US1655442A - Cutting machine - Google Patents

Description

Jan.A i0,` T528.

W. C. STEWART CUTTING MACHINE Patented Jan. 10, 1928.

q UNITED lsrArizs wiLLieivi c. STEWART, or swniiiifsooTT, ivrAssAoHii'snTTs, Assieivon TojUNiTED. siion MAQHINERY CORPORATION, yor PATRSON, New ,iE-'Renna ooitr'oRATI'ON F NEV JERSEY.

CUTTING MACHINE.

Appiic'aaun med Decembersjo, 1924. seri-'ai 758,910.

This inventionrelates to cutting machines and is herein illustrated as embodied in a machine"forskiving the shanks 'of soles.

In the manufacture of the better grades of boots andsh'oes, the sole is shanked-out by being sk-ived -aloiigthe opposite margins 'at the shank portion thereof.r .The skived portions should be confined to that portion oit' the sole which lies between the ball line andthe heel breast line, since otherwise the thin edge produced by the skiving operation will extend into the orepart or the sole or into the heel, seat: and mar the appearance of the finished shoe. Ordinarily there are formed at the shank of a sole, in the shanking-out operation, two scarfs one on each margin `of theA sole, said scar-fs being separated by a narrow uncut locality of the same ythickness as the original thickness of the sole; but in some cases theV shankingput out extends entirely across the shank portion so that in'eect a single scarf havingvoppdA sitely inclined beveled portions results. In

order, therefore, to promote brevity as WellVV as'to avoid certain confusion which might otherwise occur in setting forth'the present invention, the scarf or sca-rfs which result when. the sole has been completely shankedout will be referred to as a single scarf.

This scarf should extend accurately from 'the ball line to the breast line of any iven sole, and since thel distance between these two lines varies with soles of. different lengths as well yas with soles of differentstyles, provision should be made for producing` scarisot predetermined varyinglengths. The general objectof the present inven tion is to provide an improved machine for carrying out these and similar operations in a rapid and satisfactory manner.

According to one feature or' the invention, means are provided for, ma'kingtwo ,separate scarts on the margin or a blank which overlap lengthwise so as to produces* a composite finished scarf which is longery than either of the separate scarisv by which it was produced, in combination with rmeans ioi' varyingl the ext-ent of the overlap of thel lseparate scarrs so as to varythe length of the finished scarf. By *providing means for locating the scaifs properly `with respect to the sole, the composite finished scraf may be caused to extend from the ball line to the breast line.

According to another feature Of the invention, two cutting mechanismsfadap'ted `each toi'nake aout in a blank are provided, together with means `for causing the blank to be operated upon by said mechanisms in succession `in such manner that 'the cu't'sfoverlap to produce a lfinished cut longer` than' eitherct the sepa-rate cuts.,KA

' In the illustrative `Emachine, itw'o `-skiving mechanisms, each including afma'tr'ixl roll7 are arranged in series, 'one mechanism being' adapted Ato make thefforepa'rt ofthe scarf atl the shank of a sole and the other to m'ake the rear part; a-nd each fskiv'ing mecl'iaiiism has associated with it a -feed mechanism which is adjustable to vvary vthelo'cality in the sole which is-pr'esented yto the matr-ix.

Bythusvarying the `presentation rofthe sole,v the two scarf/s may` be causedtofoverlap inoreory less and `thereby to produce afiii# fished scarf which is shorter 'or longer as may be 'desiredl 'n i y Y,

These and otherfeatures of the'` invention,

includinggeertain details or constructiony and combinations of parts, will bedescribed as rembodied in an illustrative 'machine and pointed Aout in theap'pende'd claims. s

Referring now to the accompanying draw- Figure 1 is ay plan olf a `v achine in which the present invention is embodied;

` `Figure 2 is a central longitudinal sectionr rv'with certa-in parts shown inelevation; and

Figures 3 and 4 are plans'of two `soles of vthe saine style but or different sizes ywith a vdiagrainmatic indication ofthe manner 'in `which the two overlappingscarfs produce Y the finished scarf in each case.

The rillustrative machine comprises' two.

skivijn'iechanisms arranged kvin series. The` first iiieclianismconsists of amatriX roll 5,

a piess'eiyroll 7 and afstationary lknife `9.r

Substantially"onefhalf of thefperiphery ,of the matrix roll is `out away to producefa" depression l() the surface of which lies below the surface of all of the remaining portionV or' the roll except for aynarrow Zone 1l the .surface of which is "ai continuation ,of the` surface df the cutaway portion l0. The e'X- treme ends of the roll are not cut away at Y all, since these ends' do notV come into Contactk withy the blank andare therefore ineffective. Certain ' portions 13 and 14 of the periphery of the roll, lying one on'one side and one on the otherv of the narrow zone 11, are cut away, but not as' deeplyv as the portion 10,

Bpi

to form a matriz; which is adapted, in c0- operatioii vwith the presser roll 7 and knife 9, to make the beveled scarf on opposite margins of the soles the path of which is indicated inxlfigs. 3 and t as lyingbetween Athemlinesr u, and l).

The second skiving mechanism is practically the same as the first except for the shape of its matrix; and to the parts of this second mechanism have been applied the same numerals increased by one hundred as have been applied to those ofthe first mechanism. This second skiving mechanism is adapted to make the scarf the pathl of which is indicated in Figs. 3 and 1l aslying between the lines c and d. It will -be,iioted that these scarfs, a to b, and c tocl, yoverlap and result in a finished composite scarfci to (Z, which is longer than either of the co'n'iponent searfs. 1t will also be noted that, by varying the extent of the overlap,

the extent of the finished scarf may be varied. Y f

Considering the two component scarfs a to and c to al, there is perhaps a slight :inaccuracy in the statements which have heen made above. The knife 9 actually cuts .fia

fd'uring such contact.

y(/to l) will be produced. ,that ,the rolls 105, 107 are also turning vall the way from a to Z9 but the knife 109 does not actually cut, or at most cuts a Very thin shaving, until it reaches the locality b,

Isince the matrix 118, 114C is, throughout most Lof its extent, of substantially the saine depth as that of the matrix 13, 14.

y Referring now once more to Figures 1 and 2, and to the first skiving mechanism, the c cut-awayportien or recess 10 is of sufficient Atoe end of the sole to the rolls in such manner that, as the sole is drawn between the -iolls, the forepart of the sole will pass uncut between the rolls until the ball line o is reached, and thereupon the leading end of the matrix will engage the sole and start the cut, it will be evident that the scarf Assuming now slowly, the operator may repeat the procedure witli'tliis 'difference that the matrix 1,13. 114 is caused to engage the sole at the rlocality C, whereupon the Yfinished scarf,

which was started by cutting from a to 5,

will 'be finished by the cut from 0 to UZ.

The present machine contains mechanism for feeding' soles to the skiving mechanisms in` succession after the manner described above but much more rapidly, said`iiiechanisin 'lieing unjust-able to cause the scarfs fz. to?) and c to (Z to overlap to different extents so ,as to talee care gi-if goles of different .their respective skivingl mechanisms.

lengths. This feed mechanism comprises vtwo feed slides 15, 17 slidably mounted in the frame of the machine and adjustable sig inultaneously in the same direction by .turning a rod 19 the left-hand end of which is threaded through a lug 20 depending from the feed slide la and the rightdiand end of which is threaded through a sleeve 21 which in turn threaded through the split hub of a lue' Q3 depending from the feed slide 17 and is held in adjusted position by a pinchsi'frew 25. The extreme right-hand end of the rod has a loose collar 27 which is pivoted at 29 to one end ot' a link 31 the other end of which is pivoted at 32:3 to the upper end of a lever 35, said lever being pivoted at 37 to the frame of the machine and having at its lower end aV roll which runs in a cam track L11 formed in a cam i3 fast to a shaft 45. 'li/hen the machine is at rest, it will thus be clear that the rod 19 is held from longitudinal movement so that rotation of it will adjust the feed slides 15 and 17 toward or from The feed slide 15 has an upstanding feed inember in the form of a lug;- L17 and the feed slide 17 an upstanding` lng; 49 which are adapted to engage the rear edges of the soles in succession and to push the soles forward until the forward ends of said soles are engaged by the rolls of the skiving` mechanisnis. r1`he soles are placed one at a time upon the feed slide 15 in front lof the feed member t7 either by the operator or by suitable automatic mechanisim such for example as by delivering the lowermoet sole from a stack in a magazine. rl'he slide, on its forward movement, delivers the toe end of thesole between the depressed portion 10 of thc matrix' roll i and the presser roll7. rl`he forepart of the sole is carried between the rolls and over the knife without being: cut until the matrixY 13, lll comes into engage ment with the sole, the locality at which this engagementoccurs depeiiiiling'upon the location of the path of rcciprmfation of the feed lue' 47. if, for example, the feed lug '17 has been moved into its extrcn'ie righthand position by turningij the rod 19, the cut of the knife 9 will begin at the lgreatest distance possible from the forward edge of the sole. lf, onthe other hand, the feed lug 47 has been adjusted into its extreme left-hand initial position, then the cut of theknife will begin at theV least possible distance from the forward edge of the sole. Thus by varying` the position of the feed lug 47. the location of the path of its reciprocation may be Yvarfed and the cut ft to placed, within limitsv` wherever desired on the sole. After the cut o to o has been made, the sole is delivered by pair of small rolls 51. 53 in front of the fred lngl 40 whereupon the sole is presented to the rolls 105, 107 and the rf from c to il madez f A' i loo lili) soles, such as that shown in Fig. 3, in such manner that the separate scarfs will have the locations on the sole shown in that ligure and that the composite, completed scarf will eXtend, as shown, from the ballline a to the breast line (l, and that it is now desired to skive the shank of the longer sole shown in Fig. 4l. Because the distance from ball line y to rear edge is greater' on a larO'er sole, feed lng' 47 must be adjusted rearwardly (to the left) in order to havethe first cut start at the ball line of the larger sole. Because the distance from breast line to rear edge is greater on a larger sole, feed lug 49 must be adjusted rearwardly in order to, have the second cut end at the breast line of thelarger sole. 1f, however, both feed lugs were adjusted rearwardly Vfthe saine distance, both cuts would `be moved bach, so to speak, the

same distance. The completed cut (made up of the two) Lwould then be of the same length as the larger sole as it was on the smaller one. Consequently, in order to, decrease the extent of overlap of the two scarfs e to l) and c to cl so as to malte the completed scarf on the largersole extend from the ballline to the breast line, the feed' lug 19yshould be adjusted rearwardly'but to a less'extent than is the feed lug 417'. To vthisA end the threads and 57, at the opposite Vends of the rod 19, areboth right-hand threads; but the' thrcads55 lare coarser than the threads 57, the pitches of these threads being so chosen that soles of different lengths may be properly skived.V i

ln sliiving the Shanks of soles in the manner which has been described above,` it is desirable Vthatvthe soles be held from angular movement so as to be presented in succession to the slfriving mechanisms in suchv manner that a selected axis ofthe sole (the lengthwise axis in the present case)-sl1all be main- `tained in the same relation to the edges of the knives of both mechanisms. To this end, 'each of the feed slides 15, 17 is provided with means for centering the sole laterally,

said means comprisingr a palr of breast-line p uides .and a pair of ballline guides.` ReiterringV first to the feed slide 15, there are pivoted to the rear portion thereof at 63 and 64, two arms 65, 67, the rear ends of which are geared together at 69 andv the forward `ends of which have upwardly turned ends 66,l 68. adapted to engage opposite pointson the edge of the sole in the vicinity of the ln'east line thereof, A1 screw 71, threaded through a lug'jon the frame of the machine, islooated in position to engage the rear end of theyarmG-/lfand openr the arms at their forward ends when thefeed slide is at the limit of its rearward movement. AAlso carried liythefslide 15 are two sets of parallel arms 7i-l, 76 pivoted at their rear ends to' lugs formed on the feed slide and havingI pivoted -vto their Yli'orward ends ball-line `guides 77, 79. The flat, operative faces fof vthese Luidesenoaee ouaosite edees ofthe a E) D sole in the vicinity of the ball line ofthe sole. l The inner arm 73 is connected with theinner ar1n'75 by a link 81 in such manner that the guides 77, 79 are compelled to'move `r`in unisontoward and yfrom each other.

In Vorder to openthe two sets of guides when the leed slide has been moved to its rearward position so as to permit a Sole to ,be placed upon the slide, as well as to close the sets of guides upon the sole when the feed slide moves forward, the arm 67 has integral with it an arm 83 which is connected with a part ofthe feed slide by a tension springy so that, after the arms 65, 67 have f been openedby contact of therear endof the 'arm` 67v with the screw 71 and the4 feed slide movesforward', this spring will swing the arms together to cause the guides 66,v 68

to engage the sole as shown; and this movement ofl the guide yarm 67, in connection with mechanism presently to be described, causes the opening andfclosing not only of the two sets of'guides 66, 68 and 77, 79, but4 of two similar sets of guides kwhich are mounted upon therfeed slide 17. The two sets of guide mechanism mounted upon the feed `slide 17, are substantially like those mounted upon. the feed slide 16. The breast-line set comprises two arms 87, 89

having u pstanding,r lugs or guides 91, 93 at their forward ends, the arms being?r pivotcd to the slideand geared together in the same manner as t rat in which the `guides 77, 79

are mounted upon the slide 15.y

Arod 99eonnec'ts all four of the two sets o f guides in the/followingl manner. The rod l is sustained by two sleeves 101, 108 pivotally Tril carried respectively yat the outer ends ofv arms 115, 117 which are integral respectivelywith thev links and 119. The arm 83 is p'ivotally connected vwith a sleeve 121; and an arm 123, which correspondsy to the arm 83,"is pivoted to a similar'sleeve`125. Threaded 'upon the rod-,99 and adjustably held in. place by set screws are three collars 127, 129 and 131. Ithas been explained that the arm 83 `is connected .to the feed slide 15 by a tension spring 85. In a similar manner the arm is also connected to the feed slide 15 by a tension spring 133, and the m1115112?? and 11.7 er@ CQIlIleCted respectively unire resjkioctivoly die sleeves 101 and 103 to the 'eed slide 17 by tension springs 135, 13T. lll/lien, therefore, the feed slides are retracted to their reerinost positions, end the extreme rear end of the arm 67 strikes the end et' the screw 71, the arm 83, by engagement ivith the head 139 on the left-hond end of the rod 90, pulls the rod to the leftrllie :lined collar 129 et the seme time pushes the sleeve 125 to the le'lt thereby opening the `guides 01, 03; und during' the movement ot the rod to the lei theV collars 127, 131 en- L and pi.. them to the lei't, thereby opening,- the lnill-line guides 7T, 79 and 95, 97. As soon is tie ifeed slides move forward tar enough o that the screw 71 no longer contacts With the extreme end or the erin 6T, the tension springs close the guides upon the soles :is shown inFig. 1.

Fou/er is applied to the shaft, 45 in any approved manner. A chain 1111 passes around n sprocket 11i-3 test to one end of the shaft l5 and around e smaller sprocket 1&5 fest to the shaft G1 on v.vhich the matrix roll 105 is mounted. fr second chain 147 passes around e. sprocket 149 on the shaft '61 und around a sprocket 151 .tast to the shalt 59 of the other matrix roll. The presser rolls and 107 are driven respectively from gears, one of which is shown et 152, fast, respectively, to the shafts 59 and 01. The smell feed rolls 51, 53 are geared together, und the roll 51 is driven through en idle gear 15T vvhich meshes 'ith the gear 15S one with e `ejenr, not shown, on the shaft el the feed roll 51.

fhe soles. which :ire tolle operated upon, :are first, sorted into `groups ziccordiiur to their lengths. The' rod 19 ,is then turned to adjust the fred nuwliziuiSn'i so theta it. will `deliver properly the soles oit :i `riveli `eroui').

The soles oit this group nre then placed one h v one upon the toed slide 15 ivhcu seid slide is in its reurniost position und the mvo sets oi guides G0, 0S and T7, T0 :ire open, nud ere led through the machine in the manner which h as been (flescribed. After the solos o i'f one group have been operated upon the machine is broughtl to rest and the rod 10 turned to adjust the Vfood niechenisni `i'or u second group.

,llthoueh the invention hns heen set. forth :is embodied in particular inuichine, it should be understood that the invention is vnot limited in the scope of its application tothe periculzir machine which has been shown and described. y

ilnving thus described my invention, what l cleiin us nevv und desire to secure by Letters. Patent of the United .States is V 1. A- nizichine ofthe class described having, coiulfinution` ineens Vfor melting tivo overlappingl scuris euch oi u lxed und predetern'iined length ou the margin of u blank to iroduce u, coml'icmite scart, und menus. 'tor lill .rot the composite sourir g e). .ILL

in .ceinbinntioin tvfo niecluinisins :idupted `euch to ineke :i cnt inV o blank, und menus tor cruising the blnnlr. to he operated upon by seid mechanisms in succession in such nier that the cuts overlap to produce :L composite cutlonglr than either otf the separate cuts.

-l. A n'iuchine olf the class described having, in coi'i'ibinntion, tuvo mechanisms adapted each to innlc e. cut in u blank, means ifor causing the blunhy to be operated upon by seid n'iecluniisms in succession ,in such ninnuer that the cuts overlap to produce n coniposite cut longeijthnu either et the seperate cuts, and ineens 'for varying the location of the seperate cut-s to very the extent or their overlap.

5. ine-.chine of the class describeil in conil'iinntien, tivo mechanisms arranged iu series end adapted euch to maize n cut in e blank fed to them, und ineens for feedii e; u blank in such manner that the cuts overlap inving,

machine o1 the cless described having,

to produce :i composite cut longer than either i of the seperate cuts.

6. A machine oiz the clrisr; described hslving, in combination. tive mcehuuislns urrei'iged in sericsnnd adapted each te nizilre :1 cutI in :i blunk :ted to thoin, ineens Yfor 'feedingY :i blank in such manner thatl the cuts over-hip to produce n composite cut longer tl' en either of the seperate cuts, und ineens for varyingr the operation et the teeding ineens to change the ent-ent of the overlap o'l the seperate ends und thereby the length ot the composite out.

7. A machine oiV the class described having', in combinetion` tivo cutting); mechanisms arranged in series, enc-h :ulnpted to multe :i cuter 'lined extent; in :i blank Yled to it, und

-nienns for feedingY n blank to seid mechenisins in succession in such u'iuuner that n selected axis of the blenk bears the seine relation to both mechanisms and the cuts ere caused to overlap whereby one out forms Yon extension et the other to produce a composite cut which is longer than either o't the successive cuts.

3: A innchine oli the class described having, in combination. two cutting mechanisms err .i "ed in series, euch adopted to niulio u cnt ot .fixed extent ,in n li'lenlr fed to it, ineens "for feeding; A blank to seid mechanisms in lll) tension of the other to produce a composite cut which isflonger than eitherof the .sue-

cess'life cuts, and means for adjustingthe feeding means to varythe extent-fof the overlap.

9. A machine of the `class described having, in combination, two .mechanisms arranged in sei-iesand adapted to make cennecting cuts in a blank, tivo rfeed mechanisms one associated with each cutting mechanism and having movable blank-engaging Ymembers, and means for varying the locations of the paths of movement of said movable members to` vary the locations of the cuts in the blank. f v

l0. A machine of the class described having', .in con'ibination` tivo mechanisms arranged in series and adaptedk to make Vconnecting cuts in a blank, tivo feed mechanisins one associated with e'acli cutting4 mech` anism and yhaving` movable blankfengagingmembers, and means for varying to different extents the locationslofthe paths ofmove'-V ment of said movable members to vary the locations of the cutsin the blank.

ll. A machine of theclass described-hav# zing, in combination, two mechanisms arranged in series and adapted. to make" connecting` cuts in a blank, two feed mechas nisms one associated with each Vcutting mechanism and' having" movable blank-engaging members, and means for simultaneously and differently varying,l the locations of the paths of movement of said movable members to vary the loca-tions of the cuts in the blank.

l2. A machine of the'class described having, in combination, a plurality of skiving mechanisms, feed slides associatedone with each mechanism, and means reciprocating the feedy slides in unison toward and from their respective skiving mechanisms,` the path of reciprocation of one slide being spaced a greater distance from its skiving' mechanism than is the path of the other feed slide.

13. A machine of the class described having', in combination, a plurality of skiving' mechanisms, feed slides associated one with each mechanism.v means reciprocating. the feed slides in unison toward and from their respective skiving mechanisms, the path of reciprocation of one slide being spaced a greater distance from its skiving' mechanism than is the path of the other feed slide, and means for changing` the locations of said paths.

14. A machine of the class described hav- Y ing, in combination. two skiving mechanisms arranged in series, feed mechanisms one associated with each skivinej mechanism, connections between said feed mechanisms such operate.

that .a selected that they arel operated. in unison, and 'means f.

for adjus'tinjir the feedfme'chanisins intofrdif-- ferent. initial positions to vary lthe vlocalities on theivork at Whichthe skivmg mechanisms 15in machineof the class described hav-y ing', in combination, tivo skiving mechanisms arranged inseries', .feed mechanisms one.ass0-' Veiated with each slrivinnmechanism, connections betweensaidfeed mechanisms.y siich that they areoperated in unison, and; means i for simultaneously adjusting the feed mechi anisins into different'initial positions to vary. the localities on the Work at which thcfskiw ing `mechanisms operate.

11G. rA machine ofthe class described ha`ving, in combinaticm,y a plurality of skiving.,r mechanisms each comprising a matrix roll,y feed members for each mechanism, means for moving the feed member-sin paths .the i y extent of Which is fixed. and njieans for varying tlie'zlocation 'of said pathsito Vary the localitieson the workat which thefskivingf mechanisms operate.` g

17; A; machine:ofther classdescribed.hav-fr4 ing,incombination, tivo skiving mechanisms arranged in series and; each comprisingfa 1iiat,ii:\1oll..ffeed mechanisms associated one with each skivin'g unechanisiii andeach com-l prisingI ka feed slide for engaging the Work,- a connection betiveen ther feed slides, and', means whereby the effective .lengthy of theL connection maybe varied;

18.1A machine of the class described .hav. ing, in combination.- two skivinrmechanisms arranged in series and each comprising a matrix roll, two feed slides associated respectively with the twoy skiving' mechanisms, means for operating the feed slides, means for adjusting the feed slides to different extents, and means for deliveringr blanks from the first skiving mechanism to the second feed slide.

19. A machine for skiving theA shank of a sole having, in combination, a. plurality of skiving` mechanisms, one` mechanism being adapted to produce the forepart of the desiredscarf and the other to produce the rear part, and means for feeding` the soley to said mechanisms in succession. v 20. A machine for skiving the shank of a sole having, in combination, a plurality of skiving mechanisms, one mechanism being adapted to produce the forepart of the desired scarf and the. other to produce the rear part, means for feedingrr the sole to said mechanisms "in succession, and means for varying the operation of the feeding means. to vary the localities on the blank at which the skiving mechanisms operate.

21. A machine for skiving the shank of a sole having, in combination, a plurality of skiving mechanisms each comprising` a matrix roll, feed slides associated one with each n'iechanism, means for reciprocating the loo CTI

slides in unison, and an adjusting member l mechanisms arranged in series each comprising a matrix` roll, feed slides one associated with each mechanism, means for reciprocating the feed slides inunison, means for delivering the sole from the first skiving mechanism to the second feed slide, and two guiding means associated one with each fee-d slide for engaging opposite edges of the sole.

23. A machine for skiving the shank of a sole having, in combination, two skiving mechanisms arranged in series each comprising a matrix roll, feed slides one yassociated with each mechanism, means for reciprocating the feed slides in unison, means for delivering the sole from the first skiving mechanism to the second feed slide, and two guiding means associated one with each feed slide for engaging opposite edges of the sole, the two guiding means being movable with their respective feed slides.

.24. A machine of the class described having, in combination, means for making two scarfs each of a fixed and predetermined length on the margin of a blank to produce a composite scarf, and means for varying the points on the blank at which the. scarfs begin.

25. A machine of the class described havzing, in combination, tivo cutting mechanisms for making two scarfs on the margin of a blank to produce a composite scarf, and means for feeding the blank successively to the mechanisms.

26. A machine for skiving the shank of a sole having, in combination, two skiving mechanisms arranged in series each comprising a matrix roll, feed slides one associated with each mechanism, means for reciprocating the feed slides in unison, means for delivering the sole from the first skiving mechanism to the second feed slide, two guiding means associated one with each feed slide for engaging opposite edges of the sole, the guiding means comprising guide members adapted to engage opposite edges of the sole, and means for opening said members to permit the sole to be placed between them and for thereafter closing the members upon the sole.

27. A machine for skivingthc shank of a sole having, in combination, a skiving mechanism, a feed slide for presenting the sole to the skiving mechanism, separable guide members mounted upon the slide and adapted to engage opposite edges of the sole, and means for separating the members when the feed slide is retracted and for causing the members to close upon the sole when the slide moves forward.

In testimony whereof I have signed my name to this specification.

WILLIAM C. STEWART.

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