Automatic sextant
Patent 4707926 Issued on November 24, 1987. Estimated Expiration Date: 
November 24, 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.
November 24, 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 3194949 3360638 3482321 3752591 3854037 3912397 Electronic sextant Remote controlled, CRT digital display, LLLTV camera-sextant Automatic space sextant Navigational instrument InventorAssigneeApplicationNo. 06/590473 filed on 03/16/1984US Classes:33/267With telemetric meansExaminersPrimary: Haroian, Harry N.International ClassesG01C 1/00 (20060101)G01C 1/08 (20060101) AbstractA sextant for indicating the angular separation between two objects, including two members interconnected at a pivot point, means for adjusting the angle between the members to be indicative of the angular separation between the objects, the means for adjusting including coarse and fine adjustment means, and a pair of encoders for converting the respective positions of the coarse and fine adjustment means to signals which are together indicative of the angular separation. In other aspects, there is a single encoder having a track on the sextant arc and a sensor on the tangent arm; and an indicator tells the user when the sextant has been set to the prestored altitudes of reference celestial bodies. | |
