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:
Jan. 31, 1989
Filed:
Oct. 13, 1987
Masaaki Mizuguchi, Shizuoka, JP;
Hirohisa Kuroyanagi, Shizuoka, JP;
Yamaha Corporation, Hamamatsu, JP;
Abstract
There is provided a force sensitive device comprising a first conductive layer, a second conductive layer resiliently deformable to come into contact with the first conductive layer, a certain level of voltage being applied across the first and second conductive layers, a plurality of spacing members intervening between the first conductive layer and the second conductive layer and formed of an insulating material, and a resilient top layer of an insulating material overlaid on the second conductive layer and operative to cause the second conductive layer to come into contact with the first conductive layer under a force acting on a surface portion thereof, wherein the contact portion varies in area depending upon a position of the surface portion where the force acts so that the force sensitive device produces the signal having a voltage level which varies depending upon the position where the force acts.