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:
Oct. 03, 1989
Filed:
Jul. 22, 1988
Toru Ueno, Hadano, JP;
Youichi Fukuoka, Hadano, JP;
Seiichi Baba, Kamakura, JP;
Kaoru Miyoshi, Yokohama, JP;
Kazuto Kinoshita, Tsukuba, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A method for measuring the size of a wire rod comprises the steps of turning a laser beam from a laser beam source into a parallel beam used for scanning, disposing a first wire rod having an unknown size and a second wire rod having an already known size larger than the diameter of the spot of the laser beam adjacent to each other in a direction of scanning with the laser beam, receiving the laser beam traversed the first and second wire rods thereby generating a corresponding electrical output signal, and calculating the size of the first wire rod on the basis of the electrical output signal.