Abstract: An improved drain mast assembly for a gas turbine engine is connected to an outer surface of a nacelle of the engine and has a plurality of liquid drain lines terminating within the assembly. The assembly comprises a plurality of liquid collection chambers installed within the drain mast assembly with each of the chambers coupled in liquid receiving relationship with a respective one of the liquid drain lines. Each of the chambers collect drain liquid from a respective one of the drain lines. A valve extends from each chamber for selectively draining the collected liquid from each of the chambers for identifying drain lines having relatively high drain-rates. Each of the chambers is separately removable from the drain mast assembly in one form or all chambers may be simultaneously removed in another form of the invention. Each chamber further includes a transparent view window for visually determining a volume of liquid collected by the chamber.

Abstract: A seal centering and restraining device for positioning the seals between the divergent flaps of a vectoring convergent/divergent nozzle. The device includes a restraint bar that spans between two adjacent divergent flaps and is pivotally attached to the air side of a seal and slidably secured by sliders to tracks on the adjacent divergent flaps, thereby sandwiching the adjacent divergent flaps between the seal and sliders. A positioning linkage connecting the two adjacent divergent flaps centers the seal at all nozzle operating conditions.

Abstract: A system and method to maximize fuel efficiency for a plurality of simultaneously operating engines is disclosed. The system includes means to determine the fuel consumption of the engine, measure the thrust of each engine and means to substantially equalize the ratio of the fuel consumption to the thrust between each of the engines. A pressure transducer is included to provide thrust data supply to each of the engines to a microprocessor, and a microprocessor is run to substantially equalize the ratio of the fuel consumption to the thrust to provide an increased fuel efficient system.

Abstract: Secondary air is supplied to a position upstream of a catalyst disposed in an exhaust passage of an engine. An oxygen sensor is disposed between a secondary air supply portion of the exhaust passage and the catalyst. The supply amount of the secondary air is feedback controlled so that the oxygen concentration in the exhaust gas detected by the oxygen sensor approaches a target value corresponding to a theoretical air/fuel ratio. A second oxygen sensor for air/fuel ratio control is disposed upstream of the secondary air supply portion. Air/fuel ratio feedback control adjusts the air/fuel ratio of air entering the engine so that the oxygen concentration at the second oxygen sensor approaches the same target value as at the other oxygen sensor.

Abstract: A method for treating engine emissions and a device for treating engine emissions and dampening engine noise are provided. The invention provides for multiple zones of reaction so as to treat reducible emission components by providing a low oxygen, relatively cool reducing zone and also to treat oxidizable emission components by providing a relatively high oxygen, hotter oxidizing zone. A feature of the invention includes a heating means situated adjacent to or embedded into an oxidizing catalyst or an oxidation zone of a three-way catalyst.

Abstract: A compact and light flow dividing pump is disclosed. The pump includes a housing having an end plate attached to one end thereof. The end plate has a fluid suction port and a pair of fluid discharge ports. A pump mechanism is provided in the housing for receiving fluid through the suction port and discharging the received fluid through the discharge ports. A plurality of discharge passages are formed in the end plate between the pump mechanism and the discharge ports. A control valve is also provided in the end plate to control the flow rate of fluid in the discharge passages.

Abstract: A load sensing control system for a hydraulic machine sets a variable target differential pressure between a delivery pump pressure and a load pressure of an actuator. A control factor is determined that becomes larger as the deviation between the target differential pressure and the actual differential pressure is increased, and that becomes smaller as the differential pressure deviation is decreased. The control factor also becomes larger as the target differential pressure becomes smaller. The target displacement volume for the hydraulic pump is based on the differential pressure deviation, which is calculated from the target differential pressure and the control factor.

Abstract: A hydraulic drive system for civil-engineering and construction machines has reverse motion check valves and a regulator for selectively limiting outflow of the hydraulic fluid through the reverse-motion check valves. This prevents unusual operation of the valves in certain environments, such as in a low-temperature environment and in an environment where the civil-engineering and construction machine is operated on an incline.

Abstract: Methods and apparatus for controlling a conditioned space to a predetermined set point temperature, utilizing a supply of cryogen. Cryogen is drawn from the supply in a flow path to provide a cooling mode via a heat exchanger disposed in the flow path. A vapor motor in the flow path, downstream from the heat exchanger, drives a fan which moves air between the conditioned space and the heat exchanger. Heat is applied to the cryogen downstream from the heat exchanger, after all cooling modes have been performed, to provide the desired fan horsepower, without interfering with a cooling cycle. A by-pass flow path selectively directs cryogen directly to the vapor motor, by-passing the heat exchanger, to provide air circulation in the conditioned space when the temperature of the conditioned space is satisfied.

Abstract: A regenerative type air conditioning equipment in which the available concentration range of a heat accumulating liquid is widened, and the quantity of the heat accumulating liquid to be stored is decreased, so that the size of the equipment is reduced, with the conditioning equipment comprises a concentration difference regeneration device which, at least, cools a medium fed to an air conditioner, using a condensate liquid and a concentrated liquid produced by vaporizing the heat accumulating liquid, and a heat pump device which cools a coolant due to adiabatic expansion. The concentration difference regeneration device includes a container with a chamber for storing the condensate liquid, a spray nozzle which sprays the condensate liquid into the condensate liquid chamber, and an evaporator which vaporizes the sprayed condensate liquid under a low pressure.

Abstract: An air conditioning system includes a compressor which is reversed in order to switch from a heating mode to a defrost mode, or in order to switch between heating and cooling modes. Prior to being reversed, the compressor is automatically reduced to a slower speed greater than zero for a predetermined time period to minimize damage and noise when reversal occurs. The compressor is reversed while at the slower speed when switching the system to a defrost mode. When switching between heating and cooling modes, the compressor speed is first reduced to the slower speed for the first predetermined time period and then to zero speed for a second predetermined time period, before the compressor is reversed.

Abstract: A refrigerant handling system that includes a closed vessel for storing refrigerant and an apparatus for determining quantity of air captured within the vessel. A first sensor is operatively coupled to the vessel for providing a first electrical signal as a function of air/refrigerant vapor pressure within the vessel, and a second sensor is operatively coupled to the vessel for providing a second electrical signal as a function of air/refrigerant vapor temperature within the vessel. A microprocessor-based controller has internal memory in which electronic indicia is stored for relating saturation pressure to temperature for multiple types of refrigerant. This stored electronic indicia is employed in conjunction with the first and second sensor signals to determine quantity of air within the vessel as a function of a difference between pressure indicated by the first sensor signal and the saturation pressure indicia at the temperature indicated by the second sensor signal.

Abstract: Low charge detection for a refrigeration system is accomplished using a differential pressure sensor which detects superheat at the evaporator exit. The differential pressure sensor includes a casing having a reference chamber containing a reference charge of refrigerant. A pressure responsive snap member is disposed in the casing so as to have one side exposed to the reference chamber and another side exposed to the exit pressure of the evaporator. The snap member is normally biased into a first position but snaps to a second position when the pressure differential across it exceeds a predetermined level. When a low charge condition exits, the evaporator exit will exhibit superheat. Heat conduction through the casing raises the temperature, and thus the pressure in the reference chamber. Thus the pressure differential which causes the snap member to snap to the second position is created.

Abstract: In a method for calculating torque for a variable capacity type compressor provided in a refrigeration circuit and driven by an engine to compress and discharge refrigerant to be circulated through a heat exchanger in the refrigerant circuit, a rotational speed of the compressor is calculated, a quantity of refrigerant discharged from the compressor and pressure of refrigerant in high-pressure side are calculated, a capacity of the discharged refrigerant during operation of the compressor is calculated based on the calculated discharged refrigerant quantity and the calculated rotational speed, and the torque is calculated based on the calculated refrigerant pressure and the calculated capacity.

Abstract: An automobile condenser electric fan controller, which includes a high pass filter, an inverted comparator, and a relay, the inverted comparator comparing the signal obtained from the high pass filter with a reference DC level signal made according to predetermined critical speed and then providing a high potential or low potential output according to the comparison result, whereby the relay is controlled to turn on the automobile's condenser electric fan as the output of the inverted comparator and the output of the automobile's compressor both are at high potential; the relay is controlled to turn off the automobile's condenser electric fan as the output of the inverted comparator and the output of the automobile's compressor both are at low potential, or either one is at high potential while the other is at low potential.

Abstract: An air conditioner housing employs a fluid manifold operative through a support rod and lift cup to effect fluid flow through an associated fluid valve into the manifold to effect fogging mist of the fluid to be directed upon the condenser coils to enhance cooling efficiency of the air conditioner unit in use.

Abstract: A refrigerant flow switching device for alternately conveying refrigerant from a high pressure and a low pressure evaporator to a compressor of a refrigeration system, and a refrigerator using such a refrigeration system, includes a refrigerant flow switching valve for alternately conveying refrigerant from the high and low pressure evaporators to the compressor. Said switching valve is controlled by a pressure switch that utilizes the pressure difference between the refrigerant from the high pressure evaporator and that from the low pressure evaporator to cyclically open or close a switch assembly, moving the switch between low and high pressure positions.

Abstract: A float-type refrigerant control device meters the flow of saturated refrigerant liquid condensate to a subsequent stage from an outlet of a sump in a refrigerant condenser. A float in the form of a metal shell open at the bottom is slidably positioned on an upright, generally cylindrical standpipe which is mounted at the outlet of the sump. A metering sleeve situated within the standpipe is joined to the float for axial travel with the float. One or more metering slots penetrate the standpipe near its lower end, and these are uncovered by the sleeve as the float rises to permit the liquid to flow out through the sump outlet. A vapor injection duct supplies refrigerant vapor from a high pressure source to the float to keep the same replenished with vapor, thereby maintaining a positive buoyancy relative to the saturated refrigerant liquid condensate in the sump.

Abstract: An evaporative cooling system for mounting on the roof of a vehicle in which the sole source of water supply for the evaporative media in the system is contained in a low-profile housing mounted above the roof line of the vehicle.

Abstract: A refrigerator includes a freezing compartment and a refrigerating compartment located therebelow. A front door to the refrigerating compartment carries vertically spaced shelves for storing food. An air path extends from the freezing compartment to the respective shelves for permitting cold air from the freezing compartment to descend into the shelves to maintain an acceptably cool temperature in the shelves.

Abstract: A portable cooler chest is disclosed having a collapsible storage bin for nonperishable items and wheels specially adapted for rolling on sand or soft soils. The collapsible storage bin includes foldable side panels and may be integrated with or separable from the lid of the chest. A cover is provided to cover the erected storage bin, or to enclose the collapsed storage bin between the cover and the lid. Pivotable rolling surface segments are hinged to the wheels such that the segments may be pivoted outwardly to augment the width of the rolling surfaces. The wheels are rotatably connected to the lower extent of the enclosure by pivoting spindles. The wheels may be pivoted under the bottom of the enclosure to prevent rolling of the chest and to place the wheels out of the way. Stowable retainer disks maintain the segments in the outwardly pivoted position. The wheels may be removed from the chest.

Abstract: The container with a thermally insulated enclosure (100) is equipped with a refrigerating unit (20), with a pumping unit (30), with a control unit and with an electrical power source. This container also comprises a disposable aseptic detachable transporting assembly (60) together with a reservoir bag for a physiological fluid, a collector bag for gathering this fluid, a vessel for transporting an organ with a device for suspending the organ, a fluid dispensing element and pipework (66) for connecting this reservoir bag, dispensing element, vessel and collector bag by passing via the pumping unit. Application for the preservation and transporting of live organs to be transplanted.

Abstract: An embroidered lace bracelet is provided wherein the bracelet includes a fastening means for fastening the ends of the bracelet together and the fastening means is embroidered as part of the bracelet during the embroidery of the bracelet. In a preferred embodiment, the bracelet is adapted to receive a conventional buckle means while in other embodiments the bracelet may be passed through a loop embroidered into the bracelet, during the embroidery of the bracelet and tied-off, or passed through a loop extending from the bracelet, embroidered during the embroidery of the bracelet, which loop must be folded against the bracelet and an end of the bracelet passed therethrough to fasten the bracelet about the wrist of the wearer.

Abstract: A method and apparatus for mounting precious or semi-precious stones comprises a casting of pliable metal. The housing is formed into a pair of opposed channel-shaped legs which can be squeezed together to encircle and hold the girdle portion of the stone. To facilitate linking of two or more stones, one end of the mounting is provided with an ear having an aperture pass therethrough. The other end of the mounting is provided with a post. The post is securable to the free end of the opposed leg of the first mounting. If linking two mountings is desired, the post of a first housing passes through an aperture of an adjacent housing before the post is welded to the free end of the opposed leg.

Abstract: A process for bending a glass sheet according to which the glass sheet is heated in horizontal position until its bending temperature is reached and is brought into contact with an upper bending form by a force of a pneumatic nature. A fluid barrier is generated at the periphery of the glass sheet, the fluid barrier limiting the entry and exit of air near the upper bending form.

Abstract: A tubular textile insert for strengthening material is made of a stack of successive layers of parallel and interlinked threads. More particularly, there is a first-direction layer defining a cylindrical shape and form by several parallel threads arranged in a spiral relative to the central axis of the cylindrical shape. A second cylindrical layer is also formed in a cylindrical shape by several parallel threads arranged in a spiral, but at a pitch in the opposite direction to the spiral pitch of the first layer. The cylindrical shape defines a plurality of generating lines that are angularly spaced apart from one another and extend generally parallel to the central axis of the cylindrical shape. Several binding threads are arranged parallel to the generating lines and link the threads of the first and second layers together without piercing or crossing those threads of the first and second layers.

Abstract: The single-cylinder circular knitting machine has a vertically arranged needle cylinder with a skirt defining a plurality of axial grooves. Each groove slidingly accommodates a needle. A platen is arranged coaxially above the needle cylinder, and a plurality of radial grooves is defined therein. Each one of the radial grooves accommodates a hook which is movable by the action of actuation cams which can be engaged, during rotation of the platen about its axis, with a heel of the hooks, from a position in which the hooks are retracted in the platen to an extraction position, and vice versa. The machine is provided with a hook locking device which is arranged proximate to the platen and is controllably engageable with the hooks to keep them in the retracted position in the platen.

Abstract: Knitted fabric produced by a circular knitting machine passes downwardly to a fabric winding unit that rotates synchronously with the knitting unit and that includes fabric delivery rolls and a fabric winding shaft that are driven by rotation of the unit. The winding unit also includes a fabric guide that guides the fabric onto the shaft, a fabric cutter that cuts the fabric after a preselected quantity of it has been wound upon the roll, a fabric receiving table, and a thruster that removes the wound fabric from the center shaft and discharges the fabric onto the fabric receiving table and thereafter from the machine. A central processing unit and associated sensor and switch elements monitor and/or control operation of the knitting machine and winding unit.

Abstract: An automatic washing machine having an improved structure. The sprinkling member for repeatedly sprinkling the washing water into the dehydrating tub comprises a removable washing tub lid, an adapter for permitting the washing water to be fed therethrough and a guide member forming, in cooperation with the washing tub lid, a sprinkling nozzle through which the washing water is sprinkled into the dehydrating tub. The lint filter filters off lints generated in the washing cycle and permits the filtered lints to be automatically removed therefrom so as to be drained off the washing machine along with the drained water. The circulation pump circulates the washing water and is connected to the washing tub and the sprinkling member in such a manner that it permits the washing water in the washing cycle to be drawn up to the sprinkling member through the lint filter and also permits the used washing water in the draining cycle to downwardly pass through the filter so as to be drained off the washing machine.

Abstract: A washing machine is arranged to reuse and accordingly recycle rinse water for a laundry procedure, wherein a plurality of solenoids are operative and in cooperative relationship relative to one another to arrange for initial directing of rinse water into a recycling tank and subsequently directing the rinse water from the recycling tank back to the washing machine tub permitting subsequent drainage of the rinse water subsequent to its reuse.

Abstract: A door locking mechanism of the chain guard type which can be used as a dead lock and in a manner similar to currently popular regular safety chain type door locks. The mechanism comprises a bolt keeper formed with at least one elongated slot terminating into at least one enlarged opening. A bolt matched in size and shape cooperates with this keeper and is inserted into the keeper through the opening and captively slides in it after insertion. The mechanism further includes a key operated lock having a lock member that can be secured to and released from the lock. A chain interconnects the lock member and the bolt and forms therewith a chain assembly having an operative length which is selectable between at least two positions. In one of these positions, the bolt can be removed from the keeper without freeing the lock member from the lock.

Abstract: A cylinder lock is disclosed having significant resistance to damage or tampering. The cylinder lock comprises a cam provided on the key cylinder; and a pair of pins disposed radially slidably in openings provided in the sleeve rotatably disposed within a casing. The pins are moved within the openings of the sleeve by the cam on the key cylinder which is rotatably positioned within the sleeve when the key cylinder is turned by a proper key independently of the sleeve to a predetermined angle, as tumblers provided within the key cylinder are disengaged from the sleeve. Then, the pin comes into engagement with and is rotated with the connector together to unlock the lock device.

Abstract: It is an object to provide a bending angle detecting system for a press brake which can perform high precision bending process without employing a special die, The bending angle detecting system includes a sensor (20) provided on a back stop (8) for determining a bending position of a workpiece (7) to be subject to the bending process, and means for controlling a lower limit position of a punch (6) based on an angle signal detected by the sensor (20).

Abstract: A spring manufacturing apparatus for reducing the time from the beginning to the completion of the manufacturing of a spring having a flat end surface and for manufacturing a large amount of springs at a high-speed. Feed rollers 3a and 3b supply wire material 1 to point tools 4a and 4b. When a single spring is formed, laser output portion 7 is moved in an X direction by the spring pitch length and laser irradiation to the wire material 1 is started. At the same time, feed rollers 3a and 3b feed the wire material for one coil of spring to be manufactured.

Abstract: A pinch roll and shear combination for use in a mill, such as a reversing hot strip mill. The pinch roll and shear combination includes a stationary frame provided with a rotatably mounted lower roll and stationary lower blade adjacent the lower roll. A rectilinearly movable carriage is mounted on the frame with a piston for moving the carriage. An upper roll is rotatably mounted on the carriage and cooperates with the lower roll to form a pinch roll. An upper blade assembly is mounted on the carriage and cooperates with the lower blade to form a shear.

Abstract: Bending-shaping machine for sections with a bending unit (12) located downstream of an assembly (14) that draws and/or straightens sections (15), a shearing unit (11) being interposed, in which machine a drawing unit (13) is comprised downstream of the bending unit (12) and on the same axis as the section (15) and has a first normal working position (13N) and a second downwardly retracted position (13S), the bending unit (12) having a third raised working position (12A) with a section (15) positioned above the shearing unit (11) and above the assembly 14) that draws and/or straightens sections (15).

Abstract: A stainless steel exposure chamber utilizes either a gas cylinder standard or a permeation tube standard to generate the required test atmosphere. The concentrations of the contaminants in the chamber can be varied from lower parts per billion (ppb) to high parts per million (ppm) levels. The system is capable of testing several types of industrial hygiene samplers at the same time, under the same chamber conditions and at different orientations of the samplers. The chamber is also useful for the development and verification of industrial hygiene air-monitoring methods.

Abstract: An apparatus for verifying the calibration of a flow meter contains a flow sensor assembly which has a flow tube defining an axial fluid path through the flow sensor assembly; an upstream temperature sensor in thermal contact with the flow tube; a downstream temperature sensor in thermal contact with the flow tube, the two sensors being operationally connected to a means for producing an output in response to a temperature difference between the first and second sensors; and means for asymmetrically transferring heat to the first and second temperature sensors independently of fluid flow through the flow tube. The calibration of the flow meter's thermal and electronic systems is verified by measuring the flow meter's output in response to a first asymmetric heat transfer to the upstream and downstream temperature sensors when the flow meter is calibrated.

Abstract: For measuring the air charge of a plastic component for a low-pressure multicomponent foam system, the gas-charged plastic component is admitted into a measuring chamber. The gas pressure of the plastic component displaces a measuring piston in the measuring chamber and the displacement distance of the piston is a measure of the gas charge.

Abstract: A method of measuring the flow and composition of a fluid or mixture of fluids through a system by determining the temperature, pressure and speed of sound in the fluid or mixture of fluids in the system and calculating the flow, molar density and average molecular weight of the fluid from the equation: ##EQU1## wherein: ##EQU2## c=speed of sound P=pressure of the fluidT=temperature of the fluid.rho.=molecular density of the fluidM=average molecular weight of the fluid.phi.=velocity potentialt=time.

Abstract: An apparatus, and corresponding method, for directly measuring air-fuel ratio of a combustion process, in an internal combustion engine is described. The apparatus includes a first electromagnetic wave sensor (105) that provides a first signal (107), representative of light intensity emitted at a first wavelength, and a second electromagnetic wave sensor (115) that provides a second signal (117), representative of light intensity emitted at a second wavelength. A ratio circuit (111, 121, 125) combines an integral of the first signal (107), and an integral of the second signal (117), and provides an air-fuel ratio signal, (127) indicative of the air-fuel ratio during the combustion process.

Abstract: A method and apparatus for selective detection of gases and vapors uses paramagnetic and electric dipole moments. An inhomogeneous magnetic field (31, 32, 33, 33') or an inhomogeneous electric field (41, 42, 43, 43', 44, 44') through the gas sample causes molecule enrichment in the acoustically sensitive range (34) of an ultrasonic resonator (1). The ultrasonic resonator has mutually opposed ultrasonic transducers operating as a transmitter (2) and a receiver (3). Because of the change in acoustic velocity, the molecule enrichment causes detuning of the ultrasonic resonator (1) and hence a change in signal at the receiving transducer (3). The method is particularly sensitive to the detection of oxygen.

Abstract: A method and apparatus for nondestructively testing sealed containers to proof test for seal leaks present in one or more container seals formed between mating parts of a container. The apparatus preferably includes a container rest or support assembly which holds a container being tested. The container support can advantageously include two corresponding testing head members which are movably mounted on a frame to clamp peripheral portions of the container to form a secondary seal outward of the primary seal which is being tested for leakage. The secondary seal creates a test chamber defined within marginal edge portions of the container which is adjacent the primary seal for applying a testing pressure thereto. Some of the preferred embodiments include a passage forming device for forming a testing fluid supply passage into the test chamber. The passage forming device can be an injection probe which forms an opening and injects a pressurized testing fluid into the test chamber.

Abstract: A method is provided to determine the concentration of an amorphous material such as blast furnace slag in a slurry such as drilling fluid, completion fluid fluids. A sample is annealed at a temperature between about 800.degree. C. and about 1000.degree. C. for a time period of about six hours to form crystals from the amorphous material, and the sample along with a known amount of a standard is then analyzed by X-ray diffraction. This method is particularly useful in determining the amount of blast furnace slag in a drilling fluid prior to conversion of the drilling fluid to a wellbore cement slurry by addition of additional blast furnace slag.

Abstract: An apparatus for determining the length and swing weight of a golf club having a shaft and a head, the head having a sole, there being a top at the end of the shaft remote from the head comprising a longitudinally lengthwise elongated frame; first structure on the frame for supporting the club shaft to extend generally longitudinally; second structure on the frame to contact the shaft top at a first locus and to contact the head sole at a second locus, whereby the club length "1" can be measured between the first and second loci; and third structure adjustably movable relative to the frame to support the shaft at a third locus proximate the determinate center of gravity of the golf club.

Abstract: The durability of extruded, uncured animal feed pellets is measured by disintegrating the pellets in a test chamber by means of a rotating blade powered by an electric motor. During the test, the rotating blade is maintained at or near a constant rate of rotation and the time over which an increase of power is necessary to drive the blade at constant rotation is sensed to determine the durability of the pellets.

Abstract: A device for measuring the amount of fluids absorbed by surgical sponges. The sponges are placed in a receiving cylinder. A flexible diaphragm at the bottom of the cylinder flexes or deflects from the weight. This deflection displaces a fluid in a base unit. The fluid is displaced into a graduated cylinder. The cylinder is graduated in simple volume units or can include compensation for the sponge weights. A counter is included which allows the number of sponges being measured to be counted.

Abstract: The invention provides a method for determining the orientation of a wellbore relative to stress fields within a formation through analysis of pressure climb data during a test fracturing operation. The test fracturing operation may be formed in a plurality of wells having a known angular relation to one another in a given formation. A known angular or azimuthal relationship between the wells may be correlated with the derivative of the pressure decline proximate the relief in pressure area to define maximum azimuthal stress field and a minimum azimuthal stress field in the formation.

Abstract: The present invention relates to a shape detecting roll rotatable for supporting a traveling rolled material over the width thereof to detect the pressure of the rolled material from portion to portion widthwise thereof and detect the shape of the rolled material by processing the detected pressure by calculation. The roll comprises a plurality of disks (2) arranged axially of the roll concentrically with one another and each having a pressure sensor (1) incorporated in its peripheral portion, a clearance (11) being formed between the side surfaces of peripheral portions of the adjacent disks (2) for preventing the interference between the peripheral portions. The side surfaces of the disk peripheral portions (10) forming the clearance (11) are activated by a reverse electrolytic treatment and thereafter coated with a corrosion-resistant plating.

Abstract: An arrangement for achieving reliable communication of perceived attitude information from the test subject in an environmentally controlled spatial disorientation study. The communications system includes a talking with the hand protocol wherein the orientation of the test subject's opened hand is sensed upon command from test monitoring persons. Orientation of the test subject's hand is remotely sensed by way of a three-axis of rotational freedom transducer apparatus in which the test subject's hand is suspended in a manner providing minimal orientation feedback to the test subject. Use of the described system includes a selection of additional physiological influencing environmental inputs for the test subject including visual and audible stimulus information.