Patent US3128462A successfully refreshed from Google Patents.
US3128462A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Test arrangement
Assignee: Textron Systems Corp
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Filing: 1959-07-02
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Granted: 1964-04-07
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Expires: 1979-07-02
Abstract
No abstract record available.
Inventors
- 👤 Martin G Woolfson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:33
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/40; G01S7/4004; G01S7/4021
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
258 words
A RADAR TEST SET COMPRISING MEANS TO RECEIVE AN INITIAL RADAR RF PULSE, MEANS INCLUDING A TUNABLE LOCAL OSCILLATOR FOR CONVERTING SAID RADAR RF PULSE TO A RADAR IF PULSE, MEANS TO CONVERT SAID RADAR IF PULSE TO A VIDEO PULSE DELAYED IN TIME WITH RESPECT TO SAID INITIAL RADAR RF PULSE, A DISCRIMINATOR HAVING A TANK CIRCUIT TUNED TO A GIVEN FREQUENCY AND RESPONSIVE TO SAID RADAR IF PULSE FOR PRODUCING AN ERROR SIGNAL HAVING A POLARITY AND MAGNITUDE PROPORTIONAL TO THE DEVIATION OF THE FREQUENCY OF SAID RADAR IF PULSE FROM SAID GIVEN FREQUENCY, CONTROL MEANS RESPONSIVE TO SAID ERROR SIGNAL FOR TUNING SAID LOCAL OSCILLATOR TO A FREQUENCY REMOVED FROM THAT OF SAID RADAR RF PULSE BY AN AMOUNT EQUAL TO SAID GIVEN FREQUENCY, AND AN IF OSCILLATOR INCLUDING A TANK CIRCUIT TUNED TO SAID GIVEN FREQUENCY AND RESPONSIVE TO THE DELAYED VIDEO PULSE FOR PRODUCING AN IF ECHO PULSE DELAYED IN TIME WITH RESPECT TO SAID IF RADAR PULSE AND AT SUBSTANTIALLY THE SAME FREQUENCY, MEANS FOR MAINTAINING THE MAGNITUDE AND PHASE OF THE VOLTAGES IN THE TANK CIRCUIT OF THE DISCRIMINATOR EQUAL TO THE MAGNITUDE AND PHASE OF THE VOLTAGES IN THE TANK CIRCUIT OF THE IF OSCILLATOR SO THAT THE RESONANT FREQUENCY OF THE DISCRIMINATOR TANK CIRCUIT IS THE SAME AS THE RESONANT FREQUENCY OF THE OSCILLATOR TANK CIRCUIT, AND MEANS INCLUDING SAID LOCAL OSCILLATOR FOR CONVERTING SAID IF ECHO PULSE TO AN RF ECHO PULSE DELAYED IN TIME WITH RESPECT TO SAID RF RADAR PULSE AND AT SUBSTANTIALLY THE SAME FREQUENCY.
Claim 2
Dependent Claim
258 words
A RADAR TEST SET COMPRISING MEANS TO RECEIVE AN INITIAL RADAR RF PULSE, MEANS INCLUDING A TUNABLE LOCAL OSCILLATOR FOR CONVERTING SAID RADAR RF PULSE TO A RADAR IF PULSE, MEANS TO CONVERT SAID RADAR IF PULSE TO A VIDEO PULSE DELAYED IN TIME WITH RESPECT TO SAID INITIAL RADAR RF PULSE, A DISCRIMINATOR HAVING A TANK CIRCUIT TUNED TO A GIVEN FREQUENCY AND RESPONSIVE TO SAID RADAR IF PULSE FOR PRODUCING AN ERROR SIGNAL HAVING A POLARITY AND MAGNITUDE PROPORTIONAL TO THE DEVIATION OF THE FREQUENCY OF SAID RADAR IF PULSE FROM SAID GIVEN FREQUENCY, CONTROL MEANS RESPONSIVE TO SAID ERROR SIGNAL FOR TUNING SAID LOCAL OSCILLATOR TO A FREQUENCY REMOVED FROM THAT OF SAID RADAR RF PULSE BY AN AMOUNT EQUAL TO SAID GIVEN FREQUENCY, AND AN IF OSCILLATOR INCLUDING A TANK CIRCUIT TUNED TO SAID GIVEN FREQUENCY AND RESPONSIVE TO THE DELAYED VIDEO PULSE FOR PRODUCING AN IF ECHO PULSE DELAYED IN TIME WITH RESPECT TO SAID IF RADAR PULSE AND AT SUBSTANTIALLY THE SAME FREQUENCY, MEANS FOR MAINTAINING THE MAGNITUDE AND PHASE OF THE VOLTAGES IN THE TANK CIRCUIT OF THE DISCRIMINATOR EQUAL TO THE MAGNITUDE AND PHASE OF THE VOLTAGES IN THE TANK CIRCUIT OF THE IF OSCILLATOR SO THAT THE RESONANT FREQUENCY OF THE DISCRIMINATOR TANK CIRCUIT IS THE SAME AS THE RESONANT FREQUENCY OF THE OSCILLATOR TANK CIRCUIT, AND MEANS INCLUDING SAID LOCAL OSCILLATOR FOR CONVERTING SAID IF ECHO PULSE TO AN RF ECHO PULSE DELAYED IN TIME WITH RESPECT TO SAID RF RADAR PULSE AND AT SUBSTANTIALLY THE SAME FREQUENCY.
Claim 3
Dependent Claim
130 words
IN COMBINATION, MEANS INCLUDING A LOCAL OSCILLATOR FOR CONVERTING HIGH FREQUENCY INPUT PULSES TO LOWER FREQUENCY PULSES, AN AFC CIRCUIT FOR STABILIZING SAID LOCAL OSCILLATOR INCLUDING A DISCRIMINATOR HAVING A CIRCUIT WHICH IS RESONANT AT A FREQUENCY SUBSTANTIALLY THE SAME AS SAID LOWER FREQUENCY PULSES, DETECTOR MEANS FOR CONVERTING SAID LOWER FREQUENCY PULSES TO VIDEO PULSES, MEANS FOR DELAYING SAID VIDEO PULSES WITH RESPECT TO SAID INPUT PULSES, AN OSCILLATOR HAVING A RESONANT CIRCUIT WHICH INCLUDES THE RESONANT CIRCUIT OF SAID DISCRIMINATOR, SAID OSCILLATOR BEING RESPONSIVE TO SAID DELAYED VIDEO PULSES FOR PRODUCING DELAYED PULSES AT SUBSTANTIALLY THE SAME FREQUENCY AS SAID LOWER FREQUENCY PULSES, AND MEANS INCLUDING SAID LOCAL OSCILLATOR FOR CONVERTING THE DELAYED LOWER FREQUENCY PULSES TO DELAYED OUTPUT PULSES AT THE SAME FREQUENCY AS THE INPUT PULSES.
Claim 4
Dependent Claim
130 words
IN COMBINATION, MEANS INCLUDING A LOCAL OSCILLATOR FOR CONVERTING HIGH FREQUENCY INPUT PULSES TO LOWER FREQUENCY PULSES, AN AFC CIRCUIT FOR STABILIZING SAID LOCAL OSCILLATOR INCLUDING A DISCRIMINATOR HAVING A CIRCUIT WHICH IS RESONANT AT A FREQUENCY SUBSTANTIALLY THE SAME AS SAID LOWER FREQUENCY PULSES, DETECTOR MEANS FOR CONVERTING SAID LOWER FREQUENCY PULSES TO VIDEO PULSES, MEANS FOR DELAYING SAID VIDEO PULSES WITH RESPECT TO SAID INPUT PULSES, AN OSCILLATOR HAVING A RESONANT CIRCUIT WHICH INCLUDES THE RESONANT CIRCUIT OF SAID DISCRIMINATOR, SAID OSCILLATOR BEING RESPONSIVE TO SAID DELAYED VIDEO PULSES FOR PRODUCING DELAYED PULSES AT SUBSTANTIALLY THE SAME FREQUENCY AS SAID LOWER FREQUENCY PULSES, AND MEANS INCLUDING SAID LOCAL OSCILLATOR FOR CONVERTING THE DELAYED LOWER FREQUENCY PULSES TO DELAYED OUTPUT PULSES AT THE SAME FREQUENCY AS THE INPUT PULSES.
References Cited (Backward Citations)
US2421016A
Cited
US2531301A
Cited
US2609510A
Cited
US2897352A
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US3064219A
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US2857593A
Cited
FR1168131A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-04-07 | 1967-10-07 | 1968-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-07 | 1971-10-07 | 1972-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-07 | 1975-10-07 | 1976-04-07 | $7700.00 | Window Closed / Lapsed |