US1591812A - Sharpening device - Google Patents

Description

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Patented July 6, 1926.

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RALPHI. ELLIOTT AND CARL E. LICHENS, OF BERKELEY, CALIFORNIA; SAID LICHENS ASSIGNOR, BY DIRECT AND MESNE ASSIGNMENTS, OF HIS ENTIRE RIGHT TO ED- WARD J. GINOCHIO, OF OAKLAND, CALIFORNIA.

SHARPEN'ING DEVICE.

Application filed February 9, 1925. Serial No. 7,964.

Our invention is in a sharpening device for different types of cutlery, particularly for sharpening shears. The particular feature ofthe invention has to do with a simple way of changing the bevel. In shears the bevel is flatter-near their pivot than at the point, and with the old type of shear sharpener it was inconvenient to obtain the proper bevel. Our improvement is shown in a specific adaptation to the swiveling bar type of sharpener in which the swiveling bar may also be given a longitudinal'reciprocation, the cutting surface such as a file, or stone, being situated at the handle end ofthe implement.

Our invention will be more clearly understood from the specification and drawings in which: I

Figure 1 is a plan view of the assembled device. a

Figure 2 is a side elevation of Figure 1 in the direction of the arrow 2.

Figure 3 is a detail side elevation showing our specific clamping yoke for forming a bevel, holding the tool in a position to cut a coarse bevel.

' Figure 4 is a view similar to Figure 3 with the pivoted bearing plateswiveled up wardly in a position to cut a sharp bevel.

, Figure 5 is an endelevation of the perforated guide plate in the direction of the arrow 5 in Figure 1.

Fi ure 6 is a section on the line 6-6, of Fig. F in the direction of the arrows.

Figure 7 is a front elevation of Figure 6 illustrating in conjunction therewith a main ner of holding the bearing plate and file I to allow a manuallycontrolled up and down oscillating movement to give a changing bevel, as required for shear blades and the like.

In the drawings the base 1 is preferably formed '1' shaped with a shank 2 and cross piece 3, a perforated guide plate 4 extends upwardly from the rear end of the shank, and the. clamping bracket 5 is sloped from the end oft-he cross piece 3, suitable apertures 6 being left in the cross piece for bolting to a work table. bracket preferably extends the entire width of the cross piece 3, and has a co-acting clamp 7 operated by a screw threaded bolt 8' formed integral therewith, extending through an aperture 9 in the bracket. A

The clamping wing nut 10 bears on the flat surface 11 of the lug 12 formed integral with the clamping bracket. The work 18 shown as a blade to be sharpened is clamped between the clamping bracket and the co-acting clamp 7, and thus by means of the wing nut 10 held fiunly in position.

The guide plate 4 has a series of perforations 17 at different elevations in the plate, and these perforations have rounded corners 18. A bar 19 extends through these perforations, and has a nut 20 at one end to limit its movement, and at the other end carries a yoke 21, with upper and lower arms 22 and 23. In the base 24 of the yoke a bearing plate 25 is pivoted by the pin 26 extending through an aperture in the base 24. A supporting screw 26 extends through the arm 23, and a clamp screw 27 through the arm 22. These have any suitable means for turning such as the screw driver slot 28 in the screw 26, and the wing head 29 on the screw 2?. A file 80 is clamped between the bearing plate and the clamp screw 27 and preferably has a handle 31. A sharpening stone may be substituted for the file.

The manner of operation of our sharpening device is as follows: If a constant bevel is required the implement would be set up to give the proper angle of cut on the blade 13 which may be the angle shown in Figs. 2, 3 and 4, or any other desired angle. The angle of cut may also be altered by inserting the bar 19 through different perforations 17. The file is then pressed down and recip rocated lengthwise 'of the blade until the blade is sharpened. It may also be given a longitudinally reciprocating motion by shoving it in and out with the bar passing through apertures 17, or a combined swinging and reciprocating movement may be given it, to produce a uniform bevel along the edge of the blade. It will be noted that the rounded corners 18 of the apertures 1'? allow the bar 19 to pivot therein.

For sharpening shears the file may be set first as shown in Fig. 8 and operated on the blade adjacent its pivot to give a flat bevel. The whole blade may be beveled at the same angle and later the outer part given a sharper bevel as shown in Figs. 2 and 4 by swinging the bearing plate 25 upwardly, and thus clamping the file in a different position in relation to the work. An alternative manner of sharpening the shear would be to term the tint bevel near the pivot, as sho n in Fig. 3, sharpen a small portion and as the file is worked towards the point of the shear gradually change the position by swinging the be: ng plate 2 upwardly through operation or the screw 2 and the clamp screw 27. The end oi th ill!) bearing against the base. 2-1 )i the yolte. iv sullicient cross bearing to prevent the i from turning" about the screw: as a pivot.

Our invention may be considerably moditied to suit special circumstances or to operate on diti'erent types oi blades without departing from the spirit thereol.

Referring )articularly to Figures (3 and T, the bar it) supports a yolte 212 similar to the yolte 21. except that it has side laces 33 as well as the arms The bearand -o ing plate 25 is shown pivoted in the center on a journal 3t having screw threaded ends 35 with washers St nut ST and locl; nut 38 thereon. Through the arms there are threaded screws 26 and 2? similar to those of the construction in Fi 2, 3 and t.

The file 30 is plac d on the bearing plate and pressed downwardly thereon by a spring 3?) bearing on plate it) on top of the tile. A spring ll presses up 'ardly from the lower arm on the base of the bearing plate t necessary the tile is wedged between the faces 33 y shims 41 of wood or other suitable material. The screws 2(3 and 97 are preterably threaded into the arms so as not to contact with the bearing plate or the tile, it a graduated bevel desired.

The manner of operation is as follows: The nuts 87 and loci: nut 38 would be clamped sufficiently tightly so that the bearing plate would have a stifi' oscillatingmotion. The springs 39 and -11 securely hold the file and bearing plate in contact. The handle ot the file is grasped and swung from side to side, drawing the file over the blade being operated on. Presuming this to be a blade ot a shears, which at the base has a coarse bevel as shown in Figure 3, and at the points a sharp bevel as shown in Figure 4-, the hand would be given such a motion as to not only swing the tile irom side to side but oscillate it up and down through the positions illustrated in Figures 3, 2 and t. The springs will follow the motion of the bearingplate and file holding the tile tightly in position, and with or without the aid of the clamp nuts 37 and 38 restrain the movement so that the hand may give a graduated motion across and up and down in relation to the blade being sharpened.

The operation requires a certain amount of mechanical skill which is easily acquired as the stroke of the hand is a straight line motion from a lower position at one side of the device to an upper position at the opposite side as illustrated in Figure 4, and it is only necessary to move the hand backwards and "forwards in substantially the same line for a few times until the blade is sharpened with the proper graduated bevel.

The construction oi the graduated bevclstill so the liiilltl will have better control over the changing bevels as illustrated in Figures 2, 3 and l-.

Having described our invention, we claim:

't. it sharpeni device comprising a n frame, a bar pivot-lily mounted therein, and

an al;=rading element having one end adjustably secured to the end ot the bar, and its other end lClliUlLC from said bar.

2. A sha anng device comprising a train. a lilli pivotally mounted therein, an

abrading element ha ring one end secured to the end or said bar, and means 'lor adjusting the angle between said bar and said abrading element.

3. A sharpening device comprising, a

"frame, a guide plate secured thereto and irovded with a perforation, a bar mounted in said perforation to pivot and reciprocate therein, and an abrading elen'ient secured to said bar.

l. )1 sharpeningdevice comprising a bar. a guide plate having a perforation adapted to receive said bar "for pivotal and reciproeating movement therein, an abrading elcment secured to said bar, and means to adjust the relation between said bar and said abrading element.

5. A sharpening device comprising in combination a guide plate having ascrics 0t perforations at ditlferent elevations, a clamp tor a blade, a rod extending through the perforations in the guide plate, and an abrading element connected to said rod, and means for adjusting the angle between said rod and said abrading' element.

(3. it sharpening tool as claimed in claim 5, in which the adjustable mounting for the abrading tool comprises a swiveling connection of the abrading tool and the rod such swivelingconnecting being on the end of the rod.

7. In a sharpening device, a single fixed guide plate. apertures in the guide plate at dillerentelevations, and a rod adapted to support an abrading tool said rod being mounted in any one of said apertures.

S. In a sharpening device, single fixed guide plate, apertures in the guide plate at differentelevations. and ditlerent positions laterally, and a rod adapted to support an lilt] abrading tool said rod being mounted in any one of said apertures.

9. In a sharpening device a rod, a fixed yoke on the end of the rod, an adjustable mounting for an abrading tool in the yoke.

10. In a sharpening device a rod, a fixed yoke on the end of the rod, a horizontal support for a blade, anda vertical swivel in the yoke for an abrading tool.

11. In a sharpening device a rod, a yoke on the end of the rod, a bearing plate pivoted in the yoke to swivel in a vertical direction,a bearing screw to support the bearing plate in the desired position, and a clamp screw to clamp an abrading tool to the bearing plate.

12. A. sharpening device comprising in combination a guide plate having a series of perforations at difierent. elevations, a clamp for a blade in substantially a .hori- Zontal position, a rod extending through any one of the perforations in the guide plate, a yoke on the end of the rod, a hearing plate pivoted in the yoke to swivel in a vertical direction, a bearing screw to support the bearing plate in the desired position, and a clamp screw to clamp an abrading tool to the bearin plate.

13. A sharpening cevice comprising in combination, a holder for an abrading tool, a clamp tor a blade, means to allow transverse swivelling of an abrading tool, and means to allow up and down oscillation thereof, said oscillation being up and down relative to the point of swiveling, and the abrading tool swiveling in a vertical plane.

14 A sharpening device comprising a pivotally mounted rod, a fixed yoke secured to the end of said rod, a holder for an abrading tool mounted in said yoke and means to allow said holder to have a free oscillating movement up and down.

15. A sharpening device as claimed in claim 14, in which the means for allowing the oscillating movement comprises springs bearing on the abrading tool.

16. A sharpening device comprising a pivotally mounted rod, a yoke'secured on said rod, side faces on the yoke, a holder pivotally mounted on the side faces, means to hold an abrading tool on thebearing plate and clamp nuts to trictionally retard the oscillation of the bearing plate.

17. A sharpening device as claimed in claim 16, in which the means to hold the abrading tool on the bearing plate comprises a spring bearing on the abrading tool.

18. A sharpening device comprising a pivotally mounted rod, a yoke secured on said rod, a bearingplate pivotally mounted in the yoke, a spring pressing on the surface 01 the bearing plate, and a spring adapted to press on an abrading tool whereby said abrading tool has free oscillating movement to form a graduated bevel.

19. A sharpening device as claimed in claim 18, having in addition screws threaded through the yoke and engaging the bear ing plate and abrading tool whereby the abrading tool will give a fixed bevel.

In testimony whereof we affix our signatures.

RALPH I. ELLIOTT. CARL E. LICHEN S.

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