US1078507A - Knife-grinder. - Google Patents

Description

E. C. LODMISe 4KNFE GRINDER. APPLICATION FILED 00T. i9, 19u.

l; 078,507, Patented N0v.11,1913. i 2 SHEBTSSHEET l.

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' 'www E. C. LUGMIS. KNIFE GRINDER.

APPLIGATIUN FILED 00119, 1911.

1,078507.. Patented Nov. 11, 191s.

SHEETl-SHEET 2.

. UNITEDSTATES PATENT y OFFICE.; f

nnvvIN o.' lLooNrIsl, `fo1r CHICAGO; ILLINOIS, AssIGNon-'zro srENGLnn BROTHERS COMPANY, omcnroaoo, ILLINOIS, A conPona'rIoN or ILLINOIS;

KNIFE-campani f a citizen 4of the United States,"residing at Chicago, in the county `of Cookand State -of I llinoisjhaveinvented 'certain newand useful Improvements in`Knife-Grinder`s, of which'the fpllotvin isa specification. 'fl

This invention rates vto means,-inoi'e speeifieally intended for"domes tic-use,- for'g'rinding knives and "other like"y implements, and one of the rincipal'objects of theinvention simple lvand Ainexpensivedeviceot ythe' clas described, 'which is eiiectiveii'i'opratio rhioth'erl `object-of y'th 1 entionfisto pro- .vide means f to"preventgtheA 4rindin'g"Wheelsv tion.

Av further Vobj ect?offfthe` :invention s to provide aj iiovel "constructioriof support-ing frame .for a device'fth ass described, whereby thei 'samema'y stamped out offapiecefofjmetal. For the attainment of" these "ends 'and the accomplishment".I -of-jother `new y'and `'useful objects,` as""=w ill -appearg'i the Ainvention -consists` in theY Afeatures of ndvelty inthe construction, combinatinfbandjarrangement, of the several parts-'generally 'shown in 'the .iaccompanying-drawingsand described in the specifica tion, b ut morei particularly pointed `out in theappendedclaims?V In thedrawingsFigure f1 is 'a side eleva tion of a knifegrinder embodying the principles'of my inventiongFig 2is a plan view ofthe same; Fig. 3 is a detailviewshowing a protecting clip; Figa is anend view of the grinder, parts-being om'itted;"l4`ig.l 5 is a'sectional. viewo'n the line 5 5 o'f- Fig. 2; Fig. 6 'is a perspective 'view of theframe .formed of a single piece ofsuitable material.

Referring now more' particularly to the drawings, the reference numeral 10 designates generally a :frame member forthe device. Thisfra'ne'lO is shown jmoreelearly f in Fig.*6,'in whichA the side'portions 11 are bent downwardly Vv ,nd'p'rovided 'with alined openingsz 12. One "side is also provided WithI additional openings' 13, by means of which it may be securedgtov any suitable support. Ext-ending upwardly'ffrom' the main por? tion of the framearef p'ortions14 and 15. These portions 14 and 15 are also provided.

"ver -23upon t ing shaft 2 1'may bevrotated in one direction bef?. economically A 'specificationofLeffersratent. Patentednovnniaia. apgnatiolea october 19,1911. serial-No; 655,619.

'operating' shaftv 21, provided at oneA end with a threaded stem 22,'and a hand lever 23 is mountedupon the stem 22.' No securing means is lprovided for retaining the lef 1e stem 22,550 thatthe operatwith. vopenirngsl and 17, andthe only. When .an attempt is made to rotate the` shatin the revcrse j direction, the hand lever-'1 23 is 4.turned 'on-the' stern' 22 without producing anyi rotation ofthe shaft: Mountedluponthe operating shaft'are gears 24,5Which`are provided with worm teeth and arel disposed upon the shaft so that the teeth' arevinclin'edin opposite directions.

Mounted in .the alined openings '.16 and `are shafts 25; These shafts are preferably provided with a conical opening 26 at each' side of the'shaft, vinto which thereiextends a conical tip 2.7=of a threaded screw pin 28. These'pins 28 are preferably threaded in the openings 1'6 and 17, and are each pro-' vided with a lock nut 29 to securethe vsereni pin .in position. Each shaft is rovided .with

a ring secured to it, or a shoul er 30 formed..

integral therewith adjacent the one end, and.'i

upon this end a plurality of grinding Wheels 31 are disposed, suitably lspaced apart by blocks 32 and retained in position upon the shaft by Ameans lof al lock nut 33.- The vshaft-s 25 are spaced apart, .the distance apart being vless than the diameter of one of-the grinding wheels 31,"so that -When the grind?? ing wheels are '1n position upon the shafts the contiguous edges ofthe wheels upon one shaft extend beyond the edges of the wheels mounted upon the other shaft; This necesf sita-tes thexs'pmringl apart j of. the grinding wheels, so that the edge of -o ne whee1 p'ojects -betweenthe edges vof two otherl wheels mounted upon the other shaft.:

To rotate the shafts 25, wormy gears 34 aremounted upon the shafts, preferably adjacent the end opposite to that'at vvihich the' grinding wheelsjfage located, and mhing with the gears liich are mounted upon the shaft/'21.

. v 11K- Will be evident that the direction of rotation: of one of the shafts'` will be opposite to that of the other shaft,

and that itwill bc impossible to rotatethe .wheels is retained`in upright position by Jfrom falling upon means of these guides. Y

To prevent the grindings from'the wheels' the gears 24, a shield 35- is providedfvvhich is secured to the frame .10 adjacent its horizontal portion and extends upwardly over the gears 24 below the. shafts A25. This -shield prevents "the 'g'ri'dingsfrom entering the teeth of ihe gears 24 and thereby causing thein to LWear unduly.

The upwardly extendingpdrtion 15 otthe frame is preferably formedwith a grooved portion 36,"inorde1;`to give it.- additional rigidity, and to the upper end of this portion 15 there is secured a shield 37, which extends over the gears 24, mounted upon the -shafts 25, and in closeproximity to the. grinding wheels mounted upon the shafts. The object of .this shield is Atofprotect the operator `from .the gears' 34, and to prevent the grindings from coming in contactwith the said Wheels. The-shield 37 also provides a4 supporting surface for an L shaped clip 38, which may' be secured to. the portion. 15 hy nieansxof a screw 39., which also secures the shield 3'(v to. the portion 15. Atthe., otherside of--theframe and' carried by :the upwardlyextc'ndin'g.portion 14 is a clip 40. Thcsefclips 38 and 40 'are preferablyfcomposed of a. softer'inaterialthan the material of which the. frame is constructed, so that it the sharpened cdgeof a knife or other article comes in contact with the clip the edge will not he injured thereby. The clips are in alinement with the guidcway formed by the guides 19.

WhatI claim is:

1.. Ina device of the class. described, the combination'with a frame member formed of a single sheet of material with upwardly extending pcrfoated portions, a pair of parallel shafts mounted at both ends ofthe shafts"l in said portions, grinding i'vheelsadjustably mountcdon-the shafts, atransverse' shaft' disposed below the other shafts and mounted `in theframe', intermeshing gears mounted-upon the shafts, and-means tojro-- 2. In a device of the; class described, a

' lel shafts,

vcomprisinga softginetalclip sec' frame elcmentmade of a single sheet of material formed4 with depending srde having alined openings, extending portions havinga plurality of alined openings. t--3. In a device of the'olass described, a

portions and with upwardly f fra-me element made of a single sheet-of nia- Aterial formed with'depending side portions havin alined openinffs, and with upwardly' exten ing'portions disposed substantially atright angles to the depending sides, oneof the upwardly extending portions being rounded and formed with a grooveto 'giveadditional rigidity.

4. In a knife grinder,` the combination ofA a frame element formed from a. single pice of sheet materialhaving opposite depending side portions andupwardly extending-por; tions disposed at right angles to the. de pending portions, said portions being`pro mounted in some of said openings, and' an operating shaft disposed `in other openingsat right angles thereto, grinding wheels adu justably positioned on the parallel shafts, worm gear wheels mounted upon the paralA transverse shaft to rotate it operatively only in one direction.

tions disposed at'right angles, said vportions being provided with alined openings, parallel shafts having bearing openings in t e ends, a screw pin having a hearing tip to fit the said opening and threaded in the alined openings for theshaft. lock nuts to retain the screw pins in position, grinding `wheels positioned on the shafts, and means positioncd in the frame to rotate the said shafts.

6. ,Tn a device. of the classdescribed, thef '85 vided with alined openings, parallel shafts f other gears mounted upon vthe-,.- transverse shaft anda-meshing with the firstnamed gears, and a crank threaded on the I 5. In a knife grinder, the combinationi of :iframe element formed Jfrom a single piece'. of resilient sheet material having depending Vside portions and upwardly' extending por- 100 combination with a frame elementvhaving upwardly extending -sides provided with alined opcnings,parallel shafts mounted -in' said openings, grinding; wheels adjustably mounted upon' the shafts, gears vsecuredto the shafts, means to rot te the shafts, and a shield secured to the ame element on one of the sides thereof and extending over the said gears on the shafts. I

7. In a device of the class described, the combination of a frame element having upwardly extending sides formed with alined openings, parallel shafts mounted in said openings, grinding wheels adjustably inount-` '125 ed upon the shafts, gears secured tothe shafts, means to `rotate the shafts, ,a shield secured 'toonej extending end of the frame 1 element and disposed'over the gears-11nd, tate each of the v.shafts in a single `direction.,'

the shld at one end of the frzun element,

and a soft metal clip positioned over the other upwardly extending side, the said @libs being in the line with the grinding p0'- ston;

In te'stirnony whereof I have signed my name to this specification, in the presence of two subscribing Witnesses, on this 17th day of October A. D. 1911.

EDWIN C. LOOMIF Witnesses:

ISAAC MOLL, NINA J. HALSNE.

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