Abstract: A street sweeping apparatus with a sweeping device (10), a sweepings container (6) and a pickup device (2) for feeding the sweepings from the street into the sweepings container (6). The street sweeping apparatus is characterized in that the sweeping device (10) and the pickup device (6) are parts of vehicle (1) suitable for use in normal traffic and the pickup device (2) is an independent unit, which can be detachably joined to the vehicle (1) for travel therewith. The intake opening of the housing (11) of the pickup device (2) is at the level of the street at the rear of the sweeping device (1) and the transfer opening of this housing (11) is connected in a dust-tight manner with the intake opening of the sweepings housing (6). Sweeping rollers (12 and 13) which mesh with each other in the manner of gear wheels are rotatably supported in the housing (11) to take up the sweepings and feed them to the sweepings container ( 6).

Abstract: A device for controlling a rotating-piston machine in which inner and outer rotors rotate at unequal speeds and profiled teeth thereon form gaps to define working chambers which move, with change of volume, from an inlet region to an outlet region of the machine. The device comprises a body having a feed channel for a working fluid, a plurality of supply channels which open into the inlet region and two rotary slide valves for controlling communication between the feed channel and the supply channels to fill the working chambers during development of suction therein upon rotation of the rotors. The body has two round cutouts each containing a respective rotary slide valve. One slide valve controls supply of fluid at the beginning of development of suction in each working chamber whereas the other slide valve controls supply fluid at the end of development of suction in each working chamber. Each cut-out is connected to the feed channel and to respective associated pluralities of supply channels.

Abstract: A conical receptacle for supporting a cone is provided with a shield mounted in a slide for variable extension relative to the receptacle. The slide is mounted on a portion of a cylinder affixed to the receptacle with a protrusion on the slide being provided for manipulation by a user.

Abstract: An axial blade wheel of a gas or steam-driven turbine comprising blades having substantially laminar boundary layer flow up to a point of maximum velocity on the upper surface of the blade, the upper surface of the blade being provided in a region downstream of the point of maximum velocity where the fluid flow velocity decreases with a spoiler edge of saw tooth profile which extends substantially over the entire blade length.

Abstract: A capacitive measuring system for measuring the distance between two relatively movable parts based on measurement of capacitative charge comprising a measuring sensor which forms one plate of the capacitor whose gap is to be measured. With the position of the sensor face in the fixed part of casing being known, the plate distance of the gap capacitor provides a direct measure of the gap.

Abstract: A machine tool comprises an upstanding column, a tool-driving unit vertically movable on the column, and a pair of guide rails on a front surface of the column to extend vertically thereon and horizontally spaced apart from each other for guiding the upward and downward movement of the tool-driving unit. The tool-driving unit includes a lift frame on the guide rails and a tilting-type turret head which is supported on a front surface of the lift frame and is rotatable about an axis inclined relative to the longitudinal direction of the frame in a horizontal plane. One of the pair of guide rails is relatively disposed forwardly of the other guide rail, so that the individual guide rails both assume positions close to the turret head thereby to minimize the amount of overhang of the tool-driving unit.

Abstract: A device for analyzing the composition of the exhaust gas of an internal combustion engine in which a light source provides a light beam absorbable by the exhaust gas, and a plurality of measurement cells are traversed by radiation of the light beam while the exhaust gas flows through the cells. A corresponding number of radiation detectors are arranged after the measurement cells to receive the absorption attenuated light radiation and to produce an electrical measurement signal. At least one light interrupter periodically interrupts the light radiation.

Abstract: A heat exchanger having a matrix of tubes around which hot gases flow, the matrix comprising spaced internested oval profiled tubes connected to a manifold for supply of compressed air to the tubes. The manifold is composed of a plurality of superimposed elements assembled on another in fluid-tight fashion. The profiled tubes have rectangular or square base ends which are fitted into corresponding openings in the superimposed elements.

Abstract: This invention relates to a compact roller used as a tape recorder pinching roller for such as cassette tape recorders and VTR's or as a paper feeding roller for such as copying machines, facsimiles and printers.

Abstract: An extractor device for extracting a connector secured in a rail comprising a body member having a chamber for receiving the body of the connector to be extracted and an actuator coupled to the body member and including a bolt which is externally operated for applying force to a shoulder portion of the connector and counter bearing force to the rail to axially extract the connector from the rail.

Abstract: Apparatus for providing a calibrated gas pressure comprising a piston mounted within a cylinder, there being provided a gap between adjacent walls of the piston and cylinder, the cylinder being generally closed at one end so as to provide a closed chamber. The closed chamber includes an outlet for gas at a calibrated pressure and a variable outlet valve. A gas inlet is provided in the wall of the cylinder adjacent to the position of the piston, and the piston engages a force measuring apparatus such that gas, in use, is supplied to the gas inlet and passes to the chamber to provide a calibrated gas pressure within the chamber, the pressure being measured by the force measuring apparatus.

Abstract: A data processing system which includes an address bus connected to k computer elements is supervised with the aid of an arrangement including a plurality of indication registers connected to the bus and to an error signal generator. The address bus is capable of transferring 2n>k binary addresses. The indication registers are each accessed by its address transferred through the bus and each register stores an indication if its address is also assigned one of the computer elements. The generator generates an error signal on the reception of an indication that an address being transferred through the bus is not assigned a computer element.

Abstract: A gas turbine plant in which the drive line of a power turbine extends substantially parallel to the longitudinal axis of the gas generator, the compressor drive turbine and power turbine being traversed in opposite directions by heated exhaust gases from a combustion chamber. A heat exchanger receives exhaust gases from the power turbine to heat compressed air to be delivered to the combustion chamber. The heat exchanger includes a matrix of U-shaped tubes connected to supply and discharge ducts of compressed air. The entire tube matrix is enclosed within an exhaust gas collector housing mounted downstream of the exhaust gas outlet of the power turbine and extending along the combustion chamber. The ducts are arranged in substantially parallel, adjacent relation and are each closed at one end. The open ends of the supply ducts respectively communicate with an outer channel of the plant which terminates at an end of the combustion chamber to receive compressed air to be heated.

Abstract: An automatic transmission comprising a planetary gear mechanism having a first gear driven from a drive shaft, a second gear engagable with the first gear to transmit speed change output to a driven shaft, and a third gear engagable with the second gear to control the operation thereof. A centrifugally operated clutch operates to directly connect the first gear and second gear when the rotational speed of the driven shaft exceeds a predetermined value, and a ratchet type one-way clutch is disposed between the third gear and a fixed construction member to permit rotation of the third gear in the same direction as that of said drive shaft but prevent rotation in the reverse direction.

Abstract: A speed reduction device for transmitting the rotation of a drive shaft to a driven shaft in a speed reducing manner. An eccentric cam is securely mounted on the drive shaft and has a central axis eccentrically offset from a central axis of the drive shaft, and the driven shaft is rotatably mounted in eccentrically offset relation from the drive shaft by an eccentricity equal to that of the eccentric cam. The driven shaft includes a pair of opposed surface portions which are adapted to rotate in a normally clamping and circumscribing relation with respect to the eccentric cam. When the speed reduction device is used in an intake and exhaust valve timing and actuating device of an internal combustion engine, a crank shaft serves as the drive shaft, while a follower cam associated with intake and exhaust valves serves as the driven shaft.

Abstract: A brush seal for use in thermal turbomachines comprising bristles which consist of oxidic or non-oxidic ceramic fiber.

Abstract: A heat exchanger having first and second ducts respectively for the supply of compressed air to be heated and for the discharge of heated compressed air. A tube matrix includes first and second branches respectively connected to the first and second ducts for conveying compressed air from the first duct to the second duct. The tube matrix is exposed to the flow of hot gases therearound to heat the compressed air conveyed in the tube matrix. A plate heat exchanger connects the first and second branches of the tube matrix to convey the compressed air from the first branch to the second. The plate heat exchanger is formed by spaced plates between which the hot gases flow, each plate being connected to rows of tubes of the matrix in the first and second branches and forming a flow chamber in which the compressed air can be conveyed.

Abstract: The hollow shaft of a high pressure compressor is provided in a conically tapering section downstream of the last rotor disc on its inner surface with a vane-like rib arrangement for conveying a stream of cooling air from the vicinity of the axis of the shaft into the outer peripheral regions of the last rotor disc. The stream then passes through corresponding circumferentially distributed axial holes in the rotor disc. In this way, better cooling of the last compressor stages which have been heated by the main stream of air in the compressor and a reduction in the stresses in the structural parts can be obtained.

Abstract: A capacitive measuring system including a sensor for measuring the clearance between a movable part and a fixed casing facing the movable part, the sensor is secured in the casing and has an active face facing the movable part to constitute a capacitor whose charge is representative of the clearance. A triaxial cable connects the sensor to an amplifier. The triaxial cable has a central conductive core and two surrounding conductors insulated from one another and from the core. The sensor comprises a central body including a disk with a surface constituting the active face of the sensor made from a metal of the platinum group (VIII) or an alloy thereof. The central body is connected to the core of the triaxial cable. Two conductive shields surround the central body and are connected to respective conductors of the triaxial cable. An electrical shielding or insulation of ceramic or glass is between the central body and the conductive shields.