US3158748A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic surface inspection system employing full frame scanning
Assignee: Jones and Laughlin Steel Corp
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Filing: 1961-11-21
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Granted: 1964-11-24
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Expires: 1981-11-21
Abstract
No abstract record available.
Inventors
- 👤 Laycak John Francis
- 👤 Domina Angelo
- 👤 Langman Reginald David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:26
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/84; G01N21/88; G01N21/89
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
IN APPARATUS FOR DETECTING DEFECTS ON THE SURFACE OF MOVING MATERIAL IN WHICH THE DEFECTS HAVING A DIFFERENT OPTICAL APPEARANCE THAN THE REMAINDER OF THE MATERIAL, THE COMBINATION OF MEANS INCLUDING AN ELECTRON-OPTICS DEVICE FOR FULL FRAME SCANNING AN IMAGE OF THE SURFACE OF SAID MOVING MATERIAL WITH AN ELECTRON BEAM WHEREIN THE BEAM SCANS TRANSVERSE AND SUBSTANTIALLY PARALLEL TO THE DIRECTION OF MOVEMENT OF THE MATERIAL, THE OUTPUT OF THE ELECTRON-OPTICS DEVICE BEING A PULSED SIGNAL IN WHICH A PULSE IS PRODUCED EACH TIME THE ELECTRON BEAM SCANS OVER A DEFECT, AND MEANS FOR COUNTING AT LEAST PART OF THE PULSES AT THE OUTPUT OF SAID ELETCRON-OPTICS DEVICE TO OBTAIN AN INDICATION OF THE SURFACE CONDITION OF SAID MATERIAL.
Claim 2
Dependent Claim
120 words
IN APPARATUS FOR DETECTING DEFECTS ON THE SURFACE OF MOVING MATERIAL IN WHICH THE DEFECTS HAVING A DIFFERENT OPTICAL APPEARANCE THAN THE REMAINDER OF THE MATERIAL, THE COMBINATION OF MEANS INCLUDING AN ELECTRON-OPTICS DEVICE FOR FULL FRAME SCANNING AN IMAGE OF THE SURFACE OF SAID MOVING MATERIAL WITH AN ELECTRON BEAM WHEREIN THE BEAM SCANS TRANSVERSE AND SUBSTANTIALLY PARALLEL TO THE DIRECTION OF MOVEMENT OF THE MATERIAL, THE OUTPUT OF THE ELECTRON-OPTICS DEVICE BEING A PULSED SIGNAL IN WHICH A PULSE IS PRODUCED EACH TIME THE ELECTRON BEAM SCANS OVER A DEFECT, AND MEANS FOR COUNTING AT LEAST PART OF THE PULSES AT THE OUTPUT OF SAID ELETCRON-OPTICS DEVICE TO OBTAIN AN INDICATION OF THE SURFACE CONDITION OF SAID MATERIAL.
References Cited (Backward Citations)
US2731200A
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US3019972A
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US2975293A
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US3088036A
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US3019346A
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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) | 1967-11-24 | 1968-05-25 | 1968-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-24 | 1972-05-25 | 1972-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-24 | 1976-05-25 | 1976-11-24 | $7700.00 | Window Closed / Lapsed |