Patent ID: 9347798
Filing Date: 2016-05-24
CPC Classification: G01D,G01V,H04R

Claim Text:
1. A hermetically sealed metal detector apparatus for locating a metallic object, comprising: a housing formed from a thermoplastic material; said housing having a diaphragm formed with said thermoplastic material on the exterior surface thereof, thereby enabling the vibration of said diaphragm at audible frequencies; a metal detector circuit disposed within said housing, which generates a magnetic field through said housing, and wherein said metal detector circuit generates an alert signal while said magnetic field is positioned in proximity to the metallic object; an oscillator that produces an oscillating signal in response to said alert signal; an acoustic transducer coupled to receive said oscillating signal and generate an acoustic signal through a transducer output port, and wherein said acoustic transducer is positioned to align said transducer output port adjacent to the interior surface of said diaphragm, thereby coupling said acoustic signal to vibrate said diaphragm, and thereby enabling said diaphragm to communicate acoustic energy to the exterior surface thereof.