| 摘要 |
<p>The alarm apparatus, intended particularly to conveying brief-cases, provides a warning in case of attack from a criminal and has a working mode in two times. Upon an accidental setting off of the alarm, the alarm may be stopped so that the second phase is not started. The alarm apparatus is arranged so that an efficient alarm in two phases is set off and in case of an unintentional setting off, the first phase may be stopped. Furthermore, the alarm apparatus facilitates the arrest of the criminal. The alarm apparatus comprises at least one electric loop with contacts, a detector circuit, a priming circuit and warning devices. The electric loop is connected to the detector and priming circuits and the warning devices are divided into two warning groups. The first group is directly connected to the detector and priming circuits. A delay circuit is arranged between the detector and priming circuits and the second warning group.</p> |
