Traffic synchronization device
US4462031A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 21, 1983 |
| Grant date | Jul 24, 1984 |
| Priority date | — |
| Expiry date | Jan 21, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08G1/082
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A synchronization device for the control of an automobile traffic signal in synchronization with other traffic signals in the system. A present time clock in the device operates from the local alternating current power source. The synchronization device calculates the time difference between the present time and a daily re-synchronization time, divides that time difference by the length of the operating cycle of traffic signal, and generates a synchronization pulse whenever the residue of the division is zero. An offset or time-delay is added to the synchronization pulse and the traffic signal is operated in response to the delayed synchronization pulse so as to operate with the desired time delay in coordination with the other signals in the system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.