Abstract: A method and an apparatus are disclosed wherein works may be finished magnetically by media by utilizing the interaction of the works and media placed within the generated alternating magnetic fields. A method of finishing works magnetically comprises generating multiple alternating magnetic fields and combining them to provide combined alternating magnetic fields covering a specific extensive region and placing media and works in their free motion within those alternating magnetic fields. An apparatus for finishing works magnetically comprises a plurality of alternating magnetic filed generator units each including a plurality of magnets, wherein any combination of those units provides combined alternating magnetic fields within which works and media are placed, with at least the media being placed in its free motion.

Abstract: A magnetic barrel finishing machine causes multiple different flows or motions of the abrasive media and workpieces by varying magnetic fields, thereby freeing the workpieces from the abrasive media and subjecting the workpieces to finishing action by the abrasive media. The machine includes a rotator made of magnetic material and a plurality of permanent magnets rigidly mounted on the rotator. A container is located above the rotator with a small gap therebetween, and contains workpieces to be finished and an abrasive medium of magnetic material, or workpieces to be finished and an abrasive medium including a magnetic material. The permanent magnets are arranged irregularly in such a way that they provide magnetic lines of force acting in the circumferential direction as well as the radial direction of the rotator.

Abstract: A magnetic barrel finishing machine includes multiple different flows or motions of an abrasive medium and workpieces by varying magnetic fields, freeing the workpieces from the abrasive medium and subjecting the workpieces to a finishing action with the abrasive medium. The machine includes a rotary disk made of nonferromagnetic material, a plurality of permanent magnets rigidly mounted on the rotary disk, and a container located above the rotary disk with a small gap therebetween for containing the abrasive medium and the workpieces being finished thereby. The permanent magnets are arranged irregularly such that they provide magnetic lines of force acting in a circumferential direction as well as in a radial direction of the rotary disk.

Abstract: A work holding apparatus is used in grinding and polishing very hard and brittle tools, such as monocrystalline or polycrystalline diamond tools, diamond indenters, diamond knives, etc.The work holding apparatus includes a support member to be mounted on the work table, and work operating devices capable of vertical movement, capable of forward and backward movement, and capable of swing motion about a horizontal shaft and which are all connected one after another to the support member. The swing device is connected to a swing arm, to which a tool holder is attached via the vertical movement device and swivel device.

Abstract: A work holding apparatus is used in grinding and polishing very hand and brittle tools, such as monocrystalline or polycrystalline diamond tools, diamond indenters, diamond knives, etc.The work holding apparatus includes a support member to be mounted on the work table, and work operating devices including a mechanism capable of vertical movement, a mechanism capable of forward and backward movement, and a mechanism capable of swing motion about a horizontal shaft and which are all connected one after another to the support member. The swing device is connected to a swing arm, to which a tool holder is attached via the vertical movement device and swivel device.

Abstract: A cabochon copy grinding apparatus comprises a flexible template of a variable curvature, a template supporting ring the template head head of an adjustable holding distance, a grinding wheel, a master cabochon attaching shaft, a workpiece attaching shaft, and an interlocking device for operatively connecting the master cabochon attaching shaft and the workpiece attaching shaft. The cabochon copy grinding apparatus can grind a workpiece such as a precious stone by copying a master cabochon as a model at a high fidelity.

Abstract: Interchangeable faceting apparatus comprises a reversible dual indexing mechanism consisting of a primary indexing gear with a small number of notches and an auxiliary indexing gear controlling the primary gear, and a height adjusting mechanism which permits a faceter frame to be precisely positioned with respect to the lap surface at any height of the faceter frame. The primary indexing gear with a relatively small number of notches engaged by a spring trigger provide subdivided indexes by the action of the auxiliary indexing gear.