Kel Corporation

Hiroshi Higashida

Ryuichi Tagashira

Takaki Endo

Kimiyasu Makino

An upstream side motherboard having an upstream side system slot and upstream side daughter board mounting slots to and a downstream side motherboard having a downstream side system slot and downstream side daughter board mounting slots are connected together by a bridging board The bridging board has bridge wires that electrically connect a plurality of wiring pins provided in the upstream side daughter board mounting slots and a plurality of wiring pins provided in the downstream side system slot when an upstream side connector is fitted into one the upstream side daughter board mounting slots and a downstream side connector is fitted into the downstream side system slot and IC switches and that carry out connection changing on prescribed wires out of the bridge wires.

Bridging board

The motherboard MB,of the present invention is a motherboard comprising a plurality of plug connectors,installed on the front face of the board,and a bus line for inter-connecting these plug connectors so as to allow inter-communication of daughter boards DB,-DB,connected to the plug connectors,. The motherboard is configured such that a termination board TB,having a terminating resistance to decrease reflection noise of the bus line is connected to the plug connector at the last slot S,of the bus line among the plug connectors,, . . . installed on the front face of the motherboard. Alternatively, the motherboard is configured such that the termination board is connected to the rear face of the last slot S

Motherboard with board having terminating resistance

Within a ferrule inserting hole 21 of a housing 2, a stop groove 23 is provided, while a taper portion 24 is formed as an insertion stopper. A ferrule 3 inserted and held in the housing 2 comprises a substantially cylindrical optical-fiber holding section 31, an optical-fiber crimping section 32 adapted to be crimped by means of a crimping tool for connecting electric wires or the like, and a latch 33 which expands within the stop groove 23 when positioned therein so as to prevent the ferrule 3 from dropping out. Accordingly, a crimping tool used for electric contacts in typical electric works can be used for crimping and attaching an optical fiber 4 to the ferrule 3. The ferrule 3 having the optical fiber 4 attached thereto can be firmly held by the housing 2 by simply inserting therein.

Growing community of inventors

Tokyo, Japan

Hiroshi Higashida