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:
Aug. 30, 2005
Filed:
Feb. 26, 2004
Koichi Hashimoto, Kusatsu, JP;
Hiroyuki Kosokabe, Yamagata, JP;
Koichi Hashimoto, Kusatsu, JP;
Hiroyuki Kosokabe, Yamagata, JP;
Nippon Electric Glass Co., Ltd., Otsu, JP;
Abstract
An infra-red absorption glass for a reed switch is suitable for encasement of a reed switch using magnetic wire members made of Fe—Ni based alloy (52 alloy). In the infra-red absorption glass, an infra-red transmittance at a wavelength of 1050 nm is not greater than 10% for a thickness of 0.5 mm and the content of Cl in the glass is not greater than 150 ppm. In the glass, a coefficient of thermal expansion in a temperature range between 30 and 380° C. is preferably 85-100×10/° C. In addition, the infra-red absorption glass preferably has a composition consisting essentially of, by weight percent, 60-75% of SiO, 1-10% of AlO, 0-10% of BO, 3.5-10% of RO (R being one or more selected from Ca, Mg, Ba, Sr, and Zn), 0.5-5% of LiO, 8-17% of NaO+KO, 2-10% of FeO.