Direct current power system including standby for community antenna television networks
US3987240A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 26, 1974 |
| Grant date | Oct 19, 1976 |
| Priority date | — |
| Expiry date | Jun 26, 1994 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B3/44
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A direct current power supply system for providing power, including standby, to coaxial cable amplifiers in community antenna television networks. Alternating current is rectified and used to power coaxial cable amplifiers spaced along the cable and to maintain a full charge on a storage battery which is continually connected to the input of the cable. In the event of failure of the commercial primary power source, the battery feeds power to the cable amplifiers. Provision may be made for selectively reversing the output of the power supply to insure that there will be no corrosion deposits caused by electrolysis. Finally, the invention also provides circuitry for protecting the storage battery from excessive discharge during power failures of long duration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.