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:
Sep. 27, 1983
Filed:
Jun. 18, 1981
Jean-Pierre Hazan, Sucy-en-Brie, FR;
Michel Steers, Chennevieres-sur-Marne, FR;
Jean Caron, Evreux, FR;
U.S. Philips Corporation, New York, NY (US);
Abstract
A method of detecting the release of dye from laundry in a washing machine despite the presence of dirt in the washing water. During a washing operation, a radiation flux including an infrared flux part (.phi..sub.I) and a visible flux part (.phi..sub.V) is passed through the wash water in which it is subject to absorption and diffusion. The flux parts .phi..sub.I and .phi..sub.V are compared during the entire washing program and the ratio of .phi..sub.V and .phi..sub.I is determined. The release of dye is signalled by a substantial variation of said ratio. The signal may be used for actuating an alarm device and/or controlling the washing program.