US1114634A - Knife and scissors grinder. - Google Patents

Description

0. L. NEISLER.

KNIFE AND SGISSOES GRINDER. APPLICATION FILED MAR. 7, 1913.

2 SHEETS-SHEET 1.

1% C1 away flwfmzb w Patented Oct. 20, 1914.

0. L. NEISLBR.

KNIFE AND SGISSORS GRINDER. APPLICATION FILED MAR. 7, 1913.

1,1 14,634. Patented 001:. 20, 1914.

2 SHEETS-SHEET 2.

OSCAR L. NEISLER, OF CHICAGO, ILIi'lINOIS.

KNIFE AND SCISSORS GRINDER.

Specification of Letters Patent.

Application filed March 7, 1913.

. Patented Oct. 20, 1914.

Serial No. 752,559.

To all whom it may concern:

Be it known that I, OSCAR L. NEIsLER, citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have, invented certain new and use ful Improvements in Knife and Scissors Grinders; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention has for its object to provide a simple and eflicient device for use-in the shop and household for sharpening scissors, knives and the like, and consists in the features of construction and combinations of parts hereinafter fully described and particularly claimed.

In the accompanying drawings illustrating my invention: Figure -1- is a View in side elevation of a device embodying my invention showing the same mounted upon a table, or the like, shown in section. Fig.

2- is a top plan view of the same. Fig.

3 is a view similar to Fig -1- showing one part of the deviceremoved to adapt it to scissors grinding. Fig. -4 is an end elevation of the device. Fig. 5 is a fragmentary detail vertical longitudinal section of the same on the line 55 of Fig. 4. Fig. 43 is a fragmentary detail sectional view on the line 66 of Fig.'3 showing the means for securing the grinding stone used in the device. Fig. 7- is a fragmen tary detail perspective view of a removable member used in the device for engaging a knife blade therein in position to be ground.

Myinvention has for its particular object to provide a grinding device for knives, scissore and other tools which is verysimple and will enable unskilled persons tosharpen tools I 4 of various kinds with ease and without'varyedges .of such tool.

ing the shape or relative A further object of the invention is to provide a tool of the character set forth which occupies; small space and can be readily taken apart'w'hen notrequired and easily 'rea.ssemb]ed for use. 1

to receive and firmly hold} the tool 'to be The device om rises a member adapted i"sharpe'ned and a-grinding'fmembe'r adjust- .-ab ly and mov ably; engaged withsaid 112001 holding member.

In the accompanymg drawings I have illustrated an embodiment of the invention angularity of the adapting it for sharpening scissors and knives. This embodiment is best adapted for the ordinary uses of the household and certain classes of shops and may be readily modified to adapt the same to sharpening' other tools, such as chisels, planes, draw knives, spoke shaves, sicklcs, scythes, etc., without departing from the invention.

In the embodiment shown in the accompanying drawings the supporting member for the tool to be sharpened comprises the U-shaped member 1, the arm 2 of which is provided with a projection 3 in which a set screw 4 has threaded engagement. The other arm 5 of said member constitutes the fixed jaw of a clamping member which will be hereinafter more fully described. The middle portion of the arm 1 is provided with a longitudinal recess 6 between its ends so that when resting on a surface, such as the top of the table 7 it is supported only contiguous to its ends.

Projecting from the lower end of the member 1 below the aw 5 thereof is an arm 8 having a projection 9 extending parallel with thetmiddle portion of the table 1 and in which a set screw 10 has threaded engagement, the latter being adapted to engage the lower face of the table 7 at a point between the ends of the recess 6 in said member 1 whereby the end portions of said member 1 contiguous to the arms 2 and 5 will be brought to bear firmly upon the top of said table 7, as will be obvious. The said arm 8 and its projection 9 are providedwith a whichthe set screw 14 is engaged. The latter passes freely through an openingin the jaw :12, which is engaged by thehead 15 "of'the said set screw,- in' an obvious manner, to. cause said jaw 12 tojj'be swung, lnto'engagement with the armor jaw 5 as thesaid set screw 14 is turned in-one direction. The upper end portion. ofthe said arm or jaw 5 is laterally enlarged, thatis, itis wider" than the lower end thereof. The upper face 16 of said arin or jaw 5 is beveledor inclined. A recess 17 is provided in the upper end portion of the face of said arm or jaw 5 opposing the free end portion of the jaw 12. The wall of said recess 17 opposing the free end portion of the jaw 12 is also slightly beveled or inclined while the lower wallthereof affords a support for the scissors blade to be sharpened.

In Fig. -3 I have shown a scissors blade mounted in the recess 17 so that the face thereof which opposes the companion scissors blade lies in contact with the inclined face of said recess and the edge thereof to be sharpened projects above the upper face of the arm or jaw 5. The said scissors blade is held in place in said recess by pressure exerted thereon by the edge flange 12 of the jaw 12 in an obvious manner. The set screw 4 mounted in the threaded opening in the projection 3 of the arm 2 is provided with a flat head 18 in which is an elongated opening 19 through which the stem 20 of a grinding stone holder 21 projects, the said stem being free to be reciprocated in said opening and to oscillate therein as will be obvious. The grindstone holder 21 disposed at the end of said stem comprises a member having two arms 22' between which the grindstone 23 is adapted to be received, the opposed faces of said arms 22 being substantially parallel and the outer faces thereof inclined so that said arms are of greater thickness at their outer than at their inner ends. A. rectangular sleeve having asquare opening corresponding substantially in size with the crosssectional area of the grindstone 23, and which is provided in two of its diametrically opposed walls with recesses adapted to receive the arms 22, is mounted upon the latter and by being moved forcibly toward the outer ends thereof forces the same toward each other thereby firmly engaging the grindstone 23 therebetween and holding the same substantally rigidly engaged therein. By removing the stem 20 from said "opening 19 the screw 4 may be turned to raise or lower the head 18 so as to bring the plane of the grinding face of the stone 23 into the plane of the scissors blade edge which is to be ground. After such adjustment has been effected the operator replaces the stem 20 in the opening 19 and by then grasping the stone 23 with the fingers gives the same a reciprocating motion over the scissors blade edge from end to end and laterally thereof thereby obviously grinding the same. 4

In order to adapt the device to the grinding. of knives the clamp for engaging the knife blade must be capable of coacting with the upper inclined face of the said arm or aw 5. To accomplish this an additional member 24 is inserted between the jaw 5 and thejaw 12, as shown in Figs. 1,-

4' and 5, said Igembe'r being shown in detail in Fig. This member comprises'a body portion having a bifurcated lower end provided with two arms 25 each of which is provided with a projection 26 extending substantially transversely thereto. The said projections 26 are adapted to engage the shoulders 27 at the lower ends of the upper and wider portion of the jaw 5. At the-upper end of said member 24 is a flange 28 which is adapted to overhang the upper face of the jaw 5. That portion 29 of said member 24 lying between the body portion thereof and said flange 28 is inclined and is adapted to be engaged by the free end portion 12* of the jaw 12 which is adapted to exert pressure thereon to depress the flange 28. The said flange 12 is provided with a recess 30 in which the projection 31 on said inclined portion 29 is adapted to be received.

.In use the knife blade 32 rests upon the upper inclined face of the jaw 5 and is clamped down upon the same by the free end portion of the flange 28 as the latter is crowded forward to overhang said inclined face by movement of said jaw 12, that is to say, the said member 24 turns upon the projecting shoulders 27 as a fulcrum and during its movement about this fulcrum the distance between the free end portion of the flange 28 and the upper face of the jaw 5 becomes constantly less thus effecting the clamping of said knife blade 32, as described. The grinding stone 23 is now adjusted in position by manipulating the set-screw 4 previously described, to bring the grinding face of said stone into the plane of one of the beveled edges of the knife blade terminating in the cutting edge thereof and by then imparting movement to the grinding stone in the same manner as in sharpening scissor blades, said beveled face will obviously be ground truly and accurately. By

then reversing the position of the knife blade to bring the other edge uppermost the latter may also be ground and the sharpening of the knife thus completed.

I claim 'as my invention: 1. In a grinding tool, a vise for engaging an object to maintain the surface thereof to be ground in a predetermined plane, said Vise comprising a pair. of relatively movable jaws, manually operable means for moving the said jaws toward each other, and an auxiliary member interposed between the said iaws and equipped with a flange overhanging one of the said jaws, the said manually operable means coacting with the said relatively movable jaws and the said auxiliary member to clamp the said object between the said flange and the jaw overhung thereby.

2..In a grindingtooL'a vise for engaging an object to maintain the surface thereof to be ground in a predetemined'pIane, said vise comprising a pair of relatively movable jaws, manually operable means for moving the said jaws toward each other, and an auxiliary member interposed between the said jaws and equipped with a flange overhanging one of the said jaws, the said manually operable means enacting with the said relatively movable jaws and the said auxiliary member to clamp the said object between the said flange and the jaw overhung thereby; the said auxiliary member equipped with bifurcated ends underhanging the ends of the said last-named jaw, the said disposition of the ends of the auxiliary member and the last-named jaw affording asubstantially pivotal mounting'for the said auxiliary member.

3. Ina grinding tool, a vise for engaging an object to maintain the surface thereof to be ground in a predetermined plane, said vise having a rigid jaw and a movable jawv and said rigid jaw provided with surfaces disposed angular-1y relatively to each and against either of which the object to be ground is adapted to be clamped to determine its position, one of said surfaces opposlng the movable jaw, and a member adapted to be removab-ly disposed between said jaws and having a partopposing and adapted to be moved to approach the other of said surfaces to clamp the object upon the same. a

In testimony whereof I have signed my name in presence of two subscribing witnesses.

e OSCAR L. NEISLER.

- Witnesses: I M. M. BOYLE,

E. H. MAODOWELL.

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