Abrasive tool making process – material – or composition – Impregnating or coating an abrasive tool
Patent
1986-05-15
1987-09-08
Parker, Roscoe V.
Abrasive tool making process, material, or composition
Impregnating or coating an abrasive tool
29559, B23Q 700
Patent
active
046914811
ABSTRACT:
A jig for transferring a partially faceted gemstone from a first dopstick to a second dopstick, without altering the spatial relativity to the faceting device so that the unfinished gemstone can be faceted. The jig comprises two grooved blocks, and associated clamps. One block is located at each end of a base portion, with a swivelable pawl mounted in a slot at each end of the base portion. A first dopstick with a partially faceted gemstone cemented to one end, and a calibrated, notched indexing gear fastened to the other end, is removed from the faceting device, placed in one of the blocks, with the gear end adjacent to a pawl. The pawl is swiveled into contact with the gear; the dopstick is rotated until the pawl engages a gear knotch; the engaged knotch is noted, and the dopstick is secured to the block with its associated clamp. A second dopstick is placed in the other block, moved into contact with the gemstone, cemented thereto, and firmly secured with its associated clamp. The gear is thereafter transferred from the first to second dopstick where it is loosely fastened and rotated until its adjacent pawl can be swiveled into the knotch previously engaged by the first pawl. The gear is fastened on the dopstick, and the cemented connection between the gemstone and the first dopstick is severed. The second dopstick with attached gemstone is thereafter removed from the transfer jig, oriented in the faceting device, and faceting completed.
REFERENCES:
patent: 2724220 (1955-11-01), Shaw
patent: 3098327 (1963-07-01), Malin
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