SAFETY ARRANGEMENT FOR PROTECTING AGAINST THE LOCKING OF WHEELS IN MOTOR VEHICLES

An arrangement for safely protecting against the stoppage of a wheel while driving on a road surface in a vehicle. A signal generator provides an electrical alternating current signal having a frequency proportional to the angular velocity of a wheel of the vehicle. A low pass filter connected to the output of the signal generator converts the alternating current signal into a first DC signal having a magnitude which varies in accordance with variations in the frequency of the alternating current signal. A pressure reducing valve connected in the braking line is used to regulate the intensity of the braking by being operated through an amplifier which, in turn, is connected to a comparator. An integrator in the comparator provides a second DC signal which depends on the angular velocity of a wheel of the vehicle. A threshold switch also within the comparator is connected to the integrator and receives the second DC signal.