New Design Techniques for Enhancing Fault Tolerant Cots Software Wrappers

Each movable member (1) has a disk (6) which is mounted free to rotate about an axis (5) and which includes an annular area (7) of radial stripes (8) together with three concentric coding and read areas (9, 10, 11) having holes therethrough. The read station is equipped with a compressed air blast nozzle (15) for rotating each disk (6) presented thereto, together with a branch (17A) having suitable detectors (18, 19, 20) for detecting said holes and connected to electronic decoding circuits.