US3309923A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aircraft instruments
Assignee: S Smith and Sons Ltd
•
Filing: 1963-11-18
•
Granted: 1967-03-21
•
Expires: 1983-11-18
Abstract
No abstract record available.
Inventors
- 👤 Bishop Roger Ivan
- 👤 Kendall Eric Raymond
- 👤 Palmer Daphne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:42
CPC Classifications
G; G05; G05D; G05D1/00; G05D1/04; G05D1/06; G05D1/0607; G05D1/0653; G05D1/0661
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
APPARATUS FOR GENERATING A SIGNAL WHICH IS CONTINUOUSLY REPRESENTATIVE OF THE DEVIATION IN ACTUAL RATE OF CHANGE OF PITCH ATTITUDE OF AN AIRCRAFT FROM A PRESCRIBED RATE OF CHANGE OF PITCH ATTITUDE WHICH IS DEFINED AT EACH INSTANT FOR SAID AIRCRAFT AT LEAST THROUGHOUT THAT PORTION OF ITS CLIMB PHASE WHEN ITS FORWARDLY ACCELERATION IS VARYING COMPRISING, MEANS FOR GENERATING A FIRST SIGNAL WHICH IS REPRESENTATIVE OF THE FORWARD ACCELERATION OF THE AIRCRAFT, MEANS FOR GENERATING A SECOND SIGNAL WHICH IS REPRESENTATIVE OF THE RATE OF CHANGE OF PITCH ATTITUDE OF THE AIRCRAFT, MEANS HAVING SAID FIRST AND SECOND SIGNALS APPLIED THERETO AND DERIVING A THIRD SIGNAL REPRESENTATIVE OF THE DIFFERENCE IN MAGNITUDE AND SIGN
Claim 2
Dependent Claim
115 words
APPARATUS FOR GENERATING A SIGNAL WHICH IS CONTINUOUSLY REPRESENTATIVE OF THE DEVIATION IN ACTUAL RATE OF CHANGE OF PITCH ATTITUDE OF AN AIRCRAFT FROM A PRESCRIBED RATE OF CHANGE OF PITCH ATTITUDE WHICH IS DEFINED AT EACH INSTANT FOR SAID AIRCRAFT AT LEAST THROUGHOUT THAT PORTION OF ITS CLIMB PHASE WHEN ITS FORWARDLY ACCELERATION IS VARYING COMPRISING, MEANS FOR GENERATING A FIRST SIGNAL WHICH IS REPRESENTATIVE OF THE FORWARD ACCELERATION OF THE AIRCRAFT, MEANS FOR GENERATING A SECOND SIGNAL WHICH IS REPRESENTATIVE OF THE RATE OF CHANGE OF PITCH ATTITUDE OF THE AIRCRAFT, MEANS HAVING SAID FIRST AND SECOND SIGNALS APPLIED THERETO AND DERIVING A THIRD SIGNAL REPRESENTATIVE OF THE DIFFERENCE IN MAGNITUDE AND SIGN
References Cited (Backward Citations)
US3200642A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-20 | 1970-09-19 | 1971-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-20 | 1974-09-19 | 1975-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-20 | 1978-09-19 | 1979-03-21 | $7700.00 | Window Closed / Lapsed |