EP0945217A1 - Vorrichtung zum Facettieren von Edelsteine und dergleiche - Google Patents

Vorrichtung zum Facettieren von Edelsteine und dergleiche Download PDF

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Publication number
EP0945217A1
EP0945217A1 EP98105275A EP98105275A EP0945217A1 EP 0945217 A1 EP0945217 A1 EP 0945217A1 EP 98105275 A EP98105275 A EP 98105275A EP 98105275 A EP98105275 A EP 98105275A EP 0945217 A1 EP0945217 A1 EP 0945217A1
Authority
EP
European Patent Office
Prior art keywords
faceting
dop
dop stick
stick
cursor
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Withdrawn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
EP98105275A
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English (en)
French (fr)
Inventor
Forlani Fausto
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.)
Dueffe Srl
Original Assignee
Dueffe Srl
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Filing date
Publication date
Application filed by Dueffe Srl filed Critical Dueffe Srl
Priority to EP98105275A priority Critical patent/EP0945217A1/de
Publication of EP0945217A1 publication Critical patent/EP0945217A1/de
Withdrawn legal-status Critical Current

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    • 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

Definitions

  • the present invention relates to an apparatus for working precious stones, gems, semi-precious stones and the like; essentially, the apparatus comprising a device for faceting the stones and an instrument for aligning the stones.
  • US-A- 3,940,888 discloses a faceting device for gemstones.
  • the device is used for properly orienting a gemstone for forming facets thereon in a plurality of coaxial rows with equal spacing of the facets in the rows.
  • a dop stick is provided on the end of a faceting shaft secured in a quill sleeve rotatably mounted in a faceting head (which can be angularly adjusted for different facet rows to be formed).
  • a spring-biased detent trigger is pivoted on the bracket to engage between the teeth of an indexing gear secured on a collar on the quill sleeve near the other end of the shaft.
  • a positioning pin is secured to the collar and projects through the gear.
  • a guide disc having evenly spaced peripheral notches is engaged around and can be rotated on a flanged bushing threadably engaged on the quill sleeve adjacent the gear, and a coil spring is provided on the bushing, urging the disc toward the gear.
  • the disc has respective holes spaced to receive the pin to establish the angular relationship between the successive rows of evenly spaced facets.
  • the notches on the disc guide the detent trigger into engagement between the gear teeth for assuring uniform angular rotational steps of the shaft in forming the facets of a particular row.
  • US-A- 4,263,753 relates to an interchangeable faceting apparatus with reversible dual indexing mechanism.
  • the apparatus comprises a reversible dual indexing mechanism consisting of a primary indexing gear with a small number of notches and an auxiliary indexing gear controlling the primary gear, and a height adjusting mechanism which permits a faceter frame to be precisely positioned with respect to the lap surface at any height of the faceter frame.
  • the primary indexing gear with a relatively small number of notches engaged by a spring trigger provide subdivided indexes by the action of the auxiliary indexing gear
  • the apparatuses disclosed by the known documents consist of a device for faceting gemstones and an instrument for aligning the dop sticks;
  • the device comprises a lap and a plate supporting a forked arm which holds the dop stick, while the aligning instrument consists of a bracket with two coplanar walls;
  • the dop stick rests against the first wall for holding the gemstone of which a first faceting has taken place, the dop stick is disposed against the second wall for transferring the gemstone which must be faceted successively.
  • the purpose of this invention is to remedy these defects.
  • the invention as claimed, solves the problem of creating an apparatus for faceting gems and the like.
  • the supporting plate of the apparatus according to the invention is vertically moved by means of a grooved shaft on which a pair of gears acts, the shaft being guided by a bushing having a groove which snugly contains the shaft; therefore, the supporting plate maintains its horizontal lying in the long run.
  • the advantages due to the use of the invention consist in the fact that the device for faceting the stones presents a basis held by the supporting plate; the basis supports both the forked arm and the faceting head and allows their horizontal rotation by means of a pivot.
  • This configuration assures the parallelism between the supporting plate and the faceting device since the basis does not wear; in addition, the alignment of the gemstone with respect to the lap is obtained by means of a precise graduated reference device in both horizontal and vertical directions, the reference device being fitted with respective delicate indexing devices easy to read; the devices controlling the displacement of the angular positions being easily accessible and controllable.
  • An instrument for aligning the stone is provided for transferring the stone from a dop stick to another; the angular precision in the transferring is assured by two holes for the insertion of the pins integral with the dop sticks and by two grooves for bearing said dop sticks.
  • the movable upper part (cursor) assures precise prompt transferring manoeuvre.
  • the apparatus of Fig.1 comprises a device 1 for faceting the stones and an instrument 2 for their alignment.
  • the faceting device 1 consists of a structure 3 holding a lap 4, a bearing plate 5 for a mechanism 6 holding the dop stick for the faceting; the instrument 2 presents a cursor 7 held by the upper part of a bracket 8, said cursor 7 holding a dop stick 9.
  • the faceting device 1 shown in Fig.2 consists, among other things, of the structure 3 which supports the lap 4; an electric motor (not shown) is provided inside the structure 3 to vary the angular speed and reverse the rotation direction of the lap 4, the electric motor is fed by two rheophores indicated by the respective polarities (+,-).
  • the electric motor is mechanically connected to the lap 4 by means of a shaft 10.
  • a tank 11 contains water (or another liquid suitable for the purpose) which is sent to the upper surface of the lap 4 through a duct 12; the lap 4 is housed in a recipient 13 which is used for collecting and dripping the water.
  • a pair of gears (not shown) is capable of lifting and lowering the bearing plate 5; the gears inside the structure 3 are mechanically connected to the bearing plate 5 through a grooved shaft 14 and manoeuvred by means of a handwheel 15.
  • the grooved shaft 14 is guided by a bushing 57 presenting a groove snugly containing the shaft 14.
  • the bearing plate 5 is eccentric with respect to the axis of symmetry of the shaft 14 secured to the free end of the same shaft 14; therefore, the bearing plate 5 can only be vertically lifted and lowered.
  • the holding mechanism 6 presents a lower basis 16 directly bearing on the bearing plate 5, a handgrip 17 is used for rotating a faceting head 18.
  • Fig.3 shows a plan view of the same devices; the handgrip 17 is integral with a forked arm 19, the free end of which supports the faceting head 18; therefore, the rotation of the forked arm 19 takes place in the lying delimited by the forked arm 19 and in both opposite directions indicated by the arrows F 1 , F 2 .
  • Fig.4 represents a plan view of a second embodiment of the device for faceting gemstones; this device is substantially like the device shown in the previous figures, except for two laps 4a, 4b respectively housed in two recipients 13a, 13b, while two ducts 12a, 12b respectively bringing the water to the two laps 4a, 4b, come out of the tank 11; both laps 4a, 4b are rotated by two shafts 10a, 10b both being mechanically conncected to the electric motor placed inside the structure 3.
  • the gemstone held by the faceting head 18 is worked by the two laps 4a, 4b each presenting a different granulometry suitable for two subsequent faceting phases. Therefore, the forked arm 19 is rotated in two subsequent faceting positions 19a, 19b, while the faceting head 18 is displaced in correspondent positions 18a, 18b. If required, the laps 4a, 4b rotate at different angular speed.
  • the aligning instrument is shown in the Figs 5, 6; this instrument consists of a supporting basis 20 which defines a flat upper surface 21, the basis 20 being integral with a bracket 22 which develops vertically and presents a V-shaped vertical bearing groove 23 which is used as a support for a dop stick 9a the end 34a of which holds a partially faceted stone 24; a pin 25a is provided for obtaining the exact verticality of the dop stick 9a, said pin 25a perpendicularly protruding from the side surface of the dop stick 9a; the pin 25a is inserted into a horizontal hole 36 pierced in the bracket 22 near the vertical bearing groove 23; when the lower end of the dop stick 9a rests on the flat surface 21 and the pin 25a is inserted in the hole 36, the dop stick 9a is made adhering to the bearing groove 23 through a screw 26 screwed in a plate 27 integral with the bracket 22. In this manner, the vertical positioning of the dop stick 9a is reached, so that it is enough to take the
  • the upper part of the bracket 22 holds a cursor 28 which moves vertically in the guide 29 also shown in Fig.7; the cursor 28 presents a hole 30 for supporting a dop stick 9b where the gemstone 24 must be transferred; the hole 30 develops horizontally and the cursor 28 presents a V-shaped vertical bearing groove 31 on which the dop stick 9b rests; the inserting of the pin 25b of the dop stick 9b into said hole 30 and the adhering of the dop stick 9b to the groove 31 by means of a screw 32 screwed in a plate 33 integral with the cursor 28 guarantee the verticality of the dop stick 9b.
  • the two dop sticks 9a, 9b are coaxial to each other owing to the structural configuration of the instrument and the alignment of the two grooves 23, 31.
  • the lowering of the cursor 28 brings the end 34b of the dop stick 9b into contact with the faceted part of the gemstone 24; an adhesive is used for maintaining the faceted part of the gemstone 24 secured to said end 34b.
  • Fig.7 shows in detail and in a different scale the section with the plane C-D of Figs 5, 6 of the bracket 22 for highlighting the V-shaped longitudinal groove 31, on which the dop stick 9b rests, and the guide 29; the groove 31 is located in the part of the cursor 28 housing the dop stick 9b.
  • Fig.8 represents a side view of the dop stick 9a fitted with the end 34a holding the gemstone 24, the pin 25a which must be inserted into the hole 36 of the bracket 22 and a threaded end 35a opposite to the end 34a.
  • Fig.9 shows a side view of the dop stick 9b, to the end 34b of which the gemstone 24 must be transferred, the pin 25b to be inserted into the hole 30 of the cursor 28 and a threaded end 35b opposite to the end 34b.
  • Figs 10, 11, 12 respectively show the dop stick 9a in three angular position for three different types of faceting working of the gemstone 24.
  • the pin 25a is inserted in the horizontal hole 36 made in the bracket 22 near the vertical bearing groove 23; the pin 25a of Fig.11 rests on the vertical wall 37 of the bracket 22 in which the groove 23 is defined; the pin 25a is found in a position perpendicular to the position of Fig.10; in Fig.12 the pin 25a rests on the vertical wall 37 of the bracket 22 and occupies a position rotated by 180° with respect to the position of Fig.11. In said positions the dop stick 9a adheres to the vertical bearing groove 23.
  • the holding mechanism of the dop stick for faceting gemstones shown in Figs 13, 14, 15 presents the handgrip 17 integral with the forked arm 19 holding the faceting head 18.
  • the basis 16 integral with the mechanism rests on the bearing plate 5 of the faceting device 1; a precisely vertical pin 39 fastened to the basis 16 is used for rotating the handgrip 17 and the forked arm 19 around the vertical axis E; the directions of rotation are indicated by the arrows F 1 , F 2 .
  • a horizontal pivot 40 supports the faceting head 18 to allow rotation around the horizontal axis F in order to displace the faceting head 18 in various positions like those indicated in Figs 14, 15.
  • the rotation around the pin 39 occurs in a plane parallel to the lap 4 and the bearing plate 5; this rotation helps to give uniformity to the faceting of the various parts of the gemstone 24.
  • the rotation around the pivot 40 helps to choose the faceting angles of the head 18 with respect to the lap 4; the directions of rotation being indicated by the arrows F 3 , F 4 .
  • the faceting head 18 is indicated in the Figs 16, 17 in another scale.
  • the dop stick 9a holding the gemstone 24 is inserted in a bushing 41 and fastened by a nut 42 screwed on the threaded end 35a of the dop stick 9a; the cross and angular positions of the dop stick 9a with respect to the axis G of the faceting head 18 are defined by the pin 25a clamped by the V-shaped flaring 43 provided at a first end 44 of the bushing 41.
  • the second end of the bushing 41 presents a bearing plane 45 for a ring nut 46 used as angular reference device for the faceting head 18 and the dop stick 9a, 9b; the ring nut 46 being clamped to the bushing 41 through a nut 47.
  • a stop ring 55 secures the bushing 41 to the body 56 of the faceting head 18.
  • a first indexing sector 48 is mounted on the faceting head 18, the indexing sector 48 being fitted with a 0°-90° graduated scale for indicating the angular position of the faceting head 18 with respect to the plane of the lap 4 (Fig.15).
  • a second indexing sector 49 (nonius) is provided opposite the first indexing sector 48 for defining the zero-point of the rotation and obtaining a tenth of degree precision in the directions of rotation F 3 , F 4 (Fig.15). The stopping of the rotation in the chosen angular position is obtained by means of a knob 50.
  • the rotation around the axis G of the dop stick 9a is reached by rotating the bushing 41, while the angular position is indicated by the ring nut 46; the stopping of the rotation in the chosen angular position is reached by means of a tang 51 ending with a wedge 53 which engages the chosen notch of the ring nut 46.
  • a reference notch is provided at the second end of the tang 51 for defining the zero-point of the rotation and obtaining a tenth of degree precision in the horizontal direction by means of an indexing plate 52.
  • Fig.18 shows a plan view of a constructive detail of the faceting head 18 also indicating the position of the section E-F for defining the Figs 19, 20.
  • the wedge 53 of the tang 51 may be clamped by the sheet 54 for allowing free rotation of the bushing 41 (Fig.19) or engaged by the ring nut 46 (Fig.20) for the stopping in the chosen angular position.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Adornments (AREA)
EP98105275A 1998-03-24 1998-03-24 Vorrichtung zum Facettieren von Edelsteine und dergleiche Withdrawn EP0945217A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP98105275A EP0945217A1 (de) 1998-03-24 1998-03-24 Vorrichtung zum Facettieren von Edelsteine und dergleiche

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP98105275A EP0945217A1 (de) 1998-03-24 1998-03-24 Vorrichtung zum Facettieren von Edelsteine und dergleiche

Publications (1)

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EP0945217A1 true EP0945217A1 (de) 1999-09-29

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EP98105275A Withdrawn EP0945217A1 (de) 1998-03-24 1998-03-24 Vorrichtung zum Facettieren von Edelsteine und dergleiche

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100893599B1 (ko) 2007-07-11 2009-04-20 차인선 초정밀 다이아몬드팁 연마장치
DE102008035730A1 (de) * 2007-12-23 2009-06-25 Paul Wild Ohg Anbringen eines Bearbeitungsstifts an einem zu schleifenden Edelstein
CN101941168A (zh) * 2010-06-29 2011-01-12 陈哲 全自动钻石磨抛机的转接及其夹具转接单元
CN102059616A (zh) * 2009-10-27 2011-05-18 金华久隆机械有限公司 一种加工饰品的转接装置及上珠、下料、转接一体机
CN102218687A (zh) * 2011-06-01 2011-10-19 张岳恩 全自动钻石磨抛系统的夹具传送机构
CN103100943A (zh) * 2013-02-07 2013-05-15 浙江欧源机械科技有限公司 水晶坯件自动磨抛系统及其对接机构
WO2013093938A1 (en) * 2011-10-17 2013-06-27 Sahajanand Technologies Private Limited Gemstone processing
CN103659518A (zh) * 2013-12-18 2014-03-26 浙江名媛工艺饰品有限公司 一种水晶坯件自动磨抛系统及其对接机构
US9962859B2 (en) 2011-10-17 2018-05-08 Sahajanand Technologies Private Limited Gemstone processing

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2724220A (en) * 1951-07-30 1955-11-22 Shaw Louis Eaton Faceting device for gem stones
US3815289A (en) * 1972-08-14 1974-06-11 D Hoffman Gem grinder having a pivotable rack and gear assembly
US4106240A (en) * 1977-01-10 1978-08-15 Bartolo Paul I De Apparatus for precisely indexing the orientation of a portion of a device with respect to a support structure of the device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2724220A (en) * 1951-07-30 1955-11-22 Shaw Louis Eaton Faceting device for gem stones
US3815289A (en) * 1972-08-14 1974-06-11 D Hoffman Gem grinder having a pivotable rack and gear assembly
US4106240A (en) * 1977-01-10 1978-08-15 Bartolo Paul I De Apparatus for precisely indexing the orientation of a portion of a device with respect to a support structure of the device

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100893599B1 (ko) 2007-07-11 2009-04-20 차인선 초정밀 다이아몬드팁 연마장치
US8815039B2 (en) 2007-12-23 2014-08-26 Paul Wild Ohg Application of a processing pin to a gemstone which is to be cut or polished
DE102008035730A1 (de) * 2007-12-23 2009-06-25 Paul Wild Ohg Anbringen eines Bearbeitungsstifts an einem zu schleifenden Edelstein
DE102008035730B4 (de) * 2007-12-23 2009-10-15 Paul Wild Ohg Verfahren zur Anbringung eines Bearbeitungsstifts an einen zu schleifenden Edelstein sowie Handhabungs- oder Bearbeitungsstift und Messstift zum Durchführen des Verfahrens
DE112008003507B4 (de) * 2007-12-23 2020-08-06 Paul Wild Ohg Verfahren zum Anbringen eines nächsten Handhabungs- oder Bearbeitungsstifts als Folgestift an einem ungeschliffenen rohen Stein als Rohstein
CN102059616A (zh) * 2009-10-27 2011-05-18 金华久隆机械有限公司 一种加工饰品的转接装置及上珠、下料、转接一体机
CN102059616B (zh) * 2009-10-27 2012-10-17 金华久隆机械有限公司 一种加工饰品的转接装置及上珠、下料、转接一体机
CN101941168A (zh) * 2010-06-29 2011-01-12 陈哲 全自动钻石磨抛机的转接及其夹具转接单元
CN102218687A (zh) * 2011-06-01 2011-10-19 张岳恩 全自动钻石磨抛系统的夹具传送机构
WO2013093938A1 (en) * 2011-10-17 2013-06-27 Sahajanand Technologies Private Limited Gemstone processing
US9962859B2 (en) 2011-10-17 2018-05-08 Sahajanand Technologies Private Limited Gemstone processing
CN103100943A (zh) * 2013-02-07 2013-05-15 浙江欧源机械科技有限公司 水晶坯件自动磨抛系统及其对接机构
CN103100943B (zh) * 2013-02-07 2015-06-10 浙江欧源机械科技有限公司 水晶坯件自动磨抛系统及其对接机构
CN103659518A (zh) * 2013-12-18 2014-03-26 浙江名媛工艺饰品有限公司 一种水晶坯件自动磨抛系统及其对接机构

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