Holder device for a vibrator

Claim 1

A piezo-electric vibrator operating in an X-Y flexural vibration mode, said vibrator comprising: a. a piezo-electric crystal plate having two opposite major surfaces, and edges connecting said surfaces, two of said edges constituting opposite front and rear surfaces; b. two first electrodes respectively superposed on said major surfaces, 1. each first electrode having a recess intersected by a first nodal axis of vibration of said crystal plate, 2. said axis being perpendicular to said major surfaces and spaced from the edges of said crystal plate; c. two second electrodes respectively superimposed on said front and rear surfaces, 1. each second electrode having a projection perpendicular to the associated front or rear surface and extending along a respective one of said major surfaces, 2. said projections being received in said recesses respectively, 3. said projections projecting from the associated second electrodes in opposite directions and being intersected by said nodal axis, 4. said crystal plate and said projections being formed with respective passageways aligned along said nodal axis, 5. said crystal plate having a second nodal axis perpendicular to said major surfaces and spaced from said edges and from said first axis, said second axis intersecting said first electrodes, the first electrodes and said crystal plate being formed with respective passageways aligned along said second axis; d. a first lead passing through the passageways of said crystal plate and of said projections aligned along said first nodal axis and being electrically connected to said intersected projections; and e. a second lead passing through the passageways of said crystal plate and of said first electrodes aligned along said second axis, 1. each of said leads being mechanically fastened to said crystal plate in a passageway of the crystal plate and extending outwardly away from said major surfaces.