US1324512A

US1324512A - Knife-sharp

Info

Publication number: US1324512A
Authority: US
Publication date: 1919-12-09
Anticipated expiration: 1936-12-09

Description

G. MAURER.

KNIFE SHARPENER.

APPLICATION FILED DEC-8, um.

Patent ed Dec. 9,1919.

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To allwhom it may concern; I

Bait known that I, GEORGE MAURER, a subject of the King of Hungary, (and Who has taken out his first papers for citizenship in the United States,) residing at Chicago, in

the county of Cook, and State of Illinois,

have invented a new and useful Improvement in Knife-Sharpeners, of which the following is a specification. a

My invention relates more particularly to knife-Sharpeners provided of a form adapting them to be carried inthe pocket 'of a garment, as for example by waiters or.

. others using knives, though certain features which it is adapted to be carried-aboutin thereof maybe incorporatedin-a device'intended to be supported. on a table or wall,

' My objects are to'provide anovel, simple, and economical construction of knife-sharpener, preferably in a form to be carried about in the pocket of a userand by which a knife maybe quickly sharpened to present the desired fineness of edge and in which the bodies of abrasive or cutting material provided may be quickly removed and replaced atwillp L Referring to Figure'lfis a face view of -my improved knife-sharpener showing it as completely opened up to disclose; details of construction,- the position shown being one not assumed by the 'device'in use, and with the means for restraining the opening of the device, disconnected. Fig. 2 is a top view of the device showing it in operative-position but with certain parts shown in disconnected condition. Figs. 3 and 4 are sections taken at the broken lines '3'3 and H, respectively, on Fig. 2 and viewed in the direction of the arrows; and Fig; 5, an end view of'the device in 'folded' condition in the pocket or a garment,

. The device comprises a casing constructed of a pair of hollow, preferablysubstantially

rectangular members

5 and 6, which may be of metal, and

side sections

5 and 6. The members 5 audit are hingedly connectedtogether' on the pintle 8=whichpasses-through ears 9'on the sections 5.-an d 6, acoiled spring 10 surrounding the" 'pin'tle between these ears and. hearing at its "opposite-feuds 11 against the'inner faces of the section's'5'and 6, operating toswing the sections 5 and '6 in a direction away from each 'other'ontheir hinge connection'. The Q opposite "sides of the sections'5 and- 6 are equippedw'i'th the Specification of Letters Patent.

the accompanying drawing,

iPatented Dec. 9, 1919.

Application filed December s; ieri. serial'no. 206,261.--

sections 5v and 6 which complete the 010 sure, these sections being secured to the see tions 5-and 6'by squared removable and replaceable pins-7 which passthrough ears '12 and 12 on these sections, the openings in these ears being square to prevent rotation Secured to, and locatedin the interior of, the sectlons 5' and 6 are a series of knife- "sharpen ing'sections 13 to 16 inclusive, each series being shown asformed of four ofthe 6 together and the knife-sharpening sectlons of one 'serles thereof "are staggered relative to the knife-sharpening sections of the other series-thereof, as shown in the drawings; The knife-sharpening sections referred to of each series range from one producing a relative coarse c'u-tto' one which produces a relative finesmoothening cut with the othersjgraduated in between, those [of-the knife-sharpeningsections hearin similar numerals, producing thesame degree of abrading or sharpening action on the kni'fe. By preference the knife-sharpening sections '16-still' finer sharpening stones to producethe desired smoothness'of edge onthe knife, f

The knife-sharpening sections are held in place in the covers Band 6 by engagement at dove-tailedportions 17 thereof with'pairs of inclined flanges 18uformed on the strips .19 secured to the inner faces of the

cover sections

5 and 6 asby soldering them thereto, this feature of the construction permitting the knife-sharpening sections-t0 be readily,

of the

sections

5 and 6 on the

carrying sections

5 and 6. r

- tions 13 would be steels of a character com- 'monly used in *the sharpening of carving "knives, the sections 14 would be relatively coarse sharpening stones, the sections 15 reli 'atively finer sharpening stones, and the secslipped intoand out of the channels provided between the pairs of flanges 18'and when in position thereinbe held firmly 1n the desired position relativeto each other.

It is preferred that the surfaces of the'sec-- tions '14, 15, and 16 with which the knife- "blade contacts in the sharpening'operation, be rounded as shown, to augment the abrad ing or sharpeningnction, and: that the sec tions-13 which preferably extend a slight hand, introduces the knife-blade distance, as for example 1/100 of an inch short of the plane in which the sharpening surfaces of the other sections extend, be

shown in Fig. '3, topresent a channel into which the knife-blade to be sharpened is inserted, it being preferred that some restraining means, as for example the chain illustrated at 20 and connected with studs 21 on the inner ,faces of the

sections

5 and 6, be provided for preventing the sections from swinging-an undue distance apart under the action of the spring 10.- The operator grasping the device with the hinge portion thereof lying in his palm and with the sections 13 extending adjacent the thumb portion of 121s to e sharpened into the channel shownqat 22 in Fig.3 and draws it toward him while maintaining the cutting edge of the blade in engagement with the knife-sharpening sections, it being'preferred that the operator in this drawing operation referred to grad- .ually press'the

sections

5 and 6 toward each other, causing the knife-blade to rise in the channel 22 asitb'ecomes pr'ogressivelv shaL lower. 7

In the use of the device as preferably constructed as above stated, the operator by varying the pressure exerted by him at the end of the case containing the sections 13 may bring these particular sections into and out of position for contacting with the knife-blade by reason of the flexibility of the case and thus may sharpen theblade on all of the sections, or only those other than the sections 13, asdesirec.

It will be noted thatthe portions of the knife-blade will be first acted on by therelatively coarse sharpening sections 13 when. in position to act on the knife, thence bythe next finer sections 1% and so on throughout the series and thus the 'knife will be sharpened very effectually, causing it to present the desired finished edge.

When the device is out of use, theope a tor closes the

sections

5 and 6 together and fastens them in this position by the snapfastener :23 on the section 6 engaging a I hook 24 on the section 5 To remove the sharpenin sections the operator withdraws vthe pins permitting the

sections

5 and 6 to be removed and then slides the sharpening sections out of the grooves containing them.

What I claim as new and desire to secure by Letters Patent is" I 1. In a knife-sharpener, the combination of a plurality of series of knife-sharpening surfaces arranged staggered relation and presenting a -V:shaped channel intowhich the -knife:-blade to be sharpened is inserted for contacting sai'dsur faces, the surfaces of said series being graduated from a relatlvely coarse sharpening surface to a relatively fine sharpening surface, whereby as r a knife-blade is drawn through said channel its cutting edge port-ion is progressively acted upon by the graduated knife-sharpening sin'fa'ces, first producing coarse sharpen ing and finally relatively fine sharpening.

A lmife-sharpener comprising a casing formed of hingedly-connected sections, a plurality of series of knife-sharpening ,surfaces in said casing arranged in staggered relation "i-th said surfaces angularly disposed relative to the of said hinge and presenting a -V-shaped channel into which the knife-blade to be sharpened is inserted for contacting said surfaces,- said casing being open along one side for removal and replacement of said surfaces therethrough, and a closure for said open side of the casing. I i r 3. A knifesharpener comprising a casing formed of hingedly connected sections, spring means tending to swing said sections apart, a plurality of series of lo life-sharpenlng surfaces in said casing arranged in staggered relation withsaid surfaces angulerly disposed relative to the axes of said hinge and presenting av V-shaped channel into which the knife-blade to be sl-iarpenedis 1nstarted for contacting said surfaces, said casformed of hingedl'y-connected sections,

spring means tending to swing said sections apart, a plurallty of series of knife-sharpenin surfaces arran ed in sta ered relation (3 V 0 ba s withsaid surfacesengularly disposed rela' tive to theaxes of said hinge and presenting a V-shaped channel into which the knifebla'de to be-sh'arpene'd is inserted for contacting said surfaces, said casing being open along one side for removal and. replacement of said surfaces therethrough, a closure for the open side of said casing, and releasable means engaging said closurefor holdmgtheparts of said casing including said closure, inclosed position against the action of said spring means.

5. A knife-sharpener comprising a casing formed of hingedly-connected sections, a plurality of series of knifesharpening surfaces in said casing arranged in staggered relation with said surfaces angularly dispos'edrela'tive to the axes of said hinge and presenting. a V-shaped channel into which the knife-blade to be sharpened is inserted for contacting said surfaces, said casing being open along onesi'de for removal and re-.

placement of said surfaces therethrough,

and a closure for said open side of the casing formed of sections and means for releasably securing said sections to said hingedlyconnected sections.

6. In a knife-sharpener, the combination of a plurality of series of knife-sharpening surfaces arranged in staggered relation and presenting a V-shaped channel into which the knife-blade to be sharpened is inserted for contacting said surfaces, said surfaces at the portions thereof contacted by the knife being of curved contour, the surfaces of said series being graduated from a relatively coarse sharpenin surface'to a relatively fine sharpening sur ace, whereby as a knifeblade is drawn through said channel its cutting edge portion is progressively acted upon by the graduated knife-sharpening surfaces, first producing coarse'sharpening and finally relatively fine sharpening.

7. In a knife-sharpener, the combination of a plurality of series of knife-sharpening surfaces arranged in staggered relation and presenting a V-shaped channel into which the knife-blade to be sharpened is inserted for contacting said surfaces, the surfaces of said series being graduated from a relatively coarse sharpening surface to a relatively fine sharpening surface, and means supporting said surfaces, the coarsest of said surfaces being inset from a plane in which the remainder of said surfaces extend, said means supporting said surfaces being constructed and arranged as to permit the operator at will to extend said coarse surfaces into ositionfor engaging with the blade as it is drawn through said channel;

8. In a knife-sharpener, the combination I I said series being graduated from a relatively coarse sharpening surfaceto a relatively fine sharpenmg surface, and means supporting said surfaces, the coarsest of said surfaces a being inset from the plane in which the remainder of said surfaces extend, said means supporting said surfaces being constructed and arranged as to permit the operator at willto extend said coarse surfaces into posi: tion for engaging with the-blade as it is drawn through saidchannel, and the portions of said coarse sharpening surfaces adjacent the knife-blade being flat.

9. In a knife-sharpener, the combination of a casing formed of hingedly-connected sections and knife-sharpening members on said casing-sections arranged in staggered relationand presentmg a V-shaped channel,- when said casing is open into which the knife to be sharpened is inserted for con- I tactin said sharpening members, means carrle b said sections to normally hold the same 111 open posltlon, sald casing forming a complete housin for said members.

enonon MAURER,