Abstract: A method for manufacturing a circuit board on which electronic components and electrical circuits are to be mounted and connected together. The method comprises positioning mutually insulated and mutually intersecting electrical conductors in a layer of substrate material, preferably to form an x/y matrix, and treating the substrate material, with the conductors embedded therein, in a manner to establish interruptions in the various conductor paths at given locations therein, and to establish permanent electrical contact between the intersecting conductor paths at given locations of intersection. The substrate material used is sensitive to a given kind of radiation, and the material is irradiated, while screening those locations at which interruptions are to be established or at which the conductor paths are to be connected together.

Abstract: A vehicle deceleration sensing device making it possible to sense whether an occurring collision is powerful or just trivial. The device comprises a first mass body with an actuating member, a second mass body and a blocking member in the form of a cup spring preventing the second mass body from being displaced at an occurring deceleration of the vehicle until the first mass body has been displaced a predetermined distance indicating that the duration and the magnitude of said deceleration are in excess of predetermined values.