US1846855A - Drive for slicing machines - Google Patents

Description

Feb. 23, 1932. J. FOLK 1,846,855

DRIVE FOR SLICING MACHINES Filed Nov. 8, 1926 2 Sheets-Sheet l Feb. 23, 1932. J. FOLK DRIVE FOR SLICING MACHINES Filed NOV. 8, 1926 2 Sheets-Sheet 2 lean and the most advantageous speed will Patented Feb. 23, 1932 UNITED STATES,

Josurrr FOLK, or LA roars, INDIANA, Assrsuon To U. s. SLIGING irac rrnucoia .FECE

PANY; or A roa'rn ivnmiva, A coaronn'rron or INDIANA I DRIVE non. snrorive MACHINES Application filed November}, 1926. Serial No. 146,918.

be of improved construction" and. operation and which will permit continuous variation of the speed ratio between'the motor and I driven parts from a mlnmlum to a maximum 7 ratio. e

Other objects will appear from thelfollow-i ing description. I

The invention is exemplified in the combi nation and arrangement of'parts shown in the accompanying drawings and described inthe following specification, and it is more particularly pointedout inthe appended claim. In the drawingse I i Fig. 1 is a horizontal sectional-vie through the base ofa slicing machine showing the variable speed transmission for driving the machine; and I Fig. 2 is a section substantially onlline of Fig. 1. l

In the operat on of slicing 'Inachines'itis found that difierent speeds are required for slicingditferent materials in order to secure the best results. Material-which. does not tear apart easily, such as dried beef, may besliced at a'higher rate of speed than othermaterials less. tenacious, such as boiled ham or v veal loaf. Diiferent pieces of material of the same kind differ from one another, as for example, ham wh1ch contains a great deal of fat is less tenacious than ham which contains more lean meat. Aham' whichcontainsa great deal of fat is best sliced at a.

lower rate of speed than one which is more depend also upon the temperature of the ;material being sliced. Boiled ham, for in-.

stance, may be sliced at a higher rate of speed when chilled to a point near the freezing point, but if it is very warm the same rate of speed would tendto tearthe slices apart.

.iVVhen a machine is operated by hand the speed may be readily regulated to correused for driving the machine it is desirable ;to have means'for adjustingthe speed ratio.

between thegmotor and the operating of the'slicing machine. In order to secure.

the mostsuitable speed for various materials it is desirable-that the variable speeddrive, shall be capable of fine adjustment between. the limits of speed available. 1 i 7 Another advantage of .the variable speed drive for a slicing machine is due to the fact 7 that the. speed of the motor will vary accord ilig-to variations in the voltage and this may be compensated for by changing the speed ratio so as to secure the desired speedof operation irrespective of the variation in the speed of the motor. The voltage on any line issubject to fluctuations at different times and voltages of different power systems differ from one another so that without means for changing the speed ratio between the motor andoperating parts, it will. be necessary to. design the motor or the reduction gearing for the particular circuit with which the.

machine is to be used Where a variable V which areciprocating work support lQ is slid v ably mounted. The slicing machine ispro-g vided with theusual rotary slicing knife13 driven by a sprocket chain l lex'tending up wardly from a sprocket wheel 15 which-isarranged to move into and outfof; driving engagement with a cone clutch 16." LThe,

clutch 16 is secured to a. shaft 1'? journaled in a bearing 18 supported within thebase of the slicing machine. The inner endof the shaft 1 7 carries a bevel gear l9l which meshes ith a crown gear 20xsecured toffan 1 u ri 'ht shaft 21 'ournaled vin'a bearin 22 supported by the top'plate of thelbaserl O.

The sprocket wheel 15' isprovidedlwith as second set ofsprocket teeth :which engage.

a sprocket chain 23 which passes fover' a f is pivoted at 28 on a bracket 29 carried by the base and is arranged to shift the sprocket wheel into and outof operative engagement with the cone clutch 16 to drive the shaft 17.

the side plates of the base 10 and extends transversely of the base parallel to the shaft 25. v A motor 32 is mounted on the side of the frame 10v and drives the shaft through worm gearing 33. Splined onthe shaft 25 is a pair of cone-shaped discs 34 having their conical surfaces facing each other. A similar pair of-discs 35 are splinedon the shaft 30. I A belt 36 extends between the pairs of discs 34 and 35 and is provided with bevel edges which engage the conical faces of the discs. The discs 34 and 35 are held against separation from each other by rollers 3'? which bear against the outer'faces of hub members 38 connected with the respective discs 34 and 35. The rollers 37 are, carried by lever arms 39. pivoted at 40 on brackets 41 projecting inwardly from the side walls of the frame 10. 'The levers 39 are held in i adjusted positions by slide blocks 42 mountengagement with the slide blocks 42. The opposite ends of the screw 44 are reversely threaded so that rotation of the screw in one direction moves the ends of the levers 39 to ward each other and rotation of the screw in .the opposite direction separates the ends of bevel gears with the screw 44 to facilitate the levers; The 'leversare provided with slots 47 for engaging pins 48 carried. by the slide blocks 42. A hand wheel 49 is journaled in the end of the frame 10 and is connected by rotation of the screw in either direction. It

7 will be readily understood thatby rotation of the screw in one direction the levers 39 will be swung about their pivots 40 to move the cones 35 inwardly toward each other and at V the same time the opposite ends of the levers 39 will be separated to permit separation of the cones 34. As the cones 35 approacheach other the belt 36 will becausedto travel out wardly to a greater diameter of the cones 35 and at the same time the cones 34"will be while the knife continues to rotate.

rection. Since the variation is continuous it is apparent that an infinite number of ratios is available and the speed may be adjusted with a reat degree of accuracy to any ratio require Since the reciprocating table is driven by the shaft 17 through the upright shaft 21 and since the knife 13 is driven directly from v A shaft 30 is journaledin bearings 31 in the sprocket wheel 15, it is apparent that by releasing the clutch- 16. the reciprocating table may be permitted to remain stationary This wbuld relieve the power drive from its heaviest load and from sudden changes in the load dueto reversal of direction of movement of the reciprocating table to facilitate shifting. ofthe discs 34 and 35, when desired. The

arrangement also makes it possible to permit ping from" the knife onto the meat or other commodity carried by the reciprocating table. This is 'ofgreat'advantag'e in many cases, for theyreason that it is inconvenient to remove the meat for 'grinding the knife, and if the table is permitted to continue reciprocationduring thegri'nding operation, there is danger that particles of the grinding stones and steel will fall upon the meat.

I claim v a The combination with a' slicing machine having a- ,rotary knife and a reciprocating table, of mechanism for driving said knife and-table, said ,mechamsm comprisingfa' driven shafthaving a toothed sprocket thereon, a clutch element'having a double row of sprocketteeth thereon-,"ashaft connected with said table having a clutch element cooperatmg with said first-mentioned clutch element,

a sprocket chain meshing with the sprocket teeth on said driven shaft and with one of said rows of teeth on said clutch element; and a second sprocket chain meshing with the other row of teeth-on'said clutch element to form a driving connection with said knife.

In testnnony whereof I have signed my November, A. Di 1926..

name to this specification on this 4th day of JOSEPH FOLK;

separated to permit the opposite end of the. 7

belt to travel. inwardly to a position on the cones '34 havingless diameter.- The move- 7. ment of" the belt is continuous through, all

' shaft 30 and theshaft 25. .To increase the.

intermediate positions so that j a continuously variablewspeed rat1o is secured between the speed ratiofthe hand wheel 49 .is rotated'in one direction and to decrease. the speed ratio the hand wheel is rotated in the opposite di- 7

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