| 摘要 |
A carrying case alarm system has a time-delay mechanism for initiating an alarm signal at some predetermined time after theft of the carrying case has occurred, thereby enabling the owner of the case to separate himself from the thief prior to initiation of the alarm signal. The system comprises a first switch positioned for operation by a carrying handle on the case, the switch being connected to energize an electromagnet for actuating a pivotal lever. The lever is pivoted by a spring but impeded in its motion by a dashpot, said lever being positioned to close a second switch for energizing the alarm after a predetermined time depending on the pivotal speed of the lever as limited by the dashpot.
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