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:
Jul. 19, 1994
Filed:
Jan. 08, 1992
Jan Soderkvist, Taby, SE;
Bo Nilsson-Almqvist, Karlskoga, SE;
Tony Holm, Degerfors, SE;
Fredrik Borjesson, Stockholm, SE;
Abstract
A tuning fork-controlled gyro includes two legs and a base part, one end of each leg being connected with the base part and the legs being freely vibratable and provided with an electrode pattern comprising drive electrodes for generating a vibration in the legs of the tuning fork either in the plane of the tuning fork or out of the plane of the tuning fork and sensing electrodes for sensing vibrations occurring in the legs of the tuning fork in a plane perpendicular to the plane in which the vibration was generated. The legs and the base part are made of a single piezoelectric piece, the electrodes for driving and sensing are separated and are applied on one of the legs of the tuning fork and the sensing electrodes comprise first sensing electrodes for sensing vibrations out of the plane of the tuning fork or in the plane of the tuning fork respectively and second sensing electrodes for sensing vibrations in the plane of the tuning fork or out of the plane for regulating the in-plane or out-of-plane driving of the tuning fork.