Abstract: An elastic covered yarn the core of which is a wrapped yarn consisting of elasthan filament yarn having polyamide, polyester or viscose filament yarn as the sheath material, and which may be covered with different materials. This yarn has advantages in its properties and in processing compared to those covered yarns, the core of which is a bare elasthan filament yarn.

Abstract: A knitted safety glove made of yarn having a core of two longitudinal strands of annealed stainless steel wire and one strand of high strength aramid fiber surrounded by an aramid fiber wrapped thereabout in one direction and a layer of nylon wrapped upon the first layer and in the opposite direction.

Abstract: Glass fiber strand is prepared from a process so that the strand can be bulked at higher processing speeds. The process involves drawing the glass fibers from molten glass, applying an aqueous treating composition to the fibers, gathering the treated glass fibers into one or more strands and collecting the glass fiber strands onto one or more packages, drying the packages, rewinding the packages onto a second, more supportive package, steaming one or more of the second packages and drying the steamed packages so that the package has a moisture content of around 1 to about 25 weight percent. The aqueous treating composition used to treat the glass fibers in forming has one or more starches, an aqueous soluble, emulsifiable or dispersible wax wherein the amount of wax in the aqueous treating composition is less than the amount of starch, a cationic lubricant and water.

Abstract: A spinning frame of the type having a main drafting zone through which two fiber bands move in spaced parallel relation for subsequent twisting into a single yarn is provided with a first pair of rollers located at the entrance to the main drafting zone, a second pair of rollers located at the exit of the main drafting zone, a pair of endless leather tapes extending about a roller in each of the first and second pair of rollers, and a third pair of rollers for delivering two fiber bands from the main drafting zone to a suitable twisting device.

Abstract: The present invention provides two-stage and three-stage fluidized bed process embodiments for burning carbonaceous solids for the generation of heat to produce motive fluids for application in combined cycle power plant systems.The finely-divided refractory solids employed in the fluidized beds may contain sorbent material to neutralize noxious gas constituents and yield a clean flue gas for venting.

Abstract: A recirculating fluidized bed furnace (FIG. 3) having a combustion chamber 4 operating at a fluidization velocity of 10 meters per second delivering combustion products to a separating section 10 with the combustion gases flowing over boiler banks 30-36 in a pass 30 and the solids particles falling to a weir chamber 14. Heat is extracted from the particles in a compartmented heat transfer bed space 20 operating at a fluidization velocity of 0.5 meters per second receiving the particles from the weir chamber 14 and discharging them to the base of the combustion chamber 4.The furnace is combined with a coal devolatilizer 60 discharging combustible gases through a burner 68 to a gas turbine 70 and char to the furnace combustion chamber 4. A compressor 72 coupled to the gas turbine 70 delivers air to an air heater 74 in the heat transfer bed space 20, which heated air is supplied to the devolatilizer 60 and the burner 68.

Abstract: A fluid compressor including a rotating impeller and apparatus inhibiting fluid surging. The surge inhibiting apparatus includes a multitude of guide vanes circumscribing an inlet of the compressor. Movement of the guide vanes with respect to fluid flowing to the compressor is effective to inhibit fluid surging. A combustion turbine including such a fluid compressor, and a vehicle powered by such an engine are also disclosed.

Abstract: A speed and load control for a combustion turbine utilized in the generation of electric power includes means for effecting a smooth transition between the isochronous and droop modes of control. The speed and load control also includes means for maintaining a constant power level during a transition from the isochronous to the droop mode of control so as to minimize fluctuations in signal frequency.

Abstract: A thruster particularly for maneuvering space vehicles is provided with a device for decomposing liquid fuel into gaseous components. It includes the decomposition chamber and a heating device downstream for further heating and decomposing the gaseous products. The heater is preferably a coiled tube disposed in the inner one of two concentrically nested sleeves, the space between them being a part of a recuperative heat exchanger. The coiled tube ends in the thrust producing nozzle while its other end is connected to the space between the nested tubes.

Abstract: A closed center, load sensing hydraulic system is disclosed which contains a primary work circuit which has priority in flow demand over a secondary work circuit. The system includes a variable displacement pump fluidly connected between a reservoir and a control valve with the primary work circuit. The primary work circuit includes a control valve which regulates fluid flow from the pump to a primary hydraulic function and which includes a feedback mechanism connected thereto. The secondary work circuit also includes a manually operable control valve for regulating fluid flow from the pump to a secondary hydraulic function. A priority valve is connected between the pump and the secondary work circuit and movable between an open and a closed position to regulate the pressure of fluid discharged by the pump.

Abstract: An open center, load sensing hydraulic system is disclosed which contains a primary work circuit and a secondary work circuit. A fixed displacement pump is fluidly connected between a reservoir and both the primary and secondary work circuits for supplying pressurized fluid thereto. The primary work circuit includes a control valve which regulates fluid flow from the pump to a primary hydraulic function and which includes a feedback mechanism connected thereto. The secondary work circuit includes a manually operable control valve for regulating fluid flow from the pump to a secondary hydraulic function. A priority valve is connected between the pump and both the primary and secondary work circuits and is movable to regulate the pressure to the primary work circuit.

Abstract: At a low part load, and at idling of a vehicle machinery it is difficult to obtain a good fuel economy and acceptable emission rates. The amount of work for driving the compressor and the auxiliary apparatuses is considerable in a gas turbine, and in view of the conditions mentioned the combustor of the gas turbine is provided with two burners, of which one is dimensioned for a fuel quantity which merely corresponds to "spare-flame" operation. An auxiliary motor is included in the machinery and keeps together with the "spare-flame" burner, the main rotor of the gas turbine running at idling and part-load. The auxiliary motor may be an electric motor.

Abstract: Combustors utilizable in a variety of sizes, configurations, and applications in which vortex induced centrifugal forces and hot gas recirculation are employed for flame stabilization. Both gas and liquid fuels can be burned, and low emission as well as other modes of operation are available.

Abstract: This invention concerns heat relief by Peltier cooling. In one embodiment Peltier cells are attached to a garment with the cold plate of the Peltier cell in intimate thermal contact with the skin of the wearer of the garment. Heat generated by the Peltier cell is dissipated to the ambient from cooling fins. Heat pipes are used to conduct the heat to the fins, or to distribute the cooling across the skin.

Abstract: A transportable self-contained life support apparatus steadily reduces in temperature whole blood collected from donors to a predetermined temperature range. The whole blood is kept live by maintaining the temperature of the blood within such range through conductive heat transfer to an adjacent coolant. The coolant, in a frozen state and having a freezing temperature just below the predetermined range, absorbs heat commensurate to/with its latent heat of fusion and precludes temperature excursion of the blood until all of the coolant has become liquid. Similarly, platelets, extracted from the blood, can be maintained at the predetermined temperature range during storage and transport. Over chilling is precluded by limiting the low temperature of the coolant to its freezing temperature and a life destroying temperature rise is self-evident by and can only occur after a complete change in the state of the coolant.

Abstract: An apparatus for charging a refrigeration system with a predetermined amount of refrigerant by weight. The apparatus includes a cylinder which is mounted on top of a strain gauge scale that is first filled from a source of refrigrant and then automatically discharged to fill a refrigeration system with a predetermined amount of refrigerant. The system includes solenoid operated valves which are automatically operated for loading the cylinder and charging the refrigeration system. A vacuum pump is also included in the circuit for placing the refrigeration system under a predetermined vacuum prior to the charging operation.

Abstract: An apparatus and method is disclosed for regulating delay periods in the operation of an air conditioning system. A speedup means is provided for a serviceman to speed up the delay intervals to avoid long waiting periods between modes of operation of the air conditioning unit. Means are provided for removing the speedup means after delay periods have occurred to prevent inadvertent operation of the air conditioning system with shortened delay intervals.

Abstract: A duty cycling switch for use with a furnace which mounts onto the exterior wall of the furnace plenum and opens and closes in response to the temperature of the plenum wall. The switch is adjusted to deactivate the burner when the plenum wall heats up to a temperature caused by the continuous operation of the burner for a predetermined period of time. The duty cycling switch acts to reactivate the burner when the plenum cools down below this temperature. A duty cycling switch for use with an air conditioner is also disclosed which mounts onto the plenum wall and opens and closes in response to the temperature of the plenum wall. It is adjusted to deactivate the compressor of an air conditioner unit when the plenum wall cools down to a temperature caused by continuous operation of the compressor for a first predetermined period of time and reactivates the compressor after the plenum wall exceeds this temperature. The furnace duty cycling switch is preferably an adjustable bimetal switch which opens on rise.

Abstract: A heat exchanger container (2) having a round or square cross-section is divided longitudinally into a boiler compartment (4) and an absorber compartment (5) by a hygroscopic partition wall (1) provided with surfaces (11) on the boiler side, respectively (12) on the absorber side. At both ends of the partition wall (1) are provided sealing elements (10) which insulate the partition wall from the container (2). Cooling vanes (3) increase the active outer surface of the container (2). A condenser (6) for liquifying the refrigerant is located after the container (2) in the flow direction. Then comes a choke member (8) intended to choke control the refrigerant. Finally there is provided an evaporator (7) of which the outlet is connected to the absorber compartment (5) of the container (2). Pipes connect the container (2) on one hand to the condenser (6) and on the other hand to the evaporator (7). This sorption refrigerating apparatus may be set in operation continuously.

Abstract: An absorption refrigeration system utilizing solar heat including an absorption cold and warm water system and a solar heat collector unit. Heating and cooling of an enclosure are performed by the absorption cold and warm water system, and the solar heat collector unit can be switched to allow warm water obtained by heating water by solar heat to flow to a low temperature heat source generator in a cooling mode and to an evaporator in a heating mode.

Abstract: An air conditioner system for an automotive vehicle is provided with a main and an auxiliary cooling unit for discharging cooling air to respective front and rear portions of the vehicle compartment. The main and auxiliary cooling units operate to control air flow amounts independently of each other. A main control switch for controlling the amount of cooling air from the main cooling unit cooperates with a pair of auxiliary cooling unit switches to control the auxiliary cooling unit. One member of the pair of auxiliary cooling unit switches is provided adjacent the driver's seat and the other adjacent the rear seat for turning the auxiliary cooling unit on and off. The auxiliary cooling unit can be controlled by either one of the pair of switches as long as the main control switch is on.

Abstract: The outdoor unit for an electric heat pump is provided with an upper portion 10 containing propeller fan means 14 for drawing air through the lower portion 12 containing refrigerant coil means 16 in the form of four discrete coils connected together in a subassembly forming a W shape, the unit being provided with four adjustable legs 64 which are retracted in shipment, and are adjusted on site to elevate the unit to a particular height suitable for the particular location in which the unit is installed.

Abstract: In a hermetically circulating, absorption type refrigerator based on a closed circulation system of constituent members comprised of a successive communication of a regenerator, a condenser, an evaporator, an absorber and a heat exchanger, refrigeration being produced by repetitions of concentration, refrigerant dilution, and heat exchange of an aqueous concentrated lithium bromide solution sealed in the circulation system, the aqueous concentrated lithium bromide solution contains at least one each of (a) an inhibitor having a boiling point higher than the solution temperature in the regenerator and (b) an inhibitor having a boiling point lower than the solution temperature in the regenerator. Corrosion of metallic materials used in a refrigerant circulation loop of the refrigerator and those in the absorbing solution circulation loop can be effectively prevented.

Abstract: In a knitting row counter, a settable member has a projection which can engage in a selected one of a number of recesses in a further member but is expelled from the recess on rotation of the settable member. A finger on the settable member engages in a groove in the further member to retain the members in assembled relation. The settable member flexes resiliently to permit the projection to be withdrawn from the recess.

Abstract: In a flat knitting machine wherein needles or jacks connected thereto, each has two butts, front and rear and wherein there is provided a space below a center cam and between a pair of raising cams in a knitting lock, there is disposed in the space a loop-receiving raising cam having a cam face adapted to act on the rear butt to raise the needle to a loop receiving path and also present therein a loop-receiving lowering cam face formed of a bottom portion of the center cam and adapted to lower the needle to the loop receiving path. Preferably, a retractable guide cam is located above the center cam and there is disposed above the guide cam a loop-transfer lowering cam having a cam face adapted to act on the rear butt to lower the needle. Further, above this loop transfer lowering cam is there retractably disposed a loop-transfer raising cam which has a cam face adapted to act on the front butt to raise the needle.

Abstract: The door of a security enclosure has boltwork and a primary lock for locking the boltwork in its thrown condition. A drill-resistant disc is rotatably mounted between the lock and the exterior of the door, and the restraining wire of a relocker passes over the circumference of the disc. If a drilling attack is made on the lock the disc will be encountered and will be rotated by the drill tip to frustrate penetration of the disc by the drill. Furthermore, if the drill is aimed at the circumferential portion of the disc which guides the relocker wire any success in penetrating the disc will sever or dislodge the wire to allow the relocker to move under the action of a spring into a position in which it provides an additional locking action in the boltwork.

Abstract: A lock for a pair of doors hung in a single door frame, usually an inner main door and an outer door which may be a storm door and usually includes glass or screen panels through which a caller may be observed and identified, the lock including a pair of bolts carried by the door frame and operable to be extended therefrom to engage sockets formed therefor respectively in the door edges to secure them against opening. The bolts are operated by a lock shaft carried in the door frame to unlock first the inner door, so that it may be opened to permit observation and identification of a caller, while the outer door remains locked, and then to unlock the outer door if desired, to permit ingress of the caller. The lock shaft may be operated from inside the doors by a manual lever, and from outside by a key mechanism.

Abstract: A locking mechanism for security doors such as safes. A mounting plate is provided for attachment to the inner surface of the door. A cylindrical activating member is mounted on a pin for rotation about an axis normal to the inner surface of the door. The activating member contains a plurality of activating fingers and mounting posts for connecting to locking pin actuating mechanisms directly or through linkages. A groove is provided in the periphery of the activating member. A pair of sliding members are mounted to the plate. One sliding member is positioned to slide into the groove to prevent rotation of the activating member. The second sliding member is adapted to slide into abutment with the first member to prevent sliding thereof. Standard lock mechanisms of the combination or pin tumbler type for use with a key are mounted to the plate and connected to the two sliding members to control their movement.

Abstract: A lockset for a door has a strike on the door frame and a latch bolt on the door panel. The latch bolt is reciprocable and is projected by a spring and preferably has a deadlatch operation. The latch bolt is retractable by rotation of an inner knob or of an outer knob. The outer knob is locked by a key lock controlling an axially movable plate engaged with the outer knob and interengageable with an outer escutcheon adjacent the outer knob. The key lock can move the plate out of engagement with the outer escutcheon and into engagement with the inner knob. A turn button in the inner knob can also move the axially movable plate.

Abstract: A lockset for use on any one of various door panels of different thickness and hinged on a door frame includes a latchbolt adapted to project into a holder on the door frame and to retract therefrom. Inner and outer knobs are rotatably mounted on opposite sides of the door panel to rotate about a common axis and relative to inner and outer escutcheons held against the panel of whatever thickness. Inner and outer spindles are engaged by the knobs and turn in the escutcheons. The spindles rotate a rectangular tube interengaged with the latchbolt for all axial positions of the knobs to provide retraction thereof. A push button in the inner knob, when latched in a depressed position, secures the outer knob against rotation by a nonrotatable engagement with the inner escutcheon. Rotation of the inner knob releases the push button from the depressed position and frees the outer knob for rotation.

Abstract: In an apparatus for forming leak-proof joints between tubes and a tube sheet by the internal application of hydraulic swaging pressure, the flow of relatively low pressure fluid from a pressure source to an intensifier is permitted or interrupted by a control valve. During a prefill period, a prefill valve causes the low pressure fluid to bypass the low pressure input side of the intensifier and flow directly to the high pressure side and then to a mandrel. Thereafter, the low pressure fluid is caused to enter the low pressure side of the intensifier to increase the pressure in the mandrel during a swaging period. A pressurization sensor, which is connected to the input and output sides of the prefill valve, contains a piston which is movable in response to the difference in the pressures at these two points to produce a termination signal which, after a delay, actuates the control signal at the end of the swaging period.

Abstract: In the method of invention a side wall of a tubular workpiece is deformed in the direction of closing the edges. From a vault thus obtained, an end face wall having a flat area in the zone of the top of the vault is preformed. The flat area is pressed inside the workpiece to form a recess by means of a pressing tool and simultaneously the end face wall is formed by means of externally rolling the workpiece, the material of the workpiece being positively transferred to the zone of bending the wall of the workpiece no matter what the distance is from the side wall to this zone. Thus, end face walls and recesses of various shapes at a wide range of dimensions may be obtained.For deforming, the workpiece is preheated to a forging temperature.

Abstract: The invention relates to a method of rotary piercing in seamless tube manufacturing under a rotary piercing process, such as Mannesmann mandrel mill process. Rotary piercing operation is carried out by employing a rotary piercing mill having a pair of cone-shaped main rolls adapted to cooperate with a plug for rotary piercing and disc rolls disposed in opposed relation between the pair of main rolls and adapted to press hollow shell on the surface thereof. In this method of rotary piercing, the main rolls have feed and cross angles designed to meet certain conditions individually and in combination. The method makes it possible to carry out rotary piercing of less hot workable and/or extremely hard-to-work materials, that is, high-alloy steel billets, without surface torsional deformation and circumferential shear deformation. Thus, it is possible to manufacture high quality tubes of high-alloy steels free from outside seams and inside bore defects.

Abstract: A roll stand arrangement contains work rolls and back-up or support rolls, the work rolls being laterally supported by hydrostatic support ledges. Within each upright or support stand of the roll stand arrangement there is provided a guide frame which is guided within a window of the related support stand together with mounting elements for the back-up or support rolls. Within the guide frame there are guided the mounting elements of the work rolls in slide elements. There are simultaneously pivotably supported in the slide elements the shaft or bearing journals of the support ledges.

Abstract: An apparatus for positioning a roll of a roll stand has respective adjustment spindles operatively engageable with the ends of the roll and rotatable about respective axes in one direction to advance the respective roll end and in an opposite direction to retract the respective roll end. A main transmission has respective rotary outputs connected to the spindles, main inputs, and secondary inputs and a relatively strong main drive has respective rotary output shafts connected to the main inputs of the main transmissions for rotating the spindles therethrough. Respective secondary transmissions have outputs connected to the secondary input of the main transmissions and inputs. Individually operable respective relatively weak secondary drives are connected to the inputs of the secondary transmissions for rotating same and rotating the spindles through the secondary and main transmissions.

Abstract: A billet centering and control guide for an entry guide for a PPM, which is of the rectilinear-tunnel type and is formed by two L-shaped portions which are hinged together about an axis parallel to the axis of the guide. The control guide can be opened essentially like a valve to allow the removal of a billet which may be trapped therein.

Abstract: An upsetter mechanism including a die set having a plurality of juxtaposed forming sections, first and second punches extractably protrudable into the respective forming section of the die set, and a punch drive mechanism for driving the punches through a hydraulic cushioning mechanism, the hydraulic cushioning mechanism including a hydraulic cylinder having a maximum diameter corresponding to the total load of the punches; a main pressurizing ram slidably fitted in the hydraulic cylinder; a punch attached to the hydraulic cylinder; and a movable pressurizing ram slidably fitted in a cylinder formed in the hydraulic cylinder of maximum diameter to cope with the load of the first punch and having a second punch attached to the fore end thereof, the movable pressurizing ram being operable independently of the main pressurizing ram.

Abstract: A press for manufacturing hollow articles by deep drawing comprising a high pressure vessel (1) accommodating a die (3) with a punch (4). A blank (14) is accommodated in an annular high pressure chamber (16) communicating with a high pressure chamber (19) of an intensifier (20). The press also comprises a device (27) for regulating pressure in the annular chamber to control pressure acting upon the peripheral portion of a blank in accordance with a preset law, an appliance (39) for setting pressure in the annular chamber is made in the form of a tracer whose profile is equidistant with the curve characterizing the alteration of pressure in the annular chamber (16).

Abstract: Manufacturing method for a tubular shell of a constant velocity universal-joint for flexibly coupling two rotary shafts, to one of which the shell is fixed at a flange thereof. The method comprises a groove and preliminary flange forming process and a flange forming process. In the former process a hollow cylindrical blank is applied pressing in a radial direction for forming plural grooves therein and forming at the same time a preliminary flange at one end of the cylindrical blank by expanding it into a funnel shape, and in the latter process the preliminary flange formed on a semi-finished article in the former process is formed into a completed flange by a flange forming die, while holding the semi-finished article in a restrained status under pressure from either side, external and internal, by means of restraining dies. An apparatus suitable for performing the method is also disclosed.

Abstract: An IC pin adjustment tool includes a pair of side arms and a center portion disposed between the side arms. The side arms are hingedly mounted on the center portion at one end thereof, and biased outwardly away from the center portion by spring means attached to the other end of the side arms. The center portion, and the portions of the side arms adjacent to the center portion, are configured such that an IC of either of two widths may be disposed on the associated one of two sides of the center portion such that the IC pins extend into gaps between the side arms and the center portion. By squeezing the side arms toward each other, the side arms force the pins toward the center portion to thereby adjust the orientation of the pins, such that they may immediately be inserted into an IC socket without further adjustment.

Abstract: Apparatus (22,22') for forming thin-wall sleeves (24) is disclosed as including a spring biaser (52) for tools (48) of the apparatus. A mandrel (36) and a tool housing (42) cooperate to mount the sleeve (24) for forming under the impetus of an actuator (54) that moves the tools (48) against the force of the spring biaser (52). Upon such tool movement, forming ends (50) of the tools form the sleeve (24) into circumferentially spaced recesses (40) of the mandrel to provide sleeve splines or teeth (56). The spring biaser (52) preferably includes a plurality of springs (92) mounted within associated spring openings (98) in the tool housing between tool slots (46) in which the tools (48) are supported for movement. In one embodiment, the forming is performed inwardly with the sleeve mounted about an internal mandrel. In another embodiment, the forming is performed outwardly with the sleeve mounted within an external mandrel.

Abstract: A method and an apparatus for forming arcuate radially-extending locking projections on the ends of pipes is disclosed, in which the pipe end is marked about its external circumference into spaced forming zones, and the projections are then formed employing one of the zone markings as an index of the location of a second zone marking spaced therefrom, the apparatus including an elevatable pipe support and a forming head provided with a male punch assembly and a female die member, the male punch assembly being operable by a power source and being located within the bore of the pipe.

Abstract: In shot peening apparatus, a device is provided for sensing shot peening intensity and the uniformity of shot flow. It is basically comprised of a detector plate mounted on a cantilevered arm; torque created at the arm mounting due to the impact of shot is measured with a transducer. The detector is mounted on a structure adapted to translate the detector through a large shot peening zone. The invention is especially suited for assuring consistency in a process wherein uniform spherical shot is gravity accelerated to impact a workpiece with uniform velocity.

Abstract: An electro-mechanical impacting device (10) for testing the bonding of foam insulation (22) to metal (26). The device lightly impacts foam insulation (22) attached to metal (26) to determine whether the insulation (22) is properly bonded to the metal (26) and to determine the quality of the bond. A force measuring device, preferably a load cell (12) mounted on the impacting device, measures the force of the impact and the duration of the time the hammer head (16) is actually in contact with the insulation (22). This information is transmitted as an electric signal (20) to other elements of the invention's associated system (not part of this invention) which are capable of conditioning the signal and evaluating it electronically in order to provide a visual display on a video screen. This allows an operator to make decisions relating to bonding and the quality of bonding.

Abstract: This invention relates to a new method and new apparatus for determining fluid mass flowrate and density. In one aspect of the invention, the fluid is passed through a straight cantilevered tube in which transient oscillation has been induced, thus generating Coriolis damping forces on the tube. The decay rate and frequency of the resulting damped oscillation are measured, and the fluid mass flowrate and density are determined therefrom. In another aspect of the invention, the fluid is passed through the cantilevered tube while an electrically powered device imparts steady-state harmonic excitation to the tube. This generates Coriolis tube-damping forces which are dependent on the mass flowrate of the fluid. Means are provided to respond to incipient flow-induced changes in the amplitude of vibration by changing the power input to the excitation device as required to sustain the original amplitude of vibration. The fluid mass flowrate and density are determined from the required change in power input.

Abstract: An automatic pipe testing unit adapted to be mounted on a goose-neck trailer and comprises a longitudinally extending rectangular tubing main trailer frame. A test fluid holding tank mounted on the frame has a screened opening to receive test fluid which is drained from each joint after it has been tested, so that the fluid can be continuously recirculated. Also included are hydraulically operated two lift arms and two pipe advance arms, the lift arms each having an integrally attached bevelled finger plate onto which a plurality of pipes can be rolled. The lift arms lift the pipes from one point to a slanted storage area on the top of the unit and herefrom automatically by operation of the hydraulic pipe advance arms, the pipe to be tested is advanced into a pipe gripping vise for testing. The hydraulically operated pipe advance arms can then be operated to eject the pipe therefrom into another area for draining the pipe of all of the test fluid so that the test fluid can be recirculated for subsequent use.

Abstract: A fuel gauge is so designed that a fuel level signal having a signal value responsive to the fuel amount in a fuel tank is averaged over time intervals which vary according to whether the liquid level of the fuel in the tank is stable or unstable and a fuel quantity is calculated and displayed according to the averaged value. The stable or unstable condition of the fuel level is discriminated in accordance with vehicle speed, the "on" or "off" position of an ignition switch or the like. Accordingly, when the fuel level is unstable, the signal value is averaged over a time interval which is longer than that used when the fuel level is stable so that the response of display to variation of the fuel level is improved.

Abstract: A device for monitoring the flatness or camber of a moving metal strip is disclosed. The device includes a cylindrical roller over which the metal strip travels, which cylindrical roller is independently supported at each end on a plate which is pivotally mounted on top of a housing for two load cells situated on opposite sides of the centerline of the strip product. The projections provided on the underside of the plate bear against the load cells in a manner whereby any difference in tension across the width of the strip may be detected as a difference in pressures exerted on the two load cells.

Abstract: Apparatus and method for analyzing gases, especially respiratory gases for oxygen and carbon dioxide content, and for measuring pulmonary functions; such comprising a detector employing thermistors forming parts of a Wheatstone bridge circuit, one of which is in contact with a carrier gas, the other with a sample of the gas to be analyzed sandwiched between carrier gas in advance of and trailing the sample, the output of the detector being sensed by a recorder and transduced into a tracing; the gas to be analyzed being passed through a column or columns of adsorbent material which selectively retains certain components of the gas and releases them in a time ordered sequence; the test thermistor having its temperature varied in accordance with the composition of the gas; the adsorptive material being selected as to its composition and geometry to bring about separation and release of components of the gas in a time ordered sequence and within a very short period of time; the gas circuit being adapted to minimi

Abstract: An ultrasonic echo-ranging system adopted to measure the level of liquid in an open channel or other liquid container. The system includes an ultrasonic transducer disposed at a fixed position directly above the liquid surface, the nature of the gaseous environment therebetween determining the velocity of ultrasonic energy propagated therethrough. The transducer is excited to emit periodic pulses which are directed along a center path toward the liquid surface and reflected to produce liquid echo pulses which return to the transducer and are detected thereby. A reference reflector at a predetermined position relative to the transducer intercepts energy from a side path in the radiation pattern of the transducer to return it to the transducer to produce reference echo pulses. Means are provided to determine the transit time of pulses along the center path, and also to determine the transit time along the side path.