US1936925A - Driving mechanism for slicing machines - Google Patents

Description

Nov. 28, 1933. F. 1.. VAN WEENEN DRIVING MECHANISM FOR SLICING MACHINES Filed Nov. 14, 1929 4 Sheets-Sheet 1 Nov. 28, 1933. F. 1.. VAN WEENEN DRIVING MECHANISM FOR SLICING MACHINES Filed Nov. 14, 1929 4 Sheets-Sheet 2 Nov. 28, 1933. F. 1.. VAN WEENEN ,9

DRIVING MECHANISM FOR SLICING MACHINES Filed Nov. 14, 1929 4 Sheets-Sheet 3 Q & v3

g 0/1. MW,

v Patented Nov. 28,? 1933 i TED STAT S.

Application November 14, 1929, Serial No. 107,268, and in Great Britain November 21, 1;),25

This invention relates to machines of the type in which thereis a rotating slicing knife and a carriage which reciprocates past the slicing 'knije so that a substance supported on the carriage may have successive slices cut therefrom by' thc knife as the substance is recurrently in'ovedfpas't the slicing knife. The substance to be sliced is fed with a step by stepmove-ment in a direction toward the cutting plane of the knife.

vide a drive for such a slicing machine which will permit driving theknife and carriage in unison by power or by manual means and also for operating either the carriage or knife by power or for operating the carriage only "by manual means. Also, it is possible to drive one of the parts by hand and the other by power. Such an arrangementis' desirable when it is desired to use the machine for slicing a variety of substances. y Another object of this invention is the provision of mechanism for accomplishing the above noted results and which mechanism readily enables one to change from one mode of .operationto another. Another object of this invention is'the provision of one or more. double-acting'clutch devices interposed between the power drive and the manual .Fig. 1 represents a side elevation'oi a device em-. 'bodying my invention with the 'coverplate over,

part or the driving mechanism removed;

Fig. 2 is a section substantially on the line 2 2 .of Fig. 1; Fig. 3 is a cross section on an enlarged scale of certain of the parts shownin Fig.2;

4U v Fig. 4 is a cross section on the line 44 of Fig. 3;

Fig. 5 is a cross section on the line 5-5 of Fig.

$; and

Fig. 6 is a detail of the mounting for the pulley" which is driven directly from the. motor.

Referring more particularly to Fig. v1, it will be noted that the slicing machine comprises a base,

1 having guide rods 2 supported on suitable brack-v ets such as 3; as in the ordinary construction of such slicing machines. A carriage 4 is adapted to be supported and guided bythe guide rods 2 as the carriage is moved therealong. The carriage is reciprocated along theguide rods 2 by means of the rotating crank 5 and connecting rod 6, the; latter being pivotally connected to thecrank and 'A fiy-wheel 11 having a handle :12 for rotating rotation of the fiy-wheel '11 caus'es' th'e c'arriage One object of the present invention is to pro a es c v y; t e or er be n c nn cted supporting stud30,said studbeing adjustable in the sprocket-29 acts as' a tensioning means forthe 95 I over the Ypul1eys'34 and 32. An arm--36 pivoted to the carriage in the usual manner. The crank 5' is rigidly-connected to a short shait 7 journaledin the frame 1, said shaft carrying a bevel" gear 8 at'its lower end.- This bevel gear 8 meshes with a similar bevel gear9 mounted onla shaftlO which so extends longitudinally of the base of the machine.

the same is rigidly mounted on the shaft 10 and 4 to reciprocate through the gears 8 and 9, crank 65,

5 and connecting ;rod 6. The features of the-de-i viceso far described are all old and well known.'

Rigidly securedtothebase member 1 is a bracket 13 whichrotatably supports the shaft 14 carry-.: ingith'e knife .15. The shaft 14 carriesasprocket- 16 over which is trained the'chain .1'7', the-latter being used to drive the sprocket when actuated by mechanismwhich I will. now, proceed to dese f be. I 1 I Referring more particularly-to Fi'gs .1,-2 and-3, it will be noted that the bracket 13 also supports a hollow drive shaft 18 having a longitudinal bore 19 for a purpose which will appear'later. Suitable anti-friction bearings 20 and .21 are interposed between the bearing22 of thebracket ,3 and the 330 hollow rotatable shaft 18 {The hollow rotatable shaft 18 is adapted to support the sprockets '23 by means of the chain 25 to a gear 26 mounted on a s'haftiZZYdriven by-means ofabevel gear 28 from the bevel gear 8 on the shafti'l; A'sprocket' 48 freely rotatable on a stud49 'engagesthe chain 25 and acts as a belt tightenertherefor, the stud 3.9 being adjustable'in the longitudinal slot 50'fin the bracket 13'. -The sprocket 24 also has the chain 17 trained thereover and this jchainiis also trained over-the sprocket 29 freely rotatable on a the longitudinalslot 31 inthe bracket 13 so that a chain 17. :In other'words, the "chain 1'7 istrained over the sprocketslG, 23 and 29; the latter being adjustable to impart a. suitable tension. to the chainl'l. 1

The hollow shaft 18, also rotatablysupports Ca pulley 32 and this pulley is adapted to be driven by. means of a motor 33 havingga'pulley34'theree on; through the intermediary of the belt 35 trained at"37 carries a roller 38 at its free endand this roller is yieldingly urged-intojengagement with a a run of the belt 35 'b'y means of a spring 39 connected to the arm 36 intermediate its ends and to the bracket-.13'at 40. The/arm -36; acts;as; a belttightener forthebelt'35." ;:-1 .1'16

The motor 33 acts as a power means fordriving the carriage and'the knife, or either one separately, and the handle 12 is the manual means used for selectively driving the knife and carriage,

or the carriage only, as may be desired. However,

if the sprockets 23 and 24 and the pulley 32 were rigidly connected to the hollow shaft 18, it would only be possible to drive the carriage and knife in unison and, when the manual means was being. used, it would be necessary to drive the motor as well as the carriage and the knife unless means I were provided for preventing this. In the device i illustrated in the drawings, however, applicant has disclosed a means for rendering the power driving means inoperative when the manual means is being used to drive eitherthe carriage, or both "the carriage and the knife, and means has also been provided for permitting the manual means and power means to selectively operate either the.

carriage orthe knife, or both, as the case may be. This resulthas been accomplished by means of suitable clutch devices interposed between each of the sprockets 23 and 24 and-the hollow shaft '18, and alsoby providing a suitable one-way clutch device between the pulley 32 and the hollowshaft 18. t f

Aswill be more clearly seen in Fig. 6, the pulley 32' is rotatable on a hub portion'4l keyed to the hollow shaft 13 by means 'of a'key 42. portion 41- has a pluralityof recesses 43 therein, eachof which has a cam surface 44, and a roller is interposed between the cam surface 44 and theadjacent surface of'the pulley 32.: Each of I the rollers 45 is urged in a clockwise direction by 'means'of a spring 46 bearing against the hub portion 41 adjacent-one end of the recess 43 and the bottom .of a recess in a suitable abutment member 47 which engages the roller 45.4 It will .in the recess54 also "has an enlarged'conical be noted from an inspection of Fig. 6 that, when.

thepulley .,32 is rotatedin-a clockwise direction,

the rollers 45 are rotated in a clockwise direction due to their" engagement with'the pulley 32 and this has a tendency to roll the rollers 45.over

the cam surface 44 towards the end of the recess 43 away from the spring 46. Since this end of the recess 43 is'of less width than the diameter of the, roller 45, the roller is wedged in between the camsurface 44 and the pulley 32, thuscausing the hub portion 41, to becarried in a clockwise direction along with the pulley 32 as the latter] is rotated. However, it will be noted thatif the hub portion 41 is rotated insteadof the pulley 32, the latter will remain stationary, since the rollers 45will then be rotated ina COllIltBI'rClOCkWiSG direction so as to tend to move said rollers into the larger portion of the recess 43. The advantages of this constructionvwill appear later.

. The mountings for. the sprocket 24 and the sprocket. 23 are identical but will be referred to by different reference numerals in order that there will beno confusion inthe "description; Referring now to Fig, 4,. it will be noted that the sprocket 24 is rotatably mounted on a hub portion 51 which is keyed tothe hollow shaft 18 by' a-suitable key 52. The hub portion 51 hasaplurality-of recesses 53 and 54 adapted to receive the pins 55. 'The'pin 55 in the recess 53 is surrounded by a spring 56 which abuts against, the enlarged conical head 57 on the pin and one end 58 ofthe recess 53. The pin 55 head 57 and-a spring 56- which surrounds the pin and is interposed between the enlarged coni-' cal head 57and' a removable abutment 59. held in place within the recess by means of a suit'able' the. hub portion 51. 'has a cam surface 63 such as to make the recess The hub 7,

pin 60 (Fig. 3) or by any othersuitable'f'astem ing means. 56 normally urge the pins 55 toward the center of the hub portion 51. Each of the pins 55 is provided with'a conical point .61 at its outer end.

In Fig. 4, the pins are shown in their extended position. In this position, the pins extend into the recesses 62 formed in the outer periphery of Each of the recesses 62 62 smaller at. oneend than at the other. Each of the recesses 62 has a roller 64 therein which extends substantially, the entire width of the hub portion, as best illustrated in Fig. 3.

.This roller 64 is,norrnally urged toward the smaller end of the recess 62 by means of the springs pressed abutment. 65 which has a spring 66 fitted within a recess 6'7 of the abutment memberand" It will be noted thatv the springs adirection opposite to the direction in which the smaller ends of the recesses 62 extend. Each of; these recesses68 is-also provided with rollers 69, abutments 70, springs '7l.and cam surfaces 72, which-are constructed in'tne same manner asthe rollers 64, abutments 65 and springs 66.-

Itwill, be noted, however, that there is no positive means for rendering the rollers69 inoperative for a purpose which will be described later.

'In Fig. 5, I

is identical with. the construction' of the hub portion of the sprocket 24shown in Fig.4, but in Fig. 5 I, have shown the pins in retracted position instead of in extended position, as in Fig. 4. It is unnecessary to proceed with a lengthy descriptionof Fig. 5, it onlyibeing nec-. essary to state that the parts 51 and 53' to have. shown the construction of. the hub portion for the sprocket, .23 andthis 72', inclusive, shown in Fig. 5, correspond with" the identical parts 51 and 53 to'72, inclusive, shown in Fig. 5..

1 A means is provided for selectively. extending or retracting the pins 55 and'55', asdesired, This means comprises a rod SO'having a bea ing portion '73' slidablewithin the recess 19 and bearing againstfthe periphery thereof, and also has an enlarged portion 74 also acting as a.

bearing portion for guiding the rod 30 within the recess 19 and this enlarged portion has-the oppositely inclined facesxi75 and '76 and the V-shaped groove77. The rod is provided with a suitable operating knob .73 secured to one end' thereof by means of thespin 79, or other suitable fastening means. is shown in its middle orfneutral positionand in this position, the pins 55 and 55 are re- In Fig. 3, the rod 803 in j tracted'by the action of the springs 56 and 56, and the rollers 64 and 64' operate inthe same manner as they. would ifthe pins 55 vand 55' were not included in the hub structure at all.

However, longitudinal movement of the rod 80 to the left causes the conical portions 57' of the pins 55' to rideup over'the inclined portion 75 and into the recess. 77 of the'enlarged portion '74.' This throws the pins 55' into the position shown for thepins 55 in Fig.4. A simi-- are extended, the-pins 55 are retracted and' vice versa. e

I will now proceed to describe the operation of the device'when the rod is in each of;

its three positions of adjustment. For the purposes of description, we will refer to the middle position as the neutral positionand tothe other two positions of the rod 80 astheright' and the left positions, the terms rightand left referring to the parts as illustrated inFig, 3.

Assume first that the rod 80 is in its neutral position. In this position, the pins 55 and 55' are retracted so that the ro1lers64 and 64' o ccupy the positions illustrated for the rollers 64 in Fig. 5. I will consider first the action of the device when driven by means of the flyof the chain 25 and in a clockwise direction, as

viewed in Figs. 1, 4 and 5. Referring more'particularly to Fig. 5, it Will benoted that rotation of the sprocket 23 on the hub 51 will cause the rollers 69' to rotate in a clockwise direction towards the smaller end of the recesses 68' and will cause the rollers to bind. between the cam surfaces 72 and the inner bearing surface of the sprocket 23, thereby causing the hub portion 51 torotate with thesprocket 23. This also causes rotation of the hub portion 51 due tothe fact that the hub portions 51 and 51 are both keyed to. the hollow shaft 18. The rollers 64',

however, are also rotated in a'clockwise direction but towards the larger ends of the recesses 62' and therefore there is no binding connection between the rollers 64" and the inner periphery of the sprocket 23, although the rollers 64. are held lightly in contact therewith by means of the springs 66'. I l I Since the hub portion 51 is caused to rotate with the hub portion 51', there is a tendency for the cam surface 63 of the hub portion 51 to rotate the rollers 64 in a counter-clockwise direction so that the same are moved towards the smaller ends of the recesses 62, thereby causing the rollers 64 to bind against the inner bearingsurface of the sprocket 24 so that the same is caused to rotate with the hub portion 51. The hub portion 51 also has a tendency to rotate the rollers 69 in a counter-clockwise direction but towards the larger ends of the recesses 68, so that while the rollers 69 are held yieldingly in contact with the inner bearing surface of the sprocket 24 and the cam surface 72, there is nobinding contact therewith. Since the sprocket 24 is caused to rotate with the hub 51 when the rod 80 is in its neutral position, the knife will be driven by means of'the chain 17 trained over the sprocket 24 and the sprocket 16, the latter being rigid with the knife spindle. 4 is also caused to reciprocate through the connections previously described in View of the fact that there is always positive driving connection between the fly-wheel 11 and the carriage 4.

Assuming that the rod780 is still in its neutral position, it will be noted that although the carriage and the knife are caused to reciprocate by.- the manual operation of. the fiy-"wheel.11',there I is keyed thereto, there is no positivedriving con-i ends of the recesses, 43 against the action of the T the the same to rotatetherewith and, therefore,

] same to bind against the adjacentbearing surof the slicing machine described.

The carriage" is no rotationii'mparted to the pulley 32 View. of the fact thatwhile the hub v41 is caused to I rotate with the shaft 18 due to the fact 'thatit nection between the hub/11 and the pulley: 32 due to the fact that:a counter clockwise rotation is imparted to the rollers 45 and this has a" tendency to force the rollers'45 toward the larger springs 46 sdthat. while the rollers 45 aregyield ingly held in contact: with the bearing surfaceof the: pulley 32 adjacentth'e outer peripheryof the hub 41, there is no I positive binding contact between the rollers 45 and the'pulley 32 to cause the pulley 32 will remain at rest, thus forming an automatic means which permits the power driving means to remain at rest whenever the hand operating means is being used. I v 1 However, it will be noted that when it is desired to drivethe machineby means of the motor, motionis imparted-in a olockwise'direction to the pulley 32 and this moves the rollers 45 towards the smaller ends of the recesses. 43, causing'the face on thepulley 32 so that the hub 41'is caused v to rotate with the pulley 32. This rotation of course, also imparts rotation tothe shaft 18 and l the hub po'rtions 51 and \51' of the sprockets 24' and 23. With the rod 80 in' its neutral positiorr10'5 and with the shaft 18 power d'riven, motion ,is imparted to the sprocketsf24 and 23by means? of therollers 64tand 64", respectively,:asthe driV- ing is now being done by the hubportions and .wheneverthis is done, the rollers 64 and 64" form '110 I gear'28, gear 8,'shaft 7', crank 5fan'd connecting"11*5-'- rod 6, and the knife 15 is also positively driven by means of the chain 17 trained over the sprockets 24 and16. v I

From the above description,itwi1l be seenrthati when the rod 80 is in itsneutral position; the carriage will. be reciprocated and the'knife'will be rotatedwhether the machine .is power-drivenor manually driven- This is-the usual position of the rod 80: while slicingvsubstancesv by means If, now, we assume that the rod 80- is shifted to the left, it will be noted that'the rollers 64' in the hub portion 51 are rendered inoperative due to the fact that the pins 55 force'therollers 64", towards the :larger ends of the recesses 62'. If, now, the fly-wheel'll is rotated, the sprocket 23' isrotated the same. as before by means of the chain 25 and motion will'be imparted to the hub 51' through the rollers-69' which are forcedinto the smaller ends of the recesses 68, the same as when the rod 80 is in its neutral position. Again, the hubs 5 1and 41 arecaused to rotate with the hub 51 and motion-is imparted to the sprocket 24 by means of the rollers 64, the same as before; and the knife is rotated, it being understood that whenever the manually operated means is being used, thecarriage is also reciprocated, 'Theipulley 32 remains at rest as before; r

Assuming, however, that it is desired touse the power drive when therodSOis in the-lei't-hand 145 position,'it will benoted that, then, the pulley' 32 willldrivethe hub 41 and cause rotationbf' the hubs 51 and 5.1 Rotation of the hub 51 will cause rotation of the sprocket 24' and'consequently' the knife'1'5" due to theifaot. that 't h ar I v rollers64 are forcedi'nto the" sm'allerendsot the recesses 62. However, the rollers 64' associated with the hub portion "51", have been rendered inoperative by the pins 55' and, therefore, no

riage 14 will remain at restor maybe mo-ved by means of-the fly-wheel 11' and associated mechanism at a speed which is not greater than the speed at which the carriage would. be moved if'driven by the motor.

Therefore, when the rod 80,15 in its left-hand position, 'the'mot'orwilldrive only the knife,

and the carriage maybe moved as desired by themanual. control. This permits the "knife to a be" sharpened while being driven by the motor ithout the necessity of drivingthe carriagaand also'perrnits the carriage tobe'moved to a position where the parts ground off of the knife willi not fall thereon, it being undesirable. to have any foreign matter deposited on theslicing machine carriage. Withthis arrangement, it'is also possible to rotate the knife at a constant speed while the carriage is reciprocated at any desired speed; depending upon the characteristics of the substance being sliced, some substances requiring a longer draw out than others and the most efficientslicing thereof would not be'accomplished by having a carriage driven at a speed which is always proportional to the speed of the. slicing knife. l r

:Let us assume, lastly, that the rod SOis'in its right-hand. positionas seen in Fig; 3'.l This renders the rollers 64: associated'with the hub porw tion 5l,"inoperative. If, now, the manual means is'used to'reciprocate the carriage, the sprocket 23 will again be rotated and, in turn, will impart rotation to the hub 51 through the rollers 69" in the same manner as previously, and the hub portions 51 and il'are also caused to rotate, the. same being rigidly connected 'to' the shaft 18.:

However, nomotion .will be imparted .to the sprocket 24 from the hubportion 51 view of thefactithat the rollers-64 are inoperative. to. impart rotation to the sprocket 24 and the rollers j 69' can notimpart rotation to-the sprocket 24 because a rotationof the hub 51 in a clockwise,

direction hasa tendency to ,move the rollers 69 into the'larger ends o-f'the recessesdil, so that there is no positive binding contact betweenthe rollers 69 and the sprocket 24. Since thespr'ocket. 2a is not rotated, no motion is imparted tothe If,fno-w, the motor is started, motionwillbeimparted to the hub 41' and, as a result;

knife 15.

the hubs 51 and 51'. Again, since therollers 64 are rendered inoperative, no motion is-imparted to the sprocket 24, butmotion is imparted to-the sprocket 23 by means of the, rollers 64 which are in operative position due toythe fact that the pins 55. are retracted. Thus, the chain 25,'and, as a result, the carriagel, are positively driven; In other words, with the rod in itsright hand position, motion is imparted to the, carriage but not to the knife by either the manual drive or the motor drive. This arrangement is particularly desirable when slicing substances such as cheese,

' which is more readily sliced by a knife which is "free to rotate but not positively driven than by a knifewhich positively driven. In other words, the material is forced against the edge of by the operator is protected in case either the,

eating said table, va clutch interposed between the knifev th'e carriage is recipr'ocate'd and the knifeipresses its way through the'substance and forms slices which are moreuniform' and heater in appearance thanthcse cut'by means of or (0) while the carriage is recip'rocated by hand; and (d) the. carriage can be reciprocated while the knife remainsat rest. By turning the fly-wheel ll: (6) the carriage and knife can be driven in unison 1 and (f) the carriage can be. reciprocatedwhile' the kniferemains at rest..

A housingill on the bracket 13 has a cover plate. 82. This housing substantially encloses the driv ing connection. between theinotor and the shaft 18. A projection flange 83 extends outwardly from the housing .81 and substantially protects the sprockets23, 24, 29,48 and as well as the, chains 25 and 1'7, and also forms a means wherechain 17 or the chain 25 is broken.

The slicing. machine is also provided'with a de-.

flector 84, fastenedby means of the screws 85 to particular means for-driving the sprockets 23 and ZifrOm'thehub portions 151 and 51, respectively, or. for driving the hub portions by means i of therespective sprockets, I do not wish to be well known equivalents thereof can be used with-,. outdeparting from the spirit and scope of my invention. Q

The driving connection between the pulley 32 and the hub 41 may also bev varied, if desired, the

essentialfeature of the drive between the pulley 32 :and the hub l'being that motion can be imparted to the hub' il by the pulley 3211311111101 to l the pulley 32 by the hub 41.

Also, I wish it to be understood that my inven-' tion is capableof being-usedwith machines of a type different than, that illustrated. In other words, the invention'is also applicable to slicing 1 machines in whichthe carriage is pivoted, rotated or similarly mounted, and in which the knife may bemoved instead of the carriage, and in which the knife may have other movements than one purely of rotation. x 1

If desired,.the fly-wheel ll maybe mounted'on the shaft 10 in a manner similar to the manner in which the pulley 32' is mounted onthe shaft 18. Such an arrangement'will'permit the flywheel toremain at rest while the power means is l beingused. a w r i 1 Obviously thoseskilled the art may make various changes in the details arrangement of parts withoutv departing from spirit and scope of the invention as defined by the claims hereto appended, and I therefore do not wish to be restricted to the precise construction herein disclosed; I a 1 Having thus fully disclosed an embodiment of my invention, what I claim and desire to secure by LettersPatentof the United States is:

1 Aslicing machine comprising a slicing knife, a table adapted to reciprocate relatively thereto,.. manual means forrotating said knife and reciprolimited to-the specific means shown as any, of the motor while permitting .said clutch to remain operative with respect to the :manual driving means for said knife and said carriage;

3. A slicing machine comprising a reciprocating table, a rotatable knife, interconnectedmeans for normally driving said table and knife in unison when motion is imparted to either'one or the other by a suitable driving means, a clutch included in said means for driving said table and knife in unison, said clutch comprising a plural ity of elements normally caused to rotate in unison with each other by means of a plurality of friction devices acting in opposite directions, a

power means foropera-ting said knife through said clutch, a manual means for-operating; said table and knife through said clutch, and means for rendering one of said friction devices inoperative so that thedrive to said knife from said power means is inoperative at the same time-that the drive from said manual means'to said knife is inoperative. i

'4. A slicing machine comprising arotatable slicing knife, a carriage adapted to reciprocate relatively thereto, manual means for driving said carriage and knife, a clutch included in said manual drivingmeans, said clutch comprising a plurality of rotatable elements, one of which is constrained to move a definite remnan s said carriage at all times, the other of which has opera- I tive connection. with said knife, a-pairof means interposed between said'elements' for operatively connecting said elements in driving'relation each other, one of said last-mentioned means imparting rotation from one. element to' the other element when said first element is rotated in one direction, the other one of said pairof means 1m parting rotation from the second-mentioned element to said first-mentioned element, each of said pair of rneans being inoperative to operatively connect said elements driving relation with each'other' in a direction other than that specified, power means for actuating said carriage through said clutch,and means for rendering one of said pair" of means inoperative. I

5. Adevice-as claimed in claim 4 which includes a second'clutch interposed between said manual driving means and said knife and means for'rendering said second clutch inoperative.

6. A "slicing machine comprising a reciprocat ing carriage, a'rotatable knife, two clutches'interposed between said knife and said carriage foroperatively connecting 'saidkn'ife and carriage so that they will move in unison with each other,

each of said clutchescomprising a pair of rotatable members, friction elements interposed between said members, some of said'friction elements imparting rotation from one of said members to the other of said members while others of said elements impart rotation from said seco'nd-mentioned member to said first-mentioned member, and means for selectively rendering some of said elements'inoperative for the purposes specified. V

, eachof said clutches comprising a; pair of rotat ments imparting rotation 'from'o'ne of said'm'em-l means.

7. A slicing machine comprising a reciproca' ing carriage, a rotatable knife, two clutches terposed between said knife and said'c'arria'ge for operatively connecting said knife and carriage so that they'will move in unison with eachother,

able members, friction elements inter'posedbe tween said members, some of said frictionele bers to theother while others' of said elements- L impart rotation from said second-mentionedmember to said first-mentioned member,-'f'and means for selectively rendering some of said'ele merits inoperative for the purposes specified com prising a cam member and co-operatingf pins adapted toengage selected ones of said elements" for 'moving said elements" into"inoperative-posh tion' as said cam member is operated.

a slicingknife ofa'substance support, and means for'driving saidknifeand 'said support com ris: mg a rotatable shaft,'p'ower' meansfor actuating said shaft, a clutcnmounted'onsaid shaft having two elements rotatable relatively to each 7 other, {one of said elementsbeingmounted to rotate with said shaft and the 'otlierof said ele-- ments being 'operativelyconnected'to' said car riage, a manual means for 'actuating 's'aid carriage and said second element, means fo'r causing both of said elementsto rotate in unison with each other, operative connections" from said shaft to said knifeso that said knife and carriage may be both actuated byeither said power'meansj or said manual means while" said"elemerits j are causedto rotate with each other, and means ffor rendering said elements free to move relatively to' each other, so that the drive tosaid carriage from said power means is inoperative and so that said carriage maybe operatedby said-manualf 7 means while said knife is rotated by said'fpower 10. A device as claimed in cIaim-Qin-Which said elements have co-operating' spaced opposed; surfaces jbetween which are interposedfriction' elements which engage saidf-oppo'sedsurfaces with sufiicient force to causesaid clutch elements to rotate in unison with eachother andinWhiCh means is provided for rendering someof said;

operatively'connected to said manual means so asto rotateltherewith and the other of said elements being operatively connected to said power means to rotate when said power means is actuated, a tapered recess'in one of :said elements, afriction element arrangedwithin said tapered recess between said elements and normally adapted to contact with both of saidelements to cause said elements tokrotate in unison-with eachpther when one of said elements is rotated i being adapted tocausesaid Clutch-elements to rotate-in unisonwith each other when one of said clutchelements is-actuated by its driving in one directioma second tapered recess extending in the opposite direction to said first tapered recess and being formed-in the same one of said elements as said first recess, a'friction element in said second recess adapted to normally contact with both-of said. clutch elements when the other of said clutch elements isrotated inv the same direction, and means for;rendering one of said friction'elements inoperative so that the drive throughsaid clutch by one of said driving means is rendered inoperative... r

:12. In a slicing machine the combination with a carria ge, of a'rotating knife, power'means'for. rotating said k'nife,;manual means for reciprocating said table, a clutch arranged between the drive for said carriage and the drive for said knife'comprising a plurality -.of rotatable elements, one of said elements being actuated by said manualmeansandtheother of said elements being actuated by said power means, two

sets of friction elements arranged between said i clutch elements, one set of saidfrictionelements means and the other set of said frictionfelements being adapted to cause-said clutch elementsto rotate in unison with each other when the other i of said clutch elements is actuated, and means for rendering one of said friction elements in.-

. a carriage, of a rotating knife, powerimeans for,

- operative to thereby disconnect the drive through 'said clutch from one of saidactuatingmeans;

13. In a slicing machine, the combination with rotating said knifemanual'means for reciprocating said tabla-a clutch arranged between, the

drive for said 'carriage and the drive for said knife comprising a plurality of rotatable ,ele. ments, one of ,said elements being actuatedby said manualmeans andthe other of said elements 1 being actuated by said power meanatwo'sets} of friction; elements arranged between said clutch elements, one'set of said friction elements,

being adapted to cause said, clutch elementsto rotate in' unison'with each otherfwhen one; of

- said clutchelements is actuated by its driving.

means, the othervset of said frictionelements being adapted to cause said clutch elements torotate in unison. with each other when the-otherofjsa id clutch; elements is actuated, and means for rendering one-of said sets of friction elements inoperative to I thereby disconnect the vdrive through said clutch from one of said actuating means comprising. a pin, and cam "means for moving said pin against. said friction element to thereby:v move said friction element out of opera tive position. 1 I

ment, operative connection between said second j 17, In aslicing machine, the combination with? V clutch element and said knife, a manual means for driving said shaft, power means for driving said shaft, and means for moving said driving element. into inoperativeposition so as to render. the drive to said knife through said clutch inoperative, said power means'and said manual means beingalso operatively connected to said carriage to drive the same independently of said drive to said ,knife. 7 W 1 v a A 15. A device as claimed in claim 14 in'which the drivingmeans for causing, said clutchielee ments to move in unison with each other comprises a friction roller'interposedbetween said elements andbeing adapted to frictionally engage both of said elements when said first element is; actuated and inwhich the means for rendering the said driving means, inoperative comprises a pin for moving said frictionfroller out of normal operative position, and 'a cam for actuating said pin.

, 1'6. In a slicing machine, thecombination with a slicing knife,- of a carriage movable relative thereto, means fordriving said carriage, means for rotating said knife independently of the drive to said carriage, aclutch for connecting said knife to said carriage driving means, ,a sec- 7 0nd clutch. f or connecting said carriage to said disconnecting the drive from the other of said I elements to the, first of said elements. f

a carriagaof a knife me'ans for manually re ciprocating said carriage, power means-for actuating' said knife, a clutch for connecting said power means-to said carriage so-that said car-1 a,

ria'ge may be'driven bysaid power means-,means for connecting said knife to "saidmanual means so that said knife "may be actuated by said the drive to either-said knife or said carriage from i said power means inoperative, means for selectively connecting and disconnecting said 'manualmeans, means for selectively rendering manual means tosaid'knife, andmeans for pre f venting the rotation of said powenmean's by said manual means when said manual means is being actuated.

18..A slicing m achinegcomprising a knife and carriage movable relative to each other, ,said' knife being also mounted for rotativ'e movement about'its axis, mechanismfor moving-said knife and tableirelative'to each other, mechanism for rotating said knife, :two separate driving means,

and a clutch interposed between both of .said mechanisms and each of said driving means'comprising aplurality of elementsrotatable relative,

to each other, a plurality of connecting elements,

arranged between said clutch elements, some of; said connecting elements being operative to cause rotation of both of said elements in unison with each otherwhenjone of said elements is actuated in one direction while permitting free movement:

ative without destroying the operativeness of the.

remaining elements.

19. A slicing machine comprising a knife and carriage movable relative to each other, said knife being also mounted for rotative movement about its axis, mechanism for moving said/knife and table relative to each other, mechanism for rotating said knife, two separate driving means, and a clutch interposed between both. of said mechanisms and each of said driving means comprising a plurality of elementsrotatable relative to each other, a plurality of connecting elements arranged between said clutch elements, some of said connecting elements being operative to cause rotation of both of said elements in unison with each other when one of said elements. is actuated inone direction whilepermitting free movement relative to each other in the opposite direction and some of the others of said connecting elements being adapted, to cause rotation of both of said clutch elements in unison with eachother when the other of said clutch elements is rotated in the .samedirection as the first mentioned clutch element while permitting relative movement of said parts in the opposite direction, and vmeans for rendering all of the connecting elements having the same identical purpose inoperative without destroying the operativeness of the remaining elements comprising a plurality of pins normally spring-pressed out of a position inwhich they will render said recess in said clutch element, a second clutch,

element rotatable'relative to said first clutch element having a surface thereon opposed to said inclined surface of said recess, a friction element arranged between said clutch elements adapted to be wedged between said surfaces when one of said elements is rotated, a pin communicating with said recessv and adapted to be engaged by said cam member so that when said cam member actuates said pin, said pin will move into said recess and prevent said friction element from wedging itself between said opposed surfaces thereby preventing the rotation of said clutch elements in unison with each other when one of said elements is rotated in the direction which normally causes said movement of said elements in unison, mechanismsfor moving said knife and table relative to eachother, and an operative connection from said clutch for driving said mechanism for driving said table and knife relative to each other, the disengaging of said friction elemen by said pin resulting in the disconnecting e of the driving through said clutch to one of said mechanisms.

- 21. A device as claimed in claim 20 in which one of the clutch elements is provided with an additional recess similar to said first recess and in which said recess has a friction roller which is adapted to cause said clutch elements to rotate in unison with each other when said first;

friction :roller is 1 inoperative and the. other of said elements is actuated 'in' one direction.

, 22. Ina slicing machine, the combination with a reciprocating carriage, of a" rotatable knife adapted to.slice substances'on said;carriage,.' manual means for actuating said carriagaea shaft, power means for actuating said shaft,-a'

connection from said shaft to saidknife'; a clutch Y,

being operatively connected to said power means v to rotate when saidpowerfmeans is actuated, a tapered recess in one of said elements, a friction element arranged within f saidltapered recess be tween' 'said elements and normally adapted to contact. withboth of said elementsto cause said elements 'to rotate. in unison with each other when one of said elements is rotated in one direc tion, a second tapered recess in one. of said elements, a friction element in said second recess adapted to normally contact with one of said clutch elements when the other of said clutch ele- 1 05 ments is rotated in the same direction, and 1 means for rendering one of said friction elements inoperative so that the drive through said clutch by one of" said driving means is rendered inoper ative.' V

23. In a slicing machine, the combination with a rotatable slicing knife, of a ,carriage'adapted to reciprocate past said knife, driving mechanism connecting said carriage and knife to cause them to move in unison with each other, a clutch .1 insaid driving'mechanism, a plurality of means for actuating said driving mechanism'operating through said clutch to cause said knife and carriage to move in' unison with each other, andmeans for renderingsaid clutch inoperative for one of said actuating'means only; i

2a. In a slicing machine, the combination with a rotatable slicing knife, of a carriage adapted to reciprocate relative thereto, a driving means for actuating-said knife and carriage simultane 1 ously, a second driving means for actuating said knife and carriage simultaneously, a clutch mechanism between said two driving means, said clutch mechanism including two cooperating elements oneof which is adaptedtozbe'drive'n from one-,1 of said driving means and the other of which is driven from the other of said driving means whereby movement is imparted to said carriage and knife when either element is driven, operative engaging means between said clutch ele- 1 ments, and means for actuating said engaging means including means for rendering said clutch mechanism inoperative to impart reciprocation to said carriage when one of said driv lng' means is being operated while maintaining the driving. 1 relation to said knife when the other of said driving means is being operated.

25. In a slicing machine, the combination with a reciprocating table, of'a rotatable knife, manual means for driving said table, a clutch compris- 1 ing a pair of relatively rotatable elements, oppositely actinggroups of frictiondevices for operatively connecting said elements in driving fr'ements being operativewhen one of said elementsl and said knife, power means for actuating said last mentioned element, a driving connection between said manual means and said second mentioned element, whereby when both of said groups ofiiriction devices are operativa the manual ac tuation of said table also actuates said knife through said clutch elements and. also when said power means is actuated, said knifeand table are. driven through the intermediacy of said clutch elements; and means for rendering said first mentioned group of friction devices inoperative so that the driving connection between said first mentioned element and said second mentioned element is destroyed, whereby said second mentioned element remains at rest and the drive to said table from said element through said manual means is'inoperative without destroying the driving connection from said second element tosaid first element, whereby 'sai-d manual means may be actuated to drive both said knife and table even though said powermeans is connected only in driving relation'to said knife.

26. A slicing machine comprising a rotatable slicing knife, a carriage'adapted to be'moved relatively thereto, mechanism for driving said knife and for moving said knife and carriage relative to each other includinga double-acting clutch in said driving mechanism comprising'a plurality of cooperating rotatable elements, independent means for actuating each of said elements, a

' driving. connection from each of said'elernentsto said mechanism, for driving said knife and carrendering only that portion of said last mentioned driving means inoperative which drives" one of saidelements when'the other of said elements is merits does not rotate, and while said clutch at riage, means for connecting either element in driving relation with the other, and means for m the same time remains operativeto drive said sec- 0nd element when rotative movement is'imparted to the first of said elements in the same direc tion .as that imparted to said second element, means for connecting portions of said mechanism directly to one oflsaid elementa'and means for 7 connecting other portions of said mechanism directly to the other of. said elements, whereby upon rotation of the respective elements, only the portions of said mechanism connected thereto are actuated. j FRANCISCUS L; VAN WEENEN.

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