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:
Apr. 27, 2004
Filed:
Jun. 26, 2002
Hiroyasu Numaya, Niigata, JP;
Nippon Seiki Co., Ltd., Niigata, JP;
Abstract
The invention provides a movable magnet type instrument able to reduce cost and an instrument device using this movable magnet type instrument. The movable magnet type instrument M has a rotor magnet magnetized such that adjacent magnetic poles are poles different from each other; a pair of coils arranged around this rotor magnet and having winding central axes C , C crossing each other without being perpendicular to each other; control means for processing an input signal based on a measured amount and supplying a driving signal mutually having a different electrical angle to each of the coils and rotating and operating the rotor magnet; and a pointer for rotating the rotor magnet as a driving source; wherein, when the number of magnetic poles of the rotor magnet is set to n and an acute angle formed by crossing the winding central axes C , C is set to r, the acute angle r is set to an angle calculated by 360/2n (n is a multiple of 2 equal to or greater than 4).