Abstract: A split type stator core winding device which can continuously form windings on each of divided core elements assembled in a single stator core having a small gaps between large claws of adjacent core elements by stepwise feeding the stator core per magnet pole (core element) by rotation of the driving shaft and by passing a copper wire through a gap between claws of adjacent core elements and placing windings on each magnetic pole (core element), which is provided with means for expanding outward a part of the stator core assembled of core elements each being movable in a specified range in the circumferential direction in synchronism with rotation of the driving shaft holding the stator core.

Abstract: A split type stator core winding device which can continuously form windings on each of divided core elements assembled in a single stator core having a small gaps between large claws of adjacent core elements by stepwise feeding the stator core per magnet pole (core element) by rotation of the driving shaft and by passing a copper wire through a gap between claws of adjacent core elements and placing windings on each magnetic pole (core element), which is provided with means for expanding outward a part of the stator core assembled of core elements each being movable in a specified range in the circumferential direction in synchronism with rotation of the driving shaft holding the stator core.

Abstract: For a control circuit of a three-phase alternating current motor-generator, which serves as a three-phase rectifier circuit for charging a battery with power generated by driving the motor-generator as a generator and which also serves as a three-phase inverter circuit for driving the motor-generator as a motor by using a battery and uses MOSFETs as control elements for each of three phases, a control device is provided, which, in case of driving the motor-generator as the three-phase ac generator, uses means for making synchronous rectification by using MOSFETs only on the negative potential side of respective phases and means for delaying and advancing an electric angle of the current carrying control timing by gate control of MOSFETs on negative potential side.

Abstract: An outer rotor type split stator core which can be simply assembled at one time of core elements arranged in a circular form and possesses high rigidity, wherein core elements divided into magnetic pole units composed of yokes, a magnetic pole and a claw are coupled shiftably with one another in a specified range in the circumferential direction at yokes each provided with a downward projecting arm formed on one side thereof and an upward projecting arm formed on the other side thereof by engaging opposing projecting arms in neighboring core elements.

Abstract: Extension boards and a method of extending boards capable of reducing a fabrication cost and capable of mounting electronic devices on a board with high density which board is mounted onto an electronic equipment from the beginning. In a memory board on which connectors and electronic devices are mounted, each connector is formed of an upper connector and a lower connector, and signal lines extend in the memory board, wherein terminals or connector pins of the upper and lower connectors form one pair in appearance while interposing the memory board therebetween, and each pair forms a terminal group.

Abstract: A mask control device is disclosed comprising an address generator which generates a random pattern address, a serial pattern address, and a pattern mode signal. Random pattern memories store random pattern expected and mask waveform data to be used for a random pattern test. Serial pattern memories store serial pattern expected and mask waveform data to be used for a serial pattern test. First and second pin selectors arrange the serial pattern expected and mask waveform data to generate serial pattern expected and mask waveform data corresponding to tester pins and generate serial mode designating signals designating pins to which the serial pattern test is to be applied. A selector selects the random pattern expected waveform data or the serial pattern expected waveform data generated by the first pin selector based on the serial mode designating signals. A comparator compares output waveform data obtained from the device under test (DUT) with the waveform data from the selector.

Abstract: A switching system includes a protection switch that operates to switch a working transmission line to a protection transmission line or switch an optional transmission line to the protection transmission line. The protection switch consists of a first speed converting unit, a second speed converting unit and an add-drop unit that handles a lower order signal and is sandwiched therebetween. The optional transmission line for carrying a lower order signal is connected, via the add-drop unit and the second converting unit, to the protection transmission line carrying a higher order signal during an add-drop operation. Alternatively, the working transmission line carrying a higher order signal is connected, via the add-drop unit and the first and second converting units, to the protection transmission line under a through operation mode. The protection switch is preferably realized by using an add-drop multiplexer (ADM).

Abstract: A system for optical communication between first and second optical terminal stations, containing a plurality of working optical transmission lines each for connecting between the first and second optical terminal stations, a protection optical transmission line. Each of the first and second optical terminal stations contains a plurality of working pieces of optical terminal equipment, connected to the respective working optical transmission lines, a protection piece of optical terminal equipment connected to the protection optical transmission line, and a plurality of bidirectional optical signal paths, provided corresponding to the respective working pieces of optical terminal equipment, and each operative to connect the corresponding working piece of optical terminal equipment to the protection piece of optical terminal equipment.

Abstract: A maintenance signal transmission system incorporates a transmitting station, a receiving station, a main line which connects the transmitting station and the receiving station, and a backup line which connects the transmitting station and the receiving station. The transmitting station at least includes a switch for selectively connecting to one of the main line and the backup line to transmit a main signal and a maintenance signal to the receiving station using the selected line. The receiving station at least includes an adder for adding maintenance signals which are received from both the main line and the backup line. The main and backup lines may or may not take mutually different routes.

Abstract: A transmission line switching system for switching a transmission line in operation to another transmission line when a fault occurs in the transmission line during operation comprising: a transmission line in operation constituted by a plurality of terminal repeaters, a plurality of circuit switching apparatuses, and a plurality of transmission cables, all connected in series; and another transmission line provided between a head terminal repeater and an end terminal repeater; wherein when a transmission cable is completely disconnected, information input from the head terminal repeater is returned from a terminal repeater located just before a disconnection in the transmission cable to the head terminal repeater, transferred from the head terminal repeater to the end terminal repeater through the another transmission line, returned from the end terminal repeater to a terminal repeater located just after the disconnection in the transmission cable, and returned to the end terminal repeater.

Abstract: The present invention relates to method and apparatus for heating a strip of metallic material in a continuous annealing furnace and more particularly to an improvement relating to a method and apparatus for heating a strip of metallic material in a continuous annealing furnace in which annealing of the strip is continuously carried out in such a manner that a gas serving to adjust temperature of the strip, is blown toward the strip through a plurality of gas jet nozzles which are arranged on one side or both sides of the strip, wherein the temperature and flow rate of the strip are properly determined to a required level in response to the changing of the operating conditions such as the heat cycle, line speed, thickness of strip, width of strip and the like.

Abstract: A stuff (or dummy) pulse and a stuff designation pulse which indicates existence of nonexistence of the dummy pulse are inserted in a multiplexed pulse code modulation signal to convert an input signal frequency to a higher frequency. The frame synchronization pulse is used as the stuff designation pulse. Therefore, stuff designation is possible even when the frequency difference between the input signal frequency and output signal frequency is small.

Abstract: The present invention relates to method and apparatus for heating a strip of metallic material in a continuous annealing furnace and more particularly to an improvement relating to a method and apparatus for heating a strip of metallic material in a continuous annealing furnace in which annealing of the strip is continuously carried out in such a manner that a gas, serving to adjust temperature of the strip, is blown toward the strip through a plurality of gas jet nozzles which are arranged on one side or both sides of the strip, wherein the temperature and flow rate of the strip are properly determined to a required level in response to the changing of the operating conditions such as the heat cycle, line speed, thickness of strip, width of strip and the like.

Abstract: A Multiplex system for further multiplexing signals output by low group multiplexers by means of a high group multiplexer. In this system, when at least one of the low group multiplexers is in a fault state, an alternating pattern signal is supplied to the high group multiplexer instead of the signal output by the faulty low group multiplexer, whereby the ratio of "0" and "1" of the signal output by the high group multiplexer becomes almost 1:1.

Abstract: An improved method for heat-treatment of a strip in a continuous annealing installation in which the strip is heated or cooled by bringing it into contact with a heating or cooling roll having a thermal medium passed there-through. The improvements exist in that on the basis of much experimental data and mathematical analysis, a favorable range for selecting an outer diameter of a heating/cooling roll is determined as a function of various operation parameters.

Abstract: A hierarchical data transmission system is comprised, on the transmitter side, of pre-group multiplexers and a main-group multiplexer and, on the receiver side, of a main-group demultiplexer and pre-group demultiplexers. The main-group multiplexer is fabricated as a parallel-serial converting unit, and the main-group demultiplexer is fabricated as a serial-parallel converting unit. Each of the pre-group multiplexers produces a pre-group data train having a sub-data signal which is also utilized for distinguishing one pre-group data train from another. Each of the pre-group demultiplexers is provided with a discriminator operative, by using the sub-data signal, to distinguish one received pre-group data train from another.

Abstract: The invention concerns cooling apparatus for strip metal of the kind comprising a series of spaced cooling rolls around which the strip metal is passed such that it follows a serpentine path and is cooled by contact with the rolls, and elongate gas jet devices disposed widthwise of the strip opposite the outer surface parts of respective cooling rolls in contact with the strip.

Abstract: An apparatus in which a metal strip is passed in contact partly around the outer circumferences of a number of spaced cooling rolls through which coolant passes. The apparatus includes temperature detectors for detecting the temperature of the strip before contact with each of the cooling rolls, and coolant temperature regulators controlled in accordance with the detected temperature of the strip to adjust the temperature of the coolant passing through each cooling roll to a range which limits the temperature drop of the strip such that unacceptable irregularities or distortions in the configuration of the strip cannot occur. The coolant used for each cooling roll is selected with a boiling point appropriate to the respective detected temperature for each roll. In the preferred arrangement, further temperature detectors are provided for each cooling roll to detect the temperature of the coolant, and output signals from both detectors are inputted to a control for regulating a flow rate valve.

Abstract: A steel strip continuous annealing apparatus comprising: a steel strip feeder; a heating-soaking zone for heating and soaking the steel strip at a predetermined temperature; a first cooling zone for rapidly cooling the steel strip at a predetermined cooling rate; a second cooling zone for slowly cooling the steel strip or holding same at a predetermined temperature; a third cooling zone for cooling the steel strip to substantially the room temperature; and a steel strip carry-out device; wherein the first cooling zone incorporates therein forcible cooling means, the second cooling zone incorporates therein hot-cold change-over means and said forcible cooling means incorporated in the first cooling zone is provided thereon with self-cooling means; so that steel strips of various grades of steel different in required heat cycle to be applied thereto can be efficiently and stably annealed.