The leaky or non-leaky condition of a membrane-sealed container is determined by causing motion in one direction of one portion of the membrane; sensing motion in a direction opposite the first direction of another portion of the membrane; and delivering a corresponding signal indicative of the leaky or non-leaky condition.

A method of testing transformers and other inductive devices comprises monitoring displacement of a conductor in a winding by injecting a high frequency alternating signal into the conductor while a supply-frequency alternating current is flowing in the conductor and subsequently observing the modulation of the high frequency signal resulting from displacement of the conductor. The high frequency signal has a frequency in the region of the resonance frequency of stray capacitances and inductance...

An apparatus and method for conducting pull testing of the wires and wire bonds of an electronic apparatus in which a bond wire is engaged by a hook, and the force with which that wire is urged to move away from the hook is measured as the force required to maintain the hook stationary.

The leaky or non-leaky condition of a flexible, closed container is tested by increasing the pressure within the container (by causing motion of a wall of the container), and monitoring the resulting rate of change of a predetermined parameter (wall position or force exerted by the wall); the monitored rate of change indicates the leaky or non-leaky condition. In another aspect the time-varying net force on a container is the basis for determining the leaky or non-leaky condition.

Cylindrical tablets are tested on a circular testing table by first weighing, then adjusting their position relative to a part of the table pushing them round the circular path in response to the weight measurement, then measuring their thickness and finally testing their crushing strength. The table has radial slots with a concave (preferably V-shaped) outer portion for urging the tablets round the circular path.

This invention concerns a resilience testing gauge and a resilience testing system, which includes the gauge, suitable for testing the seal quality of partly inflated bags. This invention also concerns a method of testing the seal quality of partly inflated bags using the resilience testing gauge. The gauge employs a first (2) and a second (3) beam cantilevered from a rigid block (4). In use the rigid block (4) is vibrated and one of the beams (3) is brought into contact with the article under t...

A vehicle testing system for simulating a vehicular motion and vehicular vibration caused thereby is provided to test a front or rear wheel section of a four-wheel vehicle. The testing system comprises a vehicle suspension system, a wheel attached thereto, a first actuator for exciting the wheel based on data concerning road and other conditions, and a dummy vehicle body linked to the suspension system and having a frame, a reaction measuring device linked to the frame and a second actuator for ...

An environmental chamber and test transport apparatus is disclosed for automatically testing a plurality of packaged integrated circuits. A plurality of packaged integrated circuits are fed from a loaded magazine onto a transport tape which carries them into a nonconductive temperature controlled fluid bath to a test station submerged in the bath. As each packaged integrated circuit reaches the test station, its progressive movement is stopped and the circuit package is laterally engaged with a ...

A method for simulating a tire burst in a pneumatic tire comprising preforming a hole in the sidewall of the tire and plugging the hole with a hollow rubber bung closed at the end only, the closed end being disposed towards the exterior of the tire. The rubber bung is retained in the hole when the tire is inflated and subequently released from the hole to simulate a tire burst, of which the following is a specification.

A unit for retaining a disposable electrophoresis test kit adapted for detecting the presence of hepatitis associated antigen and the like includes a base, means for illuminating said test kit spaced within said base, a work platform for supporting the test kit, wherein the platform has at least one pair of electrodes oppositely disposed thereon and connected to said base for generating an electric potential across said test kit; a removable cover connected to said base for enclosing said unit, ...