Optical machine tool alignment indicator
Abstract
Abstract AN OPTICAL GAUGING INSTRUMENT FOR CHECKING THE ALIGNMENT OF A MACHINE ELEMENT SUCH AS THE ELECTRODE OF AN ELECTRICAL DISCHARGE MACHINE, COMPRISING A LIGHT SOURCE WHICH PROVIDES A BEAM OF LIGHT PROJECTED ALONG A PATH TO FALL UPON A VIEWING SCREEN. THE ELECTRODE IS LOCATED IN THE PATH OF THE BEAM WHEREBY AN IMAGE THEREOF IS PROJECTED ON THE SCREEN. A LENS, OR LENES, ARE POSITIONED BETWEEN THE LIGHT SOURCE AND ELECTRODE TO CONCENTRATE THE BEAM ON THE ELECTRODE, AND A PROJECTION LENS MAY BE POSITIONED BETWEEN THE ELECTRODE AND SCREEN FOR PRODUCING AN ENLARGED IMAGE ON THE SCREEN. THE SCREEN PREFERABLY IS MOVABLE AND MAY BE POSITIONED AT AN OBLIQUE ANGLE WITH THE OPTICAL AXIS OF THE SYSTEM FOR FURTHER ENLARGEMENT OF AT LEAST ONE DIMENSION OF THE ELECTRODE IMAGE ON THE SCREEN.
Inventors
- 👤 Alfred G Boissevain
- 👤 Byron W Nelson
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |