Faceting machine
Abstract
Abstract A FACETING MACHINE ACCORDING TO THE PRESENT INVENTION IS CAPABLE OF AUTOMATICALLY SETTING DIFFERENT CUTTING ANGLES OR POLISHING ANGLES OF DIFFERENT FACETS. THE FACETING MACHINE INCLUDES A STATIONARY PROTRACTOR, AN ANGLE SETTING PLATE ROTATABLE ON THE SURFACE OF THE PROTRACTOR ABOUT A SHAFT, A FASTENING MEANS TO FASTEN THE ANGLE SETTING PLACE TO SAID PROTRACTOR AT A DESIRED ANGULAR POSITION, AND A BEARING BLOOCK ROTATABLY CARRYING A FACETER SPINDLE AND SECURED TO SAID SHAFT. THE FACETER SPINDLE IS SWINGABLE ON THE SURFACE OF THE ANGLE SETTING PLACE ABOUT THE SHAFT WHILE BEING ROTATABLE ABOUT ITS OWN AXIS. THE FACETER SPINDLE HAS A DOP STICK AXIALLY SECURED TO ONE END THEREOF FOR HOLDING A GEMSTONE BEING CUT OR POLISHED AND A CAM BLOCK SECURED TO THE OPPOSITE END THEREOF. THE CAM BLOCK ROTATES TOGETHER WITH SAID FACETER SPINDLE AND HAS A CIRCULAR CROSS SECTION AT A PORTION THEREOF AND NON-CIRCULAR CROSS SECTIONS AT OTHER PORTIONS THEREOF. THE ANGLE SETTING PLATE HAS A CAM FOLLOWER TO BE SECURED THERETO AT A SELECTED POSITION THEREOF SO AS TO BE KEPT IN CONTACT WITH THE PERIPHERAL SURFACE OF SAID CAM BLOCK.
Inventors
- 👤 Takahiro Imahashi
Bibliographic Details
Claims Analysis
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |