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US3105152A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inspection of sheet materials by photoelectric means
Assignee: Individual
•
Filing: 1960-01-08
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Granted: 1963-09-24
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Expires: 1980-01-08
Abstract
No abstract record available.
Inventors
- 👤 Nash Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:36
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/84; G01N21/88; G01N21/89
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
APPARATUS FOR DETECTING DEFECTS IN SHEETS OF NONOPAQUE MATERIAL COMPRISING AN INSPECTION STATION, MEANS FOR MOVING SAID MATERIAL PAST SAID INSPECTION STATION, FIRST ILLUMINATION MEANS ILLUMINATING ONE SURFACE OF A SECTION OF SAID MATERIAL PASSING SAID INSPECTION STATION, SAID SECTION EXTENDING TRANSVERSELY TO THE DIRECTION OF MOTION OF SAID MATERIAL PAST SAID STATION, MEANS AT SAID INSPECTION STATION, INCLUDING AT LEAST ONE PHOTOELECTRIC DEVICE FOR PRODUCING AN ELECTRIC SIGNAL SUBSTANTIALLY ONLY IN RESPONSE TO VARIATIONS IN THE INTENSITY OF THE DIFFUSED LIGHT EMANATING FROM SAID SECTION FALLING UPON SAID PHOTOELECTRIC DEVICE, SECOND ILLUMINATION MEANS ILLUMINATING THE OTHER SURFACE OF SAID SECTION TO BALANCE THE ILLUMINATION OF SAID SECTION BY SAID FIRST ILLUMINATION MEANS WITH LIGHT OF SUBSTANTIALLY UNIFORM INTENSITY, AND MEANS FOR ADJUSTING SAID BALANCE TO MINIMIZE THE VARIATIONS IN SAID ELECTRIC SIGNAL DUE TO VARIATIONS IN THE TEXTURE AND COMPOSITION OF SAID MATERIAL.
Claim 2
Dependent Claim
144 words
APPARATUS FOR DETECTING DEFECTS IN SHEETS OF NONOPAQUE MATERIAL COMPRISING AN INSPECTION STATION, MEANS FOR MOVING SAID MATERIAL PAST SAID INSPECTION STATION, FIRST ILLUMINATION MEANS ILLUMINATING ONE SURFACE OF A SECTION OF SAID MATERIAL PASSING SAID INSPECTION STATION, SAID SECTION EXTENDING TRANSVERSELY TO THE DIRECTION OF MOTION OF SAID MATERIAL PAST SAID STATION, MEANS AT SAID INSPECTION STATION, INCLUDING AT LEAST ONE PHOTOELECTRIC DEVICE FOR PRODUCING AN ELECTRIC SIGNAL SUBSTANTIALLY ONLY IN RESPONSE TO VARIATIONS IN THE INTENSITY OF THE DIFFUSED LIGHT EMANATING FROM SAID SECTION FALLING UPON SAID PHOTOELECTRIC DEVICE, SECOND ILLUMINATION MEANS ILLUMINATING THE OTHER SURFACE OF SAID SECTION TO BALANCE THE ILLUMINATION OF SAID SECTION BY SAID FIRST ILLUMINATION MEANS WITH LIGHT OF SUBSTANTIALLY UNIFORM INTENSITY, AND MEANS FOR ADJUSTING SAID BALANCE TO MINIMIZE THE VARIATIONS IN SAID ELECTRIC SIGNAL DUE TO VARIATIONS IN THE TEXTURE AND COMPOSITION OF SAID MATERIAL.
References 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) | 1966-09-23 | 1967-03-25 | 1967-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-23 | 1971-03-25 | 1971-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-23 | 1975-03-25 | 1975-09-24 | $7700.00 | Window Closed / Lapsed |