US2457310A

US2457310A - Cutting machine

Info

Publication number: US2457310A
Application number: US723235A
Authority: US
Inventors: David N Judelshon
Original assignee: Individual
Current assignee: Individual
Priority date: 1947-01-21
Filing date: 1947-01-21
Publication date: 1948-12-28
Anticipated expiration: 1965-12-28

Description

D. N. JUDELSHON Dec. 28, 1948.

GUTTING MAcHIim 6 Shets-Sheet 1 Filed Jan. 21. 1947 u INVENTOR. nvm N. ['ubeLsHoN BY neg 2s, 19481.

D. N. .JUDELSHON CUTTING MACHNE 6 sheets-sheet' 2 Filed Jan. 21, 194'? mmm" lflllhll INVENTOR.` DMW N. :Klum-.SHOM

ATTOR/VEYJ:`

Dec. 28, i948. D. N. JUDELsHoN 4575510 CUTTING MACHINE Filed Jan. 21. 1.947 f e sheets-sheet 3 l e5. 4l

74. y as H5 E n INVENTOR. BY uw uasLsHqN MAL- A TTORNEYS D. N. JUDELSHON CUTTING MACHINE Dec. 28, 1948.

Filed Jan. 21., 1947 A JNVENTOR.

13mm Junusuow ATTORNEYS D. N. JUDELSHON CUTTING MACHINE 6 Sheets-Shea#l 6 Filed Jan. 21, 1947 INVENTOR. :www JUDELSHON- AT TOR/VEYS machine spectivepositions in full lines and injbroken support which vspindle.

Patented Dec. 28, 1948 fnavia' N.Juaelshon,iirlgnidggiig; 1j; l `.amnicaemn January 21, 1947, serially@ 723,235 f My invention relates to a newv and improved cuttingmachine, forcutting materials such as cloth, paper and the like. Y

" My, invention particularly; relates to cutting machines of thevtype wherein a4 spirally wound vroll of mass ofthe stock is vrotated around a llongitudinal spindle Whichis iixed to the frame, vthe stock being thus krotated by means of achuck which is rotatably mounted on1'said spindle. In

va machine of this type, a rotatable disc knife may be mounted Vupon ,a knife-head which is turnable on a shaft ,which connects said knife- 'head to a knife-carriage vwhichis slidably mounted on longitudinal` rails 4or otherguides which'are parallelto the axis of the spindle.v

- .One object of my invention is-.toprovide irn-t proved means for rotating .the chuck; namely,

vby providing a speed-change mechanismffor the .`chuck-motor. n;

In many cases, it is desired to cutv the rolly of material or a part thereof, into a plurality. of slices of identical width. Another object of my invention is 'to provide` an automatic vgagawhich `can be manually set eithery intogoperating or non-operating position, by the use-of which it will -be unnecessary for the operator to make .aman- `ual adjustment of the knife-carriage` for each cutting .position thereof. Other objects of my invention are stated in .the following description` and ;drawings, which illustrate a preferred embodimentthereof.v I

- Fig'. l is a general front viewofthe improved The knife-carriage is shown-in two re lines. f l Fig. 2 is a side elevation, taken at theleftof Fig'. 1, showing the'knife-head in itsextreme non-operating position, in vwhich the knife isat its greatest distance from the stock.

Fig. 3 is a side elevation, taken lat the right ofFig. 1.

Fig. 4 is ay top plan-viewof the machine. y Fis. 5 is an elevation,partially infsection, o

Fig. e is a section annie une s-'-s ewig. 1.1;. v Fig. 7 is a perspective view ofthe automatic gage. Fig.' 8 is a section on the line 8 8. of Fig. 7;'

Fig. 9 is a detailelevation ofthe releasable is vprovided at one -end fofA the '.Fig. 1'0 is aside view ofFig; 9., partiallyvbroken away. mi 'i Fig. 5 shows .1a spirally wound rollorfmass of cloth or other material I, which is-wound spirally inthe. usualzmannerf :upon ,a core-Sleeve la, which isfA made .of cardboard or other material which `canine easilycut. ,This core-sl'eeve I9 is mounted .turnably.,uponj afspindle 2, which is xed 4to the frame Fof the machine` Fig. 10v showsthe .end-portion of spindle 2 .which is at l the left, of"1ig.,1, The yleft-enel por- .tionjsfplamped releasably in the forked end of an armi 1, bymeanaQfiaxlamping Screw which preieraloly-loears;1,ipon s1;iindle 2 slightly above its median'horizontal plane, so that spindle 2 is iorceddownwardly `hy screw 6 against its seat in arm .1. Ihis'` arm ispivoted at8 vto a support or sections ofsaid roll I, Iwhich have been cut by the machine.

Rlefe'rringto Fig.;` 6, andwith the exception of -the very shortv cylindrical left lend-portion of said spindle' 2 .which is .x'e'd Atoarm 'I, said spindle 2 `is'n o-cylindr'it':alup v.tothe `point '2a of Fig. 6.

' Fig.V 5 shov Sjthat4 this non-cylindrical part of spird1efzhasja1 pianaf race, 2p. The entire spindlev 2. may p9 non-#cylindrical to the left of point `2a,`including the part of the spindle which is releasablyclamped to arm 1. The cut is made ats'aid planar'facefwhile the roll I and its core I9=are rotatgedlin, u1 nis o`r'1 and/While the disc-knife is also rotated, so that 'the edge of the disc-knife To the right of point 2a,"thespi`ndle 2 is cylindrical; andfitha's' a reduced cylindrical extension '217,l Whose end-.portion is threaded.

, :Adjacent to-thepoint'Za of Fig. 6, the cylindrical part ofthe spindle -`2 ts snugly in a Washer '`r bushi'n`g I5, Which is fixed to rotatable chuck 3i Said chuck `3 audits bushing I5 rotate freely relative"`fto7 spindle 2. I*AntiLfriction lbearings I6 `are!novided'fbettveen the 'chuck 3 and extension 2b. A clamping nut 2c rigidly fixes the spindle 2 to' the frame F of the machine.

Asfshownf'in detail in Fig. 6, the chuck 3 is providedwith a drive' pulley II,"Whose hub is reyleasalcily =f'xedtofsaid chuck 3 by means of a cla'riip'ingscrew"lI8; .Aslshown inA Fig. 1, and in greater detail in "Figa 2,'the vertical plate of the chuck `llzisg".provided 'with .a series of radial fpgrooves 5, -in whichirespective clamping dogs 4 r are located. Thesejdogs can be moved radially ,inwardly andoutwardly until.v their: points 4a z-,enter the. material` I., so as yto rotate the roll of 3 material and its coreV I9 in unison around the axis of spindle 2. These dogs 4 are fixed in holding position by conventional means.

The chuck 3 is rotated by means of a chuck motor 20. As shown in Fig. 1, the shaft of chuck motor is provided with a sprocket which is connected by means of a chain 2|, to a corresponding sprocket on a shaft 22 which is mounted turnably infthe frame".A This chuck-,motor 2| is fixed to the frame F. K

As shown in Fig. 3, a pulley 23 is fixed to

shaft

22 and 26 are frusto-conical and of,identical..taper1 The intermediate pulley has'two' frusth conical faces, Whose angle or`taper;.relative' toa; vertical plane, is identical' with the angle. or tapely. r`inner faces of pulleys"y 211* The belts 24 and 'asin-atc"wedge-shaped 'cresssections; as4 indicated' in1b'rol-:Vex`zi` lines i'n '-Fi'g: 4, which shows one of the runs ofV eachs'aidfhelt 24 and 2s. AEach"-edgeof emissiebeitimakesuie 4same angle with the vertical plane, as thei'espec- [tive frus'to-conical facesof "

pulleysy

21, 25,26, so 1 that each edge"ci f"'each said belt-Wr'nakes fullcntact ,with the respective' abuttingv frusta-,conical face.` v

y As shown iny Fig. 4, shaft 28i's" rtatable Vin bearings, 30 andtl'.k Bearing jhas'a pivot-arm 4300i which is turnably' mountedinffranjie-F, and

,4, atccthed sector 34 is fixed to framei. '.Afdetent-tooth is connected by ,ifodl3'6`to ..a"fir 1'ger piece 31which ispivotally. connected'at' to bearingL Y, ,Y

ThebearingjZ-il can thusbe` adjustally 'fixed to sector` 34, as indicatedbythe full-lineA and. bro'- kenlinepositions,,ofbearing-v3|linzFigc. A f

The shaft 28 can thus: be raised and.` lowered relative topulleys23-and III... v'

when shaft :eis mwered, the bottoni vportieri of driven beitlisal is.shifiedvltowaidsshaft,2a. thus decreasing the eifectivevdiameterfef ythe respective pulley-pair 25-26.1- Due tothe wedge shape of driven belt .29, thisy slides' pulleyy 25 towards" Duly ley: 26; thus shifting-thetopiportion of thezdriving ibelt 24 away @from shaft 28and-,increasing thefeffective diameter orthe: respective-:pulleypa-ir'zsf-z'n 1 The change in relativeeifectfive. f.diameterA bef -tween pulley pairs 27h-"25',y 25f-f26g5thusv. changes the` speed ratio .of thedrive between pulleys 23- soA that the angular velocity; oichuck: 3; can beadjustedfby raising and loweringmshaft.4 28.

The sliding movementofzpulley 25'5on shaftv28 4keeps the beltsi24and29 taut'ati-allrtimeszi: 1.1 y -"I he disc-'knife'BS'iSfXedtOl a: shaft 40; which is rctatablyl= mounted2 ina: knife-@head2 42|?, which fis 'iiiivotally1 lconnected-` to a 'lknife-carriage 42,

Awhich "is slidable hoiizontallyl-tb-and-fro inthe may be thedriving pair {or'the' driven plane of Fig. 1, which is designated as the longitudinal plane.

Fig. 5 shows the pivot shaft 43, which pivotally connects the head 4| to the horizontally and longitudinally slidable carriageV 42. The shaft 43 is freelyturnable relative to head 4|. The carriage 42 slides upon longitudinal guide-rails 44 which are fixed to the frame of the machine. These rails, are locatedsin longitudinalrecesses of the carriage 42, Aso vthat it;v cannon shift-transversely relative to the rails 44. The longitudinal position i of the carriage 42'may be adjusted by hand. For Figmi shows a. shaft 28, to which pulleys 21 and 25 are fixed. The inner faces of pulleys 12T this purpose, and as shown in Fig. 4, a handwhel45 is releasably fixed to a transverse shaft llqwhichjsturnably mounted in the carriage 42.

' A vg'ear 4'l'fi's fixed to the shaft 46. This gear 41 vknife 39 is not rotating. i

meshesz'withiaeornpanion gear which is xed to anshaft 4 9 which is parallel to shaft 46 and which i's also turnably mounted in the carriage 42. vSprocketsviill are xed to shaft 49. These sprock- The shaft 40 of the knife-39 isprovidedwwith as'procket which mesheswith adrive'fschain" 2 which i's-shownfiniBiasi-'152154, and-,5. 1-1 .uz-z This Vchaiiri I 52'f meshes with:j awsprocketrwliich is 'iii'ied to shaft-43, so that "th'e'fvknif e 39 Vis rotated by fshaft-43`gwfliich loperates. 'as' ay countershaft. f As'shownl'in'Fig". 4, anA 'arm 'Uli-'is iixed to'cr- 'riage 42;* Another arm 6 Ifiis'fixed at 62ft'ofarm 14.

if Asshcwri inffri'g ztsproeketss is connected by eccentricaiiypivoted" toi amV` s i.. :'Whenfarmrss 'is 'turned- "counterclockwiseffrom itsi'fp'osition-'fof fFig: 4;"the clutch-member 56 iss'lid "on-'its stud shaft by arm 58 towardsA clutch' member '527; thus `coupling the' friction 'clutch 56-51 and' rotating Vtur'ritn'e-head n. The arm wis provided with a stop 13, to limit the counterclockwise turning vmovement vof 'ar1'n58l` f-The conventional spring,

'clutchei'nernber '56T yieldinglyin iuncoupled *pos-i'- actuated by `vex'tensifirr 63" also automaticall'ycontrois the 'circuit of thechuckv-motor-Z andalso the circuit of knife-motor 55, so that the rotation ofthe material-'or stck |1issto'ppedg Wher'ithe The:knifeiiieadfarifis manually: tumedi if tuve 'btbI shaft' 43', towards and awayzfnomthestdckLd.

"edffposition on rod`11, by a lock nut 19.

iri order to makethe" required seriesl of cuts by vinearxs'of the knife 39. `.For thisfpurpose, and as shown in Fig.` 1 and Fig. 2, a rod 61 i's'provided, which has ahand-hold 88.*" This rod" 61 is'xed 'tltheknife` head4I. The knife head 4I- is prov ide'd with 'a counterweight B9, "softball it is normally biased to turn away from the stock I. This counterweight 59 also prevents thehead 4I from turning, whenshaftV 43 is -rotated. This weight 69 is adjustably fixed to anextension 4Ia of the head 4I. The usual knife vshield 1l) is also fixed tothe extension 4Ia. As showninFig. 2, a sing'lebolt 1I fixes the shiel`d`1iland the extension-Manto thehea'd 4I. Alga-ge 12 is xed to anv-extensi'ona ofthe arm 61.-v` f "'"Bymeans of this gage, th'eopera'tor can manually fnieasure `theflongitudinal distance between sccessive'cuts I l "'A-'gage is provided for manually shifting the knife-carriagev 42 ina serie'sjof :equal strokes, in`-order tocut the stock I into slices Aof vequal Width. l I. ,Y f "i Fig. '7 showsthatengage-carriage 15 is'movably associated with the knife-carriage 42. Respective andy equal tension springs 16"and 16a longitudinally-urgethe gage-carriage 15 towards the knifecarriage 42.` The n'ds'of each saidspring are respectively fixed to the

carriages

42 and 15.

The rod 11. extends through'a bore of gagecarriage 15. Said bore is -locatedfclose to the respective end of gage-carriage 15. The diameter of the rod 11 is lessthanfthe diameter ofthe bore of carriage 15. As aneX'a'mple, if thediameter o'f-said bore isv 0.75 inch', the'diameter ofrod 11 is about 0.62 inch. As shown in Fig. '7, the gage- Acarriage 15 has a' vertical recessfinto 4which the 'carriage 15 has a," limited rocking movement aroun'd a-vertical axis, relative t0 the respective AA gage-nutA 18 is adjustably fixed to rod 11. vSaid gage-nut 18'is releasably locked in its' adjust- A scale 88' is' fixed toknife-carriage 42, and an index or pointer 88a is xed to gage-carriage 15. f

Fig. 7 shows a part of the knife head 4I, which is provided with anintegral pin 84. abuts a rod 85 which-is located in a helical spring 83.*On'e'fend of saidhelical spring 83 is fixed to-the pin 84. II'he 'other end of said helical spring '83 is xed `to theresp'ective `end. of an #angular 'frod 82.

The rods 85 .and 82'arfe notxed't'o'each other.' There is alsmall space between the adja- -cent ends 'of rods 85v and 82'. Therod 85 mayor mayino't beflxed topin84. When theturnable head -4I` is moved in the direction of the `arrow '8| away from thel stock/'I to its non-operative "position, the pin 84 abuts the rod 85, so that rod 85 pushes rod 82,' thus`turningthe rod-82 clockwise as indicated' by the arrow 82a in- Fig. A'1.

When the'head V4I 'is turned towards the stock laway from the rod 82', ina direction reverse to the directionof arrow 8l, the tension spring 83 correspondingly turns the angular rod 82 counterclockwise. The angular rod 82 is 'fixed rigidly Vin the ybore of a head or collar 86 which is turnable about a vertical axis. As shown in Fig. 8, said'head `or vcollar 86 is xedby a set screw' 81-to' a vertical shaft 88.*which has an integral collar 89. ".'Fig 8 shows the shaft 88 in its down or on position, in which said collar 89 abuts a bushing 99, Awhich is fixed to the gage-carriage 15."4 Below lthis bushing' 90,v .the shaft 88 is provided with respective` superposed grooves 9i and 92. At its bottomfthe shaft 88 is provided with a clampin-g eccentric 93. Below saideccentric 93, the reduced end ofthe 'shaft 88 extendsbelow the gage-carriage 15. A stop 94 is xed to the bottom end of the shaft 88, in order to prevent the shaft 88 from being pulled upwardly out of the gage-carriage 15. A strip of friction material 95 is fixed to the gage-carriage 15. When the eccentric 93 is in the operating or vclamping position shown in Fig. 8, the gagecarriage 15 isA temporarily frictionally held to the respective rail 44, by the friction clamping strip 95 andeccentric 93. The eccentric 93 is turned to clamping position by pin 84 and

rods

85 and 82, when knife head 4I is turned away from lthe stock.- When knife head 4I is turned towards the `stock,` the tension spring 83 turns eccentric 93 to non-clamping position. y

When the shaft 88 is' pulled upwardly by hand toits up position, the automatic gaging mechanism fdoes notoperate. The spring-pressedjand turnable 4ball detent 95 lthen engages the lower groove 92 instead of engaging the upper groove 9'I, so that the eccentric 93 is heldfabove the friction clamping strip 95. k

If the operator wishes to cutthe stock into a series of slices of identical width, he sets the nut 1 8, until'the pointer 80a of the gage-carriage 151s alined with the corresponding scale-marking of scale 80, when gage-carriage 15 abuts the nut 18,4 as in the position of Fig. 7. The operator then pushes the shaft as to its down position of Fig. 8. s

As later described, the knife-carriage 42 is pro- .vided with automatic clamping or holding mecha- .nsm which r'elea'sably holds said knife-carriage `42 to the rails 44.

When the knife head 4I is in extreme non- 'cperating positiomwhich is shown in Fig. 2, the

knife-carriage 42 is released fromthe rails 44.

As the knife head 4I is turned to operating posi- 'tion to make the respective cut, the `knife-carriage 42 is clamped to rails 44, before the knife 39 touches the stock I.

At the time when the knife-carriage 42 is in position for making the first cut, the gage-carriage 15 abuts the knife-carriage 42 and said gagecarriage 15 is' spaced from nut 18, and the springs .land 16a are'under tension. The operator then turns the knife head 4I towards the stockl I. He

thus automatically clamps the knife-carriage 42 to the rails 44, and`he then automatically closes the circuits of the knife-motor 55 and the grindermotor 65 andthe chuck-motor 20, before the knife 39 touches the stock I.

`Asthe knife head 4I is thus turned towards the "stock I, the tension spring 83 turns the clamping `knife 39 has been moved out of contact with the stock. VAfter the knife head 4I has been moved a short distance away from the stock, the pin 84- androds. and `82l begin to turn the shaft 88 clockwise in the directionof arrow 82a, thus turning the clamping eccentric 93 into its clamping position. The gage-carriage 15is thus tems porarily xed tothe respective rail 44, before the r45` knife-'carriage 42 is released from the rails 44.

- .fWh'rle-the knjiie head .4| isain .the-extreme non-l operating position :f,Fig..2', theoperator lslides the temporarily released knife-carriage 42 aww-,from .the vtemporarily.-iixed gage-carriagefi, until the gage-nut 18 abuts thegajge-carliagge '15.` Thegagecarriage 15 is lclamped to ra single `face of the respective rail I44,121.15 apoint `Whichis very close tos-pring v16a. .and which, is substantiallyA transverselyespacedgfrom; spring `it. The spring 16a androd; ill are located.v very,1 `close tothe respgectivev end '|5f `of gagescarriage 15. Hence, `fvvl-lejn-the knifle-carriage 42 isA slid avvayr from the `.teIVnpo-rarily xed gage-carriage T5, -thefspring 16o. will slightly turn thel gage-carriagel-S relative yto itsassociated rail 4,4, so asto bind fthe. -gagef- .carriage l uponsaidgassociatedrail 44, thusen- `suri-ng a positive and reliable.holdingaction -upon the gage-carriage l5, Without` bindingthe gage- .carriage 'l5 to the rod Tl. y

operator turns lthe knife head`4| into operating .position towards the stock l to make thesec'ond cutthus automatica'dl'y turning rod 82 byv tension spring '85 to 'release thev gage-carriage 15 while the .knife-carriage@ lremains temporarily xed,. so fth'atftheequal tensionspring's 16 and 16a movethe .gage-carriage 'I5 into contact with the knife-carriageV 42, .without binding on the rail'44. These 'operations are repeated, to make any desired number of' cutsof equal width.` V When rthe shaft 88 is held in its "up position, the rod 82 is turned back and forth, Without clamping the gage-carriage 15, because the eccentriol 93 isheldabove the friction strip 95.

When the shaft` 88 is thus pulled to its "up position, the rod 82 is raised above rod 85. If desired, 4the rod. 85 and spring 83 may betemfporarily removed, if rod 85 is not ixed tovpin 84. jlAs .previously noted, I automatically clamp' the knife-carriage 42 to a rail or rails 44, while the knife SBfisbeing moved to cutting position and the carriage. 42is' held temporarily in xed'position while the respective cutis .being made. y

, For.. this purpose, and as shown in Fig. 5, the

.f l., .the knife-.carriage 42 has thus been shiftdintolposition for makingtheseeond cut, the

knife head 4| Vhas a bottom extension 91, 'in which l Aafcyliitidrical roll 98Uis rotatably mounted. This Arollwflilflias a smooth periphery.y This roll 98rides onthe'cam track 99 of a clamp member 00 which 'is pivotally connected at |0| .tothe :knife-carriage .42'. This clamp member |00 has a nut |02 ad-- justablyxed thereto. This nut yI 02 bears against a corresponding clamp vmember |03, Which is piV- ptedfat |.04a to the knife-carriage 42.v Hence, 'ivhen the knife head y4| andlthe v-knife 39'are Hmoved in ,unison towards the stock, the clamp memb'er |00 is operated so that its adjustable nut |;l!4 [pushesl a pin |05 which is slidable in a slidey'bearing of knifefcarriage 42. This pin |05 pushes a friction clamp-strip |06 which is provided ina Ir'eces'sllof VAknife-carriage 42, so as to clamp the jknife-c'arriage 42 against the respective rail.` 44. companion member' |03 operates. ,similar "clamping: mechanism.

Asalso shown in Fig. 5, a post |09 is fixed to,

fthe knife-carriage 42. .A rod. I0 is rigidly fixed to Atl`1el ?st. |09.l Ahelical compression spring lll, is "mounted-upon the rod H0, and the endfof4 the nspring. textends slightly beyondr the rod |10. 'Wh'en .theoperator turns'the head 4|- avvayjfro'm thestock, this free-part of the .compression spring vIrl acts as a resilient stop. Fig. 5 shows the knife head4| in its extreme non-operating position.

Fig. 2*'shows .the cable C which extends .from the switchbox Y64a to one of thev terminals of thechuck-motor 20..4 There is a supplemental grinder H2 whichremoves the burr which is formed by the main grinder Wheelli. y As show n in fFig., 3, this 'supplemental grinderv I |2 is mountedzin abracket |I-3, which is turnably connected atv jH4 to lcarriage 42. Y

` As shown in Fig. 2, .the grinder motor 65 is mounted on a block H5 which is adjustable in a .direction perpendicular to the plane` of Fig.y 2, relative to the block H6. `The block H5 is thus adjusted, relativeto the-block H5, byrotating the hand -Whjeel `H'Lwhich .operates a convenu tional adjusting screw. The block isy adinstable in andirection parallel to the planeof Fig.,2,.,relati-ve to the block H8, this yadjustment being Y,made :by the `vhand wheel ||`9 which4 0p.- erates a conventional adjusting screw.

I.'Ilieblock l|8. is turnable aroundL a vertical axis relative to the' knife-carriage .42. y l

This mounting-of the grinder motorperrnits yaccurate adjustment of the grinder wheel. 06. Fig.'-1.shows a switchv box |20; which has a conventional reversing vswitch for Areversing. the .direction of rotationof the chuckmotor 20. Thisreversingswitch, not showmis operated by handle |2|.` A l I have described a'preferred embodiment of my invention, but numerous changes, omissions and additions can be made "Without departing from its` scope.

Y Thus, the knife motor can be controlled by an Aordinary switch,so that the `operation of-:the knife motor-,55l is independent of the position. of .thefkni-fe head 4| relative tothe stock.

llumerous-l other modifications are included within' the scope .of the invention. In this em.- bodiment, the mass of stock is a spirally wound roll, but the machine can operate .upon any mass of material. The gagecarriage 15- may also be designated as -a stop-carriage, because it stops thesliding movement of the knife-carriage 42. f

I claimri l. Ina' cutting machineo'f the type" which has a fra-me and in which a rotating 'massl ofstock is lcut/by a knife, a straight spindle for rrotatably supporting said mass of stock, said' spindle' `being fixed to said frame, .a chuck which isl rotatably mounted on said spindle, saidy .chuck .having .means ,for engaging and'rotating sai'd mass; a driven pulley fixed tosaidv chuck, adriven pulley mounted `on a drive shaft, a countershaft which isl-located vin labearing which is pivotally corrnected to` said frame by al pivot member which is loca-ted below said countershaft, .said driven pulley being located above said countershaft and saidv countershaft` being located above said driven pulley,said=countershaft having two outer pulleys fixed thereto and. having. an intermediate pulley 4 slidable thereon,.said. three pulleys having adjacent frustoconical. faces which. have the same angle, a drive belt which connects said drive pulley to .one .of said outer pulleys and to said intermediate pulley, adriven belt which., connects said driven pulley to the other ofA said outer pulleys andto said intermediate pulley,.sai:l belts having Wedgefshaped cross-,sections andv having4 side faces which contact with the respective frustaconical facesofsaid'pulleys on said countershaft 2. A cutting. lmachine of the type in which. a

rotating mass of stock cut by a knife, said machine having a frame, supporting means for supporting said mass to rotate relative to said frame around a selected axis, mass-rotating means adapted to rotate said mass relative to said frame around said selected axis, a knife-carriage, guide means for guiding said knife-carriage to move in a direction parallel to said selected axis, a rotatable shaft mounted in said knifecarriage, the axis of said rotatable shaft being parallel to said selected axis, a knife head pivoted on said rotatable shaft, said rotatable shaft being freely rotatable relative to said knife head, a clutch member fixed to said rotatable shaft, a supplemental shaft mounted on. said knifecarriage and alined with said rotatable shaft, a supplemental clutch member mounted on said supplemental shaft and slidable on said supplemental shaft to slide towards and away from said first-mentioned clutch-member, manually operated control means for coupling said clutchmembers, a disc-knife fixed to a knife-shaft which is mounted in said knife head, a knifemotor fixed to said knife carriage and connected by respective connecting means to said supplemental clutch member, said rotatable shaft being connected by respective connecting means to said knife shaft.

3. A cutting machine according to claim 2, said machine having a mass-rotating motor for operating said mass rotating means, a grindermotor connected to said knife head, a grinderwheel operated by said grinder-motor, and switch-means for controlling the circuit of said grinder-motor and said mass-rotating motor, and means operated by said manually operated control means for operating said switch means to close said circuits while said knife `head is moved in unison with said knife to operating cutting position and to open said circuits While said knife head is moved in unison with said knife to non-operating non-cutting-position.

4. A cutting machine which has a frame, a knife-carriage which is movable to-and-fro relative to said frame in a selected path, a knife head pivoted to said knife-carriage, a knife mounted on said knife head, holding means movably connected to said knife-carriage and adapted releasably to hold said knife-carriage to said frame when said holding means are in operating position, said holding means being movable to a non-operating position to release said knife-carriage from said frame, said holding means being operatively connected to said knife head, said knife head moving said holding means to operating position when said knife Ahead is moved towards cutting position; guide means for guiding said knife-carriage to move in said selected path.

5. A cutting machine which has a frame and a support for the material which is to be cut, a knife-carriage which is movable to-and-fro relative to said frame in a selected path, knife-carriage guide means for guiding said knife-carriage to move in said selected path, a knife head pivoted to said knife-carriage, a knife mounted in said knife head, a gage-carriage slidable on respective gage-carriage guide-means relative to said frame in said selected path and also slidable towards and away from said knife-carriage in said selected path, a stop xed to said knifecarriage, said stop being located to abut said gage-carriage to limit the movement of said knife-carriage away from said gage-carriage,

10 and gage-carriage holding-means for holding said gage-carriage releasably fixed to said frame. 6. A cutting machine according to claim 5, in which said gage-carriage holding means are operatively connected to said knife head to be moved into holding position when said knive head is moved away from said support and to be moved into release position when said knife head is moved towards said support.

7. A cutting machine according to claim 5, in which said gage-carriage holding means are operatively connected to said knife head to be moved into holding position when said knife is moved away from said support and to be moved into release position when said knife head is moved towards said support, said machine also having knife-carriage holding means for holding said knife-carriage releasably to said frame, said knife-carriage holding means being operatively connected to said knife head to be moved into holding position when said knife head is moved towards said support and to be moved into release position when said knife head is moved away from said support.

8. A cutting machine according to claim 5, in which said gage-carriage holding means are operatively connected to said knife head to be moved into holding position when said knife head is moved away from said support and to be moved into release position when said knife head is moved towards said support, said machine also having knife-carriage `holding means for holding said knife-carriage releasably to said frame, said knife-carriage holding means being operatively connected to said knife head to be moved into holding position when said knife head is moved towards said support and to be moved into release position when said knife head is moved away from said support, and spring means urging said gage-carriage towards said knifecarriage.

9. A cutting machine according to claim 5, in which said gage-carriage holding `means are operatively connected to said knife head to be moved into holding position when said knife head is moved away from said support and to be moved into release position when said knife head is moved towards said support, said gage-carriage guide-means being a single guide-member which is located and which fits loosely in an upstanding recess of said gage-carriage, said gage carriage having a limited turning movement around a vertical axis relative to said single guidemember, said gage-carriage holding means being friction means which are located and operative at only a single face of said recess, and a tension spring which is connected to said gage-carriage and to said knife-carriage, said tension spring being transversely spaced from said face of said recess to produce said limited turning movement when said gage-carriage holding means are in holding position and said knife-carriage is moved away from said gage-carriage.

DAVID N. JUDELSI-ION.l

REFERENCES CITED The following references are of record in the nie of lthis patent:

UNITED STATES PATENTS Number Name Date 1,242,488 Judelshon Oct. 9, 191'1 1,546,564 Cameron July 21, 1925 1,949,999 Frostad Mar. 6, 1934 2,398,929 Forsberg Apr. 23, 1946