US3143736A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vehicle detection apparatus
Assignee: Laboratory For Electronics Inc
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Filing: 1961-02-16
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Granted: 1964-08-04
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Expires: 1981-02-16
Abstract
No abstract record available.
Inventors
- 👤 Bernard J Midlock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:15
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/50; G01S13/52; G01S13/522; G01S13/524; G01S13/526; G01S13/528
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
161 words
IN A DETECTION APPARATUS HAVING A HIGH FREQUENCY TRANSMITING AND RECEIVING ANTENNA AND AN ASSOCIATED OSCILLATOR-DETECTOR CIRCUIT FOR TRANSMITTING HIGH FREQUENCY RADIO SIGNALS IN A CONFINED BEAM AND FOR RECEIVING A DOPPLER MODIFIED SIGNAL REFLECTED FROM A MOVING BODY PASSING THROUGH SAID BEAM AND MIXING SAID TRANSMITTED AND SAID RECEIVED SIGNALS IN SAID OSCILLATOR-DETECTOR TO PROVIDE A LOW FREQUENCY DOPPLER BEAT FREQUENCICY AND A LOW FREQUENCY SIGNAL OUTPUT CORRESPONDING TO SAID DOPPLER BEAT FREQUENCY; AN AUXILIARY ANTENNA ADJACENT THE FIRST MENTIONED ANTENNA FOR PROVIDING REFLECTION OF PART OF SAID HIGH FREQUENCY RADIO SIGNALS TO SAID FIRST MENTIONED ANTENNA, AND MEANS FOR APPLYING A LOW FREQUENCY SIGNAL TO SAID AUXILIARY ANTENNA FOR VARYING THE REFLECTION CHARACTERISTIC OF SAID AUXILIARY ANTENNA AT THE FREQUENCY OF THE APPLIED SAID LOW FREQUENCY SIGNAL FOR PROVIDING AN AMPLITUDE MODULATED REFLECTED SIGNAL TO SAID FIRST MENTIONED ANTENNA TO PROVIDE A LOW FREQUENCY COMPONENT IN THE SAID OSCILLATOR-DETECTOR CIRCUIT COMPARABLE TO A DOPPLER BEAT FREQUENCY FOR TEST PURPOSES.
Claim 2
Dependent Claim
161 words
IN A DETECTION APPARATUS HAVING A HIGH FREQUENCY TRANSMITING AND RECEIVING ANTENNA AND AN ASSOCIATED OSCILLATOR-DETECTOR CIRCUIT FOR TRANSMITTING HIGH FREQUENCY RADIO SIGNALS IN A CONFINED BEAM AND FOR RECEIVING A DOPPLER MODIFIED SIGNAL REFLECTED FROM A MOVING BODY PASSING THROUGH SAID BEAM AND MIXING SAID TRANSMITTED AND SAID RECEIVED SIGNALS IN SAID OSCILLATOR-DETECTOR TO PROVIDE A LOW FREQUENCY DOPPLER BEAT FREQUENCICY AND A LOW FREQUENCY SIGNAL OUTPUT CORRESPONDING TO SAID DOPPLER BEAT FREQUENCY; AN AUXILIARY ANTENNA ADJACENT THE FIRST MENTIONED ANTENNA FOR PROVIDING REFLECTION OF PART OF SAID HIGH FREQUENCY RADIO SIGNALS TO SAID FIRST MENTIONED ANTENNA, AND MEANS FOR APPLYING A LOW FREQUENCY SIGNAL TO SAID AUXILIARY ANTENNA FOR VARYING THE REFLECTION CHARACTERISTIC OF SAID AUXILIARY ANTENNA AT THE FREQUENCY OF THE APPLIED SAID LOW FREQUENCY SIGNAL FOR PROVIDING AN AMPLITUDE MODULATED REFLECTED SIGNAL TO SAID FIRST MENTIONED ANTENNA TO PROVIDE A LOW FREQUENCY COMPONENT IN THE SAID OSCILLATOR-DETECTOR CIRCUIT COMPARABLE TO A DOPPLER BEAT FREQUENCY FOR TEST PURPOSES.
References Cited (Backward Citations)
US2510299A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-04 | 1968-02-03 | 1968-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-04 | 1972-02-03 | 1972-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-04 | 1976-02-03 | 1976-08-04 | $7700.00 | Window Closed / Lapsed |