Tuning fork shaped crystal oscillator and method of...

Details Tuning fork shaped crystal oscillator and method of... Tuning fork shaped crystal oscillator and method of...

2007-01-23

2007-01-23

Kinkead, Arnold (Department: 2817)

Oscillators

Electromechanical resonator

Vibrating reed or string type

C073S504160, C310S329000, C310S370000

Reexamination Certificate

active

10946889

ABSTRACT:
The present invention provides a tuning fork shaped oscillator, an angular velocity sensor element, and an angular velocity sensor with improved breaking strength with respect to CI and drive power, CI stability, and frequency stability. The present invention relates to a tuning fork shaped crystal oscillator of a configuration wherein two tuning fork shaped crystal elements that have been formed by wet etching during the process of forming the external shape of a tuning fork, in such a manner that the longitudinal direction of the tuning fork is aligned on the Y-axis of the crystalline axes (XYZ) and also the lateral direction thereof is aligned on the X-axis, are bonded together with the ±X-axis directions thereof oriented in opposite directions; and the right side surface of each of the two tuning fork shaped crystal elements is the +X face of the crystal when the two tuning fork shaped crystal elements are viewed in an upright attitude.

REFERENCES:
patent: 6474162 (2002-11-01), Voss et al.
patent: 6532817 (2003-03-01), Yukawa et al.
patent: 0 955 519 (1999-11-01), None
patent: 2002-188922 (2002-07-01), None
European Search Report dated Jul. 5, 2005.

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