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:
Jul. 13, 1993
Filed:
Apr. 26, 1991
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
An acceleration detector comprising a housing adapted to be rigidly secured to an object of which acceleration is to be detected and a transducer assembly disposed within the housing for detecting the acceleration on the housing. The transducer assembly comprises a disc-shaped diaphragm having a circular central region flexible in response to the acceleration on the housing and a plurality of radial arms integrally extending at equal intervals from the central region and supported by the housing at outer ends. A disc-shaped piezoelectric element is attached to the central region of the diaphragm for sensing flexture of the central region and generating a signal representative of the acceleration on the housing. The central region has a diameter not smaller than that of the piezoelectric element. The radial arms may have a total circumferential width dimension effective to improve temperature vs. resonance frequency characteristics of the transducer assembly. The housing may comprise a base and a cover securely connected together, and a continuous ring-shaped member connected to outer ends of the radial arms is firmly clamped in an air-tight manner between the base and the cover.