US3336473A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lighting fixture with auxiliary lamp
Assignee: ART METAL LIGHTING DIVISION
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Filing: 1965-09-13
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Granted: 1967-08-15
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Expires: 1985-09-13
Abstract
No abstract record available.
Inventors
- 👤 Buzan Morris Milton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 04:42
CPC Classifications
F; F21; F21V; F21V23/00; F21V23/04; F21V23/0442; F21S; F21S8/00; F21S8/02; F21S9/00; F21S9/02; F21S9/022; H; H05; H05B; H05B39/00; H05B39/04; F21Y; F21Y2113/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
A LIGHTING FIXTURE COMPRISING A HOUSING, A PAIR OF LAMPS MOUNTED IN SAID HOUSING, ONE OF SAID LAMPS BEING NORMALLY LIGHTED AND THE OTHER ONE UNLIGHTED, AND A LIGHT SENSITIVE SWITCHING MEANS ALSO MOUNTED IN SAID HOUSING FOR DETECTING THE LIGHT INTENSITY EMITTED FROM SAID ONE LAMP, SAID LIGHT SENSITIVE SWITCHING MEANS BEING OPERATIVE INSTANTLY TO SWITCH SAID OTHER LAMP ON WHEN THE LIGHT INTENSITY FROM SAID ONE LAMP DROPS BELOW A PREDETERMINED LEVEL, AND INSTANTLY SWITCH SAID OTHER LAMP OUT WHEN THE LIGHT INTENSITY FROM SAID ONE LAMP IS ABOVE SUCH PREDETERMINED LEVEL, THEREBY ENSURING CONTINUOUS ILLUMINATION AT ALL TIMES OF AN INTENSITY AT LEAST AS GREAT AS SAID OTHER LAMP.
Claim 2
Dependent Claim
112 words
A LIGHTING FIXTURE COMPRISING A HOUSING, A PAIR OF LAMPS MOUNTED IN SAID HOUSING, ONE OF SAID LAMPS BEING NORMALLY LIGHTED AND THE OTHER ONE UNLIGHTED, AND A LIGHT SENSITIVE SWITCHING MEANS ALSO MOUNTED IN SAID HOUSING FOR DETECTING THE LIGHT INTENSITY EMITTED FROM SAID ONE LAMP, SAID LIGHT SENSITIVE SWITCHING MEANS BEING OPERATIVE INSTANTLY TO SWITCH SAID OTHER LAMP ON WHEN THE LIGHT INTENSITY FROM SAID ONE LAMP DROPS BELOW A PREDETERMINED LEVEL, AND INSTANTLY SWITCH SAID OTHER LAMP OUT WHEN THE LIGHT INTENSITY FROM SAID ONE LAMP IS ABOVE SUCH PREDETERMINED LEVEL, THEREBY ENSURING CONTINUOUS ILLUMINATION AT ALL TIMES OF AN INTENSITY AT LEAST AS GREAT AS SAID OTHER LAMP.
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) | 1970-08-14 | 1971-02-13 | 1971-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-14 | 1975-02-13 | 1975-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-14 | 1979-02-13 | 1979-08-15 | $7700.00 | Window Closed / Lapsed |