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:
Nov. 08, 1983
Filed:
Apr. 02, 1982
David N Lambeth, Webster, NY (US);
Eastman Kodak Company, Rochester, NY (US);
Abstract
Position sensing mechanism, particularly for photographic apparatus controlled by a digital computer, includes a magnetostrictive position sensing device for supplying information on the positions of movable parts of the apparatus to the computer. The magnetostrictive position sensing device comprises a magnetostrictive element, such as a wire, a first electromagnetic transducer disposed with respect to the magnetostrictive element for transducing an acoustic pulse therein, and a second electromagnetic transducer disposed with respect to the magnetostrictive element for transducing the acoustic pulse, the first and second transducers being constructed for relative movement and a timer for measuring the propagation time of the acoustic pulse between the transducers. The measured time represents the relative position of the transducers along the magnetostrictive element.