US3239653A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Traffic density computer
Assignee: Laboratory For Electronics Inc
•
Filing: 1960-09-08
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Granted: 1966-03-08
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Expires: 1980-09-08
Abstract
No abstract record available.
Inventors
- 👤 John L Barker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:52
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/48; G06G7/76; G06G7/12; G06G7/16; G06G7/163; G08; G08G; G08G1/00; G08G1/01; G08G1/0104
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
192 words
A DEVICE FOR DETERMINING THE DENSITY OF TRAFFIC PASSING ALONG A ROADWAY COMPRISING: A TRAFFIC VOLUME COMPUTER INCLUDING A VEHICLE DETECTING MEANS, AND AN IMPULSE GENERATING MEANS FOR GENERATING ELECTRICAL IMPULSES UPON DETECTION OF A PASSING VEHICLE BY SAID VEHICLE DETECTING MEANS, MEANS FOR CONVERTING THE ELECTRICAL IMPULSES GENERATED BY SAID GENERATING MEANS TO A DIRECT CURRENT VOLTAGE PROPORTIONAL TO THE NUMBER OF VEHICLES DETECTED BY SAID VEHICLE DETECTOR PER UNIT TIME; A SPEED COMPUTER INCLUDING MEANS FOR OBTAINING A SIGNAL REPRESENTATIVE OF THE SPEED OF THE PASSING VEHICLES, A MECHANICAL OUTPUT SHAFT OF SAID SPEED COMPUTER AND MEANS FOR POSITIONING SAID OUTPUT SHAFT IN ACCORDANCE WITH THE SPEED SIGANL; A FURTHER COMPUTER INCLUDING A POTENTIOMETER HAVING A RESISTANCE ELEMENT AND A CONTACT ARM MECHANICALLY LINKED TO SAID OUTPUT SHAFT, A DENSITY DIRECT CURRENT VOLTAGE APPLIED ACROSS SAID POTENTIOMETER RESISTANCE ELEMENT, VOLTAGE COMPARISON MEANS, MEANS ELECTRICALLY CONNECTING THE POTENTIAL OF SAID ARM TO SAID COMPARISON MEANS, MEANS ELECTRICALLY CONNECTING SAID DIRECT CURRENT VOLTAGE OUTPUT TO SAID COMPARISON MEANS, AND MEANS CONTROLLED BY SAID COMPARISON MEANS FOR ALTERING SAID DENSITY DIRECT CURRENT VOLTAGE IN ACCORDANCE WITH A COMPARISON MADE BY SAID COMPARISON MEANS.
Claim 2
Independent Claim
192 words
A DEVICE FOR DETERMINING THE DENSITY OF TRAFFIC PASSING ALONG A ROADWAY COMPRISING: A TRAFFIC VOLUME COMPUTER INCLUDING A VEHICLE DETECTING MEANS, AND AN IMPULSE GENERATING MEANS FOR GENERATING ELECTRICAL IMPULSES UPON DETECTION OF A PASSING VEHICLE BY SAID VEHICLE DETECTING MEANS, MEANS FOR CONVERTING THE ELECTRICAL IMPULSES GENERATED BY SAID GENERATING MEANS TO A DIRECT CURRENT VOLTAGE PROPORTIONAL TO THE NUMBER OF VEHICLES DETECTED BY SAID VEHICLE DETECTOR PER UNIT TIME; A SPEED COMPUTER INCLUDING MEANS FOR OBTAINING A SIGNAL REPRESENTATIVE OF THE SPEED OF THE PASSING VEHICLES, A MECHANICAL OUTPUT SHAFT OF SAID SPEED COMPUTER AND MEANS FOR POSITIONING SAID OUTPUT SHAFT IN ACCORDANCE WITH THE SPEED SIGANL; A FURTHER COMPUTER INCLUDING A POTENTIOMETER HAVING A RESISTANCE ELEMENT AND A CONTACT ARM MECHANICALLY LINKED TO SAID OUTPUT SHAFT, A DENSITY DIRECT CURRENT VOLTAGE APPLIED ACROSS SAID POTENTIOMETER RESISTANCE ELEMENT, VOLTAGE COMPARISON MEANS, MEANS ELECTRICALLY CONNECTING THE POTENTIAL OF SAID ARM TO SAID COMPARISON MEANS, MEANS ELECTRICALLY CONNECTING SAID DIRECT CURRENT VOLTAGE OUTPUT TO SAID COMPARISON MEANS, AND MEANS CONTROLLED BY SAID COMPARISON MEANS FOR ALTERING SAID DENSITY DIRECT CURRENT VOLTAGE IN ACCORDANCE WITH A COMPARISON MADE BY SAID COMPARISON MEANS.
References Cited (Backward Citations)
US2874367A
Cited
US2850236A
Cited
US2933716A
Cited
US2978180A
Cited
US2908891A
Cited
US3047838A
Cited
US3024443A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-07 | 1969-09-06 | 1970-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-07 | 1973-09-06 | 1974-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-07 | 1977-09-06 | 1978-03-08 | $7700.00 | Window Closed / Lapsed |