US1428292A

US1428292A - Knife guard for slicing machines

Info

Publication number: US1428292A
Authority: US
Inventors: Patrick J Lucey
Original assignee: Individual
Current assignee: Individual
Priority date: 1922-02-17
Filing date: 1922-02-17
Publication date: 1922-09-05
Anticipated expiration: 1939-09-05

Description

P. J. LUCEY. KNIFE .GUARD FOR SLICING MACHINES.

' APPLICATION FILED FEB. 17, 1922.

Patented Sept. 5, 1922..

. Patented Sept. 5, 1922.

, tunate AEN-r I PATRICK J. LUCEY, ORCHIGAGQ'ILLIN'OIS.

KNIFE GUARD EOE emot ve r cem s.

A iplication filed February 17 1e22, Serial no. 537,297.

To all whom it may concern: e

Be it known that I, PATRICK JJLUOEY, a

citizen of the United States, and a resident of the city of Chicago, county of Cookpand State of Illinois, have invented certain new and useful Improvements in Knife Guards for Slicing Machines, of which thefollowin is a specification' I p Iy invention relates to new and useful improvements in knife guards for slicing machines, and has for its object the provision of guard means for the entire edge of the knife, including the near-or slicing portion of said edge. v I

The slicing machines on the "marketare usually provided with guard means for covering the upper portion and far portionof I the knife,.leaving the inner orslicingportion of theknife exposed, and some of the machines are provided-with means for guarding the slicingportion by the use of a I member placed outward and at, theside, of

the cutting edge of the knife, usually. a bent the lack of guard means for effectively c0vering the cutting portion of. theknife edge. It has also been proposed to cover the cutting portion of the knife edgeby a means which is circularly slidable over the, old form of guard means at the top and fa r portion of the r knife, in order to uncover the knife edge, and is slidab leover the] cutting portion to cover the same, but this circus larly slidable or telescopic means is actuated by handrequiring constant attention,

and is therefore entirely impractical. V

It is my main object to avoid such unforaccidents and inconvenience as pointedoutabove, and to 1 provide guard means for fully and effectively covering the slicing portion of-the knifeedge, aswell as the remaining portions. v

It is my further'object to'fprovide' the guard means with a movable part forthe I slicing portion/of thefknifej edge, and prov Fig. 1 of my li 'cl' noulited n Position thereon, I Y .v i

vide means automatically actuated by the machine for" moving said said portion of the knife "during the effective slicing movement, and to again cover said portion during the reverse movement.

" Other objects will appear hereinafter."

part to uncover The invention consists in thecombinations and arrangements of; parts hereinafter described and claimedl The invention. will be b u d d by reference to ,the' accompanying drawings forming a' partfof thlS SIJGCIfiCZLtlOIl, and in which,

is a side eta-tat r the knife and Fig. 2 i3 an endelevation of the guard,

Fig. 3 is an enlarged vertical sectionon line 3-3ofFigl 1,

Fig. 4'is an enlarged vertical section on line 4& of Fig. 3, and

F g-.5 is ahorizontal s tj ofi i OfFigBQ." r Int e drawing I have shown a portion of the frame 10 of a well-known type of slicing machine provided with amovable table 11 and a supportingplate' l2 movably mounted on' said table. "Aknife 1 3 is rotatably mounted on a supporting bracket 14 providedon the upper end of a housing 15 extending from said frame.

The guard, for the knife comprises a curved member 18, substantially semicircul lar in crossjse'ction, which covers and guards the upper and the far portion of theiknife edge and is held in'position by means of upper brackets 19 and 19, fastened to the upperpart of the housing 15 and a bracket arm 20 fastened to the lower part'of said housing, in any suitable manner. To the above guard I also add a 'stationary guard for the cutting portionofthegknife edge in the form"of a curved r od" 21 positioned slightly outwardly from the edge of the knife andon the convex side thereof, and fastened at its upper end 'on the bracket arm l9-by means of a member 22, or in any coni venientf'ma nner, and mounted at its lower end 23 on; a bracket 24 attached to the housing 15. Both of theabove guards are retain'ed fixed in position.

In addition to the stationary guard means so far described, I-provideamovable or swingable guard means for-fullyan d effectively covering the cutting portion of knife edge, which means comprises a curved member 25 preferably semicircular in cross section which is provided at its upper end with a laterally extending arm 26 pivotally mounted in a lug 27 attached to the bracket 19, and is provided at its lower end with a corresponding arm 28 pivotally mounted in the bracket 24.

I provide means for automatically operating the movable guard, such means comprising a lug 29 which extends horizontally from the lower end of the guard 25 and is provided with a slot 30, A pivot pin 31 is movably positioned in' said slot and is fastened to the flattened end 32 of a reciprocatory plunger 33 which is longitudinally movable through an opening 34 in the frame 10. A bracket 35 is mounted in frame 10,

near the opening 34 andknife 13, and a shaft 36 is rotatably mounted in the lower part of said bracket. A bevel gear 37 is ad justably fastened on one end of shaft 36, as

with a set screw 38, and meshes with a bevel pinion'39 adjustably fastened on the usual driving shaft 40 of the slicing machines, and a washer ll is fastened on the opposite end of said shaft by means of a pin L2 or in any suitable manner. The bevel gear 37 is pro vided with a cam flange 43 half way around its rear face, and the plunger 33 has ,a: bearing shoe 4:4 adjustably mounted at its inner end, by a set screw l5 and a stem l6 and sleeve 4-7 on the plunger and shoe, or by any means suitable to adjust the shoe for wear. A spring 49 bears with one end against the inner wall of a chamber 50 provided in the bracket 35, and with the other end against the collar 51 mounted on the plunger 33 to constantly urge the shoe 1 1 against the rear face of the bevel gear 38 and cam flange 43.

In operation, as the driving shaft' iO is being actuated by the usual crank wheel (not shown) or other driving means, the pinion 39 fastened on said shaftrotates the gear 38. The number of teeth on thegear and on the pinion are so arranged that the gear makes one complete revolution during the time that the supporting table 11 makes one complete round of its to and fro motion with respect to the knife 13, and since the driving shaft 40 of the usual slicing machine makes two revolutions during the complete round or to and fro motion of the table, the ratio of teeth on the gear 38 and pinion 39 is 2 to 1. The movable guard and operating .mechanism therefor is so adjusted when. I

mount the same and while I fasten the pinion on thedriving shaft, that during thevslicing stroke of the machine or while the table 11 and plate 12 move toward'the knife, the cam 43 engages the shoe l i and moves the plunger 33 outward, thereby moving the lug 29 and swinging the attached guard 25 on its pivoting

arms

26 and 23, away from the knife edge, into the position shown in dotted lines in Fig. 2, thus clearing the cut ting portlon of said edge during the cutting or sllcmg stroke of the machine, and While the table makes its return movement cam as passes from under shoe l i permitting the spring 49 to force said shoe against the rear face of the gear 38 and to move shaft 33 inward and'again swing the guard 25 completely over the knife edge, and also over the stationary guard rod 21, thereby effectively covering the cutting portion of saic edge.

From the above disclosure, it is apparent that'I have provided an effective guard for fully covering the cutting portion'of the knife edge, as well as the upper and far portion thereof, whereby the formerly experienced dangerous accidentsare substantially avoided.

While I have illustrated and described the preferred form of construction for carryin my invention into effect, this is capable or variation and modification without departing from the spirit of the invention. I, therefore, do not wish to be limited to the precise details of construction set forth, but desire to avail myself of such variations and modifications as come within the scope of the appended claims.

Having. described my invention, what I clalm as new and desire to secure by Letters Patent is 1. In a machine of the class described, havp ing a rotatable knife, a knife guard laterally swingable over a peripheral portion of said knife, and means actuated by said machine for automatically operating said guard with said machine. 1

2. In combination with a slicing machine having a knife, stationary and movable guard means for said knife, and means actuated by said machine for automatically moving said movable guard means and expos- "ing the slicing portion of said knife durg the slicing movement of said machine. 3. In comblnatlon with a slicing machine having a knife a guard for said knife, in-

eluding pivoted guard means for entirely covering the slicing portion of said knife,

and means operated by a driving element of said machine for automatically swinging said. pivoted means. 1 I

4;. In combination with a slicing machine having a knife, stationary guard means for the upper, near and far portion'of the knife edge, additional guard means pivotally mounted for entirely covering the near portion of the knife edge, and means for automatically swinging said additional guard means.

5. In combination with a slicing machine having a knife, a 'guard'for covering the cuttingportion of the knife edge, brackets at the side of said knife,pivoting means on said'guard for swinging it laterally on said brackets, and means for automatically swinging said guard means during operation of said machine. v 6. In a slicing machine, in combination, a knife, guard means swingable over the cutting edge of said knife, a driving shaft, and means actuated by said driving shaft for automatically swinging said guard means. I 7. In a slicing machine, in combination, a driving shaft, a knife having guard-means, reciprocatory means for swinging said guard means,and means actuated by said driving shaft for operating said reciprocatory means. 8. In a slicing machine, in combination, a rotatable knife, a movable guard for said knife, a driving shaft, means actuated by said driving shaft for moving said guard away from said knife, said actuated means including resilient means for moving said guard over said knife.

9. In a slicing machine, in combination, a rotatable knife, a movable guard for said knife, a driving shaft, cam means actuated by said driving shaft, and reciprocatory means actuated by said cam means for moving said guard.

10. In a slicing machine, in combination, a rotatable knife, a driving shaft,'a movable guard for said knife, a member actuated by said driving shaft, a cam on saidmember, reciprocatory means provided with. an adj ustable Wear element. actuated by said cam, and means operativelyconnecting said reciprocatory means and said guard.

11. In a slicing machine, in combinatiom'a rotatable knife, a movable guard for said knife, a bracket, cam means mounted in said bracket, a driving shaft for said machine, means mounted on said driving shaft engaging and actuating said cam means, means movably mounted in said bracket and engaged by said cam means, and means operas tively. connecting said movable means and said guard for moving said guard to cover or uncover said knife.

12. In a slicing machine, in combination, a circular knife rotatably mounted on said machine, a swingable guard for the cutting portion of the edge of said knife, a bracket mounted in said machine, a driving shaft for said machine, a member mounted on said shaft, a rotatable member mounted in said bracket and actuated by said member, a cam on said rotatable member, a reciprocatory member mounted in said bracket, a wear element adjustably mounted on said reciprocatory'member being actuated by said cam, and means operatively connecting said reciprocatory member and said guard for swinging said guard over said knifeedge and away from'said edge during the operationof said driving shaft. 1. g

13. In a slicing machine, in combination, a

driving shaft, a rotatable knife, a table movable toward'and away from said knife, movable guard means for said knife, and means connected with and actuated by said driving shaft for automatically moving said guard means to uncover and cover said knife respectively during the to and fro motion of said table. I

14. In a slicing machine, in combination,

a rotatable knife, means for actuating said,

knife, aguard for said knife, including movable means for entirely covering the slicing portion of said knife, and means operated by said knife actuating means for automatically operating said movable means. I

15. In a slicing machine, in combination, a rotatable knlfe, driving mechanism forv a rotatable knife, stationary guard means for v the upper,the near and the farportion of the knife edge, additional guardmeans for entirely covering the near portion of said knife edge, and means actuated by the driving mechanism of said machine for automatically operating said additional guard means. vIn testimony whereofIhave signed my name to this specification in the presence of two subscribing witnesses.

. PATRICK J .LUCEY. Witnesses g FREDA C. APPLETON, J. DANIEL STUWE.