially transferring pieces of work from the lower end of said track to the downspout, and means for feeding-the pieces of work from said downspout into the grinding throat of a grinding mechanism, the same comprising a work holding platform, radius links connecting said platform with the supporting base to aflford a rising and falling movement to said platform, a reciprocating carrier associated risinginitial movement and .a final falling movement to the jaw carrying end of said carrier in its delivery stroke and corresponding reverse movements in its return stroke, and means for closing the grasping jaws in the return condition of the carrier and for opening said jaws in adelivery condition of In testimony whe reof I hereunto aflix my signature. 7

' ROBERT C. DANLY.

chanism, the combina

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