US2000940A - Edging machine - Google Patents

Description

May 14, w35. J, FQSSA 2,000,940

EDGING MACHINE Filed June 9, 1934 Patented May-14, y1935 y y, "2,oqo,94olfff y 4Encima;`ivracm1naf` Josphsan/m1,v Mass., iassigno'rw United` y l Shoe MachneryrCorpol-ation, Paterson,N. La, l

A 8U Claims.-

, 'I'hisfinvention'relates to edging'machines and is ,hereinl illustrated asembodied in zan-e1ectri cally heated searing tool of thejtype illustrated in, v I .etterhs Patent o f ,y the United States*` No.- 5' 1,599,518,kgrantedwnseptember 14, 1926, on myapp lic a.tion. V 1 y l y t `Iy-xkijn'iachines ofthe type of that shown in the above mentioned patent-a heatedshrinking or searingtool is applied to the flesh sidefof` a piece of upper` leatherand by coaction lwith a` plow andyffsuitable feeding mechanism, the grain side of .theleather is causedto curl `over the flesh side and is hammered to provide afnishe'd edge." lI'ntheating such a searing toolelectrically@A currentscftheorder Yof -100 ampres arev utilized; .ItI i'snecessary, therefore,.in order. to avoid undueheating of the machine as a'wholegto conductythe current to the searing` tcolbysmeans offfheavyzsupplyconductors. {The t'ool itself is a1 uy-'shaped member of 'suitable metal' such, `for f example; as ,the metal known as nichrome or chromel'.' `This tool is pressed against the yWork under substantial pressure and is` heatedv approximately to` white heat (more jorless accordin'gyto tivly'small cross section because itis only desired to' apply'lheat to a narrow band'fadjacenti to the" Initheillustrated` ccnstructin; vthefseari'ngvf tool,- lllleithose' of the 'earlie`rmach'ines; comprises? a llshap'ed work contacting member which `is brfldgedacross supply `conductorsfAs nowffime proved; this` toolA isfremovably secured to'thez con-A ductonby lugs .having:groovesiy into: which kthe legsi'ot the' U-shap'ed` memberv are: forcedrto se- 45 eurenthemintightfrictionat engagement; *s These lugs are constructed and; arranged: to` engage Vthe major portonaofithelegs; along threeffacestheree of.' Atstheextreme lowerendof theU'nearvthe crossbar'forming the bottom' ofathe `Uthe legs their outer ysurfaces by. an'ges; crit-fthelugs.v As illustratedf, theisupply conductors. areI 4arranged vinve substantially .verticalzposition andhave hori-y 5 montargshouldersr'asigansiifwhicht theatopsof` the aref'supportedf alongztheir adjacentsurfaces and U-shaped memberJ-reststhereby.to-forestall verticaldisplacement. Simple;A easily operatedclampf ing means. a.re,1providedA to holdlv the! lugslllln thel searing4 tool in rm current-ecarryin`grelug: tion torthe.supply-conductora f vThese andother features of thexinventlony T35 y' scalegdfvl the inner face of the searingitoolf inidef 'I A LFig: I3 shows the searing tools; apprimetely fu11 sized, clampedatoathe supply c0nduot0rsj;= l Fig, iis. a section throughA apiece-0f the'woils uponr,an emerged scale Showingl fragments @ir the` Workv engaging( 0091s 0fV the. edging: machine;

Fie. fis aperspecifive upon aneniarfsedsele taken-fromftherear h winwfi pieeei wo k;- the toms leswc.iaiei therewith- ?nd the @fthe .fini-ih,ei 'v/.Qrly` .i Y. i In utilizing 'a niaczhirie Qi eral consiruotionrof .wiiichwiilibe anderem@ be ,liketiai Qi; ihemehine hewn-11i' the Batam .N0.f-1,599s51,8, to which refers Cee has tachedzrelation; j f

been ,made above; epieceloi work, su@ l i leather im--isfpositioned .upon work: sunnoties table l0 withzthefrfieshsliriae 2li-upward i, work mitte edge QffWhiCh-ilasrpr f @bis skivsdsonta-i1; abrupt; ansie.; isfied: past-fa Die 1.12 and benedire-searing@ ingatooifl! ,yf meansfof ,feedieet Weed; l1.' is held- 'fmiiiyageinst'y the @bleibst i idierpresser wheel-,118. V'iile mersimMvth ,1w k

yunshrlinken 9rgrain--Side 0i. e were i9 suive d tintas.hrlinksailr side.: "D o finsfthis I nil-i ramadan-into th .'.Specebstween nl? W911iMidnthPlQW; ,liz-L W k` I grasse upstandmgfiin -2014Jgis be i side; eff

Pivoted uponfthisffcap; is' ,ahamlLlever-fn: which i, is i arranged by v .mechanismIr not: shawn;V4

.www nl? and lower the presser wheel I8 in order to facilitate the presentation of a new piece of work.

Mounted upon the arms by means of pivot screws 34 is an L-shaped carrier 36 beneath which are supported heavy copper conductors 38 adapted to be connected through suitable insulated cables 40 to a source of supply of electrical current. These conductors are yheld within the carrier36 lby clamp bars 42 and 44,' and are insulated from the carrier and the clamp bars by pieces 46 and 48 of thin mica which are wrapped around the individual conductors. ends of the vertical portions of these conductors 38 are enlarged at 50, the enlarged portions being cut back upon a bevel from the corner 52 to insure the minimum of interference with the op.-` erators vision, and each conductor is provided with a substantially horizontal shoulder 54.

with a cross-bar 60 and upstanding legs 62, can be' of anyisuitable metal. It has been found that! an alloy known as chromel vprovides the desi-redmechanical strength and substantial resistance to oxidization. The legs'62 of the tool are substantially rectangular in cross section. Theyare received in grooves 64 provided in the inner faces of lugs 66,. 68. The Vtool is held in the lugs by `tight frictional engagement, seating inthe grooves 64lso tightly that the tool must be vforced into the'lugsby the application of substantial pressure. The upper ends 'I0 of the legs arev substantially iiush with the top faces 12 of the lugs so that, when the tool is positioned upon the conductors 38, the upper ends 10 willrestagainst the horizontal shoulders 54 upon therespective conductors, being clamped in this position by screws 14. This arrangement provides mechanical support against vertical pressure and the lugs are cut away to form notches I6 deep enough so that the shanks of thescrews 'f4-cannot seat against the lbottom of the notches. It will be observed also Vthat-the conductors' are provided with. vertical faces 80 against which the inner facesV of the lugs 66,

681may be tightly clamped as the screws are tightened.' -The inner -`faces of the legs 62 are either ushwith or project slightly beyond the inner faces of the lugs 66, |58.` I n-the latter case, the legs 62 will'be'clampedfindrect contact -with the eonductors.Y -The conductors 38 are provided with enlargements 5!) not only to provide-amplecurrent carrying capacity but also toprovide threaded-holes which are as long as possible for the reception of the clamp screws 14.* It willy be understood that'the voltageA drop across the tool'is comparatively small, being of the `nature'ofthree or four volts and also that, because of'the" ecessive current being carried, there is a tendency tov arcbetween all faces which are not yin firm contact.' ^It is to be understood that it is not possible to make the threaded vshanks of'gthe clamp screws14 fit the thread-1` ed openings in the conductors so tightlyA that they'willbe in contact throughout every portion ofthe shanks b-ut by providing the enlargements 50 upon the conductors'so as to thereby The lower the conductors 38, the arrangement being such that an operator can easily replace the tool with its lugs when necessary and will have no diiiiculty in properly clamping another tool in position.

It will be observed from Figs. 2, 3, and 5 that the cross-bar 60 at the bottom of the U-shapedl tool slopes downwardly in the direction of forward movement of the work as indicated by the arrow, i. e., toward the observer in Fig. 5. The

of variations in the thickness of the work, however', or in case' this threaded rod 82 is not properly adjusted, then a very considerable upward pres- Q sure may be exerted upon the searing tool which, The tool |4 which 1s AU-shaped, belng p rovldedv in its heated' condition would tend to distort it and force it forwardly in the direction of the movement of the work. At the same time, the n 204 tending to crowd between the tool I4 and the plow I2 may by constant pressure tend to force the crossbar of the tool away from the plow, thus varying the setting of the machine and preventing the production of good work. To aid-in mechanically supporting the tool in proper position, the lugs 66, 68 engage the legs 62 of the tool on three sides throughout the major portion of their lengths and have flanges 84 and-86 engaging the adjacent faces of the Ylegsvof the tool so as to give the maximum mechanical support against distortion. Because of the fact that there is a notable elongation of the crossbar 60 when the tool becomes heated, it is not desirable to provide support4 for the bottoms of the legs on all four sides.v They are, however, supported on their adjacent faces as just described and upon their outer facesby flanges 88' and 90. The latter flanges support the tool against any lateral pressure caused by crowding of the fin 204 betweenthe tool and the plow. v .v

The threaded rod 82, provided `for adjusting the tool vertically, is threaded in a bracket 92 secured upon the carrier 36 and the rod, Yonce positioned, may be clamped by a screw 94., A stop nut 96 prevents the operator from lowering the tool far enough to bring it into engagement with the table.

Provision is also made for adjustment of the tool laterally toward and away from the plow I2. This movement isy secured by reason of the pivotal mounting of the carrier 36 between the pivot screws 34 and its positionis determined by a stop screw 98 engaging the shoulder28 and threaded in the clamp bar 42.y This operates against a spring |00 and may be held in adjusted position by a clamp screw |02.l The operator is prevented by stop nuts |03 from bringing the iron against the plow. To support and protect the heavy conductors 40, these conductors are passed through holes in a fiberfblockY |04 attached tothe arm 22.` An

elongatedopen cover |06 above the conductors is pivoted upon the block |04 by pointed screws |08 and a loose joint between the carrierand the cover |06 is provided by aheaded screw I I0 and a spring |I2 tending to yhold the cover and the carrier yieldably together.

It will be seenthat my novel arrangement of a searing tool, .together with means. for supporting and clamping it in position, provides a construction` which will not readily become distorted and which makes it easy for the operator to replace the tool when 4that becomes necessary. i

Lposition of the tool with respect to the'work table f is determined by adjusting a threaded rod 82, the lower end of which engages the head of a screw 8 1 which holds the plow I2 in position. In case y thereto. It is to beobserved, furthermore, thatV the under surface of the crossbar 60 of the searing AAmple current-carryingfcontact between the toolr and the conductors enables the rapid dis semination of heat and avoids ,the formation of arcs.,V 'I'he tool is supported firmly in the desired relation to the plow I2 and may readily be adjusted both vertically or laterally with respect tool is beveled to provide an inner face 120 which gives room forth'e leather being turned upwardly'- conductors, a substantially U-shaped tool, lugs having grooves to receive the legs of said tool and in tight frictionalv engagement with these legs, and means for clamping the lugs respectively one to each conductor. n

2. -In an edging machine, a searing tool adapted to be detachably secured to current carrying conductors to bridge the same, said tool comprising a substantially U-shaped conductor of rela-,- tively small cross section and provided withldownwardly tapered fiat terminal lugs of relatively" large cross section with' inner faces disposed in the same plane, said lugs being providedl with grooves to receive the maior portion of the legs of the vU-shaped member thereby to provide me- 1 chanical support for said legs, and means to clamp said lugs against said conductors.

` 3. In an edging machine, heavy conductors adapted to be connected to asource 'of supply of electrical current, asearing tool detachably .se-

cured to said conductors, said tool comprisinga substantially U-shaped work engaging conductor having a crossbar at the bottom yof theU, lugs on the legs of the U-shaped member adapted tov be clamped to saidl first-mentioned conductors, said lugs having flanges engaging the adjacent surfaces upon the two legs ofthe U approximately f tothe base of the U.y

4. In an edging machine, a searing tool adapted l to be detachablysecured to current carrying`v conductors to bridge the same,`said tool compris-r ing a substantially -U-shaped conductor of rela-'- tively small crossfsection, andl lugs of .,relatively large cross section onthe legs of l"the U- shaped member, said lugs-having anges coacting with the outer faces of the legs to lsupport thesame. 45. In an edging machine, a searing tool adapted to be Vvdetachably secured to current carrying conductors to "bridge the same; said tool com-l 'f prising a substantially U-shaped conductor of* relatively small'cr'oss ysection,'and lugs of relatively large crossv section on vthe legsof the U- shaped member, 'said lugs having flanges coacting withthree sides of each legto support the same. 6. In an edging machine, heavy 'gconductors adapted to be connected to a sourcejof supply of electrical current, said conductors having' shoulders near their ends, a searing tool"com.

prising a lU-shaped work engaging conductor to bridgesaid supply conductors, lugs on the legs of said tool, and imeans for securingsaid lugs to said conductors `with vthe upper ends of vthe legs supported against heightwise pressure by the*` shoulders of the conductors.- n

7. In an edging machine, heavy'supply conductors, a U-shaped'searing tool bridgingl said conductors,` lugs secured to the legsof said tool leaving the inner faces of the legs exposed, and

lmeans for clamping the lugsto the conductors thereby to press the legs of the tool against upright faces on the conductors. l

8. In an edging machine, heavy supply conductors' disposed Vin upright position andA provided with horizontal shoulders neartheir lower ends,

a searing ytool'adapted to bridge said conductors y comprising a U-shapedwork-engaging conductor, the legs of` which rare supported Vby lsaid` shoulders, lugs onv the said legs, `and means for clamping `said lugs to: said supply conductors thereby`V to force the inner faces of the legs against they-faces on the conductors.

JOSEPH Fossa.V v

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