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. 11, 2011
Filed:
Sep. 05, 2007
Kojiro Kato, Hamamatsu, JP;
Kojiro Kato, Hamamatsu, JP;
Yamaha Corporation, Hamamatsu-shi, JP;
Abstract
A slide operating device (e.g., fader device of a mixer) has a moving blockwhich is slidable along a moving guideand a secondary moving guide. The moving guideis composed of a non-magnetic stainless shankand a scale portionformed by magnetizing a permanent magnetic member to have magnetic poles (markings). The moving blockis provided with a magnetic sensoropposed to the scale portion. The magnetic sensorsenses magnetic poles provided on the scale portion. Mounting hardwareA,B are provided as stoppers which stop a leverof an operating knob. Areas outside a range sandwiched between the stoppers where the magnetic sensoris allowed to travel are dead zonesA,B which do not have magnetic poles. Even if the magnetic sensortravels beyond the points where the operating knobis expected to stop due to an excessive force exerted on the operating knob, the slide operating device can prevent from keeping abnormal count which could be caused by sensing of magnetic poles by the magnetic sensor