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:
Jun. 20, 1995
Filed:
Oct. 22, 1993
Frank S Nickel, Perry, OK (US);
David R Payne, Perry, OK (US);
The Charles Machine Works, Inc., Perry, OK (US);
Abstract
A device utilized for accurately measuring inclination angles independent of roll position using optical methods, whereby an amplitude of reflected (or refracted) light rays from a surface of a gravity-leveled liquid are detected by a photo-detector. The amplitude of the detected light beam is a function of the beam's angle of incidence to the liquid, which is proportional to the angle of the sensor's inclination. The incline sensor includes a cylindrical symmetric vessel which is partially filled with a liquid, an axially symmetric light emitting diode (LED) and a photo-detector. The fluid is chosen to have indices of refraction of at least 1.33, or reflectivity >0.60 so that measurable refraction (or reflection) angles can be realized for the geometry of the sensor. The liquid is also chosen to have freezing and boiling points acceptable for use in the desired applications.