US2835886A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxygen deficiency alarm
Assignee: Consolidated Edison Company of New York Inc
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Filing: 1956-05-02
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Granted: 1958-05-20
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Expires: 1976-05-02
Abstract
No abstract record available.
Inventors
- 👤 John W Bogdanowski
- 👤 Kiuttu Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:30
CPC Classifications
F; F23; F23N; F23N5/00; F23N5/02; F23N5/08; F23N5/082; F23N5/003; F23N5/006
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
173 words
IN A SAFETY LAMP FOR DETECTING A DEFICIENCY OF OXYGEN IN THE ATMOSPHERE SURROUNDING THE LAMP FLAME SUFFICIENTLY GREAT TO IMPAIR MENTAL PROCESSES AND ENDANGER HUMAN LIFE, MEANS FOR AUDIBLY DETECTING SLIGHT REDUCTIONS IN FLAME SIZE RESULTING FROM REDUCTION IN THE OXYGEN CONTENT OF THE ATMOSPHRE, CONSISTING OF A VERTICALLY SLIDABLE, INFRA-RED IMPERMEABLE SHADE ENCLOSING SAID FLAME, SAID SHADE HAVING A PERFORATION IN ITS SIDE, A CRYSTAL PHOTO-CELL RESPONSIVE TO AND CONDUCTING IN THE PRESENCE OF THE INFRA-RED RADIATIONS, INCLUDING RADIATIONS OF A WAVE LENGTH OF ABOUT 5200 TO 7500 ANGSTROM UNITS EMITTED BY THE FLAME BURNING IN AIR POSITIONED AT SAID PERFORATION AND DIRECTED AT THE AXIS OF THE FLAME, MEANS SURROUNDING SAID CRYSTAL PHOTO-CELL AND DETACHABLY ENGAGING SAID SHADE FOR RETAINING THE CELL AND DETACHABLY ENTIONED POSITION, AN AMPLIFYING CIRCUIT FOR SAID CELL, AUDIBLE ALARM MEANS IN SAID CIRCUIT WHICH WHEN SAID CELL IS CONDUCTING ARE INOPERATIVE, AND MEANS ASSOCIATED WITH THE LAMP BODY AND SHADE FOR ADJUSTING THE SHADE IN A DIRECTION SUBSTANTIALLY PARALLEL TO THE AXIS OF THE FLAME.
Claim 2
Dependent Claim
173 words
IN A SAFETY LAMP FOR DETECTING A DEFICIENCY OF OXYGEN IN THE ATMOSPHERE SURROUNDING THE LAMP FLAME SUFFICIENTLY GREAT TO IMPAIR MENTAL PROCESSES AND ENDANGER HUMAN LIFE, MEANS FOR AUDIBLY DETECTING SLIGHT REDUCTIONS IN FLAME SIZE RESULTING FROM REDUCTION IN THE OXYGEN CONTENT OF THE ATMOSPHRE, CONSISTING OF A VERTICALLY SLIDABLE, INFRA-RED IMPERMEABLE SHADE ENCLOSING SAID FLAME, SAID SHADE HAVING A PERFORATION IN ITS SIDE, A CRYSTAL PHOTO-CELL RESPONSIVE TO AND CONDUCTING IN THE PRESENCE OF THE INFRA-RED RADIATIONS, INCLUDING RADIATIONS OF A WAVE LENGTH OF ABOUT 5200 TO 7500 ANGSTROM UNITS EMITTED BY THE FLAME BURNING IN AIR POSITIONED AT SAID PERFORATION AND DIRECTED AT THE AXIS OF THE FLAME, MEANS SURROUNDING SAID CRYSTAL PHOTO-CELL AND DETACHABLY ENGAGING SAID SHADE FOR RETAINING THE CELL AND DETACHABLY ENTIONED POSITION, AN AMPLIFYING CIRCUIT FOR SAID CELL, AUDIBLE ALARM MEANS IN SAID CIRCUIT WHICH WHEN SAID CELL IS CONDUCTING ARE INOPERATIVE, AND MEANS ASSOCIATED WITH THE LAMP BODY AND SHADE FOR ADJUSTING THE SHADE IN A DIRECTION SUBSTANTIALLY PARALLEL TO THE AXIS OF THE FLAME.
References Cited (Backward Citations)
US2567036A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-19 | 1961-11-18 | 1962-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-19 | 1965-11-18 | 1966-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-19 | 1969-11-18 | 1970-05-20 | $7700.00 | Window Closed / Lapsed |