Piezoelectric element for an automatic frequency control circuit, oscillating mechanical system and device comprising the same, and method for manufacturing the piezoelectric element

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 10983479
APP PUB NO 20190079453A1
SERIAL NO

16104212

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Abstract

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A piezoelectric element for an automatic frequency control circuit, the element including: a balance spring formed of a strip of piezoelectric material; at least a first electrode, configured to be connected to the circuit and being disposed on all or part of one side of the strip; at least a second electrode configured to be connected to the circuit and being disposed on all or part of another one side of the strip distinct from the one side on which the first electrode is disposed, the piezoelectric material being a piezoelectric crystal or a piezoelectric ceramic; and at least two discontinuous layers of an insulating material, each discontinuous layer being disposed on at least one side of the strip and separating the first electrode from the second electrode, the layers of insulating material being distributed on predetermined portions of the balance spring substantially forming arcs in a predetermined angular periodicity.

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Patent Owner(s)

Patent OwnerAddress
THE SWATCH GROUP RESEARCH AND DEVELOPMENT LTDSWISS MA LIN MARIN-EPAGNIER NEUCHATEL

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Dalla, Piazza Silvio St-Imier, CH 26 224
Gueissaz, Francois Cormondreche, CH 21 317
Haemmerli, Alexandre Neuchatel, CH 18 15
Schnyder, Bernhard Leuzigen, CH 2 2
Tombez, Lionel Bevaix, CH 57 104

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