US3242489A
Expired / Lapsed
US
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Radar tracking apparatus
Assignee: Honeywell Inc
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Filing: 1964-03-04
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Granted: 1966-03-22
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Expires: 1984-03-04
Abstract
No abstract record available.
Inventors
- 👤 Warren L Leyde
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:26
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/40; G01S7/4004; G01S7/4021; G01S13/00; G01S13/66; G01S13/70; G01S7/4052; G01S7/406; G01S7/4073
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
97 words
IN A SYSTEM HAVING A SWEEP CIRCUIT FOR TIMING THE SYSTEM AND WHEREIN ANY DRIFT OF THE SWEEP CIRCUIT WILL PRODUCE SYSTEM ERRORS, THE IMPROVEMENT COMPRISING: MEANS FOR INTRODUCING A DUMMY SIGNAL INTO THE SYSTEM; MEANS FOR COMPARING THE OUTPUT OF SAID SWEEP CIRCUIT WITH A FIXED REFERENCE TO PRODUCE A GATE SIGNAL; MEANS FOR GATING THE GATE SIGNAL AND THE DUMMY SIGNAL TO PRODUCE AN ERROR SIGNAL PROPORTIONAL TO THE DISPLACEMENT OF THE SWEEP SIGNAL FROM A PREDETERMINED REFERENCE LEVEL; AND, MEANS RESPONSIVE TO SAID ERROR SIGNAL FOR ADJUSTING SAID SWEEP CIRCUIT TO MINIMIZE DRIFT ERRORS.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-21 | 1969-09-20 | 1970-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-21 | 1973-09-20 | 1974-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-21 | 1977-09-20 | 1978-03-22 | $7700.00 | Window Closed / Lapsed |