Abstract: The present invention refers to an electronic control device applicable to anti-skid equipment in automobile vehicles which compares the speed of the wheel with a voltage corresponding to the level of optimum vehicle-wheel slip. On the basis of the result of this comparison, the device operates an actuating system that increases or decreases the pressure on the brakes with the aim of maintaining the slip of the wheel around the skid for which maximum adherence is presented.

Abstract: The present invention relates to a surge arrester or transient voltage clipper device comprising a quasi-monocrystalline semiconductor (silicon for instance), with an extra large etch pit density or low-angle boundary grains. At these dislocation lines the dopant is present in a larger concentration, and multiple p.sup.+-n.sup.+ junctions are formed preferentially at these grain boundaries as an external impurity of the opposite type to the background dopant is diffused preferentially through these dislocation lines.

Abstract: The present invention relates to improvements in electronic control for the ignition advance for automobiles. The purpose of the present invention is to provide, on the basis of a given control signal, an advance in the relation between the firing point of the spark and top dead center in the cylinder, as a function of an advance curve by known means such as centrifugal, manifold vacuum, position of the throttle butterfly or of other parameters (engine temperature, ambient temperature, etc...).

Abstract: A pressure control valve applicable to anti-skid devices in automobile vehicles is provided with two hydraulically independent fluid circuits. One circuit controls the actuation of vehicle's brakes and the other circuit controls the braking effect of the vehicle's wheels to avoid skidding of the vehicle. Both circuits are related through the functions of two pistons, one piston being for storage to serve as an intermediary between a control fluid and a spring which accumulates energy and work as a differential piston, and the other piston being for the main actuation of the valve. The axial movements of the pistons allow the brake circuit fluid to compress or decompress as well as to open and close a valve which connects the conventional brake circuit to the anti-skid system.

Abstract: A system of capacitive discharge ignition for automobile vehicles with a converter governed by a multi-vibrator, maintains constantly the maximum working current in the power circuit, independently of the feed voltage, by the control of the time of commutation of the multi-vibrator, by using a diode of the Zener type. The diode is connected in parallel with the collector-emitter section of the transistor of the multi-vibrator which is normally shorted to charge the commutation condenser at a fixed voltage which is lower than the lowest value of the voltage of utilization. A transistor with a battery sensor circuit short-circuits part of the resistance of the charging circuit of the condenser when the voltage is higher than a pre-fixed value.