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. 22, 1993
Filed:
Nov. 07, 1991
David H Youden, Nelson, NH (US);
Mark C Gerchman, Keene, NH (US);
Daniel L Denery, Keene, NH (US);
Jyrkl T Liedes, Leominster, MA (US);
The University of Rochester, Rochester, NY (US);
Abstract
Apparatus is described for grinding glass to form optical elements, especially prisms. The apparatus has an improved mounting for grinding wheels which are used for different grinding purposes, specifically roughing, finishing and polishing. The finishing wheel is usually an expensive, diamond-abrasive wheel which is trued to provide finishing grinding operations with high accuracy. The finishing wheel, which can be used for the critical final grinding of the workpiece, is semi-permanently mounted on the grinding machine spindle in a manner which allows the less critical roughing (semi-finishing) and polishing wheels to be temporarily mounted in front of the finishing wheel in interlocked, stacked relationship therewith without disturbing the truth of rotation of the finishing wheel. When the finishing wheel is used alone, a plug is inserted in a socket, which receives a shank extending from the other wheels, so as to prevent dirt from entering the socket. The apparatus enables the required accuracy of rotation of the finishing wheel to be maintained while significantly reducing the time and cost of grinding operations by avoiding the need for repeatedly remounting and truing the finishing wheel.