US3081457A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Decade method of noise reduction
Assignee: International Standard Electric Corp
•
Filing: 1949-03-03
•
Granted: 1963-03-12
•
Expires: 1969-03-03
Abstract
No abstract record available.
Inventors
- 👤 Toro Michael J Di
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:12
CPC Classifications
G; G01; G01S; G01S3/00; G01S3/02; G01S3/04; G01S3/043; H; H03; H03D; H03D1/00; H03D1/02; H03D1/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
A RADIO DIRECTION FINDER COMPRISING A ROTATING DIRECTIONAL ANTENNA, A RECEIVER CONNECTED TO THE ANTENNA, MECHANISM FOR CONTINUOUSLY ROTATING THE ANTENNA SO THAT A RADIO SIGNAL FROM A GIVEN DIRECTION IS RECEIVED AT LEAST ONCE DURING EACH REVOLUTION OF THE ANTENNA, FIRST CIRCUIT MEANS FOR INTEGRATING IN PHASE DECADES OF THE SIGNALS RECEIVED FROM A GIVEN DIRECTION DURING SUCCESSIVE REVOLUTIONS OF THE ANTENNA FOR DERIVING COMPOSITE SIGNALS EACH PROPORTIONAL TO THE IN PHASE SUM OF A DECADE OF THE RECEIVED SIGNALS, AND SECOND CIRCUIT MEANS FOR INTEGRATING IN PHASE A DECADE OF THE COMPOSITE SIGNALS TO OBTAIN A FINAL SIGNAL, WHEREBY THE BEARING ERROR OF THE FINAL SIGNAL DUE TO NOISE IS REDUCED.
Claim 2
Dependent Claim
113 words
A RADIO DIRECTION FINDER COMPRISING A ROTATING DIRECTIONAL ANTENNA, A RECEIVER CONNECTED TO THE ANTENNA, MECHANISM FOR CONTINUOUSLY ROTATING THE ANTENNA SO THAT A RADIO SIGNAL FROM A GIVEN DIRECTION IS RECEIVED AT LEAST ONCE DURING EACH REVOLUTION OF THE ANTENNA, FIRST CIRCUIT MEANS FOR INTEGRATING IN PHASE DECADES OF THE SIGNALS RECEIVED FROM A GIVEN DIRECTION DURING SUCCESSIVE REVOLUTIONS OF THE ANTENNA FOR DERIVING COMPOSITE SIGNALS EACH PROPORTIONAL TO THE IN PHASE SUM OF A DECADE OF THE RECEIVED SIGNALS, AND SECOND CIRCUIT MEANS FOR INTEGRATING IN PHASE A DECADE OF THE COMPOSITE SIGNALS TO OBTAIN A FINAL SIGNAL, WHEREBY THE BEARING ERROR OF THE FINAL SIGNAL DUE TO NOISE IS REDUCED.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-03-11 | 1966-09-10 | 1967-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-11 | 1970-09-10 | 1971-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-11 | 1974-09-10 | 1975-03-12 | $7700.00 | Window Closed / Lapsed |