Abstract: A lip-seal for sealing the junction between two parts includes a body for mounting on one part, a sealing lip extending therefrom for application against the other part, and an inflatable chamber defined between the body, the lip and a diaphragm extending between, and connected to, the lip and the body, the arrangement being such that on inflation of the chamber the profile of the lip is modified so that it is moved away from the other part to permit the other part to be assembled with the one part without damage to the lip seal and without premature application of the lip to the other part.

Abstract: A hydraulic engine of the type working between a high pressure and a low pressure and comprising working chambers and mobile elements movable in said working chambers, wherein means are provided for connecting said working chambers in turn with the low pressure source.

Abstract: A fluidized bed reactor adapted for carrying out chemical reactions between liquids and solid particles, having a design which provides stabilized hydrodynamic conditions within the reactor zones and thereby avoids the disadvantages of blockages of grid holes and passages in the system during operation. Fluid inlet tubes are provided which are slidably supported, with fluid outlets which rest on the bottom of the reactor, sealing against reverse flow, and which lift up due to hydraulic forces upon introduction of fluid to the reactor.

Abstract: In a cylonic incinerator for burning liquid and solid wastes, one or more scraper bars are suspended by a non-rigid suspension from support arms projecting from a vertical driven shaft, so as to spread and disturb the waste on the floor of the incinerator.

Abstract: This disclosure relates to a bearing assembly for large rolls, particularly rolls utilized in the paper making industry wherein the end portions of the rolls are tubular to define sockets and inserted in each socket is a sleeve which is particularly configurated to have a housing fixedly fitted therein, the sleeve and housing having axially spaced contacting surfaces and the housing carrying axially spaced bearings with the bearings journalling the housing on the stub shaft. The construction is such that with a roll blocked in place, the housing, complete with bearings and stub shaft, can be removed as a unit from the sleeve facilitating quick and easy replacement.

Abstract: A method of checking a storage battery with series-connected cells comprises the steps of:Passing a charging current pulse through the battery,Measuring an elementary transient voltage at the terminals of each storage cell; andComparing elementary transient voltages with the average transient voltage of the said storage cells (total transient voltage divided by the number of storage cells).The battery is rejected if the absolute value of the difference between the said average transient voltage and one of the elementary transient voltages, when the difference maintains a constant sign, becomes higher than a predetermined threshold and, when the difference changes signs, if the sum of the maximum absolute values of the differences in constant sign becomes higher than a predetermined threshold. Application: checking lead-acid storage batteries when they come off the production line.

Abstract: Elongated, hollow elastomer seals particularly useful for the sealing of bridge deck joints, bridge approach joints and like wide joints against intrusion by liquids and incompressible solids and embodying a transversely concave top wall; side walls and a bottom wall, and an internal web structure with a pair of webs extending respectively between intermediate portions of the top wall located intermediate the longitudinal midportion thereof and respective side walls and respective intermediate portions of laterally extending internal webs to resist inward rolling of the upper longitudinal corners of the seal away from the joint faces when the seal is seated under lateral compression in a joint.

Abstract: A process for the manufacture of a circular helix waveguide comprising a helically wound insulated metallic wire covered with a barrier layer and forming a wound and wrapped structure itself covered by a metallic screen, wherein a metal band is shaped into a tube, the contiguous edges of the said band are welded by a high frequency current in such a way that after welding the internal diameter of the shaped tube is a few millimeters greater than the external diameter of the wound and wrapped structure, the said tube is placed around the said structure, then the said tube is shaped into a cylinder with a circular base on the said structure to constitute the said metallic screen.

Abstract: In a double correlation device incorporated in a radar installation for muring distance, the transmitted high-frequency signal is modulated, by frequency displacement, by a series of pseudo-random pulses. The first correlation is carried out between each pulse of the series and a delayed version of the series, the delay being chosen to correspond to the distance zone to be swept. The resulting signal undergoes a second correlation with the signal received after reflection from the target and controls a switch in order to deduce information on the distance investigated.

Abstract: The selector switch has two operating positions, indicated by different colors of light. An operator knob having two spaced translucent portions of different colors is drivingly connected to a tubular switch operator rotor. A lamp shield is received within the rotor around a lamp. The lamp shield has an aperture which directs light only through the translucent portion of the selector switch knob directly over the aperture so that the color of the visible light corresponds to a particular operating position of the selector switch knob.

Abstract: A refractory composite material usable in making gas-turbine blades for aviation applications. The composite material comprises a nickel-based superalloy matrix containing cobalt, aluminum in the form of a Ni.sub.3 Al precipitate, and tungsten, and a reinforcing phase of oriented monocrystalline niobium carbide fibers formed in situ during production, by unidirectional solidification. The composition of the composite material by weight expressed in percent is:Co -- 20-30%Cr -- 6-15%W -- 7-10%Al -- 3-6%Nb -- 4-6%C -- 0.4-0.65%Ni balance to 100.

Abstract: A drain trap and cover assembly adapted for installation at the upper end of a vertical drain pipe passing through the concrete floor comprises a cup-shaped bowl having a flange at its upper end to which is pivoted a cover swingable between bowl-closing and bowl-opening positions. The pivotal connection comprises a pivot pin carried by the cover and rotatably accommodated in a socket formed in the flange. The socket has a throat which opens into the socket, the size of the throat being slightly less than the diameter of the pivot pin. The material from which the flange is made is sufficiently resilient to enable the throat opening to be enlarged and allow passage from the pivot pin into the socket, following which the throat opening reassumes its normal size to capture the pivot pin within the socket.

Abstract: The present invention is related to a device for measuring the mass of particles of an aerosol per volume unit. It comprises a solid measuring body, measuring means for measuring the resonance frequency of said solid measuring body, means for generating a flow of air loaded with particles and for directing said air flow toward a planar receiving electrode and means for electrically loading said particles with a polarity opposed to that of the planar receiving electrode.

Abstract: In a system for use in helicopter navigation antennas are carried at the e ends of each of the blades of the rotor of the helicopter. Radio waves transmitted by a beacon at a known location on the ground are received by the antennas and phase modulated by their rotation. On the rotor the signals are amplified and mixed with oscillations from local oscillators and are detected with the aid of reference signals from the local oscillators. By means of slip rings and contact brushes the signals are introduced into the body of the helicopter where they are first multiplied with each other and then filtered so as to produce phase-modulated signals with a carrier suppressed which are supplied to an electroluminescent diode illuminating a rotating-disc light modulator with a light-transmitting function which is analogous to the phase modulation of the signals received by the antennas. The light beam passing through the disc is integrated in a vidicon and displayed on a screen.

Abstract: An air-lift vehicle has inner and outer multi-lobed peripheral skirts arranged so that the corresponding lobes of the skirts are in register. Means is provided to supply compressed air to the inside of the inner skirt and between the inner and outer skirts for lifting purposes. The space between the skirts comprises a plurality of compartments each defined by two corresponding lobes of the inner and outer skirts. The lower edges of the lobes of the outer skirt at least are located in the same horizontal plane as a result of which the height of lift and the stability of the vehicle are improved.

Abstract: An improved versatile device which is useful in detecting leaks of cyrogenic material from transporting, storage and processing equipment and for indicating the location of the leaks.

Abstract: This invention refers to a high efficiency escapement wherein the pallets embrace more than one fifth of the teeth of the pallets wheel, and wherein the entry-pallet embraces relative to the line joining the center of the escape wheel to the pallet staff at least one tooth more of said wheel than the exit-pallet relative to said joining line.

Abstract: In a vehicle guidance system, a circular-section guidance rail is embraced y a detector on a vehicle. At a fork, where the rail progressively broadens prior to dividing, the rail height is reduced so that a detector, when tilted to select one branch of the fork, has its lowered side between the rail and a side wall of a channel in which the rail is mounted and its raised side riding over the broadened rail.

Abstract: Hypocholesterolemic compounds of formula ##STR1## wherein R.sub.1 to R.sub.5, which may be the same or different, are hydrogen or halogen atoms or hydroxy, lower alkyl, lower alkoxy, trifluoromethyl, nitro, amino or sulphonylamino groups; or R.sub.1 and R.sub.2 together represent a methylenedioxy group, R.sub.6 is a hydrogen atom or a lower alkyl group; R.sub.7 is a lower alkyl, lower cycloalkyl, phenyl or lower phenylalkyl group; or wherein R.sub.6 and R.sub.7 when taken together with the nitrogen atom to which together with the nitrogen atom to which they are linked represent a saturated heterocyclic group having 5 to 7 ring members (optionally comprising an oxygen atom or another nitrogen atom as a second heteroatom, which latter nitrogen atom is unsubstituted or substituted by a lower alkyl group); and n is an integer of from 0 to 5; and the salts thereof.

Abstract: The invention relates to a sodium-sulphur battery for electrical drive. It is formed by elements each comprising a cathode tank containing sulphur, a solid electrolyte tube closed at its lower end, containing sodium and arranged in the said cathode tank, a ceramic insulating support for keeping the said electrolyte tube in the said cathode tank, an anode tank containing a supply of sodium, that battery being characterized in that it comprises m groups of n modules each comprising p elements, those elements being electrically interconnected in parallel in each of the modules by means of plates connected to the bottoms of the said cathode tanks and anode tanks respectively, each of the said plates comprising a substantially central bore. The invention is implemented for propelling all electric vehicles.