Quartz crystal vibrator with partial electrodes for harmonic suppression

A resonator comprising, a tuning fork made of a piezoelectric material having tines, each tine having partial electrodes on opposite sides thereof, electrical paths formed on the tuning fork electrically pairing the electrodes on the tines, each partial electrode having a partial length on the effective length of the corresponding tine less than the effective length of the corresponding tine, the effective length of each tine corresponding to the length of the portion thereof from the root to the outermost tip thereof, the ratio of the partial length of each electrode to the effective length of a corresponding tine being chosen at a value such that the relationship therebetween is effective to cancel in the corresponding tine the induced field due to deformation corresponding to second and higher harmonic oscillations, whereby each corresponding tine oscillates substantially only at a desired fundamental frequency.