Thickness shear type piezoelectric vibrator with integral mounting

Claim 1

A thickness shear type quartz crystal vibrator comprising a thin quartz plate of uniform thickness cut from the Y-plate rotated through an angle of 30° to 40° about the X-axis and shaped by etching to form a rectangular vibrating portion elongated along the X-axis and of uniform thickness throughout its width and length, and integral rectangular supporting portions extending respectively from opposite ends of said rectangular vibrating portion and of uniform width throughout their length, said vibrating portion and integral supporting portions being of the same uniform thickness, and the width of said supporting portions of said quartz plate being between one quarter and three quarters the width of said vibrating portion, and electrodes of conducting material having elongated rectangular active portions on the obverse and reverse surfaces of the vibrating portion of said plate respectively, the electrode on the obverse surface of said plate having an integral lead portion extending along the obverse surface of one only of said supporting portions and the electrode on the reverse surface of said plate having an integral lead portion extending along the reverse surface of the other body of said supporting portions, whereby an electric field is applied by said electrodes only to said vibrating portion of said plate and is not applied at all to said supporting portions.