发明名称 |
ELECTRONIC IDENTIFICATION DEVICE |
摘要 |
The device consists of a key having a passive memory zone and a circulating register, the code contained in the passive zone being intended to be transferred to the circulating register when the key is introduced into a lock, so that the said code may be transferred from the circulating register to the lock to be compared there with a reference code contained in the lock. The key comprises a circuit which is provided with a counter which is incremented each time voltage is applied to the key and a system for resetting the counter to zero, when the code is successfully transferred from the key, so that after a number of attempts determined by the counter of unsuccessful transfer attempts, the passive memory zone is destroyed by the output signal emitted by the counter. |
申请公布号 |
DE3475125(D1) |
申请公布日期 |
1988.12.15 |
申请号 |
DE19843475125 |
申请日期 |
1984.05.10 |
申请人 |
SAVOYET, JEAN-LOUIS PAUL JULES;MOLE, ALAIN MARIE-LOUIS |
发明人 |
SAVOYET, JEAN-LOUIS PAUL JULES |
分类号 |
G06K19/073;G07F7/10;(IPC1-7):G07F7/10;G06K19/06 |
主分类号 |
G06K19/073 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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