EP0213166A1 - Machine a cliver - Google Patents

Machine a cliver

Info

Publication number
EP0213166A1
EP0213166A1 EP19860901523 EP86901523A EP0213166A1 EP 0213166 A1 EP0213166 A1 EP 0213166A1 EP 19860901523 EP19860901523 EP 19860901523 EP 86901523 A EP86901523 A EP 86901523A EP 0213166 A1 EP0213166 A1 EP 0213166A1
Authority
EP
European Patent Office
Prior art keywords
stone
diamond
cleaved
piece
holder
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.)
Withdrawn
Application number
EP19860901523
Other languages
German (de)
English (en)
Inventor
Daya Ranjit Senanayake
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
Publication of EP0213166A1 publication Critical patent/EP0213166A1/fr
Withdrawn legal-status Critical Current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
    • B28D5/04—Fine working of gems, jewels, crystals, e.g. of semiconductor material; apparatus or devices therefor by tools other than rotary type, e.g. reciprocating tools
    • 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
    • B28D5/0058—Accessories specially adapted for use with machines for fine working of gems, jewels, crystals, e.g. of semiconductor material

Definitions

  • a mechanical device and process for grooving and cleaving all hard and brittle materials with cleaving grains such as sapphires, diamonds quartz etcetera.
  • the invention relates to the diamond and precious stones processing and cleaving fields and the cleaving of all other similar hard and brittle materials.
  • the background art for cleaving diamonds and precious stones is for the stones for example a rough diamond, which is to be cleaved to be a) Marked with ink at the point to be cleaved along the cleaving grain. b) Pasted with cement exposing the point to be cleaved and fixed onto a copper or metal holder.
  • a second stone or a piece of diamond with a sharp point is then pasted with cement and mounted onto a hand held stick or a stick mounted on a movable point.
  • the Diamond or stone to be cleaved is then held in a position and the second diamond or stone mounted on the stick is positioned over the cleaving point marked on the first stone. This is then rubbed vigorously by hand against the first stone until a groove is cut in the diamond or stone to be cleaved at the market point.
  • a thin blade is inserted into the groove and hammered sharply causing the diamond or stone to crack along the cleaving grain.
  • the invention is a mechanical device depicted in the drawing which consists of (1) a copper or metal holder which can be adjusted vertically and horizontally and is pushed forward by (2) a spring loaded device and (3) a second claw holder with adjustable claws which moves rapidly up and down at variable speed driven by an electric or any other motor or by a foot pedal and (h) belt drive, through a rotating shaft fixed to a camshaft.
  • the diamond or stone to be cleaved is a) Marked with ink at the point to be cleaved along the cleaving grain b) Pasted with cement or mechanically fixed to the copper or metal holder, exposing the point to be cleaved.
  • a second stone or diamond with a pyramid shape and a sharp edge is fixed in the adjustable claws of the. second clawholder.
  • the first holder is then adjusted vertically or horizontally until the point to be cleaved marked on the first stone or diamond touches the sharp edge of the second diamond which is fixed to the claw holder.
  • the second claw holder is then driven in a rapid up and down motion with a very short stroke.
  • the groove can be made in the exact position marked for cleaving because the two diamonds can be adjusted till they touch at the correct position.
  • a sharp edge on this mechanical device can be used to make grooves on many diamonds or stones as against which a number of sharp points can be used to make a groove on just a few diamoncfeor stones in the normal hand held method.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Adornments (AREA)

Abstract

L'invention concerne essentiellement le domaine de l'entaillage et du clivage de pierres précieuses et de diamants et de tous autres types de matériaux durs et/ou cassants. Le problème technique est que lors de la réalisation d'une entaille dans la pierre ou le diamant ou tout autre morceau de matériau à cliver à l'aide des procédés manuels actuels ou d'autres procédés en usage, il est extrêmement difficile et fastidieux d'entailler au bon endroit, et, de surcroît, d'effectuer une entaille fine et étroite. La présente invention résout ce problème par le montage de la première pierre ou diamant ou morceau de matériau à entailler et à cliver sur un support à griffes ou un autre type de support fixé sur un dispositif réglable. La seconde pierre ou diamant ou morceau de matériau est montée sur un second support avec un taillant fin qui dépasse. Ce taillant fin est ensuite déplacé et réglé pour venir en contact avec la première pierre exactement au point d'entaillage et de clivage. Ainsi l'entaille est réalisée uniquement à l'endroit désiré et l'emploi d'un taillant fin (courant sur les pierres ou diamants sciés) permet d'obtenir une entaille étroite et un clivage de haute qualité. Grâce à cette invention, le rendement des opérations de clivage de pierres ou de diamants est accru.
EP19860901523 1985-03-11 1986-03-11 Machine a cliver Withdrawn EP0213166A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
LK949785 1985-03-11
LK9497 1985-03-11

Publications (1)

Publication Number Publication Date
EP0213166A1 true EP0213166A1 (fr) 1987-03-11

Family

ID=19720950

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19860901523 Withdrawn EP0213166A1 (fr) 1985-03-11 1986-03-11 Machine a cliver

Country Status (2)

Country Link
EP (1) EP0213166A1 (fr)
WO (1) WO1986005435A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8912050D0 (en) * 1989-05-25 1989-07-12 Biron Marcel A method of,and apparatus for cleaving gemstones

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2716403A (en) * 1952-10-11 1955-08-30 Moser Ernest Machine for machining jewels
US3266476A (en) * 1964-02-17 1966-08-16 Swaab Jack Machine for cutting precious stones
GB2074910B (en) * 1980-04-23 1983-04-20 Gersan Etab Working gemstones

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8605435A1 *

Also Published As

Publication number Publication date
WO1986005435A1 (fr) 1986-09-25

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19861223

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): BE GB

R17P Request for examination filed (corrected)

Effective date: 19861223

17Q First examination report despatched

Effective date: 19880419

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19880830