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. 03, 2011
Filed:
Dec. 28, 1998
Toshihide Hamaguchi, Higashiosaka, JP;
Hirokazu Genno, Hirakata, JP;
Toshihide Hamaguchi, Higashiosaka, JP;
Hirokazu Genno, Hirakata, JP;
Kyocera Corporation, Kyoto, JP;
Abstract
In a notifying device comprising a notifying unithaving incorporated therein a vibrator to be resonated by a drive signal fed thereto, and a signal preparing circuitfor feeding the drive signal to the notifying unit, the signal preparing circuitprepares a drive signal Dv varying in frequency within a predetermined range including the resonance frequency of the vibrator of the unitand feeds the signal to the notifying unit. The variation of frequency of the drive signal is determined in correspond relation with a variation in the resonance frequency of the vibrator due to tolerances for specifications which govern the resonance frequency. The drive signal has an alternating waveform of rectangular waves or sine waves, and the frequency thereof varies periodically from 1.37 to 2.98 Hz. The notifying device achieves a satisfactory notifying effect despite the variation of the resonance frequency of the vibrator.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile