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:
Apr. 14, 2009
Filed:
Aug. 02, 2007
Silvio Dalla Piazza, St-Imier, CH;
Silvio Dalla Piazza, St-Imier, CH;
ETA SA Manufacture Horlogère Suisse, Grenchen, CH;
Abstract
The tuning fork piezoelectric resonator () according to the invention comprises a base part () from which protrudes first and second parallel vibrating arms () carrying a set of excitation electrodes () to make them vibrate, the set of excitation electrodes being formed by conductive deposits and comprising central electrodes () on opposite main surfaces () and lateral electrodes () covering lateral surfaces () of each vibrating arm, the central electrodes of the first arm and the lateral electrodes of the second arm being connected to a first pole of an excitation source and the lateral electrodes of the first arm and the central electrodes of the second arm being connected to a second pole of the excitation source, wherein on each vibrating arm, the conductive deposits forming the central electrodes and lateral electrodes are made for the ones with an oxidizable metal and for the others with an unoxidizable metal or conversely.