US3355707A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for vehicle detection
Assignee: Bunker Ramo Corp
•
Filing: 1964-05-11
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Granted: 1967-11-28
•
Expires: 1984-05-11
Abstract
No abstract record available.
Inventors
- 👤 Ralph J Koerner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:00
CPC Classifications
G; G08; G08G; G08G1/00; G08G1/01; G08G1/042
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
A SYSTEM FOR DETECTING VEHICLES COMPRISING: SENSING MEANS HAVING AN OUTPUT WINDING PROVIDING AN OUTPUT SIGNAL WHOSE AMPLITUDE IS SUBSTANTIALLY PROPORTIONAL TO MAGNETIC FIELD INTENSITY THROUGH A DEFINED SAMPLING AREA; MEANS FOR SUPPORTING SAID SENSING MEANS FOR LOCATING SAID SAMPLING AREA ADJACENT TO A PATH ON WHICH VEHICLES ARE TO BE DETECTED; DEMODULATOR MEANS PROVIDING A DIRECT VOLTAGE SIGNAL IN RESPONSE TO SAID OUTPUT SIGNAL; A SOURCE PROVIDING A REFERENCE SIGNAL OF PREDETERMINED AMPLITUDE; DIFFERENCE MEANS RESPONSIVE TO AN AMPLITUDE DIFFERENCE BETWEEN SAID REFERENCE AND DIRECT VOLTAGE SIGNALS FOR PROVIDING A NEGATIVE FEEDBACK SIGNAL; CAPACITIVE DELAY MEANS COUPLING SAID FEEDBACK SIGNAL TO SAID OUTPUT WINDING FOR CONTROLLING SAID OUTPUT SIGNAL AFTER A PREDETERMINED TIME INTERVAL; UTILIZATION MEANS; AND CONTROL MEANS RESPONSIVE TO SAID DIRECT VOLTAGE SIGNAL FOR ENERGIZING SAID UTILIZATION MEANS.
Claim 2
Independent Claim
131 words
A SYSTEM FOR DETECTING VEHICLES COMPRISING: SENSING MEANS HAVING AN OUTPUT WINDING PROVIDING AN OUTPUT SIGNAL WHOSE AMPLITUDE IS SUBSTANTIALLY PROPORTIONAL TO MAGNETIC FIELD INTENSITY THROUGH A DEFINED SAMPLING AREA; MEANS FOR SUPPORTING SAID SENSING MEANS FOR LOCATING SAID SAMPLING AREA ADJACENT TO A PATH ON WHICH VEHICLES ARE TO BE DETECTED; DEMODULATOR MEANS PROVIDING A DIRECT VOLTAGE SIGNAL IN RESPONSE TO SAID OUTPUT SIGNAL; A SOURCE PROVIDING A REFERENCE SIGNAL OF PREDETERMINED AMPLITUDE; DIFFERENCE MEANS RESPONSIVE TO AN AMPLITUDE DIFFERENCE BETWEEN SAID REFERENCE AND DIRECT VOLTAGE SIGNALS FOR PROVIDING A NEGATIVE FEEDBACK SIGNAL; CAPACITIVE DELAY MEANS COUPLING SAID FEEDBACK SIGNAL TO SAID OUTPUT WINDING FOR CONTROLLING SAID OUTPUT SIGNAL AFTER A PREDETERMINED TIME INTERVAL; UTILIZATION MEANS; AND CONTROL MEANS RESPONSIVE TO SAID DIRECT VOLTAGE SIGNAL FOR ENERGIZING SAID UTILIZATION MEANS.
References Cited (Backward Citations)
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US2685680A
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US2943306A
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US2917732A
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US3237155A
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US3249915A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-11-27 | 1971-05-29 | 1971-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-27 | 1975-05-29 | 1975-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-27 | 1979-05-29 | 1979-11-28 | $7700.00 | Window Closed / Lapsed |