| 摘要 |
A lapidary holder including an attachment for generating different types of cuts or facets on non-circular stones in a semi-automatic manner, such holder including a vertical mast extending upwardly from a base, a body member mounted on the mast for axial movement, a shaft rotatably mounted on the body member and extending outwardly at an angle to the mast, for mounting a stone at its outer end, and a first indexing wheel associated with the shaft for adjusting the circumferential position of the shaft relative to the body member, such attachment including a second indexing wheel on the mast, a cam mounted relative to the body member and a cam follower on the indexing wheel for adjusting the height of the body member on the mast, whereby different cuts may be generated on a stone by coordinating the settings of the two indexing wheels.
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