US 1667282 A
Description (OCR text may contain errors)
,April 24, 1928.
P. D. CALLUM GUARD FOR KNIFE SHARPENING STEELS gym-"kw Gum/M Filed Sept. 9, 1925 Patented Apr; '24, 1928;
UNITED "STATES PATIENTOFFICE-3 rrms'ronn QALLUM, or BALTIMORE, MARY AND) c GUARD r03 xnrrnsnnnrnnme STEELS. I V
applicatio fi l e iisentniber 9 seria "m. 55,210. I
This inventionrelates to improvements in guards, and more particularlyto guards tor knife sharpening steels.
butchers, coo-ks, servitors andthe" like for the sharpening of butchering, carving, serving and other knives aregenerally'defective in that they provide no safety means, thus in the use thereof injury is often inflicted to the hand and particularly to'the wristand knuckles. Suchinjuries' are occasioned by too long a stroke given to the knifeunden.
going sharpening the sli ping of the'knife from contact with the s arpemngsurtace,
or the holding hand. grasping the handle of a the sharpening steel too closeto'the sharpening area.
an object of my invention is to overcome the existing defects in knvi'lteysharpening steels now in use by the production of a guard. which may be easily and'quickly attached or removed'aiiclflvill, when attached or in use, efliciently pertorn all of' its intended functions. 7 p Another object of my invention is to provide a guard for a knife sharpening steel so constructed and attached, as to*contribute a gre ater ease and co1nfort'tothe user as well as safety and efficiency in operation. v
A further object of my invention is to provide a guard for a knife-sharpening steel so constructedand arranged aslto receive and deflect the blow of'a knife'in sucha manner that noinjury will be imparted to the blade; and thatthe blade will be prevented from leaving the guard. I
A still further obje'ctot my invention is to provide a guard for a" knife" sharpening steel'whi'ch has the advantagesof a positive guard, highly efiicient in' operation; and yet of such marked simplicity that its'manu- :laeture may be economically facilitated. 1
The marked advantage of this invention is the production of a guard for a knife sh arpening steel susceptible of being applled to any sharpening steel now in use or any sharpening steel inthe manufacture"thereof,
the guard consisting primarily of a plate having a central aperture and a plurality appended claims. a y i In order to make my invention inoreclearrollin of the lug upon itself of upon. its edgfeg the lugs being radially disposed and equally spaced with respect to each other. The lugs are rolled or folded upon themselves and pressed upon the plate in such a manner as'to produce an abrupt parabolic curve on their inner faces which will have tendency to deflect a knife blow an dto'catoh the blade in a groove which ls 'tformed betneenthe lug thus rolled oi -folded and the face of the plate. l
fVVitlr these and other objects in View which may be iucidentto my improvements, I
the ii'ivention consists in theparts, and combinations to be hereinafter set 'forth- 'and claimed, with the understanding that the several necessary elements comprisingmy invention, may be varied in construction, proportions and arrangement Without depar-ungifmm the/spirit and scope of the 1y understood, I have shownin the accompanying drawings means vtor carrying the same into practlcal effect wlthout limiting the improvements in their useful applications to the particular constructions, which for the purpose of: explanation, have been made the subject otillustration.
In the drawings forming a part of this specification: p i Figure l is a side elevation, of almife sharpening steel with my improved guard attached.
Fig. 2 is a sectional view takenon line 2- 2 Figure 1, looking inthe direction of the arrows, v V
Fig. 3 is asectional view taken on line 3-3 Figure 2 illustrating the foldingor and the top or 12153 of the plate, and
'Fig. 4 is a plan vievvo'li a modified form beingshoivnin section.
Referring by numerals to the drawlngs 1 represents a l1andle,'wlnch may he of any ofs uardr the steel to which it is attached desired shape or form according to the fancy I of the producer. Mounted in the handleis knife sharpening steel ,2, the shank of which is passed through: a ferrule 3. The ferrule 3 is fitted snugly upon the handle and forms a; collar around the steel- This construction is well known in implements of this character, the size and minor details varying according to their usage. The mplement here shown is a butchers or meat eutters steel.
In Figure 1, I have illustrated my improved guard as attached. The guard consists of a disk or plate 4 of soft brass, varying in size according to the use to which the knife sharpener is to be put. This plate is formed of soft brass so as to absorb the blow with practically no injury to either the knife blade or the guard should the knife come directly in contact therewith, and at the same time effectively guard the hand holding the sharpening steel and prevent injury thereto.
The plate 4 is provided with a central aperture 5 conforming to the size ofthe steel upon which the plate is to be placed so as to produce a snug fit. The plate l is slipped over the steel 2 and secured to the ferrule 3 in any desirable manner. It may be formed as an integral part of the ferrule, riveted or sweated thereupon. The plate a is provided -,with a plurality of radially disposed lugs 6 equally spaced with respect to each other and to the central aperture. The lugs 6 are formed into stops or buffers by folding or rolling the same inwardly upon themselves and pressing them tightly against the face of the plate in such a manner as to produce on their inner or ,oppositely dispo ed faces abrupt parabolic curves 7. This curved surface has a tendency to deflect a knife blow. In folding or rolling and pressing the lug 6 upon the face of the plate, a V-shaped groove 8 is formed. This groove is designed to receive the edge of a knife blade deflected from the sharpening steel and to contribute to the effectiveness of the stop in retarding or preventing aknife blade from passing off the hand guard after the guard has absorbed the blow.
In Figure l, I have shown a modification of the guard which consists in forming the plate 4: in the form of an octagon though it is to be understood that the same may be formed of a polygon having any number of sides 9. The object is to prevent or retard a rolling motion of the implement when placed upon any surface, such as a work bench'or work table. At each of the angles formed on the edge by the particular configuration of the plate is a stop formed in the same manner as above described, the same being so shaped as to slightly bevel the angles, as indicated at 10 to avoid the presence of sharp abrasive edges.
l/Vhile I have shown and described the preferred embodiment of my invention, I wish it to be understood that I do not con fine myself to the precise details of construction herein set forth, by way of illustration, as it is apparent that many changes and variations may be made therein, by those skilled in the art, Without departing from 3. In a guard for a knife sharpening steel,
a disk, and a plurality of members on the disk projecting at an acute angle from the plane of the disk.
4. In a guard for a knife sharpeningsteel, a disk and a plurality of members projecting at an angle from the edge of the disk.
5. In a guard for a knife sharpening steel, a substantially circular plate and a plurality of members projecting from the plane of the plate.
6. In a guard for a knife sharpening steel, a substantially circular plate having an aperture in the center thereof and a series of lugs projecting at an angle from the edge of the plate.
7. In a guard for a knife sharpening steel, a disk having an aperture in the center thereof and a plurality of bent lugs on the periphery of the disk.
8. In a guard for a knife sharpening steel, a disk having an aperture in the'center thereof, and a plurality of bent lug; upon the disk in spaced relation to each other.
9. In a guard for a knife sharpening stee a disk having an aperture in the center thereof, and a plurality of bent lugs upon the periphery of the disk in spaced relation to each other and to the aperture.
-10. In a guardfor a knife sharpening steel, a plate having an aperture in the center thereof, a plurality of lugs upon the periphery of the plate and the lugs turned upon the .face of the plate.
11. In a guard for a knife sharpening steel, a plate having an aperture in the center thereof, a plurality of radially disposed and equally spaced lugsupon the edge of the plate, the lugs turned uponthe face of the plate and grooves between the lugs and the face of the plate.
12. In aguard for a knife sharpening steel, a plate having an aperture in the center thereof, .a plurality of radially disposed and equally spaced lugs upon the edge of the plate, the lugs rolled upon the face of the plate, abrupt parabolic curves upon the inner faces of the lugs and slots between the lugs and the face of the plate.
In testimony whereof I affix my signature.
PRESTON D. OALLUM.