Abstract: A method of forming an overmolded plastic structure on a metallic plate includes first bonding a component to the metallic plate. The component is bonded with an adhesive that adheres it to the metallic plate. A plastic structure is formed over at least a portion of the component and the metallic plate and the plastic structure primarily adheres to the component. The component can be a set of metallic signal conductors that are used to route electrical signals across the metallic plate and the adhesive can be used to electrically insulate the signal conductors from the metallic plate.

Abstract: Improved techniques are disclosed for housing electronic components. A first housing member can be made to have an exterior surface that covers a majority of the housing. The first housing member can be of unitary construction. The first housing member can be seamlessly constructed. The first housing member can be formed in one injection molding. An electrical power conduction pin can extend through an aperture in a cover plate, and can be arranged for mechanically coupling the cover plate with a major interior surface of the first housing member, so as to secure the cover plate to the first housing member.

Abstract: A drum clamping unit for plastics material drums with peripheral "L'8 chime rings below the drum head is adapted to be mounted on suitable lifting and transporting devices such as lift trucks, overhead cranes, and the like to automatically engage, latch onto, and discharge one or more of the molded plastics material drums without damaging the drums. The unit has a plurality of clamping jaws automatically triggered to clamping positions by the drum heads as the unit is lowered alongside the drums. These clamping jaws are positioned to engage only with the bottom and inner face of the "L" chime ring of each drum and remain clear of the drum head and drum periphery thereby avoiding any damage to the drums especially as they are raised to clamp onto the "L" rings. Then, when the raised clamped drums are conveyed to and lowered on a desired location, the jaws are released, retracted automatically and held in a retracted position until the unit is again lowered to engage a drum head in a subsequent operation.

Abstract: A two-wheeled drum or barrel transporting truck slidably mounts a drum flange or chime clamp which is powered from an energy source on the truck to raise the drum for depositing the same on a pallet or the like. An electric motor driven linear actuator on the truck is energized from a battery also carried on the truck to drive the clamp. A double pole switch on or adjacent the handlebar of the truck controls a circuit to drive the motor in opposite directions. The clamp when raised against the chime ring of a barrel or drum automatically locks the drum to the truck. Rollers on the truck embrace and cradle the drum so that it is easily raised and lowered on the truck.