US2504423A - Sharpener for shears - Google Patents

Description

April 18, 1950 M. H. JOHNSON ETAL SHARPENER FOR ARS 2 Sheet t 1 Filed July 8, 1946 Q W W m fiJo n 7 Ain-il 18, 1950 M. H. JOHNSON ETAL SHARPENER FOR SHEARS Filed July 18, 1946 2 Sheets-Sheet 2 v w v Mn w wvv/tvmm Www W m w 3 M 1m mu \\\\i w Patented Apr. 18, 1950 UN..I.,.TE1D: OFFICE-i FORSHE'A'RS" Merrill- Ii .Ioh-nsorrasiulfwinfield HuJohnsoma, Moravia-Iowa.-

Applicatibn J 137"18? 1946"; Serial No; 6845486" (Claire-695);

2 Claims: 1;.

This invention relates 1301a,? sharpenerflor shears? and itis primarily anuobjectaofitheriinvention-tcri provide: a device of this kind wherein, duringa a2. working operation, is eliminated all vibratibm; end play and back lash-z.

Furthermore, it-isa a particular object" of thee invention to: provide 'an': apparatus ofi this kind? which can be operated with equal facility to sh'arpen. a p1ain or corrugated; edge." and; to? be employed: in connection:with.varying?heveis':and; with shears of diiferingsizes;

A still further." object I of. the invention: to:- provide a, device of this kind providediwithmeansi' for effectively holding shears in a mannento pern'iit. efi'ective: use of r ant-oil. stonesor aacorrugating me.

The invention. consists inv the; details. of; con struction. and in. the-combination andl arrangement of: theuseveraia' partsxofiour' improved sharpener for shears whereby.- certain important-ad; vantages are attained; as will behereina'fter m'orei fully setfmth".v

In order thatiourinvention mayabebettenurr derstood, weiwillnowi proceed to describeifthe same: withreferenceato the-accompanying draw ings; wherein":

Figure. 1 is a view in sideelevation of Tet-sharp ener constructed in: accordance with anembodi merit of the invention;

Figure 2: is a seetional view -taken substan-tiallva on the line 2 --2, looking inthe direction-of the:

arrows;

Figure 3 is a view in top"p1an-of 'Figur-e 1;

Figure: 4'1 is: a sectional viewsubstantially on the: line. 5-4,. ofFigure 3;. looking in the directtionorthearrows;

Figure 5 i'sLa; sectionatriew on line of Figure. 4;. lookingiin the direction of: the arrows;

Figure :fi is a sectional view taken substanti'tlii: on the line fi -5; of Figure- 1", in the dire'cti'onofi the arrowsy Figure '7 is a fragment'ary 'view partlyin eie vation' and" partly in section, i11i'1strat'ing another: embodiment of." the invention;

Figure 8' is a secti'cmaFview onxline -e- -tg of Figurefl, in" the-direction ofthe' 'arrows'ii and Figure 9 is" fragmentary longitudinal.- sec-*- tionai view'takenat substantiallyth'e transverse center ofFigure-B.

In the embodiment of the -invention -asdis closed in" the-accompanying"drawings; i denote an elongated -and substantiallyrectangular plate of" desired dimensions and provided with" the openihgs=2= whereby; ifdesiredi thesameimay 2% or. other? support byscrews or other: suitable? means. The forward end portion of the'd base plate I15: atia; desired point inwardiy of- "saidI-forward end is providedwith the transversely spaced depending? 1ugs-3 which provide stops': to butt am edge? of the: support to i which. the: device is: applied althoughcithisi is not es'sentiala':

The: rear'portion ofthe base piate= li'at aside margin. thereof is 1 provided with' an': upstanding: web t of; material height: andwhich is providedi with: an elongated slot: 5: sub'stantiall'y at right: angles" to: the: top face i-of the base-plate: 1 111+- sertihieithrough this slot v 5: is a; threaded shank: 6, the inner portion of which carries a fixed head. or? en1areement 1-for contact. with 'the' innerface V of therweb t 'and threading. upon the outer: end? portionof the 'shankt is' a holdingi or clampingz' nut- 8:hereindisclosed as of-a winge'd 'type'.

Theiextremity of the sh'ankifiinwardly of the web? 4? is.=iprovided' 'with a;. substantially sphericai headxfi: which. is'xreadilyf insertibl'e through an: opening l O providedi ini an end' portion of a sieeve': Engaging: the inserted head 9" isthe con caveia'ceof: an .outwardly:spring presse'di jaw 12 within inner portion; of; the sleeve and 00- acting; W ithdthe outer 'side ofithe applied; head S is a convex jaw face at the inner end Ofthplhgsf i sthreadin'gawithin: the outer end of the: sleeve l-l i'. By: thisa-meansthe sleeve It is free for upand: down swinging movement upon-the head 95 and alsohasuniversal m'ovement with-respect thereto within certain limitations.

Tfie cl'osure' for the c1osed end of the sleeve 1 l herein comprises an inserted endportion of" an' eiongated' rod'" IBwhich has" free telescopic en--- gagement within anelongated-tubultrr member'- i 6 01 I Twhicli; inthe present embodiment of theinvention; are adapted"to=be-independent1yused; Themember l 6 hasoperative1y engaged with one end portion thereof a conventional -h'andle or hand grasp l 8'wiii1e the member H is similarly provided with a handle orhand'grasp it:

The member lfi is'adapted' to he employed in' conneetion with an elongated fiat file i brovidedf at one extremity'with a conventional tang" 20f which is adaptedi to be tightly received Witfiifla; sachet 2T- provid'ed in thei'imerend face of the riandie-or.hand grasp I82 The fileF isal'so pref erabiy of' such dimensions as' to; extend to sub-'3- st'anti'alliw the outer" end-"of the-member'- '6' when? in working position.

'rhe member l'Th'as swiveledconnection; as' 'at 2.2% its 'l'iaindle or' hand grasp IB and demoed? asat 23% 01*"0tfi'6IfWiSGri2idlY Heidi tobe effectively'securedto the ton suriacet of a sheif were-memes extending-a major-distancetherealong is an open faced holding receptacle R for an ofl stone S or equivalent abrading element. The holding receptacle R has its outer face open and includes the marginal flanges 24. Threading through one of the end flanges 24 for holding engagement with an applied stone S or its equivalent is a binding screw 25.

The extremity of the base plate l remote from the upstanding web and extending transversely thereacross is an upstanding jaw plate 26, the upper portion of which is forwardly and outwardly curved, as at a, while the top edge 12, which is substantially sharp, has a longitudinal arch or how. The central portion of the plate 26 is provided with an opening 2! through which is freely inserti- Me a bolt shank 28 provided at one extremity with a head 29 for contact with the rear face of the plate 26 andalso with the upwardly facing shoulder 30 carried by said rear face of the plate 26 to hold the shank against rotation, said head 29 having a fiat edge face 0 for engagement with said shoulder 30.

- The shank 28 is of material length and is freely disposed through a central opening 3| in a movable jaw plate 32 provided at its rear outer corners with depending lugs 33 contactingirom above with the portion 34 of the base plate I disposed forwardly of the fixed jaw plate 26. This permits the sliding jaw plate 32 to have a slight rocking movement to assure the most efthe upper ends or marginal edges of the plates 26 and 32 to allow the sharpening element carried by either the member l6 or ll to have effective engagement therewith. By selectively adjusting the position of the shank 6 along the slot 5, the

angle of bevel of the action on the cutting edge of the blade of a pair of shears may be predetermined.

It is also to be pointed out that the inner upper marginal edge portion (1 of the plate 32 is longitudinally curved complemental to the longitudinal curvature of the adjacent edge 12 of the plate 26.

In practice, the blade 31 is placed within the recess 36 of the plate 32, with the outer extremity or point of the blade preferably extending about an eighth of an inch beyond a side of the plate 32. The blade is efiectively clamped in such position by requisite tightening of the winged nut N. It is to be stated that the recess 36 provides a blade support.

6 The shank 6 is adjusted along the slot 5 of the web 4 in accordance with the angle of bevel desired. The member 16 is then telescopically engaged with the rod I5 and swung down to bring the file F in contact with the cutting edge of the clamped blade of the shears. If a plain edge is desired, the filing is started from the point of the blade to the left, with a full stroke of the file. However, if a corrugated edge is desired, the file F is placed on the heel of the shears and file to the right.

When it is desired to use the oil stone S or other abrading element, the member ll is telescopically engaged with the rod l5 and in operation the stone S is pushed across the cutting edge of the blade of the shears with reasonable pressure, starting at the heel of the shears, and during the pushing action the stone S is allowed to slide toward the point of the shears. The pushing action should at all times be outward or away from the person while in contact with the blade of the shears. It is also essential that there should be plenty of oil upon the stone S and that such oil should not be heavy.

With the use of the device as herein embodied, the blades of shears may be sharpened with just a few quick strokes, with the assurance of a keen lasting edge, either plain or corrugated, and in a manner which will not injure the shears. The holding of the shears during a working operation is such as to eliminate all vibration, end play and back lash and the curved edges b and d assure effective fitting of various sizes of shears with the desired set.

The plates 26 and 32 constitute a vise for holding a shear and such plates are of such curvature to set the points of the shears so that they Will not pull at the point. When the nut N, on the shank 28 is tightened down, the plates 26 and 32 will pull the point of the shear blade around whereby it is assured the shears will out better on the point and from the point to the heel.

From the foregoing description it is thought to be obvious that a sharpener for shears constructed in accordance with our invention is particularly well adapted for use by reason of the convenience and facility with which it may be assembled and operated.

We claim:

1. A device of the class described comprising a long base member, a flat upstanding web carried by said member at one longitudinal edge and in a plane parallel with said edge, said web having a vertical slot substantially at right angles to the base member, a shank disposed through the slot, means for selectively holding the shank intermediate the ends of the slot, an elongated memher, a substantially universal connection between the elongated member and the inner end of the shank whereby said long elongated member extends across the inner face of the web, a second elongated member carried by and slidable along the first member, an abrading element carried by the second elongated member, and means for supporting the blade upon the base member on a line perpendicular to the plane of the web for engagement by the abrading element carried by the second elongated member.

2. A device for sharpening a cutting blade, comprising a relatively long base plate, a fixed jaw member rigid with the base plate and standing vertically thereon adjacent to one end thereof, the jaw plate having a tapered top edge forming a clamping edge, a movable jaw plate mounted upon the base plate for rocking movement relative to the fixed jaw plate and having a top edge for coaction with the tapered edge of the fixed jaw plate, means carried upon the jaw face of the movable jaw plate-forming a support for a cutting blade, said support being disposed at an inclination to the horizontal across the face of the movable jaw plate, an upstanding web extending lengthwise of one side of and carried by the base plate adjacent to the rear thereof, a ball carry- 75 the shank, a rod carried by the socket member,

5 a tubular member slidably receiving the rod and carrying a handle at its outer end, and an abrading element secured longitudinally of and to the tubular member to extend across the opposing edges of the jaw plates.

MERRILL H. JOHNSON. WINFIELD H. JOHNSON.

REFERENCES CITED The following references are of record in the file of this patent:

Number UNITED STATES PATENTS

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