Abstract: A door guard which is readily engaged with a door, the door swinging about a vertical axis above a floor. The door guard is simply formed of three members, one member for engaging the door, one member for anchoring against the floor and an intermediate locking member, all of which are pivotally connected to one another and swingable to form a rigid triangle including the door and the floor with the locking member and the floor anchoring member forming a diagonal leg of that triangle to prevent the swinging of the door about its hinges.

Abstract: A tray and one-piece blank for forming it. The tray is formed of corrugated paperboard and includes bottom, side and end wall panels. The side wall panels carrying extensions at their upper end portions, these extensions are wrapped around the end panels for reinforcement. The end panels carry extensions which are bent and positioned interiorly along the side walls, one of the extensions serving as a corner reinforcement against buckling under vertical loads.

Abstract: For separating oil from aqueous or solvent dispersions the dispersion is passed through a porous flat-shaped textile article which comprises at least partly of oleophilic fibres each having a titer below 1 dtex. The flat-shaped textile article is preferably a three dimensional article, and can have a pile and possibly also a substrate comprising of extremely fine oleophilic artificial fibres. The pile threads and eventually also the threads of the substrate are split by means of a swelling agent into many extremely fine oleophilic fibres having a low titer. The small and very small oil drops in the dispersion are withheld on the extremely fine oleophilic fibres and coalesce to larger oil droplets or oil drops which rise to the surface of the liquid due to their lower density than the liquid. The oil can be easily removed from the surface of the liquid.

Abstract: A device for correcting the combustion of internal combustion engines, in particular automobile engines, the internal combustion engine having an intake manifold, the device including a first sealed chamber directly connected to the intake manifold, a second sealed chamber separated from the first chamber by a diaphragm having a neutral position, the second chamber being connected to the first chamber through a passage for delaying transmission of pressure variations from the first chamber to the second chamber, a control device for reducing the fuel to air ratio of the air and fuel mixture, the control device being coupled to the diaphragm for activation by the diaphragm whenever the differential pressure between the first and second chambers exceed a first predetermined value and whenever the differential pressure exceeds a second predetermined value.

Abstract: An apparatus for sending a sensor, such as an eddy current sensor, into a condenser, heat exchanger or steam generator tube. The apparatus first sends the sensor, which is attached to a cable, into the tube by means of a pressurized fluid which pushes the sensor along tube interior. At the extreme of the sensor's travel into the tube, a first ferrule attached to the rear of the cable blocks a first hydraulic passage in the apparatus. By virtue of slidable control pistons in the apparatus, this blocking cuts off the pushing pressure behind the sensor and then causes wheels to frictionally engage the cable to pull the sensor back to its starting position. At this time, another ferrule, carried near the sensor end of the cable, blocks a second hydraulic passage to thereby disengage the wheels from the cable. The cycle of (1) sensor pushed into the tube (2) sensor withdrawn from the tube, is now complete.

Abstract: An optical apparatus for the deflection of a stationary beam of light to move the beam over two mutually perpendicular directions for projection onto a viewing screen. By suitably modulating the beam of light, images may be produced on the screen, as in the manner of TV images. The apparatus is defined by a piezoelectric bimorph of a known type which has been modified according to this invention so as to make each bimorph layer totally internally reflecting. The light deflection apparatus, also according to this invention, is made from a single bimorph provided with an extension of lesser mass and hence of lesser inertia. The main bimorph portion is electrically stimulated to oscillate it in a vertical (Y-axis) direction, and the extension is electrically stimulated to move it in a horizontal (X-axis) direction. The stationary beam of light is projected through the bimorph and onto the screen.

Abstract: A turbocharger construction of the divided turbine housing type. To prevent failure of the divider wall due to thermally induced stresses, the divider wall is separate from the housing and means are provided to enable at least the major portion of the divider wall to move radially with respect to the housing.

Abstract: The solids content of a thick sludge is monitored by means of a solids content monitor located in a dilution chamber into which a predetermined quantity of sludge is deposited from a sampling chamber to be diluted by a known factor (e.g. 10) by the addition of water to a predetermined dilution level. Water is sprayed into the sampling and dilution chambers to clean their surfaces and the filling and discharge of the chambers is controlled by solenoid valves operated in an automatic sequence.

Abstract: A fluid/particle separator assembly includes an apertured rotary separator mounted substantially to close an inlet to a chamber through which a fluid is forced by a pump or impeller. The separator is rotated at such a speed that inclined faces bounding its apertures, and facing in the circumferential direction of motion, occlude direct flow through the separator; particles in the flow rebound from the separator to remain on its inlet side while the cleansed fluid passes through the rotor, is centrifuged outwardly and ducted by baffles in the chamber to an outlet. A method of separating particles from a flowing fluid by means of said rotary separator is also disclosed.

Abstract: A container comprises an elongate cylindrical vessel arranged longitudinally between two supporting frames. The cylindrical wall of the vessel is in abutment against and welded to a face of a transverse connecting plate, the opposite face thereof is in abutment against and welded to one of said supporting frames. The vessel is designed specially for powdered materials.

Abstract: The present invention relates to a device for positioning and welding binding hoops around a cylindrical element, or cylinder, of revolution, around determined circumferences of the cylinder. The device comprises a cylinder support, a drive member adapted to drive the cylinder in rotation about its axis of revolution, an applying member adapted to apply a half-hoop radially on the cylinder, a magazine or half-hoops adapted to supply the applying member, and a fixed welding station.

Abstract: An exposure package for holography. A transparent substrate carries a photographic emulsion layer on both surfaces thereof. After exposure the emulsion layers are developed while remaining on the transparent substrate. The use of two emulsion layers yields greater fidelity upon readout than a single layer because of the greater recording volume and because of a filtering action to inhibit optical noise resulting from the spaced apart, accurately registered phase relations recorded in and carried by the two emulsions.

Abstract: Electro-magnetic decoy-launcher ammunition has an external housing, which houses an impeller in its lower section and encloses a charge of electro-magnetic decoy material which can be ejected by a thrust device when the impeller is excited. The charge remains in its tubular transfer container, and the thrust device is mounted within the transfer container and comprises a semi-rigid disc actuated by a piston, fitted with a peripheral projection, which defines with the disc an annular housing for a split ring for taking up play and a felt washer ensuring that the device is fireproof.

Abstract: Heat exchanger for a nuclear reactor of the type in which the main vessel is sealed by an upper slab, comprises a plurality of substantially straight exchange tubes mounted between on the one hand an upper annular tube plate associated with a secondary fluid discharge chamber and on the other a lower annular tube plate associated with a supply chamber, a ferrule surrounding the said tubes and provided with a discharge orifice for the primary fluid, a central shaft which communicates with the supply chamber, and a supply manifold and a discharge manifold for the secondary fluid, wherein it comprises a supporting ferrule fixed to the periphery of the upper tube plate and sealed at its upper end by a dome, said ferrule having on its outer periphery a supporting flange by the said slab, the manifolds being superimposed in the supporting ferrule and fixed to a horizontal plate, which is itself fixed to the supporting ferrule, the supply manifold being connected by at least one pipe to the upper end of the shaft, t

Abstract: An industrial truck, which may be a fork-lift truck, has steering wheels 1,2 at the rear which can attain high steering locks. In order to counteract the possibility of overturning the truck by accidental heavy depression of the accelerator pedal at such high steering locks, switches 16,17 are provided on the truck which are actuated by trip plates 24,25 when steering angles in excess of, for example, 78.degree. (measured as the angle turned through from the straight ahead position by the inner steering wheel) are reached. The switches reduce the engine power by setting a maximum rate of pulsing of the electric traction motor of the truck. In another embodiment, one switch is attached to a king-pin, and the bearing which rotates about that king-pin carries two lugs, one of which is actuated on each steering lock of 78.degree..

Abstract: An industrial truck has an overhead guard made in two parts 7,8. The rear part 8 of the overhead guard is pivotable about the rear end of the truck to provide access to the vehicle battery box 4 from above so that the battery box can be lifted out from above via lifting eyes 14 to enable the batteries to be recharged. The battery 4 has a cover 5 which must also be pivoted to permit removal of the battery box. The battery box 4 is located against horizontal movement in the truck. In accordance with the invention, the battery box 4 has a projecting lug (not shown) which co-operates with the rear part of the overhead guard such as to prevent vertical movement of the battery box when the overhead guard is closed. Consequently, when the overhead guard is operative (that is, in its closed position), the battery box is positively located against movement relative to the truck in all directions and cannot fall out if the truck overturns.

Abstract: The invention concerns an automatic welding apparatus for plates. A regular reciprocatory scan is carried out by an optical sensor 18 of the joint 32 between two plates 28 and 30 to be welded: the sensor 18 moves transversely of the general direction of the joint to be welded which moves past under the welding torch 10 and under the sensor 18; the time interval between the instant when the joint is sensed and the instant when the sensor passes the axis of the torch is measured and the torch is moved transversely, by means of a motor 15, in response to the measurement of the time interval, in a direction corresponding to a reduction in this interval, so as to recenter the torch on the joint 32 to be welded. This arrangement avoids drift and possible disengagement from the joint which can occur in welding processes with continuous following of the joint.

Abstract: A laser window is formed of spaced transparent strips with a high total surface area that lends itself to cooling by conduction heat transfer to metal channels between the strips. The metal channels carry either a fast flowing refrigerant or heat-pipe wick and fluid. One or both sides of the metal cooling channels can act as mirrors.

Abstract: An erodible marine or fluviatile sediment such as a sedimentary layer is stabilized by depositing on the sediment a non-setting paste-like slurry, for example, mud or clay containing a framework of gravel, using a laying head which is towed over the sea bed by a surface vessel. The slurry is mixed on the vessel and conveyed to the laying head through an underwater pipe. Distribution of the slurry from the laying head may be monitored by a television camera on the head.

Abstract: A system for the transmission of data from a number of out-station transmitters to a central receiver over a communication line or channel in which each out-station transmitter has an associated timer and a detector which "listens" to the line or channel and enables the transmitter only in the absence of detected signals from the other transmitters on the line or channel. When enabled each transmitter transmits data over the line or channel under control of its associated timer for a time interval during which the other transmitters are inhibited. The time intervals commence from the start times which differ from each other by different random delays which are short compared with the timed intervals, so that upon initial switching on of the system one of the transmitters will always commence transmission, followed by all the other transmitters in sequence.