Abstract: An intermittent tape core wire (140) of an optical fiber cable is assembled into a cable core so that in a k core wire, an l core wire, and an m core wire composed of a multi-core optical fibers continuously adjacent in the width direction of the intermittent tape core wire (140), a difference ? between a core wire twisting direction D2km of the k core wire at a bonding portion (142) connecting the k core wire and the l core wire and a core wire twisting direction D2kl of the k core wire at a bonding portion (142) connecting the k core wire and the m core wire is different from when manufactured.

Abstract: An optical fiber cable 100 includes at least one optical fiber core 140 and a sheath containing the optical fiber core. The optical fiber core 140 includes optical fibers 130. A total length of the optical fiber core 140 is longer than that of the sheath 160. The optical fiber core 140 is contained in the sheath 160 so that bending occurs in the optical fibers 130.

Abstract: Terminals of upstream and downstream sides of an in-service line and a detour line are connected by optical couplers. An optical oscilloscope is connected to one optical coupler, and a chirped pulse light source is connected to the other optical coupler to thereby form dualized lines. The detour line includes an optical line length adjuster for compensating for the phase difference of optical transmission signals that occurs because of the optical line length difference with the in-service line. Pulse light in which an optical frequency is chirped is transmitted from the chirped pulse light source. The pulse light is branched by the second optical coupler, passes through the in-service line and the detour line, is multiplexed again by the first optical coupler, and is measured by the optical oscilloscope.

Abstract: Terminals of upstream and downstream sides of an in-service line and a detour line are connected by optical couplers. An optical oscilloscope is connected to one optical coupler, and a chirped pulse light source is connected to the other optical coupler to thereby form dualized lines. The detour line includes an optical line length adjuster for compensating for the phase difference of optical transmission signals that occurs because of the optical line length difference with the in-service line. Pulse light in which an optical frequency is chirped is transmitted from the chirped pulse light source. The pulse light is branched by the second optical coupler, passes through the in-service line and the detour line, is multiplexed again by the first optical coupler, and is measured by the optical oscilloscope.

Abstract: The system for supporting network troubleshooting of the invention includes: storage means for periodically storing setting/configuration data and performance data of devices constituting the network based upon a schema of device IDs, interface IDs, and a respective CONFIG version number; monitoring means for monitoring the performance data of the devices by comparing the performance data with respective threshold values; identifying means for identifying the faulty device based upon the schema, when the performance data of at least one device goes beyond a respective threshold value (“faulty device”), wherein the storage means further stores the identified result for network troubleshooting. Thus, the system can estimate a factor of a change of operating condition of the network system and repair accordingly.

Abstract: The system for supporting network troubleshooting of the invention includes: storage means for periodically storing setting/configuration data and performance data of devices constituting the network based upon a schema of device IDs, interface IDs, and a respective CONFIG version number; monitoring means for monitoring the performance data of the devices by comparing the performance data with respective threshold values; identifying means for identifying the faulty device based upon the schema, when the performance data of at least one device goes beyond a respective threshold value (“faulty device”), wherein the storage means further stores the identified result for network troubleshooting. Thus, the system can estimate a factor of a change of operating condition of the network system and repair accordingly.

Abstract: In a lower thread automatic supply device, the delivery means 19 and other devices 12, 13 of a bobbin replacing device 14 are mounted through a support plate 22 so disposed as to be shifted outwardly of a sewing machine in the axial direction of a hook 15, thereby eliminating the possibility that cloth, dust, and oil dropping down from the hook 15 and feed dog can attach directly to the delivery means 19 and other devices 12, 13, so that the respective devices 19, 12 and 13 can be kept clean. Also, the delivery means 19 and other devices 12, 13 are disposed spaced apart from a sewing machine operator to thereby be able to eliminate the danger that, when handling the sewing machine, the operator can touch the delivery means and other devices.

Abstract: A bobbin thread winding apparatus which can reliably twine a bobbin thread around the bobbin within the bobbin case. With the reliable twining of the thread, the thread is not cut and also will never be forced out of the bobbin case, thereby forming a good seam. Since the thread is not wound around a shaft other than the bobbin shaft, no manual operation is required for resetting the thread to the clamping mechanism, improving the reliability of the bobbin thread winding apparatus. The bobbin thread winding apparatus can accurately detect an effective thread winding amount of the bobbin thread irrespective of the yarn count of the thread used, and does not apply an excessive load to the thread winding mechanism, causing any adverse effect on the stitching quality. The bobbin thread winding apparatus allows a lower thread to be drawn out of the thread supply source and is then securely twisted around the bobbin shaft without a thread draw-out mechanism.

Abstract: A paper sheet feeder includes an input roller, an interposed roller, an output roller and a motor. The interposed roller serves both as a paper-feeder and a paper-stopper by changing the drive direction of the motor. A one-way clutch is provided at the interposed roller and is effective to allow the roller both to stop the paper and to drive the paper. The input roller is also provided with a one-way clutch. A single motor effects both sheet removal from a pile and sheet feeding.