Abstract: A submarine power feeding branching device comprises a constant current-constant current converter which isolates an input side for a trunk submarine cable from an output side for a branch submarine cable. The converter receives a first constant current and produces a second constant current by using the first constant current. The second constant current is supplied to the output side while the first constant current is returned to the input side. Because the input side and the output side are isolated, it is easy to add/remove the device to/from a submarine power feeding system. Intensity of the second constant current can be controlled by controlling duty ratios of switches included in the converter. Thus, it is possible that the intensity of the second constant current is equal to that of the first constant current. Therefore, a submarine repeater can be provided along either the trunk cable or the branch cable.

Abstract: A door for a computer case is provided which can be moved to a blocking position for blocking access to bays and/or drives of the case. The door can be attached to the case by a slide connection for sliding it along the front of the case between its blocking and accessing positions. In the preferred form, the case is a vertical tower type of case and the door is preloaded on track guides so that when it is raised such as to the blocking position it will not fall back to the accessing position under the influence of its own weight. A gear drive can be provided between the door and housing to provide for smooth manual sliding of the door to readily allow the door to be pushed to overcome the frictional resistance provided by the preload without hang ups in the track guides.

Abstract: Rapid restoration of a telecommunication path between network nodes after an interrupting network link failure utilizes a distributed system of selective flooding for dynamically reconfiguring the internodal path in a manner which will ensure the most economical use of intermediate links. A help message transmitted from one of the terminating nodes to each contiguous neighboring node requests use of the uncommitted bandwidth of each respective link. This wave of messages is propagated selectively, along paths having maximum available bandwidth and least number of links, through the network by each successive receiving node until the help message reaches the other terminating node of the failed link. An acknowledgement message returned to the initial terminating node via propagation links offering the maximum bandwidth establishes a reconfigured path providing the greatest bandwidth recovery.