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:
Mar. 23, 1982
Filed:
Jun. 30, 1980
Ernest E Wheeler, San Diego, CA (US);
Other;
Abstract
A simple, light-weight air-cooled filter arrangement for a narrow band pass filtered light fixture. In lighting fixtures such as infrared energy sources or stage lighting, it is necessary to filter a conventional broad spectrum energy source so that only energy in the desired region is transmitted. These filters which absorb energy in bands other than that being transmitted tend to become very hot. A light fixture is provided having a plurality of spaced filters near a light output end. Each filter has one or more openings offset from the openings in other filters so that no single straight path passes through openings in all filters. A light source is provided adjacent to the filter pack, with a fan positioned on the side of the source opposite the filter pack, with openings in the fixture housing beyond the fan. In operation, the filter pack absorbs energy in all spectral regions other than the band which the pack was designed to pass. The fan draws air in through the filter pack, past the light source and ejects it out through the openings. This fixture is simple, light-weight and cool in operation.