Abstract: Ultrasonic multi-element transducers and methods for achieving higher throughput rates in non-destructive testing are provided. By driving the transducer elements sequentially and/or in different combinations, and multiplexing the signals received from each transducer element, the inspection speed at high test sensitivity levels is significantly increased while the number of channels is not increased and cross-talk between the different transducer elements is avoided. At least one such transducer may be mounted on a rotary tester for testing manufactured objects such as tubes and bars.

Abstract: An armature winder having an adjustable winding arm, includes a wire delivery point with two degrees of freedom—one along the longitudinal axis of the armature winder and one transverse to the longitudinal axis of the armature winder. In one preferred embodiment, the adjustable winding arm pivots around an axis transverse to the longitudinal axis of the winder. This pivoting motion allows adjustment of the wire delivery point along an arcuate path, thereby utilizing each of the degrees of freedom simultaneously.