Abstract: A machine for testing for air seal leaks in wheel rims which includes closure members for enclosing the inner chamber defined by the wheel hub and an outer casing which surrounds the closure members and into which a fluid is introduced under pressure. A liquid circuit is provided for initially filling the inner chamber with an incompressible liquid and a detection device communicates with the circuit to measure increases in pressures resulting from fluid leaking into the inner chamber during testing.

Abstract: An evaporative emission control system for an automotive vehicle comprises an integrated roll-over valve and vapor pressure sensor assembly mounted by means of a grommet in the top wall of the vehicle's fuel tank. The vapor pressure sensor forms part of an on-board diagnostic system for testing the integrity of the tank and vapor collection canister against leaks.

Abstract: A leak detection system having a tank with a tank bottom and a containment baffle disposed above the tank bottom defining a containment space therebetween. The containment baffle supports a stored material within the tank. An inert gas supply is connected to the containment space for passing an inert gas into the containment space. An inert gas flow sensor is interactive with the inert gas supply so as to sense the flow of inert gas into the containment space. An alarm is connected to the inert gas flow sensor so as to produce a humanly perceivable signal in relation to gas flow above a predetermined limit. A leak detector is also provided interactive with the containment space for detecting and sending signals in relation to the presence of materials within the containment space. A pressure regulator is interactive with the inert gas supply so as to limit the pressure of inert gas within the containment space.

Abstract: A system for measuring the transmission rate of volatile organic chemicals through a barrier material, where a barrier material sample is clamped in a test cell so as to form a chamber on both sides of the material, with a temperature-controlled test gas conveyed into one chamber and a temperature-controlled carrier gas conveyed through the other chamber. The carrier gas is passed through a cryotrap where the organic chemicals are collected, and the carrier gas with collected chemicals is then burned in a flame ionization detector to measure the quantity of organic chemicals.

Abstract: A method and apparatus for leak testing a fluid containing chamber wherein the chamber is pressurized with a gas and is submerged in a liquid. The bubbles of gas rising from the submerged chamber are directed past a plurality of a predetermined locations that are each in optical communication with a photoelectric detector. The signals from the detectors are counted and when the number of bubbles exceeds a predetermined number, a signal is activated indicating a leaking container. By grouping a number of adjacent photoelectric detectors into a predetermined set, the apparatus can discriminate between random bubbles rising from the chamber surface as it is submerged and a number of bubbles all originating from a given location indicating a leak. The photoelectric detectors may be positioned in the liquid adjacent the predetermined locations or positioned out of the liquid and coupled to the predetermined locations by fiber optic cables.

Abstract: A pool leak detector for use in combination with a pole having a proximal end to be used as a handle and a distal end to be submerged in the pool, the detector comprising means for providing a container of dye carried on the distal end with the container having exit port means for conveying dye from the container. Battery-operated actuating means for releasing dye from the container through the port means is provided, the actuating means comprising a battery pack for supplying electrical energy carried on the proximal end of the pole and an electrically-operated actuator carried on the distal end of the pole. The container is a collapsible container, and means for placing the container under load to eject dye from the exit port means is provided.

Abstract: A gas leak detection system comprises a flow sensor for detecting the amount of gas flowing through a gas flow passage, a flow signal generator for producing a flow signal representing the quantity of gas flow detected by the flow sensor, a pressure sensor installed in the gas flow passage at a point upstream of the flow sensor for detecting the gas pressure in the gas flow passage, a pressure signal generator for producing a pressure signal representing fluctuations in the pressure detected by the pressure sensor and a computing device electrically connected with the flow signal generator and the pressure signal generator. When it is found that no flow signal is being produced, the pressure fluctuation is compared with a prescribed pressure fluctuation range and a leak signal is produced when the pressure fluctuation value falls within the prescribed range.

Abstract: According to the present invention, there is provided a flow tester for thermoplastic which uses an extrusion type plastometer including a vertically supported cylinder, a piston on which a weight is mounted at an upper portion thereof and which is inserted in the cylinder, a die mounted on a lower end of the cylinder, and a heater provided to surround the cylinder, characterized in that a sample of a thermoplastic is filled in the cylinder and is heated by the heater to melt, the molten sample is extruded from the die by the piston, a strand as an extruded material is cut, and a mass thereof is obtained, thereby testing a flow characteristic of the thermoplastic, characterized by including a strand bottle which has a cutting edge for cutting the strand and which catches the strand cut by the cutting edge, a strand bottle stocker for storing the strand bottle before and after use, a weight measuring unit for measuring a weight of the cut strand together with the strand bottle, a strand cutting unit for moving

Abstract: Method and apparatus for leak-testing a filled and closed flexible package, in which the package is placed on a vertically movable support member and is compressed between the support member and a pressure member bearing on the top of the package as a result of relative movement of these members towards each other. The change in the pressure is measured for a fixed measuring time and from this the presence or absence of a leak is determined.The support member supports the package, substantially completely filled with a liquid product, by means of springs. The package is compressed by lowering the pressure member onto the package, the support member thereby being pressed downwards against the spring force acting on the support member.For a fixed measuring time, the change in the spring force is measured for determining possible leakage of liquid from the compressed package.

Abstract: A method and device (10) for testing condoms, the device (10) comprises a perforated, elongated plastic, cylindrical member (12) having a head (14) at one end thereof, a body (16) and a base (18) at the other end thereof. Fitable into the hollow interior of cylindrical member (12) is a plunger assembly (30) with a piston (78) thereon. Perforations (20) in the body (16) of the cylindrical member (12) provide communication with a sleeve (28) in which the piston (78) rides. A condom is unrolled over cylindrical member (12) and sealed air-tight to the base (18) thereof. Pumping the piston (78) inflates the condom where it can be inspected for perforations, tears, and porosity. A flap valve (35) in the piston (78) allows air in the condom to escape through the perforations (20) and through a whistle means (42) to provide an audio signal whose pitch is a function of velocity of air through the signal and thus indicative of the porosity of the condom membrane.

Abstract: An apparatus for testing a tube for its strength to resist internal pressure, is composed of: an expandable elastomer having a hollow body with one open end; a test head, connected to the expandable elastomer, to provide the expandable elastomer with pressure using fluid as a medium; a holder, disposed below the test head, to vertically move a tube into a place in which the expandable elastomer is inserted into a tube; and a transferring mechanism, arranged beside the holder, to provide the holder with a tube from a rack. The apparatus according to the present invention can automatically and continuously test numerous tubes for its strength to resist internal pressure, overcoming disadvantages of the non-automatic, non-continuous apparatus previously disclosed.

Abstract: A portable air quality indication unit senses and indicates at least the ambient concentration of aerosols and particulates, the ambient concentration of a gas such as CO, the ambient temperature and the relative humidity, and displays the same. The gas concentration level and particulates concentration level are provided as good or satisfactory, bad or unsatisfactory, or fair/good, i.e., marginal depending on the relation of the detected level to the predetermined threshold level values of gas concentration, and particulates concentration. Temperature and relative humidity can be displayed on liquid crystal displays. A microprocessor circuit within the unit assumes a low-power standby mode, in which the gas and particulates sensor means are sampled at a relatively low rate, when the particulates level and gas concentration level are below their respective TLVs.

Abstract: An apparatus for testing the gas-tightness of a joint between hollow members which has, in one aspect, a mechanism for applying a test gas to the outside of a joint, detection apparatus for detecting the gas inside the hollow members, and wherein the mechanism for applying the test gas to the outside of the joint has a gas testing chamber, a sealing ring for hermetically sealing the gas testing chamber, a casing enclosing the sealing ring, apparatus for applying pressure to the sealing ring, and apparatus for supplying test gas to the gas testing chamber.

Abstract: A method and apparatus for determining the contents of salt and water in a water-in-oil type emulsified product are disclosed herein. In the method, two kinds of physical quantities which are related to the contents of water and salt in the water-in-oil type emulsified product and are capable of being measured in a short time are measured. Then, values of the contents of water and salt are calculated from the two physical quantities measured, by use of a bivariable multiple regression equation wherein the two physical quantities are used as explanatory variables and the contents of salt and water are used as objective variables.

Abstract: An apparatus and method for measuring conductive airborne particulates in which a filter (16) having a pair of interdigitated electrodes (18, 20) printed on its surface is placed in a sampling chamber (14). A pump (10) draws air (12) through the chamber and through the filter with airborne particles being deposited on the side of the filter with the electrodes. The resistance between the electrodes is measured (22) without removing the filter from the chamber.

Abstract: The invention relates to a process and a device for measuring the gelling of paraffin petroleum products, in particular, crude oil. The process involves: measuring, with respect to the temperature and over a given thickness, the propagation velocity and the amplitude of an ultrasonic wave in the crude oil being analysed; then determining the transition temperature T.sub.t, at which a sudden change in the thermal variation in the inverse of the propagation velocity is observed; determining the ratio of the slopes for the propagation velocity inverse obtained between the linear parts of the thermal variation of said propagation velocity, around said brake point corresponding to T.sub.t, above and below, respectively, the determined temperature T.sub.t ; determining the ultrasonic signal amplitude difference .DELTA.A between the temperature T.sub.t and a given lower reference temperature, for example T.sub.t -5.degree. C.

Abstract: A gas concentration and/or bulk flow rate sensor suitable for measuring the oxygen concentration and the bulk flow rate of gas delivered to a patient for medical purposes. Two piezoelectric transducers mounted on a printed circuit board are interconnected by an elongated coiled tube. The gas is flowed around one of the transducers, through the tube and around the other transducer. Periodically, one of the transducers is energized with a single short duration pulse to transmit a sonic wave through the gas to the other transducer. The travel time for the sonic wave is measured. The two transducers are alternately used as transmitters and receivers so that the wave travel time is measured both with and against the gas flow direction. A thermistor is located in the center of the coiled tube for measuring the temperature of the gas. From the measured times, the measured temperature and stored formulas, a microprocessor calculates the oxygen concentration and/or the bulk flow rate for the gas.

Abstract: A method for rapidly and accurately determining the threshold and critical capillary pressures of a porous rock sample. A fluid saturating the sample, preferably oil, is withdrawn from the downstream end of the sample at an extremely low rate as a result of the introduction of another fluid, preferably gas, at the upstream end. The other fluid displaces the saturating fluid due to a differential pressure between the upstream and downstream ends of the sample. The differential pressure is created by means which does not require use of back pressure valves, thereby avoiding pressure surges and allowing constant slow withdrawal of the saturating fluid. The threshold and critical capillary pressures may be determined from a trace of the differential pressure.

Abstract: Air is jetted into the reed groove of a modified reed in a manner equivalent to that in which air is jetted in practical weaving operation, air-speed is measured at a plurality of measuring points in the reed groove on each of a plurality of planes perpendicular to the longitudinal direction of the modified reed, a maximum air-speed among air-speeds at the measuring points in each plane is determined, and the positions of the measuring points respectively corresponding to the maximum air-speeds are provided in a visually recognizable state.

Abstract: The gas analyzer comprises a detector (3) which is dependent upon the mass flow, with a suction device (4) at the detector output. The detector output is connected to a vacuum regulating circuit (6) which maintains the vacuum constant, generated by the suction device (4), at the detector output in relation to the atmospheric pressure. The detector (3) is preceded by a choke (2) in the pipe-line for the gas to be measured. A second choke (11) is connected in parallel, by way of by-pass, to the series arrangement of the first choke (2) and the detector (3). A further (third) choke (1) is connected in advance of the common gas inlet (12, 13). A second vacuum regulating circuit (14) is connected to the common connection point and maintains the pressure constant, prevailing at said connection point, in relation to the atmospheric pressure.