Precious Stone Working Patents (Class 125/30.01)
-
Publication number: 20110146349Abstract: The invention relates to a gemstone (10) comprises a girdle (13), a crown (11) and a pavilion (12). The crown has a table (14), ten star facets (15) surrounding the table, ten bezel facets (16) aligned between the star facets and twenty upper girdle facets (20) aligned between the bezel facets. The pavilion is provided with ten pavilion main facets (24), twenty pavilion hook facets (29) aligned between the pavilion main facets and ten pavilion star facets (34) aligned between the pavilion hook facets. The invention also relates to a method of cutting the gemstone.Type: ApplicationFiled: November 29, 2010Publication date: June 23, 2011Inventor: Paras Paresh Mehta
-
Publication number: 20110146350Abstract: The invention relates to a gemstone (10) comprises a girdle (13), a crown (11) and a pavilion (12). The crown (11) comprises a table (14), eight star facets (15) surrounding the table (14), eight first half facets (16) aligned between the star facets (15), eight second half facets (17) aligned adjacent to the first half facets (16) and sixteen upper girdle facets (20) aligned between the second half facets (17). The pavilion (12) comprises sixteen pavilion main facets (23) and sixteen lower girdle facets (25) aligned between the pavilion main facets (23). The invention also relates to a method of cutting the gemstone.Type: ApplicationFiled: December 6, 2010Publication date: June 23, 2011Inventor: Alain Vets
-
Publication number: 20110126815Abstract: The present invention protects opals during processing from rhyolite nodules. An opal containing rhyolite nodule is soaked in a heated polyester resin, styrene (100-42-5) solution for 24 hours per 10 grams of nodule. The rhyolite nodule is dried and sawed into slabs, which are soaked in a heated polyester resin, styrene (100-42-5) solution. The soaked slabs are cut into pieces, cabochons are marked out, and the pieces are rough cut into pre forms. The pre forms are soaked in a heated polyester resin, styrene (100-42-5) solution, beneficially for 24 hours. The pre forms are dried and cut into cabochons, which are soaked (preferably for 24 hours) in a heated polyester resin, styrene (100-42-5) solution. The soaked cabochons are then dried, polished, and air cured.Type: ApplicationFiled: November 30, 2010Publication date: June 2, 2011Inventor: THOMAS C. SHOPE, JR.
-
Publication number: 20110036339Abstract: A system for cutting a plurality of substrates of integrated circuit units comprising a plurality of tables (40, 55), each table including a plurality of trays (37A, 37B, 57A, 57B), each tray arranged to receive one of said substrates; each of said tables selectively movable between a respective loading station (20) for receiving said substrates and a cutting station for cutting the substrates, and a substrate placement device (35) for placing the substrates on the respective trays of said tables; wherein the substrate placement device is arranged to sequentially place substrates on said tables with said tables arranged to sequentially move to the cutting station after receiving the substrates and then return to their respective loading stations for placement of additional substrates.Type: ApplicationFiled: May 4, 2009Publication date: February 17, 2011Inventors: Jong Jae Jung, Deok Chun Jang, Chang Hwan Ha, Chong Chen Lim, Seung Ho Baek
-
Publication number: 20100282234Abstract: An ornamental diamond is provided as an extremely bright diamond with numerous reflection patterns when viewed from above its table facet and crown facets. The diamond has the same crown as the round brilliant cut and its pavilion consists of a first pavilion and a second pavilion separated by a horizontal division plane. The second pavilion is an octagonal pyramid and its side faces form second pavilion main facets. The first pavilion is a hexadecagonal frustum with a top face on the horizontal division plane and its side faces form first lower girdle facets. First pavilion main facets extend from the girdle and between the first lower girdle facets, into between the second pavilion main facets. The ornamental diamond having the two-stage pavilion is much more brilliant than and has twice as many reflection patterns as the conventional round brilliant cut.Type: ApplicationFiled: January 9, 2008Publication date: November 11, 2010Applicant: HOHOEMI BRAINS, INC.Inventors: Tamotsu Matsumura, Yoshinori Kawabuchi, Akira Itoh
-
Publication number: 20100154473Abstract: The present invention discloses a round brilliant cut diamond. The diamond includes a crown, a girdle, and a pavilion, the cut crown includes one regular octagon table, eight first facets, eight second facets, and sixteen third facets, wherein the cut pavilion has sixteen quadrangular fourth facets, sixteen quadrangular fifth facets, and sixteen sub-triangular sixth facets. The sixteen fourth facets meet at a point, which forms an apex, and each fourth facet, fifth facet and sixth facet meet a point. A depth of the fourth facets is smaller than 21.6% of the total girdle diameter D. The present invention also discloses methods for preparing above mentioned round brilliant-cut diamond.Type: ApplicationFiled: February 26, 2010Publication date: June 24, 2010Inventor: Xiben Xheng
-
Publication number: 20100059034Abstract: A method of producing gemstones includes obtaining a plate of chemical vapor deposition formed diamond. The plate is cut into a plurality of geometrically optimized preforms. The preforms may be finished and cut into diamond gemstones.Type: ApplicationFiled: May 8, 2009Publication date: March 11, 2010Applicant: Apollo Diamond Gemstone CorporationInventors: Robert C. Linares, Patrick J. Doering
-
Publication number: 20100000507Abstract: A cut gemstone has one or more backside grooves cut into backside facets to form sub facets that operate to increase the brilliance of the cut gemstone.Type: ApplicationFiled: May 8, 2009Publication date: January 7, 2010Applicant: Apollo Diamond Gemstone CorporationInventors: Robert C. Linares, Patrick J. Doering
-
Publication number: 20090320820Abstract: A gemstone drill is of the drill press type which includes a motor suspended and slidably affixed between upstanding vertical telescoping rods. A drill bit is affixed to a spindle which is a direct extension of the motor shaft which is in parallel alignment with the rods. A body of the motor includes a cylindrical spindle housing extending downwardly from the bottom of the motor body adjacent the drill bit. The rods are extensible from tower sleeves mounted directly to a base which has a top support surface enclosed by a transparent containment cover. The door is moveable between open and closed positions to gain access to a clamping mechanism releasably attached to the support surface that holds the stone to be drilled. The containment cover, when closed, includes a circular aperture at the top which closely receives the spindle housing.Type: ApplicationFiled: June 25, 2008Publication date: December 31, 2009Inventor: John J. Sinisi
-
Patent number: 7510462Abstract: In one embodiment, a cutting tool assembly used for creating grooves in a microreplication tool is described. The cutting tool assembly includes a mounting structure and multiple diamonds mounted in the mounting structure. For example, first and second tool shanks having first and second diamond tips can be positioned in the mounting structure such that a cutting location of a diamond cutting tip of the first tool shank is a defined distance from a cutting location of a diamond cutting tip of the second tool shank. The defined distance may correspond to an integer number of pitch spacings, and may be accurate to within a tolerance of less than approximately 10 microns.Type: GrantFiled: June 16, 2006Date of Patent: March 31, 2009Assignee: 3M Innovative Properties CompanyInventors: William J. Bryan, Nelson D. Sewall, Jeffrey E. Clements, Greg E. Schrank, Jennifer L. Trice, Timothy L. Hoopman, Charles N. DeVore
-
Publication number: 20090038341Abstract: The present invention discloses a round brilliant cut diamond. The diamond includes a crown, a girdle, and a pavilion, the cut crown includes one regular octagon table, eight first facets, eight second facets, and sixteen third facets, wherein the cut pavilion has sixteen quadrangular fourth facets, sixteen quadrangular fifth facets, and sixteen sub-triangular sixth facets. The sixteen fourth facets meet at a point, which forms an apex, and each fourth facet, fifth facet and sixth facet meet a point. The present invention also discloses methods for preparing above mentioned round brilliant-cut diamond.Type: ApplicationFiled: September 9, 2004Publication date: February 12, 2009Inventor: Xiben Zheng
-
Patent number: 7431632Abstract: A control system for controlling processing of workpieces such as jewelry has gantry and gimbal units having x, y, z translational and x, y, z rotational degrees of freedom, the units carrying a gripper for holding a piece of jewelry. Drive motors are associated with each translational and rotational degree of freedom and an actuator operates the gripper. A controller is linked to the gantry and gimbal unit motors, the gripper unit actuator, and actuators associated with a series of work stations for carrying out processing operations such as lapping and grinding. The controller controls movement of the gripper unit from a start position to pick up a workpiece and move it along a programmed path between the processing stations, and controls operation of actuators at each processing station to process workpieces according to stored program instructions. A user input device provides optional operator control of the movement and processing for system training purposes.Type: GrantFiled: October 5, 2007Date of Patent: October 7, 2008Assignee: Control Systems Technologies LLCInventor: Vojislav Kalanovic
-
Publication number: 20080190139Abstract: The invention concerns a precious, semi-precious or mineral cut stone, comprising a crown (1) including in its center a planar table (2) surrounded with several facets of the crown (3-5), a pavilion (6) comprising a pointed culet (8) and several pavilion facets (9-12 and 17), and between the crown (1) and the pavilion (6), a girdle (7). The invention is characterized in that said pavilion facets comprise at least one top facet (9-12) extending between said pointed culet (8) and an intermediate location (13-16) between the girdle (7) and the culet (8).Type: ApplicationFiled: May 19, 2006Publication date: August 14, 2008Inventors: Takehiko Sato, Misuzu Koganei, Hiroyuki Koganei
-
Patent number: 7323156Abstract: The present invention is directed to a method for changing the color of colored natural diamonds. The method includes placing a discolored natural diamond in a pressure-transmitting medium which is consolidated into a pill. Next, the pill is placed into a high pressure/high temperature (HP/HT) press at elevated pressure and elevated temperature for a time sufficient to improve the color of the diamond. The diamond may be exposed at elevated-pressure and elevated-temperature conditions within the graphite-stable region of the carbon-phase diagram—without significant graphitization of the diamond, or above the diamond-graphite equilibrium and within the diamond-stable region of the carbon-phase diagram. Finally, the diamond is recovered from said press. Colorless Type Ia and Type II diamonds may be made by this method.Type: GrantFiled: December 15, 2003Date of Patent: January 29, 2008Assignee: Bellataire International, LLCInventors: Suresh Shankarappa Vagarali, Steven William Webb, William Edwin Jackson, William Frank Banholzer, Thomas Richard Anthony, George Rene Kaplan
-
Patent number: 7300333Abstract: A control system for controlling processing of workpieces such as jewelry has gantry and gimbal units having x, y, z translational and x, y, z rotational degrees of freedom, the units carrying a gripper for holding a piece of jewelry. Drive motors are associated with each translational and rotational degree of freedom and an actuator operates the gripper. A controller is linked to the gantry and gimbal unit motors, the gripper unit actuator, and actuators associated with a series of work stations for carrying out processing operations such as lapping and grinding. The controller controls movement of the gripper unit from a start position to pick up a workpiece and move it along a programmed path between the processing stations, and controls operation of actuators at each processing station to process workpieces according to stored program instructions. A user input device provides optional operator control of the movement and processing for system training purposes.Type: GrantFiled: May 30, 2007Date of Patent: November 27, 2007Assignee: Control Systems Technologies, LLCInventor: Vojislav Kalanovic
-
Patent number: 7241200Abstract: A control system for controlling processing of workpieces such as jewelry has gantry and gimbal units having x, y, z translational and x, y, z rotational degrees of freedom, the units carrying a gripper for holding a piece of jewelry. Drive motors are associated with each translational and rotational degree of freedom and an actuator operates the gripper. A controller is linked to the gantry and gimbal unit motors, the gripper unit actuator, and actuators associated with a series of work stations for carrying out processing operations such as lapping and grinding. The controller controls movement of the gripper unit from a start position to pick up a workpiece and move it along a programmed path between the processing stations, and controls operation of actuators at each processing station to process workpieces according to stored program instructions. A user input device provides optional operator control of the movement and processing for system training purposes.Type: GrantFiled: March 23, 2005Date of Patent: July 10, 2007Assignee: Control Systems Technologies, LLCInventor: Vojislav Kalanovic
-
Patent number: 7228856Abstract: Ten of pavilion main facets are formed with reference to the previously formed five of first pavilion main facets in which an initial first main facet is formed in a position centered on a line shifted approximately fifteen degrees from the ridge of the raw diamond on the pavilion side. Ten of pavilion main facets 19 radiate from the curette 18 and twenty of lower girdle facets are formed between the adjacent pavilion main facets on the pavilion side of the diamond 1.Type: GrantFiled: February 12, 2004Date of Patent: June 12, 2007Assignee: Tokyo Shinzyu Co., Ltd.Inventor: Takeshi Aoyagi
-
Patent number: 7192337Abstract: To provide a diamond rendering reflective light off a table goldenly brilliant by making a proportion thereof symmetrical at any place viewed from an upper face, a side face or a bottom face, a first reference line, a second reference line crossing the first reference lines at a right angle and third reference lines equally dividing segments defined by an intersection of the first reference line and the second reference line into four equal parts, respectively, are provided. A first arc line intersects these reference lines. An approximately regular hexadecagon shaped table is established by line segments defined between these first intersections of the reference lines with the first arc line. Fourth reference lines dividing sectors defined between the third reference lines into two equal parts and a second arc line concentric with and larger than the first arc line, are provided.Type: GrantFiled: February 15, 2006Date of Patent: March 20, 2007Assignee: Diana Sun Diamond Co., Ltd.Inventor: Naotake Shuto
-
Patent number: 7032586Abstract: An improved single point engraving burin tip, for use in hand engraving and stone setting in the hand engraving and jewelry fields. More specifically, the invention provides a single point engraving tip with a secondary relieving area to the primary cutting edge.Type: GrantFiled: February 8, 2005Date of Patent: April 25, 2006Inventor: Steven James Lindsay
-
Patent number: 7004158Abstract: A masonry block that is produced from a workpiece that is split in a block splitting assembly which uses engagement surfaces that are enhanced with, for example, alternating ridges and valleys, preferably in combination with workpiece-engaging projections, to supplement or replace the action of the splitting blade in splitting and dressing the workpiece.Type: GrantFiled: February 14, 2005Date of Patent: February 28, 2006Assignee: Anchor Wall Systems, Inc.Inventors: Ronald J. Scherer, David Matthew LaCroix, Glenn C. Bolles
-
Patent number: 7000607Abstract: A gemstone having a crown, a girdle and a pavilion, wherein the girdle is shaped such that, when viewed in plan view, it is primarily bounded by four pairs of parallel straight edges. Three of the four pairs of edges are spaced by roughly equal spacing D1, while the remaining pair of edges is spaced by a spacing D2, wherein D2 is greater than D1 by between 10% and 40%. Also provided is a method for cutting such a gemstone.Type: GrantFiled: March 2, 2004Date of Patent: February 21, 2006Inventor: Ofer Davidi
-
Patent number: 6918715Abstract: A masonry block that is produced from a workpiece that is split in a block splitting assembly which uses any of a variety of projections to supplement or replace the action of the splitting blade in splitting and dressing the workpiece. The resulting masonry block has features that provide the masonry block with a weathered appearance.Type: GrantFiled: June 19, 2001Date of Patent: July 19, 2005Assignee: Anchor Wall Systems, Inc.Inventors: Ronald J. Scherer, David Matthew LaCroix, Michael J. Hogan, Glenn C. Bolles
-
Patent number: 6915663Abstract: Disclosed is a diamond cutting method comprising the steps of: forming a square or rectangular table in a piece of gemstone; and forming a pavilion continuous to the table by cutting vertically from each side of the square or rectangular table to define the four lower-girdle facets and by cutting obliquely from each corner of the square or rectangular table to the culet of the pavilion to form four lower-main facets, whereby the upper opposite sides of each lower-main facet adjoining the adjacent lower-girdle facets whereas the lower opposite sides of each lower-main facet adjoining the confronting lower opposite sides of the adjacent lower-main facets. An enneahedral-cut diamond thus produced is a table-and-pavilion structure, permitting plural diamonds to be arranged side by side as a whole with their square or rectangular tables directed inward or outward.Type: GrantFiled: August 12, 2004Date of Patent: July 12, 2005Inventor: Naotake Shuto
-
Patent number: 6913009Abstract: Disclosed is a diamond cutting method comprising the steps of: forming a square or rectangular table in a piece of gemstone; and forming a pavilion continuous to the table by cutting vertically from each side of the square or rectangular table to define the four lower-girdle facets and by cutting obliquely from each corner of the square or rectangular table to the culet of the pavilion to form four lower-main facets, whereby the upper opposite sides of each lower-main facet adjoining the adjacent lower-girdle facets whereas the lower opposite sides of each lower-main facet adjoining the confronting lower opposite sides of the adjacent lower-main facets. An enneahedral-cut diamond thus produced is a table-and-pavilion structure, permitting plural diamonds to be arranged side by side as a whole with their square or rectangular tables directed inward or outward.Type: GrantFiled: January 11, 2002Date of Patent: July 5, 2005Inventor: Naotake Shuto
-
Patent number: 6892720Abstract: A method for producing a diamond includes forming a table lying in a table plane; forming crown facets that are oriented at an angle of between 26° and 35° relative to the table plane; forming upper pavilion (UP) facets below the crown facets at an angle of between 45° and 80° relative to a girdle plane lying between bottoms of the crown facets and tops of the UP facets; and forming a set of lower pavilion (LP) facets between bottoms of the UP facets and the culet at an angle of between 38° and 44° relative to the girdle plane. The UP and LP facets form a rib line positioned between one-fifth and four-fifths the distance between the girdle plane and the culet, such that the UP facets extend between 20% and 80% of the distance between the girdle plane and the culet.Type: GrantFiled: April 15, 2003Date of Patent: May 17, 2005Inventors: Michael Schachter, Uri Peleg
-
Patent number: 6881128Abstract: A method of producing ceramics base plates is disclosed, comprising forming a continuous flaw on at least one surface of a ceramics sintered base plate from end to end using a flawing tool and dividing the ceramics sintered base plate along the flaw by applying an external force. It is preferred that a blade edge portion of the flawing tool is made of a cemented carbide or diamond. By the method of the invention, the ceramics sintered base plate can be easily divided, and ceramics base plates excellent in dimensional accuracy are obtained without lowering the strength thereof.Type: GrantFiled: June 29, 1999Date of Patent: April 19, 2005Assignee: Sumitomo Electric Industries, Ltd.Inventors: Masuhiro Natsuhara, Hirohiko Nakata
-
Patent number: 6874494Abstract: A masonry block that is produced from a workpiece that is split in a block splitting assembly which uses engagement surfaces that are enhanced with, for example, alternating ridges and valleys, preferably in combination with workpiece-engaging projections, to supplement or replace the action of the splitting blade in splitting and dressing the workpiece.Type: GrantFiled: March 20, 2002Date of Patent: April 5, 2005Assignee: Anchor Wall Systems, Inc.Inventors: Ronald J. Scherer, David Matthew LaCroix, Glenn C. Bolles
-
Patent number: 6827075Abstract: An automated stone burning apparatus, which precisely adjusts the burning operation and improves the throughput. The apparatus consists of a torch assembly that is mounted in proximity to a stone slab lying upon a roller bed. The torch assembly is movable both transversely and laterally (i.e., in orthogonal directions with respect to the stone slab). An electrical control system adjusts the speed and location of the torch during the burn process.Type: GrantFiled: November 20, 2002Date of Patent: December 7, 2004Inventor: Robert Bellospirito
-
Patent number: 6772748Abstract: A method of forming a stone inlay in an abrasion-sensitive substrate, such as wood, by forming a depression in the substrate, mounting stone on a damping material capable of absorbing the abrasive energy applied to the stone in reducing the dimensions of the stone to fit the depression, cutting the inlay to size and inserting it into the substrate. The cut inlay/damping material composite may be sold separately as an article of manufacture.Type: GrantFiled: September 5, 2002Date of Patent: August 10, 2004Inventor: Sean Cleary
-
Publication number: 20030181147Abstract: A method for producing a diamond includes forming a table lying in a table plane; forming crown facets that are oriented at an angle of between 26° and 35° relative to the table plane; forming upper pavilion (UP) facets below the crown facets at an angle of between 45° and 80° relative to a girdle plane lying between bottoms of the crown facets and tops of the UP facets; and forming a set of lower pavilion (LP) facets between bottoms of the UP facets and the culet at an angle of between 38° and 44° relative to the girdle plane. The UP and LP facets form a rib line positioned between one-fifth and four-fifths the distance between the girdle plane and the culet, such that the UP facets extend between 20% and 80% of the distance between the girdle plane and the culet.Type: ApplicationFiled: April 15, 2003Publication date: September 25, 2003Inventors: Michael Schachter, Uri Peleg
-
Patent number: 6591827Abstract: A method for preparing a diamond having a six-pointed-star shaped girdle comprising: (1) providing a round diamond; and (2) grooving six equally spaced, equally-sized triangularly-shaped 120° angled grooves in the girdle of the round diamond. Also disclosed is a grooving machine comprising a dop, wherein the dop may be rotated between six equally-spaced stops.Type: GrantFiled: June 25, 2001Date of Patent: July 15, 2003Inventor: Roy Fuchs
-
Publication number: 20030070670Abstract: A method of forming a stone inlay in an abrasion-sensitive substrate, such as wood, by forming a depression in the substrate, mounting stone on a damping material capable of absorbing the abrasive energy applied to the stone in reducing the dimensions of the stone to fit the depression, cutting the inlay to size and inserting it into the substrate. The cut inlay/damping material composite may be sold separately as an article of manufacture.Type: ApplicationFiled: October 12, 2001Publication date: April 17, 2003Inventor: Sean Cleary
-
Publication number: 20020195095Abstract: A method for preparing a diamond having a six-pointed-star shaped girdle comprising: (1) providing a round diamond; and (2) grooving six equally spaced, equally-sized triangularly-shaped 120° angled grooves in the girdle of the round diamond. Also disclosed is a grooving machine comprising a dop, wherein the dop may be rotated between six equally-spaced stops.Type: ApplicationFiled: June 25, 2001Publication date: December 26, 2002Inventor: Roy Fuchs
-
Publication number: 20020162356Abstract: A brilliant-cut gemstone having a pavilion, girdle, and crown is disclosed. The pavilion of the gemstone has 56 facets: specifically, 8 lower diamond-shaped facets, 16 middle kite-shaped facets, and 32 upper triangular facets. The girdle and table may be formed of one or more facets. In one preferred embodiment, the total number of crown facets (excluding the table) is 56, making a total of 114 facets (including the table). In another preferred embodiment, the total number of crown facets (excluding the table) is 64, making a total of 122 facets (including the table).Type: ApplicationFiled: February 25, 2002Publication date: November 7, 2002Applicant: Samuel Aaron, Inc.Inventor: Robert J. Wueste
-
Publication number: 20020153000Abstract: The present invention is directed to a surface restoration composition including an organic acid, a metal oxide and a plasticizer. Optionally, dispersants, thickeners and water can be included in the composition. The inventive composition is applied to a stone surface and buffed to dryness to achieve the desired level of gloss.Type: ApplicationFiled: February 11, 2002Publication date: October 24, 2002Inventors: Brian T. Holland, Pablo M. Hernandez
-
Publication number: 20020096167Abstract: Disclosed is a diamond cutting method comprising the steps of: forming a square or rectangular table in a piece of gemstone; and forming a pavilion continuous to the table by cutting vertically from each side of the square or rectangular table to define the four lower-girdle facets and by cutting obliquely from each corner of the square or rectangular table to the culet of the pavilion to form four lower-main facets, whereby the upper opposite sides of each lower-main facet adjoining the adjacent lower-girdle facets whereas the lower opposite sides of each lower-main facet adjoining the confronting lower opposite sides of the adjacent lower-main facets. An enneahedral-cut diamond thus produced is a table-and-pavilion structure, permitting plural diamonds to be arranged side by side as a whole with their square or rectangular tables directed inward or outward.Type: ApplicationFiled: January 11, 2002Publication date: July 25, 2002Inventor: Naotake Shuto
-
Publication number: 20020088450Abstract: Disclosed are a new diamond cutting method and a diamond shape or proportion giving an increased brightness and different brilliant colors to the cut jewel. A piece of diamond having a crown or bezel and a pavilion converging up and down from its girdle is prepared; the table of the crown is cut into a regular polygon having straight sides of an integer multiple of three; star facets, upper-main facets and paired upper-girdle facets are formed on the oblique annular surface between the polygonal table and the girdle; and lower-girdle facets and lower-main facets are cut on the pavilion. The height of the diamond piece is approximately 64% of the diameter of the girdle; the height of the crown is approximately 15.7%; the height of the pavilion is approximately 48.3%; and the largest width of the girdle is approximately 1.2 to 1.4%. The angle formed between the ridge of the crown and the ridge of the pavilion is approximately 77 degrees.Type: ApplicationFiled: March 15, 2002Publication date: July 11, 2002Inventor: Naotake Shuto
-
Patent number: 6397832Abstract: Disclosed are a new diamond cutting method and a diamond shape or proportion giving an increased brightness and different brilliant colors to the cut jewel. A piece of diamond having a crown or bezel and a pavilion converging up and down from its girdle is prepared; the table of the crown is cut into a regular polygon having straight sides of an integer multiple of three; star facets, upper-main facets and paired upper-girdle facets are formed on the oblique annular surface between the polygonal table and the girdle; and lower-girdle facets and lower-main facets are cut on the pavilion. The height of the diamond piece is approximately 64% of the diameter of the girdle; the height of the crown is approximately 15.7%; the height of the pavilion is approximately 48.3%; and the largest width of the girdle is approximately 1.2 to 1.4%. The angle formed between the ridge of the crown and the ridge of the pavilion is approximately 77 degrees.Type: GrantFiled: November 7, 2000Date of Patent: June 4, 2002Inventor: Naotake Shuto
-
Patent number: 6321740Abstract: The invention is a block splitting machine which uses an assortment of protrusions to supplement or replace the action of the splitting blade in splitting and dressing masonry block.Type: GrantFiled: June 11, 1999Date of Patent: November 27, 2001Assignee: Anchor Wall Systems, Inc.Inventors: Ronald James Scherer, David M. LaCroix
-
Publication number: 20010031237Abstract: The present invention is directed to a method for treating discolored natural diamond, especially Type IIa diamond and Type IaA/B diamond with nitrogen as predominantly B centers, for improving its color. The method includes placing a discolored natural diamond in a pressure transmitting medium which is consolidated into a pill. Next, the pill is placed into a high pressure/high temperature (HP/HT) press at elevated pressure and elevated temperature within the graphite stable range of the carbon phase diagram for a time sufficient to improve the color of said diamond. Finally, the diamond is recovered from said press. Colorless diamond can be made by this method.Type: ApplicationFiled: September 28, 1998Publication date: October 18, 2001Inventors: SURESH SHANKARAPPA VAGARALI, STEVEN WILLIAM WEBB, WILLIAM EDWIN JACKSON, WILLIAM FRANK BANHOLZER, THOMAS RICHARD ANTHONY
-
Patent number: 6244262Abstract: A method of forming a decorative shape from a concrete block by cutting the block into a predetermined shaped piece, polishing all flat surfaces and then applying a coating of clear material to the surface of said piece.Type: GrantFiled: December 28, 1999Date of Patent: June 12, 2001Inventor: Robert A. Keck