Title:
【発明の名称】電子的に検知可能で不作動化可能な標識及びその標識を用いた電子安全装置
Document Type and Number:
Japanese Patent JPS61501947
Kind Code:
A
Abstract:
A resonant tag circuit with at least one resonant frequency operates in an electronic security system in which the tag circuit is detected and electronically deactivated in order to destroy the resonant characteristics of the tag circuit at the detection frequency. The tag circuit is designed with capacitor plates 10, 12, 22, 24 which are located closer to one another at a selected point 20, 32. In this way, a breakdown mechanism is brought about in the resonant structure of the tag. A deactivation circuit provides electromagnetic energy at a resonant frequency of the tag circuit with sufficient energy to cause electrical breakdown at the selected point 20, 32. In this way, the tag circuit is deactivated by bringing about vaporization of a conductive area or a short circuit between the capacitor plates to destroy the resonant properties of the circuit.
Inventors:
Licht Brow
Application Number:
JP50208684A
Publication Date:
September 04, 1986
Filing Date:
April 23, 1984
Export Citation:
Assignee:
Licht Blau George Jay
International Classes:
G08B13/24; G08B13/00; (IPC1-7): G08B13/00; G08B13/24
Domestic Patent References:
| JPS5230836A | 1977-03-08 | |||
| JPS5242393A | 1977-04-01 | |||
| JPS5018200A | 1975-02-26 | |||
| JPS4877695A | 1973-10-18 | |||
| JPS4860499A | 1973-08-24 |
Attorney, Agent or Firm:
Bunji Kamada