Abstract: A brake booster has a first booster cylinder and a booster piston disposed in it for displacing a rod-like master cylinder piston of a master cylinder which supplies at least one brake circuit (I, II), having a tappet for mechanically displacing the first booster piston as needed if the brake boosting is inadequate, and having a brake valve coupled to the tappet and the first booster piston for direction boosting pressure into the first booster cylinder. A second, annular booster piston surrounds the rod-like master cylinder piston and likewise has a booster cylinder. Thsi second booster piston is joined to a pump piston which is likewise annular and sealingly surrounds the rod-like master cylinder piston. When the pressure supply apparatus is in operation, actuation of the brake pedal simultaneously displaces both booster pistons and generates braking pressures in the brake circuits (I, II).

Abstract: A supercharging pressure controlling device for an exhaust gas turbocharger having a turbine and a compressor comprising a velocity control device for exhaust gas flow and a bypass valve control device the bypass valve control device provided into the bypass channel for the turbine to increase the opening when the downstream supercharging pressure of the compressor exceeds a first set value. The velocity control device controls the exhaust gas velocity by varying the degree of valve opening when the downstream supercharging pressure of the compressor exceeds a second set value, wherein the first set value of the supercharging pressure is higher than the second set value.

Abstract: Disclosed is an apparatus for continuous measurement of the proportion of relatively non-condensable gases in a flow of mixed gases such as geothermal steam. The apparatus is an open system which detects the proportion of relatively non-condensable gases in a sample flow continuously. The sample flow is condensed and supplied in a tube which conditions the sample flow to consist of a series of segments of condensate and segments of uncondensed gases. The sensor senses the relative volume of the condensate and the uncondensed gases. The data processing means receives the output of the sensor and calculates the proportion of non-condensable gases in the flow of mixed gases. In the preferred embodiment, the sensor optically detects the ratio of the volume of the condensate to the volume of uncondensed gases.

Abstract: A cryogenerator pumping system comprises at least two cryopanels, maintained within an enclosure having an open end which is adapted for attachment to the chamber to be pumped and which embodies a throttling device effective to restrict the flow of gas from the chamber to the cryogenerator pump, a relatively higher temperature cryopanel within the enclosure being arranged to project beyond the plane of the throttling device whereby to be capable of condensing water and other volatile vapors produced in the chamber and thereby prevent the deposition of such vapors upon the throttling device.

Abstract: Apparatus and the method for directing cool air to stacks of containers holding freshly harvested produce and the like, to remove field heat therefrom. Air is caused to flow in one direction through the containers to cool the produce, then the airflow direction is reversed and the air is caused to flow in the opposite direction. In this way, the produce in the container is uinformly cooled. The apparatus includes a housing having a suction fan for blowing air through an air cooler into a plenum from which the cool air passes through the containers. The direction of airflow is selected by moving damper devices relative to the housing.

Abstract: A frozen beverage machine is provided, comprising a frame containing a horizontally positioned stationary cylinder. A conventional cooling mechanism, typically comprising a compressor, a condenser, and cooling coils around the cylinder cools the cylinder. The cylinder is provided with an opening for removal of frozen beverages or ice cream. A shaft is rotatably and horizontally positioned within the frame and extends into the cylinder, where at least one beater bar is attached to the shaft. A motor assembly is operatively connected to and supported by the shaft exterior to the cylinder. A contact switch senses resistance to shaft rotation, and an adjustable spring maintains contact between the motor assembly and the contact switch until a desired resistance to shaft rotation, and thus a desired consistency of the semi-frozen beverage, is obtained.

Abstract: A method and apparatus for providing optimum control of a refrigeration system during both its cooling cycle and its defrost cycle. During the cooling cycle, the control system maintains operation of a fan for a predetermined period of time sufficient to fully evaporate the liquid refrigerant in the refrigeration system's evaporator coil. The control system initiates the defrost cycle only when the actual system parameters indicate the need to defrost. In the defrost cycle, the flow of hot gas and refrigerant is coordinated in a manner to minimize the amount of energy expended and to reduce thermal shock to the system, thereby eliminating unnecessary wear on the system components.

Abstract: Disclosed is an inverter control circuit in an air-conditioner, in which the parameters for controlling the inverter are changed over depending on the open air temperature, the cooling/heating operation mode of the air conditioner, taking into consideration the fact that the allowable maximum current of semiconductor devices constituting the inverter depends on the cooling capability, and hence on the season. In the heating operation in winter where the open air temperature is low, a larger current can be caused to flow in the inverter.

Abstract: An air conditioner for an auxiliary heating apparatus performs an auxiliary heating of a refrigerant flowing through a refrigerant circuit. The air conditioner is provided with a first auxiliary heat exchanger having a built-in first hydrogen-occluding alloy and hydrogen and a second auxiliary heat exchanger having a built-in second hydrogen-occluding alloy and hydrogen, wherein a temperature/hydrogen pressure characteristic of the second hydrogen-occluding alloy is different from that of the first hydrogen-occluding alloy. The air conditioner is further provided with hydrogen piping for circulating hydrogen between the first auxiliary heat exchanger and the second auxiliary heat exchanger, and a fan for heating the second auxiliary heat exchanger. Selector valves are also provided for circulating the refrigerant discharged from a compressor, when the axuiliary heating of the refrigerant is not performed.

Abstract: A transport refrigeration system suitable for narrow post highway trailers in which the refrigeration system intrudes into the trailer cargo space only to the extent necessary to direct trailer air into an evaporator. The evaporator is completely serviceable external to the trailer, with its inlet surface being substantially co-planar with the inside surface of the front wall of the trailer. An air delivery unit is manufactured as an integral assembly and mounted in a main support frame of the transport refrigeration system without requiring further adjustment. Mounting of the air delivery unit completes a plenum chamber for the evaporator, placing an axially narrow blower into an air flow path in which the blower draws trailer air through the evaporator and forces conditioned air back into the trailer. Mounting of the air delivery unit also places a fan into an air flow path in which outside air is directed upwardly through a condenser, and laterally through an engine radiator.

Abstract: An outdoor unit of an air conditioner includes a box-shaped casing. The interior of the casing is divided into an upper chamber and a lower chamber by a first partition wall which is arranged in parallel with the top and bottom walls of the casing. The lower chamber is divided into a heat exchanger chamber and a machine chamber by a second partition wall extending perpendicular to the bottom wall. A heat exchanger and a compressor are arranged in the heat exchanger chamber and machine chamber, respectively. Electric parts are arranged in the upper chamber and located above the heat exchanger chamber. A support rod is located in the heat exchanger chamber and fixed at one end to the first partition wall and at the other end to the bottom wall. A blower is attached to the support rod and faces the heat exchanger.

Abstract: The temperature changers consist of at least 2 communicating chambers. One chamber contains a partial air vacuum which lowers the boiling point of water present in the chamber. A second chamber contains a dessicant which adsorbs or absorbs the vapor generated by the boiling water in the water chamber. Inner support bodies between the walls of the chambers prevent the walls of the chambers from collapsing during the presence of the vacuum inside the chambers. Pores and channels inside the support body provide inter-communicating free spaces inside the chambers. In the present invention the heat exchange surfaces of the chambers are structurally adapted to be completely immersed in a beverage to increase the heat transfer actions of the surfaces. In a modified form of the invention multiple dessicant chambers with separate communications with the water chamber are used.

Abstract: A modular self-dispensing ice cream maker includes an open-ended chilling container which encloses a mixing chamber in which a dasher is mounted for bidirectional rotation. The container includes a cylindrical chamber which is at least partially filled with freezable solution for cooling ice cream ingredients. The open end of the mixing chamber receives a cover having a dispensing outlet. The ice cream maker is adapted for orientation in mixing and dispensing modes in which the container is respectively supported in generally vertical and horizontal orientations. The dasher includes blades configured to scrape an inner container wall during rotation in a first direction for mixing ice cream. Reverse rotation of the dasher advances ice cream toward the cover for dispensing.

Abstract: A yarn feeding device adapted for positively feeding elastic yarn comprises an electric motor, a speed sensor for the speed of the knitting machine and a control unit connected to the electric motor and to the speed sensor. An optimal dynamic behavior of the yarn feeding device is obtained by making use of a rotatable drive cylinder connected to the electric motor, of a rotatable guide shaft supporting the yarn supply spool, which shaft is slidably arranged such that the yarn supply spool is kept in permanent contact with the drive cylinder, wherein the control unit drives said rotatable drive cylinder with a variable speed depending on the actual speed of the knitting machine and on a yarn demand signal, wherein the range of yarn feeding speeds is limited by predetermined minimum and maximum values.

Abstract: This invention relates to a warp knitting machine in which the knitting elements and each of the warp beams are driven by separate electric motors, powered from a common electrical network. An electric clutch is included in the drive connection between each warp beam and its electric motor and said clutch is energized by the same electric network which powers the electric motors. The electric clutch is energized when electric current is supplied to it by the network and connects the warp beams with their own electric motors. Whenever the electric current in the network is interrupted, the electric clutch is disengaged.

Abstract: An anti-theft device for a marine drive unit includes a cupped member for location around a threaded fastener which secures the drive unit in place so as to enable a blocking device to be secured in position to block access to the threaded fastener and thereby preclude unauthorized removal of the threaded fastener and the drive unit, the cupped member having outer surfaces lying in mutually perpendicular planes forming a corner complementary to a corner of the drive unit to preclude rotation of the cupped member when seated in the corner of the drive unit in order further to prevent unauthorized rotation of the threaded fastener.

Abstract: A housing (20) provided with a flexible cord (10) for connecting said housing to a living object or to an inanimate object, said housing receiving a plug (30) including two through cavities (31A, 31B) each of which receives a tag (11A, 11B) fixed to a corresponding end of the flexible cord, said housing including two shoulders (24A) each serving as an abutment for a corresponding one of the tags, said abutments ensuring, once the plug has been fully inserted into the housing, that both ends of the cord are definitively retained in the housing, said housing further including an abutment (34) defining an end-of-insertion position for the plug.

Abstract: The device serves to control the desired lifting and pressure-containing movements of strip pressure rolls for the reels which serve to store hot rolled strip. These reels have a rotating mandrel. The pressure rolls are actuated by piston and cylinder units for positioning the rolls electro-hydraulically in conformity with signals which indicate the relative position of the leading strip edge which rotates with the mandrel. The positioning of the roll, by the lifting and pressure-contacting movements, is effectd by position control with subordinated pressure control in a closed-circuit position control loop and a closed-circuit pressure control loop, by input of a setpoint position value which corresponds to the respectively prevailing pressure-contacting and lifting position of the pressure rolls, and by establishment of limited setpoint pressure values for both functions or directions of movement.

Abstract: A device for making springs from wire comprises two driven mandrels located arallel to each other and adapted for winding springs from wire and a carriage feeding wire onto each of these mandrels alternatively while reciprocating along the ways from one extreme position to the other, and backwards.

Abstract: A process and apparatus for bias rolling of strip metal is provided wherein the strip stock is formed cylindrically and passed through a rolling station wherein roll passes formed by small diameter rolls traverse the stock on the bias along helical paths which successively overlap so that a uniform and flat rolled surface is formed.

Abstract: Screens for limiting heat losses from heated material, e.g. bars and slabs in rolling mills. Screens are provided in the form of strings of heat insulating bodies composed of metal shells containing insulating material. These screens may form curtains and/or covers for the hot material. Containing chambers for the hot material may be provided with such strings of elements and the chambers may also comprise structure for limiting heat conduction losses through the material supports therein. The screens may be collapsed over the hot material thereby completely surrounding and insulating the material from loss of heat. A displaceable chamber installation may also be provided for limiting heat loss when holding and transferring hot material between processing stages.

Abstract: The rolls of a rolling mill, especially the working rolls, are horizontally shifted by a compact adjusting device, with use being made, as required, of guide pieces. The device is readily arranged in cylinder blocks, and the movements of the device can be easily monitored, transmitted, and set. The predetermined motions are carried out in rigidly controlled manner and no elastic yielding is allowed because of pressure plates extending in the windows of the base frame members. The pressure plates can be horizontally aligned and they cooperate with the holding elements which are to be shifted. The pressure plates are supported by wedges which can be shifted horizontally and transversely with respect to the plane of the frame, by way of pressure posts which operatively engage the pressure plates.

Abstract: Corrugated grain bin floor plates are manufactured from flat metal sheets by a progressive die set in a punch press. A metal sheet is fed into a slitting section of the die set to form slits in the sheet extending in the longitudinal direction of the sheets. The sheet is then fed to a corrugating section of the die where the sheet is corrugated with the corrugations running longitudinally of the sheet. The metal along the slits is stretched and reformed to form openings covered by an upper hood to prevent grain from falling through the openings. The openings are located at a neutral axis for the corrugations. The bending and drawing of the metal in the sheet provides an increase in the strength of the grain floor plates.

Abstract: A method and apparatus for forming bolt and center-pilot mounting openings in vehicle wheels, particularly styled-disc vehicle wheels. A preformed rim and disc assembly is engaged and fixtured around the rim bead seat with the inboard disc face resting on a lower die assembly and without plastic deformation to the rim or disc. An upper die assembly having an array of bolt hole punches is moved into piercing-and-coining engagement with the disc to form the bolt openings continued motion of the upper die assembly against the wheel disc pushes the disc and lower die assembly into shearing engagement with a center punch which forms the center-pilot opening. The axes of the bolt openings and/or center pilot opening and/or bead seats may be aligned or offset from each other.

Abstract: A compensating bolster and die holder combination for use with the bed of a press brake to provide vertical adjustment and compensating camber to the die holder supported thereby. The die holder is vertically moveable in an open channel of an underlying elongated bolster fitted to the bed of the press; with plural wedge members, moveable transversely of the die holder, serving to adjustably position and support the latter. Each wedge member has joined thereto an indicator pin extending through one side of the bolster which operates to visually indicate the adjusted position of its wedge member; while the several indicator pins cooperate to show the relative adjusted positions of the several wedge members and the consequential adjusted elevation of the die and die holder.

Abstract: An apparatus for repairing bent mixing vanes in a nuclear reactor fuel assembly is provided, including a unique tool and a related tool handling device. The tool is an elongated tube with a housing containing two sets of opposing, high-strength blades movable between closed and opened positions. The tool is inserted into a fuel cell detected as having a grid with a bent mixing vane to a location below the damaged grid with the blades in the closed position. The blades are then remotely opened and the tool is withdrawn. As the tool is withdrawn, one blade abuts the bent mixing vane and bends it back close to its original position. The blades are then closed and the tool is fully extracted from the fuel cell. Once the tool is fully extracted, the fuel rod can again be reliably inserted into the repaired fuel cell.

Abstract: A contact support device is described. The device is attachable to a contact crimping tool and places the electrical contact in position adjacent the jaws of the tool. The device includes a cavity for supporting the contact. The cavity provides polarization of the contact therein and prevents rotation of the contact during crimping.

Abstract: The present invention relates to a pneumatic press counterbalance which holds selected parts of a press in the same relative engagement during the return stroke of a ram as during the power stroke of that ram. The counterbalance includes a base plate adapted for connection to a first part of a press. An elongated cylindrical base tube having an open end is mounted on the base plate and has a center axis substantially perpendicular to the base plate. A resilient unconfined tubular bellows for holding air has a pair of opposed ends. The bellows has an elongated tubular resilient sleeve connecting the open ends and formed integral therewith. One of the open ends of the bellows is sealingly connected to the base tube. A first portion of the tubular sleeve surrounds a portion of the base tube. A second portion of the tubular sleeve is connected to the first portion by a fold in the sleeve and has a part surrounding the first portion. A movable plate is connected to the other end of the bellows.

Abstract: A press for splicing the ends of cables, ropes and the like is described. The press is of the type which utilizes an hydraulic cylinder (5) positioned vertically and resting on a base (6). An upper frame (8) comprises a plate (9) which is fixed to the hydraulic cylinder. The piston of the cylinder has a stem which protrudes from the plate. The frame additionally comprises two lateral plates (10) opposite one to the other and arranged in the shape of a "U" and an upper plate (11) which provides support pressure. Each of the lateral plates has an opening and a loader is inserted within the openings. The loader consists of two half-matrixes, which have a plurality of notches of different diameters whereby when the half-matrixes are approached one to the other a plurality of shaped openings of different diameters is formed.

Abstract: A receptacle for the connection of gas sensors to a measurng gas chamber has a gas inlet including a feeding line connection for the measuring gas that is equipped with an operable shut-off element. A gas sensor holder is attached and held by a movable compression part that presses it in the direction toward the gas inlet as the gas sensor is attached to the measuring chamber. The feeding line for the measuring gas is connected into a measuring gas chamber and it is opened simultaneously and without additional manipulation and closed again after the removal of the gas sensor from the receptacle. To this end, the compression part is provided with an activating part for the shut-off element of the feeding line.

Abstract: The disclosed sensor probe for detecting a gas component concentration such as an oxygen concentration has a specific gas introducing tube arranged in a gas probe tube, whose one end is faced to a gas sensor portion, and possessing a gas inlet hole for introducing a gas to be measured into the gas sensor portion through the gas introducing tube and a gas outlet hole for discharging the gas. Under such a construction, since a sufficient amount of a gas to be measured can be supplied effectively into the gas sensor portion even if a velocity of the gas is low, it is possible to maintain a high measuring accuracy.

Abstract: A device for measuring the alcohol content of a gas includes an improved mechanism for determining the presence of alveolar air in the gas which is exhaled into the device by a test subject. The device has a conduit (11) into which the test subject exhales. Gas from the conduit passes through a nozzle (19) and into an intake opening (18) of a pumping device (14). Upon actuation, the pumping device extracts a first predetermined volume of exhaled air from the conduit, so that an electro-chemical cell (25) can detect the quantity of alcohol in the first predetermined volume of air. To actuate the pumping device, a predetermined value correspondig to a second volume of air must be detected by an evaluation device (28) responsive to a pressure sensitive device (27) for measuring the pressure of the gas in the conduit. In addition, the pumping device will not be actuated until a threshold circuit (35) detects a minimum pressure.

Abstract: A method and device for measuring combustion knocking in the combustion chamber of an externally-ignited internal combustion engine, the device comprising a magnetostrictive element with a maximum diameter of 2 mm and a length-to-diameter ratio of greater than 100, the device being mounted in the engine so as to be exposed to the combustion chamber. The device can include a coil to which the magnetostrictive element is connected for converting changes in magnetic conductability in the magnetostrictive element, due to pressure increases in the combustion chamber to which it is exposed, into electrical signals. The coil in turn can be connected to an electronic switching system for the engine.

Abstract: A method of leak testing electrical or electronic components, by immersion in an inert liquid at a temperature above 100.degree. C., to detect any bubbles arising from the component, after which the component is removed from the liquid and drained, wherein according to the invention the liquid in which the component to be tested is immersed comprises predominantly perfluoroperhydrofluorene, C.sub.13 F.sub.22.

Abstract: In using the method for testing for leaks, in an above ground tank of liquid having a lower specific gravity and a lower electrical or thermal conductivity than water, first an amount of water sufficient to cover the bottom of the tank is introduced into the tank after which the level of the water in the tank is determined and changes in the level of the water in the tank over time are sensed. Additionally, the amount and rate of leakage relative to the capacity of the tank and the change in the level of the water of the tank over a selected time period are determined from the given parameters and the change in water level.

Abstract: The leak detector is utilized for determining the presence of a leak in an above ground tank of liquid having a lower specific gravity and a lower electrical or thermal conductivity than water. The leak detector includes a device for determining the level of water in the tank and a mechanism for sensing changes in the level of water in the tank over time. A leak detecting system utilizing the leak detector will also include an apparatus for determining the amount and rate of leakage relative to the capacity of the tank and the change of the level of the water in the tank over a selected time period.

Abstract: A consistometer usable at a work site comprises a stationary receptacle (9) which is placed in an enclosure (3) defined by a consistometer casing (2) and is provided with a stirrer (17) with a rotary drive spindle (18). The casing has an extension (20) in which there is arranged an intermediate shaft (23) angularly fast with a torque receiver (22) of a magnetic type actuated from outside the extension by a driven torque transmitter (21). Shaft (23) is angularly fast with a coupling device (24) for engagement with the spindle simply by the spindle being introduced into the coupling device when the receptacle is placed in the casing.

Abstract: A device-implemented method for monitoring the cutting condition of a machine tool during machining of a workpiece senses acoustic emissions resulting from the machining of the workpiece, produces an electrical signals which varies in accordance with changes in the sensed acoustic emissions, and variably amplifies the signal by a gain level selected by a set of digital data stored in the memory (12) of a computer (15). The signal is amplified by an amplifier (32) having a variable gain input (34) controlled by the computer (15). The signal is processed by two circuits (36, 40, 56 and 36, 42, 50) which respectively generate two separate sets of digital data representing the cutting condition of the tool. The computer (15) compares the data with memory-stored information to determine whether an alarm signal should be generated. A circuit (75) is provided for generating a control signal indicating that cutting of the workpiece has commenced.

Abstract: In an abnormality detection apparatus for vehicle engines, a deceleration discriminating circuit discriminates a deceleration state of a vehicle engine on the basis of a running state of the engine detected by a running state detector for detecting a running state of the vehicle engine. When the deceleration discriminating circuit determines that the engine is being in deceleration state, a comparing circuit compares a vehicle speed detected by a vehicle speed detector with a predetermined value. An abnormality deciding circuit is responsive to a comparison result signal from the comparing circuit to decide abnormality of the vehicle speed detector.

Abstract: A network of bristles extending across a steam injection well provides affirmative liquid/vapor separation and control. The orientation of the bristles is controlled to direct the liquid toward or away from the borehole wall as desired.

Abstract: A box-like housing which is enclosed to form a chamber. The chamber is partitioned by wall-like structure and further forms a plurality of channels in which a plurality of balls having various densities are contained within the channels. Measuring fluid flows through one end of tubular element mounted on the top of housing and into the channel, and the number of floating balls indicates the specific gravity of fluid and the freezing and boiling point of the fluid.

Abstract: The accelerometer comprises a substrate (52), a metallic movable plate (50), and a mounting system (54) for mounting the movable plate such that it is positioned above the substrate and can rotate about a flexure axis (64) that is above and is substantially parallel to the substrate. The flexure axis divides the sensing element into first (66) and second (68) sections. The total moments of the first and second sections about the flexure axis are different, such that acceleration normal to the substrate tends to rotate the sensing element about the flexure axis. A first electrode (74) is mounted by the substrate adjacent the first section to form a first capacitor (C.sub.A), and a second electrode (76) is mounted by the substrate adjacent the second section to form a second capacitor (C.sub.B).

Abstract: An ultrasonic inspection apparatus and method in which a linear array of acoustic transmitters and receivers are disposed adjacent to a workpiece, and alternating potential source is connected to some of the acoustic transmitters to project a side lobe of an acoustic wave toward a specific zone of the workpiece. Thereafter, the connections between some of the acoustic transmitters and the potential source are automatically changed, to move the specific zone as many times as may be necessary to provided scanning of the workpiece.

Abstract: Disclosed is an ultrasonic probe which is capable of externally and selectively controlling the conversion efficiency of an electroacoustic conversion portion. For the electroacoustic conversion portion is used a material which does not exhibit or exhibit the piezoelectricity depending on the absence or the presence of bias electric field, for example, a certain kind of ferroelectric material which is maintained at a temperature in the vicinity of the phase transition temperature thereof or a material having high electrostrictive effect. The electroacoustic conversion efficiency is controlled by applying bias electric field to such a material.

Abstract: Optical fibre splice mechanical testing apparatus for use with optical fibre splicing equipment comprises two optical fibre clamping devices for mounting on splicing equipment at spaced positions spaced lengthwise of the two optical fibres to be spliced and located on opposite sides of the splicing station. One clamping device is constrained to move towards or away from the other clamping device in a direction lengthwise of the optical fibres between a first position nearer the splicing station and second position remote from the splicing station and is urged towards the second position by a coil spring. The movable clamping device can be temporarily maintained in the first position against the action of the coil spring.

Abstract: The multipurpose vehicle of the present invention is designed to operate in and around dry docks and wharfs and its capable of lifting and moving propellers from propeller shafts within areas confined by a ship's rudder and to carry the propeller to an area away from the ship to be lifted to the wharf by crane. The propellers may weigh as much as 75,000 pounds and be 23 feet in diameter. The vehicle may also be used to accurately position keel blocks and haul blocks weighing up to 25,000 pounds in positions to support a ship. The vehicle may be lifted by crane out of dry dock to test padeyes for safety and certification by applying up to a 50,000 pound pulling force to the payeyes. The vehicle's upper arm can be extended to about 40 feet high or can be lowered to a level permitting the vehicle to pull or carry articles into buildings on the wharf.

Abstract: A magnetic field generating device for an electromagnetic flowmeter of the residual magnetization type which comprises a pair of first yokes having one of their end faces disposed opposite to each other on both sides of a magnetic gap including a fluid conduit of a non-magnetic material, a core disposed between the other end faces of the first yokes, a coil wound around the core, and at least one second yoke in direct contact with at least one of the first yokes and in direct contact with the associated end face of the core. The second yokes are made of a magnetic material having low electrical conductivity and high permeability. The core has an axial length shorter than that of the coil.

Abstract: An electromagnetic flowmeter includes a cylindrical flow path, an even number of magnetic poles disposed on the periphery of the cylindrical flow path by equally dividing the circumference thereof, a plurality of cores having one ends respectively being in contact with the even number of magnetic poles and extending outwardly radially with respect to the cylindrical flow path, a plurality of coils respectively wound about the cores for exciting the cores so that respective adjacent cores exhibit opposite polarities to each other, an outer yoke having a ring shape for connecting the other ends of the cores to form a magnetic circuit, and a plurality of electrodes disposed respectively at intermediate points of respective adjacent magnetic poles and having one ends being in contact with a fluid in the cylindrical fluid path, wherein the even number of magnetic poles are corresponding in number to the cores, to the coils, and to the electrodes, and the number is equal to four or larger.

Abstract: The technical field dealt with is that of fluid conveyance, and the invention relates to a device for selectively sampling fluid from two sections of a line which ensures great operating practicality and minimal dimensions. The solution consists of a device comprising a selecting element with a cavity associable with a syringe and comprising an appendix suitable for rotating in a seat of a fixed element to which converge three conduits, the two end conduits being connectable with the two parts of the line and the central conduit being connectable with a drain, said selecting element having two passages, each of which is suitable for establishing a communication between one of the end conduits and the central conduit, and a third intermediate passage suitable for establishing a communication selectively between the two end conduits and said cavity.

Abstract: A portable apparatus and method for collecting and testing ground water samples including a container (12) defining a chamber (14) in which a control atmosphere is established. A valve means (22) is included which is capable of bypassing water away from the chamber (14) and continuously admitting water samples to the chamber (14). A preferred method of collecting a ground water sample includes the steps of establishing a controlled atmosphere in the chamber (14), directing the flow of water into the chamber (14), collecting the water sample inside the chamber (14), and testing the sample inside the chamber (14) to prevent contamination from the air on the exterior of the chamber (14).