US3081665A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for optical inspection of glass sheets
Assignee: Libbey Owens Ford Glass Co
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Filing: 1959-04-21
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Granted: 1963-03-19
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Expires: 1979-04-21
Abstract
No abstract record available.
Inventors
- 👤 Charles H Griss
- 👤 Morris F Brillhart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:31
CPC Classifications
G; G01; G01B; G01B11/00; G01B11/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
A METHOD OF INSPECTING GLASS SHEETS FOR THE PRESENCE OF WEDGE IN AREAS THEREOF, COMPRISING THE STEPS OF ANGULARLY DIRECTING A LIGHT BEAM THROUGH A GLASS SHEET TO BE INSPECTED, FOCUSING SAID LIGHT BEAM ONTO AN OPAQUE SCREEN OF A DIMENSION SLIGHTLY LARGER THAN SAID FOCUSED BEAM SO THAT ANY WEDGE PRESENT IN THE GLASS WILL DEVIATE THE BEAM OUTWARDLY OF SAID SCREEN, IMPINGING SAID BEAM FALLING OUTWARDLY OF SAID SCREEN ONTO INDIVIDUAL LIGHT SENSITIVE MEANS TO PRODUCE A PLURALITY OF INDEPENDENT ELECTRIC SIGNALS PROPORTIONAL TO THE AMOUNT OF LIGHT INCIDENT ON EACH SAID LIGHT SENSITIVE MEANS, PERIODICALLY INTERRUPTING THE ELECTRIC SIGNAL PRODUCED BY EACH SAID LIGHT SENSITIVE MEANS, AND MEASURING THE RELATIVE VALUES OF THE INTERRUPTED ELECTRICAL SIGNALS GENERATED BY THE INDIVIDUAL LIGHT SENSITIVE MEANS TO DETERMINE THE AMOUNT AND DIRECTION OF WEDGE IN THE GLASS SHEET BEING INSPECTED.
Claim 2
Independent Claim
140 words
A METHOD OF INSPECTING GLASS SHEETS FOR THE PRESENCE OF WEDGE IN AREAS THEREOF, COMPRISING THE STEPS OF ANGULARLY DIRECTING A LIGHT BEAM THROUGH A GLASS SHEET TO BE INSPECTED, FOCUSING SAID LIGHT BEAM ONTO AN OPAQUE SCREEN OF A DIMENSION SLIGHTLY LARGER THAN SAID FOCUSED BEAM SO THAT ANY WEDGE PRESENT IN THE GLASS WILL DEVIATE THE BEAM OUTWARDLY OF SAID SCREEN, IMPINGING SAID BEAM FALLING OUTWARDLY OF SAID SCREEN ONTO INDIVIDUAL LIGHT SENSITIVE MEANS TO PRODUCE A PLURALITY OF INDEPENDENT ELECTRIC SIGNALS PROPORTIONAL TO THE AMOUNT OF LIGHT INCIDENT ON EACH SAID LIGHT SENSITIVE MEANS, PERIODICALLY INTERRUPTING THE ELECTRIC SIGNAL PRODUCED BY EACH SAID LIGHT SENSITIVE MEANS, AND MEASURING THE RELATIVE VALUES OF THE INTERRUPTED ELECTRICAL SIGNALS GENERATED BY THE INDIVIDUAL LIGHT SENSITIVE MEANS TO DETERMINE THE AMOUNT AND DIRECTION OF WEDGE IN THE GLASS SHEET BEING INSPECTED.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-03-18 | 1966-09-17 | 1967-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-18 | 1970-09-17 | 1971-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-18 | 1974-09-17 | 1975-03-19 | $7700.00 | Window Closed / Lapsed |