US3840847A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Restoration circuitry for a traffic light control system
Assignee: LITE RO
•
Filing: 1973-11-14
•
Granted: 1974-10-08
•
Expires: 1993-11-14
Abstract
Abstract A traffic control system for intersecting roads or streets is provided controlled by a traffic light system, and the present circuitry provides a means which acts, in response to a temporary traffic control mode of operation, to interrupt and hold the master timing means in such a way that upon termination of said temporary mode of operation, a go-ahead signal, facing the major one of said roads, will always be initially generated in order to move the traffic through said intersection along said major road. In addition, the present circuitry insures that said go-ahead signal, which initially permits traffic flow, will be in existence for at least a predetermined minimum amount of time and that thereafter within a reasonable time each of said intersecting roads will be subjected to a go-ahead signal in accordance with said traffic light system phasing into normal operation.
Inventors
- 👤 E Coll
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:35
CPC Classifications
G; G08; G08G; G08G1/00; G08G1/07
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
164 words
Restoration circuitry to be used with a traffic control system which employs both temporary and normal control means and which distinguishes between a major highway and secondary highways at an intersection and wherein said normal control means has reset means to insure that it will always start a cycle related to said major highway, comprising in combination activate signal receiving means to receive an activate signal indicating that said traffic control system has been seized by said temporary control means; first switching means connected to said activate signal receiving means to provide a plurality of control signals in response to receiving said activate signal; second switching means connected to said first switching means and to said reset means of said normal control means to receive one of said plurality of control signals and in response thereto operate with said reset means to insure that said normal control means will start a cycle related to said major highway upon the termination of said activate signal.
Claim 2
Dependent Claim
164 words
Restoration circuitry to be used with a traffic control system which employs both temporary and normal control means and which distinguishes between a major highway and secondary highways at an intersection and wherein said normal control means has reset means to insure that it will always start a cycle related to said major highway, comprising in combination activate signal receiving means to receive an activate signal indicating that said traffic control system has been seized by said temporary control means; first switching means connected to said activate signal receiving means to provide a plurality of control signals in response to receiving said activate signal; second switching means connected to said first switching means and to said reset means of said normal control means to receive one of said plurality of control signals and in response thereto operate with said reset means to insure that said normal control means will start a cycle related to said major highway upon the termination of said activate signal.
Claim 3
Dependent Claim
40 words
Restoration circuitry according to claim 1 wherein said second switching means includes a timing means which staRts timing for a predetermined time after said activate signal has terminated and continues to operate with said reset means for said predetermined time.
Claim 4
Dependent Claim
74 words
Restoration circuitry means according to claim 2 wherein there is inclined third switching means connected to said second switching means and to said normal control means, said third switching means formed to switch in response to switching activity by said second switching means whereby said connection to said normal control means acts to aid said reset means in causing said normal control means to always start in a cycle related to said major highway.
Claim 5
Dependent Claim
57 words
Restoration circuitry means according to claim 2 wherein third switching means is included connected to said second switching means and said normal control means, said third switching means formed to be responsive to said second switching means after said predetermined time to operate with said normal control means to insure a cycle related to said secondary highways.
Claim 6
Dependent Claim
87 words
Restoration circuitry means according to claim 2 wherein third switching means is included and wherein said third switching means is connected to said first switching means and has a timing means therein and wherein there is further included a caution light as part of said traffic control system connected to said third switching means and wherein said caution light is illuminated for a predetermined period of time in response to said last mentioned timing means being activated in response to a switching of said first switching means.
Claim 7
Dependent Claim
84 words
Restoration circuitry means according to claim 5 wherein said third switching means further includes stop light means connected to said normal control means and which will act to illuminate stop lights to said major highway when said temporary controller has provided a go-ahead light to one of said secondary highways and wherein said third switching means will return the control of said red lights to said normal control at the end of said predetermined time of said timing means of said third switching means.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-07 | 1978-04-08 | 1978-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-07 | 1982-04-08 | 1982-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-07 | 1986-04-08 | 1986-10-08 | $7700.00 | Window Closed / Lapsed |