Abstract: A piezoelectric resonator assembly comprises a single integral plate which is cut to form a peripheral region for supporting a resonator, a central resonating region for resonating in the longitudinal mode, surface-shear mode, or bending mode, and at least two oppositely positioned arms for fastening the peripheral region to the central region at opposite points on the central resonating region. The arms are positioned at nodal zones of the central resonating region. There is a single gap between the peripheral region and the central resonating region at each position about the central resonating region except at the positions of the arms. The entire upper and lower surfaces of the plate are continuous and have metal plates formed thereon for forming the excitation electrodes of the central resonating region. The metallized plates are attached to leads at the peripheral region.

Abstract: A suspension element for fastening a piezoelectric resonator to a support olates mechanical vibrations tending to be transmitted between the support and the resonator. The element has a thin active area with thicker ends for coupling and damping.

Abstract: A piezo-electric resonator comprises a rectangular piezo-electric bar moud interiorly of a frame formed of a multi-layered insulating material. The frame is impermeably enclosed by two cover members. The frame comprises a fastening arrangement including a suspension formed of thin conductors attached to the bar and arranged along one or more lines in the plane of one face of the bar. The thin suspension conductors are fixed to the face of the bar along nodal lines and are elbowed at least once on each side of the bar. The layered frame has a special construction.