US3091724A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame detection circuit
Assignee: Electronics Corp of America
•
Filing: 1960-03-08
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Granted: 1963-05-28
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Expires: 1980-03-08
Abstract
No abstract record available.
Inventors
- 👤 Giuffrida Philip
- 👤 Pratt John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:38
CPC Classifications
F; F23; F23N; F23N5/00; F23N5/02; F23N5/12; F23N5/123; F23N2229/00; F23N2229/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
181 words
A FLAME DETECTION CIRCUIT COMPRISING A TRANSFORMER HAVING PRIMARY AND SECONDARY WINDINGS, SAID SECONDARY WINDING HAVING FIRST AND SECOND OUTER TERMINALS AND A TAP, A GLOW DISCHARGE TRIGGER TUBE HAVING AN ANODE, A CATHODE, AND A STARTER ELECTRODE, MEANS TO CONNECT THE CATHODE OF SAID TUBE TO THE FIRST OUTER TERMINAL O SAID TRANSFORMER, MEANS INCLUDING RELAY COIL TO CONNECT THE ANODE OF SAID TUBE TO SAID TRANSFORMER TAP, A CAPACITOR HAVING TWO TERMINALS, MEANS TO CONNECT ONE TERMINAL OF SAID CAPACITOR TO THE FIRST OUTER TERMINAL OF SAID TRANSFORMER, A DEVICE WHICH CONDUCTS UNILATERALLY IN THE PRESENCE OF A FLAME, MEANS INCLUDING A RESISTANCE TO CONNECT SAID DEVICE BETWEEN THE OTHER TERMINAL OF SAID CAPACITOR AND THE SECOND OUTER TERMINAL OF SAID TRANSFORMER AND WITH SUCH POLARITY THAT IN THE PRESENCE OF FLAME THERE IS A NET FLOW OF ELECTRONS FROM THE SECOND OUTER TERMINAL OF SAID TRANSFORMER TO THE OUTER TERMINAL OF SAID CAPACITOR A RESISTANCE CONNECTED BETWEEN THE OTHER TERMINAL OF SAID CAPACITOR AND SAID STARTER ELECTRODE AND A CAPACITOR CONNECTED BETWEEN SAID STARTER ELECTRODE AND SAID CATHODE.
Claim 2
Dependent Claim
181 words
A FLAME DETECTION CIRCUIT COMPRISING A TRANSFORMER HAVING PRIMARY AND SECONDARY WINDINGS, SAID SECONDARY WINDING HAVING FIRST AND SECOND OUTER TERMINALS AND A TAP, A GLOW DISCHARGE TRIGGER TUBE HAVING AN ANODE, A CATHODE, AND A STARTER ELECTRODE, MEANS TO CONNECT THE CATHODE OF SAID TUBE TO THE FIRST OUTER TERMINAL O SAID TRANSFORMER, MEANS INCLUDING RELAY COIL TO CONNECT THE ANODE OF SAID TUBE TO SAID TRANSFORMER TAP, A CAPACITOR HAVING TWO TERMINALS, MEANS TO CONNECT ONE TERMINAL OF SAID CAPACITOR TO THE FIRST OUTER TERMINAL OF SAID TRANSFORMER, A DEVICE WHICH CONDUCTS UNILATERALLY IN THE PRESENCE OF A FLAME, MEANS INCLUDING A RESISTANCE TO CONNECT SAID DEVICE BETWEEN THE OTHER TERMINAL OF SAID CAPACITOR AND THE SECOND OUTER TERMINAL OF SAID TRANSFORMER AND WITH SUCH POLARITY THAT IN THE PRESENCE OF FLAME THERE IS A NET FLOW OF ELECTRONS FROM THE SECOND OUTER TERMINAL OF SAID TRANSFORMER TO THE OUTER TERMINAL OF SAID CAPACITOR A RESISTANCE CONNECTED BETWEEN THE OTHER TERMINAL OF SAID CAPACITOR AND SAID STARTER ELECTRODE AND A CAPACITOR CONNECTED BETWEEN SAID STARTER ELECTRODE AND SAID CATHODE.
References Cited (Backward Citations)
US2112736A
Cited
US2343001A
Cited
US2352240A
Cited
US2360532A
Cited
US2971136A
Cited
US2870329A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-05-27 | 1966-11-26 | 1967-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-27 | 1970-11-26 | 1971-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-27 | 1974-11-26 | 1975-05-28 | $7700.00 | Window Closed / Lapsed |