Three dimensional graphics tablet
Patent 4477973 Issued on October 23, 1984. Estimated Expiration Date: 
July 14, 2002. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
July 14, 2002. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesInventorAssigneeApplicationNo. 06/397976 filed on 07/14/1982US Classes:33/1CC, Remote point locating33/1M, X-Y motion33/1PT, Angular position transducer340/678Of geometrical gaugeExaminersPrimary: Martin, William D. Jr.Attorney, Agent or FirmInternational ClassG01B 7/004 (20060101)AbstractA three dimensional graphics tablet for determining the three dimensional coordinates of points on an object placed on a supporting plane. The apparatus includes an articulated arm having at least two link elements connecting a contacting tip element to the support for rotational movement about a plurality of mutually angulated axes. By means of the arm articulation, the contacting tip element can be moved to arbitrary locations within a defined volume. Potentiometers are provided for measuring each of the angles of rotation about the mutually angulated axes. These potentiometers generate signals which collectively determine the coordinates of the location of the tip element. Embodiments are disclosed having three and four degrees of freedom.Other References
| |
