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:
Aug. 09, 2011
Filed:
Dec. 06, 2006
Robert Alain Greubel, Lignières, CH;
Stephen Edward Methuen Forsey, Le Locle, CH;
Ludovic Philippe Roland Perez, Villers-le-Lac, FR;
Robert Alain Greubel, Lignières, CH;
Stephen Edward Methuen Forsey, Le Locle, CH;
Ludovic Philippe Roland Perez, Villers-le-Lac, FR;
Lange Uhren GmbH, Glashuette, DE;
Abstract
A timepiece includes a casing having a casing interior having a viewer's side provided with a viewing opening, a base side provided with a sound aperture, and an annular surface surrounding the sound aperture. A membrane extending over the sound aperture closes the base side of the casing interior, the membrane having a circumferential region in sealed connection with the annular surface. A tensioning device maintains the membrane at a desired tension in the radial direction. A vibration generator arranged in the casing interior produces a sound whose frequency can be adjusted by adjusting the tension of the membrane.