Portable three dimensional graphics tablet
Patent 4593470 Issued on June 10, 1986. Estimated Expiration Date: 
August 13, 2004. 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.
August 13, 2004. 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 References 2464585 3196544 InventorAssigneeApplicationNo. 06/640443 filed on 08/13/1984US Classes:33/1CC, Remote point locating33/1PT, Angular position transducer33/430Base attachedExaminersPrimary: 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 and a portable embodiment including a clamp or bracket are disclosed. | |
