Systems and methods for deactivation frequency reduction using a transformer
US10964183B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 3, 2018 |
| Grant date | Mar 30, 2021 |
| Priority date | — |
| Expiry date | Apr 3, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B13/248
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
Systems and methods for deactivating an Electronic Article Surveillance (“EAS”) tag. The methods comprising: using an AC drive signal to charge an energy storage component of the tag deactivator; selectively actuating a switch so that a closed circuit is formed between the energy storage component and at least one deactivation coil of the tag deactivator; generating a tag deactivation field to deactivate the EAS tag by energizing the at least one deactivation coil with current supplied from the energy storage component; and using a step down transformer, disposed between the energy storage component and the at least one deactivation coil, to decrease a frequency of a decaying coil current waveform representing a current flowing through the at least one deactivation coil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.