Abstract: The invention consists of an improvement to a four-wheel device used to lift drums with compressed air stored in an on-board storage tank without special straps, tools or clamps that allows the operator to lift the drum with no physical stress and to roll the drum to another location with minimum effort and allows force measuring (weighing) of the drum.

Abstract: Incorporated in a tensile member by which a hopper or the like is suspended from a ground-supported frame is an electronic load cell which is constructed and arranged to report to a convenient control location a signal which corresponds to the tension in tensile member as a measure of the weight of the material such as sand, crushed stone, cement or ore in the hopper. In order to prevent lightning which may strike the hopper or support frame from travelling along the tensile member and damaging or destroying the load cell, the tensile member is electrically isolated from both the hopper and the support frame by bushed connectors wherein the insulating bushing portion is stressed in compression. These bushed connectors simultaneously provide this electrical shock isolating function and both carry the static load and accommodate mechanical shock produced upon sudden changes in load, as when a load of stone is dumped into or dispensed from the hopper.