| 摘要 |
<p>The invention concerns a mechanically controlled security device for doors, which are opened by keying a secret code combination, characterised in that the composition of the combination of alphanumeric symbols figures and/or letters consists in a number of successive pressures on each key/push-button (1) equal to the numerical value of the corresponding symbol, and the retraction of the closing member, bolt and/or mobile shutter (11) occurs automatically, and when the door is completely closed, this automatically and simultaneously causes the security device to be locked and the secret code combination to be scrambled/reset and the safety device simultaneously controls one or several bolts (8) for closing the door and/or a mobile shutter (6) to mask the keyhole of a conventional lock.</p> |
