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:
Oct. 09, 1990
Filed:
Feb. 21, 1989
Satoshi Komurasaki, Hyogo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A vibration detecting device attached to, for example, an internal combustion engine with a boss having a mounting surface for mounting the device which has the purpose of detecting knocking of the engine from the vibration thereof. The device has a housing containing a piezoelectric element and a weight which is adapted to impose inertial force on the piezoelectric element in response to vibrations from the engine whereby signals representing the vibrations are derived from the piezoelectric element. The housing has a effective contact surface which is smaller in area than the mounting surface, and the whole of which is in face contact with the mounting surface when mounted. The device is so arranged that the signals from the piezoelectric element represent the vibrations from the engine exactly as the are.