Abstract: A tool holder is enclosed in a rack which is moved by a belt for automatic tool exchange. A stopper member provided for the rack is fitted into a positioning groove formed in a flange portion of the tool holder, thereby preventing the rotation of the holder. A magnetic induction coupling apparatus is buried in the bottom of the tool holder positioning groove. A magnetic induction coupling apparatus of a reader/writer disposed at the external position is arranged so as to face the magnetic induction coupling apparatus of the tool holder. Information is written into or read out of a memory module attached in the tool holder by way of the magnetic induction coupling between both of those coupling apparatuses. The stopper member of the rack is arranged between the magnetic induction coupling apparatus of the tool holder and the magnetic induction coupling apparatus of the reader/writer and has a magnetic material to magnetically couple these coupling apparatuses.

Abstract: The bidirectional transmission for reading and writing data is performed between a write/read unit and a memory module using the contactless induction coupling of induction coils. The write/read unit frequency multiplexes a power source signal, a sync clock, and an enable clock and transmits the frequency multiplexed signals to the memory module. The memory module rectifies the received frequency multiplexed signals to produce an operating power source and to reproduce the sync clock and enable clock and to form an enable signal from the OR of both clocks. The write and read access information transmitted through another route is read in response to the reproduced sync clock and enable signal, thereby executing the writing and reading operations of a non-volatile memory.

Abstract: A plurality of terminal units are connected to the central unit by one optical fiber line in a loop form, thereby forming a communication link. The central unit converts the data including the terminal address and control bit into the serial optical signal and outputs this optical signal. The terminal unit receives and interpretes the optical signal from the central unit and ON/OFF controls the solenoid valve. After completion of the control, the terminal unit rewrites the control bit in the reception data to the data bit indicative of the operating state of the valve and transmits the data bit to the next terminal unit. The central unit receives the signal from the final terminal unit and interprets the bit data which was rewritten from the control bit by the terminal unit, thereby displaying the operating state of the valve.

Abstract: An external system for preparing information tables is connected by a connector to a digital valve control system which controls a digital valve by driving a pulse motor according to the information tables. The digital valve control system stores in the memory a first information table for determining the control amount for the digital valve and a second information table for determining the interval between the generation of motor driving pulses. The first information table for determining the control amount is fixedly stored in the memory and the second information table for determining the type of control pattern is stored in the memory which is capable of writing and reading the information which can be freely prepared, corrected and modified by the external system. The second information table is prepared by the keyboard of the external system, transferred to the digital valve control system and written in the memory.

Abstract: A memory module is attached to a pallet having at least one workpiece thereon. Machining processing data of the at least one workpiece is written into the memory module of the pallel put on a pallet yard. When the pallet is moved to a machine tool, the work machining processing data stored in the memory module is read out and set into a controller of the machine tool. Data is written into or read out from the memory module in a contactless manner by using induction coupling coils.

Abstract: A memory is built in a tool holder to which a working tool such as drill or the like is attached. Various tool information such as kind of tool, dimensions of tool, tool use time, and the like is written into the memory. The tool holder having the memory therein is coupled with an external unit by contactless coupling means which doesn't need any electrical coupling, thereby allowing the tool information to be written into or read out of the memory. The information is transmitted between the memory in the tool holder and the external unit by way of the optical or magnetical coupling. The memory built in the tool holder consists of a non-volatile memory such that the memory content is not erased even if the power supply is shut off.

Abstract: The driving speed of a hydraulic actuator is feedback controlled by adjusting an amount of fluid by a digital valve having a valve which is opened and closed by a pulse motor. For speed control, the deviation between a set speed of the actuator which is set by a speed setting device and a detection speed of the actuator which is detected by a speed sensor is obtained. A pulse signal of a frequency proportional to the magnitude of the deviation is generated. When the deviation is positive, the pulse motor is driven using the pulse signal as a CW command pulse. When the deviation is negative, the pulse motor is driven using the pulse signal as a CCW command pulse. The rotational amount of the pulse motor is the integral of the pulse frequency which is proportional to the deviation.

Abstract: A linear solenoid-type flow control valve with a valve element position feedback loop. An input consisting of an analog command signal is supplied in the form of a serial digital signal from a modulating transmitter through an optical fiber transmission line. An actuator operating driving circuit, a receiving demodulator for reconverting the light signal from the transmission line to the serial digital signal and further to the analog command signal and supplying it to the driving circuit, a differential transformer for detecting an operated position of a control valve element and a feedback circuit from the differential transformer are integrally mounted on the coupling component of the control valve element and its actuator and in this way the component parts at the receiving side are arranged as close as possible with respect to one another.

Abstract: A frequency divided pulse is produced by frequency dividing a clock signal by speed instruction data. When the current position of the pulse motor has not yet reached a set desired position, a frequency divided pulse is outputted as a forward rotation control pulse. When the current position has exceeded said set position, a frequency divided pulse is outputted as a reverse rotation control pulse. If the set desired position is changed while the pulse motor is rotating, this change of setting is detected and the output of the frequency divided pulse is inhibited for a predetermined settling period of time, thereby stopping the pulse motor. After the vibration of the rotor which occurs during the stepping of the pulse motor is settled, the reverse rotation of the pulse motor can be started, thereby preventing the occurrence of the step-out phenomenon of the pulse motor upon reverse rotation.

Abstract: A circuit for change-over of electric signal set points applied as control inputs to a fluid control valve for controlling the pressure or flow rate of a fluid. A priority circuit including a priority encoder or priority chain is provided in an input section for set point select and change-over instruction signals from an external sequential controller. When two or more of the instruction signals are applied simultaneously, only the highest priority instruction is received to select the desired set point and the other instructions are ignored.

Abstract: An annular blower which has an internal baffle. The blower is used to attenuate glass fibers centrifuged from a spinner in a rotary fiberizer process. The internal baffle directs and uniforms gas flow in the blower and decreases turbulent flow conditions in the gas flowing from the periphery of the blower.

Abstract: A digital valve control apparatus for regulating opening of a digital valve by a pulse motor, comprising means for setting desired position and displacement speed of the pulse motor and means for selecting the set position and the set speed in response to instruction signals. While pulses having period corresponding to the set speed are produced by a frequency divider, the present position of the pulse motor is compared with the set position by a comparator. The pulses are fed to a counter which counts up or down to supply the output for driving the pulse motor until the comparator produces the coincident output.

Abstract: Displacement table data, which consist of pulse number data for N individual displacement divisions which altogether constitute a given rotational displacement of a pulse motor, are stored in a memory so that the sum of pulse numbers stored in the individual divisions may be equal to a given pulse number corresponding to the displacement of the pulse motor. Pulse period table data, which consist of pulse period data for determining the speed of the pulse motor for divisions corresponding in number to the number of divisions of the displacement table data, are stored in another memory. The pulse motor control is effected by causing generation of pulses corresponding in number to the pulse number data for the individual displacement divisions of the displacement table and having pulse periods for the individual divisions of pulse period table, and by executing the generation of pulses for the successive divisions.

Abstract: Disclosed is an extraction method for optical character recognition systems in which the necessary character features for recognition process are extracted from a character information detected and digitized by an optical scanner. In accordance with this method, the local features of every adjacent two rows or columns of a digitized character pattern on a two-dimensional plane are extracted row by row or column by column and are successively integrated so as to extract in a global manner the respective feature types such as concavity and convexity, loop and connectivity of the character pattern. At the same time, the global feature regions or segments are separated and each of the separated feature segments is coded without any loss of the information. The feature quantity of each segment is obtained on the basis of the coded representation. Any local concavity or convexity noises are eliminated simultaneously with the extraction of the global features.

Abstract: There is provided a two-coat, one-bake metallic coating method which comprises applying, first, (a) a base coat composition containing an acrylic polyol oligomer having an average molecular weight of 500 to 2000 and a non-yellowing polyisocyanate compound in a NCO/OH ratio of 0.5/1 through 1/0.5 and further containing an appropriate amount of a metallic pigment and, then, on top thereof (b) a clear top coat composition containing said acrylic polyol oligomer and non-yellowing polyisocyanate compound in a NCO/OH ratio of 0.5/1 through 1/0.5 and causing the resulting coats to cure simultaneously. There are also provided coating compositions to be used in the above coating method.