US2735246A - Lapidary template and dop-stick - Google Patents
Lapidary template and dop-stick Download PDFInfo
- Publication number
- US2735246A US2735246A US2735246DA US2735246A US 2735246 A US2735246 A US 2735246A US 2735246D A US2735246D A US 2735246DA US 2735246 A US2735246 A US 2735246A
- Authority
- US
- United States
- Prior art keywords
- template
- dop
- stick
- flange
- lapidary
- 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
- 239000010437 gem Substances 0.000 description 16
- 238000005296 abrasive Methods 0.000 description 10
- 229910001751 gemstone Inorganic materials 0.000 description 10
- 239000000463 material Substances 0.000 description 6
- 230000023298 conjugation with cellular fusion Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000013011 mating Effects 0.000 description 4
- 230000021037 unidirectional conjugation Effects 0.000 description 4
- 230000037250 Clearance Effects 0.000 description 2
- 210000002105 Tongue Anatomy 0.000 description 2
- 229910001315 Tool steel Inorganic materials 0.000 description 2
- UONOETXJSWQNOL-UHFFFAOYSA-N Tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 230000001070 adhesive Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 2
- 230000035512 clearance Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000004301 light adaptation Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 230000002441 reversible Effects 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
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
- B24B9/00—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor
- B24B9/02—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground
- B24B9/06—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain
- B24B9/16—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of diamonds; of jewels or the like; Diamond grinders' dops; Dop holders or tongs
- B24B9/161—Dops, dop holders
Definitions
- One of the objects of the present invention is to provide an improved and simplified lapidary template and dopstick arrangement in which a minimum number of templates are required while being able to get a maximum number of sizes and facets formed on the gem to be ground.
- Still another object of this invention is to provide a reversible template and dop-stick assembly for grinding various sizes of jewels and the like from a single template.
- Still another object of this invention is to provide a detachable handle for the template and gem-holding portion of the dop-stick assembly.
- Still another object of this invention is to provide an improved securing means for the template on a dop-stick.
- Fig. l is a general assembly partly in section of a combined lapidary template and dop-stiek incorporating the features of this invention shown applied to an abrasive wheel.
- Fig. 2 is a fragmentary end view of the assembly shown in Fig. 1 showing a second form of holding the work to the template shown applied to an abrasive wheel.
- Fig. 3 is a view similar to Fig. 2 but showing still another use of the same template for preparing work in still a third size and shape shown applied to an abrasive wheel.
- Fig. 4 is an enlarged sectional view through a typical dop-stick tempalte.
- Fig. 5 is an enlarged fragmentary view of the template supporting end of the dop-stick.
- Fig. 6 is a view on the line 6-6 of Fig. 5.
- Fig. 7 is a diagram showing how two templates can be made from a single conical piece of material capable of taking care of six sizes of work to be lapped.
- Fig. 8 is a bracketed view showing a plurality of various sized and shaped templates usable with the dop-stick of Fig. 1.
- a dop-stick Fig. 1, having the main handle portion 10 on the working end of which is provided a flange 11 having an abutment surface 12 which engages the side faces 13 or 14 of the desired template 15.
- the template 15 may be secured against rotation on the flange 11 by index pins 16 rigidly fixed in the flange 11 which engage in mating clearance holes 17.
- tongues 18 may be formed on the flange 11 projecting above the abutment surface 12 which engage in mating slots 19 formed in the faces 13 and 14 of the template 15.
- a suitable draw rod 20 having an integral knurled head 21 projects through the central bore 22 in the handle 10 and has a threaded end 23 engaging in the threaded bore 24 of the template 15 whereby turning of the knurled knob 21 securely binds the template 15 against the abutment surface 12 of the flange 11 on the handle 10.
- Figs. 1, 2 and 3 that the work such as a stone or jewel W to be finished may be applied in three different positions W1, W2, and W3 by suitable adhesive to the side faces 13 or 14 on the same template 15 to get three difierent sizes of beveling on the finished product.
- Fig. 1 is shown the intermediate position W-1 of a jewel W wherein the large end of the template 15 is facing outwardly but the jewel is beveled inwardly away from the outer edge 25 of the template.
- the jewel W-2 is shown wherein the beveling is done upwardly and outwardly from the edge 25 of the template to get a much larger overall size for the work.
- Fig. 2 is shown the smallest position with the template reversed with its large edge 25 back against the flange and its smaller edge 26 facing outwardly and upon which is mounted the work W-3. In this latter instance the smallest size with the same shape the template will thus be formed.
- Fig. 8 shows various forms the template 15 may take while still producing the three size jewels from the same template as illustrated in Figs. 1, 2, and 3.
- Fig. 7 is a diagram illustrating how a conical piece of metal may be utilized in making various sizes of tapered templates by slicing off various sections at the points 28, 29, 30, 31, and 32 for example. It is also to be noted that with only two sizes of templates, six different sizes of jewels can be easily ground and contoured to precise shape.
- the template material is made of hard tool steel, or other types of tungsten carbide materials to resist abrasion from the polishing or abrasive wheels P while at the same time making it possible to lap the work subject closely to or exactly up against the desired template shape.
- a lapidary template and dop-stick assembly including a handle, a flange formed on one end of said handle having an abutment surface, a beveled abrasive wheel engaging template having a large edge and a smaller edge, means for mounting said template with either said large edge or small edge adjacent said abutment surface on said flange, means inter-engaging between said flange and said template to prevent rotation of said template on said flange and handle, and clamping means for securing said template to said abutment surface on said flange, said means including a draw bar extending through a central bore in said handle, a threaded end on the outer end of said draw bar engaging a threaded bore in said template, and a knurled knob on the opposite end of said draw bar at the rear end of said handle operable to clamp said template to said flange on said handle.
- a lapidary template and dop-stick assembly including a handle, a flange having an abutment surface thereon, a draw bar rotatable in a central bore in said handle, a knurled knob fixed on the outer end of said draw bar, a threaded end on the inner end of said draw bar engaging in a threaded bore in a template to be secured to said flange, and tongue-and-groove means between said flange and said template to prevent rotation of said template on said flange and handle.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Description
Feb. 21, 1956 F. w. PONTING LAPIDARY TEMPLATE AND DOPSTICK Filed Feb. 24, 1953 'INVENTOR. F250 W Pour/ms United States Patent 2,735,246 LAPIDARY TEMPLATE AND BOP-SEEK Fred W. Ponting, Phoenix, Ariz. Application February 24, 1953, Serial No. 338,325 2 Claims. (Cl. 51-229) This invention pertains to improvements in a lapidary template and dop-stick.
One of the objects of the present invention is to provide an improved and simplified lapidary template and dopstick arrangement in which a minimum number of templates are required while being able to get a maximum number of sizes and facets formed on the gem to be ground.
Still another object of this invention is to provide a reversible template and dop-stick assembly for grinding various sizes of jewels and the like from a single template.
Still another object of this invention is to provide a detachable handle for the template and gem-holding portion of the dop-stick assembly.
Still another object of this invention is to provide an improved securing means for the template on a dop-stick.
Further features and advantages will appear from a detailed description of the drawings in which:
Fig. l is a general assembly partly in section of a combined lapidary template and dop-stiek incorporating the features of this invention shown applied to an abrasive wheel.
Fig. 2 is a fragmentary end view of the assembly shown in Fig. 1 showing a second form of holding the work to the template shown applied to an abrasive wheel.
Fig. 3 is a view similar to Fig. 2 but showing still another use of the same template for preparing work in still a third size and shape shown applied to an abrasive wheel.
Fig. 4 is an enlarged sectional view through a typical dop-stick tempalte.
Fig. 5 is an enlarged fragmentary view of the template supporting end of the dop-stick.
Fig. 6 is a view on the line 6-6 of Fig. 5.
Fig. 7 is a diagram showing how two templates can be made from a single conical piece of material capable of taking care of six sizes of work to be lapped.
Fig. 8 is a bracketed view showing a plurality of various sized and shaped templates usable with the dop-stick of Fig. 1.
As illustrative of one embodiment of this invention there is shown a dop-stick, Fig. 1, having the main handle portion 10 on the working end of which is provided a flange 11 having an abutment surface 12 which engages the side faces 13 or 14 of the desired template 15. The template 15 may be secured against rotation on the flange 11 by index pins 16 rigidly fixed in the flange 11 which engage in mating clearance holes 17. As an alternative construction tongues 18 may be formed on the flange 11 projecting above the abutment surface 12 which engage in mating slots 19 formed in the faces 13 and 14 of the template 15.
A suitable draw rod 20 having an integral knurled head 21 projects through the central bore 22 in the handle 10 and has a threaded end 23 engaging in the threaded bore 24 of the template 15 whereby turning of the knurled knob 21 securely binds the template 15 against the abutment surface 12 of the flange 11 on the handle 10.
It is important to note, Figs. 1, 2 and 3, that the work such as a stone or jewel W to be finished may be applied in three different positions W1, W2, and W3 by suitable adhesive to the side faces 13 or 14 on the same template 15 to get three difierent sizes of beveling on the finished product.
In Fig. 1 is shown the intermediate position W-1 of a jewel W wherein the large end of the template 15 is facing outwardly but the jewel is beveled inwardly away from the outer edge 25 of the template. Similarly, in Fig. 3 the jewel W-2 is shown wherein the beveling is done upwardly and outwardly from the edge 25 of the template to get a much larger overall size for the work. In Fig. 2 is shown the smallest position with the template reversed with its large edge 25 back against the flange and its smaller edge 26 facing outwardly and upon which is mounted the work W-3. In this latter instance the smallest size with the same shape the template will thus be formed.
Fig. 8 shows various forms the template 15 may take while still producing the three size jewels from the same template as illustrated in Figs. 1, 2, and 3.
Fig. 7 is a diagram illustrating how a conical piece of metal may be utilized in making various sizes of tapered templates by slicing off various sections at the points 28, 29, 30, 31, and 32 for example. It is also to be noted that with only two sizes of templates, six different sizes of jewels can be easily ground and contoured to precise shape. Preferably the template material is made of hard tool steel, or other types of tungsten carbide materials to resist abrasion from the polishing or abrasive wheels P while at the same time making it possible to lap the work subject closely to or exactly up against the desired template shape.
While the apparatus herein disclosed and described constitutes a preferred form of the invention, it is also to be understood that the apparatus is capable of mechanical alteration without departing from the spirit of the invention and that such mechanical arrangement and commercial adaptation as fall within the scope of the appendant claims are intended to be included herein.
Having thus fully set forth and described this invention what is claimed and desired to be obtained by United States Letters Patent is:
1. In a lapidary template and dop-stick assembly including a handle, a flange formed on one end of said handle having an abutment surface, a beveled abrasive wheel engaging template having a large edge and a smaller edge, means for mounting said template with either said large edge or small edge adjacent said abutment surface on said flange, means inter-engaging between said flange and said template to prevent rotation of said template on said flange and handle, and clamping means for securing said template to said abutment surface on said flange, said means including a draw bar extending through a central bore in said handle, a threaded end on the outer end of said draw bar engaging a threaded bore in said template, and a knurled knob on the opposite end of said draw bar at the rear end of said handle operable to clamp said template to said flange on said handle.
2. In a lapidary template and dop-stick assembly including a handle, a flange having an abutment surface thereon, a draw bar rotatable in a central bore in said handle, a knurled knob fixed on the outer end of said draw bar, a threaded end on the inner end of said draw bar engaging in a threaded bore in a template to be secured to said flange, and tongue-and-groove means between said flange and said template to prevent rotation of said template on said flange and handle.
References Cited in the file of this patent UNITED STATES PATENTS 109,008 Hill Nov. 8, 1870 633,571 Crocker Sept. 26, 1899 1,643,978 Bugbee Oct. 4, 1927 1,940,107 Stichler Dec. 19, 1933 2,293,641 Dinhofer Aug. 18, 1942 2,668,400 Bacchi Feb. 9, 1954 FOREIGN PATENTS 74,249 Switzerland Feb. 1, 1917 485,937 Germany Nov. 6, 1929
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2735246A true US2735246A (en) | 1956-02-21 |
Family
ID=3444658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US2735246D Expired - Lifetime US2735246A (en) | Lapidary template and dop-stick |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US2735246A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3323259A (en) * | 1964-10-28 | 1967-06-06 | Glenn M Stout | Dop stick |
| US3861090A (en) * | 1973-08-03 | 1975-01-21 | Alphonse J Lattauzio | Method of using a lapidary machine |
| US4201018A (en) * | 1978-10-23 | 1980-05-06 | Clarence Pool | Cabbing device for gemstones |
| US4873794A (en) * | 1986-05-21 | 1989-10-17 | The United States Of America As Represented By The Secretary Of The Air Force | Holder for milling countersink filler plugs |
| US20080085666A1 (en) * | 2006-10-10 | 2008-04-10 | Steven James Lindsay | Hand engraving sharpening device |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US109008A (en) * | 1870-11-08 | Improvement in box-scrapers | ||
| US633571A (en) * | 1899-06-08 | 1899-09-26 | Francis H Crocker | Cabinet-scraper. |
| CH74249A (en) * | 1916-05-30 | 1917-02-01 | Charles Vacheresse | Scraper with attached blade |
| US1643978A (en) * | 1925-12-08 | 1927-10-04 | Continental Optical Corp | Lens block |
| DE485937C (en) * | 1928-04-03 | 1929-11-06 | Moritz Harnisch | Swiveling around an axis perpendicular to the workpiece spindle axis and adjustable according to a scale double holder on machines for grinding the facets of real and fake gemstones |
| US1940107A (en) * | 1932-01-11 | 1933-12-19 | Stichler Charles | Scraper |
| US2293641A (en) * | 1942-03-31 | 1942-08-18 | Dinhofer Julius | Diamond holder |
| US2668400A (en) * | 1952-02-23 | 1954-02-09 | Eugene A Bacchi | Lapidary tool |
-
0
- US US2735246D patent/US2735246A/en not_active Expired - Lifetime
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US109008A (en) * | 1870-11-08 | Improvement in box-scrapers | ||
| US633571A (en) * | 1899-06-08 | 1899-09-26 | Francis H Crocker | Cabinet-scraper. |
| CH74249A (en) * | 1916-05-30 | 1917-02-01 | Charles Vacheresse | Scraper with attached blade |
| US1643978A (en) * | 1925-12-08 | 1927-10-04 | Continental Optical Corp | Lens block |
| DE485937C (en) * | 1928-04-03 | 1929-11-06 | Moritz Harnisch | Swiveling around an axis perpendicular to the workpiece spindle axis and adjustable according to a scale double holder on machines for grinding the facets of real and fake gemstones |
| US1940107A (en) * | 1932-01-11 | 1933-12-19 | Stichler Charles | Scraper |
| US2293641A (en) * | 1942-03-31 | 1942-08-18 | Dinhofer Julius | Diamond holder |
| US2668400A (en) * | 1952-02-23 | 1954-02-09 | Eugene A Bacchi | Lapidary tool |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3323259A (en) * | 1964-10-28 | 1967-06-06 | Glenn M Stout | Dop stick |
| US3861090A (en) * | 1973-08-03 | 1975-01-21 | Alphonse J Lattauzio | Method of using a lapidary machine |
| US4201018A (en) * | 1978-10-23 | 1980-05-06 | Clarence Pool | Cabbing device for gemstones |
| US4873794A (en) * | 1986-05-21 | 1989-10-17 | The United States Of America As Represented By The Secretary Of The Air Force | Holder for milling countersink filler plugs |
| US20080085666A1 (en) * | 2006-10-10 | 2008-04-10 | Steven James Lindsay | Hand engraving sharpening device |
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