Patent US3206975A successfully refreshed from Google Patents.
US3206975A
Expired / Lapsed
US
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Rate of altitude change sensor and rate of climb indicator control system
Assignee: Bendix Corp
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Filing: 1962-09-05
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Granted: 1965-09-21
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Expires: 1982-09-05
Abstract
No abstract record available.
Inventors
- 👤 Jr Henry G Elwell
- 👤 Edward J Hazen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:58
CPC Classifications
G; G01; G01P; G01P3/00; G01P3/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
188 words
A RATE OF ALTITUDE CHANGE INDICATOR SYSTEM COMPRISING A FIRST VARIABLE SPEED ELECTRIC MOTOR, A SECOND VARIABLE SPEED ELECTRIC MOTOR, MEANS SENSING AN ALTITUDE CHANGE FOR CONTROLLING THE FIRST VARIABLE SPEED ELECTRIC MOTOR, RATE GENERATOR MEANS DRIVEN BY SAID FIRST MOTOR AT A RATE WHICH VARIES DIRECTLY WITH A VARIATION IN RATE OF ALTITUDE CHANGE, MEANS CONNECTING SAID RATE GENERATOR MEANS IN A RATE DAMPING FEEDBACK CONNECTION TO THE INPUT OF SAID FIRST MOTOR AND TO THE INPUT OF SAID SECOND VARIABLE SPEED MOTOR TO DRIVE SAID SECOND MOTOR TO A POSITION DEPENDING UPON THE RATE OF ALTITUDE CHANGE, A SYNCHRO TRANSFORMER MEANS INCLUDING A ROTOR MEANS, MEANS CONNECTING SAID SECOND VARIABLE SPEED MOTOR IN DRIVEN RELATION TO THE ROTOR MEANS OF SAID SYNCHRO TRANSFORMER MEANS TO POSITION SAID ROTOR MEANS IN ACCORDANCE WITH THE POSITION OF SAID SECOND ROTOR AND TO INDUCE IN SAID SYNCHRO TRANSFORMER MEANS A VOLTAGE SIGNAL WHICH VARIES DIRECTLY WITH THE RATE OF ALTITUDE CHANGE AND WHICH IS IN-PHASE OPPOSITION WITH THE INPUT VOLTAGE TO SAID SECOND MOTOR, MEANS CONNECTING SAID SYNCHRO TRANSFORMER MEANS TO THE INPUT OF SAID SECOND MOTOR TO PRO-
Claim 2
Dependent Claim
188 words
A RATE OF ALTITUDE CHANGE INDICATOR SYSTEM COMPRISING A FIRST VARIABLE SPEED ELECTRIC MOTOR, A SECOND VARIABLE SPEED ELECTRIC MOTOR, MEANS SENSING AN ALTITUDE CHANGE FOR CONTROLLING THE FIRST VARIABLE SPEED ELECTRIC MOTOR, RATE GENERATOR MEANS DRIVEN BY SAID FIRST MOTOR AT A RATE WHICH VARIES DIRECTLY WITH A VARIATION IN RATE OF ALTITUDE CHANGE, MEANS CONNECTING SAID RATE GENERATOR MEANS IN A RATE DAMPING FEEDBACK CONNECTION TO THE INPUT OF SAID FIRST MOTOR AND TO THE INPUT OF SAID SECOND VARIABLE SPEED MOTOR TO DRIVE SAID SECOND MOTOR TO A POSITION DEPENDING UPON THE RATE OF ALTITUDE CHANGE, A SYNCHRO TRANSFORMER MEANS INCLUDING A ROTOR MEANS, MEANS CONNECTING SAID SECOND VARIABLE SPEED MOTOR IN DRIVEN RELATION TO THE ROTOR MEANS OF SAID SYNCHRO TRANSFORMER MEANS TO POSITION SAID ROTOR MEANS IN ACCORDANCE WITH THE POSITION OF SAID SECOND ROTOR AND TO INDUCE IN SAID SYNCHRO TRANSFORMER MEANS A VOLTAGE SIGNAL WHICH VARIES DIRECTLY WITH THE RATE OF ALTITUDE CHANGE AND WHICH IS IN-PHASE OPPOSITION WITH THE INPUT VOLTAGE TO SAID SECOND MOTOR, MEANS CONNECTING SAID SYNCHRO TRANSFORMER MEANS TO THE INPUT OF SAID SECOND MOTOR TO PRO-
References Cited (Backward Citations)
US2698407A
Cited
US2648041A
Cited
US2830243A
Cited
US2726544A
Cited
US2934267A
Cited
US3023616A
Cited
US2985012A
Cited
US3028534A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-20 | 1969-03-22 | 1969-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-20 | 1973-03-22 | 1973-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-20 | 1977-03-22 | 1977-09-21 | $7700.00 | Window Closed / Lapsed |