Traveller's voltage converter for automatically selecting load wattage
US5589760A · kind A · utility
Inventor
Key dates
| Filing date | Sep 5, 1995 |
| Grant date | Dec 31, 1996 |
| Priority date | — |
| Expiry date | Sep 5, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F1/13
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A voltage converter for traveller's uses includes: a 50 watts (0-50 W) transformer for converting an input voltage of 220 VAC to an output voltage of 110 VAC for normally powering a load of 50 watts or less; a 1600 watts (50-1600 W) transformer for converting an intput voltage of 220 VAC to an output voltage of 110 VAC for powering a load ranging from 50 watts to 1600 watts; and a sensing control circuit operatively sensing an output load having a power rating larger than 50 watts (50 W to 1600 W) for operatively actuating a relay for automatically switching an output terminal of the 50 watts transformer to the output terminal of the 1600 watts transformer for preventing burning or damaging of the output load connected with the voltage converter and for protecting the voltage converter itself.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.