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:
Mar. 04, 2008
Filed:
Dec. 19, 2005
Gérald Maurice Matthey, Ballaigues, CH;
Gérald Maurice Matthey, Ballaigues, CH;
Eta Sa Manufacture Horlogere Suisse, Grenchen, CH;
Abstract
The vibrating device () is mounted in a portable object, such as a wristwatch, to act in particular as a silent alarm. The device includes a moving mass () formed in part by a magnetic structure connected to a fixed structure () via a spring element (), and a coil () connected to the fixed structure without any mechanical contact with the moving mass. The coil is electro-magnetically coupled to the moving mass to enable it to oscillate in at least one direction of oscillation (X) when it is being powered by alternating electrical signals at a determined frequency. A fixed part of the vibrating device includes a part () forming part of the spring element, which is mounted on the fixed structure. This part includes a longitudinal aperture () in the direction of oscillation combined with a surface of the fixed structure to define guide means in which a projecting element () of the moving mass is placed. This longitudinal aperture is dimensioned so as to allow the moving mass to oscillate freely in a normal operating mode of the vibrating device () at least up to a determined maximum amplitude value. However, the aperture limits the movement amplitude of the moving mass in a determined manner in all directions, to protect the vibrating device from mechanical shocks.