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:
Feb. 06, 1996
Filed:
Oct. 06, 1993
Edgar L Field, Jr, Muskogee, OK (US);
Coburn Optical Industries, Inc., Tulsa, OK (US);
Abstract
A lens projector is provided for use with a lens blocking device having an LCD target display plane disposed beneath a work surface and a tower having an upper portion extending above the work surface with a eyepiece therethrough. The lens projector includes a bracket fixed to the tower proximate the eyepiece with a light source rigidly seated on the bracket above the work surface. A viewer mounted in the eyepiece is aligned on a sight line substantially normal to and centered on the work center of the LCD target display plane. An at least partially transmissive mirror intersects the sight line and is fixed to the viewer at an angle such that light emitted from a center of the light source is reflected along the sight line toward the work surface so as to project an image of a multi-focal segment or a lens marking onto the graphic display. A shield fixed to the bracket and extending between the light source and the tower protects the tower from heat dissipated by the light source. The projector light source is preferably a high intensity lamp connected to the electrical power source of the blocking device. A switch responsive to operation of a key on a keyboard of the blocking device controls the operation of the lamp and a timer automatically disconnects the lamp from the power source after a preselected period of operation.