US1405730A - Sharpening tool - Google Patents

Sharpening tool Download PDF

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Publication number
US1405730A
US1405730A US355538A US35553820A US1405730A US 1405730 A US1405730 A US 1405730A US 355538 A US355538 A US 355538A US 35553820 A US35553820 A US 35553820A US 1405730 A US1405730 A US 1405730A
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Prior art keywords
pencil
tool
sharpening
sharpening tool
cutting
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Expired - Lifetime
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US355538A
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Charles V Wright
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B3/00Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools
    • B24B3/60Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of tools not covered by the preceding subgroups

Definitions

  • the object of my invention is to provide a simple and inexpensively made tool for sharpening the cutting rollers or members of devices such as pencil sharpeners of the well-known Boston type, without removing such cutting members and making use of the means for revolving them to effect the resharpening of them, and to this end my invention consists in a tool for the purpose stated having the characteristics defined or included within the scope of the appended claims.
  • FIG. 1 is a perspective view of a tool embodying my invention.
  • Fig. 2 is a side elevation thereof.
  • the taper 11 has a cylindrical shank 10, and at one end a taper 11, corresponding in form and size with the point which the pencil sharpener produces upon a pencil and the periphery or surface f the taper 11 is made file-like as by means of fine screw thread 12, cut therein.
  • Said tool is preferably made from soft steel and after the taper point or extremity is made and given the file-like or cutting surface it is put through a hardening process to harden it to a degree suflicient to cut or grind the metal of the rotary cutting members of the pencil sharpener.
  • the end of the shank 10, opposite the point or taper 11, is formed or provided with a handle to hold the sharpening tool statlonary, which handle may consist of a simple diametrically extending pin or bar 13, lnserted in a diametrically extending hole near the end of the shank.
  • a handle to hold the sharpening tool statlonary which handle may consist of a simple diametrically extending pin or bar 13, lnserted in a diametrically extending hole near the end of the shank.
  • My invention is applicable to sharpening tools for resharpening the cutters of other implements, or cutting appliances, than pencil Sharpeners and with which it is adaptable for use.
  • a sharpening tool for the rotary cutter of a pencil pointing machine comprislng a shank and a pointed member having a surface of a configuration and hardness that will cut metal, said pointed member having a size and shape corresponding with the space between said rotary cutters.
  • a sharpening tool for the rotary cutter of a pencil pointing machine having a shank and a tapering portion of metal, with its periphery formed into a file-like surface, such tapering portion having a size and shape corresponding with the space between such rotary cutters.
  • a sharpening tool for the rotary cutter of a pencil pointing machine comprising a cylindrical shank terminating in a round tapering point, the periphery of the point being an abrading or cutting surface, said shank and point being of one piece of metal, said point having size and shape corresponding with the space between said rotary cutters.

Description

C. V. WRIGHT.
SHARPENING TOOL.
APPLICATION FILED FEB.2,1920.
1,405,730, Pawfited Feb. 7, 1922.
UNITED STATES PATENT OFFICE.
CHARLES V. WRIGHT, OF TAMAQUA, PENNSYLVANIA.
SHARPENING TOOL.
Speeification of Letters Patent.
Patented Feb. '7, 1922.
Application filed February 2, 1920. Serial No. 355,538.
specification, reference being had therein to the accompanying drawing.
The object of my invention is to provide a simple and inexpensively made tool for sharpening the cutting rollers or members of devices such as pencil sharpeners of the well-known Boston type, without removing such cutting members and making use of the means for revolving them to effect the resharpening of them, and to this end my invention consists in a tool for the purpose stated having the characteristics defined or included within the scope of the appended claims.
In the drawings Fig. 1 is a perspective view of a tool embodying my invention.
Fig. 2 is a side elevation thereof.
Referring in part to the case of pencil sharpeners which have rotary cutters so disposed as to provide the customary tapering point upon a lead pencil, I give to my sharpening tool, a rod-like form with a tapering end of a size and form enabling it to be thrust or placed in the pencil sharpener in V the same relation to the rotary cutters thereof, that a pencil to be sharpened occupies, and I provide the surface of the tapering part of the tool with a formation and give to it a hardness that will cut and thus sharpen the cutting edges or parts of the pencil cutting members of the pencil sharpener. Referring to the particular tool illustrated in the drawing, it has a cylindrical shank 10, and at one end a taper 11, corresponding in form and size with the point which the pencil sharpener produces upon a pencil and the periphery or surface f the taper 11 is made file-like as by means of fine screw thread 12, cut therein. Said tool is preferably made from soft steel and after the taper point or extremity is made and given the file-like or cutting surface it is put through a hardening process to harden it to a degree suflicient to cut or grind the metal of the rotary cutting members of the pencil sharpener. The end of the shank 10, opposite the point or taper 11, is formed or provided with a handle to hold the sharpening tool statlonary, which handle may consist of a simple diametrically extending pin or bar 13, lnserted in a diametrically extending hole near the end of the shank. To use my deyice, 1t is necessary simply to insert the po nt or tapering end into the pencil sharpening machine, just as would a pencil to be sharpened be inserted, and then turn the crank of the machine several times to revolve the cutting rollers or rotary pencil cutting members thereof in contact with the abrading or-cutting surface of the tool, the handle end of the latter being held to hold the sharpening tool stationary.
My invention, of course, is applicable to sharpening tools for resharpening the cutters of other implements, or cutting appliances, than pencil Sharpeners and with which it is adaptable for use.
What I claim is 1. A sharpening tool for the rotary cutter of a pencil pointing machine, comprislng a shank and a pointed member having a surface of a configuration and hardness that will cut metal, said pointed member having a size and shape corresponding with the space between said rotary cutters.
2. A sharpening tool for the rotary cutter of a pencil pointing machine, having a shank and a tapering portion of metal, with its periphery formed into a file-like surface, such tapering portion having a size and shape corresponding with the space between such rotary cutters.
3. A sharpening tool for the rotary cutter of a pencil pointing machine, comprising a cylindrical shank terminating in a round tapering point, the periphery of the point being an abrading or cutting surface, said shank and point being of one piece of metal, said point having size and shape corresponding with the space between said rotary cutters.
In testimony whereof I hereunto aflix my signature.
CHARLES V. WRIGHT.
Witnesses:
GEORGE CHRrsT, JOHN BABST, Jr.
US355538A 1920-02-02 1920-02-02 Sharpening tool Expired - Lifetime US1405730A (en)

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