Angle-position transducer
Patent 4320293 Issued on March 16, 1982. Estimated Expiration Date: 
August 22, 2000. 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 22, 2000. 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 1985044 2796598 2879405 3258601 3649840 Positional sensor-operator system Optical position sensor Patent #: 4109147 InventorApplicationNo. 06/180335 filed on 08/22/1980US Classes:250/231.13, Shaft angle transducers250/214PRPhotosensitive rheostat typeExaminersPrimary: Nelms, David C.Attorney, Agent or FirmInternational ClassesG01D 5/347 (20060101)G01D 5/26 (20060101) AbstractAn angle-position transducer using light-interrogation employs an optical track and a beam of light. The light beam is formed into a narrow line-pattern. The line-pattern is directed to impinge on the optical track as the optical track moves angularly relative to the line-pattern. The optical track and line-pattern interact in a way that alters the line-pattern unambiguously. A target detector intercepts the altered radiation and applies a proportional signal to electronic means for digital display.Field of SearchGratings (moire fringes) | |
