Automatic inspection of profiles
Abstract
Abstract THIS INVENTION RELATES TO AUTOMATIC INSPECTION OF PROFILES REGULARLY PROJECTING FROM A BODY, EXAMPLES OF WHICH ARE THE INSPECTION OF SCREW THREADS OR GEAR TEETH. IN ACCORDANCE WITH THE INVENTION, A MAGNIFIED IMAGE OF THE PROFILE IS PROJECTED ONTO A RECEIVING SURFACE THAT INCLUDES PAIRS OF PHOTOELECTRIC CELLS DISPOSED IN POSITIONS RELATIVELY INDICATIVE OF UNDERSIZE AND OVERSIZE DIMENSIONS OF AN IDEAL PROFILE. THSES PHOTOELECTRIC CELLS THEN ESTABLISH A DECISION IN ELECTRONIC LOGICAL CIRCUITS TO WHICH THEY ARE CONNECTED THAT THE PROFILE IS WITHIN PREDETERMINED GAUGING LIMITS. A "READ NOW" SIGNAL IS ANNOUNCED TO THE LOGICAL CIRCUITS BY A TRIGGER DEVICE ALSO DISPOSED IN OR ON SAID SURFACE.
Inventors
- 👤 David B Foster
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) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |