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:
Apr. 01, 1997
Filed:
Nov. 03, 1995
Takashi Igarashi, Akishima, JP;
Shuichi Sato, Ome, JP;
Hoya Corporation, Tokyo, JP;
Hoya Information System Corporation, Tokyo, JP;
Abstract
An apparatus for measuring the shape of a frame of spectacles is provided wherein the shape of a frame is measured with a measuring element which is held in contact with a groove in a rim of the frame while being moved along the groove. To accurately position the measuring element with respect to the groove of the frame before the start of measurement, positioning means is provided which moves the measuring element horizontally toward the frame, presses the measuring element against the frame with a biasing force, and which positions the measuring element at a measurement position. Further, to permit smooth vertical movement of the measuring element and to achieve accurate shape measurement, thrust means is provided which pushes the lower end face of a measuring element supporting shaft upward at a location displaced from the axis of the shaft. To accurately position the measuring element for accurate shape measurement, the measuring element supporting shaft has a projection located between the measuring element and intervening means. Further, to reliably hold the frame with ease and to prevent deformation of the same, a turning mechanism is provided for turning at least one of two holding members parallel to the plane of the frame rim, the holding members contacting the upper and lower portions, respectively, of the frame to thereby hold the frame.