US2288407A - Pencil pointer - Google Patents
Pencil pointer Download PDFInfo
- Publication number
- US2288407A US2288407A US400743A US40074341A US2288407A US 2288407 A US2288407 A US 2288407A US 400743 A US400743 A US 400743A US 40074341 A US40074341 A US 40074341A US 2288407 A US2288407 A US 2288407A
- Authority
- US
- United States
- Prior art keywords
- plate
- legs
- supporting
- pad
- lips
- 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
- 238000004140 cleaning Methods 0.000 description 11
- 239000000428 dust Substances 0.000 description 10
- 229910001651 emery Inorganic materials 0.000 description 4
- VLCQZHSMCYCDJL-UHFFFAOYSA-N tribenuron methyl Chemical compound COC(=O)C1=CC=CC=C1S(=O)(=O)NC(=O)N(C)C1=NC(C)=NC(OC)=N1 VLCQZHSMCYCDJL-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
- B43L23/00—Sharpeners for pencils or leads
- B43L23/006—Sharpeners for pencils or leads with rasping surfaces
Definitions
- ing includes a wooden base provided with a handle and having upon it a pad of sandpaper or emery.
- This device is easily misplaced and has no means for ready fixing to a board or other supporting surface.
- the lead dust can scatter over the board or drawing of the draftsman, thereby causing the drawing to become soiled.
- the usual pad is provided with no means for removing dust from the pencil point which dust soils both the drawing and hands of the draftsman.
- the usual pointer requires the use of both hands of the draftsman, which in some cases i awkward, particularly when one hand is employed in holding the drawing equipment, such as triangles and the like, in place on the drawing. If the drawing board is in a substantially vertical position or at an angle to the vertical, the pointer cannot be placed upon the surface since it would slide off the board. This of course inconveniences the draftsman.
- a further object of my invention is to provide such a device in which the sandpaper or emery" as well as the cleaning pad can be quickly and easily replaced when depleted or worn out.
- a still further object of my invention is to provide a device which can be easily removed as a unit for easy cleaning, or for removing the pad with the emery or cleaning pad, or both.
- a still further object of my invention is to provide a device of this kind which although secured in position is out ofthe way of the draftsman.
- FIG. 1 is a front perspective of a pencil pointing device made according to my invention
- Figure 2 is a top plan view
- Figure 3 is a front elevation
- Figure 4 is a section along the line 44 of Figure 3
- Figure 5 is a partial view in perspective of the device mounted on a vertical board
- the device comprises a base or plate it! having at its opposite ends vertically extending legs [2 and 13 provided with the finger engaging lips l2 and 13.
- the backing plate ll extends beyond the legs
- the legs l2' and [3 are provided with the lips lT-l8 flared outwardly and parallel to the plate or base 10 to be received within the supporting elements or brackets I9 and 20, which can be secured to the supporting surface in either a horizontal or vertical position as shown in Figures 3 and 5 respectively.
- each bracket is provided with a depressed portion 2
- An upwardly turned lip 23 at the rear of the bracket limits movement of the pad holder with respect to the bracket.
- the base is provided with a trough l4 which receives the dust from the pencil after being sharpened.
- a trapezoid shaped base 24 of suitable material Received and supported upon the plate [0 is a trapezoid shaped base 24 of suitable material, sandpaper pad 25 being suitably attached or cemented to base 24 and a soft cleaning pad 26 for example of felt or the like also being attached to base 24.
- the base lll may be wider at the rear than the front to conform to the trapezoid shaped base 24, to prevent displacement of the sandpaper unit.
- Base plate ID is slanted to form a reservoir for graphite particles which accumulate after each sharpening, when reservoir is well filled the holder may be removed and contents disposed of.
- the legs I2 and i3 are provided with pips 29 which extend over and engage the base 24 of the pad frictionally to maintain it in position against the bottom of the holder, the base being flexed to snap it into position under the pips.
- An aperture 21 is provided in the base for releasing the pad when it is desired to renew the same. It is obviou that the unit with the exception of the clamps can be punched from a single sheet of metal and folded to shape.
- a device for sharpening pencils including a plate member provided with supporting legs at the opposite ends of said plate member, said plate member having means provided with a sharpening surface between said legs, and means cooperating with said legs for securing said plate member to a supporting surface, said last means including a pair of oppositely positioned elements between which said legs are slidably received.
- a device for sharpening pencils including a plate member provided with supporting legs at the opposite ends of said plate member, said plate member having means provided with a sharpening surface between said legs, and means cooperating with said legs for securing said plate member to a supporting surface, said means including supporting brackets adapted to be secured to a supporting surface and formed to slidably receive the ends of the legs.
- a device for sharpening pencils including a plate member provided with supporting legs at the opposite ends of said plate member, said plate member having means provided with a sharpening surface between said legs, and means cooperating with said legs for securing said plate member to a supporting surface, said means including supporting brackets adapted to be secured to a supporting surface and formed to slidably receive the ends of the legs between the plate and the supporting surface, and a trough provided along one edge of the plate to receive dust formed during the pointing operation.
- a device for sharpening pencils including a plate member provided with supporting legs at the opposite ends of said plate member, said plate member supporting a removable pad having a sharpening surface between said legs, and means cooperating with said legs for securing said plate member to a supporting surface, said means including supporting brackets adapted to be secured to a supporting surface and formed to slidably receive the ends of the legs between the plate and. the supporting surface, and a trough provided along one edge of the plate to receive dust formed during the pointing operation, said sharpening surface including a removable pad.
- a device for pointing pencils including an elongated plate having legs perpendicularly positioned with respect to said plate at the ends thereof, the ends of said legs being provided with outwardly extending lips parallel to the plate, supporting means for slidably receiving said lips and including brackets to be secured to a supporting surface and formed to provide a space between the brackets and the supporting surface for receiving said lips, .and a pointing means supported on said plate between said legs.
- a device for pointing pencils including an elongated plate having legs perpendicularly positioned with respect to said plate at the ends thereof, the ends of said legs being provided with outwardly extending lips parallel to the plate, supporting means for slidably receiving said lips and including brackets to be secured to a supporting surface and formed to provide a space between the brackets and the supporting surface for receiving said lips, and a pointing means supported on said plate between said legs and including a pad having a sharpening surface and a cleaning surface, a back plate opposite said through and cooperating with said legs for closing the back of the elongated plate and legs.
- a device for pointing pencils including an elongated plate having legs perpendicularly positioned with respect to said plate at the ends thereof, the ends of said legs being provided with outwardly extending lips parallel to the plate, supporting means for slidably receiving said lips and including brackets to be secured to a supporting surface and formed to provide a space between the brackets and the supporting surface for receiving said lips, and a pointing pad supported on said plate between said legs, a back plate opposite said trough and cooperating with said legs for closing the back of the elongated plate and legs, said base being inclined with respect to said back plate for retaining the pointing pad in place.
- a device for pointing pencils including an elongated plate having legs perpendicularly positioned with respect to said plate at the ends thereof, the ends of said legs being provided with outwardly extending lips parallel to the plate, supporting means for slidably receiving said lips and including brackets to be secured to a supporting surface and formed to provide a space between the brackets and the supporting surface for receiving said lips, and a pointing pad supported on said plate between said legs, a back plate opposite said trough and cooperating with said legs for closing the back of the elongated plate and legs, said base being inclined with respect to said back plate for retaining the pointing pad in place, and extensions on said back plate for reception by said supporting means when said device is to be supported in a vertical position.
- a device for pointing pencils including an elongated plate having legs perpendicularly positioned with respect to said plate at the ends thereof, the ends of said legs being provided With outwardly extending lips parallel to the plate, supporting means for slidably receiving said lips and including brackets to be secured to a supporting surface and formed to provide a Space between the brackets and the supporting surface for receiving said lips, and a pointing pad supported on said plate between said legs, a back plate opposite said trough and cooperating with said legs for closing the back of the elongated plate and legs, and extensions on said back plate for reception by said supporting means when said device is to be supported in a vertical position.
- a device for pointing pencils including an elongated plate having legs perpendicularly positioned with respect to said plate at the ends thereof, the ends of said legs being provided with outwardly extending lips parallel to the plate, supporting means for slidably receiving said lips and including brackets to be secured to a supporting surface and formed to provide a space between the brackets and the supporting surface for receiving said lips, and a pointing pad supported on said plate between said legs, a back plate opposite said trough and cooperating with said legs for closing the back of the elongated plate and legs, and extensions on said back plate for reception by said supporting means when said device is to be supported in a vertical position, said legs having pips to frictionally engage the pointing pad to retain it in place.
- a device for pointing pencils including an elongated plate having legs perpendicularly positioned with respect to said plate at the ends thereof, the ends of said legs being provided with outwardly extending lips parallel to the plate, supporting means for slidably receiving said lips and including brackets to be secured to a supporting surface and formed to provide a space between the brackets and the supporting surface for receiving said lips, and a pointing pad supported on said plate between said legs and including a sharpening surface and a cleaning surface, a back plate opposite said trough and cooperating with said legs for closing the back of the plate and legs, said elongated plate being wider adjacent said back plate for retaining the pointing pad in place, and extensions on said back plate for reception by said supporting means when said device is to be supported in a vertical position, said elongated plate having an aperture in the bottom thereof to permit ready removal of said sharpening pad.
- a device for pointing pencils including an elongated plate having legs perpendicularly positioned with respect to said plate at the ends thereof, the ends of said legs being provided with outwardly extending lips parallel to the plate, supporting means for slidably receiving said lips and including brackets to be secured to a supporting surface and formed to provide a space between the brackets and the supporting surface for receiving said lips, and a pointing pad supported on said plate between said legs and including a sharpening surface and a cleaning surface, a back plate opposite said trough and cooperating with said legs for closing the back of the plate and legs, said elongated plate being wider adjacent said back plate for retaining the pointing pad in place, and extensions on said back plate for reception by said supporting means when said device is to be supported in a vertical position, said legs having pips to frictionally engage the sharpening pad to retain it in place, said elongated plate having an aperture in the bottom thereof to permit ready removal of said sharpening pad.
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- Drawing Aids And Blackboards (AREA)
Description
June 30, 1942. E. J. LADA 2,233,407
PENCIL POINTER Filed July 2, 1941 INVENTOR EDMUND J. LADA Patented June 30, 1942 UNITED STATES PATENT OFFICE PENCIL POINTER Edmund J. Lada, Woodhaven, N. Y.
Appiication July 2, 1941, Serial No. 400,743
12 Claims. (01. 120-89) My invention relates to drawing equipment,-
the points of pencils with which they are draw-.
ing, includes a wooden base provided with a handle and having upon it a pad of sandpaper or emery. This device is easily misplaced and has no means for ready fixing to a board or other supporting surface. The lead dust can scatter over the board or drawing of the draftsman, thereby causing the drawing to become soiled. The usual pad is provided with no means for removing dust from the pencil point which dust soils both the drawing and hands of the draftsman. The usual pointer requires the use of both hands of the draftsman, which in some cases i awkward, particularly when one hand is employed in holding the drawing equipment, such as triangles and the like, in place on the drawing. If the drawing board is in a substantially vertical position or at an angle to the vertical, the pointer cannot be placed upon the surface since it would slide off the board. This of course inconveniences the draftsman.
Hence, it is one of the objects of my invention to provide an improved pencil pointer which can be easily fixed in a horizontal or vertical position on a horizontal or vertical drawing board, thus preventing misplacement and freeing the use of both hands.
It is a further object of my invention to provide means on the pointer for disposing of the dust created by sharpening the pencil and also means for removing the dust from the pencil point.
A further object of my invention is to provide such a device in which the sandpaper or emery" as well as the cleaning pad can be quickly and easily replaced when depleted or worn out.
A still further object of my invention is to provide a device which can be easily removed as a unit for easy cleaning, or for removing the pad with the emery or cleaning pad, or both.
A still further object of my invention is to provide a device of this kind which although secured in position is out ofthe way of the draftsman.
The novel features which I believe to be characteristic of my invention are set forth with particularity in the appended claims, but the invention itself will best be understood by reference to the following description taken in connection with the accompanying drawing in which Figure 1 is a front perspective of a pencil pointing device made according to my invention, Figure 2 is a top plan view, Figure 3 is a front elevation, Figure 4 is a section along the line 44 of Figure 3 and Figure 5 is a partial view in perspective of the device mounted on a vertical board,
Referring to the drawing, in Figure 1 the device comprises a base or plate it! having at its opposite ends vertically extending legs [2 and 13 provided with the finger engaging lips l2 and 13. The plate [2, as best shown in Figure 4, i inclined to the rear and provided with a backing plate II for purposes to be described. The backing plate ll extends beyond the legs |2-l3 to provide extensions [5 and I6 for supporting the device in a vertical position in brackets in a manner to be described. The legs l2' and [3 are provided with the lips lT-l8 flared outwardly and parallel to the plate or base 10 to be received within the supporting elements or brackets I9 and 20, which can be secured to the supporting surface in either a horizontal or vertical position as shown in Figures 3 and 5 respectively. As best shown in Figure 1 each bracket is provided with a depressed portion 2| having an outwardly flared lip 22 for receiving and guiding the. lip [8 into the space provided between the portion 2| and the surface to which the bracket is secured. An upwardly turned lip 23 at the rear of the bracket limits movement of the pad holder with respect to the bracket.
The cooperation of the clamp '20 and the extension H5 i shown in Figure 5 when the device is positioned on a vertical board.
The base is provided with a trough l4 which receives the dust from the pencil after being sharpened.
Received and supported upon the plate [0 is a trapezoid shaped base 24 of suitable material, sandpaper pad 25 being suitably attached or cemented to base 24 and a soft cleaning pad 26 for example of felt or the like also being attached to base 24. It will be observed, as best shown in Figure 4, that the unit containing the sandpaper and cleaning pads abuts the plate II to retain the unit in position and to prevent its sliding forward out of the holder. The base lll may be wider at the rear than the front to conform to the trapezoid shaped base 24, to prevent displacement of the sandpaper unit. Base plate ID is slanted to form a reservoir for graphite particles which accumulate after each sharpening, when reservoir is well filled the holder may be removed and contents disposed of. The legs I2 and i3 are provided with pips 29 which extend over and engage the base 24 of the pad frictionally to maintain it in position against the bottom of the holder, the base being flexed to snap it into position under the pips. An aperture 21 is provided in the base for releasing the pad when it is desired to renew the same. It is obviou that the unit with the exception of the clamps can be punched from a single sheet of metal and folded to shape.
It is apparent from the drawing that I have provided a device of the character described, which can be easily fixed to a horizontal or vertical surface, making it always available when desired. Because of the cleaning features and means for capturing the dust, soiling from dust is practically eliminated. Because of the construction of the device the emery and cleaning pad can be easily removed for replacement purposes and the device itself can be removed from its support for cleaning and other reasons. Because of its small size and method of attachment, it can be placed in out of the way positions under the board when the board is used in a horizontal position or at the lower end of the board when the board is used in a vertical or substantially vertical position.
While I have indicated the preferred embodiments of my invention of which I am now aware and. have also indicated only one specific appli cation for which my invention may be employed, it will be apparent that my invention is by no means limited to the exact forms illustrated or the use indicated, but that many variations may be made in the particular structure used and the purpose for which it is employed without departing from the scope of my invention as set forth in the appended claims.
What I claim as new is:
1. A device for sharpening pencils including a plate member provided with supporting legs at the opposite ends of said plate member, said plate member having means provided with a sharpening surface between said legs, and means cooperating with said legs for securing said plate member to a supporting surface, said last means including a pair of oppositely positioned elements between which said legs are slidably received.
2. A device for sharpening pencils including a plate member provided with supporting legs at the opposite ends of said plate member, said plate member having means provided with a sharpening surface between said legs, and means cooperating with said legs for securing said plate member to a supporting surface, said means including supporting brackets adapted to be secured to a supporting surface and formed to slidably receive the ends of the legs.
3. A device for sharpening pencils including a plate member provided with supporting legs at the opposite ends of said plate member, said plate member having means provided with a sharpening surface between said legs, and means cooperating with said legs for securing said plate member to a supporting surface, said means including supporting brackets adapted to be secured to a supporting surface and formed to slidably receive the ends of the legs between the plate and the supporting surface, and a trough provided along one edge of the plate to receive dust formed during the pointing operation.
4. A device for sharpening pencils including a plate member provided with supporting legs at the opposite ends of said plate member, said plate member supporting a removable pad having a sharpening surface between said legs, and means cooperating with said legs for securing said plate member to a supporting surface, said means including supporting brackets adapted to be secured to a supporting surface and formed to slidably receive the ends of the legs between the plate and. the supporting surface, and a trough provided along one edge of the plate to receive dust formed during the pointing operation, said sharpening surface including a removable pad.
5. A device for pointing pencils including an elongated plate having legs perpendicularly positioned with respect to said plate at the ends thereof, the ends of said legs being provided with outwardly extending lips parallel to the plate, supporting means for slidably receiving said lips and including brackets to be secured to a supporting surface and formed to provide a space between the brackets and the supporting surface for receiving said lips, .and a pointing means supported on said plate between said legs.
6. A device for pointing pencils including an elongated plate having legs perpendicularly positioned with respect to said plate at the ends thereof, the ends of said legs being provided with outwardly extending lips parallel to the plate, supporting means for slidably receiving said lips and including brackets to be secured to a supporting surface and formed to provide a space between the brackets and the supporting surface for receiving said lips, and a pointing means supported on said plate between said legs and including a pad having a sharpening surface and a cleaning surface, a back plate opposite said through and cooperating with said legs for closing the back of the elongated plate and legs.
'7. A device for pointing pencils including an elongated plate having legs perpendicularly positioned with respect to said plate at the ends thereof, the ends of said legs being provided with outwardly extending lips parallel to the plate, supporting means for slidably receiving said lips and including brackets to be secured to a supporting surface and formed to provide a space between the brackets and the supporting surface for receiving said lips, and a pointing pad supported on said plate between said legs, a back plate opposite said trough and cooperating with said legs for closing the back of the elongated plate and legs, said base being inclined with respect to said back plate for retaining the pointing pad in place.
8. A device for pointing pencils including an elongated plate having legs perpendicularly positioned with respect to said plate at the ends thereof, the ends of said legs being provided with outwardly extending lips parallel to the plate, supporting means for slidably receiving said lips and including brackets to be secured to a supporting surface and formed to provide a space between the brackets and the supporting surface for receiving said lips, and a pointing pad supported on said plate between said legs, a back plate opposite said trough and cooperating with said legs for closing the back of the elongated plate and legs, said base being inclined with respect to said back plate for retaining the pointing pad in place, and extensions on said back plate for reception by said supporting means when said device is to be supported in a vertical position.
9. A device for pointing pencils including an elongated plate having legs perpendicularly positioned with respect to said plate at the ends thereof, the ends of said legs being provided With outwardly extending lips parallel to the plate, supporting means for slidably receiving said lips and including brackets to be secured to a supporting surface and formed to provide a Space between the brackets and the supporting surface for receiving said lips, and a pointing pad supported on said plate between said legs, a back plate opposite said trough and cooperating with said legs for closing the back of the elongated plate and legs, and extensions on said back plate for reception by said supporting means when said device is to be supported in a vertical position.
10. A device for pointing pencils including an elongated plate having legs perpendicularly positioned with respect to said plate at the ends thereof, the ends of said legs being provided with outwardly extending lips parallel to the plate, supporting means for slidably receiving said lips and including brackets to be secured to a supporting surface and formed to provide a space between the brackets and the supporting surface for receiving said lips, and a pointing pad supported on said plate between said legs, a back plate opposite said trough and cooperating with said legs for closing the back of the elongated plate and legs, and extensions on said back plate for reception by said supporting means when said device is to be supported in a vertical position, said legs having pips to frictionally engage the pointing pad to retain it in place.
11. A device for pointing pencils including an elongated plate having legs perpendicularly positioned with respect to said plate at the ends thereof, the ends of said legs being provided with outwardly extending lips parallel to the plate, supporting means for slidably receiving said lips and including brackets to be secured to a supporting surface and formed to provide a space between the brackets and the supporting surface for receiving said lips, and a pointing pad supported on said plate between said legs and including a sharpening surface and a cleaning surface, a back plate opposite said trough and cooperating with said legs for closing the back of the plate and legs, said elongated plate being wider adjacent said back plate for retaining the pointing pad in place, and extensions on said back plate for reception by said supporting means when said device is to be supported in a vertical position, said elongated plate having an aperture in the bottom thereof to permit ready removal of said sharpening pad.
12. A device for pointing pencils including an elongated plate having legs perpendicularly positioned with respect to said plate at the ends thereof, the ends of said legs being provided with outwardly extending lips parallel to the plate, supporting means for slidably receiving said lips and including brackets to be secured to a supporting surface and formed to provide a space between the brackets and the supporting surface for receiving said lips, and a pointing pad supported on said plate between said legs and including a sharpening surface and a cleaning surface, a back plate opposite said trough and cooperating with said legs for closing the back of the plate and legs, said elongated plate being wider adjacent said back plate for retaining the pointing pad in place, and extensions on said back plate for reception by said supporting means when said device is to be supported in a vertical position, said legs having pips to frictionally engage the sharpening pad to retain it in place, said elongated plate having an aperture in the bottom thereof to permit ready removal of said sharpening pad.
EDMUND J. LADA.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US400743A US2288407A (en) | 1941-07-02 | 1941-07-02 | Pencil pointer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US400743A US2288407A (en) | 1941-07-02 | 1941-07-02 | Pencil pointer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2288407A true US2288407A (en) | 1942-06-30 |
Family
ID=23584820
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US400743A Expired - Lifetime US2288407A (en) | 1941-07-02 | 1941-07-02 | Pencil pointer |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US2288407A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2440813A (en) * | 1945-07-12 | 1948-05-04 | Turchen Herman | Mechanical sandblock for sharpening pencils |
| US2518401A (en) * | 1945-03-02 | 1950-08-08 | Thompson Willie May | Draftsman's instrument rack |
| US2716964A (en) * | 1954-08-16 | 1955-09-06 | Middleton J Tackaberry | Pencil pointer |
| US2848729A (en) * | 1955-03-09 | 1958-08-26 | Michael A Guarino | Pencil point cleaner |
| US2923020A (en) * | 1957-10-10 | 1960-02-02 | Fluster Alfred | Pencil point cleaning device |
| US2989947A (en) * | 1958-07-31 | 1961-06-27 | Osmundsen Arnold | Lead pointing machine |
| US4558540A (en) * | 1983-01-28 | 1985-12-17 | Collins Walter W | Knife sharpener |
| US20180290266A1 (en) * | 2017-04-07 | 2018-10-11 | Cynthia B. Leiseca | Dental Tool Sharpening Fixture Adapter |
-
1941
- 1941-07-02 US US400743A patent/US2288407A/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2518401A (en) * | 1945-03-02 | 1950-08-08 | Thompson Willie May | Draftsman's instrument rack |
| US2440813A (en) * | 1945-07-12 | 1948-05-04 | Turchen Herman | Mechanical sandblock for sharpening pencils |
| US2716964A (en) * | 1954-08-16 | 1955-09-06 | Middleton J Tackaberry | Pencil pointer |
| US2848729A (en) * | 1955-03-09 | 1958-08-26 | Michael A Guarino | Pencil point cleaner |
| US2923020A (en) * | 1957-10-10 | 1960-02-02 | Fluster Alfred | Pencil point cleaning device |
| US2989947A (en) * | 1958-07-31 | 1961-06-27 | Osmundsen Arnold | Lead pointing machine |
| US4558540A (en) * | 1983-01-28 | 1985-12-17 | Collins Walter W | Knife sharpener |
| US20180290266A1 (en) * | 2017-04-07 | 2018-10-11 | Cynthia B. Leiseca | Dental Tool Sharpening Fixture Adapter |
| US10105823B1 (en) * | 2017-04-07 | 2018-10-23 | Cynthia B. Leiseca | Dental tool sharpening fixture adapter |
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