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. 30, 1985
Filed:
Jun. 23, 1980
Applicant:
Inventor:
Albert L Whetstone, Stratford, CT (US);
Assignee:
Summagraphics Corporation, Fairfield, CT (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01B / ; G08C / ;
U.S. Cl.
CPC ...
324208 ; 178 18 ; 33 / ;
Abstract
An improved position determination device utilizes an energized movable pointer which is inductively coupled to a grid of spaced parallel electrical conductors for each coordinate direction. The termini of the spaced conductors of each grid are traversed by a respective magnetostrictive element. Strain waves are propagated from the region where each magnetostrictive element is traversed by the respective energized conductors to a sensor and the time between arrival of the strain waves and the arrival of reference strain waves from reference points on the magnetostrictive elements is computed to determine the coordinates of the pointer.