US1699510A - Metal-sharpening machine - Google Patents

Description

H. J. GAISMAN ET AL METAL SHARPENING MACHINE Filed Aug. 14, 1925 4 Sheets-Sheet 1 Jan. 15, 1929. 1,699,510

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H. J. GAISMAN AL.

METAL SHAR PENING MACHINE Filed Aug. 14, 1925- 4 Sheets-Sheet 2 Wdness A T Jan. 15, 1929. 1,699,510

. H. J. GAISMAN ET AL METAL SHARPENING MACHINE Filed Aug. 14, 1925 4 Shets-'-Sheet 3 0 un/ M ME Jan, 15, 1929. 1,699,510

H. J. GAISMAN ET AL vMETAL SHARPENING MACHINE Filed Aug" 14, 1925 4 Shepts-Sheet 4 21 7 Z8 22 i h 4a WEI/less d f' y glitmvwa Patented Jan. 15, 1929.

onirno sra'rrs PATENT OFFICE.

HENRY J. GAISMAN, OF NEW YORK, AND CONRAD SCHUMAGI-JER, F LYITNBROOK,

NEVJ' YORK, ASSIGNORS TO AUTOSTBOP PATENTS GOREOBIATION, OF DOVER, DEL- AWARE, A CORPORATION OF DELAWARE.

METAL-SHARPENING MACHINE.

Application filedAugust 14, 1925. Serial 1110. 50,227.

This invention relates to improvements in machines for sharpening and honing metal, such as strips of metal continuously fed, and the invention has for its object to provide means for grinding or honing the sides or edges of metal strips or pieces as fed. The invention is particularly adapted for producing a sharp edge upon a metal strip adapted to be cut into desired lengths for use as razor blades, and for ther purposes.

In carrying out the invention we provide a pair of opposing rotative disks between which the strip of metal is to be fed, which disks are provided with correspondingly arranged spaced abrading surfaces located upon spaced projections on corresponding faces of the disks between intervening spaces therein, so arranged that a projection of one disk will enter a space of the other disk, and vice versa, the axes of the disks being located at an oblique angle, whereby the abrading surfaces along one edgeportion of each. disk will engage the strip during rotation of the disks.

The invention also comprises noveldetails of improvement that will be more fully hereinafter set forth andthen pointed out in the cl aims.

Reference is to be had to the accompanying drawin forming a part hereof, wherein Fi 1 is a front elevation of a. machine cms bodying our invention;

Fig. 2 is a plan view; Fi 3 is a rear elevation oarts bein omitb 7 b ted Fi l is a section on line ll, 4, in Fig. 3; Fig. is a section substantially on the plane In the accompanying drawings the numeral 1 indicates a suitable frame shown provided with a table or top 2. At 3 are bearing n'iembers shown bifurcated at their upper ends, and adjustably supported at opposite sides of the frame, adapted to rotatively support the grinding or honing disks 4: between which the strip of metal 5 to be sharpened travels. The frame carries bolts or pivots 6 in eyes 7 on the frame, (Fig. 4), which bolts are keyed to studs 8 that pass through holes in the bases of the bearing members 3'and are secured by nuts 9, nuts 10 on the bolts 6 securing the latter in set position. The arrangement is such that the bearing members 3 may be adjusted toward and from each other and angularly to regulate the opposing and angular positions of the disks respecting one another. The disks l are secured to shafts 11 respectively carried by a bearing member Shaft 11 is slidably supported in a bushing or hollow shaft 12 journaled in the bearing member 3 and retained from endwise movement by heads or disks 13 and 14 shown secured by screws to the said member, (Fig.

Shaftll is slidably adjustable in bushing 12 and provided with a key-way 15 receiving a key 16 secured by a screw to the lmshing. whereby the latter will rotate the shaft. A pulley 17 is secured to the bushing 12 for rotating the latter and the shaft 11. A gear 18 is shown secured to the pulley by screws. The shaft 11, bushing 12 and correlated parts are the same for each disk 4. Each shaft 11 is longitudinally adjustable in order that the two opposin disks a may be adjusted toward and from each other to regu late engagement of the disks with the strip 5 on the opposite sides thereof. A nut or finger-piece 19 is mounted upon an extension 14-3 of head 14 and connected thereto by threads at 20. The shaft 11 at the outer end is provided with a head 11 located within a recess 19 in nut 19 and bearing against the latter, and a compression spring 21 is interposed betwecn said shaft and a cap or disk 22 secured by screws on the outer end of nut 19 over recess 19 (Fig. 5). When nut 19 is screwed toward the bushing 12 the shaft ll 46 will be driven in unison with'the rotation of disks a for feeding strip 5 in accordance with the rotation of said disks. 7

When the strip 5 is fed and the disks 4; rotate in unison, in the'direction of the respective arrows in Fig. 7 the outer portions of the projections P will first engage corresponding edge portions of the strip, and during such engagement of said projections with the strip during their progression therealong the abrading or grinding surfaces of the disks will not only operate upon the strip in a more or less transverse direction but also in. a longitudinal direction as the arcuate projections change their angular relation to the edges of the strip, with what may be termed a wiping or sweeping action. According to the relation of the projections 4 shown the wide outer portions of the projections first engage the strip 5 and as the disks rotates the narrow portions of the projections are presented gradually to the strip edge until the extreme inner portions of the projections pass from the strip, and while the latter action is occurring respecting one projection the Wide portion of another projection is in engagement with the strip, and so on successively for the several projections as the disks rotate, so that all portions of the edges of the strip will be engaged by the projections and the strip Will be supported at all times by a projection on one side immediately adjacent the place of sharpening of its opposite side by a projection on the other disk. Due to the angular relation of the disks to one another the rear portions only of the disks will engage the strip in what may be called a V-like relation, and in conjunction with the convex inner faces of the disks the projections will sweep along the strip edges in such a Way as to produce ground or honed edges on the opposite sides of the strip having the desired bevel or angular relation along the longitudinal edge of the strip. The machine may be equipped with a single pair of the disks adapted either for grinding or honing, and the machine may have several sets of disks suitably spaced along the strip for grinding successively, or for grinding and honing successively, or for honing successively, according to the character of the finished edge desired on the strip.

The invention enables rapid and economical grinding and honing of metal strips as they travel in suitable lengths through the machine in a continuous manner, as from a reel of the strip suitably mounted. The ground or honed strip may be Wound on a take-up reel, in a Well known way, or may be cut off into suitable lengths as delivered from the disks, as for razor blades or for other purposes. Blades or metai pieces previously cut to the desired length may be fed through the machine to be ground or honed.

If it is desired to sharpen, (grind or hone),

parting from the spirit of the invention.

but one side of the strip one of the disks 4 may be omitted. H r V Theinvention is not limited to the details of construction and arrangement of parts set forth, as'the same may be varied, within the scope of the appended claims, without de- We use the term sharpen and sharpening to include grinning or honing or both.

Having'now described our invention, what we claim is 1. A sharpening machine comprising means to guide a strip, means to feed the strip, sharpening disks located on opposite sides of the strip, said disks having convex faces and having spaces and curved sharpening projections between said spaces, shafts rotatively supporting said disks at angles to one another with the disks tilted respecting the strip, means to rotate said shafts and disks in the same direction and at the same speed with projections of one disk in spaces of the opposing disk and in engagement with the strip, said projections and spaces being inclined to radii which intersect them so that the strip is supported at all times on one side by a pro jection on one disk immediately adjacent the place of sharpening of its opposite side by a projection on the other disk.

2. A sharpening machine comprising coacting sharpening disks, each of which disks has curved spaces and projections intermeshing in spaced relation and inclined from one end to another respecting intersecting radii, and means for mounting the disks at angles to their vertical andhorizontal axes and at an angle to and in engagement with a strip to be sharpened so that the strip will be supported at all times by a projection on one side immediately adjacent the place of sharpening of its opposite side by a projection on the other disk.

3. In a sharpening machine, a pair of opposing disks providcd with spaced inwardly disposed curved spaces and projections, the face of each disk being convex, means rotatably mounting the disks at angles to each other with their projections intermeshing adjacent to one edge, and means to support and propel a strip to be sharpened between and in engagement with the intermeshing portions of the projections, said projections and spaces being inclined to radii which intersect them so that the strip is supported at all times on a side by a projection on one disk immediately adjacent the place of sharpening of its opposite side by a projection on the other disk.

4:. A sharpening machine comprising means to guide a strip, means to feed the strip, sharpening disks located on opposite sides of the strip, said disks having spaces in one side face and curved sharpening proj ections between said spaces which respectiveothex? di'sk; shafts rotaitii'ely filpl'joxfltifig diks at m1 oblique to (She :inother with the disks tilted r'sp'citin; the strip, iheiins direction and lhzihs to cause said disks to mate at the sime speed.

Signed at New York city; county and Sta-9 01" New York this 11th day of August, 1925.

HENRY J. GAISMAN. CONRAD SCHUMACHER.

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