Abstract: A load balancer includes: a license control unit that performs a process for collecting license information managed by plurality of servers; a connection management unit that manages a connection between the server to be allocated which is specified by the reply and the client, and notifying, when the connection is established, the license control unit of the identification information on the server to be allocated and the identification information on the license used for the connection; and an allocation processing unit that selects the servers that are the allocation candidates on the license of the determination request, and inquiring of the license control unit about the use state of the license by the selected server, and a process for specifying the server to be allocated from the allocation candidate servers, and notifying the connection management unit of the license included in the reply to the inquiry.

Abstract: A relay system stores destination information of both end systems for which communications are relayed, the sequence number of the one of the end systems is connected with a high quality transmission path, an ACK response number, a re-transmission count, etc. in a connection management table. Upon receiving a re-transmitted packet from the one of end systems, the relay system searches for the connection management table containing a matching sequence number, and increments the re-transmission count in the table by 1. If the re-transmission count has not reached a certain number, the relay system relays the re-transmitted packet as it is to the other end system.

Abstract: A relay system stores destination information of both end systems for which communications are relayed, the sequence number of the one of end systems connected with a high quality transmission path, an ACK response number, a re-transmission a re-transmitted packet from the one of end systems, the relay system searches for the connection management table containing a matching sequence number, and increments the re-transmission count in the table by 1. If the re-transmission count has not reached a certain number, the relay system relays the re-transmitted packet as it is to the other of end system.

Abstract: In a conveyor system for conveying a carrier member supporting a workpiece among working stations, provided are course changing units for changing the course through which the carrier member is conveyed, each of the course changing units being formed with a plurality of connecting portions, a pair of first conveying devices for conveying the carrier member between two of the course changing units, one and the other ends of each pair of first conveying devices being connected with ones of the connecting portions of different ones of the course changing units, respectively, each one of the pairs of first conveying devices conveying the carrier member in reverse direction with respect to each other, and second conveying devices for conveying the carrier member between one of the working stations and the course changing units.

Abstract: An course changing device is equipped with a conveyor system in which a carrier member carrying a workpiece is conveyed among a plurality of working stations. In the conveyor system, a plurality of conveying members for conveying the carrier member are connected by way of the course changing device. The course changing device is provided with a rotating member for being driven to rotate, a plurality of support members provided on the rotating member for holding the carrier member transported from one of the conveying members, a motor for driving the rotating member, and control circuit for actuating the motor to drive the rotating member in accordance with the station which the carrier member held by the support member is directed to.

Abstract: A detection system provided in a conveyor system in which carrier members are conveyed by conveying member between work stations, having an identification code provided on a disk member on each carrier member for indicating the working station to which the carrier member is to be transferred, detector for reading the identification code, a stopper for holding the carrier member at a predetermined position, and transmitting member provided with the carrier member for being relatively moved to the carrier member and transmitting the conveying force of the conveying member to the identifying member only when the carrier member is held at the predetermined position.