Device for generating electrical pulses in response to shaft rotation

摘要

Two yokes of magnetic material are fixedly attached to opposite axial ends of a magnet which is revolvable about its axis with a revolving shaft, an alternating magnetic field generator is positioned in the magnetic field between the two yokes to generate alternating magnetic field with revolution of the shaft, and a magnetoelectric transducer is provided in the alternating field in order to generate a pulsating electrical signal indicative of the number of the shaft revolutions.