US1969611A - Blade sharpening device - Google Patents

Description

1934- A. JESSEN 1,969,611

BLADE SHARPENING DEVICE Filed Nov. 17, 1933 2 Sheets-Sheet l Inventor Z .14. tfessen /I Home y Aug. 7, 1934 A, JESSEN BLADE SHARPENING DEVICE Filed Nov. 1'7, 1933 2 Sheets-Sheet 2 Patented Aug. 7, I934 i ssasnl- 'VBLADE sHaRrENindiEvmE Leslie A; Jessen, Sycamoreplll. I Application November 17, 1 933, "iS erial N o.'fil 8,533

1 Claim; (Cl. 1-20 5 This invention relates to an improved blade sharpening device possessing diversified structural characteristics coordinated to .provide a unique implement susceptible of practicaluse Bi in sharpening blades of tools and articles of cutlery, particularly household accessories, such as scissors, kitchen knives and the like.

In carrying the principles of the basic idea into actual practice, I have evolved and produced a simple and economical device comprising an abradant element holder or clip carried by a manually manipulated actuator'including a blade backing and guiding plate and a conveniently associated finger grip.

Generically stated, I have invented and perfected a plurality of forms of the invention in which the aforesaid characteristics will be found to be common and wherein each form or embodiment of the invention possesses certain struc- .20 tural refinements and features best adapted to cooperate with predeterminedtypes of cutting blades, such as the blades of scissors, knives, wood-working tools and the like.

In the accompanying drawings wherein like numerals are employed to designate like part throughout the views:-

Figure .1 is a perspective view of one embodiment of the invention showing the manner in which it is adjusted for use in sharpening the blade of a conventional kitchen knife. t Figure 2 is a perspective view of the same device showing the manner in'which it is arranged or adjusted for sharpening the beveled cutting edge of the blade of a pair of conventional scissors.

Figures 3, 4 and 5 constitute a group perspective view of the parts of the device shownin Figures 1 and 2, said. parts being disconnected.

Figure 6 is a View showing a slightly different embodiment of the invention wherein the abradant block clip or holder is rigid or fixed.

Figures 7 and 8 are detail perspective views of the assembly shown in Figure 6.

Figure 9 is a perspective view of a still further embodiment of the invention, showing the manoftlie deviceshown inFigures l to 5 inclusive. Referring especially to Figures 3 and 4, it .will be observed that this device. or form of the in vention is. made up essentiallyof two companion parts 12 and. 13 respectively. -The part'12 may lee-described as .the' movable actuator, this being the formxof a. sheet: metal =unitformed from a single stamping of metalbent upon itself to define a substantially rectangular blade backing 1 and ,guidingplate .14 and a centralizedrightangular'lydisposed fingerigrip 15. The features 14 and 15 are: united by bending the metal upon itself,fias indicated at 16.."The upper edge :of the backing plate is provided with ahinged knuckle 117 to cooperate with complemental knucklesl8 and 19 carried by the part 13.' "This part 13 is in the form of a holding clip for the abrasive block 20. It possesses requisite inherent resiliency to'holdthe block 20. frictidnally but i'cmovably between itsjaws. The upper jawhas through :the thenaligned'knuckles 17, 18 and 19;

Thisuse'rves to 'hinge'dly'conne'ct the block holding clip. 13 to the adaptation actuator or unit 12. The meeting threads between thepin '24 and knuckle 19: permits the clip 13=to be adjusted to an obtuse angularp'osition, as shown: in Fig-'- ure'l,. iorisharpening. the blade B of the knife 25. Or the holder clip 13 can be adjusted to the right angular position shown in Figure 2 and held in this position for sharpening the blade A of thescissors 26. Thus in this embodiment of the invention, we have an actuator unit 12 including a backing plate 14, the finger grip 15, and an abradant block holdingclip 13' hingedly connected to the backing plate Sand adjustable to the desired angular position for) sharpening a predetermined type of blade.

The style or form of the invention illustrated in'Figures 6 and 7 is in the form of a one-piece unit diiferentiated by the numeral -27. The features of this form of the invention are quite similar to those already described; Referring to Figure 7 for example, it will be observed that the numeral 28 designates a guiding andback- "is I ing plate for the blade and 29 an integral rightangularly disposed and properly centralized noted .by the numeral 38.. permanent partof the backing plate and ine finger grip 29. Here the U-shaped clip 30 is formed as an integral part and the free end of the upper jaw provided with an entrance lip '31 and the lower jaw provided with a stop cleat mentary block-like portion of a file can be used, 7

especially for sharpening wood-Working tools.

Coming now to Figures 9 and 10, this em bodiment or form of the inventionis differen tiated by the numeral 34 and possesses common characteristics found in the twoiforms .ofi-the invention already described. Itwill be observed, I

for example, that, the numeral '35 designatesa substantially rectangular backing and guide;

plate having one edge portion bent upon itself, as indicated. at. 36, 'and terminating .in a rightangularly disposed finger grip.or:flange537. The U-shaped. abradant'block holding clip is de- It is formed as a stead of occupying the. rightangular position shown in Figure 7,: ithas asubstantially obtuse angular position fixed to dispose the block in a natural inclined or oblique sharpening position. The numeral 39 designates the ofiset'lipon the upper jaw and. 40 indicates the stop element; Inthis form of the invention, as well as in the form-shown in Figure 1, attention is called to the'numeral 41'which serves to designate an offset part of the. U-shaped holder or clip. This is designed so as to provide aclearance space, such as is indicated at 42 in Figure 9. In other words, this acts as a clearance space for the cutting edgeof the blade .onone side of the blade '5; the U-shaped blockholder, whether the-holder be hingedor rigid.

Inall three forms of the inventiongit is obvious that theabra'dant zblockL is resiliently clamped between the jaws of the U-shaped holder-.or clip. This clip occupies varied angular positions; with respect'xtojthe 'coi-ordinated"ac.-: tuator. unit. The:.actuator unit embodies -a backing plate; and av suitablyarranged finger grip.v Thus by inserting the-block and holding the tool in one hand and grasping. .the :finger grip. between the thumb and fingers of theother hand, the-entire sharpener as-a unit can be reciprocatedback. and. forth in sliding contact a screw threads.

with the blade somewhat as shown in the drawings for the purpose of sharpening the cutting edge of the blade.

The form of the device shown in Figure 1 is especially desirable because of the hinged mounting of the U-shaped clip 13 and the provision of the set screw 23 which serves as a follower to feed the block 20 out of the clip as it be comes worn. This form of the invention is also desirable, due to the coaction of the" screw threads on the hinge screw 24 and the hinge knuckle 19 which permits the clip 13 to be adjusted to the position shown in Figurel or the position shown in Figure 2 or intermediate positionand held in this position by tightening the Figure 7 functions very much in the same manner "as the "arrangement depicted in Figure 2, beingdesirable under certain conditions, due

to the fact that the clip 30 is formed rigidly or iritegrallyxwith-the complemental actuating unit. The same istrue of the arrangement shown in Figures 9 and 10, althoughin neither of. the latter two forms of the invention does the user have the'range of adjustment found in the embodimentshown in Figureil. 11. a It is thought that the'description, taken in connection With the drawings, will enable a clear understanding of the: invention 'to be had. Therefore, a. more lengthy description is thought unnecessary. 1 x a Y .-While. the preferred embodiment of the in-' ventionhas been shown and described, it is to be understood that minor changes comingwithin the field of invention claimed may be resorted to if desired.

- What I c1aim.is: I As a new article of manufacture, an'actuating unit comprising a single. metalstamping bent upon itself to form a backingplate and a rightangularly disposed finger grip for moving the backing plate .backand forth with respect .to the blade to be sharpened, said backing plate being formed on its upper edgewith a hinge pin knuckle, a substantially; U-shapedfi abradant block holding clip, said clip having its lower' jaw formed with hinge knuckles aligned with said first. named knuckle, one of the second named knuckles being screw threaded, a hinge pin passing through said knucklesrand having a threaded end cooperating with the aforesaid screw threads to permit the clip to be adjusted to and held in apredetermined adjusted position with respect to, the backing plate, saidknuckle-equipped jaw being formed with a stop. element, and a set screw carried-by said clip'to aid in holding and adjusting the abradantblock.

. Y LESLIE A..JESSEN.

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