Antitheft system and monitoring system
US6304181A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 18, 1999 |
| Grant date | Oct 16, 2001 |
| Priority date | — |
| Expiry date | Oct 18, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B13/2488
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
This invention provides an antitheft system comprising an antitheft gate 2 installed in the vicinity of an exit of a store, and an alarm unit 1 attached to a commodity. The gate 2 has incorporated therein a signal generator 21 for producing a notifying signal, and an alarm device 22 capable of producing an alarm. The alarm unit 1 comprises an electronic buzzer 11, a receiving antenna 15 for receiving the notifying signal from the signal generator 21 of the gate 2, and a control circuit 17 for operating the buzzer 11 upon the antenna 15 receiving the notifying signal. The alarm device 22 of the gate 2 comprises an alarm producing circuit 225 capable of producing an alarm, a receiving antenna 221 for receiving electromagnetic waves generated by the buzzer 11 by operating the buzzer 11, and a control circuit 224 for operating the alarm producing circuit 225 upon the antenna 221 receiving the electromagnetic waves. The construction described renders the alarm unit 1 compact.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.