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:
Jan. 27, 1976
Filed:
Apr. 24, 1973
Jerry B Holschlag, deceased, late of Greenwood, SC (US);
Lyle Wilcox, Clemson, SC (US);
Greenwood Mills, Greenwood, SC (US);
Abstract
A digital, abridged spectrophotometer with a detecting head defining a roughly spherical, reflective inner surface broken by a viewing port and a light source port with a number of filtered photodiodes mounted in the head for each receiving light from a sample or standard in the viewing port. A standard sheet of vitrolite is mounted on the housing for movement with a plunger, which trips a switch, to cover the viewing port, while a standard black sheet can be pivoted to cover the viewing port for the calibration which precedes each reading. A digital computer calculates the tristimulus values from the signals produced by the photodiodes and provides signals for a display of the color values.