Abstract: A systolic array system of inner product step processors is provided in the form of a mesh connected network which rhythmically compute and pass data through the system. Each processor in the system regularly feeds data in and out, each time performing some computation, so that a regular flow of data is kept up in the network. Many basic matrix computations can be readily and efficiently pipelined on systolic array network systems according to these inventions. Such arrays enjoy simple and regular communication paths and the individual processors in the networks are substantially all identical. Similar hexagonally connected processors can, for example, optionally perform matrix multiplication and LU-decomposition of a matrix. Linearly connected systolic arrays are useful for performing a variety of other computations.

Abstract: A flexible stranded body, such as an electric conductor of an overhead electric transmission or distribution system, comprises at least one stranded layer of elongate elements of metal or metal alloy, at least one elongate compartment within and extending throughout the length of the stranded body and, loosely housed in the elongate compartment, at least one separate optical fibre and/or at least one optical bundle. Preferably, the elongate compartment extends within a circumferentially rigid central core which is surrounded by the stranded layer or layers but it may be a bore in an elongate element of a stranded layer or an elongate space bounded by two adjacent elongate elements.

Abstract: A skew rolling mill for tubes is provided having a stand upright in two parts laterally separable along a vertical parting line, one part being fixed and the other movable horizontally transverse to the pass line of the mill, a pair of driven skew rolls journaled adjacent one another and inclined to the pass line, and a pair of driven guide discs journalled in the stand upright to be disposed in a vertical plane, one above and one below the pass line, the rolls and clamps being removable toward the vertical parting line and tie rods subject to pre-stress by hydraulically movable nuts.

Abstract: A readily strippable electric wiring cable comprises two electrically insulated line conductors arranged substantially parallel to one another and transversely spaced apart within a surrounding extruded insulating sheath and a bare earth conductor which is loosely housed in a bore extending lengthwise within the sheath between and parallel to the insulated line conductors. Preferably, each line conductor is itself loosely housed in a separate bore in the sheath. Double insulation is provided between the earth conductor and each line conductor.

Abstract: Movement of a body part or other movable object is measured by attaching a retro-reflecting landmark (8) to the body part. An observation field (4) containing the landmark (8) is scanned using a beam (20) of radiation from a lamp (10) and reflecting it with a rotatable mirror (18) to scan the field. The retro-reflected light (42) is detected and the time of retro-reflection by reference to the phase of rotation of the mirror (18) is measured to provide a signal related to the angular position of the landmark (8) in the field (4). More than one landmark (8) can be observed simultaneously by using landmark (8) with edge filtering characteristics and appropriate arrangements for discriminating retro-reflected light (42) according to spectral characteristics.

Abstract: The interface circuit is intended to be connected between a module terminal and a module itself and provides means for stimulating and sensing signals between the module and its terminal. The interface circuit comprises a decoupling section which connects or disconnects the interface circuit from the module, a test data section for receiving test data from outside sources, an inside section which connects the test data section with the interior of the module and an outside section which connects it with the terminal. A monitor section is also included to allow a terminal to be monitored while it is connected to from its module. The control section requires only four connections and generates the various control signals necessary to control the operation of the interface circuit.

Abstract: In a modified "Conform" machine for continuous friction-actuated extrusion of metals, especially particulate copper, the abutment at the outlet end of the working passageway does not fully block the end of the wheel groove. Instead a substantial clearance is left, and metal extruding through it adheres to the wheel to re-enter the working passageway at the entry end. Preferably the abutment is of semicircular cross-section. For a given output rate, a significant reduction in torque, and working stresses, is obtained.

Abstract: Apparatus for laterally ejecting elongate articles, such as tube lengths, from a channel defined by a roller bed, the channel extending beyond a flying saw for severing continuous lengths into said elongate articles, said apparatus being operated by a signal generator fitted to the flying saw so that an ejection operation is initiated by an optional delay after completion of a severing operation. Operation is not impaired in the event of the tube being fractured during the rolling operation, since the ejection operation takes place in timed relation to the severing operation and does not depend on detection of the presence or absence of tube ends.

Abstract: A plant for the manufacture of seamless tubes is provided having successively a roughing unit and a finishing push bench unit which finish push bench unit includes all sizing passes which are simultaneously in operation with the finishing passes on a tube at the end of the elongation operation.

Abstract: The control mechanism is for pneumatic apparatus of the kind comprising a piston-and-cylinder motor coupled between two relatively-movable parts (such as door-leaves) for driving them, when energized, to a predetermined relative position. A pilot valve is actuated when required to switch the apparatus to an emergency mode by isolating the motor from its power source and discharging it into an emergency reservoir having a volume large compared with the maximum volume of gas in the motor. While the pilot valve is actuated, the relatively-movable parts are urged towards their predetermined relative positions by a force small compared with the normal operating force. The pilot valve may be arranged to operate operation of an emergency release bolt, on obstruction detected by a detector valve (in which case a timing reservoir provides time delay before full power is restored), on power failure, or as required.