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US3182312A
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Vehicle detection and counting system
Assignee: Laboratory For Electronics Inc
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Filing: 1962-01-11
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Granted: 1965-05-04
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Expires: 1982-01-11
Abstract
No abstract record available.
Inventors
- 👤 Charles K Daniels
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:27
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/88; G01S13/91; G01S13/92; G08; G08G; G08G1/00; G08G1/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
A DETECTOR OF OBJECTS MOVING ALONG A PATH INCLUDING MEANS FOR TRANSMITTING A BEAM OF HIGH FREQUENCY WAVES AT AN ANGLE ACROSS SAID PATH TO BE INTERCEPTED BY SAID OBJECTS AND FOR RECEIVING SUCH WAVES REFLECTED FROM SAID OBJECTS AND DOPPLER SHIFTED IN FREQUENCY BY THE COMPONENT IN THE DIRECTION OF SAID TRANSMITTER-RECEIVER OF THE MOTION OF SAID OBJECT ALONG SAID PATH AND MEANS FOR DERIVING A BEAT FREQUENCY SIGNAL REPRESENTATIVE OF THE FREQUENCY DIFFERENCE BETWEEN SAID TRANSMITTED AND RECEIVED REFLECTED WAVES, A TRANSISTORIZED AMPLIFIER FOR SAID BEAT FREQUENCY SIGNAL, SOLID-STATE FULL WAVE RESPONDING AND RECTIFYING MEANS COUPLED TO SAID AMPLIFIER TO DERIVE A DIRECT CURRENT SIGNAL POSITIVE AND NEGATIVE PHASES OF SAID AMPLIFIED BEAT FREQUENCY SIGNAL AND A TRANSISTOR TRIGGER CIRCUIT CONTROLLED BY SAID DIRECT CURRENT SIGNAL FOR PROVIDING AN OUTPUT CHANGE IN RESPONSE TO SAID BEAT FREQUENCY SIGNAL.
Claim 2
Dependent Claim
140 words
A DETECTOR OF OBJECTS MOVING ALONG A PATH INCLUDING MEANS FOR TRANSMITTING A BEAM OF HIGH FREQUENCY WAVES AT AN ANGLE ACROSS SAID PATH TO BE INTERCEPTED BY SAID OBJECTS AND FOR RECEIVING SUCH WAVES REFLECTED FROM SAID OBJECTS AND DOPPLER SHIFTED IN FREQUENCY BY THE COMPONENT IN THE DIRECTION OF SAID TRANSMITTER-RECEIVER OF THE MOTION OF SAID OBJECT ALONG SAID PATH AND MEANS FOR DERIVING A BEAT FREQUENCY SIGNAL REPRESENTATIVE OF THE FREQUENCY DIFFERENCE BETWEEN SAID TRANSMITTED AND RECEIVED REFLECTED WAVES, A TRANSISTORIZED AMPLIFIER FOR SAID BEAT FREQUENCY SIGNAL, SOLID-STATE FULL WAVE RESPONDING AND RECTIFYING MEANS COUPLED TO SAID AMPLIFIER TO DERIVE A DIRECT CURRENT SIGNAL POSITIVE AND NEGATIVE PHASES OF SAID AMPLIFIED BEAT FREQUENCY SIGNAL AND A TRANSISTOR TRIGGER CIRCUIT CONTROLLED BY SAID DIRECT CURRENT SIGNAL FOR PROVIDING AN OUTPUT CHANGE IN RESPONSE TO SAID BEAT FREQUENCY SIGNAL.
References Cited (Backward Citations)
US2965893A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-05-03 | 1968-11-02 | 1969-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-05-03 | 1972-11-02 | 1973-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-05-03 | 1976-11-02 | 1977-05-04 | $7700.00 | Window Closed / Lapsed |