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. 14, 1993
Filed:
Jun. 26, 1992
Applicant:
Inventor:
Ryuji Usui, Tokyo, JP;
Assignee:
Japan Aviation Electronics Industry Limited, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B / ; G01B / ; B65H / ;
U.S. Cl.
CPC ...
385134 ; 385136 ; 385137 ; 385147 ; 356350 ; 242118 ; 242170 ;
Abstract
A cylindrical bobbin having flanges at both ends thereof is formed as a unitary structure, using a material of thermal conductivity nearly equal to or lower than that of an optical fiber coil, and the optical fiber coil is wound on a housing portion defined between the flanges. An annular member is mounted on the bobbin to cover the housing portion on the outside of the optical fiber coil, forming an annular case for housing the optical fiber coil, together with the bobbin. The annular member is also made of a material which has a thermal conductivity nearly equal to or lower than that of the optical fiber coil.