US501267A - Sharpener for knives - Google Patents

Sharpener for knives Download PDF

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US501267A
US501267A US501267DA US501267A US 501267 A US501267 A US 501267A US 501267D A US501267D A US 501267DA US 501267 A US501267 A US 501267A
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Prior art keywords
sharpener
disks
knives
sharpened
edges
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D15/00—Hand tools or other devices for non-rotary grinding, polishing, or stropping
    • B24D15/06—Hand tools or other devices for non-rotary grinding, polishing, or stropping specially designed for sharpening cutting edges
    • B24D15/08—Hand tools or other devices for non-rotary grinding, polishing, or stropping specially designed for sharpening cutting edges of knives; of razors
    • B24D15/081—Hand tools or other devices for non-rotary grinding, polishing, or stropping specially designed for sharpening cutting edges of knives; of razors with sharpening elements in interengaging or in mutual contact
    • B24D15/082—Hand tools or other devices for non-rotary grinding, polishing, or stropping specially designed for sharpening cutting edges of knives; of razors with sharpening elements in interengaging or in mutual contact the elements being rotatable

Definitions

  • My invention relates to that class of sharpening devices in which two cutting edges are held adjacent in a suitable support and between which the blade of a knife or the like is drawn to be sharpened.
  • the invention has for its object to produce a device which may be used for a much greater length of time than those heretofore made and which will accomplish the purpose intended in a more efficient manner than.
  • A represents a supporting piece which is centrally bent as shown and formed in two upwardly extended arms a. a secured to the base 0t so as to lean outwardly. Upon the arms a a are secured the sharpening disks B, O, which are grooved in their peripheries to form four cutting edges 1) c b c. The disks when secured in place will be disposed obliquely, owing to the bend in the supporting piece A and inclined out from the base as described.
  • the backing piece D has two projections d d one of which is provided with a cutting edge (1 to furnish a thread cutter, the other (1 serving as a guide when scissors are to be sharpened.
  • a blade is inserted in slit d with the edge between the disks and drawn through against the edges in a direction from the base 0. until properly sharpened.
  • the disks being arranged to lean outwardly from the base in one directionin which the blade is drawn, greatly facilitates its smooth travel while if they were perpendicular the blade would often jump and stickimpairing the edge to a great degree.
  • the grooves in the disks provide two cutting edges for each so that they may be reversed when dulled and new edges exposed to the article to be sharpened, the inclination of the disks permitting but oneedge of each to come into contact with the knife blade or other article
  • the cutting edges being The advantages circular maybe revolved as they become worn, so that the device is both reversible and universal in its use.
  • the improved sharpener comprising cutting disks disposed outwardly at an angle and inclined from the base, a groove upon the periphery of each to form two cutting edges one edge of one disk lying between two edges of the other, and a brace for holding them, substantially as described.

Description

(No Model.)
i 0. K. BRADFORD.
SHARPBNERFOR KNIVES, &c.
No. 501,267. Patented July 11, 1893.
- C/wcrZes Zlfiracifari.
UNITED STATES PATENT OFFICE.
CHARLES KEMPTON BRADFORD; OF LYNNFIELD, MASSACHUSETTS.
SHARPENER Fo'R KNIVES, 80C.
SPECIFICATION forming part of Letters Patent No. 501,267, dated July 11 1893.
Application filed July 7, 1892- Serial No.439,221. (No model.)
To ail whom it may concern:
Be it known that I, CHARLES KEMPTON BRADFORD, of Lynnfield, in the county of Essex and State of Massachusetts, have invented an Improved Universal and Reversible Sharpener for Knives, Scissors, and Like Articles, of which the following is a specification, reference being bad to the accompanying drawings, in which-- Figure 1 is a plan, and Fig. 2 a perspective of my improved sharpener. Fig. 3 is a section on line 44 of Fig. 2. Fig. 4 illustrates the disk used.
My invention relates to that class of sharpening devices in which two cutting edges are held adjacent in a suitable support and between which the blade of a knife or the like is drawn to be sharpened.
The invention has for its object to produce a device which may be used for a much greater length of time than those heretofore made and which will accomplish the purpose intended in a more efficient manner than.
heretofore.
In the drawings in which I have shown the best form of my invention A represents a supporting piece which is centrally bent as shown and formed in two upwardly extended arms a. a secured to the base 0t so as to lean outwardly. Upon the arms a a are secured the sharpening disks B, O, which are grooved in their peripheries to form four cutting edges 1) c b c. The disks when secured in place will be disposed obliquely, owing to the bend in the supporting piece A and inclined out from the base as described. It is desired that the cutting edges of the disk should overlap, and to effect this I use washer a between arm a.- and disk 0, and washer 0, between disk B and a backing piece D which is bent to conform to the angle of the disks and has the slit d to form a guide for the article to be sharpened. It will be observed that this arrangement permits one edge of one disk to be between the two edges of the other so that in use only the two inner edges of the disk vto be sharpened.
engage the article to be sharpened. The backing piece D has two projections d d one of which is provided with a cutting edge (1 to furnish a thread cutter, the other (1 serving as a guide when scissors are to be sharpened.
The device having been secured'upon a desirable rest, a blade is inserted in slit d with the edge between the disks and drawn through against the edges in a direction from the base 0. until properly sharpened. of the invention will now be readily understood. The disks being arranged to lean outwardly from the base in one directionin which the blade is drawn, greatly facilitates its smooth travel while if they were perpendicular the blade would often jump and stickimpairing the edge to a great degree. The grooves in the disks provide two cutting edges for each so that they may be reversed when dulled and new edges exposed to the article to be sharpened, the inclination of the disks permitting but oneedge of each to come into contact with the knife blade or other article The cutting edges being The advantages circular maybe revolved as they become worn, so that the device is both reversible and universal in its use.
' I claim as my invention 1. In a sharpener two disks, B, 0, each grooved about its periphery to form circular cutting edges b, c,- and b c relatively disposed to form an angle, and with one cutting edge of one between the two cutting edges of the other, substantially as described.
2. The improved sharpener comprising cutting disks disposed outwardly at an angle and inclined from the base, a groove upon the periphery of each to form two cutting edges one edge of one disk lying between two edges of the other, and a brace for holding them, substantially as described.
CHARLES KEMPTON BRADFORD.
Witnesses:
JONATHAN CILLEY, JoHN'R. SNOW.
US501267D Sharpener for knives Expired - Lifetime US501267A (en)

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