Patent US3140436A successfully refreshed from Google Patents.
US3140436A
Expired / Lapsed
US
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Control system for automatic pilot
Assignee: GKN Aerospace Transparency Systems Inc
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Filing: 1961-11-20
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Granted: 1964-07-07
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Expires: 1981-11-20
Abstract
No abstract record available.
Inventors
- 👤 William B Hatch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:58
CPC Classifications
G; G05; G05D; G05D1/00; G05D1/02; G05D1/0206
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
AN AUTOPILOT SYSTEM FOR A BOAT, COMPRISING IN COMBINATION MEANS FOR DEVELOPING A FIRST SIGNAL THAT REPRSENTS THE HEADING ERROR. MEANS FOR DEVELOPING A SECOND SIGNAL THAT REPRESENTS THE RUDDER DEFLECTION, MEANS FOR DRIVING FROM THE SECOND SIGNAL A THIRD SIGNAL THAT REPRESENTS THE RATE OF TURN OF THE BOAT, MEANS FOR SUMMING THE SIGNALS WITH SUCH POLARITY THAT THE SECOND AND THIRD SIGNALS OPPOSE THE FIRST SIGNAL WHEN THE RUDDER DEFLECTION AND THE RATE OF TURN ARE IN A DIRECTION TO CORRECT THE HEADING ERROR, AND MEANS FOR DRIVING THE RUDDER IN RESPONSE TO VARIATIONS OF THE SIGNAL SUM.
Claim 2
Dependent Claim
100 words
AN AUTOPILOT SYSTEM FOR A BOAT, COMPRISING IN COMBINATION MEANS FOR DEVELOPING A FIRST SIGNAL THAT REPRSENTS THE HEADING ERROR. MEANS FOR DEVELOPING A SECOND SIGNAL THAT REPRESENTS THE RUDDER DEFLECTION, MEANS FOR DRIVING FROM THE SECOND SIGNAL A THIRD SIGNAL THAT REPRESENTS THE RATE OF TURN OF THE BOAT, MEANS FOR SUMMING THE SIGNALS WITH SUCH POLARITY THAT THE SECOND AND THIRD SIGNALS OPPOSE THE FIRST SIGNAL WHEN THE RUDDER DEFLECTION AND THE RATE OF TURN ARE IN A DIRECTION TO CORRECT THE HEADING ERROR, AND MEANS FOR DRIVING THE RUDDER IN RESPONSE TO VARIATIONS OF THE SIGNAL SUM.
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) | 1967-07-07 | 1968-01-06 | 1968-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-07 | 1972-01-06 | 1972-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-07 | 1976-01-06 | 1976-07-07 | $7700.00 | Window Closed / Lapsed |