US3286185A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame detector system responsive to spike produced by townsend avalanche of glow discharge tube
Assignee: Combustion Engineering Inc
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Filing: 1965-10-22
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Granted: 1966-11-15
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Expires: 1985-10-22
Abstract
No abstract record available.
Inventors
- 👤 Lyman F Gilbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:59
CPC Classifications
F; F23; F23N; F23N5/00; F23N5/02; F23N5/08; F23N5/082; F23N2229/00; F23N2229/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
A FLAME DETECTOR INCLUDING AN ELECTRIC CIRCUIT HAVING A GLOW DISCHARGE SENSING TUBE OPERATING OUT OF SATURATION GENERATING PULSES INCIDENT TO AVALANCHE OCCURING IN THE TUBE, MEANS SELECTIVELY RESPONSIVE TO SAID PULSE SIGNALS OPERATIVE TO PRODUCE AN OUTPUT SIGNAL OF RANDOM REPETITION RATE AND MEANS PROVIDING AN INDICATION WHEN THE OUTPUT SIGNAL IS OF A FREQUENCY DIFFERENT FROM THE RANDOMLY VARYING FREQUENCY.
Claim 2
Dependent Claim
62 words
A FLAME DETECTOR INCLUDING AN ELECTRIC CIRCUIT HAVING A GLOW DISCHARGE SENSING TUBE OPERATING OUT OF SATURATION GENERATING PULSES INCIDENT TO AVALANCHE OCCURING IN THE TUBE, MEANS SELECTIVELY RESPONSIVE TO SAID PULSE SIGNALS OPERATIVE TO PRODUCE AN OUTPUT SIGNAL OF RANDOM REPETITION RATE AND MEANS PROVIDING AN INDICATION WHEN THE OUTPUT SIGNAL IS OF A FREQUENCY DIFFERENT FROM THE RANDOMLY VARYING FREQUENCY.
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) | 1969-11-14 | 1970-05-16 | 1970-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-14 | 1974-05-16 | 1974-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-14 | 1978-05-16 | 1978-11-15 | $7700.00 | Window Closed / Lapsed |