| 摘要 |
Lock equipped with a break-in detection system, characterised in that it comprises a retractable obstacle or member 8 arranged in the insertion path 9 of the key for actuating the said lock, the latter also being equipped with a contact 11 capable of being actuated directly or by means of a transmission piece 12 by the said retractable member when a key or other object is being introduced into the lock, this contact controlling the operation of an alarm device and/or a protective device known per se. <IMAGE>
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