Electroacoustic Transducer Having Compression Screw Mechanical Bias
Patent application, Filed 4 Oct 1999
DEPARTMENT OF THE NAVY WASHINGTON DC
Pagination or Media Count:
An electroacoustic transducer has a housing having an axial threaded bore. A transducer driver element is axially aligned in the bore and has a first end mounted on an electrically conductive holder that is axially displaceable by a conductive screw member having threads that mate with the threaded bore. A hemisphere on the other end of the driver element contacts a diaphragm for radiating acoustic signals. An electrical connector has a conductive coil spring coupled to the screw member and is electrically connected to the first end of the driver element via the coil spring, screw member, holder, and mounting plug. Another electrical connector is connected to the other end of the driver element via a conductive front plate, diaphragm, and hemisphere in one embodiment or a flexible lead in another embodiment. In both embodiments, the electrical connectors couple electrical driving signals to the driver elements to cause the driver elements to mechanically vibrate the screw members exert compressive bias to prevent the driver elements from developing excessive tensile stress when they vibrate the hemispheres establish a controlled point of contact at the surface of the diaphragm to reduce the possibility of fracturing the driver elements and the holders and plugs prevent transfer of torsional loads from the screw members to the driver elements.
- Electricity and Magnetism
- Couplers, Fasteners and Joints