US2351813A - Sharpening device - Google Patents

Description

June 20, 19.44. 1 HQLTZMAN 2,351,813

SHARPENING DEvIcE Filed May 16 1942 4 NVENToR.

' Mue/a' BY Patented June 20, 1944 UNITED] @STATES vPM# ENT OFFICE l 4slmlnnrnrre DEvICE 1 John Holtzman, New York, N. Y., assigner of one; half to Irving F. Goodfriend, New Ybrk, N. Y.

A' Y`application May 16, 1942, serial No. 113,273`

' f4 Claims. (o1. 12o-9o.)

This invention relates toa sharpening device for a tailors crayon or chalk.

My invention: contemplates 'the provision .of

a device by meansof which the .crayon or chalk,J

such as that used by cloth cutters and tailors to mark the. fabric .or clothupon which they operate, may be sharpened to provide the` fine knife-like edge required in such work.y i

Due to the composition of the crayon or chalk, when the edge thereof is shaved and thereby sharpened, the particles of shavings have a tend- .ency'to pack. and adhere to the cutting means such as that heretofore used, necessitating frequent cleaning by the tailoror cutter. My in- .vention contemplates theprovision of a sharpeningvdevice, for such crayon or V,chalk which is self-cleaning andwhich may be sov arranged so that the'shavings may-beaccumulated in-the means supporting or carrying ithe sharpening members -for later disposal therefrom.

My invention still further contemplates the arrangement of such a shaving device having a sharpening means and as a plane-like knife edge. i

arranged and constructedso that it will not` become clogged and thereby rendered inoperative to formon'the -crayon or chalk the sought for knife-like markingedge. Y

Other objects and advantages of my inventionA will be clear from the description which follows and the vdrawing relating thereto, in Which: y L

.Fig. 1 isa top plan view of a: sharpening device according to my invention. s

'Fig-.12. is a section on-theline 2-2of Fig. 1. .Fig r3 isa-.section on the line 3--3 of Fig. 2. Fig. 4 is a vsideelevation of the sharpening memberyassembly. removed from the carrying tray. .Y f f v .l

g Fig. 5 isa perspective view of a conventional crayonv or chalk, which may be sharpened with4 'af-device according tomy invention.

Referringnow t0 .the drawing and particularly to Figs. l to 4 inclusive, thecutter or sharpening member assembly I0 may be, removably carried in the bed I2,;the frame end walls I3 and side walls I5, of which'extend up from the bote.

tom I4 of the tray I6 in the center thereof and in which 'bed the; assembly I0 fits relatively snugly.

The assembly I0 comprises two similar members for carrying the plane-like knives I8, which extend through the slots 20 arranged in the upper inclined portions 22, extending upwardly from the straight lower portion 24 of the assembly member.

oblong rectangular' plate, vthe elongated marking f edges 32 of which'have been sharpened acutexangle, V-shaped in `cross section.'V

'Ihe cutting edges 34 of the knives ISeXtend through the slots 20 beyondthe inner surfaces of the inclined upper portions `22 in to the guide'- way or ,groove 28, a distance sui'icient` to shave or sharpen the edge 32 into section sought orselected. L

The knives I8 aresecured for removal 'therefrom, in the event lit isdesired tofsharpen the cutting edges thereof, to the upperinclined portions `22 byv any suitable means,'preferably for" selective ,positioning inthe device, as bythe screw 36, the threads of-Whichengage the core'4 In order to permit the, cutting edge 34 toV be selectively po..

respondingly rthreaded groove '38.

sitioned in the guideway or groove 28, preferablyv I provide the elongated slot 40 in the body of Vthe knife I8, in which slot the screw 36 passes.` to enable the knife to be secured on the *portionf 22 .iln`thedesired position.

In ordertodene the entrance 42 tothe guide-4: way ork groove 28 so1that-the crayon or chalk 1 30 will be'advanced therein Jin the proper-'diey rection against the cutting edges 34, I prefer- `v ably cutaway the upper portions 22 adjacent the entrancethereto asv indicated at-42. This cutaway part preferably. terminates just in advance of the slot 20 and cutting edge 34 and'` additionally serves to somewhat relieve any rei sistance, frictional or otherwise,` tothe passageI of the crayon or chalk along'lthe guideway or groove, since the knives, by reason' of this, begin-fAV to shave the crayon orchalk'almostimmediately upon its entrance into that part vof the''guilewaygg4 which is surrounded by the walls forming it.

As the lcrayon or chalk 30 is moved through the guideway or groove 28, the cutting edges 34 of the plane-like knives I8 bite into it to shave off the edges thereof. Since the guideway or groove is V-shaped in cross section and the cutting edges of the sharpening means thereinto an the angular crossv j by correspondingly inclined, an angular knifelike marking edge is formed on the crayon or Chalk.

The cuttings or shavings are directed by the preferably beveled knife edge 34 through the slot 20 to accumulate on each side of the cutter assembly bed l2 in the interior or chamber 44, formed by the upstanding end walls 46 and side walls 48 of the tray VIii.Y It willbe apparent that by reason of this construction just described, the sharpening device is substantially self-cleaning, since the shavings or cuttings will necessarily fall through the slots away from the cutting edges and provision being made for the accumulation of the cuttings or shavings, as they are made, in a tray or support in whichthe sharpening member is carried.

Since the cutter assembly l is snugly but removably carried in the bed l2 of the tray I6, it will be recognized that the sharpening device may beused as.` a separate implement, if so desired.

While I' have illustrated and described a-certain embodiment ofv myr invention,.I do not intend to be limited to the specific details; of construction shown, but intend to. claim myinvention as:broad1y.v as. the priorartl and .thelscope of the appended'claims permit. f

I claim:

1. In a sharpening device for a. tailors crayon or chalk of a relatively oblongshape and having an elongated beveled V-shapedin cross-section marking. edge; a trayA for: catching and accumulating therein shavings from the crayon as it is sharpenedby the device, spaced? walls extending upirom the bottom oithe. tray toy form a bed for gdetachably .carryingA a crayon or chalk Sharpener in position in thetray; and acrayon or chalk. Sharpener comprising two similar members, each member having a lower portion and an upper portion extending therefrom at an arigle thereto,l said lower portions. secured' together to form arbaselcorresponding-in. shape to the bed to be; snugly' fitted-therein, said upper portions forming a. V-shapedguideway for moving the crayon or chalk therethrough togsharpen av V- shaped. edgel thereon, said upperh portions eachhaving an opening therein anda boss vfor carrying a Sharpener blade extending therefrom on each upper `portion at. the rear of" the opening onzfthe: outside. of the guideway: and at an angle4 to the'lower portion corresponding tothat off the upper' portion. to said lower portion, `said boss`r having a surface inclinedftoward: thefguideway from the rear of the boss to thevrear/edge of the opening;. Sharpener blades each having. a beveled' cutting edge and an elongated slot, andathreaded' means extending through the slot for' securing. a

bladeon thesurfacefof asaid boss with. the bladef cutting edge positioned inthe guideway at the rear edge. of `the opening and `the bevel of thev cutting edge inclined away from the guideway toward'the rear thereof..

2. In a sharpening: deviceA for a tailors., crayon orv chalk of'l a relatively'oblong shape and having a beveled V-shaped" marking edge. comprising two similar members, each memberr having a theicutting edge extending through the opening' lower portionl and an upper portion extending. I

therefrom at an angle thereto, said lower portion secured together to form a supporting base, said upper portions forming a V-shaped guideway for moving the crayon or chalk therethrough to sharpen a V-shaped edge thereon, said upper portions each having an opening therein and a boss for carrying a Sharpener blade extending therefrom on each upper portion at the rear of the opening on the outside of the guideway and at an angle to the lower portion corresponding to that of the upper portion to said lower portion, said boss having a surface inclined toward the guideway from the rear of the boss to the rear edge of the opening; Sharpener blades each having a beveled cutting edge and an elongated slot, and threaded means extending through the slot for securing a blade on the surface of a said boss with the blade cuttion guideway for moving a crayon or chalk therethrough to sharpena V shaped'in crosssection marking edgethereon, eachl of said' upper portions having an opening therein, a bossl forl carrying a-sharpener blade extending therefrom ony each upper portion at the rear of the opening onftheoutside ofthe guideway andhaving an inclined surface from the rear off the boss tothe rear edge of the opening and asharpener blade secured to the inclined surfaceof eachV boss with into the guideway at therear of the opening and the bevel of the cutting edgefinclined away; from the guideway toward the rearA thereof.

"4. In a sharpening device for a tailors marking crayon or chalk of aV-relativel'y oblong shape and; having a substantially v-shaped in cross section marking edge, comprising two similar members each member having a lowerpo'rtion and an upper portion extending therefrom 'at an angle thereto, threaded means securing said-lower portions together to form va supporting base',

saidA upper portions` constituting a V-shaped guideway forV moving a crayonv or chalktherethrough to sharpen a V-shaped` marking -edge thereon, each` of said upper portions having an opening therein, a support for carrying thereon asharpener blade, said support extending from the opening on each upper portion at the rear of the opening onthe` outside of the guideway at an angle thereto from the rear of the support tothe rear edge of the opening and a sharpener .blade secured to the boss` with the cutting edge extending through the opening into the guideway at'the rear of the opening.

JOHN' HOLTZMAN'.

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