Holder for crystal resonators

Claim 1

A RESONATOR DEVICE COMPRISING A DISC-SHAPED CRYSTAL, A HOUSING OF A NONCONDUCTIVE MATERIAL DEFINING A DISCSHAPED CENTRAL CAVITY AND A PAIR OF DISC-SHAPED VIBRATION CAVITIES, EACH VIBRATION CAVITY BEING DISPOSED ON A DIFFERENT SIDE OF SAID CENTRAL CAVITY, THE CENTERS OF THE CAVITIES BEING SUBSTANTIALLY ALIGNED ON A STRAIGHT LINE, THE CROSS-SECTIONAL AREA OF EACH VIBRATION CAVITY BEING SMALLER THAN THE CROSSSECTIONAL AREA OF SAID CRYSTAL; CONDUCTIVE LAYERS OF MATERIAL DEPOSITED ON THE OPPOSITE SURFACES OF SAID CENTRAL CAVITY ADJACENT SAID VIBRATION CAVITIES, THE SPACING BETWEEN SAID LAYERS BEING LESS THAN THE THICKNESS OF SAID DISC-SHAPED CRYSTAL, AND THE CROSS-SECTIONAL AREA OF SAID CENTRAL CAVITY BEING AT LEAST EQUAL TO THE CROSS-SECTIONAL AREA OF SAID CRYSTAL FOR SUPPORTING SAID CRYSTAL UNDER PRESSURE BETWEEN THE CONDUCTIVE LAYERS THEREOF; AND CONDUCTIVE LEADS EXTENDING THROUGH SAID HOUSING COUPLED TO SAID LAYERS OF MATERIAL TO BE CONDUCTIVELY COUPLED WITH SAID CRYSTAL.