PNEUMATIC FREQUENCY COMPARATOR AND TRANSDUCER

摘要

A pneumatic frequency comparator and transducer. The preferred embodiment discloses a system which yields a pneumatic readout corresponding to the beat frequency of two acoustic inputs. The acoustic generators presented herein are the electromagnetic-type and the ringtone-oscillator-type. The former provides a pneumatic indication of the beat frequency of two AC electrical input signals and thus may be utilized as an electrical frequency demodulation device or as frequency comparator. The later allows the pneumatic monitoring of the rotational or sliding motion of a machine that is mechanically coupled to the sleeve of the ringtone oscillator which varies the nozzle-to-cavity distance therein to provide a varying frequency acoustic signal for use as an input to the preferred embodiment system.