Abstract: A repositionable abrasive disc mounting assembly comprises a backup pad and a clamp assembly. The backup pad has a rotational axis of use and a major surface with projections extending outwardly therefrom. The backup pad further comprises an inwardly facing centrally disposed first fastening member, and also an outwardly facing centrally disposed second fastening member. The clamp assembly comprises inner and outer clamp members for securing an abrasive disc. The inner clamp member comprises an inwardly facing centrally disposed third fastening member adapted to repositionably engage the second fastening member in a discrete number of rotational orientations. The inner clamp member further comprises an outwardly facing centrally disposed fourth fastening member. The outer clamp member comprises an inwardly facing centrally disposed fifth fastening member adapted to securely engage the fourth fastening member. A method of abrading a workpiece using the repositionable abrasive disc is also disclosed.

Abstract: Wooden utility pole structures are nondestructively tested while in service, in particular utility pole cross-arms. A helicopter or boom truck brings an operator to the cross-arm. Manually striking the cross-arm using a hammer or other weight with an attached accelerometer senses and sends a shock wave through the cross-arm. The shock wave also is sensed using a second accelerometer sensor in a temporarily affixed sensor pod at the other end of the cross-arm, or alternatively, a non-contact radar vibration sensor is trained on a fastener in the cross-arm, to sense vibration from the shock wave. Practical aspects include mounting particulars for affixing the sensor pod against the cross-arm, manipulating the sensor pod at an elevation below the helicopter working platform, measurements for dimensions and density, etc. The data is received at a processor and correlated with structural strength or used to rank the relative strength of cross-arms.

Abstract: A thermal print head including a conductive base plate, a substrate slab mounted on the base and having various deposits on the upper and lower surfaces thereof, such deposits including conductive traces, conductive leads, a thermally insulating material, resistors, and conductive deposits for delivering electrical potential across the resistors, one or more integrated circuits mounted on the slab for controlling said print head based on electrical signals from external data processing equipment and connectors for delivering signals and potentials to the print head.

Abstract: A thermal print head including a conductive base plate, a substrate slab mounted on the base and having various deposits on the upper and lower surfaces thereof, such deposits including conductive traces, conductive leads, a thermally insulating material, resistors, and conductive deposits for delivering electrical potential across the resistors, one or more integrated circuits mounted on the slab for controlling said print head based on electrical signals from external data processing equipment and connectors for delivering signals and potentials to the print head.