Dual battery recharger with backup power feature for use in systems having a base unit and battery-powered portable unit
US5578875A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 1, 1994 |
| Grant date | Nov 26, 1996 |
| Priority date | — |
| Expiry date | Jun 1, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M1/725
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An alternative power supply apparatus for use in association with systems having a base unit connected to an external power supply and an associated battery-powered portable unit. The alternative power supply apparatus includes two rechargeable batteries one of which serves to provide electrical power to the portable unit. There are two ports associated with the base unit, each port operably and detachably accepts one of the two rechargeable batteries. The apparatus further includes a voltage regulator which provides regulated voltage to circuitry in the base unit. Two current sources each associated with a respective one of the two ports provides an electrical current to the batteries when they are operably accepted by the ports. The second rechargeable battery, which is interchangeable with the first rechargeable battery, provides a source voltage to the voltage regulator upon failure of the external power supply.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.