US3307608A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame-monitoring system
Assignee: Individual
•
Filing: 1965-10-05
•
Granted: 1967-03-07
•
Expires: 1985-10-05
Abstract
No abstract record available.
Inventors
- 👤 Cowan Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:56
CPC Classifications
G; G08; G08B; G08B17/00; G08B17/12; F; F23; F23N; F23N5/00; F23N5/02; F23N5/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
232 words
IN COMBINATION, A FLAME PRODUCING BURNER, A MONITORING SYSTEM FOR THE FLAME OF SAID BURNER AND COMPRISING A FLAME SENSING DEVICE AND A METER CONNECTED IN SERIES ACROSS AN ELECTRICAL CIRCUIT, THE SENSING DEVICE OPERATIVELY ASSOCIATED WITH THE MONITORED FLAME TO RELATE FLAME INTENSITY TO AN ELECTRICAL RESISTANCE, THE METER HAVING AN INDICATOR WHICH IS ARRANGED TO MOVE IN RESPONSE TO THE RESISTANCE OF THE SENSING DEVICE, A FUEL VALVE OPERATIVELY CONNECTED TO THE BURNER, CLOSURE MEANS NORMALLY TENDING TO CLOSE THE FUEL VALVE, THE METER INCLUDING A FIRST NORMALLY CLOSED LOW-RESISTANCE SWITCH OPERATIVELY CONNECTED TO THE FUEL VALVE AND ARRANGED TO OPEN ON THE MOVEMENT OF THE INDICATOR BELOW A PREDETERMINED LOW-RESISTANCE LEVEL SO THAT THE FUEL VALVE IS ALLOWED TO CLOSE THEREBY SHUTTING THE BURNER DOWN, A FLAME-OUT ALARM, THE METER INCLUDING A FIRST NORMALLY OPEN LOW-RESISTANCE SWITCH OPERATIVELY CONNECTED TO THE FLAME-OUT ALARM AND ARRANGED TO CLOSE ON THE MOVEMENT OF THE INDICATOR BELOW THE LOW-RESISTANCE LEVEL TO ENERGIZE THE FLAME-OUT ALARM, A FLAME-ON LAMP AND A FLAME-OUT LAMP, SAID FIRST NORMALLY OPEN LOW-RESISTANCE SWITCH OPERATIVELY CONNECTED TO THE FLAME-OUT LAMP AND ARRANGED TO CLOSE ON THE MOVEMENT OF THE INDICATOR BELOW THE LOW-RESISTANCE LEVEL TO LIGHT THE FLAME-OUT LAMP, THE METER INCLUDING A NORMALLY OPEN HIGH-RESISTANCE SWITCH OPERATIVELY CONNECTED TO A FAULT LAMP AND ARRANGED TO CLOSE ON THE MOVEMENT OF THE INDICATOR ABOVE A PREDETERMINED HIGH-RESISTANCE LEVEL.
Claim 2
Dependent Claim
232 words
IN COMBINATION, A FLAME PRODUCING BURNER, A MONITORING SYSTEM FOR THE FLAME OF SAID BURNER AND COMPRISING A FLAME SENSING DEVICE AND A METER CONNECTED IN SERIES ACROSS AN ELECTRICAL CIRCUIT, THE SENSING DEVICE OPERATIVELY ASSOCIATED WITH THE MONITORED FLAME TO RELATE FLAME INTENSITY TO AN ELECTRICAL RESISTANCE, THE METER HAVING AN INDICATOR WHICH IS ARRANGED TO MOVE IN RESPONSE TO THE RESISTANCE OF THE SENSING DEVICE, A FUEL VALVE OPERATIVELY CONNECTED TO THE BURNER, CLOSURE MEANS NORMALLY TENDING TO CLOSE THE FUEL VALVE, THE METER INCLUDING A FIRST NORMALLY CLOSED LOW-RESISTANCE SWITCH OPERATIVELY CONNECTED TO THE FUEL VALVE AND ARRANGED TO OPEN ON THE MOVEMENT OF THE INDICATOR BELOW A PREDETERMINED LOW-RESISTANCE LEVEL SO THAT THE FUEL VALVE IS ALLOWED TO CLOSE THEREBY SHUTTING THE BURNER DOWN, A FLAME-OUT ALARM, THE METER INCLUDING A FIRST NORMALLY OPEN LOW-RESISTANCE SWITCH OPERATIVELY CONNECTED TO THE FLAME-OUT ALARM AND ARRANGED TO CLOSE ON THE MOVEMENT OF THE INDICATOR BELOW THE LOW-RESISTANCE LEVEL TO ENERGIZE THE FLAME-OUT ALARM, A FLAME-ON LAMP AND A FLAME-OUT LAMP, SAID FIRST NORMALLY OPEN LOW-RESISTANCE SWITCH OPERATIVELY CONNECTED TO THE FLAME-OUT LAMP AND ARRANGED TO CLOSE ON THE MOVEMENT OF THE INDICATOR BELOW THE LOW-RESISTANCE LEVEL TO LIGHT THE FLAME-OUT LAMP, THE METER INCLUDING A NORMALLY OPEN HIGH-RESISTANCE SWITCH OPERATIVELY CONNECTED TO A FAULT LAMP AND ARRANGED TO CLOSE ON THE MOVEMENT OF THE INDICATOR ABOVE A PREDETERMINED HIGH-RESISTANCE LEVEL.
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) | 1970-03-06 | 1970-09-05 | 1971-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-06 | 1974-09-05 | 1975-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-06 | 1978-09-05 | 1979-03-07 | $7700.00 | Window Closed / Lapsed |