Piezoelectric ceramic ring for sound wave transducer - has two steel or titanium compression bands with frusto-conical inner surfaces fitting over metal prisms on ring surface

摘要

The ceramic ring (1) is a rectangular section torus. On the exterior cylindrical surface of this torus are arranged side by side metallic prisms (3). These metallic prisms (3) have the form in section of a triangle. The prism (3) being an isosceles triangle whose base (4) has a length equal to the width of the ring. The angles of the prism, adjacent to the base are about 5 degrees. The thickness of each prism (3) is small in relation to the width (h) and radius (r) of the ceramic torus. The base surface of each prism is a rectangle of dimensions (a) and (h). The prisms being made from titanium. The prisms (3) are arranged with a small gap between them around the exterior cylindrical surface of the torus. Onto these prisms are fixed two circular bands (5) whose internal surface frustoconical. The angle with the axis of the band is equal to alpha. These bands have a width less than h/2. The bands being of steel or titanium.