GB655705A - Improvements in or relating to the cutting and polishing of diamonds - Google Patents

Improvements in or relating to the cutting and polishing of diamonds

Info

Publication number
GB655705A
GB655705A GB2552248A GB2552248A GB655705A GB 655705 A GB655705 A GB 655705A GB 2552248 A GB2552248 A GB 2552248A GB 2552248 A GB2552248 A GB 2552248A GB 655705 A GB655705 A GB 655705A
Authority
GB
United Kingdom
Prior art keywords
diamond
lap
cutting
diamonds
grooves
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
Application number
GB2552248A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to GB2552248A priority Critical patent/GB655705A/en
Publication of GB655705A publication Critical patent/GB655705A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D5/00—Fine working of gems, jewels, crystals, e.g. of semiconductor material; apparatus or devices therefor
    • B28D5/02—Fine working of gems, jewels, crystals, e.g. of semiconductor material; apparatus or devices therefor by rotary tools, e.g. drills
    • B28D5/022—Fine working of gems, jewels, crystals, e.g. of semiconductor material; apparatus or devices therefor by rotary tools, e.g. drills by cutting with discs or wheels
    • B28D5/024—Fine working of gems, jewels, crystals, e.g. of semiconductor material; apparatus or devices therefor by rotary tools, e.g. drills by cutting with discs or wheels with the stock carried by a movable support for feeding stock into engagement with the cutting blade, e.g. stock carried by a pivoted arm or a carriage
    • B28D5/025—Fine working of gems, jewels, crystals, e.g. of semiconductor material; apparatus or devices therefor by rotary tools, e.g. drills by cutting with discs or wheels with the stock carried by a movable support for feeding stock into engagement with the cutting blade, e.g. stock carried by a pivoted arm or a carriage with the stock carried by a pivoted arm
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Abstract

655,705. Cutting and polishing diamonds. NAGY, A. Sept 30, 1948, No. 25522. [Class 60] [Also in Group VII] A method of cutting and polishing diamonds comprises subjecting the diamond to profile grinding with a lap coated with diamond abrasive so as to form thereon at least two faces simultaneously.' The lap is of cast iron and, in its simplest form, has a V-shaped periphery which may be used for cutting initials in a flat surface of a diamond. A multi-ribbed lap 10,. Fig. 1, may be used to cut a series of parallel V-grooves 14, the diamond being reciprocated during this process. A second set of V-grooves may be added at right angles to the first to produce the pattern shown in Fig. 2. A slice may now be sawn from the diamond along the line A-A and the sawn face of the slice treated in a somewhat similar fashion to produce the pattern of Fig. 3. A machine for carrying out these operations is shown in Fig. 9 in which the lap 10 is rotated by an electric motor, (not shown), and the diamond 12 is mounted in a holder 42 carried by an arm 43 pivotally connected to an arm 45 provided with a counterweight 49. The arm 45 is pivotally connected to a spring-loaded slide 47 reciprocated by an adjustable eccentric 52. The amount of feed of the diamond towards the lap is determined by the setting of a screw 54, and the feed is applied by a screw 54a carrying a ratchet wheel 54b which strikes a fixed pawl 54c on each reciprocation of the slide. A simplified form of this machine is used for making master tools for cutting laps. The grooves of the lap profile need not be straight-sided, and each side of the groove may be constituted by two plane surfaces meeting at an angle or by a curved surface. Laps rotating about an axis normal to the surface to be treated are used to produce a pattern of intersecting arcuate grooves of rectangular cross-section. The faces or the apex of a pyramid may also be treated by the method according to the invention, and diamonds may also be shaped into the outline of a cross, a heart, a star and the like. Various patterns are described, some of which are formed by a number of diamonds. ground to fit together. Specifications 541,451 and 613,072 are referred to.
GB2552248A 1948-09-30 1948-09-30 Improvements in or relating to the cutting and polishing of diamonds Expired GB655705A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2552248A GB655705A (en) 1948-09-30 1948-09-30 Improvements in or relating to the cutting and polishing of diamonds

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2552248A GB655705A (en) 1948-09-30 1948-09-30 Improvements in or relating to the cutting and polishing of diamonds

Publications (1)

Publication Number Publication Date
GB655705A true GB655705A (en) 1951-08-01

Family

ID=10229048

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2552248A Expired GB655705A (en) 1948-09-30 1948-09-30 Improvements in or relating to the cutting and polishing of diamonds

Country Status (1)

Country Link
GB (1) GB655705A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0068312A1 (en) * 1981-06-19 1983-01-05 Sanyo Electric Co., Ltd. Keel-tipped stylus, and method and device for making keel-tipped stylus
GB2533182A (en) * 2014-12-08 2016-06-15 Crystal Clear Jewellery Ltd Translucent stone cluster effect articles

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0068312A1 (en) * 1981-06-19 1983-01-05 Sanyo Electric Co., Ltd. Keel-tipped stylus, and method and device for making keel-tipped stylus
GB2533182A (en) * 2014-12-08 2016-06-15 Crystal Clear Jewellery Ltd Translucent stone cluster effect articles
WO2016092288A1 (en) * 2014-12-08 2016-06-16 Crystal Clear Jewellery Ltd Translucent stone cluster effect articles
GB2535292A (en) * 2014-12-08 2016-08-17 Crystal Clear Jewellery Ltd Translucent stone cluster effect articles

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