Here is provided a testing apparatus for judging whether or not a device-under-test is defect-free based on static power-supply current of the device-under-test, having a power supply for supplying power for driving the device-under-test to the device-under-test, a pattern generating section for supplying setting vectors for setting a circuit of the device-under-test into a predetermined state to the device-under-test, a power-supply current measuring section for measuring the static power-suppl...

Apparatus and method for testing unvulcanized rubber or rubber-like materials can work at high shear rates (e.g. 100 sec.sup.-1) as a result of applying and maintaining pressure on the test sample as it is being sheared by a rotor in a test chamber. The rotor is smooth-faced. Both conditions simulate more accurately the forces acting on such materials in such operations as extrusion. The test material is transferred into the test chamber through transfer ports from a transfer chamber by a pressu...

The present disclosure relates to a testing tray for use in the conducting of a series of tests on a liquid specimen such as a blood or urine sample, with the results of the individual test being used to provide means for identification of a microorganism present in said specimens. The testing tray includes a plurality of test channels, which are of a generally U-shaped or reverse bend configuration, each channel including an entry portion and a testing portion comprised of one or more test cham...

Abrasion testing, and hence particle content of fluids including liquids and gases is carried out by abrading a thin film 25 of an electrical conductor with the fluid, and measuring the resulting change in electrical resistance of the film. The method can be used to monitor metal particles in oil, and hence the state of wear of oil-lubricated metal parts, and the level of particulate pollution in the atmosphere.

A simplified testing apparatus comprising a test board assembly and an information display sheet. The board includes correct and incorrect answer circuits which are completed by placing a signal manually positionable answer selector unit through a selected aperture in the board. Each aperture registers with an associated answer terminal. Inserting the answer selector, through the selected aperture energizes an answer indicator. The invention display sheet contains a multiple answer format, with ...

Methods (and apparatus) for nondestructively testing a body of material having a surface in contact with a gaseous environment (e.g. air, nitrogen, or inert gas), that comprise (A) the step of (and means for) directing to a region at the surface of the body a pulse of laser radiation having sufficient energy density and sufficiently long wavelength to initiate in the adjacent gas a blast wave that impinges on the surface and provides an ultrasonic wave in the body, and (B) the further step of (a...

A method of deriving the value of any one of the commonly used parameters for characterizing surfaces in surface measurement technology includes the steps of computing the autocorrelation function of a signal representing the surface, and selectively utilizing values of this autocorrelation function together with the value of the sampling interval used in generating the autocorrelation function, to derive the desired parameter values. This method considerably simplifies the information on a surf...

A method of leak testing a transport vessel for radioactive material is disclosed. Tracer gas (helium) and pressurizing driving gas (nitrogen), the latter in condensed form, are introduced into the transport vessel when in open condition. The tracer gas is introduced in a plastic bag which occupies a major part of the interior of the transport vessel the through which the tracer gas diffuses at a low rate. The liquid pressurizing gas is introduced in a smaller vessel. After the transport vessel ...

Apparatus for testing the operability of a signal translation means which passes signal information containing a definable and repeatable characteristic such as a synchronization signal through the use of a spare similar device and a demodulating device which provides outputs upon detecting the signal passed by each signal translating device. As illustrated, regular and spare transmit multiplexing devices are used and logic information obtained from a spare receiver is used to indicate a failed ...

A system is disclosed for voltammetry such as anodic stripping voltammetry including a special electrode mounted to be fitted into a sample holder, stirring means operable through the electrode and an electrolytic potential source, optionally pulsed, capable of scanning the operating potential range which may for example, be a range between about -1 volt and 0 volt. Output recording means can be either an analog chart output or digitalized output. The system may be employed for a wide variety of...