US3611282A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flameout detector
Assignee: RTX Corp
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Filing: 1969-08-08
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Granted: 1971-10-05
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Expires: 1989-08-08
Abstract
Abstract A flameout detector for aircraft having a plurality of jet engines comprises a corresponding plurality of transducers, each providing an output voltage in accordance with a turbinedischarge pressure. The transducer outputs are compared to determine the maximum and minimum voltages. If the ratio of the minimum to the maximum voltage is appreciably less than unity, a warning signal is provided to indicate that a flameout has occurred in one of the engines. The minimum voltage is compared with each of the transducer outputs to identify the particular engine which is malfunctioning.
Inventors
- 👤 Stanley J Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:09
CPC Classifications
F; F02; F02C; F02C7/00; F02C7/26; F02C7/262
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
78 words
A flameout detector for an aircraft having a plurality of jet engines including in combination a corresponding plurality of turbine-discharge-pressure transducers each providing an output means responsive to the outputs for determining the minimum turbine-discharge pressure, means responsive to the outputs for determining the maximum turbine-discharge pressure, means for determining the ratio of said minimum to said maximum pressure, and means operable in response to a value of said ratio appreciably less than unity for providing a signal.
Claim 2
Dependent Claim
78 words
A flameout detector for an aircraft having a plurality of jet engines including in combination a corresponding plurality of turbine-discharge-pressure transducers each providing an output means responsive to the outputs for determining the minimum turbine-discharge pressure, means responsive to the outputs for determining the maximum turbine-discharge pressure, means for determining the ratio of said minimum to said maximum pressure, and means operable in response to a value of said ratio appreciably less than unity for providing a signal.
Claim 3
Dependent Claim
14 words
A detector as in claim 1 wherein the minimum-pressure-determining means comprises an OR Circuit.
Claim 4
Dependent Claim
14 words
A detector as in claim 1 wherein the maximum-pressure-determining means comprises an OR circuit.
Claim 5
Dependent Claim
44 words
A detector as in claim 1 wherein the minimum-pressure-determining means comprises a corresponding plurality of similarly polarized first diodes, wherein the maximum-pressure-determining means comprises a corresponding plurality of similarly polarized second diodes, and wherein the first diodes are polarized oppositely to the second diodes.
Claim 6
Dependent Claim
22 words
A detector as in claim 1 wherein the ratio-determining means includes means for determining the difference between said maximum and minimum pressures.
Claim 7
Dependent Claim
27 words
A detector as in claim 1 wherein the ratio-determining means includes a chopper circuit providing an output which is alternatively responsive to said minimum and maximum pressures.
Claim 8
Dependent Claim
14 words
A detector as in claim 1 wherein the ratio-determining means includes a variable-gain device.
Claim 9
Dependent Claim
20 words
A detector as in claim 1 wherein the ratio-determining means comprises a pentode having at least a semiremote cutoff characteristic.
Claim 10
Dependent Claim
15 words
A detector as in claim 1 wherein said transducers provide electrical outputs of negative polarity.
Claim 11
Dependent Claim
19 words
A detector as in claim 1 which further includes means responsive to said signal for providing an audible warning.
Claim 12
Dependent Claim
36 words
A detector as in claim 1 wHich further includes a corresponding plurality of comparing devices, means coupling each transducer to its corresponding comparing device, and means coupling the minimum-pressure-determining means to each of the comparing devices.
Claim 13
Dependent Claim
13 words
A detector as in claim 11 wherein the comparing devices comprise differential amplifiers.
Claim 14
Dependent Claim
36 words
A detector as in claim 11 which further includes a corresponding plurality of coincidence circuits, means coupling each comparing device to its corresponding coincidence circuit, and means coupling said signal to each of the coincidence circuits.
Claim 15
Dependent Claim
18 words
A detector as in claim 13 wherein each comparing device is coupled to inhibit its corresponding coincidence circuit.
Claim 16
Dependent Claim
21 words
A detector as in claim 13 which further includes means responsive to each coincidence circuit for providing a corresponding visual warning.
Claim 17
Dependent Claim
51 words
A flameout detector for an aircraft having a plurality of jet engines including in combination a corresponding plurality of turbine-discharge-pressure transducers each providing an output, means for determining the difference between two of said outputs, and means operable in response to a predetermined value of said difference for providing a signal.
Claim 18
Dependent Claim
51 words
A flameout detector for an aircraft having a plurality of jet engines including in combination a corresponding plurality of turbine-discharge-pressure transducers each providing an output, means for determining the difference between two of said outputs, and means operable in response to a predetermined value of said difference for providing a signal.
Claim 19
Dependent Claim
87 words
A detector as in claim 16 for an aircraft having at least three engines wherein said two outputs are respectively proportional to the minimum-turbine-discharge pressure and to the maximum-turbine-discharge pressure. 18 A flameout detector for an aircraft having a plurality of jet engines including in combination a corresponding plurality of turbine-discharge-pressure transducers each providing an output, means for determining the ratio of two of said outputs, and means operable in response to a predetermined difference in the value of said ratio from unity for providing a signal.
Claim 20
Dependent Claim
30 words
A detector as in claim 18 for an aircraft having at least three engines wherein said two outputs are respectively proportional to the minimum-turbine-discharge pressure and to the maximum-turbine-discharge pressure.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-04 | 1975-04-05 | 1975-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-04 | 1979-04-05 | 1979-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-04 | 1983-04-05 | 1983-10-05 | $7700.00 | Window Closed / Lapsed |