Abstract: A timekeeping instrument is disclosed which is suitable for teaching a new system of timekeeping, namely, decimal time. By decimal time is meant the division of a day into decimal components rather than the conventional division of the day into hours, minutes and seconds. The teaching instrument disclosed has a single hand which corresponds to the hour hand of a conventional clock and the dial or face of the instrument bears indicia of the normal hourly divisions, that is, the twenty-four hours in a day. The face of the teaching instrument also bears indicia of the decimal divisions of the day. The face may also be provided with a digital display which presents a readout in decimal form of the precise time of day, and the day of the year. Another timekeeping instrument is disclosed which is suitable for timekeeping in decimal time. The instrument disclosed has a single hand and a dial or face having circumferentially disposed decimal divisions.

Abstract: The invention contemplates a single machine comprising two different wire feed systems and two different link-forming counter-pliers systems, each unique to a preselected different link size and/or shape, and a shuttle-borne counter-pliers unit is caused to cooperate, in a preselected program pattern, with one or with the other of the pliers systems (and associated wire-feed system), whereby the cumulative chain assembly of differently sized and/or shaped links may be developed in accordance with the pattern of shuttle operation.

Abstract: At least two gas combustion tubes disposed in an end-to-end relationship provide an elongate combustion chamber closed at both ends. A fuel mixture admitted alternatively into each closed end is ignited for generating positive pressure pulses traveling from one end of the chamber to the other. The combustion energy at one end compressed the fuel mixture from the other to permit ignition. A standing wave thus is formed having a pressure anti-node at each of the closed ends. The combustion chamber length is fixed relative to the frequency of the alternating ignitions to produce in the chamber a standing wave having an even number of quarter wave lengths with pressure anti-nodes and velocity nodes at its ends. The wave form thus has a pressure node and velocity anti-node at its mid-point. Combustion gases are discharged at this mid-point to a storage reservoir and, from the reservoir, to the propulsion turbine.

Abstract: An electromagnetic reactor engine system is disclosed wherein hydrogen and chlorine are conducted into a reactor and are combined with controlled explosive violence when exposed to electromagnetic radiation. Atmospheric oxygen is used as a control medium to regulate the energy given off by the reaction. The gases thus formed drive a turbine assembly, the output of which powers a suitable utilization device. The spent gas, hydrogen chloride, is converted to hydrochloric acid in a gas-water reactor when exhausted by the turbine. The hydrochloric acid is fed to a hydrochloric acid electrolysis cell for recycling to hydrogen and chlorine. Various means are provided for supplying the initial quantities of hydrogen and chlorine to the reactor to begin the cycle.

Abstract: A steam power plant equipped with a pressure-fired boiler which supplies steam to a turbine group includes a charging group for the boiler operating at high pressure ratios comprising a compressor driven by a gas turbine for supply fuel combustion air, the gas turbine being driven by combustion gas discharged from the boiler such that the heat content of the discharged combustion gas is substantially completely consumed in the turbine and the power delivered by it to the compressor. A governor in the live steam feed line from the boiler to the steam turbine group provides a signal by way of a primary control system that (1) regulates fuel flow to the boiler, (2) adjusts the compressor blading and (3) regulates a speed governor for the charging group, and a secondary control system provides a signal dependent upon the position of the speed governor that serves to regulate a bypass at the gas side of the boiler and therefore the amount of combustion gas delivered to the gas turbine.

Abstract: A fuel control system has a main metering device and a flow limiting throttle valve arranged in series, and a spill valve responsive to a pressure drop within the system, for maintaining this pressure drop constant, the arrangement being that when the throttle valve is fully open the spill valve is responsive to the pressure drop across the metering device only, and in all other conditions of the throttle valve the spill valve is responsive to the total pressure drop across the series arrangement of the metering device and throttle valve.

Abstract: A double bypass, variable cycle gas turbofan engine is provided with a variable area bypass injector which varies the area through which the inner bypass stream is injected into the outer bypass stream. The bypass injector comprises an upstream variable area, double bypass selector valve, the position of which determines whether the engine will operate in the single or double bypass mode, and a downstream static pressure valve which defines an optimum flow path for injecting the inner bypass stream into the outer bypass stream. The ability to vary the area through which the inner bypass stream is injected into the outer bypass stream permits the static pressure valve to operate as an ejector and permits control of the two bypass air streams through creation of a static pressure balance at the exit of the variable area bypass injector.

Abstract: A thrust reverser is provided for use with an asymmetric aircraft gas turbine engine exhaust nozzle. The thrust reverser includes a movable aerodynamic flap downstream of the asymmetric nozzle casing which is rotatable about one pivot in order to effect in-flight thrust vectoring through deflection of the exhaust stream, and which is also independently rotatable about another pivot to effect thrust reversing. In the reverse thrust mode, the leading edge of the flap is immersed into the exhaust stream, thereby splitting the stream into two portions, one of which is deflected upward and forward by a turning vane incorporated into the leading edge of the flap, and the other portion of which is deflected downward and forward by a hinged lip connected to the flap trailing edge. The thrust reverser thus permits the exhaust stream to be ejected in the vertical plane to produce reverse thrust without an accompanying pitch moment even though the exhaust nozzle is not symmetrical in the vertical plane.

Abstract: A secondary air supply pipe line is opened in the exhaust pipe of an internal combustion engine on the upstream side of an exhaust gas reactor which is mounted in the exhaust pipe, and an air-fuel ratio sensor for detecting the air-fuel ratio of exhaust gases is mounted in the exhaust pipe on the downstream side of the portion where the secondary air supply pipe line is open. An air flow control valve for on-off controlling the flow of air in the secondary air supply pipe line is operated in accordance with the output signal of the air-fuel ratio sensor.

Abstract: A system for controlling secondary air supply from an engine-driven air pump through a supply line into the engine exhaust manifold has a control valve with air inlet and outlet ports and a slidable, spring-biased valve seat member defining main and auxiliary air release openings. A first valve member is movable by a valve actuator to control the communication between the air inlet and outlet ports and the main air release opening. A second valve member is resiliently urged by a second spring against the valve seat member to control the communication between the auxiliary air release apertures in the valve seat member and the air release port. The valve actuator has first and second air pressure chambers connected to the secondary air supply line upstream of the secondary air control valve. The first control chamber is connected to the engine intake system.

Abstract: The drawings illustrate a cooling system for use with a torque converter assembly and a radiator containing a coolant. The cooling system includes a plurality of circumferentially spaced cooling fan blades formed on the outer surface of the torque converter housing for rotation therewith, and opening means cooperating therewith. A shroud having speed responsive diverter means associated therewith is operatively connected at one end thereof to the opening means and mounted at the other end thereof adjacent a face of the radiator for cooling the coolant therein by communicating air toward or away from the radiator depending upon whether the fan blades are used as a blower or a suction device in particular vehicular applications.

Abstract: A gearless split torque hydromechanical transmission with regenerative braking and engine starting capabilities comprising two hydraulic pumps tied together by a one-way clutch.

Abstract: A motor comprises a rotor supported to rotate freely about its longitudinal axis while the axis is confined to an elastically bowed configuration by internal or external means. Heat, cold or other stress inducing means applied to the side of the rotor causes local internal stresses that cause the rotor to rotate in the direction that allows relaxation of the induced stress.

Abstract: Apparatus for causing a solar energy collector to constantly follow the sun by using solar radiant energy to differentially heat fluid-containing reservoirs to cause differential vaporization and shifting of fluid to rotate the apparatus. Automatic morning orientation is included by providing the easterly reservoir with a faster rate of cooling than the westerly one thereby causing shift of fluid from westerly to easterly after sunset resulting in inclination toward the east by sunrise.

Abstract: A tandem master cylinder assembly for use in split-type hydraulic brake systems of an automotive vehicle, comprising a fluid reservoir, a cylinder body having a cylinder bore communicable with the fluid reservoir through two ports formed in the cylinder body, primary and secondary pistons axially slidable as a single unit in the cylinder bore, a floating piston axially movable within the secondary piston and forming, jointly with the primary and secondary pistons, primary and secondary pressure chambers which are variable in volume depending upon the axial positions of the primary and secondary pistons relative to the cylinder body and the axial position of the floating piston relative to the cylinder body and to the secondary piston, and means to limit the distance of travel of the floating piston relative to the cylinder body.

Abstract: A drive apparatus incorporating a rotor rotatably received within the hollow interior of a cylindrical box which is in turn rotatably received within a cylindrical chamber defined within a casing. The rotor is eccentrically positioned within the concentric box and chamber with the rotor including a plurality of selectively extensible and retractable segments for selective engagement with the interior of the cylindrical box upon a rotational driving of the rotor in response to the introduction of pressurized fluid.

Abstract: Cold ammonia, preferably cold liquid anhydrous ammonia preferably at substantially ambient or atmospheric pressure, is applied (1) to the soil as a fertilizer or (2) to feed grains, forages and anaerobically fermentable plant material to supply thereto and provide therein non-protein nitrogen (NPN).

Abstract: The present invention relates to a method of and a cryogenic installation for distributing gases.From a storage tank at low pressure, successive portions of cryogenic liquid are withdrawn to an enclosure, which is isolated by closing a valve. After this, a further valve is opened, the effect of which is to cause the pressure in a receptacle to rise to the high distribution pressure and to allow the gas concerned to condense to a certain degree so that said enclosure is filled with liquid under pressure. The liquid evaporates partially at the periphery and is thus transferred to a heater and from there to a buffer container.The invention is applicable in particular to the distribution of oxygen, nitrogen and argon under pressure.

Abstract: A cryogenic freezer is disclosed for embrittling scrap material, such as random size pieces of automobile tires, prior to fragmentation of the embrittled scrap material in an impact mill. The freezer includes a product discharge gas lock which is designed to minimize the loss of cryogenic refrigerant while, at the same time, accomodating unusually large pieces of scrap material.

Abstract: An air conditioning system for an enclosed space including a jointly driven compressor and expander of the positive displacement type each having an inlet port and an outlet port with a primary heat exchanger connected between the compressor outlet port and expander inlet port and a secondary heat exchanger connected between the expander outlet port and the compressor inlet port to complete a closed loop having a charge of air and with one of the heat exchangers being thermally coupled to the enclosed space. Ambient air is injected into the closed loop to raise the pressure in the secondary heat exchanger to substantially above the atmospheric level to increase the heat rate of the system. Alternatively air is bled from the loop to reduce the pressure in the secondary heat exchanger thereby to decrease the heat rate of the system.

Abstract: An air conditioning system for an enclosed space which includes a compressor and expander having inlet and outlet ports with a primary heat exchanger connected between the compressor outlet port and the expander inlet port and a secondary heat exchanger connected between the expander outlet port and the compressor inlet port to complete a closed loop having a charge of air, one of the heat exchangers being thermally coupled to the enclosed space. A pump is provided for injecting air into the loop to increase the pressure therein thereby to increase the heat rate of the system. Preferably the pump is used for both injecting air into the loop and bleeding air from the loop under the control of a thermostat for maintenance of a set temperature; however, a simplified form of the invention employs constant bleed. In a more elaborate form of the invention pressure follow-up is incorporated in the control to avoid any tendency toward overshoot.

Abstract: An air conditioning system for an enclosed space including a jointly driven compressor and expander of the positive displacement type each having an inlet port and an outlet port with a primary heat exchanger connected between the compressor outlet port and expander inlet port and a secondary heat exchanger connected between the expander outlet port and the compressor inlet port to complete a closed loop having a charge of air and with one of the heat exchangers being thermally coupled to the enclosed space. Ambient air is injected into the closed loop to raise the pressure in the secondary heat exchanger to substantially above the atmospheric level to increase the heat rate of the system. Alternatively air is bled from the loop to reduce the pressure in the secondary heat exchanger thereby to decrease the heat rate of the system. In an alternate embodiment a source of pressurized air is provided, preferably in the form of an accumulator, with valving to feed air from the accumulator into the loop.

Abstract: An air conditioning system for an enclosed space employing a unitary compressor and expander of the positive displacement type, each having an inlet port and an outlet port, with a primary heat exchanger connected between the compressor outlet port and the expander inlet port and a secondary heat exchanger connected between the expander outlet port and the compressor inlet port to complete a closed loop having a charge of gas, the gas being non-condensing at the temperatures and pressures encountered in the unit. An accumulator holds an auxiliary charge of the pressurized gas at a pressure which is lower than the pressure existing in the primary heat exchanger and higher than the pressure existing in the secondary heat exchanger. A first intermittently operated valve couples the accumulator to the secondary heat exchanger for injection of auxiliary gas into the closed loop to raise the pressure in the secondary heat exchanger substantially above the atmospheric level to increase the heat rate of the system.

Abstract: An improved refrigerator system which includes a modular duct unit with control means to provide for the use of the cooler, outside, ambient air to cool a refrigerated cooler to reduce the need to operate at full capacity the normal refrigeration compressor system for the cooler.

Abstract: Apparatus and a method for securing capillary tubes and other small diameter components within a refrigeration machine. A capillary plug button having a retainer plate in which various small diameter components may be secured has extending therefrom a pair of fastening legs. The fastening legs are inserted through an opening within an internal wall of the refrigeration machine such that projections on the legs contact one side of the wall and the retainer plate contacts the opposite side of the wall thereby securing the plug button within the opening and securing the small diameter components within the retainer plate. The retainer plate has a slot connecting the edge of the plate to a plurality of apertures thereby allowing the plug button to be spread apart such that the components may be inserted into the apertures of the retainer plate.

Abstract: The air-to-air split system or packaged heat pump system is used to heat and cool buildings. In the heating mode it extracts heat from the outside air for space heating. Heating and cooling with this type of heat pump is achieved by reversing the flow of refrigerant through the outdoor and indoor refrigerant coils. In the heating mode the outdoor coil acts as an evaporator and extracts heat from the air, the indoor coil acts as a condensor and gives off heat to the air handling system for the building. The reverse action takes place in the cooling mode. The operation of the reversing valve is controlled by a heating and cooling thermostat inside the building.This invention relates to the use of the described heat pump system in the heating mode in combination with the exhaust system for the building to extract heat from the building exhaust air, which is normally exhausted to the outside air without any heat removal.

Abstract: A spline shaft connection between a shaft and a hub with a large number of axially extending teeth and tooth gaps respectively counter-teeth and counter-tooth gaps which form-lockingly engage with one another, whereby a tooth flank clearance is provided between the flanks of mutually contacting teeth and counter-teeth that becomes larger in the direction of the axial extent; the teeth and counter-teeth engage into one another at least approximately uniformly without clearance at least over a small fraction of the axial extent of the spline shaft connection while the remaining part of the axial extent is constructed with a tooth flank clearance that becomes larger in the direction toward the end opposite the flow of forces; the enlargement of the tooth flank clearance thereby follows a law, pursuant to which the tooth flank clearance is a function of the axial coordinate whose first derivative is equal to zero along the axial coordinate at the location of the beginning of the clearance enlargement.

Abstract: A shaft coupling having cooperatively spaced split collars mounted in juxtaposition and releasably locked to each other and to shaft ends for non-axial displacement of a shaft end.

Abstract: A thrust cancelling shaft coupling in which two generally axially disposed flanges are connected by two frustoconically shaped elements positioned in opposite relationship to one another. The large ends of both elements are connected to the flange on one shaft and both small ends are connected to the flange on the other shaft. The thrust forces generated in one element as a result of a tendency to shorten in length under rotational and thrust forces are counteracted by the corresponding forces in the other element so that thrust forces are not transmitted from the element to either the shafts, bearings or other parts of the driving and driven equipment. The larger end of each element is connected to the respective flange, with a sleeve-like member interposed between the larger ends of the elements, and the smaller ends of the elements are connected to a cylindrical member on the opposite flange.

Abstract: The joint comprises a first member defining a tripod connected to a first shaft and forming three trunnions. Part-spherical rollers are respectively slidably and rotatably mounted on the trunnions. A second member connected to a second shaft defines three raceways in which the rollers are received. The raceways are each formed by a pair of part-circular sectioned grooves the mean line of which is an arc of a circle centered preferably in the vicinity of the axis of the second shaft. The tripod is rigid with a shaft section which has, in a zone close to the tripod, a substantially triangular cross-sectional shape approximately constituting the envelope of the free edge of the second member when the joint operates with an angular displacement of the first and second shafts close to the maximum possible angle.

Abstract: An apparatus for absorbing oil pressure in an impact tool with an eccentric oil chamber in a rotatable cylinder connected to a drive with a rotor and spindle. Movement of the rotor relative to the oil chamber urges oil into chambers outside of the rotor. A space chamber formed inside of the cylinder communicating with the oil chamber is filled with a soft elastic member such as foam rubber.

Abstract: An improved vertical axis clothes washing machine and method having wash, rinse, and spin extraction operations including a tub, an agitator, a first basket within the tub, a second basket disposed within the first basket and positioned on the agitator for movement therewith. There is also a water supply for feeding hot and cold water into the machine, electrically powered drive for operating the agitator to effect washing of the fabrics and for rotating the baskets to centrifugally extract water from the fabrics. Water is allowed to flow from the baskets into the tub and may be recirculated from the tub into the baskets during the wash and rinse operations. The improvement is a separate cycle of a continuous wash and rinse operation followed by a spin extraction operation for washing clothes in only the second basket while fresh water is introduced continuously into the second basket during the combined wash and rinse operation and directed to drain and not recirculated.

Abstract: Subject device includes a pair of companionate arcuate arms which (when locked) circumferentially embrace the wheel with one of the arms being movable to an open position to facilitate initial engagement with the wheel. A chassis-strikable lock-bar is fixedly attached to the arcuate arms for making forceable contact with the frame structure of the vehicle as a result of any movement thereof. Thus, the lockbar impedes any significant movement of the vehicle, i.e., whether it be inadvertent or unwarranted. A typical padlock locks the arms together in their closed position and an encasement closely envelopes the padlock shielding it against unwarranted abuse and destruction.

Abstract: A lightweight costume head having a hollow foundation constructed from thin slabs of foamed, elastomeric sections adhered together having an access opening and generally a cloth covering enveloping said foundation is described. The foundation generally has eye openings and may have a nose-mouth opening. The foundation comprises at least five sections cut from the flat slab of a foamed elastomer to form a head shape, frequently a spherical shape from identical sections adhered along their edges.

Abstract: Descaling of metal wire by bending is followed by projection of the scale from the wire. The scale, projected by nozzles in a descaling device, is a mixture of new scale coming directly from the wire undergoing the bendings and scale recycled several times by a recycle feedback path. This application is applicable to the treatment of steel wire known as "rod" coming from hot rolling.

Abstract: A method of and an apparatus for forming by frictional heat and pressure a bossed hole in a metal plate or a tube wall with the aid of a rapidly rotating piercing tool, of which the axial feed is controlled, in such a manner, that during a predetermined time from the point of time, at which the tool comes into contact with the plate or tube wall the axial movement of the tool is slower and after that time said movement is faster than a movement of given speed.

Abstract: A smoothing rolling mill having identical frusto-conical smoothing rollers ounted on axes inclined to the axis of displacement of a tube blank passing between the rollers. The axes of the rollers converge in the direction of displacement of the tube blank. The tube blank is rotated and displaced axially between the smoothing rollers in a conventional manner. If desired, the shafts which mount the rollers for rotation can be pre-loaded with respect to the tube blank.

Abstract: A tool for deburring or finishing a workpiece is mounted for common reciprocatory movement with the wheelhead of a grinding machine. The tool, which is form of an elongated rod, is supported in a housing which is in turn pivoted about an axis transverse to the tool. A biasing means urges the tool toward a predetermined angular position about the pivotal axis of a housing. The tool cooperates with a workpiece to selectively overcome the bias and oscillate the tool in accordance with the relative reciprocatory movement between the grinding wheel and the workpiece.

Abstract: An apparatus for manufacturing heat transfer tubes for use in evaporators and coolers for freezers, air conditioning units, refrigerators, and the like, with close machining tolerances. It forms cavities, with small openings communicating them with the outside, on the inside of a tube, through three steps of forming a multiplicity of alternate grooves and ribs in parallel on the inner surface of the tube, forming cuts in the concentrically directed crests of the ribs, and then forcing the crests sidewise so that the crest of each rib is bent down onto an intermediate part of the adjacent rib to form a cavity in between.

Abstract: A high compression forming machine for forming workpieces such as nuts or like objects includes a toggle action subassembly for operating a Geneva-driven opposed-rams-press and cooperant vertically-disposed multiposition bolster or turret rotatably mounted relative to a frame about a horizontally-extending central axis and having a plurality of spaced, arcuately-arranged horizontally-extending work-receiving cavities extended therethrough, the center of each cavity being located with equal circular pitch along the circumference of a circle and allocated in order of successive operations in the work-forming process. It sequentially deforms workpieces through a simultaneous application thereto of opposing mechanical forces at opposite ends of the workpieces in a step-by-step manner as the bolster is sequentially rotated through a series of stations.

Abstract: An electronic device is provided for use in monitoring and controlling the curing of live food products, specifically grain, in a storage environment. The device includes a first temperature sensing unit, a second temperature sensing unit, a comparator unit, a temperature differential comparator unit and a load switch responsive thereto, and a digital display unit for displaying the monitored temperatures and temperature differentials.

Abstract: An apparatus for reducing the radius of the bend in a U-shaped tube comprises two squeeze dies and a back die. The back die is hollowed to form a chamber that accommodates the bent section of the tube and supports the entire circumference of the tube at the center of the bent section. Mating slide surfaces on the back die and the squeeze dies cooperate to extend the back die during squeezing in such a manner as to accommodate the longitudinal extension of the tube legs that results from the squeezing; i.e., there is no relative longitudinal movement between the squeeze dies and the tube legs. This arrangement enables relatively thin-walled tubes to be squeezed without undue deformation of the tube.

Abstract: There is disclosed herein a safety tie down assembly particularly adapted for use with pulling apparatus of the type employed in the repair of collision damage to motor vehicles. The safety tie down assembly comprises a pair of attachment members fixedly secured to outwardly facing surfaces of the spaced vertically extending members of the pulling apparatus. Chains or the like are attached to each of the attachment members and are designed to be secured to anchors when the pulling apparatus is being operated so as to restrain or limit movement of the pulling apparatus should the primary anchoring assembly break or otherwise let loose.

Abstract: A meter prover is provided in which a substantially spherical plug travels through a U-shaped calibration conduit between two delivery/receiving stations at the ends of the conduit, and each said station contains means for selectively retaining the plug in the station. The retaining means consists of a sleeve with the same cross-section as the conduit which is mounted for horizontal movement toward and away from the conduit end along a plug cage that receives and guides the plug when it emerges from the conduit end. When the sleeve is in a position where it forms a continuation of the conduit end, fluid pressure is able to force the plug through the sleeve into the conduit, but when the sleeve and plug are spaced from the conduit end the fluid is able to bypass the plug and flow directly into the conduit.

Abstract: A gas sensor having a sensitive element of semi conductor type, the sensor being contained within an enclosure adapted to permit gas to come into contact with the element and incorporating means for maintaining adjacent the element, a substantially constant relative humidity.

Abstract: In order to determine the pulse repetition rate of a fluidic oscillator through which a test gas, whose density is to be determined, is flowing, the pressure pulses appearing at one outlet port of the oscillator is sensed with a pressure transducer. The pulses are integrated for a sample period such that, upon transfer or display, the accumulated count directly represents the average pulse repetition frequency during the sample. Means are provided, in a surge tank, for controlling the temperature and pressure of the test gas, and temperature and pressure transducers in communication with the sample fluid in the surge tank are each coupled to voltage-to-frequency converters which drive counters in order that the temperature and pressure of the test gas may also be displayed. An interface to a thermal printer allows the preservation of written records of prf, temperature, and pressure readings. An interface to a digital tape recorder permits magnetic recording of the data for subsequent processing.

Abstract: A closed receptacle has a wall defining an internal space in which the sampling cell is fixed in a stable position, and an external wall into which opens, through an aperture, a connecting conduit connected to the internal space. The receptacle has a removable seal which seals the periphery of the aperture. The apparatus includes a removable means for testing the receptacle, which defines together with the external wall of the receptacle, a sealed zone surrounding the connecting conduit and which communicates with pressure measuring means. The removable testing means includes a key for loosening and tightening the removable seal to permit testing the receptacle for sample leakage without loss of the contents of the receptacle.

Abstract: A viscometer of the type has a chamber within which there are concentric, open ended cylindrical elements, one within the other. A drive is provided to rotate one of the elements and the inner element, which is free to turn, has one end of a readout rod connected axially thereto. The readout rod extends freely through a tube which seals the rod against the fluid flowing through the chamber and its other end is outside the viscometer with the rotor of a readout device connected thereto. The major percentage of the wanted torsional resistance against the turning of the inner element relative to the other element is provided by a resilient device which also ensures lateral stability for the inner element thus enabling the rod-sealing tube to offer but a minor percentage of such resistance. The readout rod is held by a bearing adjacent its outer end and close to the center of gravity of the rotor.

Abstract: An apparatus for measuring the sedimentation characteristics of particulate solids in liquid is disclosed. The apparatus comprises two separate vertical housings adapted to be filled to the same level with a liquid less dense than the particulate solids to be measured, means for introducing a sample of particulate solids to be measured in one of the housings, two pressure sensors located at the same level, one in each housing, and a differential pressure transducer connected to such pressure sensors for sensing the differential pressure caused by the sample introduced into one of the housings. The differential pressure transducer provides an output indicative of the weight percent of sample remaining in suspension as a function of time and such output may be used to determine the weight fraction of the particulate solids passing any given mesh size, or for measuring the specific gravity of particulate material of known dry weight.

Abstract: An apparatus and method to isolate faults in a catalytic converter equipped internal combustion engine.The exhaust is analyzed to determine hydrocarbon content, carbon monoxide content and oxygen content and this data is processed through an electronic circuit which accumulates information to be disclosed at the termination of testing.