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:
Nov. 11, 2003
Filed:
Oct. 11, 2002
Toshiharu Miyata, Sendai, JP;
Kenichi Nakayama, Kawasaki, JP;
Mitutoyo Corporation, Kawasaki, JP;
Abstract
Each of first scale coils arranged at a cyclic interval &lgr; /2 of a magnetic encoder is connected by each of connecting wires to a corresponding one of second scale coils arranged at a different cyclic interval &lgr; /2 thereof. Each of the connecting wires includes two parallel conductors placed in such a way as to be close to each other. The connecting wires are set so that at any position on the scale, the length of the connecting wire has an equal value. Thus, the signal levels of received signals, which are attenuated by electric currents flowing through the two conductors in opposite directions, can be controlled in such a manner as to be equal to each other. Consequently, the influence of the position of a detection coil on the scale, which is exerted on the signal level of the received signal, is reduced.