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:
May. 11, 1976
Filed:
Jul. 12, 1974
Albert L Whetstone, Southport, CT (US);
Stanley C Phillips, Trumbull, CT (US);
Summagraphics Corporation, Fairfield, CT (US);
Abstract
A digitizing graphic system including a digitizing area, first and second coordinate arms extendable over the area, first and second magnetostrictive elements each positioned respectively in the first and second coordinate arms. A positionable device is movable with respect to the first and second arms on the area, each of the magnetostrictive elements having associated therewith a sending device and a receiving device. An energizing system is coupled to each of the sending devices for inducing magnetostrictively a strain wave longitudinally propagating along the magnetostrictive element to the respective receiving means. A digitizing system is coupled to each of the sending and receiving devices for digitizing the time duration of the strain wave propagation, the positionable device coupled to each of the coordinate arms for varying the propagating distance along each of the magnetostrictive elements in accordance with the position of the positionable device.