US3108224A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radar receivers
Assignee: AC Cossor Ltd
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Filing: 1960-08-29
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Granted: 1963-10-22
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Expires: 1980-08-29
Abstract
No abstract record available.
Inventors
- 👤 Bradsell Peter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:04
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/88; G01S13/95; Y; Y02; Y02A; Y02A90/00; Y02A90/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
A SUPERHETERODYNE RADAR RECEIVER HAVING AN INTERMEDIATE FREQUENCY STAGE COMPRISING TWO SEPARATE AMPLIFYING CHANNELS AND MEANS FOR DETECTING AND COMBINING THE OUTPUTS OF SAID CHANNELS IN OPPOSING RELATION TO PROVIDE A DISPLAY-INTENSITY CONTROL SIGNAL PROPORTIONAL TO THE DIFFERENCE BETWEEN THE TWO CHANNEL OUTPUT, THE TWO CHANNELS HAVING LOGARITHMIC INPUT-OUTPUT CHARACTERISTICS AND HAVING SUBSTANTIALLY THE SAME OUTPUTS AT A PREDETERMINED AMPLITUDE OF INPUT SIGNAL, AND ONE CHANNEL HAVING AN INPUT-OUTPUT CHARACTERISTIC WHICH DEPART SUBSTANTIALLY FROM THAT OF THE OTHER CHANNEL FOR INPUT SIGNAL AMPLITUDES BELOW SAID PREDETERMINED AMPLITUDE VALUE, WHEREBY FOR INCREASING INPUT SIGNAL VALUES BELOW SAID PREDETERMINED VALUE, SAID CONTROL SIGNAL FIRST INCREASES IN VALUE AND THEN DECREASES IN VALUE TO SUBSTANTIALLY ZERO WHEN THE INPUT REACHES SAID PREDETERMINED VALUE.
Claim 2
Dependent Claim
120 words
A SUPERHETERODYNE RADAR RECEIVER HAVING AN INTERMEDIATE FREQUENCY STAGE COMPRISING TWO SEPARATE AMPLIFYING CHANNELS AND MEANS FOR DETECTING AND COMBINING THE OUTPUTS OF SAID CHANNELS IN OPPOSING RELATION TO PROVIDE A DISPLAY-INTENSITY CONTROL SIGNAL PROPORTIONAL TO THE DIFFERENCE BETWEEN THE TWO CHANNEL OUTPUT, THE TWO CHANNELS HAVING LOGARITHMIC INPUT-OUTPUT CHARACTERISTICS AND HAVING SUBSTANTIALLY THE SAME OUTPUTS AT A PREDETERMINED AMPLITUDE OF INPUT SIGNAL, AND ONE CHANNEL HAVING AN INPUT-OUTPUT CHARACTERISTIC WHICH DEPART SUBSTANTIALLY FROM THAT OF THE OTHER CHANNEL FOR INPUT SIGNAL AMPLITUDES BELOW SAID PREDETERMINED AMPLITUDE VALUE, WHEREBY FOR INCREASING INPUT SIGNAL VALUES BELOW SAID PREDETERMINED VALUE, SAID CONTROL SIGNAL FIRST INCREASES IN VALUE AND THEN DECREASES IN VALUE TO SUBSTANTIALLY ZERO WHEN THE INPUT REACHES SAID PREDETERMINED VALUE.
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) | 1966-10-21 | 1967-04-22 | 1967-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-10-21 | 1971-04-22 | 1971-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-10-21 | 1975-04-22 | 1975-10-22 | $7700.00 | Window Closed / Lapsed |