| 摘要 |
A shield (5) is serving the purpose of preventing a bystander undesired from being able to read the pin code of another person while the latter is keying in on the keyboard (2) of a magnetic card apparatus (1). The shield has the shape of a calotte, which arches over the keyboard with a front opening to take in the fingers of a hand in order to operate the keyboard. The side walls (6) of the calotte are opaque, while in its top wall (7) there are a number of transparent sections (14) which are limited by a grating (12) with open spaces or are formed by elevations or depressions in a transparent plate. The sections are constructed in such a way that the keyboard can be seen of a person in position for use at the machine, and only by this person. Thereby the possibility is eliminated that unauthorised persons, acting as bystanders when operation of the keyboard of the magnetic card apparatus takes place, can have knowledge of the pin code used in the operation and then abuse this knowledge in drawing money from the bank account of the holder of the magnetic card. |
