Abstract: The needle selection device has multiple selectors arranged in axial grooves formed in the skirt of the needle cylinder, each selector arranged below a needle and oscillatable in a radial plane of the needle cylinder from an active position, in which a butt protrudes radially from its groove, for the engagement of the butt with cams for actuating the selectors arranged around the needle cylinder to move the selectors along their groove in the needle cylinder so as to activate the overlying needle, to an inactive position, in which the selector is positioned in its groove in the needle cylinder so that it does not interfere with the selector actuation cams. The device has selector extraction elements to transfer the selectors from the inactive position to the active position and selection elements to transfer the selectors from the active position to the inactive position or to keep them in the active position.

Abstract: A measuring arrangement for autoclaves or similar arrangements under heavy climatic conditions includes at least one measuring probe, a measuring electronics connected with the measuring probe via a connection line and arranged in a thermally insulated container. The measuring electronics includes a transmitter unit to which a transmitting antenna is associated, which is arranged outside of the container on a lid provided therefor and is connected via a connection line. A separate receiver unit is associated with a receiving antenna. The thermally insulated container contains two oppositely oriented Dewar vessels arranged one within the other, the inner Dewar vessel accommodating the measuring electronics. The connection lines are led through the interspace between the Dewar vessels and are connected to a coupling tightly provided in the lid. A corresponding coupling is associated with the coupling means for connecting the transmitting antenna and the connection line to the at least one measuring probe.

Abstract: A vertical conveyor is disclosed having a frame with a first and second vertical frame section spaced apart but supportingly connected to each other. Load supports having first and second ends are conveyed around a looped path. Each load support is movably mounted at the first and second ends to first and second frame sections. A pickup chain assembly has a pickup drive chain, an upper drive sprocket driven by the motor wherein a substantial amount of the load exerted by the supports against the pickup chain assembly is imported against the upper drive sprocket. An idler sprocket is aligned below the drive sprocket and has a smaller diameter than the drive sprocket. The pickup drive chains include a plurality of pickups pivotally mounted thereto which engage transverse axles mounted at the end of compression links of a compression chain assembly. The load supports are mounted on the compression chain assembly.

Abstract: A method and apparatus for lining concrete structure elements includes a plastic sheet. The plastic sheet has a first layer formed of a heat-reflective material of a first color, with a plurality of attachments disposed on a first side thereof. A second layer is disposed upon a second side of the first layer. The second layer is formed of a material of a second color different from the first color. Reduced thermal expansion, improved concrete/liner bonding, and improved identification of defects is thereby provided.

Abstract: A telescopic extensible rod, suited to be used as extension in agricultural pneumatic tools for picking fruit from trees or of cutting off branches of trees, is formed by two coaxial tubular elements, i.e. a first tubular element and a second tubular element that slides inside the first tubular element. A pneumatic actuator can be connected to the free end of the second tubular element. A coupling is mounted between the tubular elements to removably lock their reciprocal sliding. Two coaxial pipes, a first pipe and a second pipe, are located inside the tubular elements, the second pipe being designed to slide inside the first one while keeping the seal because of the presence of a sleeve mounted between the pipes and inside the first pipe. The free ends of the pipes are in fluid-dynamic connection respectively with a compressed fluid delivery and with the pneumatic actuator.

Abstract: A tubular shaft comprises a torque-transmitting tubular structure compris at least one torque-transmitting shell, which has elastic properties oriented along at least one helical line. To permit the tubular shaft to be used as an effective vibration damper, the shell surrounds a pumping chamber, which is adapted to contain a damping liquid and communicates through at least one constricted passage with a reservoir for damping liquid.

Abstract: A winch assembly is connected to each end of a vibratory concrete screed to move the screed across a concrete slab to be finished. Each winch assembly includes a rotatable drum with a cable wound on the drum. The free end of each cable is connected to a fixed object mounted along the side of the concrete slab. To wind the cable on the drum and move the screed along the slab, the eccentric drive shaft of the screed is connected through a variable speed belt drive to the respective drum. Each belt drive includes an adjusting mechanism for varying the effective diameter of a belt drive pulley, thus providing a variation in speed. Each winch assembly also includes an eccentric gear speed reducing mechanism, which is connected between the belt drive and the drum to further reduce the output speed to the cable drum.

Abstract: Characteristic parameters of a torque of a stepping motor and its associated driving current or voltage are measured in advance to providetorque vs. characteristic information data representative of the torque vs. driving current/voltage characterisitcs. Then, the above characteristic parameters are measured again when a real load is applied to a stepping motor as installed with associated mechanical coupling components. An actual load torque is determined by referencing the subsequently measured characteristic parameters to the previously obtained torque vs. characteristic information data. A load inertia moment can be determined by subtracting the motor's rotor inertia moment from a determined inertia moment of the entire system. Efficiency of the motor can be determined by multiplying the output of the measured load torque by the nuber of revolutions per second thereof and dividing this by the power supplied to the motor or driving circuit.

Abstract: The analyzer circuit includes a first oscillator producing an output signal having a first frequency depending on an inductance of an inductive position sensor having two oscillator coils positioned near a movable part; a switching device in the first oscillator for alternatingly connecting one of the two coils and simultaneously disconnecting the other according to a state of the switching device; a frequency divider for converting the output signal at the first frequency to another output signal at another frequency; a counter for counting a pulse signal under control of the other output signal of the frequency divider; a second oscillator connected to the counter and providing input pulses at a fixed frequency to the counter, which counts the input pulses under control of the other output signal of the frequency divider; a start synchronizing circuit for starting and synchronizing the divider and the counter; a flip-flop connected to the frequency divider and to the switching device to switch the state of

Abstract: This invention relates to drilling fluid additives that suppress clay swelling within a subterranean well and to methods for controlling clay swelling during the drilling of a subterranean well. In one embodiment trihydroxy alkyl amine is reacted with an alkyl halide or a water soluble quaternary amine to form a quaternized trihydroxy alkyl amine. The reaction products can also include condensed reaction products of quaternized trihydroxy alkyl amines. In another embodiment a choline derivative is used. The quaternized reaction products and choline derivatives are characterized by low toxicity and compatibility with anionic drilling fluid components. The products are added to water base drilling fluids which are circulated throughout a well. The drilling fluid additives and the method of controlling clay swelling provide for improved control of the rheological properties of drilling fluids along with increased environmental and drilling fluid compatibility.

Abstract: A carrier is provided as a part of a conveyor in an installation for burning away or deflagration of explosives. The carrier includes a base plate and a vat of scale and temperature-proof or resistant material mounted on the base plate for containing the explosives. The installation for the deflagration includes a deflagration reactor through which the carriers passes one after another in assembly-line operation through an entry zone and an exit zone. The invention is characterized in that the vat is mounted in spaced relation from the base plate by pillar-like supports which are distributed symmetrically on the area of the vat bottom; and in that a vertically upright bulkhead wall is arranged at least at one face of the base plate. The width and height dimensions of the bulkhead wall are such that they close the entry zone and the exit in substantially air tight manner toward the outside.

Abstract: An anti-icing system to prevent the formation of ice on, or to remove ice from selected portions of a gas turbine engine is disclosed that is not directly dependent upon the mode or speed of operation of the gas turbine engine. The system has a heat exchanger into which flows a tapped portion of air from the compressor and fuel from the engines fuel supply system. The fuel supply system includes a fuel return circuit which connects the fuel pump outlet to the fuel pump inlet so as to return or recycle fuel to the fuel pump inlet when the engine demand for fuel is low, such as under lower power operating conditions. This recycling of the fuel raises the temperature of the fuel such that, in the heat exchanger, heat is transferred to the tapped portion of the air from the compressor thereby raising the temperature of such tapped air such that it may be directed onto selected portions of the gas turbine engine to either prevent formation of ice, or to remove ice from these portions.

Abstract: A dispensable, disposable shield for stethoscopes prevents the transfer of disease or other contaminants through the incorporation of a disc of plastic film material having a defined edge surface, a pull-tab along the edge surface of the disc, and an adhesive backing on the plastic film material disc, with the plastic film material disc having a contour for covering a diaphragm of the stethoscope and with the adhesive backing covering the entire contour of the disc and being peelably detachable from the stethoscope diaphragm after use. In a second embodiment, the pull-tab is replaced by a flap.

Abstract: A one-piece separator plate suitable for use in a fuel cell stack comprising a single pressed metal plate having a peripheral raised seal region on a face of said pressed metal plate and a corresponding peripheral recessed seal region on the opposite face thereof, the corresponding peripheral recessed seal region forming a peripheral channel on said opposite face of the pressed metal plate. A peripheral insert ring is disposed in the peripheral channel, which insert ring and said peripheral raised seal region form seals between the faces of the pressed metal plate and an adjacent active cell component.

Abstract: A hot melt adhesive polymer is applied to a diaper backsheet by an aligned series of meltblowing units which are selectively operable to apply the coating in the desired geometry on the diaper backsheet.

Abstract: A foamed cellular material from polyester resins is obtained by extrusion foaming of polyester resins having melt strength higher than 8 centinewton, intrinsic viscosity greater than 0.8 dl/g and complex melt viscosity higher than 25,000 poises.

Abstract: This invention provides a water-reducible oil paint, capable of maintaining a stable suspension of coloring pigment during storage, and having the mechanical, coloring and drying properties of a traditional oil paint and methods for making same. The oil paint comprises a pigment, a base gel composition and an emulsifier-amine soap composition; the base gel composition comprises a traditional drying or semi-drying oil or oil acid, a nonionic or mixed nonionic-anionic emulsifier, having an HLB value in the range of from about 8 to about 18, and a thixotropic gel stabilizer; the emulsifier-amine soap compositon comprises at least one amine soap of an acid, selected from mono- and di-unsaturated drying oil acids, and a nonionic or mixed nonionic-anionic emulsifier. In another embodiment of the invention, the oil paint comprises at least one pigment, a complementary stabilizer, an emulsifier, a polymeric dispersant, a traditional stabilizer, optionally a wetting agent, and a drying oil.

Abstract: An enhanced method is disclosed for recovering olefins from a cracking furnace effluent stream in an olefins plant. In accordance with this method, a liquid hydrocarbon stream, preferably obtained from the compressor area drier liquids and/or from the deethanizer or depropanizer, is injected into the reaction effluent stream to condition the reaction effluent stream for enhanced condensation against propylene refrigeration. Also disclosed is an olefins plant utilizing liquid hydrocarbon injection and an improvement to existing olefins recovery process technology using liquid hydrocarbon injection for vapor stream conditioning.