The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 07, 1995
Filed:
Oct. 02, 1990
Kokichi Terajima, Tokyo, JP;
Akai Electric Co., Ltd., Tokyo, JP;
Abstract
A vibratory gyroscope comprises, with respect to an XYZ coordinate system, a tuning fork having two arm members extending from a base member in the direction of the Z-axis, a support member extending from the base member in the direction of the Z-axis, and a pickup member which senses a Coriolis force acting on the two arm members when they are caused to vibrate. The pickup member includes a layer of piezoelectric material polarized in the direction of the Z-axis and at least one pair of electrodes disposed on surfaces of the support member which are in parallel to the Z-axis. At least one of the electrodes is positioned to one side of a center line on its respective surface, the center line being parallel to the Z-axis. In one embodiment, the pickup member itself constitutes the support member of the tuning fork. In another embodiment, the pickup member is a separate unit which is affixed to a surface of the support member of the tuning fork.