Abstract: An acoustic touch position sensor is shown wherein a transducer coupled to a side of a substrate imparts a shear wave into the substrate that propagates along a first axis. A shear to Lamb wave converting array disposed along the first axis converts the shear wave to Lamb waves propagating along a plurality of parallel paths where each path is associated with a different axial position on the substrate relative to the first axis. The Lamb waves are converted back to shear waves by a Lamb to shear wave converting array disposed along an axis parallel to the first axis, the second converting array being spaced across a touch surface of the substrate from the first array. The shear wave from the second converting propagate to a receiving transducer that provides a signal representative of the waves.

Abstract: A high voltage electronic component test apparatus includes a test chamber containing a pair of electrodes across which a high voltage is applied and between which a component is placed in circuit by means of a movable component gripper assembly for the testing thereof. Voltage generating and electrical measurement apparatus is coupled to the electrodes for applying a high voltage thereacross and for measuring the resulting current within the electronic component. From the component testing, the remotely operated gripper assembly then removes the tested component from the test chamber and introduces another component for testing therein. A closed, circulating liquid-vapor system coupled to the test chamber introduces an electrically inert vapor, such as Freon or a fluorinated hydrocarbon, into the test chamber to prevent arcing and eliminate leakage currents therein.