Abstract: A pin is formed with an axial bore at the bottom end for receiving compressed air and containing a diffuser. This bored end has a portion of progressively increasing cross section toward the end. A pair of axially spaced diametrical openings in space quadrature intersect the axial bore. A bumper with a resilient face may be urged toward the pin when an air switch is open. A source of compressed air is coupled to the pneumatic cylinder through an air switch and to sample and reference conduits through a pressure regulator. There are needle valves between the pressure regulator and the sample and reference conduits, respectively. A meter measures the differential air pressure between the sample and reference conduits.

Abstract: Electrical components of various sizes and shapes are appropriately accommodated and positioned at a gauging station, at which lead straightening and testing of electrical functioning of each component is performed. An alternate embodiment provides for distinguishing between acceptable and unacceptable components by differentiating between component lead tips and a contrasting background, through use of an optical scanner.

Abstract: A pipette for carrying out and determining sedimentation rates, in particular that of blood sedimentation, comprises an ungraduated transparent tube (1) of glass, plastic or the like, at the lower end of which a filling connection (2) is provided which, with the aid of a tube-holder branch (4), sealingly retains the tube (1). The filling connection (2) comprises a filling branch (5) for attaching a syringe which contains the sedimentation material. In order to enable the sedimentation material to be filled in without bubbles, the axes of the tube-holder branch (4) and of the filling branch (5) mutually enclose an acute angle--especially of the order of magnitude of 30.degree.--and no cross-section-constricting inserts which would impair the free cross-section of the channel (6) are provided in the filling connection (2).

Abstract: A liquid diluting valve assembly for delivering a pair of different sample volumes in the microliter range along with a predetermined volume of diluent to different locations. The valve assembly includes a pair of outer discs and an inner disc sandwiched therebetween, the facing surface portions being sealingly frictionally engaged. The discs have central axial passages aligned to accommodate a spindle the inner disc being independently movable relative to the other discs. The discs carry passageways with at least one segmenting passageway provided in the inner disc. One of the outer discs is stationary and carries an external hollow loop having a precise volume in the microliter range. The other outer disc carries a single outwardly extending aspirator probe for introduction of a liquid sample from an exterior sample source, the probe being coupled in series with the external hollow loop.

Abstract: A proving system is described wherein there is a cylinder and a moving piston within the cylinder having an indicator rod extending out of the cylinder and a cursor on the rod adapted to move relative to a scale. A jacket surrounds the cylinder to which liquid propane will be circulated in order to equalize the temperature of the prover system prior to proving a meter to be proved. Once the temperature of the prover has been equalized the temperature of the liquid propane by continuously circulating the liquid propane through the jacket, the circulation to the jacket will be shut off and test runs of the liquid propane through the meter can be initiated.

Abstract: A leakage detector of endoscopes inspects cracks and pinholes within an endoscope of the perfect watertight structure by detecting leaked air therefrom while applying compressed air in the endoscope and, when no defect such as cracks and pinholes exists, controls by means of a relief valve so that the rise of air pressure within the endoscope assumes a given value.

Abstract: An injector is described for injecting a sample at a high pressure into a chromatographic column, which avoids sample dilution that is characteristic of bypass loop injectors, and which also avoids significant flow interruption into the column that is characteristic of prior non-bypass injectors. The stator includes pump and column ports with openings (34a, 42a, FIG. 4) at the stator-rotor interface, where the openings are spaced by a small angle (m) of less than 10.degree. from one another. In the load position, a channel (50) formed in the interface surface of the rotor, which connects the pump and column openings in the load position, extends away from the pump opening by an angle (n) which is many times greater than the angle between the pump and column openings. As a result, as the injector is turned toward the inject position, the channel (50) continues to connect the pump and column openings until the rotor is close to the inject position. As the inject position is approached (FIG.

Abstract: Mineral samples are sealed in a nitrile barrier resin which prevents alterations in a sample between the time the sample is taken and the time the sample is analyzed. This resin provides chemical resistance to a core sample and good water vapor barrier properties and excellent oxygen barrier properties. The resin may be laminated with other materials to improve various properties.

Abstract: The flexible force sensor having an electrical conductor releasably attachable to a test site and a plurality of relatively spaced electrical contacts supported for varying contact with the conductor such that when a force is applied to the force sensor, the electrical contacts and electrical conductor move into and out of varying areas and/or paths of electrical contact to produce electrical resistances therebetween corresponding to the extent of such areas and/or paths and as a function of the applied force.

Abstract: The specification discloses a method and apparatus for calibrating liquid flow meters of all types. The system includes a scale for dynamically determining the weight of a liquid flowing through a flow meter, together with means for measuring the flow through the flow meter being tested. In the case of a glass tube flow meter, a float detection system is used, whereby the operator will set the flow through the flow meter to a desired point, use the float detection system to make certain the float stays in a fixed position during the test, as well as to locate the float from a reference point, and use the system to measure the flow through the flow meter during a fixed period of time, thereby obtaining a reading, in engineering units, for each predetermined position of the float.

Abstract: A temperature-actuated flow control device has a fluid inlet connected to an exhaust line with a control chamber located therebetween. The control chamber has a free-floating bi-metallic circular element which is flexed in response to temperature changes between a first position stopping flow between the inlet and the exhaust line and a second position opening the flow therebetween. This flow control device, when adapted to a gas sampling system, allows the bi-metallic element remain in a first position at normal operating temperatures to permit the continuous sampling of the sample gas. Whenever the temperature falls below the dew point of the sample gas, the bi-metallic element returns to its second position to stop the sampling of sample gas by the system to prevent condensation in the system.

Abstract: Sample-taking apparatus, includes a container for bulk material feed, the container having an upper cover region, a lower discharge region and a side wall having a discharge opening formed therein, the bulk material feed flowing at least discontinuously from the upper cover region to the lower discharge region of the container, an exposed sample-taking worm being attached to the side wall and projecting through the discharge opening into the feed for conveying bulk material samples from the feed by rotating, a rotary drive connected to the sample-taking worm, and a collecting device integral with the container, the worm having a shaft with an end, at least the end being immersed in the feed, the worm having worm threads formed thereon with surfaces forming an imaginary surface of projection extended normal to the worm shaft, the worm thread surfaces forming worm segments with increasingly smaller conveying surfaces as seen in direction toward increasing depth of immersion of the worm into the feed, during sam

Abstract: A liquid micro-dispensing pipet consisting of a main barrel with a snap-on dispensing tube tip. An axial, upwardly spring-biased operating shaft is slidably and rotatably engaged in the barrel, connected to a plunger in the dispensing tip. The snap-on tip can be at times disengaged from the barrel by exerting axial downward force on the shaft. Stop means to limit the intake movement of the plunger is provided, said stop means consisting of an abutment sleeve slidably and non-rotatably mounted on the upper portion of the shaft and threadedly engaged in the barrel, the abutment sleeve being engageable from below by a stop washer secured on the shaft, which is normally urged upwardly by its biasing spring. The normal elevated position of the plunger can be varied by rotating the barrel relative to the shaft.

Abstract: This invention relates to an apparatus for automatically sampling a clarified test solution from a suspension to be tested, which comprises two filtering tubes being immersed in the suspension, a circulator connected to the one tube, and a sampling cell connected to the circulator and the other tube. The suspension is sucked by the circulator and filtered through the one tube. The filtered and clarified test solution is sampled in the sampling cell and the residual test solution is returned to the suspension through the other tube. A flow direction of the test solution is reversed at intervals so that the filtering tubes are not blocked by suspending solids.

Abstract: A method for measuring an adhesive strength of a multi-layer material having at least two layers, such as a plain bearing, which method includes the steps of placing a mold on one surface of the multi-layer material, casting a brazing metal into the mold to form and secure a resulting cast structure to the one surface of the multi-layer material such that the cast structure includes a first column portion connected to and extending substantially upright from the one surface of the multi-layer, an intermediate portion extending and diverging in diameter from the upper end of the first column portion and a second column portion extending from the upper end of the intermediate portion, causing the opposite chucks of a tension tester to grasp the second column portion and the multi-layer material or a holder connected to the multi-layer material, respectively, and applying a tensile force to the respective layers of the multi-layer material in a direction transverse to the one surface of said multi-layer material

Abstract: Process for high-precision measurement of the phase relationship and phase displacement, respectively, of two pulse trains wherein rotational angles of two rotating bodies are quantized and converted by incremental shaft encoders into pulse trains, and the pulse trains are applicable for calculating the respective phase relationship and phase displacement, which comprises the steps of:a. counting the pulse trains in at least two different counters;b. forming a digital difference of the two counts;c. converting the digital difference into an analog signal;d. decoding the analog signal; ande. displaying the decoded analog signal;and a device for performing the process.

Abstract: A pressure generator for testing and calibrating pressure transducers has a body with an internal chamber. The chamber is filled with a liquid, statically pressurized. A piston is mounted in the chamber on a suspension member. A coil, mounted to move with the piston, is arranged in a magnetic field. The coil is supplied with varying current to cause the piston to oscillate or dither in the chamber. Such oscillation creates a dynamic pressure which is superimposed on the static pressure. Openings are provided in the body to receive the sensing end of one or more pressure transducers.

Abstract: A vacuum sample introduction device includes a roller bearing assembly which rigidly supports a probe rod for accurate reciprocation relative to the device.

Abstract: A sphere with a hole through one diameter is held in a spherical chamber hin a tube. The axis of the tube and the hole through the sphere are out of alignment by some predetermined angle, .theta.. The sphere is held within the chamber and the entire unit is caused to spin. The sphere is released while the unit is still spinning. The gyroscopic nutation of the sphere causes the spherical bore to traverse the angle .theta. and align with the tubular bore in a time dependent upon the sliding friction between the material of the sphere and the material of the spherical chamber.

Abstract: A measuring device for checking the tightness of an ear impression mold serving as pattern for the production of an otoplastic and/or of an otoplastic inserted in the auditory passage of an ear through which an air pressure deviating from the air pressure prevailing on the outside can be produced, via an air permeable connection, in the inner space defined by the ear drum and the ear impression or otoplastic. Through the device changes in the generated deviating air pressure can be measured. The air permeable connection is connected to a pump serving for the generation of the deviating air pressure via a pressure chamber whose volume is a multiple of the volume of the inner ear space. A control circuit presetting the timing of the pumping and measuring process is provided. The device is insensitive to differences in the volume of the inner ear space and produces reproducible test results which reliably indicate the quality of the ear impression of otoplastic.