US 1909743 A
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Description (OCR text may contain errors)
May 16, 1933. w. BLANKNER' I 1,909,743
KNIFE SHARPENING DEVICE Filed March 16, 1927 :52 0 6711701- MW @M L I 'ing members canbe reciprocated so that the.
Patented Mav16, 1933 PATENT "OFFICE WILLIAM BLANKNER, OF MIAMI, FLORIDA KN 11E SHARPENING DEVICE Application filed March 16, 1927. Serial No. 175,680.
This invention relates to sharpening de-- vices and moreparticularly to a device adapted to sharpen the cutting edge of knives or other articles of cutlery, which device is simple in construction and inexpensive to manufacture but exceptionally efficient in operation.
One of the objects of the invention is to provide asharpening device, the abrasive mem: bers of which are adapted to adjust themselves to conform to the fiat surfaces of the cutting edge irrespective of the vertical po- 1 sition of the knife between the said members, thereby causing the knife to be sharpened along its true cutting edge.
A further object of the invention is to provide means for adjusting the angular relationship of the abrading members so that the cutting. edge of the knife may be sharpened irrespective of the angle of the cutting edge.
A-furtherobject of the invention is to provide means for independently adjustingthe angular position ,of the abrading members- -with respect to'each other and the cutting edge of the knife to be sharpened so that u on engagement of the knife with the abra ing members the said members will automatically adjust themselves to the angle corresponding A to the bevels of the cutting edge.
A Another object of the present invention is to provide means whereby one of the abradsharpening device is capable of sharpening r knives of different thicknesses and sizes.
As a final object of the invention, means are provided whereby upon the'reciprocation of one of the abrading members oil is pumped from a suitable receptacle and deposited upon the sharpening edge of the abrading members to thereby materially assist in the sharp- I ening of the knives or other articles to. be
With the objects above indicated and other objects hereinafter explained in view, my in- J vention consists in the construction and combination of elements hereinafter. described and claimed.
Referring to the drawing: Fig. 1 is a side elevational view of a device embodying my invention.
In the drawing, the frame comprises a bottom plate 11, upwardly extending end 7 members 12 and 13 formed integral with the base plate 11, and the upper portion of the end member 13 is provided with an inwardly extending top plate 14 formed integral therewith and extending inwardly to substantialthe center of the frame 10. This frame 10 1s supported by a plurality of legs 15 disposed at the four corners of the base plate 11 and connected thereto by any suitable means. The base plate 11 is provided with a pair of parallelly extending guides 16 upon the upper surface thereof while the top plate 14 is provided with a pair of parallelly extending thereof, t e guides 16 and 17 being in vertical alignment and formed integral with the base plate 11 and top 14 res ectively or secured in any other suitable man r ler.
. A carriage 18 is positioned between the top plate 14 and the base plate 11, and is pro uides 17 upon the under surface I top plate 19 is provided withla pair of upwardly extending lugs 21 adapted toreciprocate within one of the guides 17 while a sec.- ond pair of lugs 22 are formed integral with a pair of integrally formed depending lugs 23 adapted to freely reciprocate within one of the guides 16 upon the base plate 11, while a second-pair of depending lugs 24'extend parallel with and are spaced apart from the lugs 23 so as to freely reciprocate within the opposite guide 16. From the foregoing description it will be readily seen that the carriage 18 is free to reciprocate within the guides 16 upon the bottom plate 11 and within the top plate 19' and extend parallel with but 5- the guides 17 upon the top plate 14. plurality of supporting members 25 are bolted at 26'and 27 to the ends of the plates- 19 and respectively and extend at an incline due to the fact that the plate 19 is substantially shorter than the plate 20. The angle of these vided at its lower end with a foot or lateral extension 28 and upon its opposite edges with outwardly extending parallel clips 29 which are adapted to support therebetween an abrading member 30. The lower inner edge of the abrading member 30 is rounded the lower end of supporting member abrading member 32 is off, as indicated at 31, and the end of the ,member is adapted to freely rest upon the lateral extension 28'. The upper endof the abrading member 30 is spaced from the supporting member 25 by a spring 32, which spring permits the abrading member 30 to adjust itself to the angle or bevel of the cutting edge of the knife to be sharpened. This adjustment is made possible by the fact that the abrading member 30 is in no manner secured to the supporting member 25, the abrading member 30 being free to move about the rounded edge 31 in engagement with the supporting member 25. The opposite abrading members 32 a plurality of which are herein shown, are each supported by a supporting. member 33 similar to the supporting member 25, the lower end of each 33 being provided with a lateral extension or foot 34 and with parallelly extending side slips 35 between which an abrading member 32 is supported.
The supporting members 33 are each bolted or otherwise secured to a plate '36 which has formed at-its lowerouter edge an ear 37 which is pivoted "at 38 to the ex tension 39 formed integrally upon the upper I surface of the base member 11. The upper end of the abrading member 32 is spaced from the supporting member 33 by a spring 40 similar to spring 32, which separates the abrading member 30 from the-supporting member 25, and the lowerinner edge of the rounded at 41 to permit theabrading member to readily adjust itself within the supporting member 32to the bevel of the cutting edge of the knife.
Itis desirable to adjust the angular position of the abrading member 32 on account of the diflerent bevels of the cutting/ edges 0f the knives to be sharpened, and I therefore provide a screw-threaded rod 42 adapted to engage a screw-threaded opening 43 provided in the upper portion of the end member 12, the inner end of the rod being universally connected at '44 to an extension 45- formed integrallyupon the rear portion 0 the plate 36. The forward end of the rod 42 is provided with a hand wheel'46 keyed or otherwise secured thereto, and upon rota-' tion ofthe hand wheel it will be readily seen that the angular position of the plate 36 and, consequently, of the abrading members 32 is' varied, depending upon the direction of rotation of the hand wheel 46. An indicator may be employed to determine the angular position of the plate 36, and I therefore provide an upstanding arm 47 bolted to the upper portion of the end member 12 and having a graduated portion 48 graduated To maintain a' tension or pressure upon the knife or other implement to be sharpened the reciprocating carriage 18 is constantly held inwardly by means of a plurality of springs 50. These springs,'of which four'in number are herein 1llustrated,-- surround a plurality of horizontally extending rods 51 which have one end screw-threaded into suitable openings 52 in the end plate 13, while the inner end slidably extends through suitable openings in the carriage 18. It will be noticed that the springs 50 are adapted to abut at one end with the inner surface of the end plate 13 while the opposite end abuts with a portion of the carriage 18. These springs maintain the carriage in its innermost position, and when the knife or other implement to be sharpened is forced downwardly between the abrading members 30 and 32, the carriage 18 is moved outwardly against the tension of thesprings 50, and upon removal of the knife the springs 50 will return the carriage to "its normal inward position. It will, therefore, be. noted that a tension or pressure is continually maintained upon the knife while ethe same is being through a suitable slot 58 provided in the base plate 11. The lower portion of the cylinder 54 has connected thereto a pipe 59 the free end of which is adapted to be positioned within the oil contained in the, receptacles 53. At the upper portion of the cylinder '54'pipe lines 60 and 61 communicate through tubing- 62 and 63 respectively with the faces of'the abrading members. The upper end devices it is desirable to' piston f the tubing 62 is connected to the end of a I forked member 64, the free ends of which correspond to the number of abrading members .32 and are held in engagement withthe sharpening surfaces of the abrading members by means of a plurality of clips 65. The
' upper end of the tubing 63 is connected to one end of a forked member 66', the free ends of which correspond to the number of abrading members 30 and are held in contact with the sharpening faces of the abrading members by means of a plurality of clips 67. It will readily be seen that upon reciprocation of the carriage 18 the piston 55 is reciprocated within the cylinder 54 and upon its rearward movement the oil is drawn through the pipe 59 into the cylinder 54, but upon its forward movement the oil within the cylinder is forced upwardly through the pipes 60 downwardly between the abrading members 30 and 32 and-downward movementcauses the abrading members 30 and 32 to adjust themselves to the bevel of the cutting edge of the knife due to the fact that these abrading members 30 and 32 are freely carried by the supporting members will adjust themselves to the bevel of the cutting edge as the knife is moved inwardly and downwardly during the sharpening operation. The farther downwardly the knife is moved the farther outwardly the carriage 18 is moved, and at the same time suflicient pressure is maintained through the springs 20 upon the cutting edge of the knife to cause the same to be completely sharpened; Each.
time the knife is moved forwardly and downwardly during the sharpening operation the carriage is moved outwardly, and each time so that the angle between the abrasive memthe knife is moved backwardly and outwardly the carriage 18 is permitted to move inwardly, thereby causing the oil to be pumped to the sharpening edges of the abrading members. It w ll be noted that the abrading members 30 and 32 are staggered with respect to each other and substantially overlap at their lowerends so that the sharpening of the knife or other implement can be effected substantially throughout the entire sharpening surface of the abrading members.
When the bevel of the abrasive member 32 is changed by rotation of the hand wheel 46, it. may be desirable to position the device bers 30 and 32 as related to a line perpendicular through the apex of the angle is the same. Therefore the frame 10 may be pivoted at 68 to the legs 15 and the opposite 25 and 33. They legs 15'can have a lug 69 formed integral therewith and extend inwardly with a tapped opening/70 extending through said lugs 69. The base plate 11 supports a rotatable bolt 71 provided with shoulders 72 to prevent longitudinal movement of the bolt and the lower end of the latter is screw-threaded and engages with the tapped opening 70 in the lugs 69.
It will, therefore, be seen that the horizontal position of the frame 10 can be changed by turning the bolt 71 which thereby centralizes the abrasive members 30 and 32 with respect to a line perpendicular with the apex of the angle between the members. This adjustment permits the knife being sharpened to engage the abrasive members in a vertical position and thereby produce an even edge upon the knife.
While I have described the preferred construction of the device embodying my in vention, it is to be understood-that various changes in the construction and arrangement of the different elements can be resorted to without departing from the spirit of the invention as-defined in the appended claims.
Having thus described my invention, I claim:
1. A knife sharpeningdevice comprising two sets of abrading members positioned in staggered relation and extending upwardly at a diverging angle, means for supporting each set of members, one ofsaid supporting .means being angularly adjustable manually,
and means for causing said members to adjust themselves to the different bevels of cutting edges of implements upon engagement therewith.
2. A knife sharpening device comprising two sets of abrading members positioned in staggered relation and extending upwardly at a diverging angle, cans for supporting each set of members, one of said supporting means being movable in the same plane toward and away from the other of said supporting means while the'other of said supporting means is angularly adjustable, and means for causingsaid members themselves to the different bevels of cutting edges ofv implements upon engagement therewith.
' 3. A. knifesharpening device comprising to adjust dicating' means-associated with said supporting means adapted to indicate the angular position of said adjustable supporting means,
and means for causing said members-to adjust themselves to'thed'fi'erent bevels of-cutting edges of implements upon engagement therewith.
4. A knife sharpening device comprising two sets of abrading members positioned in adjustingsai d supporting means, and ,"for causing .saidmembers to ad ust themat a diverging angle,
staggered relation and extending upwardly means 7 for supporting one of said supporting means for means each set of members, means being angularly adjustable,
selves to the different bevels of cutting edges. of implements upon engagement therewith.
' 5. 'A knife sharpening device comprising .two sets of ab'radmg memberspositioned 1n "staggered relation and extendlng upwardly 7,. In a knife sharpenlng at a diverging angle, each set of members, means being movable ward and away from f staggered relation and extending upwardly .means for supporting one of saidsupporting toward and away from at a' divergent angle, eachset of members, means being movable the other of said supporting means, means for maintaining said movable supporting means in its normal inward position, and means for causing said members to adjust themselveswith respect to said supporting means to the different bevels of cutting edges of implements upon engageme t therewith. device and the like, the combination of a frame, a member pivotally connected to said frame, a plurality of abrading members supported by said member, a carriage slidablymounted on said frame, and a plurality'of abrading members supported by said carriage,-each plurality of abrading members being positioned in stagespect tovthe other plurality of a rading a members.
' being positioned-in staggered-relation and at plurality of ab 8,. In a knife sharpenmgdevice andthe like, the combination of a frame, pivotally' connected to said frame, means for adjusting the angular'p'osition of said member, a lurality of ported y said member, mounted-on'said-frame, and a p uralityof abrading \memb'ers supported by said carriage, each plurality of abrading members a carriage slidably a converging angle with respect to the other fad ng members. 9. Ina kni s pening device and the like, the comblnation of a-frame, a plate piv-' otally connected to said vframe, supporting.
bers carried by 'said resilient means positione members fixed to said plate, abrading mem-' etween said su portmg e e an said'abrading' 1m suiplortmg members,
bers, a carriage slidably mounted on said frame, supporting members connected to said carriage, abrading members carried by said latter supporting members, and resilient means p sitioned between the second abrading mem ers and their the first set of abrading members being staggered and at a converging angle with respect to the other set of abrading members.
In testimony whereof, I hereunto affix my signature.
WILLIAM BLANK ER.
edges of implements supporting members,
gered'relation and at a converging an le with a member abrading members sup- 1