Device for use in polishing table facets of gems
US4237658A · kind A · utility
3Cited by
8References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 26, 1979 |
| Grant date | Dec 9, 1980 |
| Priority date | — |
| Expiry date | Jan 26, 1999 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB24B9/16
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A polishing device is described particularly useful for polishing table facets of gems, the device comprising a rotary polishing disc and a plurality of spring fingers mounted in cantilever fashion to overlie the polishing disc, with each spring finger including a pad formed with a socket adapted to receive a gem to be polished by the disc. A pressure bar urged by an electromagnet overlies the upper faces of all the spring fingers to apply a preselected, substantially uniform pressure to them during the polishing operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.