US3204091A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light source of controllable intensity
Assignee: Babcock and Wilcox Co
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Filing: 1962-09-05
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Granted: 1965-08-31
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Expires: 1982-09-05
Abstract
No abstract record available.
Inventors
- 👤 Albert J Baracket
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:13
CPC Classifications
G; G03; G03B; G03B15/00; G03B15/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
158 words
A LIGHT SOURCE COMPRISING: A FLAT DIFFUSING PLATE; A LUMINOUS ELEMENT SPACED FROM ONE SURFACE THEREOF TO DIRECT LIGHT THERETHROUGH; OPAQUE MEANS EXTENDING FROM THE EDGES OF SAID PLATE AND ENCLOSING A VOLUME THAT INCLUDES SAID LUMINOUS ELEMENT, THE INNER SURFACE OF SAID OPAQUE MEANS BEING REFLECTIVE TO INCREASE THE APPARENT INTENSITY OF SAID LUMINOUS ELEMENT; A PAIR OF FORAMINOUS SHEETS OF OPAQUE MATERIAL LOCATED ACROSS THE LIGHT PATH BETWEEN SAID LUMINOUS ELEMENT AND SAID DIFFUSING PLATE SO THAT THE LIGHT TRAVELLING ALONG SAID PATH STRIKES SAID SHEETS, ONE OF SAID SHEETS HAVING FORAMINATIONS WITH VARYINS SPACE-SIZE PARAMETES SUBSTANTIALLY COMPLEMENTING THE INTENSITY OF LIGHT REACHING SAID SHEET FROM SAID LUMINOUS ELEMENT; AND MEANS TO MOVE ONE OF SAID SHEETS WITH RESPECT TO THE OTHER TO VARY THE RELATIVE ALIGNMENT OF FORAMINATIONS IN SAID SHEETS THEREBY TO VARY THE OVERALL INTENSITY OF LIGH PASSING THROUGH SAID SHEETS WITHOUT VARYING THE RELATIVE INTENSITY OF VARIOUS COLOR COMPONENTS OF THE LIGHT.
Claim 2
Dependent Claim
158 words
A LIGHT SOURCE COMPRISING: A FLAT DIFFUSING PLATE; A LUMINOUS ELEMENT SPACED FROM ONE SURFACE THEREOF TO DIRECT LIGHT THERETHROUGH; OPAQUE MEANS EXTENDING FROM THE EDGES OF SAID PLATE AND ENCLOSING A VOLUME THAT INCLUDES SAID LUMINOUS ELEMENT, THE INNER SURFACE OF SAID OPAQUE MEANS BEING REFLECTIVE TO INCREASE THE APPARENT INTENSITY OF SAID LUMINOUS ELEMENT; A PAIR OF FORAMINOUS SHEETS OF OPAQUE MATERIAL LOCATED ACROSS THE LIGHT PATH BETWEEN SAID LUMINOUS ELEMENT AND SAID DIFFUSING PLATE SO THAT THE LIGHT TRAVELLING ALONG SAID PATH STRIKES SAID SHEETS, ONE OF SAID SHEETS HAVING FORAMINATIONS WITH VARYINS SPACE-SIZE PARAMETES SUBSTANTIALLY COMPLEMENTING THE INTENSITY OF LIGHT REACHING SAID SHEET FROM SAID LUMINOUS ELEMENT; AND MEANS TO MOVE ONE OF SAID SHEETS WITH RESPECT TO THE OTHER TO VARY THE RELATIVE ALIGNMENT OF FORAMINATIONS IN SAID SHEETS THEREBY TO VARY THE OVERALL INTENSITY OF LIGH PASSING THROUGH SAID SHEETS WITHOUT VARYING THE RELATIVE INTENSITY OF VARIOUS COLOR COMPONENTS OF THE LIGHT.
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) | 1968-08-30 | 1969-03-01 | 1969-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-30 | 1973-03-01 | 1973-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-30 | 1977-03-01 | 1977-08-31 | $7700.00 | Window Closed / Lapsed |