US3266476A - Machine for cutting precious stones - Google Patents

Machine for cutting precious stones Download PDF

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Publication number
US3266476A
US3266476A US345385A US34538564A US3266476A US 3266476 A US3266476 A US 3266476A US 345385 A US345385 A US 345385A US 34538564 A US34538564 A US 34538564A US 3266476 A US3266476 A US 3266476A
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frame
cutting
flap
lower flap
cutting disk
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US345385A
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Swaab Jack
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    • 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

Definitions

  • Known machines of said type comprise a cutting disk rotatable about a horizontal axis and a stone holder which clamps the stone to be cut and which is held in operational position relative to the cutting disk by a swingable support arm.
  • the swing movement of this arm is governed by control means which adjust the position of the arm and thus of the stone prior to and during the cutting operation relative to the cutting disk.
  • said control means comprise a vertical adjusting spindle screwed into said arm and resting upon a resilient support; in another known machine a threaded spindle screwed into the support arm rests upon the machine frame and while being slowly rotated swings the support arm and the stone clamped in its holder against the cutting disk holding the stone in constant operational position.
  • the said and other known control means to govern said movement of the support arm and thus of the stone holder did not permit a regulation of the speed and extent of said movement and its adaptation to the peculiarities of the stone to be cut.
  • the object of my invention is to avoid the said and other disadvantages of the known machines and more particularly to improve the said control means.
  • the improved control means comprise a strap hinge member composed of an upper and a lower flap or leaf and a connecting hinge.
  • the strap hinge member rests with its lower flap upon the machine frame and is displaceable in a direction perpendicular to the axis of the hinge.
  • the above mentioned adjusting spindle for the swingable support arm rests upon the upper flap and follows the same when it is turned over the hinge axis.
  • any above indicated displacement of the strap hinge member in a direction at least substantially perpendicular to the hinge axis will cause the adjusting spindle to rest upon the upper flap at different distances from the hinge axis so that the support arm and thus the stone holder will perform movements of different extent and speed when appropriate driving and actuating means cause during the cutting operation a continuous angular displacement of the upper flap.
  • FIG. 1 is a perspective view of the machine
  • FIG. 2 is a partial sectional view along line 2 -2 of FIG. 1,
  • FIG. 3 is a cross section along line 33 of FIG. 2,
  • FIG. 4 is a partial sectional view similar to FIG. 2, and
  • FIG. 5 is a side view, partly in section, in the direction of arrow 5 in FIG. 1.
  • the machine illustrated in the drawing comprises a base frame 11 which is properly secured to work table 12.
  • a cutting disk 13 which is rotatable upon a horizontal axis and driven in any suitable manner for instance by the 3,266,476 Patented August 16, 1966 belt 14 engaging the pulley 15.
  • the stone such as a diamond 16 to be cut is clamped in a stone holder 17 which is carried in the forked end of the double arm 18 which is pivot-ably mounted in brackets 19 of frame 11.
  • the other end of said arm 18 carries an adjustable counterbalance weight 20 which controls the pressure between the cutting disk 13 and the stone 16 resting thereupon.
  • my present invention relates in particular to the control means which govern the downward movement of the stone 16 while the same rests upon and is being cut by the rotating cutting disk 13.
  • These improved control means permit to easily change, and adapt to the existing particularities of the stone to be cut, the extent and the speed of said downward movement.
  • a strap hinge member composed of two elongated flaps or leaves 21, 22 which are jointed by a hinge 23.
  • the said strap hinge member rests with its lower flap 21 upon the frame 11 and is displaceable in a direction perpendicular to the axis of the hinge 23 as indicated by arrow 30 in FIG. 1.
  • the lower flap 21 is securable to the frame 11 in any adjusted position by the clip 26 or by any equivalent element and carries at its free end a casing 24, which houses an electric motor with suitable transmission means driving a screw 25. This screw passes freely through both flaps 21, 22 and engages an intermediately thereof located washer or nutlike member 27 which supports the upper flap 22.
  • the washer 27 is secured against rotation for example by the tongue 28 which abuts against a side face of the 'flap 22. It will be understood that the screw 25 when rotated causes the engaged washer 27 to move upward or downward forcing thereby the upper flap 22 to turn accordingly about the hinge 23.
  • the arm 18 is provided with an adjusting screw 29 which rests with its free end upon the upper flap 22.
  • the flaps 21, 22 are in a position approximately shown in FIG. 4.
  • the adjusting spindle 29 resting upon the upper flap 22 is so adjusted that the arm 18 brings the stone 16 into an operational starting position relative to the cutting disk 13 and the strap hinge member is displaced in either direction indicated by arrow 30 to regulate the extent and speed of the downward movement of the adjusting screw 29; thus the required extent and speed of the downward movement of the arm 18 with stone 16 is also set during the cutting operation.
  • the motor in casing 24 rotating the screw 25 and the driving means for the cutting disk 13 are started and the stone 16 will slowly and continuously be out.
  • a cutting machine for precious stones such as diamonds
  • the improvement comprising in combination a stationary frame; a cutting disk mounted in the frame rotatably about a horizontal first axis; a support arm mounted in the frame swingably about a horizontal second axis; a stone holder held in the support arm in operational relation to the cutting disk; a strap hinge member including an upper flap articulated to a lower flap; said strap hinge member resting with its lower flap upon the frame shiftably in a direction substantially perpendicular to the articulation axis and perpendicular to said arm;
  • actuating means for the upper flap comprising a substantially vertical rotatable screw member freely penetrating the two flaps near their free ends and a nonrotatable nut 4 .t guiding the upper flap during its gradual approach towards the lower flap.

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

Description

Aug. 16, 1966 v 1 sw 3,256,476
MACHINE FOR CUTTING PRECIOUS STONES Filed Feb. 17, 1964 2 Sheets-Sheet 1 Aug. 16, 1966 J. SWAAB 3,266,476
- MACHINE FOR CUTTING PRECIOUS STONES Filed Feb. l7, 1964 2 Sheets-Sheet 2 FIG.2
United States Patent 3,266,476 MACHINE FOR CUTTING PRECIOUS STONES Jack Swaab, 493 Whitewood Road, Englewood, NJ. Filed Feb. 17, 1964, Ser. No. 345,385 2 Claims. (Cl. 12530) My invention relates to machines for cutting precious stones particularly diamonds.
Known machines of said type comprise a cutting disk rotatable about a horizontal axis and a stone holder which clamps the stone to be cut and which is held in operational position relative to the cutting disk by a swingable support arm. The swing movement of this arm is governed by control means which adjust the position of the arm and thus of the stone prior to and during the cutting operation relative to the cutting disk. In one known machine said control means comprise a vertical adjusting spindle screwed into said arm and resting upon a resilient support; in another known machine a threaded spindle screwed into the support arm rests upon the machine frame and while being slowly rotated swings the support arm and the stone clamped in its holder against the cutting disk holding the stone in constant operational position.
The said and other known control means to govern said movement of the support arm and thus of the stone holder did not permit a regulation of the speed and extent of said movement and its adaptation to the peculiarities of the stone to be cut.
The object of my invention is to avoid the said and other disadvantages of the known machines and more particularly to improve the said control means.
According to my invention the improved control means comprise a strap hinge member composed of an upper and a lower flap or leaf and a connecting hinge. The strap hinge member rests with its lower flap upon the machine frame and is displaceable in a direction perpendicular to the axis of the hinge. The above mentioned adjusting spindle for the swingable support arm rests upon the upper flap and follows the same when it is turned over the hinge axis.
It will be understood that any above indicated displacement of the strap hinge member in a direction at least substantially perpendicular to the hinge axis will cause the adjusting spindle to rest upon the upper flap at different distances from the hinge axis so that the support arm and thus the stone holder will perform movements of different extent and speed when appropriate driving and actuating means cause during the cutting operation a continuous angular displacement of the upper flap.
The said and other objects of my invention will be more fully understood from the following specification when read with the accompanying drawing showing one embodiment of my improved machine for cross-cutting precious stones particularly diamonds.
In the drawing:
FIG. 1 is a perspective view of the machine,
FIG. 2 is a partial sectional view along line 2 -2 of FIG. 1,
FIG. 3 is a cross section along line 33 of FIG. 2,
FIG. 4 is a partial sectional view similar to FIG. 2, and
FIG. 5 is a side view, partly in section, in the direction of arrow 5 in FIG. 1.
The same reference numerals indicate the same parts in all figures.
The machine illustrated in the drawing comprises a base frame 11 which is properly secured to work table 12. Mounted in the forward portion of said frame is a cutting disk 13 which is rotatable upon a horizontal axis and driven in any suitable manner for instance by the 3,266,476 Patented August 16, 1966 belt 14 engaging the pulley 15. The stone such as a diamond 16 to be cut is clamped in a stone holder 17 which is carried in the forked end of the double arm 18 which is pivot-ably mounted in brackets 19 of frame 11. The other end of said arm 18 carries an adjustable counterbalance weight 20 which controls the pressure between the cutting disk 13 and the stone 16 resting thereupon.
While. the machine elements described before are known in the art, my present invention relates in particular to the control means which govern the downward movement of the stone 16 while the same rests upon and is being cut by the rotating cutting disk 13. These improved control means permit to easily change, and adapt to the existing particularities of the stone to be cut, the extent and the speed of said downward movement.
According to my invention, I provide a strap hinge member composed of two elongated flaps or leaves 21, 22 which are jointed by a hinge 23. The said strap hinge member rests with its lower flap 21 upon the frame 11 and is displaceable in a direction perpendicular to the axis of the hinge 23 as indicated by arrow 30 in FIG. 1. The lower flap 21 is securable to the frame 11 in any adjusted position by the clip 26 or by any equivalent element and carries at its free end a casing 24, which houses an electric motor with suitable transmission means driving a screw 25. This screw passes freely through both flaps 21, 22 and engages an intermediately thereof located washer or nutlike member 27 which supports the upper flap 22. The washer 27 is secured against rotation for example by the tongue 28 which abuts against a side face of the 'flap 22. It will be understood that the screw 25 when rotated causes the engaged washer 27 to move upward or downward forcing thereby the upper flap 22 to turn accordingly about the hinge 23.
The arm 18 is provided with an adjusting screw 29 which rests with its free end upon the upper flap 22.
My machine operates as follows:
Before the cutting operation on the stone 16 is started the flaps 21, 22 are in a position approximately shown in FIG. 4. The adjusting spindle 29 resting upon the upper flap 22 is so adjusted that the arm 18 brings the stone 16 into an operational starting position relative to the cutting disk 13 and the strap hinge member is displaced in either direction indicated by arrow 30 to regulate the extent and speed of the downward movement of the adjusting screw 29; thus the required extent and speed of the downward movement of the arm 18 with stone 16 is also set during the cutting operation. After the said adjustments have been made the motor in casing 24 rotating the screw 25 and the driving means for the cutting disk 13 are started and the stone 16 will slowly and continuously be out.
Although only one form of my improved machine has been shown and described by way of illustration, it will be understood that it may be constructed in various other embodiments which do not depart from the principles of my invention and come within the scope of the appended claims.
What I claim as my invention is:
1. In a cutting machine for precious stones such as diamonds the improvement comprising in combination a stationary frame; a cutting disk mounted in the frame rotatably about a horizontal first axis; a support arm mounted in the frame swingably about a horizontal second axis; a stone holder held in the support arm in operational relation to the cutting disk; a strap hinge member including an upper flap articulated to a lower flap; said strap hinge member resting with its lower flap upon the frame shiftably in a direction substantially perpendicular to the articulation axis and perpendicular to said arm;
securing means to fix said lower flap to the frame in any of its shifted positions; an adjusting spindle screwed into said support arm and resting with its operational end upon said upper flap to set said supporting arm with the stone holder into starting operational relation to the cutting disk; and actuating means for the turnable upper flap causing the same to gradually approach the lower flap during the cutting operation, thereby causing the stone holder to uniformly approach the cutting disk during the progressing cutting operation.
2. In a cutting machine according to claim 1 actuating means for the upper flap comprising a substantially vertical rotatable screw member freely penetrating the two flaps near their free ends and a nonrotatable nut 4 .t guiding the upper flap during its gradual approach towards the lower flap.
References Cited by the Examiner UNITED STATES PATENTS member engaged by said screw member supporting and 15 HAROLD D. WHITEHEAD, Primary Examiner.

Claims (1)

1. IN A CUTTING MACHINE FOR PRECIOUS STONES SUCH AS DIAMONDS THE IMPROVEMENT COMPRISING IN COMBINATION A STATIONARY FRAME; A CUTTING DISK MOUNTED IN THE FRAME ROTATABLY ABOUT A HORIZONTAL FIRST AXIS; A SUPPORT ARM MOUNTED IN THE FRAME SWINGABLY ABOUT A HORIZONTAL SECOND AXIS; A STONE HOLDER HELD IN THE SUPPORT ARM IN OPERATIONAL RELATION TO THE CUTTING DISK; A STRAP HINGE MEMBER INCLUDING AN UPPER FLAP ARTICULATED TO A LOWER FLAP; SAID STRAP HINGE MEMBER RESTING WITH ITS LOWER FLAP UPON THE FRAME SHIFTABLY IN A DIRECTION SUBSTANTIALLY PERIPENDICULAR TO THE ARTICULATION AXIS SAID LOWER FLAP TO THE FRAME IN ANY SECURING MEANS TO FIX SAID LOWER FLAP TO THE FRAME IN ANY OF ITS SHIFTED POSITIONS; AN ADJUSTING SPINDLE SCREWED INTO SAID SUPPORT ARM AND RESTING WITH ITS OPERATIONAL END UPON AND UPPER FLAP TO SET SAID SUPPORTING ARM WITH THE STONE HOLDER INTO STARTING OPERATIONAL RELATION TO THE CUTTING DISK; AND ACTUATING MEANS FOR THE TURNABLE UPPER FLAP CAUSING THE SAME TO GRADUALLY APPROACH THE LOWER FLAP DURING THE CUTTING OPERATION, THEREBY CAUSING THE STONE HOLDER TO UNIFORMLY APPROACH THE CUTTING DISK DURING THE PROGRESSING CUTTING OPERATION.
US345385A 1964-02-17 1964-02-17 Machine for cutting precious stones Expired - Lifetime US3266476A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3486496A (en) * 1966-12-29 1969-12-30 Corning Glass Works Circular slurry saw
US3897772A (en) * 1974-11-12 1975-08-05 Joseph Averbuch Machine for cutting precious stones
US3954096A (en) * 1972-12-01 1976-05-04 Ceskoslovenska Akademie Ved Method of working, forming and finishing single crystals
NL7802572A (en) * 1977-03-09 1978-09-12 Gersoran Sa MACHINE FOR CUTTING GEMSTONES.
WO1986005435A1 (en) * 1985-03-11 1986-09-25 Daya Ranjith Senanayake Cleaving machine
US5339795A (en) * 1991-12-31 1994-08-23 Stone Panels, Inc. Method for cutting stone laminate panels

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL15000C (en) *
BE520607A (en) *
US732118A (en) * 1902-03-27 1903-06-30 Ernest G H Schenck Machine for cutting precious stones.
FR440767A (en) * 1912-02-29 1912-07-20 Joseph Pillois Gemstone Sawing Machine
GB611898A (en) * 1946-05-13 1948-11-04 Samuel Jacobs Improvements in and relating to machines for sawing diamonds and other gem stones

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL15000C (en) *
BE520607A (en) *
US732118A (en) * 1902-03-27 1903-06-30 Ernest G H Schenck Machine for cutting precious stones.
FR440767A (en) * 1912-02-29 1912-07-20 Joseph Pillois Gemstone Sawing Machine
GB611898A (en) * 1946-05-13 1948-11-04 Samuel Jacobs Improvements in and relating to machines for sawing diamonds and other gem stones

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3486496A (en) * 1966-12-29 1969-12-30 Corning Glass Works Circular slurry saw
US3954096A (en) * 1972-12-01 1976-05-04 Ceskoslovenska Akademie Ved Method of working, forming and finishing single crystals
US3897772A (en) * 1974-11-12 1975-08-05 Joseph Averbuch Machine for cutting precious stones
NL7802572A (en) * 1977-03-09 1978-09-12 Gersoran Sa MACHINE FOR CUTTING GEMSTONES.
WO1986005435A1 (en) * 1985-03-11 1986-09-25 Daya Ranjith Senanayake Cleaving machine
US5339795A (en) * 1991-12-31 1994-08-23 Stone Panels, Inc. Method for cutting stone laminate panels

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