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:
Jan. 19, 1993
Filed:
Apr. 03, 1991
Shigeo Take, Yokosuka, JP;
Oppama Kogyo Kabushiki Kaisha, Kanagawa, JP;
Abstract
The revolutions of a diesel engine are counted by providing vibration detector converting the vibration propagating through the fuel injection pipe into an electric signal; an amplitude sorter for receiving the electric output signal of the detector and providing an output signal when the amplitude becomes larger than a predetermined level; a waveform shaper for receiving the output signal of the sorter and converting respective pulse groups to single pulse outputs. The respective pulses from the sharper are judged to determine whether signal pulse in the present period is within a predetermined allowable range or not, and thereby determining whether respective pulses are 'normal' pulses or not. The number of normal pulses per unit time are counted and displayed on a monitor.