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:
May. 26, 1987
Filed:
Oct. 18, 1985
Lee T Todd, Jr, Lexington, KY (US);
Henry E Kloss, Cambridge, MA (US);
Cathodochromic Partners, Ltd., Louisville, KY (US);
Abstract
An apparatus for properly aligning a cathode-ray tube projection unit before a viewing screen includes a pair of ultrasonic rangefinders and a cooperating pair of light emitting diode (LED) reader units. One ultrasonic rangefinder and one reader unit are connected to each of two opposite sides of the projection unit. Each rangefinder is directed toward the viewing screen to sense the distance between the viewing screen and the side of the projection unit to which the rangefinder is connected. The cooperating LED reader unit then indicates whether that side is too close to, too far away from or a proper operating distance from the viewing screen. A method for properly positioning the projection unit includes the steps of: (1) sensing the respective distances between opposite sides of the projection unit and the viewing screen; (2) indicating whether the opposite sides are too close to, too far away or a proper operating distance from the viewing screen; and (3) adjusting the positioning of the unit as indicated.