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. 30, 1990
Filed:
Apr. 11, 1989
Satoshi Komurasaki, Himeji, JP;
Atsushi Ueda, Himeji, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
An acceleration detector of the present invention which may be secured by a single screw to an internal combustion engine comprises a housing and a piezoelectric acceleration transducer assembly mounted in the housing by a stop nut. The detector comprises a recess for being engaged by a projection of the engine for positioning and preventing an undesirable rotation of the housing upon turning of the stop nut. The acceleration detector may comprise a low-friction washer between the nut and the terminal of the transducer assembly for preventing an undesirable rotation of the terminal upon turning of the nut. Alternatively, one of the terminals of the acceleration transducer assembly is made sufficiently rigid to permit the use of a tool on it to firmly hold it. An electrically insulating stopper projection may be provided between the terminals to prevent an undesirable rotation of the terminals. In order to facilitate the precise assembly of the acceleration transducer assembly, projection tabs are provided on the terminal for engagement with the piezoelectric element. Also, the contact surface of the stop nut may contact substantially the entire surface of the weight.