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. 27, 1993
Filed:
Dec. 02, 1991
Gregory R Fedor, Bay Village, OH (US);
Douglas M Grossman, Fairview Park, OH (US);
Q-Panel Company, Cleveland, OH (US);
Abstract
A Weathering apparatus having a light source which irradiates onto specimens located in a specimen supporting wall which is located on a side of a test chamber. The output of the light source is controlled by independently adjustable control channels. Each of the control channels include a light source detector inserted into the test chamber, control circuitry, and ballasts connected to the light sources. The light sources are controlled by the control channels to deliver an output equivalent to a desired set-point. In order to disperse light in an even manner to the specimens, a barrier is provided which interferes in a predetermined pattern with the passage of light produced by the light sources. The apparatus includes a calibrating device which automatically transfers an irradiance signal from a reference detector selectively positioned immediately adjacent the light source detector. The calibration signal is sent to the controller where the re-calibration of a selected control channel is accomplished.