Abstract:
A multiplex transmission system, in which a node as a transmission node transmits data frame by frame to a transmission path, and a plurality of other nodes, as reception nodes, returns a reception acknowledgment signal to the transmission path upon proper reception of the frame of data. Each of the reception nodes which properly received the frame returns the reception acknowledgment signal specific thereto to that division of a reception acknowledgment signal area in the frame which corresponds to this node. Each node discriminates the success/failure of signal transmission, by comparing the information registered beforehand in its reception acknowledgment signal table with the information in the reception acknowledgment signal area. When the information of the reception acknowledgment signal table does not coincide with that of the reception acknowledgment signal area, the transmission node re-transmits the frame and the reception acknowledgment signal tables of all the nodes are updated. The system can not only effect the addition and deletion of multiplex nodes easily without requiring the change of scale of the circuit of the system, but also discriminate trouble for each of the multiplex nodes.
Abstract:
A data processor includes an instruction detection unit for detecting that a succeeding instruction writes a read-out operand into a general register group without subjecting it to arithmetic or logical operation, in accordance with instruction decode informations provided by an instruction hold unit; a conflict detection unit for detecting a conflicting state that the preceding instruction performs a write operation into a general register of the general register group and the succeeding instruction reads an operand from the same general register, in accordance with instruction decode informations provided by the instruction hold unit; and a contention detection unit for detecting a contention state that the preceding instruction performs a write operation into the same general register and the succeeding instruction also performs a write operation into the same general register, in accordance with instruction decode informations provided by the instruction hold unit.
Abstract:
A long, linear composite article which is characterized in that a large number of composite filaments are present as spaced from one another in a continuous layer composed of copper, a copper alloy, niobium, tantalum or vanadium, each of said composite filaments having a structure that at least one strand of a linear body is surrounded by an aluminum alloy or niobium, said linear body being composed substantially of extremely fine, filamentary superconducting Nb.sub.3 Al compound having an average diameter of from about 0.03 .mu.m to about 1 .mu.m. The said composite article can be prepared by drawing a composite material composed of (a) an aluminum alloy and (b) niobium, together with copper or a copper alloy once or plural times repeatedly, until the average diameter of the aluminum alloy of (a) becomes about 1 .mu.m or less, and heat-treating the resultant linear composite material. This composite articles exhibit excellent superconducting characteristics in high-magnetic field and alternating-current magnetic field.
Abstract:
A pipelined data processor comprises a circuit for storing two instructions in a pair of instruction registers, a circuit for detecting whether those instructions are a combination of an instruction requesting the use of an operation unit and an instruction requesting the use of another resource, and a circuit to control the execution of the instructions when the decision of the detection circuit is affirmative such that those instructions are executed by the operation unit and the resource in a plurality of stages.
Abstract:
A method of plating a pattern of metal (e.g. copper or nickel) on a dielectric surface, i.e. surface of a dielectric material such as a synthetic resin or ceramic. The method comprises the preliminary step of masklessly treating the dielectric surface to selectively activate preselected areas thereof so that the dielectric surface in contact with a priming solution becomes catalytic, and thereby receptive to electroless metal deposition, selectively at those areas. The treated dielectric surface is contacted with an electroless plating solution to allow metal therefrom to auto-reductively deposit selectively at those catalized areas, thereby forming the pattern of metal desired on the dielectric surface.
Abstract:
A capacitor-type pulse generator is provided for wire-cutting EDM. The generator includes a capacitor connected on one hand to a DC source in series with a charging switch and on the other hand to the EDM gap in series with a discharging switch. A first sensing circuit turns the discharging switch into conduction when the charging voltage on the capacitor reaches a predetermined level. The charging switch is normally in its conductive state and is turned into its nonconductive state when a second sensing circuit senses that the EDM gap voltage exceeds a preselected value. In a modified generator, parallel-connected discharging switches are triggered in sequence when the capacitor voltage reaches the predetermined level.
Abstract:
A magnetic encoder system comprising a rotary disk formed thereon with a succession of discrete magnetic encoding units each of which consists of a pair of opposed magnetic poles (N, S) and extends in alignment with a radial direction of the rotary disk. These magnetic encoding units are formed successively adjacent to the periphery of the disk and have alternating magnetic polarities. A magnetic sensing head is disposed substantially coplanar with the rotary disk and juxtaposed with the periphery of the disk across a small magnetic gap spacing.
Abstract:
A wire-cut EDM method and apparatus in which an electrode wire traveling between a pair of wire-positioning guide members is laterally advanced, generally tangentially along a workpiece contour disposed therebetween to electro-erosively cut a precision contour in the workpiece contour with a depth of cut at most equal to the diameter of the wire. The fluctuating machining pressure, induced by the gap erosive electrical discharges and fluid injection, tends to undulate the traveling wire in the open space flanking the contour being cut and to misalign the axial position thereof away from a prescribed path of advance in the cutting zone. A rotary mechanism, rotatable about its axis of rotation coinciding with the straight-line path established for the traveling wire axis between the wire positioning guide members, carries a wire-backing support member disposed in the cutting zone and having wire supporting surfaces parallel to that straight-line path to hold the traveling wire against the machining pressure, and is rotated to orient the wire-backing support member so as to oppose those surfaces with the area of contour being cut and to avoid a collision of the support member with the workpiece.
Abstract:
To regulate the flushing liquid medium in the cutting zone of a TW electroerosion apparatus an elongate element is introduced into the cutting slot formed behind the advancing wire electrode and is maintained immediately behind the wire electrode and in parallel therewith, and thus dams the flushing medium in the space between the wire electrode and the element while serving to hold the wire electrode against deflecting rearwards. The elongate element is advantageously a tube having one or more apertures formed in a lateral wall thereof juxtaposed with the wire electrode, through which apertures the cutting liquid medium is discharged into the cutting zone and/or the flushing liquid medium in the cutting zone is sucked to assure an equalized distribution in the rate of flow in the cutting zone across the thickness of the workpiece. During a course of the cutting operation, the elongate element may be axially moved or reciprocated, or laterally oscillated.
Abstract:
A flushing fluid recycling system used with an electroerosion machine which includes a regenerating unit, i.e. an ion-exchange column as deionizer, through which the used liquid medium, e.g. water, collected from an electroerosion zone is passed for regeneration and return to the electroerosion zone. A pump is periodically actuated to intermittently pass the liquid medium through the deionizing column with predetermined on-time and off-time regardless of whether the value of an electrical property, e.g. specific resistance of the fluid, determined by a sensing unit lies above a certain level. However, the ratio of the on-time to the off-time is altered depending on the particular value of the electrical property sensed.