US3134100A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Doppler difference collision warning system
Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1959-07-29
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Granted: 1964-05-19
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Expires: 1979-07-29
Abstract
No abstract record available.
Inventors
- 👤 Lakatos Emory
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:39
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/88; G01S13/93; G01S13/933
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
81 words
A RADIO DOPPLER DIFFERENCE VEHICLE EVASIVE ACTION INDICATING SYSTEM COMPRISING, AT LEAST A PAIR OF SPACED APART SENSING MEANS RESPONSIVE TO INCOMING SIGNALS, FIRST MEANS FOR PROCESSING INCOMING SIGNALS FROM A RELATIVELY MOVING OBJECT RECEIVED BY EACH OF SAID SPACED APART SENSING MEANS TO OBTAIN DOPPLER FREQUENCY SHIFT SIGNALS, MEANS FOR COMPARING SAID DOPPLER FREQUENCY SHIFT SIGNALS FOR OBTAINING A RESULTANT DIFFERENCE SIGNAL, AND THRESHOLD MEANS FOR PROVIDING OUTPUT SIGNALS IN RESPONSE TO AT LEAST ONE CHARACTERISTIC OF SAID DIFFERENCE SIGNAL.
Claim 2
Dependent Claim
81 words
A RADIO DOPPLER DIFFERENCE VEHICLE EVASIVE ACTION INDICATING SYSTEM COMPRISING, AT LEAST A PAIR OF SPACED APART SENSING MEANS RESPONSIVE TO INCOMING SIGNALS, FIRST MEANS FOR PROCESSING INCOMING SIGNALS FROM A RELATIVELY MOVING OBJECT RECEIVED BY EACH OF SAID SPACED APART SENSING MEANS TO OBTAIN DOPPLER FREQUENCY SHIFT SIGNALS, MEANS FOR COMPARING SAID DOPPLER FREQUENCY SHIFT SIGNALS FOR OBTAINING A RESULTANT DIFFERENCE SIGNAL, AND THRESHOLD MEANS FOR PROVIDING OUTPUT SIGNALS IN RESPONSE TO AT LEAST ONE CHARACTERISTIC OF SAID DIFFERENCE SIGNAL.
Claim 3
Dependent Claim
127 words
A RADIO DOPPLER DIFFERENCE VEHICLE EVASIVE ACTION INDICATING SYSTEM COMPRISING, SPACED APART SENSING MEANS RESPONSIVE TO INCOMING SIGNALS OVER A 360* AZIMUTH, FIRST MEANS FOR SEPARATELY PROCESSING INCOMING SIGNALS FROM A SINGLE RELATIVELY MOVING OBJECT RECEIVED BY SAID SPACED APART SENSING MEANS TO OBTAIN DOPPLER FREQUENCY SHIFT SIGNALS, MEANS FOR COMBINING SAID DOPPLER FREQUENCY SHIFT SIGNALS FOR OBTAINING A DIFFERENCE SIGNAL, THRESHOLD MEANS FOR PROVIDING OUTPUT SIGNALS IN RESPONSE TO THE POLARITY AND MAGNITUDE OF SAID DIFFERENCE SIGNAL, AND INDICATOR MEANS CONNECTED TO SAID THRESHOLD MEANS AND RESPONSIVE TO SAID OUTPUT SIGNALS FOR PROVIDING AN EVASIVE ACTION INDICATION, AND TRANSMITTER MEANS CAPABLE OF EMITTING PULSE RADIO SIGNALS IN ALL DIRECTIONS FROM THE CARRYING VEHICLE FOR PROVIDING SAID INCOMING SIGNALS FROM TRANSMITTED PULSES RETURNING FROM RELATIVELY MOVING VEHICLES.
Claim 4
Dependent Claim
127 words
A RADIO DOPPLER DIFFERENCE VEHICLE EVASIVE ACTION INDICATING SYSTEM COMPRISING, SPACED APART SENSING MEANS RESPONSIVE TO INCOMING SIGNALS OVER A 360* AZIMUTH, FIRST MEANS FOR SEPARATELY PROCESSING INCOMING SIGNALS FROM A SINGLE RELATIVELY MOVING OBJECT RECEIVED BY SAID SPACED APART SENSING MEANS TO OBTAIN DOPPLER FREQUENCY SHIFT SIGNALS, MEANS FOR COMBINING SAID DOPPLER FREQUENCY SHIFT SIGNALS FOR OBTAINING A DIFFERENCE SIGNAL, THRESHOLD MEANS FOR PROVIDING OUTPUT SIGNALS IN RESPONSE TO THE POLARITY AND MAGNITUDE OF SAID DIFFERENCE SIGNAL, AND INDICATOR MEANS CONNECTED TO SAID THRESHOLD MEANS AND RESPONSIVE TO SAID OUTPUT SIGNALS FOR PROVIDING AN EVASIVE ACTION INDICATION, AND TRANSMITTER MEANS CAPABLE OF EMITTING PULSE RADIO SIGNALS IN ALL DIRECTIONS FROM THE CARRYING VEHICLE FOR PROVIDING SAID INCOMING SIGNALS FROM TRANSMITTED PULSES RETURNING FROM RELATIVELY MOVING VEHICLES.
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) | 1967-05-19 | 1967-11-18 | 1968-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-19 | 1971-11-18 | 1972-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-19 | 1975-11-18 | 1976-05-19 | $7700.00 | Window Closed / Lapsed |