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. 27, 1981
Filed:
Mar. 12, 1980
Toshihiko Kobayashi, Mitaka, JP;
Tetsusaburo Kamibayashi, Niza, JP;
Abstract
A co-ordinate plate for a co-ordinate reader, which utilizes delays of oscillation waves in a magnetostrictive material. The co-ordinate plate is composed of two sheets of magnetostrictive material, which have a common co-ordinate plane and an acoustically insulating sheet therebetween, and in which propagation characteristics of the magnetostrictive oscillation waves are approximate to each other in a direction of a first line formed, on the co-ordinate plane, by the loci of many points having the same one of the two components of their co-ordinates and in a direction of a second line formed, on the co-ordinate plane, by the loci of many points having the other same component of the two components of their coordinates. Two exciting coils are provided for producing magnetostrictive oscillation in the thin plate of magnetostructive material in the directions of the first and second lines. Flux keepers are further provided for shielding magnetix fluxes emanating from the exciting coils.