Apparatus and method for cone shaping the crown and pavilion of

Stone working – Precious stone working

Patent

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51283R, 28D 500, B28D 500

Patent

active

052938581

ABSTRACT:
Apparatus and methods for simultaneously cone cutting of crown portions and pavilions of gemstones are provided by the present invention. Each of the gemstones to be simultaneously cut are individually mounted in a motor rotating collet which is mounted on a base plate. One of the base plates is provided with additional motor-driven apparatus to move the plate at an angle of approximately 45.degree. to the axial center line of the gemstone. The second gemstone is rotated by a motor attached to the collet by a support plate. The support plate moves in a direction toward the first gemstone at an angle approximately 45.degree. to the axial center line of the second gemstone and, such that, it is perpendicular to the back and forth motion provided by the motor apparatus of the first gemstone. In this manner, each of the gemstones are simultaneously coned shaped at first its crown portion and then at its pavilion portion or visa versa.

REFERENCES:
patent: 172589 (1876-01-01), Stover
patent: 1105356 (1914-07-01), Ludlow et al.
patent: 2332574 (1943-10-01), Hopp
patent: 3202147 (1965-08-01), Roos
patent: 3568368 (1971-03-01), Gwircman
patent: 4425900 (1984-01-01), Bosschaert

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