Indicator apparatus or, respectively, accountant, specially for the compute of vehicles that go through the measurement links provided in the urban areas. (Machine-translation by Google Translate, not legally binding)

摘要

An indicating device or counter, which is actuable by means of the pulses of a test switch dependent on a threshold value and governable by rapid variations in the state of measuring electrodes, especially for the calculation of vehicles passing through measuring loops arranged in urban areas, for which it evaluates the variations of the inductance of said measurement loops, inherent to it, characterized in that, in order to make a distinction between rapid variations, usable as measuring impulses, and slow, disturbing variations of the state of the measuring electrodes, these are connected to a circuit arrangement of reference or bridge of measurements automatically balanced, known per se, whose inert regulating organ constantly adjusts them to the value of the nominal state, for example, zero, are connected to a reference circuit arrangement or bridge of measurements balanced auto it is known, whose inert regulating device constantly adjusts them to the value of the nominal state, for example, zero, according to the slow variations of the state of the measuring electrodes, thus preventing the reaction of the test switch, dependent on the value of threshold, before slow variations of the state of the measurement electrodes. (Machine-translation by Google Translate, not legally binding)