US3733751A - Method of and apparatus for sharpening small hand tools - Google Patents
Method of and apparatus for sharpening small hand tools Download PDFInfo
- Publication number
- US3733751A US3733751A US00140909A US3733751DA US3733751A US 3733751 A US3733751 A US 3733751A US 00140909 A US00140909 A US 00140909A US 3733751D A US3733751D A US 3733751DA US 3733751 A US3733751 A US 3733751A
- Authority
- US
- United States
- Prior art keywords
- stropping
- blade
- grinding
- wheel
- carrier
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B3/00—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools
- B24B3/36—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of cutting blades
Definitions
- ABSTRACT A grinder for tool blades having spaced coaxial grinding and stropping wheels, the stropping wheel being of smaller diameter than the grinding wheel, and a tool carrier movable along an axis parallel to the axes of the wheels.- The angle made by a blade with the stropping wheel is greater than that made with the grinding wheel to remove the burr from the blade and provide a sharp edge thereon.
- the main object of the present invention is to provide a method of and apparatus for sharpening tool blades whereby a clean keen edge is formed on the blade in a repeatable manner without any skill and in a time which is reduced relative to the conventional methods.
- the invention includes applying the front facet of the blade first to a grinding wheel at a predetermined fixed angle relative thereto and then to a stropping wheel at a slightly higher angle whereby the grinding burr is removed.
- the tool is clamped on a carriage which can be moved transversely relative to the two wheels of which the grinding wheel is of a larger diameter and in which the axes of the wheels are located relative to the carriage to ensure that the difference in angle required is automatically obtained when the carriage and the attached blade is moved from the grinding wheel to the stropping wheel.
- the stropping wheel may comprise a wheel of flexible material to which is applied a lapping powder in wax or other base carrier.
- the invention also includes a grinder for sharpening tool blades which includes a grinding means and a stropping means, means to drive the grinding means and stropping means, a tool carrier movable transversely relative to the grinding means and the stropping means, the stropping means being located from the tool carrier by a distance greater than the grinding means whereby a blade carried by the tool carrier makes a greater angle with the stropping means than with the grinding means.
- a grinder for sharpening tool blades which includes a grinding means and a stropping means, means to drive the grinding means and stropping means, a tool carrier movable transversely relative to the grinding means and the stropping means, the stropping means being located from the tool carrier by a distance greater than the grinding means whereby a blade carried by the tool carrier makes a greater angle with the stropping means than with the grinding means.
- the grinder includes grinding wheels and a stropping wheel, the wheel being spaced and coaxial, means to rotate the wheels, a tool carrier adapted to receive and return a blade and movable along an axis parallel to the axes of the wheels, the diameter of the grinding wheel being greater than that of the stropping wheel whereby a blade carried by the tool carrier makes a greater angle with the stropping wheel than with the grinding wheel.
- FIG. 1 is a perspective view of the grinder of the invention
- FIG. 2 is a plan view of the grinder
- FIG. 3 is a section along line 3-3 of FIG. 2 shown in chain dash the location of the grinding wheel.
- the tool has a casing 1 in which there is mounted a motor 2 having a shaft 3,3 extending from either side thereof with a grinding wheel 4 fitted on the shaft 3 on one side of the motor and a stropping wheel 5 fitted on the shaft 3' on the other side of the motor.
- the grinding wheel is a conventional abrasive wheel of a grade suitable for the hardness of the blades to be sharpened and the strop is made of a flexible material such as leather, Corfam (Registered Trade Mark) or other similar synthetic materials.
- the stropping wheel is of a smaller diameter than the grinding wheel and the reason for which will be described hereinafter.
- a bar 6 Mounted on the casing l or a sub-frame attached thereto is a bar 6, the axis of which is parallel to the axis of the motor shaft 3,3 and on this bar there is located a movable carriage 7.
- the carriage 7 is a clamp having a lower member 8 which includes an eye 9 having a close sliding fit about the bar 6 and a lower clamp jaw 10.
- a lock screw 14 can be provided in the upper jaw 11 whereby the blade 13 can be positively located.
- a guide can be provided on the lower jaw against which the blade can abut to ensure that the blade is at right angles to the bar 6.
- upper surface of the casing is provided with a plurality of index marks 16 against which the bevelled end of the blade 13 can be located to ensure that the angle to which the bevel is to be ground is the predetermined angle and also, if required, to ensure the blade end is parallel to the axes of the wheels.
- an adjustable rest which helps support the blade adjacent its point of contact with the wheel to thereby limit the material removed and to aid in ensuring that the effective angle is maintained constant.
- the blade is clamped in the carriage by screws 12 and the desired length of blade protrusion is then set by location of the blade end on an index mark 16 and the locating screw 14 is tightened.
- the motor is started as by switch 17, and the tool is moved backwards and forwards across the grinding wheel 4 until a ground face of the required angle has been formed.
- the carriage 7 is slid along the bar 6 until the edge of the tool is above the stropping wheel 5. Because the stropping wheel is of slightly smaller diameter than the grinding wheel only the tip of the bevel actually contacts the strop and the lapping powder in a carrier which is carried by the stropping wheel acts upon this surface and polishes the extreme edge of the tool to a very fine degree and high polish.
- a grinder for sharpening tool blades which includes a grinding means and a stropping means, means to drive the grinding means and stropping means, a tool carrier movable transversely relative to the grinding means and the stropping means, the stropping means being located from the tool carrier by a distance greater than the grinding means, and means mounting the tool carrier for pivotal movement about an axis parallel to its direction of transverse movement whereby a blade carried by the tool carrier makes a greater angle with the stropping means than with the grinding means.
- a grinder for sharpening tool blades including a grinding wheel and a stropping wheel, the wheels being spaced and coaxial, means to rotate the wheels, a tool carrier for receiving and retaining a blade and movable along an axis parallel to the axes of the wheels, and means mounting the tool carrier for pivotal movement about said axis; the diameter of the grinding wheel being greater than that of the stropping wheel whereby a blade carried by the tool carrier makes a greater angle with the stropping wheel than with the grinding wheel.
- the grinder as claimed in claim 2, wherein the means to rotate the wheels is a motor having a shaft, the wheels each being located on the shaft of the motor, one wheel being located on one side of the motor and the other wheel on the other side of the motor.
- the grinder as claimed in claim 2 including a grinder casing, a bar parallel to the wheels axes connected to the grinder casing, the tool carrier being located on the bar, and being connected to the casing.
- the grinder as claimed in claim 4 wherein the grinder casing is provided with at least one index mark parallel to the wheels axes, the index mark being so located that when a blade attached to the carrier is adjusted to contact the mark the blade is set so that a predetermined bevel angle will be ground thereon.
- a method of sharpening tool blades including the steps of locating the blade in a carrier which is constrained for movement transverse to a grinding means and a stropping means and which carrier is mounted for pivotal movement about the axis of movement, moving the carrier so the blade can be contacted with the grinding means to form or reform a bevel thereon, moving the carrier transversely so the blade can be contacted with the stropping means which is spaced further from the carrier than is the grinding means, and
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AUPA110770 | 1970-05-06 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3733751A true US3733751A (en) | 1973-05-22 |
Family
ID=3764640
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00140909A Expired - Lifetime US3733751A (en) | 1970-05-06 | 1971-05-06 | Method of and apparatus for sharpening small hand tools |
Country Status (7)
Country | Link |
---|---|
US (1) | US3733751A (fr) |
CA (1) | CA924905A (fr) |
DE (1) | DE2121985A1 (fr) |
FR (1) | FR2091302A5 (fr) |
GB (1) | GB1293729A (fr) |
NL (1) | NL7106247A (fr) |
ZA (1) | ZA712917B (fr) |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3879899A (en) * | 1973-03-28 | 1975-04-29 | William J Ribar | Scissors sharpener |
US3885352A (en) * | 1974-07-19 | 1975-05-27 | John R Juranitch | Sharpening machine |
US4936053A (en) * | 1988-10-14 | 1990-06-26 | Will Shanelec | Lawn mower blade sharpener apparatus |
US5218787A (en) * | 1991-09-27 | 1993-06-15 | Rice Gary F | Apparatus for sharpening implements |
US5527208A (en) * | 1994-05-19 | 1996-06-18 | Parkwood Products Co. Inc. | Fixture for holding and aligning a blade of a hand tool |
US6475074B2 (en) * | 2000-11-15 | 2002-11-05 | Dean Blanton | Sharpener attachment for rotary tool |
US7118466B2 (en) | 2004-11-22 | 2006-10-10 | Laney W L | Scissor sharpening machine |
US7121923B1 (en) * | 2006-04-20 | 2006-10-17 | Martin P. Gottlieb | Dual position sharpening device |
US20090004956A1 (en) * | 2006-12-15 | 2009-01-01 | Jessem Tool Company | Honing jig |
US20110136413A1 (en) * | 2009-12-03 | 2011-06-09 | Borsch Michael G | Blade sharpening system for multiple blade shapes |
US20110201261A1 (en) * | 2009-09-01 | 2011-08-18 | Ele Grigsby | Scraper Accommodating Different Sizes of Blades |
US20120094582A1 (en) * | 2009-05-15 | 2012-04-19 | Michael Lytinas | Blade sharpening device |
US20140051338A1 (en) * | 2011-05-03 | 2014-02-20 | Sun-min Hong | Knife Sharpening System |
CN106944885A (zh) * | 2017-04-28 | 2017-07-14 | 周俭生 | 立式平磨用的磨胶刀装置 |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB8707494D0 (en) * | 1987-03-28 | 1987-04-29 | Ketteringham T | Sharpening edge tool |
GB8805728D0 (en) * | 1988-03-10 | 1988-04-07 | Ketteringham T | Apparatus for sharpening edge tools |
-
1971
- 1971-05-04 ZA ZA712917A patent/ZA712917B/xx unknown
- 1971-05-04 DE DE19712121985 patent/DE2121985A1/de active Pending
- 1971-05-05 CA CA112234A patent/CA924905A/en not_active Expired
- 1971-05-06 NL NL7106247A patent/NL7106247A/xx unknown
- 1971-05-06 GB GB03552/71A patent/GB1293729A/en not_active Expired
- 1971-05-06 FR FR7116409A patent/FR2091302A5/fr not_active Expired
- 1971-05-06 US US00140909A patent/US3733751A/en not_active Expired - Lifetime
Cited By (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3879899A (en) * | 1973-03-28 | 1975-04-29 | William J Ribar | Scissors sharpener |
US3885352A (en) * | 1974-07-19 | 1975-05-27 | John R Juranitch | Sharpening machine |
US4936053A (en) * | 1988-10-14 | 1990-06-26 | Will Shanelec | Lawn mower blade sharpener apparatus |
US5218787A (en) * | 1991-09-27 | 1993-06-15 | Rice Gary F | Apparatus for sharpening implements |
US5527208A (en) * | 1994-05-19 | 1996-06-18 | Parkwood Products Co. Inc. | Fixture for holding and aligning a blade of a hand tool |
US6475074B2 (en) * | 2000-11-15 | 2002-11-05 | Dean Blanton | Sharpener attachment for rotary tool |
US7118466B2 (en) | 2004-11-22 | 2006-10-10 | Laney W L | Scissor sharpening machine |
WO2007124262A2 (fr) * | 2006-04-20 | 2007-11-01 | Gottlieb, Martin, P. | Dispositif d'affutage a deux positions |
US7121923B1 (en) * | 2006-04-20 | 2006-10-17 | Martin P. Gottlieb | Dual position sharpening device |
WO2007124262A3 (fr) * | 2006-04-20 | 2008-09-18 | Gottlieb Martin P | Dispositif d'affutage a deux positions |
US20090004956A1 (en) * | 2006-12-15 | 2009-01-01 | Jessem Tool Company | Honing jig |
US20120094582A1 (en) * | 2009-05-15 | 2012-04-19 | Michael Lytinas | Blade sharpening device |
US20110201261A1 (en) * | 2009-09-01 | 2011-08-18 | Ele Grigsby | Scraper Accommodating Different Sizes of Blades |
US20110136413A1 (en) * | 2009-12-03 | 2011-06-09 | Borsch Michael G | Blade sharpening system for multiple blade shapes |
US8597083B2 (en) | 2009-12-03 | 2013-12-03 | Michael G. Borsch | Blade sharpening system for multiple blade shapes |
US9039493B2 (en) | 2009-12-03 | 2015-05-26 | Michael G. Borsch | Blade sharpening system for multiple blade shapes |
US20140051338A1 (en) * | 2011-05-03 | 2014-02-20 | Sun-min Hong | Knife Sharpening System |
US9193023B2 (en) * | 2011-05-03 | 2015-11-24 | Sun-min Hong | Knife sharpening system |
CN106944885A (zh) * | 2017-04-28 | 2017-07-14 | 周俭生 | 立式平磨用的磨胶刀装置 |
Also Published As
Publication number | Publication date |
---|---|
CA924905A (en) | 1973-04-24 |
NL7106247A (fr) | 1971-11-09 |
DE2121985A1 (de) | 1971-11-25 |
ZA712917B (en) | 1972-02-23 |
GB1293729A (en) | 1972-10-25 |
FR2091302A5 (fr) | 1972-01-14 |
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