Patent US3329932A successfully refreshed from Google Patents.
US3329932A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrasonic vehicle detection system
Assignee: SPX Technologies Inc
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Filing: 1964-07-22
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Granted: 1967-07-04
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Expires: 1984-07-22
Abstract
No abstract record available.
Inventors
- 👤 Jr John H Auer
- 👤 Lyle A Ross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:57
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/52; G01S7/523; G01S7/526; G01S7/529; G08; G08G; G08G1/00; G08G1/01; G08G1/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
193 words
A SYSTEM FOR DETECTING VEHICLES BY SENSING VIBRATIONAL ENERGY PULSES REFLECTED THEREFROM, COMPRISING IN COMBINATION, A SINGLE SONIC TRANSDUCER FOR TRANSMITTING VIBRATIONAL ENERGY ACROSS THE PATH OF SAID VEHICLES DURING SELECTED TRANSMITTING INTERVALS AND FOR PRODUCING OUTPUT VOLTAGES IN RESPONSE TO RECEIVE REFLECTIONS OF SAID ENERGY, TUNED AMPLIFIER MEANS HAVING CATHODE FEEDBACK RESISTORS COUPLED TO SAID TRANSDUCER FOR INCREASING THE AMPLITUDE OF SAID OUTPUT VOLTAGE DURING SELECTED RECEIVING INTERVALS, THRESHOLD LEVEL CONTROL MEANS FOR PRODUCING A SIGNAL WHENEVER THE OUTPUT OF SAID TUNED AMPLIFIER EXCEEDS A PREDETERMINED LEVEL DURING SAID SELECTED RECEIVING INTERVALS, FREE-RUNNING MULTIVIBRATOR MEANS COUPLED TO SAID TRANSDUCER AND SAID TUNED AMPLIFIER AND SAID THRESHOLD LEVEL CONTROL MEANS FOR PROVIDING VOLTAGE OUTPUTS TO CONTROL THE RATE OF SAID SELECTED TRANSMITTING AND RECEIVING INTERVALS, RELAY CONTROL MEANS RESPONSIVE TO SAID SIGNAL FOR PRODUCING OUTPUT ENERGY WHENEVER SAID SIGNAL IS ABSENT FOR LONGER THAN A PRESELECTED PERIOD, AND RELAY MEANS RESPONSIVE TO SAID RELAY CONTROL MEANS FOR GIVING A DISTINCTIVE INDICATION OF VEHICLE PRESENCE AND FOR CHANGING THE RESISTANCE OF SAID CATHODE RESISTORS SO AS TO INCREASE THE GAIN OF SAID TUNED AMPLIFIER WHENEVER SAID RELAY CONTROL MEANS CEASES TO PRODUCE OUTPUT ENERGY.
Claim 2
Independent Claim
193 words
A SYSTEM FOR DETECTING VEHICLES BY SENSING VIBRATIONAL ENERGY PULSES REFLECTED THEREFROM, COMPRISING IN COMBINATION, A SINGLE SONIC TRANSDUCER FOR TRANSMITTING VIBRATIONAL ENERGY ACROSS THE PATH OF SAID VEHICLES DURING SELECTED TRANSMITTING INTERVALS AND FOR PRODUCING OUTPUT VOLTAGES IN RESPONSE TO RECEIVE REFLECTIONS OF SAID ENERGY, TUNED AMPLIFIER MEANS HAVING CATHODE FEEDBACK RESISTORS COUPLED TO SAID TRANSDUCER FOR INCREASING THE AMPLITUDE OF SAID OUTPUT VOLTAGE DURING SELECTED RECEIVING INTERVALS, THRESHOLD LEVEL CONTROL MEANS FOR PRODUCING A SIGNAL WHENEVER THE OUTPUT OF SAID TUNED AMPLIFIER EXCEEDS A PREDETERMINED LEVEL DURING SAID SELECTED RECEIVING INTERVALS, FREE-RUNNING MULTIVIBRATOR MEANS COUPLED TO SAID TRANSDUCER AND SAID TUNED AMPLIFIER AND SAID THRESHOLD LEVEL CONTROL MEANS FOR PROVIDING VOLTAGE OUTPUTS TO CONTROL THE RATE OF SAID SELECTED TRANSMITTING AND RECEIVING INTERVALS, RELAY CONTROL MEANS RESPONSIVE TO SAID SIGNAL FOR PRODUCING OUTPUT ENERGY WHENEVER SAID SIGNAL IS ABSENT FOR LONGER THAN A PRESELECTED PERIOD, AND RELAY MEANS RESPONSIVE TO SAID RELAY CONTROL MEANS FOR GIVING A DISTINCTIVE INDICATION OF VEHICLE PRESENCE AND FOR CHANGING THE RESISTANCE OF SAID CATHODE RESISTORS SO AS TO INCREASE THE GAIN OF SAID TUNED AMPLIFIER WHENEVER SAID RELAY CONTROL MEANS CEASES TO PRODUCE OUTPUT ENERGY.
References Cited (Backward Citations)
US3255434A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-03 | 1971-01-02 | 1971-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-03 | 1975-01-02 | 1975-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-03 | 1979-01-02 | 1979-07-04 | $7700.00 | Window Closed / Lapsed |