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:
May. 15, 1984
Filed:
Apr. 02, 1982
Haruyoshi Kondo, Aichi, JP;
Masaharu Takeuchi, Aichi, JP;
Kabushiki Kaisha Toyota Chuo Kenkyusho, Aichi, JP;
Abstract
An improvement in an engine vibration sensor of the type including a vibrator set to resonate at a specific frequency of vibration of the engine to which it is attached, for example the engine knocking vibration frequency, wherein the vibration of the vibrator is converted to an electric signal representing the specific engine vibration. The improvement consists of forming the vibrator from a magnetic material and providing a magnetic field generator for applying a magnetic field of controlled intensity to the vibrator, whereby the resonant frequency of the vibrator can be adjusted by varying the intensity of the magnetic field.