US3276255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for development of complemented vertical speed in aircraft
Assignee: Collins Radio Co
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Filing: 1964-01-23
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Granted: 1966-10-04
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Expires: 1984-01-23
Abstract
No abstract record available.
Inventors
- 👤 Edwin R Hattendorf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:38
CPC Classifications
G; G05; G05D; G05D1/00; G05D1/04; G05D1/06; G05D1/0607; G05D1/0653; G05D1/0676
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
IN AN AIRCRAFT CONTROL SYSTEM, MEANS FOR DEVELOPING AN ALTITUDE RATE SIGNAL OF IMPROVED FREQUENCY SPECTRUM COMPRISING A FIRST SENSOR DEVELOPING A SIGNAL PROPORTIONAL TO THE RATE OF CHANGE OF ALTITUDE OF SAID AIRCRAFT, LOW PASS FILTERING MEANS RECEIVING SAID ALTITUDE SIGNAL AND SUPPLYING A FIRST INPUT TO A SIGNAL MIXING MEANS, MEANS DEVELOPING A SIGNAL PROPORTIONAL TO AIRCRAFT VERTICAL ACCELERATION, BANDPASS FILTERING MEANS RECEIVING SAID VERTICAL ACCELERATION SIGNAL AND SUPPLYING A SECOND INPUT TO SAID SIGNAL MIXING MEANS, SAID LOW PASS FILTERING MEANS COMPRISES A SECOND ORDER LOW PASS FILTER HAVING A TRANSFER CHARACTERISTIC EXPRESSED IN LAPLACIAN FORM AS
Claim 2
Dependent Claim
100 words
IN AN AIRCRAFT CONTROL SYSTEM, MEANS FOR DEVELOPING AN ALTITUDE RATE SIGNAL OF IMPROVED FREQUENCY SPECTRUM COMPRISING A FIRST SENSOR DEVELOPING A SIGNAL PROPORTIONAL TO THE RATE OF CHANGE OF ALTITUDE OF SAID AIRCRAFT, LOW PASS FILTERING MEANS RECEIVING SAID ALTITUDE SIGNAL AND SUPPLYING A FIRST INPUT TO A SIGNAL MIXING MEANS, MEANS DEVELOPING A SIGNAL PROPORTIONAL TO AIRCRAFT VERTICAL ACCELERATION, BANDPASS FILTERING MEANS RECEIVING SAID VERTICAL ACCELERATION SIGNAL AND SUPPLYING A SECOND INPUT TO SAID SIGNAL MIXING MEANS, SAID LOW PASS FILTERING MEANS COMPRISES A SECOND ORDER LOW PASS FILTER HAVING A TRANSFER CHARACTERISTIC EXPRESSED IN LAPLACIAN FORM AS
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) | 1969-10-03 | 1970-04-04 | 1970-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-03 | 1974-04-04 | 1974-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-03 | 1978-04-04 | 1978-10-04 | $7700.00 | Window Closed / Lapsed |