Eta Sa Fabriques D'ebauches

Kurt Schulthess

Thomas L&uuml;thi

Encapsulated piezoelectric resonator including on the one hand a central plate ( ) made of a piezoelectric material cut to form a frame ( ) and a central resonant element ( ) connected to said frame ( ), the top and bottom faces having a metal coating, on the other hand bottom ( ) and top ( ) covers, each being formed by a spacing frame ( ) made of metal or a metal alloy and a closing plate ( ), characterised in that at least one of the elements ( ) forming the covers ( ) is electrically connected to the frame ( ) of the central plate ( ) and has an extension ( ) bent into a Z shape to bring its distal portion ( ) in line with a covering plate ( ) and to form electrical and mechanical connection means situated in a same plane.

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Balm b. Günsberg, Switzerland

Kurt Schulthess