US3073085A - Machine for grinding and polishing facets of precious stones - Google Patents

Machine for grinding and polishing facets of precious stones Download PDF

Info

Publication number
US3073085A
US3073085A US111014A US11101461A US3073085A US 3073085 A US3073085 A US 3073085A US 111014 A US111014 A US 111014A US 11101461 A US11101461 A US 11101461A US 3073085 A US3073085 A US 3073085A
Authority
US
United States
Prior art keywords
shaft
fork
secured
grinding
machine
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
Application number
US111014A
Inventor
Ticino John
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 US111014A priority Critical patent/US3073085A/en
Application granted granted Critical
Publication of US3073085A publication Critical patent/US3073085A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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

Definitions

  • This invention relates to grinding apparatus, and more particularly to a machine for grinding the facets of precious stones or gems.
  • One object of the present invention is to provide a machine of the above nature for holding precious stones and gems in various positions and angles to enable a grinding wheel to accurately cut the facets without having recourse to templates or other devices.
  • a further object is to provide a device of the above nature by means of which the facets of the precious stone may be cut by a person of ordinary ability without requiring highly skilled labor.
  • a further object is to provide a machine of the above nature, in which the angle of the facet with respect to the grinding wheel may be readily adjusted.
  • a further object is to provide a machine of the above nature which will be simple in construction, inexpensive to manufacture, easy to install and manipulate, compact, ornamental in appearance and very efficient and durable in use.
  • FIG. 1 represents a side view in elevation, of theimproved gem grinding and polishing machine as it appears in use with the precious stone held against the grinding wheel located therebeneath.
  • FIG. 2 is a fragmentary top plan view of the same.
  • FIG. 3 is a side sectional view, taken along the broken line 33 of FIG. 2, looking in the direction of the arrows.
  • FIG. 4 is a vertical sectional view, taken along the line 4-4 of FIG. 2, looking in the direction of the arrows.
  • FIG. 5 is a vertical sectional view, taken along the lines 5-5 of FIG. 2, looking in the direction of the arrows.
  • FIG. 6 is a sectional view, along the line 6-6 of FIG. 3, illustrating the shape of the indexing plate for controlling the angle of the facet with respect to the grinding wheel.
  • FIG. 7 is a partial sectional view of the thumb screw for locking the stop on the protractor at the desired angle.
  • the numeral 119 indicates a metal base upon which the machine is mounted.
  • the gem or precious stone indicated by the letter G is secured by cement C to a small rod known in the trade as a dop stick, and indicated by the numeral 11, which in turn is secured by means of a set screw 12 within a tubular housing 13, as clearly shown in FIGS. 1 and 2 f the drawing.
  • the housing 13 is secured to a fork 14 having ball bearings 14a and 1412 as clearly shown in FIG. 3, for a shaft 16 secured by a set screw 17 to the tubular housing 13.
  • the block 18 is adjustably secured to the indexing plate 15 by means of a flat head screw 21 (shown in FIGS. 3
  • a slidable pin 22 (FIG. 3), having a reduced rear tip 22a which is adapted to fit within any one of a circular row of countersunk holes 15a of said index plate 15, according to the number of facets required on the precious stone G, to be ground by a grinding wheel GW, located above a fixed pan P.
  • the slidable pin 22 is held in selected indexed position by means of a handle 25 which is adapted to seat in a helical cam slot 23 of a bearing block 24, said handle 25 extending at right angles to said pin 22.
  • the bearing block 24 is secured to the fork 14 by a pair of cap screws 24a and 24b (FIG. 2).
  • the handle is adapted to be secured to the pin 22 by means of a set screw 28.
  • the fork .14 is provided with a pair of parallel arms 29 and 30 (FIG. 2) which are adapted to be pivotally mounted upon a horizontal shaft 31 secured to said fork by means of a pair of set screws 32, 33.
  • the shaft 31 serves to connect the fork 14 to a universal swivel block 34 which is mounted on said shaft 31 by ball bearings 35, 36. Provision is also made of a pair of cap screws 39, 40, (FIG. 4) for securing a pointer 58 to the universal swivel block 34.
  • top and bottom ball bearings 37, 38 mounted in the upper and lower bearing arms 42a and 42b of the main body 42, said ball bearing holding the shaft 41, as clearly shown in FIG. 3 of the drawing, said shaft 41 being secured in the universal swivel block 34 by means of the set screws 34a and 34b.
  • the main body 42 (FIGS. 1 and 2) has a vertical hollow boss 420 secured by a thumb screw 44 to the vertical main shaft 43.
  • a fine pitch micrometer nut 45 below which is a lock nut 46, by means of which the main body 42 may be accurately held in adjusted vertical position, said lock nut 46 being secured to the shaft 43 by a thumb screw 47.
  • the bottom of the vertical shaft 43 is secured to the base 10 by a pedestal flange 48, bolts 49, and nuts 50, as clearly shown in FIGS. 1 and 2 of the drawing.
  • a semicircular protractor 52 rigidly mounted on the fork 14 and having a scale 53 (FIG. 3) adjacent the edge thereof.
  • the protractor 52 is secured to the fork 14 by means of a cap screw 54 and is provided with a stop 55 having a beveled edge for clearance, (as shown in FIG. 7).
  • the stop 55 is secured to the protractor 52 by a thumb nut 56 and a set screw 57.
  • the stop 55 may be adjustably mounted in an arcuate slot 59 of the scale 53 to which it is secured by the thumb nut 56 (FIG. 1).
  • the grinding wheel GW is secured to a vertical arbor 68 mounted to rotate in a bearing block 61 which is secured by bolts 62 to the base 10.
  • the numeral 63 indicates in dotted lines the appearance of the dop stick 11 when it is adjusted to an angle 45 degrees from the full line normal position prior to swinging it beneath the housing 13 into vertical position for the purpose of grinding or polishing the crown or top facet of a stone.
  • the gem G to be cut is secured by cement C to the dop stick 11, and the housing 13 will then be indexed to bring the desired facet of the gem G into engagement with the grinding wheel GW.
  • the main body 42 will be adjusted to the desired height by means of the micrometer nut 45 and held in adjusted position by the thumb screw 47'.
  • the housing 13 and the dop stick 11 may be swung upwardly about the axis of the horizontal shaft 31, and readjusted.
  • a main body mounted on a base, a vertical shaft journalled in said main body, a universal swivel block pivotally mounted on said vertical shaft, a horizontal shaft mounted in the forward part of said swivel block, a two arm fork pivotally mounted upon the ends of said horizontal shaft, a cylindrical housing carried by the forward portion of said fork, and a precious stoneholding dop stick adjustably secured within said housing, for permitting any desired facet of said precious stone to be held manually against a horizontal grinding wheel located beneath it, said fork carrying a small inclined shaft in alignment with and behind said dop stick, a cir- 4 cular indexing plate secured at right angles on the rear end of said small shaft'and provided with a rowof spaced holes at its perimeter, and 'a spring-pressed sliding pin mounted in said fork for selectively engaging within any one of said holes, said spring-pressed sliding pin being parallel to said small shaft.

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

Jan.
Filed 1963 J. TICINO 3,073,085
MACHINE FOR GRINDING AND POLISHING FACETS 0F PRECIOUS STONES May 18, 1961 2 Sheets-Sheet 1 JoH/v TIC/N HT TORNEY Jan. 15, 1963 J. TlClNO MACHINE FOR GRINDING AND POLISHING FACETS 0F PRECIOUS STONES Q a I, 2 2 4 t 7 w s I 8 a z ,4 y a m a 3% fi m 5 xx ow 3 2 a 4 5 0 0 9 2 a 3 5 e9 5 6 in 2 d //J/ 6 6 2 a. an H #2 4 A! Z ,4 1O M g M 5 W W 2 2 1 3 w z 1- 8 H. M m m INVENTOR. J 0 HN 7 1 cm 0 BY h HTTORNEY United States atent Patented Jan. 15, 1963 fifice This invention relates to grinding apparatus, and more particularly to a machine for grinding the facets of precious stones or gems.
One object of the present invention is to provide a machine of the above nature for holding precious stones and gems in various positions and angles to enable a grinding wheel to accurately cut the facets without having recourse to templates or other devices.
A further object is to provide a device of the above nature by means of which the facets of the precious stone may be cut by a person of ordinary ability without requiring highly skilled labor.
A further object is to provide a machine of the above nature, in which the angle of the facet with respect to the grinding wheel may be readily adjusted.
A further object is to provide a machine of the above nature which will be simple in construction, inexpensive to manufacture, easy to install and manipulate, compact, ornamental in appearance and very efficient and durable in use.
With these and other objects in view there has been illustrated on the accompanying drawing one form in which the invention may conveniently be embodied in practice.
In the drawings,
FIG. 1 represents a side view in elevation, of theimproved gem grinding and polishing machine as it appears in use with the precious stone held against the grinding wheel located therebeneath.
FIG. 2 is a fragmentary top plan view of the same.
FIG. 3 is a side sectional view, taken along the broken line 33 of FIG. 2, looking in the direction of the arrows.
FIG. 4 is a vertical sectional view, taken along the line 4-4 of FIG. 2, looking in the direction of the arrows.
FIG. 5 is a vertical sectional view, taken along the lines 5-5 of FIG. 2, looking in the direction of the arrows.
FIG. 6 is a sectional view, along the line 6-6 of FIG. 3, illustrating the shape of the indexing plate for controlling the angle of the facet with respect to the grinding wheel.
FIG. 7 is a partial sectional view of the thumb screw for locking the stop on the protractor at the desired angle.
Referring now to the drawings, in which like reference numerals denote the corresponding parts throughout the several views, the numeral 119 indicates a metal base upon which the machine is mounted. The gem or precious stone indicated by the letter G is secured by cement C to a small rod known in the trade as a dop stick, and indicated by the numeral 11, which in turn is secured by means of a set screw 12 within a tubular housing 13, as clearly shown in FIGS. 1 and 2 f the drawing. The housing 13 is secured to a fork 14 having ball bearings 14a and 1412 as clearly shown in FIG. 3, for a shaft 16 secured by a set screw 17 to the tubular housing 13.
Provision is also made of a circular indexing plate 15 secured upon the shaft 16 by a block 18 having a split section 19, the sides of which are adjustably clamped upon said shaft 16 by means of a cap screw 20 (FIG. The block 18 is adjustably secured to the indexing plate 15 by means of a flat head screw 21 (shown in FIGS. 3
and 6 of the drawing).
In order to hold the indexing plate 15 in any desired angular position, provision is made of a slidable pin 22 (FIG. 3), having a reduced rear tip 22a which is adapted to fit within any one of a circular row of countersunk holes 15a of said index plate 15, according to the number of facets required on the precious stone G, to be ground by a grinding wheel GW, located above a fixed pan P.
The slidable pin 22 is held in selected indexed position by means of a handle 25 which is adapted to seat in a helical cam slot 23 of a bearing block 24, said handle 25 extending at right angles to said pin 22. The bearing block 24 is secured to the fork 14 by a pair of cap screws 24a and 24b (FIG. 2).
Provision is also made of a helical spring 26 surrounding the pin 22 and located within a recess 27 in the bearing block 24. The handle is adapted to be secured to the pin 22 by means of a set screw 28.
The fork .14 is provided with a pair of parallel arms 29 and 30 (FIG. 2) which are adapted to be pivotally mounted upon a horizontal shaft 31 secured to said fork by means of a pair of set screws 32, 33.
The shaft 31 serves to connect the fork 14 to a universal swivel block 34 which is mounted on said shaft 31 by ball bearings 35, 36. Provision is also made of a pair of cap screws 39, 40, (FIG. 4) for securing a pointer 58 to the universal swivel block 34.
Provision is also made of top and bottom ball bearings 37, 38 mounted in the upper and lower bearing arms 42a and 42b of the main body 42, said ball bearing holding the shaft 41, as clearly shown in FIG. 3 of the drawing, said shaft 41 being secured in the universal swivel block 34 by means of the set screws 34a and 34b. The main body 42 (FIGS. 1 and 2) has a vertical hollow boss 420 secured by a thumb screw 44 to the vertical main shaft 43.
Beneath the main body 42, provision is made of a fine pitch micrometer nut 45, below which is a lock nut 46, by means of which the main body 42 may be accurately held in adjusted vertical position, said lock nut 46 being secured to the shaft 43 by a thumb screw 47. The bottom of the vertical shaft 43 is secured to the base 10 by a pedestal flange 48, bolts 49, and nuts 50, as clearly shown in FIGS. 1 and 2 of the drawing.
In order to control the angle of the dop stick 11 with respect to the swivel block 34, provision is made of a semicircular protractor 52 rigidly mounted on the fork 14 and having a scale 53 (FIG. 3) adjacent the edge thereof. The protractor 52 is secured to the fork 14 by means of a cap screw 54 and is provided with a stop 55 having a beveled edge for clearance, (as shown in FIG. 7). The stop 55 is secured to the protractor 52 by a thumb nut 56 and a set screw 57.
Provision is also made of a pointer 58 secured to the swivel block 34 (FIG. 4) and located close to the protractor scale 53. The stop 55 may be adjustably mounted in an arcuate slot 59 of the scale 53 to which it is secured by the thumb nut 56 (FIG. 1).
The grinding wheel GW is secured to a vertical arbor 68 mounted to rotate in a bearing block 61 which is secured by bolts 62 to the base 10.
The numeral 63 (FIG. 2) indicates in dotted lines the appearance of the dop stick 11 when it is adjusted to an angle 45 degrees from the full line normal position prior to swinging it beneath the housing 13 into vertical position for the purpose of grinding or polishing the crown or top facet of a stone.
Operation In the operation of this machine, the gem G to be cut is secured by cement C to the dop stick 11, and the housing 13 will then be indexed to bring the desired facet of the gem G into engagement with the grinding wheel GW. The main body 42 will be adjusted to the desired height by means of the micrometer nut 45 and held in adjusted position by the thumb screw 47'.
It will be understood that after the facet of the precious stone has been ground to the desired extent, the housing 13 and the dop stick 11 may be swung upwardly about the axis of the horizontal shaft 31, and readjusted.
While there has been disclosed in this specification one form in which the invention may be embodied, it is to be understood that this form is shown for the purpose of illustration only, and that the invention is not limited to this specific disclosure, but may be modified and embodied in various other equivalent forms without departing from its spirit. In short, the invention includes all the modifications and embodiments coming within the scope of the following claims.
Having thus fully described the invention, what is claimed as new and for which it is desired to secure Letters Patent is:
1. In a machine for grinding and polishing the facets of a precious stone, a main body mounted on a base, a vertical shaft journalled in said main body, a universal swivel block pivotally mounted on said vertical shaft, a horizontal shaft mounted in the forward part of said swivel block, a two arm fork pivotally mounted upon the ends of said horizontal shaft, a cylindrical housing carried by the forward portion of said fork, and a precious stoneholding dop stick adjustably secured within said housing, for permitting any desired facet of said precious stone to be held manually against a horizontal grinding wheel located beneath it, said fork carrying a small inclined shaft in alignment with and behind said dop stick, a cir- 4 cular indexing plate secured at right angles on the rear end of said small shaft'and provided with a rowof spaced holes at its perimeter, and 'a spring-pressed sliding pin mounted in said fork for selectively engaging within any one of said holes, said spring-pressed sliding pin being parallel to said small shaft.
2. The invention as defined in claim 1, in which the main body rests upon a micrometer nut screwed on said vertical shaft to permit the height of said swivel block to be minutely adjusted.
3. The invention as defined in claim 1, in which a longitudinal semicircular protractor scale is mounted on one side of said fork, said swivel block carrying a pointer in proximity to said scale to indicate the exact angular position of said dop stick with respect to said grinding wheel.
4. The invention as defined in claim 1, in which said sliding pin has a forward upstanding handle, and said fork has a helical cam slot. in its forward end engaged by said handle to permit the. manual retraction of said pin whenever it is desired to rotate said precious stone to a different adjusted. angular position.
References Cited in the file of this patent UNITED STATES PATENTS 698,521 Kneip Apr. 29, 1902 753,992 Marcher Mar. 8, 1904 2,444,795 Weir July 6, 1948 2,542,698 OBrien Feb. 24, 1951 2,779,138 Collor Ian. 29, 1957

Claims (1)

1. IN A MACHINE FOR GRINDING AND POLISHING THE FACETS OF A PRECIOUS STONE, A MAIN BODY MOUNTED ON A BASE, A VERTICAL SHAFT JOURNALLED IN SAID MAIN BODY, A UNIVERSAL SWIVEL BLOCK PIVOTALLY MOUNTED ON SAID VERTICAL SHAFT, A HORIZONTAL SHAFT MOUNTED IN THE FORWARD PART OF SAID SWIVEL BLOCK, A TWO ARM FORK PIVOTALLY MOUNTED UPON THE ENDS OF SAID HORIZONTAL SHAFT, A CYLINDRICAL HOUSING CARRIED BY THE FORWARD PORTION OF SAID FORK, AND A PRECIOUS STONEHOLDING DOP STICK ADJUSTABLY SECURED WITHIN SAID HOUSING, FOR PERMITTING ANY DESIRED FACET OF SAID PRECIOUS STONE TO BE HELD MANUALLY AGAINST A HORIZONTAL GRINDING WHEEL LOCATED BENEATH IT, SAID FORK CARRYING A SMALL INCLINED SHAFT IN ALIGNMENT WITH AND BEHIND SAID DOP STICK, A CIRCULAR INDEXING PLATE SECURED AT RIGHT ANGLES ON THE REAR END OF SAID SMALL SHAFT AND PROVIDED WITH A ROW OF SPACED HOLES AT ITS PERIMETER, AND A SPRING-PRESSED SLIDING PIN MOUNTED IN SAID FORK FOR SELECTIVELY ENGAGING WITHIN ANY ONE OF SAID HOLES, SAID SPRING-PRESSED SLIDING PIN BEING PARALLEL TO SAID SMALL SHAFT.
US111014A 1961-05-18 1961-05-18 Machine for grinding and polishing facets of precious stones Expired - Lifetime US3073085A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US111014A US3073085A (en) 1961-05-18 1961-05-18 Machine for grinding and polishing facets of precious stones

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US111014A US3073085A (en) 1961-05-18 1961-05-18 Machine for grinding and polishing facets of precious stones

Publications (1)

Publication Number Publication Date
US3073085A true US3073085A (en) 1963-01-15

Family

ID=22336159

Family Applications (1)

Application Number Title Priority Date Filing Date
US111014A Expired - Lifetime US3073085A (en) 1961-05-18 1961-05-18 Machine for grinding and polishing facets of precious stones

Country Status (1)

Country Link
US (1) US3073085A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3098327A (en) * 1962-07-31 1963-07-23 Charles G Malin Grinding and polishing machine for precious or semi-precious stones
US3135073A (en) * 1962-11-07 1964-06-02 Harold L Odle Faceting head
US3688452A (en) * 1970-07-01 1972-09-05 Arthur L Stevens Lapidary holder and attachment therefor
US4265057A (en) * 1980-04-07 1981-05-05 Hoffman Douglas L Collet chuck aligning assembly for gem faceting machines
US4267670A (en) * 1978-09-15 1981-05-19 Mason Gene C Combined duplicator and preformer for lapidary use
US4517770A (en) * 1980-11-26 1985-05-21 Alec Leibowitz Gemstone polishing machine
US5297362A (en) * 1992-10-09 1994-03-29 Wykoff Gerald L Faceting head apparatus for working colored stones
EP1264660A2 (en) * 2001-06-08 2002-12-11 Faimond S.r.l. Multitool support for faceting machines or the like, provided with means to automatically change the tools
US20100144252A1 (en) * 2008-12-08 2010-06-10 Toyota Motor Enginnering & Manufacturing North America, Inc. Flex-Arm Devices and Methods
US11338408B2 (en) * 2019-05-02 2022-05-24 Steven D. Wortley Positioning device for applying an object to a grinder at pre-determined angles

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US698521A (en) * 1901-01-31 1902-04-29 Frederic R Kneip Apparatus for cutting and polishing precious stones.
US753992A (en) * 1902-11-01 1904-03-08 Frank Albion Marcher Lapidist's facet-cutting instrument.
US2444795A (en) * 1945-09-28 1948-07-06 Leander M Weir Faceting head
US2542698A (en) * 1949-05-23 1951-02-20 O'brien Dan Lapidary device
US2779138A (en) * 1955-04-28 1957-01-29 Lynn H Collar Machine for grinding and polishing gem facets

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US698521A (en) * 1901-01-31 1902-04-29 Frederic R Kneip Apparatus for cutting and polishing precious stones.
US753992A (en) * 1902-11-01 1904-03-08 Frank Albion Marcher Lapidist's facet-cutting instrument.
US2444795A (en) * 1945-09-28 1948-07-06 Leander M Weir Faceting head
US2542698A (en) * 1949-05-23 1951-02-20 O'brien Dan Lapidary device
US2779138A (en) * 1955-04-28 1957-01-29 Lynn H Collar Machine for grinding and polishing gem facets

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3098327A (en) * 1962-07-31 1963-07-23 Charles G Malin Grinding and polishing machine for precious or semi-precious stones
US3135073A (en) * 1962-11-07 1964-06-02 Harold L Odle Faceting head
US3688452A (en) * 1970-07-01 1972-09-05 Arthur L Stevens Lapidary holder and attachment therefor
US4267670A (en) * 1978-09-15 1981-05-19 Mason Gene C Combined duplicator and preformer for lapidary use
US4265057A (en) * 1980-04-07 1981-05-05 Hoffman Douglas L Collet chuck aligning assembly for gem faceting machines
US4517770A (en) * 1980-11-26 1985-05-21 Alec Leibowitz Gemstone polishing machine
US5297362A (en) * 1992-10-09 1994-03-29 Wykoff Gerald L Faceting head apparatus for working colored stones
EP1264660A2 (en) * 2001-06-08 2002-12-11 Faimond S.r.l. Multitool support for faceting machines or the like, provided with means to automatically change the tools
EP1264660A3 (en) * 2001-06-08 2005-08-10 Faimond S.r.l. Multitool support for faceting machines or the like, provided with means to automatically change the tools
US20100144252A1 (en) * 2008-12-08 2010-06-10 Toyota Motor Enginnering & Manufacturing North America, Inc. Flex-Arm Devices and Methods
US8690637B2 (en) * 2008-12-08 2014-04-08 Toyota Motor Engineering & Manufacturing North America, Inc. Flex-arm devices and methods
US11338408B2 (en) * 2019-05-02 2022-05-24 Steven D. Wortley Positioning device for applying an object to a grinder at pre-determined angles

Similar Documents

Publication Publication Date Title
US3073085A (en) Machine for grinding and polishing facets of precious stones
NO166771B (en) HAND SUPPORT DEVICE.
US3465620A (en) Furniture jig
US4332263A (en) Manicure easel
US3135073A (en) Faceting head
US4283043A (en) Cutting torch attachment
US3098327A (en) Grinding and polishing machine for precious or semi-precious stones
GB988381A (en) Tool grinding apparatus
US1908155A (en) Grinding fixture for thread cutting tool bits
US1480522A (en) Charles a
US3435569A (en) Faceting apparatus
US2521231A (en) Vise and jig
US2157816A (en) Device for sharpening cutlery
US2542698A (en) Lapidary device
US2384899A (en) Machine for grinding bits
US1694074A (en) Attachment for grinding machines
US2534384A (en) Apparatus for polishing or forming facets on gems, diamonds, or the like
US2522030A (en) Drafting instrument
US3052033A (en) Circle scriber
US2444795A (en) Faceting head
US277882A (en) Tool-holder for grindstones
US1185762A (en) Tip-forming device for billiard-cues.
US2665680A (en) Radius dresser
US2815017A (en) Grinding wheel dresser
US2349793A (en) Dressing tool