Control and alarm system e.g. for credit cards

摘要

The system includes electrical contacts (1) in insertions (4) used for keeping the cards in e.g. a purse. The contacts are connected with an acoustic signal generator (2) at which a timer is provided for time setting. The time between taking out the card and generation of the alarm sound can be set. Preferably, a reading chip (3) is provided for one or several insertions for cards. The reading chip is coupled to a display (5).