Programme memory for automatic sequence control - uses fixed and moving photosensitive heads and moving strip containing light and dark zones

摘要

The programmer memory consists of a surface passing in front of fixed and moving photodetectors. It has a semi-rigid support (1) of a dark colour with a mat side treated to not retain adhesive materials. A light coating (2) which can be peeled back (3) is attached by adhesive to the semi-rigid support and has on its other face suitable markings to guide the programmer onto the program to be effected. Portions of the covering may be removed after cutting to reveal the dark surface beneath. The fixed readers (4), photosensitive to light emitted by an associated lamp (6), detect the different light and dark zones on the surface for switching over a value following a connection value. The moving readers (5) photosensitive to the light emitted by an associated lamp (7) detects the contours of light zones on the surface replacing the contour length with simultaneous variations of analogous size.