| 摘要 |
<p>An anti-tamper device (10) comprises a collar (15) comprising a lock cylinder head receiving portion (16). The head receiving portion (16) is dimensioned to allow a head (14) of a cylinder mortice lock to fit within the aperture of the receiving portion (16). The collar (15) substantially completely surrounds the protruding portion of the cylinder lock mounted in a door. The device (10) further comprises a keyhole access aperture (18) which allows an authorised person to insert a key into a keyhole in the cylinder lock.</p> |
