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. 24, 1987
Filed:
May. 14, 1986
Wacom Co., Ltd., Saitama, JP;
Abstract
A position detecting apparatus has a plurality of magnetostrictive transmission medium elements which are arranged substantially in parallel with one another. A first coil and a second coil are wound around these elements such that signals are exchanged between these coils through the intermediary of the magnetostrictive transmission medium elements. The electric-mechanical coupling coefficient of the magnetostrictive transmission medium elements is locally changed by a magnetism from a position appointing magnetism generator so as to appoint a position on a plane provided by the magnetostrictive transmission medium elements, and the appointed position is detected through detection of a change in the timing of a signal caused by the local change in the above-mentioned coefficient. The position appointing magnetism generator is not connected to any portion of the stationary part of the apparatus. The apparatus is capable of detecting the appointed position at a high resolution, even when the position appointing magnetism generator is spaced apart vertically from the position detecting region. This apparatus is usable also for a moving object, with the position appointing magnetism generator affixed to the moving object.