Tuning fork

Details Tuning fork Tuning fork

1981-11-20

1985-02-05

Wong, Peter S.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310370, H01L 4108

Patent

active

044980256

ABSTRACT:
A tuning fork utilizing elastic coupling between the flexural mode and the torsional mode in which the frequency of the flexural mode is adjusted by adding or reducing masses deposited near the center of the arms in the lengthwise direction and the frequency of the torsional mode is adjusted by adding or reducing masses deposited on the other portions such as the tops of the arms. The positions near the center of the arms in the lengthwise direction are suitably selected so that adding or reducing the masses thereto or therefrom changes only the frequency of the flexural mode changes only and the frequency of the torsional mode is scarcely changed.

REFERENCES:
patent: 3697766 (1972-10-01), Ganter et al.
patent: 4076987 (1978-02-01), Zumsteg
patent: 4320320 (1982-03-01), Momosaki et al.
patent: 4377765 (1983-03-01), Kogure et al.
Tomikawa et al., "Second-Mode Tuning Forks for High Frequencies: Finite Element Analysis and Experiments", IEEE Transactions on Sonics and Ultrasonics, vol. SU-14 27, No. 5, (Sep. 1980), pp. 253-257.

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