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:
Jan. 30, 2007
Filed:
Dec. 19, 2005
Silvio Dalla Piazza, St-Imier, CH;
Bruno Studer, Riedholz, CH;
Silvio Dalla Piazza, St-Imier, CH;
Bruno Studer, Riedholz, CH;
Eta SA Manufacture Horlogere Suisse, Grenchen, CH;
Abstract
A transducer for measuring an angular velocity formed by a single piezoelectric tuning fork () that rotates at said angular velocity, including first () and second () vibrating legs extending from a base (), excitation electrodes () arranged on the excitation leg (), detection electrodes (), arranged on the detection leg (), characterized in that the detection leg includes at least one first groove () on the top face and at least one second groove () on the bottom face, and in that the detection electrodes include first and second detection electrodes arranged facing each other, the first () respectively the second detection electrode () being arranged on one lateral flank of the groove () respectively of the groove () such that the electrical field between the first and second detection electrodes is substantially rectilinear through the detection leg, and third and fourth detection electrodes arranged facing each other, the third () respectively the fourth detection electrode () being arranged on one lateral flank of the groove () respectively of the groove (), such that the electrical field between the third and fourth detection electrodes is substantially rectilinear through the detection leg.