US3305828A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Progressive traffic signal control system
Assignee: SPX Technologies Inc
•
Filing: 1964-04-07
•
Granted: 1967-02-21
•
Expires: 1984-04-07
Abstract
No abstract record available.
Inventors
- 👤 Jr John H Auer
- 👤 Jerry P Huffman
- 👤 Terence W Brady
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:55
CPC Classifications
G; G08; G08G; G08G1/00; G08G1/07; G08G1/081; G08G1/082
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
171 words
IN A CONTROL SYSTEM FOR TRAFFIC MOVING ALONG A PLURALITY OF SUCCESSIVE ROUTE SECTIONS, A FIRST PLURALITY OF TRAFFIC SIGNALS GOVERNING TRAFFIC MOVING ALONG A FIRST ROUTE SECTION, A SECOND PLURALITY OF TRAFFIC SIGNALS GOVERNING TRAFFIC MOVING ALONG A SECOND ROUTE SECTION, FIRST CONTROL MEANS FOR EACH TRAFFIC SIGNAL FOR DEMARCATING A SIGNAL CYCLE OF PREDETERMINED DURATION AT ANY GIVEN TIME, SECOND CONTROL MEANS FOR AT TIMES SHIFTING THE TIME PHASE OF THE SUCCESSIVE SIGNAL CYCLES DEMARCATED BY THE RESPECTIVE CONTROL MEANS FOR AT LEAST ONE OF SAID TRAFFIC SIGNALS OF SAID FIRST PLURALITY RELATIVE TO THAT OF ANY OTHER OF SAID FIRST PLURALITY OF TRAFFIC SIGNALS, AND THIRD CONTROL MEANS FOR MAINTAINING A PREDETERMINED PHASE RELATIONSHIP BETWEEN THE SIGNAL CYCLES DEMARCATED BY THE SAID FIRST CONTROL MEANS FOR A SELECTED ONE OF SAID SECOND PLURALITY OF TRAFFIC SIGNALS AND THE SIGNAL CYCLES DEMARCATED BY SAID FIRST CONTROL MEANS FOR SAID ONE OF SAID FIRST PLURALITY OF TRAFFIC SIGNALS IN RESPONSE TO SAID SHIFTS IN PHASE PRODUCED BY SAID SECOND MEANS.
Claim 2
Dependent Claim
171 words
IN A CONTROL SYSTEM FOR TRAFFIC MOVING ALONG A PLURALITY OF SUCCESSIVE ROUTE SECTIONS, A FIRST PLURALITY OF TRAFFIC SIGNALS GOVERNING TRAFFIC MOVING ALONG A FIRST ROUTE SECTION, A SECOND PLURALITY OF TRAFFIC SIGNALS GOVERNING TRAFFIC MOVING ALONG A SECOND ROUTE SECTION, FIRST CONTROL MEANS FOR EACH TRAFFIC SIGNAL FOR DEMARCATING A SIGNAL CYCLE OF PREDETERMINED DURATION AT ANY GIVEN TIME, SECOND CONTROL MEANS FOR AT TIMES SHIFTING THE TIME PHASE OF THE SUCCESSIVE SIGNAL CYCLES DEMARCATED BY THE RESPECTIVE CONTROL MEANS FOR AT LEAST ONE OF SAID TRAFFIC SIGNALS OF SAID FIRST PLURALITY RELATIVE TO THAT OF ANY OTHER OF SAID FIRST PLURALITY OF TRAFFIC SIGNALS, AND THIRD CONTROL MEANS FOR MAINTAINING A PREDETERMINED PHASE RELATIONSHIP BETWEEN THE SIGNAL CYCLES DEMARCATED BY THE SAID FIRST CONTROL MEANS FOR A SELECTED ONE OF SAID SECOND PLURALITY OF TRAFFIC SIGNALS AND THE SIGNAL CYCLES DEMARCATED BY SAID FIRST CONTROL MEANS FOR SAID ONE OF SAID FIRST PLURALITY OF TRAFFIC SIGNALS IN RESPONSE TO SAID SHIFTS IN PHASE PRODUCED BY SAID SECOND MEANS.
References Cited (Backward Citations)
US3120651A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-20 | 1970-08-22 | 1971-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-20 | 1974-08-22 | 1975-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-20 | 1978-08-22 | 1979-02-21 | $7700.00 | Window Closed / Lapsed |