US2394376A - Work holder - Google Patents

Description

Feb. 5,- 1946.-

F. S. GRYLEWICZ EI'AL WORKHOLDER Filed May 31, 1945 U il -Lu Z 5 am? L; 5% M..." {a W Patented Feb. 5, 1946 Q worn: noLmnt Frank S. Grylewicz, Cicero, and James C. Harmon I and Delbert V. Witsaman, Chicago, Ill.

v 4 Claims. The current invention'pertains to certainvaluable and innovatory features ofbetterment-and companying drawing, forming a part of this specification, and such apparatus has been fully 'de; scribed hereinafter, it is to be borne in'mind that the invention is not necessarily limited and re stricted to the precise and exact detailsthere'of and that reasonable modifications therein may be availed of without departure from the substance and essence of the invention, asset forth in the appended claims, and without the loss or sacrifice of any of its material benefits and advantages. 7

For simplicity, in this drawing like reference numerals have been employed to designate the same structural parts throughout the several views thereof;

Inthisdrawingj Figure 1 is a plan view of a'clutch pressure-plate mounted on the new work-holder, a portion of the plate, being omitted for greater clarity of illustration; Figure 2 is a fragmentary perspective view of the same elements; i i j T Figure 3 is a perspective view of a portiononly of one of the three clamps of the work-holder;

Figure 4 is an enlarged section on line 4- -lof Figurel; and

The round work-piece or clutch-plate Il, whose plane, top surfaceis tobe smoothed or reconditioned by mechanism not shown, has three, equally-spaced, radially-disposed pairs of downwardly or rearwardly projecting adjacent lugsor ears l2, l2 with registered, roundiaperturesja i3 therethrough by means or whichjwith connecting instrumentalities, not shown," the pressure plate, when forming part of the complete clutch-appliance in the automobile, is moved forwardly and rearwardly into operative and "inoperative positions. j I

The novel and improvedholder or'mountingappliance for such clutch-plate includes, in the present instance, around, fiat ring or base ll of somewhat greater diameter than the plate II and having a fiat, smooth, top surface.

At each of three points 120 degrees apart, the upper surface of such base I4 has an upstanding,

1945', SerialNo 596,960 T Y (01. 51 --217) longitudinally-slotted, radially-disposed plate or bar [5 fastened'edgewise-thereon by a pair of screws l6, I6 extending upwardly through countersunkholes through the base I4, such element 5 i5 extending slightly outwardly beyond the cylindrical edge of'the plate i4,as presented most clearly in Figure 4.

The horizontal rectangular slots ll of all three members are'parallel to and at the same distance above the top fiat face oibase l4. Q

Each of the three radial clamps has an inclined abutment plate i8 fastened fixedly to the edge of the part 14 by. a pair of screws l9, l9, as shown inFigures 3 and 4, such inclination being occasioned by the fact that the plate l8 bears against theprotruding end of the corresponding member l.5, such inclination being outwardly upwards so that the exteriorrface of element'lB is not vertical but-veryslightly inclined outwardly from the vertical? V 7 In addition," each'of the clamps includes a. ,U shape yoke 2f, the inner end portions otwhose parallel side-.arms haveregistered holes 22, 22 of substantially the same diameterasv that of the apertures I3, I13, which is approximately the same lasthewidthoi slot ll; *The intermediate cross-member of each yoke 2| 1 has a; 'central, screw-threaded hole therethronghaccommodating ascrew 23 fitted at-its Touterfendwith a handle 24; by means or which it mayibfe turned and adjusted to bear in slightly downwardl directed manner against, and ,as determined'by the outer sloping face of, the abuti'mentmember i8, the width of the latter approximately equalling; the space between the pair of parallel arms of the yoke 2|, element l8 therefore determining the lateral position of the yoke and approximately thatpf the c1utch-p1ate, the distance between the opposite faces or the two lugs l2, I: being about that of the width of the mem- The round'clutch plate to be repaired or rehabilitated is mounted ojn the three radial "holding or retaining clamps'by inserting a one hea'ded pm r rod 25 at 'eaeh'clamp throughithefive, aligned, more or less equal-size apertures or holes 22; 13, 11,13, 22 wherebythe clutch-plate is supported by'the three pins 25 resting on the bottom, "smooth-surfaces of'the three slots i1, each meme her 'IS being'straddIed by the lugs l2, 12.

Then the three screws 23 are tightened sequentially against the'abutmentplates I8 to'draw'the three pins or rods 25 outwardly and firmly downward slightly ori their corresponding slot bottoms,

'until the clutch-plate-is substantially or actually centered and held down-rigidly and securely=in In some 'cases, a precise and exact centering of the plate is not required, but, in any instance, miscentering in substantial degree is not possible by any one clamp because the other two clamps adjustable screw extended through the screwpreclude such occurrence, when the third clamp is threaded hole of each said yoke and adapted to tightened, due to the angular relations of the hear t its inner end ns the rre p ndin clamps toepne another and the lugs on=the:clutclr- 'abutmentzplate whereby :adiustmentct the sevplate to:c'iie.-ribtlier,.

' n n 5 era! screvifisiclanfiis the-Mb i rpiece fixedly in place A single work-holder of this type will function for reconditioning, the surface of each abutmentproperly with a large number of difierent sizes n'fi-l 'l izilate against which its screw bears being inclutch-plates even though the-lugs of thelatter, -cclined whereby the yoke, when adjusted by its vary somewhat in sizes and spacings apa'ft. l' wrp the P w rdly d war ly Not only is this unique andeorigihal appifance 51o =sa-idtsupp rtins surfaca distinctly eflicient in its holding ahdimaixi'taining 3.3111 11. "idrk-iholder having a base and a plucharacteristics but, as indicated, it has -the r idisigality ot workepiece clamping-means on said base, tinct advantage that it can aieeaiiimoaatefla'rge f the ncvel inifirbveihent of said work-piece clamprange of sizes or pieces of work and thatfiregafd ing=means including in combination a plurality less of their dimen u o{ workpiece supporting-members rigid with :tioh foi Tea 'iijlia and raiiiia lli arrangedabout"a5cdnimon a idinex nbeiswaving-{Supporting-surfaces fma e,'-a 'e=shape gammy-each the agreements section -of the 4 gerewgtmeamfl nom"t e eth ough "5 6f 11%; yoke mai in registered "aperresitfierethroug'hfla pm "for each said 'rr'ie'mb'er V. w r m ae anees for doingtne same "work 'ataiaresent in general use.

commodate were-nieces gif difieriit jdiineiiieii's. the sizes of the parts of the work hiil'der aiid g; "'s1iacd"-a'ra iugs on the work-"piece and "to their openings and tsiia'pj 'sitmarue inodified as bear on Sam suppfdrtin'g surface for fthfe correoc'casion dictates'ahd still bewithinitliejprinciples sponding menili fan "abutmeiiteplate "forie'ach 6f the invention as aeniiea "in the renewing *saidf'yokeiig'iii'iw th amma-s am an faiijustclaims. I eme scrw est iicreethrougl the scre -curettage we'clai'mz j I I so 'newer-eachsaia sekeanua'dapteaiwbear at'it's "1. 'In a work-holder having a'bas'e ands. ipliiiihner ndagamst the corresponding abutmentfality of work-fbice' -c ain'p'i'ngus on saiii fiiliite er by a ziie'nt dtftiie severaliscrews J v iec'e xedlyiniialace'fdrreccn clamping-means meluiiin'glh ceiiiblnaticmavpruiimqjxiinefithes partmg surface or 'leah'df safe rality of work-apiece supporting-members rigid 85 Inieheis being thejdttoiii surf-a de 'iof Ta sloft waasem 'bas'e Jana radially :arrang'eii about a TtlirbtihJsiHfii'efiibiphh thrcug'h which "said commoncente$aikiinefiibersihaving-t l'ifip'dffiiiis .ifiih. i"s adatefdtc-ejii lid. 1 surfaces allfinitlie' i's rii iplaiiah"u shabeiifcke l'iniaiworklf tierhairingiabasefaifiiaiiilu- Tfo'r feachlsaid meifibeii, lth'e'i-i'riterinediate rsec'tfdn rality is: workiiieee clah'ijiingiii'eans f on sai'd o'fthe yoke having ascrewmreaueaina e"wer .Ibiisgith' 'direll iii-iiiircveinlnt of said 'vidfk-ibiece through and arms .of ,the y'oke Ihaviiig igi'stereu ilanib'iiigiiieahs iii'cludihgsin :cdniemiuana blubi'iadapted tolreinovabiy occupyfid freiiitered with said base and radially arranged about a abiturs'in the lyiilr'e-ar'iiis istereaaeer; common center, said membershavin'g 's'uiiiaorting lturcsi'n space -sparing o the worlgebiece and intiieg ame piane; a Ushabeiycke "to bearlon sqigsapiiaea gsurface of: ape ,earre- 3e1- ieaehgs dlihiiibr, "the iiitriiiediatesection siicnaiiig member. Jai -ahiit ii' fi fte 1561:, c 6f"h'$'olieha'vih'g"a 'serew-thieaa'e'whble ther gamete 135 i?! w l f ish f i i f throughand. arms ofnthevyoke-having regiaereu z hol'e' =61 acir-ala ykiagllaiq azfifiq ahead be: adapted to removably occupyssia zrgiste'rea its inner end against thelcorrespondmg :abutjinfthayb'keiarmgjnairegistefefi aperen't-pl e. vw e fiir ad ustment 1b: the several ma ignant-spatelugszam. the'wcrk-iiiece arid 1 reconditioning.

2 fIn a wdi'k-holder havi n'g "a "base-a'nai-a .151 @455 gag 3f; 2:5;%it s l s fi ri dfisl 'f t 3 MWQ 'JFP F FP WlfiQPQS}? 953%: Z111}: screw.- ittenisled ctiirough. the 1)screw-thre'aid'e'vzi my ernflve improvemn ism W :m care as: dfjeaiidiahatefifto wearer, 1ampin means.mamaingin cdinbinationfaifluy rality of 'wbikahiece .supn rtmgaembers ri'id v withlsaid base and radially -arranged about} common vcenter, said Ini'emb'ers iiavmgsuppm- 7 ing surfaces all in the' saiiielpl'ane, ca U-c-"shap'e fydlre for-each saidjiiieniberftheintermediatesecv 7 tion of the;yoi re=ha ving at ficrewgtl ilfaged hole jpfin s fihe liiniqiifiwdraiyhihafidWhwa1fal bii Sfa he et o e a d msnietyo e a ngreesiipiioiiting isiiilface, thefs'upbbiting'Jsurface of istrd apertures, sihe' etaroun, ,a gr n fer each aen'bfrtssia m mbersfbemg gt'he bot'toirilsur iace said member mat ed t9 r ma =1 j j v5 62' a slot through Sim member through winch r i j fi jap i lf i; -WKe-M Q 3 5 -the acorresponding ..-pin .is adapted to extend. teredaperturesain spacedfapartlugs onthe work H ,A lpiece-and toibearJqntsaid supportingisurface of the corresponding member, an abutmenteplate w r i 5; for; eachsaidyszoke --rigid -with-said =base, and} an I r -D iituie'sfin heiy'blge arinsiandfregisteredfaliertures

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