Kel Corporation

Toshihiro Nonaka

Hideyuki Hanzawa

Etsuro Doi

An inner, optical fiber core clamping ferrule has an optical fiber clamping portion for receipt in an outer ferrule and defining an axially extending through-passageway, an axial slit extending through the clamping portion divides the passageway into two opposed groove portions receiving a prepared end of an optical fiber extending along the through-passageway. The inner ferrule is force-fitted in the outer ferrule to extend co-axially therewith, with wall portions thereof maintaining the opposed walls of the spaced apart slit in open condition so that opposed walls of the groove portions are pressed into gripping engagement with the optical fiber. The opposed walls of the slit diverge as they extend radially outwardly away from the groove portions. The inner ferrule may be split for the entire length of the through passageway forming two halve hinged together at one end or have open slits formed in an otherwise imperforate tubular wall.

Optical fiber ferrule assemblies

A multi-way, electro-optic connector comprises an optical fiber plug connector 1 and an electro-optic receptacle connector 100. Identical cover members 2 and 3, of the plug connector 1 define divergently curving optical fiber guiding channels 23 of at least a minimum curvature obviating transmission losses. Ferrule assemblies 5, each include an outer ferrule 25 receiving a reinforcing tube 26 and an inner ferrule 27 having slits 27a in optical fiber receiving ends and force-fitted into the reinforcing tube 26 with the core 24 received in a bore 31 of the outer ferrule as a sliding fit. Clamping collars, 9 and 10 are deformed to clamp cable reinforcing fibers 8 by assembly of the cover members 2,3. A one-piece, ganged sleeve member 130 and a retaining member 150 retain transducers 140 with leads trapped in grooves 138a,b and 139 for subsequent insertion in a main receptacle housing 110.

Growing community of inventors

Tama, Japan

Toshihiro Nonaka