US3373675A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic schedule generator tracking circuit and rate limiter
Assignee: RTX Corp
•
Filing: 1966-07-11
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Granted: 1968-03-19
•
Expires: 1986-07-11
Abstract
No abstract record available.
Inventors
- 👤 Stanley G Best
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:00
CPC Classifications
G; G05; G05D; G05D16/00; G05D16/20; G05D16/2006; G05D16/2013; G05D16/202; B; B64; B64D; B64D13/00; B64D13/02; B64D13/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
IN A PRESSURE REGULATOR FOR AN AIRCRAFT CABIN WHEREIN THE FLOW OF AIR THROUGH AN OUTFLOW VALVE IS MODULATED TO PRESSURIZE THE CABIN THROUGHOUT THE ASCENT, CRUISE, AND DESCENT FLIGHT PHASES OF THE AIRCRAFT AND WHEREIN THE CABIN PRESSURE REGULATOR MODULATES THE OUTFLOW VALVE BY COMPARING A DESIRED CABIN PRESSURE VOLTAGE WITH A VOLTAGE INDICATIVE OF THE ACTUAL CABIN PRESSURE TO PROVIDE AN ERROR VOLTAGE FOR MODULATING THE OUTFLOW VALVE IN A DIRECTION TO MATCH THE ACTUAL CABIN PRESSURE VOLTAGE TO THE DESIRED CABIN PRESSURE VOLTAGE, THE IMPROVEMENT COMPRISING: A DEADBAND CIRCUIT COUPLED TO THE ERROR VOLTAGE AND PRODUCING A TRACKING VOLTAGE WHEN THE ERROR VOLTAGE EXCEEDS A PREDETERMINED ABSOLUTE MAGNITUDE, AND A FEEDBACK CIRCUIT RESPONSIVE TO THE DESIRED CABIN PRESSURE VOLTAGE AND THE TRACKING VOLTAGE FOR MODIFYING THE DESIRED CABIN PRESSURE VOLTAGE IN A DIRECTION TO MATCH THE ACTUAL CABIN PRESSURE VOLTAGE.
Claim 2
Dependent Claim
143 words
IN A PRESSURE REGULATOR FOR AN AIRCRAFT CABIN WHEREIN THE FLOW OF AIR THROUGH AN OUTFLOW VALVE IS MODULATED TO PRESSURIZE THE CABIN THROUGHOUT THE ASCENT, CRUISE, AND DESCENT FLIGHT PHASES OF THE AIRCRAFT AND WHEREIN THE CABIN PRESSURE REGULATOR MODULATES THE OUTFLOW VALVE BY COMPARING A DESIRED CABIN PRESSURE VOLTAGE WITH A VOLTAGE INDICATIVE OF THE ACTUAL CABIN PRESSURE TO PROVIDE AN ERROR VOLTAGE FOR MODULATING THE OUTFLOW VALVE IN A DIRECTION TO MATCH THE ACTUAL CABIN PRESSURE VOLTAGE TO THE DESIRED CABIN PRESSURE VOLTAGE, THE IMPROVEMENT COMPRISING: A DEADBAND CIRCUIT COUPLED TO THE ERROR VOLTAGE AND PRODUCING A TRACKING VOLTAGE WHEN THE ERROR VOLTAGE EXCEEDS A PREDETERMINED ABSOLUTE MAGNITUDE, AND A FEEDBACK CIRCUIT RESPONSIVE TO THE DESIRED CABIN PRESSURE VOLTAGE AND THE TRACKING VOLTAGE FOR MODIFYING THE DESIRED CABIN PRESSURE VOLTAGE IN A DIRECTION TO MATCH THE ACTUAL CABIN PRESSURE VOLTAGE.
References Cited (Backward Citations)
US2973702A
Cited
US3152534A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-03-19 | 1971-09-18 | 1972-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-19 | 1975-09-18 | 1976-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-19 | 1979-09-18 | 1980-03-19 | $7700.00 | Window Closed / Lapsed |