US3371199A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polar coordinate converter
Assignee: Leeds and Northrup Co
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Filing: 1963-11-07
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Granted: 1968-02-27
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Expires: 1983-11-07
Abstract
No abstract record available.
Inventors
- 👤 John W Schwartzenberg
- 👤 Duncan K Foley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:05
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/12; G06G7/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
165 words
AN INVERSE RESOLVER FOR CONVERTING A PAIR OF INPUTS REPRESENTATIVE OF TWO RECTANGULAR COORDINATE COMPONENTS OF A RADIUS VECTOR INTO AN OUTPUT SIGNAL REPRESENTATIVE OF THE MAGNITUDE OF SAID RADIUS VECTOR COMPRISING MEANS FOR PRODUCING TWO TIME VARYING OUTPUT SIGNALS RESPECTIVELY REPRESENTATIVE OF THE VARYING RECTANGULAR COMPONENTS OF A ROTATING VECTOR SIGNAL OF CONSTANT AMPLITUDE, MEANS FOR PRESETTING SAID FIRST-NAMED MEANS TO INITIAL CONDITIONS REPRESENTATIVE OF POSITIVE OR NEGATIVE VALUES OF THE TWO COORDINATE COMPONENTS OF A RADIUS VECTOR OF UNKNOWN MAGNITUDE, MEANS FOR ENERGIZING SAID FIRST-NAMED MEANS FOR PRODUCING SAID TIME-VARYING OUTPUT SIGNALS AFTER PRESETTING MEANS HAS BEEN PRESET, MEANS RESPONSIVE TO ONE OF SAID OUTPUT SIGNALS FOR DEENERGIZING SAID FIRST-NAMED MEANS WHEN SAID ONE OF SAID OUTPUT SIGNALS IS ZERO AND WHEN THE RATE OF CHANGE OF SAID ONE OF SAID OUTPUTS IS LESS THAN ZERO, AND MEAND RESPONSIVE TO THE OTHER OF SAID OUTPUT SIGNALS TO PROVIDE A SIGNAL REPRESENTATIVE OF THE MAGNITUDE OF THE RADIUS VECTOR REPRESENTED BY SAID INITIAL CONDITIONS.
Claim 2
Dependent Claim
165 words
AN INVERSE RESOLVER FOR CONVERTING A PAIR OF INPUTS REPRESENTATIVE OF TWO RECTANGULAR COORDINATE COMPONENTS OF A RADIUS VECTOR INTO AN OUTPUT SIGNAL REPRESENTATIVE OF THE MAGNITUDE OF SAID RADIUS VECTOR COMPRISING MEANS FOR PRODUCING TWO TIME VARYING OUTPUT SIGNALS RESPECTIVELY REPRESENTATIVE OF THE VARYING RECTANGULAR COMPONENTS OF A ROTATING VECTOR SIGNAL OF CONSTANT AMPLITUDE, MEANS FOR PRESETTING SAID FIRST-NAMED MEANS TO INITIAL CONDITIONS REPRESENTATIVE OF POSITIVE OR NEGATIVE VALUES OF THE TWO COORDINATE COMPONENTS OF A RADIUS VECTOR OF UNKNOWN MAGNITUDE, MEANS FOR ENERGIZING SAID FIRST-NAMED MEANS FOR PRODUCING SAID TIME-VARYING OUTPUT SIGNALS AFTER PRESETTING MEANS HAS BEEN PRESET, MEANS RESPONSIVE TO ONE OF SAID OUTPUT SIGNALS FOR DEENERGIZING SAID FIRST-NAMED MEANS WHEN SAID ONE OF SAID OUTPUT SIGNALS IS ZERO AND WHEN THE RATE OF CHANGE OF SAID ONE OF SAID OUTPUTS IS LESS THAN ZERO, AND MEAND RESPONSIVE TO THE OTHER OF SAID OUTPUT SIGNALS TO PROVIDE A SIGNAL REPRESENTATIVE OF THE MAGNITUDE OF THE RADIUS VECTOR REPRESENTED BY SAID INITIAL CONDITIONS.
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) | 1971-02-26 | 1971-08-28 | 1972-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-26 | 1975-08-28 | 1976-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-26 | 1979-08-28 | 1980-02-27 | $7700.00 | Window Closed / Lapsed |