Abstract: A perpendicular magnetization type magnetic head comprises a main magnetic pole part wound with a coil, for subjecting a magnetic recording medium to magnetic fluxes which pass perpendicularly through a magnetic layer of the magnetic recording medium, a non-magnetic part located on both sides of the main magnetic pole and adjacent to the magnetic recording medium, so as to sandwich the main magnetic pole, and a closed magnetic path forming magnetic pole part for forming a closed magnetic path of the magnetic flux with respect to the main magnetic pole part. The closed magnetic path forming magnetic pole part has an edge which is bounded on the non-magnetic part. This edge is non-parallel to the main magnetic pole part.

Abstract: A method of producing a container of plastic material capable of being oriented and/or crystallized, in which a substantially tubular blank is, in at least two mutually consecutive and mutually separate shaping phases or shaping stages, reshaped into the container. The blank is reshaped into the container by mechanical forming elements (34,42) which stretch the material in the axial direction of the blank, and in the circumferential direction of the blank. By stretching the material in each separate shaping stage to a regulated degree, there will be accumulated in the material a total stretching corresponding to the requisite stretching in order to impart to the material the desired and predetermined orientation and thereby the requisite strength properties.

Abstract: An optical cable is provided which is especially adapted for use in reading optical information from an optical information carrier. The cable includes a light conductor adapted for transmitting light from the information carrier to a light-sensitive receiver. The light conductor includes a major portion of an easily bendable material such as a plastic. It also includes an end portion extending beyond the major portion of the light conductor which faces away from the light-sensitive receiver. The end portion constitutes a separate light conductor, the reception angle of which is less than the corresponding angle of the major portion. The end portion is preferably fabricated of glass or quartz. The arrangement may be such that there is a plurality of further conductors positioned about the first said conductor and also manufactured of an easily bendable material.

Abstract: An outboard engine arrangement comprises a transmission for shifting a speed change ratio at least at two stages of higher and lower speeds, the transmission being interposed between a crank shaft of an upper side engine and a drive shaft located coaxilly with the crank shaft for driving a lower side propeller and being contained within an oil pan for the engine, a vertically extending oil feed bore being provided to lubricate the transmission, and means being provided for permitting the oil feed bore to communicate with a bottom in a crank case of the engine.

Abstract: An apparatus in which a wire electrode is pulled off a supply reel, passes through a predetermined path, is led to the machining portion of a work piece to cut the work piece, there-after, the wire electrode is turned back, is returned along the path it has come to the machining portion of the work piece, and is used again to work the same work piece. At least one of these two segments of the wire electrode is advanced in a zig-zag path along the machining line when the work piece is cut, thereby allowing the working gap to be widened for improving the efficiency and accuracy of machining.

Abstract: A heat exchanger having an inlet duct for admission of a first fluid to be heated, an outlet duct for discharge of the first fluid after heating thereof, the ducts being arranged in substantially parallel relation, and an assembly of a plurality of heat exchanger tubes connected to the inlet and outlet ducts for receiving the first fluid from the inlet duct to convey the first fluid through the tubes for discharge into the outlet duct. The heat exchanger tubes are of U-shape, each including first and second straight leg portions respectively connected to the inlet and outlet ducts and a curved bend region connecting the straight leg portions for reversing the direction of flow of the first fluid from the first leg portion to the second leg portion. The assembly of heat exchanger tubes projects laterally of the ducts into the path of travel of a second fluid which flows around the tubes in a passage area.

Abstract: A telephone exchange equipment system for enabling transmission of a speech message from a fresh calling party to another busy party without interruption of the connection for the original conversation. Each of the telephone sets are connected to the exchange equipment through a four-wire cable comprising a transmitting line and a receiving line. The exchange equipment is provided with a mixer having two input terminals and an output terminal.

Abstract: Method of distorting a speech signal by rearranging and/or reversing frequency bands in this signal. The speech signal is divided into a plurality of sub-bands by filtering, and the sub-bands are individually sampled at a sampling frequencing which is at least double that of the sub-band bandwidth, for providing a plurality of first spectra each with periodic repetition of the respective sub-band. Alternating samples are polarity-reversed for providing a plurality of second spectra each with periodic repetition of the respective sub-band in reversed form. From one of these two types of spectrum a desired sub-band is then filtered out, and corresponds to the original sub-band, but is reversed and/or displaced in the frequency band as desired. All the obtained sub-bands are finally added to send the distorted signal.As an addition to the method of distorting, there is also proposed a method of recomposing the distorted speech signal.

Abstract: A well data transmitting system for use in transmission of a data signal representative of a drilling parameter sensed by a sensor in a drill string of a magnetic material at a bottom of the well drilled by the drill string to a surface station mounted on the earth's surface. A carrier wave is modulated by the data signal and is then applied to a transmitting coil wound on the bottom portion of the drill string to generate a magnetic flux signal induced in the drill string material. The magnetic flux signal is picked up as an electric signal at a coil disposed around an exposed end of the drill string on the earth's surface. The electric signal is equivalent to the modulated signal and is demodulated so that the data signal can be obtained on the earth's surface. The obtained data signal is recorded in a recorder and is processed in a data processor for controlling well drilling operation.

Abstract: An Optoelectric connection device (3a) for coupling transmission (28) and reception units (4) to a line (2) for optical information transmission. The device includes a plate (11) of optoelectric material having two directional couplers (12,13) connectable to the line (2) and a modulating directional coupler (14). A signal at the input (18,18a) for the line is cross-coupled in the first coupler (13) to the reception unit (4). A lightwave from the source (28) is modulated in the modulator (14) to form an output signal, which is cross coupled in the second coupler (12) to the output (23,23a) for the line. If the directional couplers (12,13a) are disabled, a signal at the input (18,18a) passes via the couplers directly to the output (23,23a). The connection device has a reserve input (19,19a) and a reserve output (24,24a) which are utilized for fitting the connection device into the line (2) without interrupting signal transmission on the line (2).

Abstract: A drive axle with a gear ring meshing with a drive pinion is designed with silent running properties, in that an intermediate member is secured to the differential carrier and is connected to the gear ring by an elastic coupling. Between the contacting faces of the gear ring and the intermediate member there are annular grooves and a cylindrical space is formed between an inner face of the gear ring and an outer cylindrical face of the intermediate member. The cylindrical space and the annular rings are filled with a viscous substance.

Abstract: An apparatus in which a wire electrode is pulled off a supply reel, passes through a predetermined path, is led to the machining portion of a work piece to cut the work piece, thereafter, the wire electrode is turned back, is returned along the path it has come to the machining portion of the work piece, and is used again to work the same work piece. At least one of these two segments of the wire electrode is advanced in a zig-zag path along the machining line when the work piece is cut, thereby allowing the working gap to be widened for improving the efficiency and accuracy of machining.

Abstract: An optoelectronic modulator for generating an optical signal in which a wafer (10) of optoelectronic material has two parallel light wave conductors (13a,13b) and three planar electrodes (14a,14b,14c). The latter are arranged so that two electrodes adjacent each other define by their long sides an elongate intermediate space with at most three sections, which are transversely displaced in relation to each other. One long side of one of the sections is situated approximately in the line of extension of the other long side in an adjacent section and the lightwave conductors (13a,13b) are situated in the extension lines. The lightwave conductors are modulated in counter-phase in two adjacently situated sections by a modulating alternating voltage (U) which is connected to the electrodes. The ratio between the length (L.sub.1) of the longest section and the length (L) of the electrodes is in the range of 0.70 to 0.95.

Abstract: A coaxial outlet box which is intended to be mounted on a wall, an electrical conduit front or like support surface and which can be fastened directly to the support surface or to a conventional conduit box recessed in the surface. The outlet box includes a frame-like base plate (2); a connector holder plate (5) which is arranged at right angles to the base plate adjacent a straight edge thereof and in which one or more coaxial connectors are arranged parallel with the support surface; and a hood-like cover (1) which is constructed to protect the connection of the connectors (6) with the associated cables (7). An opening in the cover side wall (10) provides access to the connector or connectors (6) for connection to respective cables.

Abstract: A method and apparatus for optimizing the radial clearance of rotor and stator vanes with their opposed structure for axial flow compressors of gas turbine power plants in which rotor disks are vented and thermally controlled by compressed air taken from the main flow path in the compressor via openings in the inner surface of the main flow path at one or more of the compressor stages. The removed air is supplied to annular spaces formed between rotor and/or seal support disks.

Abstract: An easily-opened container includes a container body (11) with an opening portion and a lid (20) cooperating with the opening portion. The lid has a central lid portion (29) and a peripheral portion located outside this lid portion and sealingly and permanently fixed to the opening portion for closing the container. The central lid portion and the peripheral portion are separated from one another by a weakened portion (22) which extends in the circumferential direction of the opening portion and at least partially around the opening portion. In a restricted region, the opening portion is provided with a recess (17) located beneath the weakened portion. A stripping unit (50) with fulcrum-effect is pivotably supported in a support region (100).

Abstract: A rotary piston machine has inner and outer rotors rotating at unequal speeds around eccentric axes, and the rotors are provided with angularly spaced profiled teeth and gaps which cooperate during rotation to define working chambers of varying volume which move between an inlet and an outlet for a fluid medium to be pumped. The outer rotor has openings therein to provide communication between the working chambers and the inlet and outlet during rotation of the rotors, and these openings are spaced axially of the outer rotor to define a solid band of material between the openings. The solid band of material is provided with a circumferential groove in which a reinforcing belt is mounted having greater strength than the material of the outer rotor. The belt can be glass, carbon or aramide fiber would as threads and impregnated with a hardened plastic such as an epoxy resin.

Abstract: A fibre-optic cable responsive to microbending and forming part of a device for measuring pressure in accordance with the principle of creating a periodic mechanical disturbance in the fibre. The cable comprises a fibre (F) having a core (C) and a core-sheathing (M). An elongated element in the form of a twisted filament (T1, T2) or a twisted band (B) extends along the fibre, and a primary shield (H) encases the fibre and the twisted element such that the twisted element contacts the sheathing at periodically spaced separate regions.

Abstract: The linear D.C. motor is provided with parallel tiers of windings arranged along a linear path. A commutator is connected to these windings and extends along and parallel to the path. A conductor is provided in the form of two parallel strips to supply current through the commutator and through the windings. A plurality of pairs of magnets is arranged with the magnets in each pair being in serial magnetic relationship on opposite sides of the parallel tiers. A support of high magnetic permeability material supports the magnets to form a substantially closed magnetic circuit having a gap in which the tiers of windings are accomodated. Brushes on the support couple the conductor and commutator, and the support is displaceable along the linear path for selectively passing current through the windings, to establish electromagnetic fields in sequence along the magnetic path. Displacement of the support moves the magnets along the linear path in correspondence with the fields.