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. 23, 1983
Filed:
Sep. 28, 1981
Alfred D Briere, Worcester, MA (US);
GTE Laboratories Incorporated, Waltham, MA (US);
Abstract
A furnace for drawing optical fiber includes a graphite element of generally cylindrical shape with a reduced central cross-sectional configuration having a flange at opposite ends thereof and having an axial hole therethrough including a central internal element chamber for receiving a glass preform, means for heating the reduced central cross-sectional configuration, and, hence, the central internal element chamber, so that an optical fiber can be drawn from the preform. The invention relates to providing a relationship between the internal diameter of the central internal element chamber and the inner diameter of the exhaust tubes so as to minimize gas turbulence within the central internal element chamber and thereby control the diameter of an optical fiber being drawn. The relationships can be such that the internal diameter of the central internal element chamber and the inner diameters of an input exhaust tube and an exit exhaust tube are substantially equal. The transitions from an enlarged hole to the central internal element chamber can be by way of tapers.