Time recorder with alarm function - released at desired frequency of occurrence as personnel clock off for random searching of luggage to prevent stealing

摘要

The time recorder is equipped with an alarm signal generator (4) which produces an alarm signal with a certain probability depending on the insertion of a time or clock card (a) by an employee on leaving the place of work, partic. factories making expensive articles or warehouses. The alarm proper (5) rings when receipt of the signal. It can be activated as the time of leaving is printed on the card. USE/ADVANTAGE - Random alarm relieving inspector of difficulty in distinguishing between arriving and departing personnel and ensures actual randomness without personal fear or favour.