Impulse sensor with mechanical preamplification and noise cancellation

Abstract From the Canadian patent

Abstract of the Disclosure, An impulse sensor comprises a first Piezo electric disc (25) with two oppositely polarized halves disposed symmetrically about a reference plane including the rib (26) of a thin wall of the transducer container vessel and pressed on to the thin wall and, a second Piezo electric disc (29) with the same polarization for both halves disposed symmetrically about the reference plane and pressed onto a rigid wall of the transducer container vessel. The impulses transversely acting on an impulse receiving member extending from the thin wall generate electric signals of high signal-to-noise ratio from the first Piezo electric disc (25) and electric signals of low …